int main(int argc, char* argv[])
{
int nz,nx,ny,sou_z,sou_ox,sou_oy,sou_jx,sou_jy,sou_nx,sou_ny,rec_z,rec_nx,rec_ny,npad,noff,roll;
int dim1, dim2;
sf_axis ad1=NULL, ad2=NULL;
sf_file Fgeo=NULL;
int **geo=NULL;
sf_init(argc,argv);
if (!sf_getint("nz",&nz)) sf_error("Need nz="); /* dimension in z */
if (!sf_getint("nx",&nx)) sf_error("Need nx="); /* dimension in x */
if (!sf_getint("ny",&ny)) sf_error("Need ny="); /* dimension in y */
if (!sf_getint("sou_z", &sou_z )) sf_error("Need sou_z=" ); /* source position in depth */
if (!sf_getint("sou_ox",&sou_ox)) sf_error("Need sou_ox="); /* source starting location in x */
if (!sf_getint("sou_oy",&sou_oy)) sf_error("Need sou_oy="); /* source starting location in y */
if (!sf_getint("sou_nx",&sou_nx)) sf_error("Need sou_nx="); /* number of sources in x */
if (!sf_getint("sou_ny",&sou_ny)) sf_error("Need sou_ny="); /* number of sources in y */
if (!sf_getint("sou_jx",&sou_jx)) sou_jx = (sou_nx>1)? (nx-sou_ox)/(sou_nx-1):0; /* source interval in x */
if (!sf_getint("sou_jy",&sou_jy)) sou_jy = (sou_ny>1)? (ny-sou_oy)/(sou_ny-1):0; /* source interval in y */
if (!sf_getint("rec_z", &rec_z )) sf_error("Need rec_z=" ); /* receiver position in depth */
if (!sf_getint("rec_nx",&rec_nx)) sf_error("Need rec_nx="); /* number of receivers in x */
if (!sf_getint("rec_ny",&rec_ny)) sf_error("Need rec_ny="); /* number of receivers in y */
if (!sf_getint("npad",&npad)) sf_error("Need npad="); /* computational domain padding */
if (!sf_getint("noff",&noff)) sf_error("Need noff="); /* near offset */
if (!sf_getint("roll",&roll)) sf_error("Need roll="); /* acquisition pattern: 0-> fixed-spread, 1-> towed-streamer to the negative */
/* double check dimension */
if (sou_nx > (nx-sou_ox)/sou_jx+1) {
sou_nx = (nx-sou_ox)/sou_jx+1;
sf_warning("Setting sou_nx to %d",sou_nx);
}
if (sou_ny > 1 && sou_ny > (ny-sou_oy)/sou_jy+1) {
sou_ny = (ny-sou_oy)/sou_jy+1;
sf_warning("Setting sou_ny to %d",sou_ny);
}
/* do the work */
dim1 = 14;
dim2 = sou_nx*sou_ny;
ad1 = sf_maxa(dim1,0,1); sf_setlabel(ad1,"acqpar"); sf_raxa(ad1);
ad2 = sf_maxa(dim2,0,1); sf_setlabel(ad2,"shot"); sf_raxa(ad2);
Fgeo = sf_output("out");
sf_settype(Fgeo,SF_INT);
sf_oaxa(Fgeo,ad1,1);
sf_oaxa(Fgeo,ad2,2);
geo = sf_intalloc2(dim1,dim2);
geogen(geo,nz,nx,ny,sou_z,sou_ox,sou_oy,sou_jx,sou_jy,sou_nx,sou_ny,rec_z,rec_nx,rec_ny,npad,noff,roll);
sf_intwrite(geo[0],dim1*dim2,Fgeo);
exit(0);
}
int main(int argc, char*argv[])
{
sf_file in, out ;
int i1, i2, n1, n2, *v;
float o1, d1, **u;
char *l1, *u1;
sf_axis ax;
sf_init(argc, argv);
in = sf_input("in"); /* delay file (int) */
out = sf_output("out");
if(!sf_histint(in, "n1", &n2)) sf_error("n1 needed");
sf_shiftdim(in, out, 1);
if(!sf_getint("n1", &n1)) n1=1000; /* samples */
if(!sf_getfloat("o1", &o1)) o1=0.0; /* sampling interval */
if(!sf_getfloat("d1", &d1)) d1=0.004; /* original */
if((l1=sf_getstring("l1")) == NULL) l1="Time"; /* label "Time" */
if((u1=sf_getstring("u1")) == NULL) u1="s"; /* unit "s" */
ax = sf_maxa(n1, o1, d1);
sf_setlabel(ax, l1);
sf_setunit(ax, u1);
sf_oaxa(out, ax, 1);
sf_putint(out, "n2", n2);
sf_settype(out, SF_FLOAT);
v = sf_intalloc(n2);
u = sf_floatalloc2(n1, n2);
sf_intread(v, n2, in);
for(i2=0; i2<n2; i2++)
for(i1=0; i1<n1; i1++)
if(i1==v[i2]) u[i2][i1] = 1;
else u[i2][i1] = 0;
sf_floatwrite(u[0], n1*n2, out);
free(v);
free(u[0]);
free(u);
return 0;
}
int main(int argc, char* argv[])
{
bool verb,adj;
/* I/O files */
sf_file Ftrc=NULL; /* traces */
sf_file Fcoo=NULL; /* coordinates */
sf_file Fwfl=NULL; /* wavefield */
/* cube axes */
sf_axis at,az,ax,aa,ac;
/* I/O arrays */
float *wco=NULL; /* traces */
pt2d *coo=NULL; /* coordinates */
lint2d cow; /* weights/indices */
float **wfl=NULL; /* wavefield */
fdm2d fdm=NULL;
int iz,ix,it;
int nz,nx;
float dz,dx;
float oz,ox;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
/*------------------------------------------------------------*/
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("adj", &adj)) adj=false; /* adjoint flag */
/*------------------------------------------------------------*/
/* setup I/O */
Fcoo = sf_input("coo"); /* coordinates */
ac = sf_iaxa(Fcoo,2); sf_setlabel(ac,"c"); sf_setunit(ac,"");
coo = (pt2d*) sf_alloc(sf_n(ac),sizeof(*coo));
pt2dread1(Fcoo,coo,sf_n(ac),2); /* read (x,z) coordinates */
if(adj) {
Fwfl = sf_input ("in"); /* wavefield */
Ftrc = sf_output("out"); /* traces */
az = sf_iaxa(Fwfl,1); sf_setlabel(az,"z");
ax = sf_iaxa(Fwfl,2); sf_setlabel(ax,"x");
at = sf_iaxa(Fwfl,3); sf_setlabel(at,"t");
aa = sf_maxa(1,0,1);
sf_oaxa(Ftrc,ac,1);
sf_oaxa(Ftrc,at,2);
sf_oaxa(Ftrc,aa,3);
} else {
Ftrc = sf_input ("in" ); /* traces */
Fwfl = sf_output("out"); /* wavefield */
at = sf_iaxa(Ftrc,2); sf_setlabel(at,"t");
if(!sf_getint ("nz",&nz)) nz=1;
if(!sf_getfloat("oz",&oz)) oz=0.0;
if(!sf_getfloat("dz",&dz)) dz=1.0;
az = sf_maxa(nz,oz,dz);
sf_setlabel(az,"z");
if(!sf_getint ("nx",&nx)) nx=1;
if(!sf_getfloat("ox",&ox)) ox=0.0;
if(!sf_getfloat("dx",&dx)) dx=1.0;
ax = sf_maxa(nx,ox,dx);
sf_setlabel(ax,"x");
sf_oaxa(Fwfl,az,1);
sf_oaxa(Fwfl,ax,2);
sf_oaxa(Fwfl,at,3);
}
if(verb) {
sf_raxa(az);
sf_raxa(ax);
sf_raxa(at);
sf_raxa(ac);
}
/* allocate wavefield arrays */
wco = sf_floatalloc (sf_n(ac));
wfl = sf_floatalloc2(sf_n(az),sf_n(ax));
/* interpolation coefficients */
fdm = fdutil_init(verb,'n',az,ax,0,1);
cow = lint2d_make(sf_n(ac),coo,fdm);
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<sf_n(at); it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
if(adj) {
sf_floatread(wfl[0],sf_n(az)*sf_n(ax),Fwfl);
lint2d_extract(wfl,wco,cow);
sf_floatwrite(wco,sf_n(ac),Ftrc);
} else {
sf_floatread(wco,sf_n(ac),Ftrc);
for (ix=0; ix<sf_n(ax); ix++)
for(iz=0; iz<sf_n(az); iz++)
wfl[ix][iz]=0;
lint2d_inject(wfl,wco,cow);
sf_floatwrite(wfl[0],sf_n(az)*sf_n(ax),Fwfl);
}
} /* end time loop */
if(verb) fprintf(stderr,"\n");
/*------------------------------------------------------------*/
/* deallocate arrays */
free(*wfl); free(wfl);
free(wco);
free(coo);
/*------------------------------------------------------------*/
/* close files */
if (Ftrc!=NULL) sf_fileclose(Ftrc);
if (Fwfl!=NULL) sf_fileclose(Fwfl);
if (Fcoo!=NULL) sf_fileclose(Fcoo);
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,isreversed;
sf_file Fs,Fr,Fi; /* I/O files */
sf_axis az,ax,at,aa; /* cube axes */
int iz,ix,it;
int nz,nx,nt;
off_t iseek;
float **us=NULL,**ur=NULL,**ii=NULL;
float scale;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
/* OMP parameters */
#ifdef _OPENMP
omp_init();
#endif
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("isreversed",&isreversed)) isreversed=false; /* received wavefield */
Fs = sf_input ("in" );
Fr = sf_input ("ur" );
Fi = sf_output("out");
/*------------------------------------------------------------*/
/* read axes */
az=sf_iaxa(Fs,1); nz = sf_n(az);
ax=sf_iaxa(Fs,2); nx = sf_n(ax);
at=sf_iaxa(Fs,3); nt = sf_n(at);
aa=sf_maxa(1,0,1);
sf_setlabel(aa,"");
sf_setunit (aa,"");
if(verb) {
sf_raxa(az);
sf_raxa(ax);
sf_raxa(at);
}
/* write axes */
sf_oaxa(Fi,az,1);
sf_oaxa(Fi,ax,2);
sf_oaxa(Fi,aa,3);
/*------------------------------------------------------------*/
/* allocate work arrays */
ii = sf_floatalloc2(nz,nx);
us = sf_floatalloc2(nz,nx);
ur = sf_floatalloc2(nz,nx);
for (ix=0; ix<nx; ix++) {
for(iz=0; iz<nz; iz++) {
ii[ix][iz]=0.;
}
}
/*------------------------------------------------------------*/
if(isreversed) { /* receiver wavefield is reversed */
if(verb) fprintf(stderr,"nt\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b\b\b\b\b\b%04d",it);
sf_floatread(us[0],nz*nx,Fs);
sf_floatread(ur[0],nz*nx,Fr);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic) \
private(ix,iz) \
shared (ii,us,ur,nx,nz)
#endif
for (ix=0; ix<nx; ix++) {
for(iz=0; iz<nz; iz++) {
ii[ix][iz] += us[ix][iz]*ur[ix][iz];
}
}
} /* it */
if(verb) fprintf(stderr,"\n");
} else { /* receiver wavefield is NOT reversed */
if(verb) fprintf(stderr,"nt\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",(nt-it-1));
sf_floatread(us[0],nz*nx,Fs);
iseek=(off_t)(nt-1-it)*nz*nx*sizeof(float);
sf_seek(Fr,iseek,SEEK_SET);
sf_floatread(ur[0],nz*nx,Fr);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic) \
private(ix,iz) \
shared (ii,us,ur,nx,nz)
#endif
for (ix=0; ix<nx; ix++) {
for(iz=0; iz<nz; iz++) {
ii[ix][iz] += us[ix][iz]*ur[ix][iz];
}
}
} /* it */
if(verb) fprintf(stderr,"\n");
} /* end "is reversed" */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* scale image */
scale = 1./nt;
for (ix=0; ix<nx; ix++) {
for(iz=0; iz<nz; iz++) {
ii[ix][iz] *=scale;
}
}
/*------------------------------------------------------------*/
/* write image */
sf_floatwrite(ii[0],nx*nz,Fi);
/*------------------------------------------------------------*/
/* deallocate arrays */
free(*ii); free(ii);
free(*us); free(us);
free(*ur); free(ur);
/*------------------------------------------------------------*/
exit (0);
}
int main(int argc, char* argv[])
{
bool verb; /* verbosity flag */
bool abc; /* absorbing boundary conditions flag */
bool free; /* free surface flag*/
bool snap; /* wavefield snapshots flag */
int jsnap;/* save wavefield every *jsnap* time steps */
/* cube axes */
sf_axis at,az,ax,as,ar,bt;
int it,iz,ix,is,ir, iop;
int nt,nz,nx,ns,nr,nz2,nx2;
float z0,x0,dt,dx,dz, idx,idz,dt2;
/* Laplacian */
int nop=2; /* Laplacian operator size */
float c0, c1, c2; /* Laplacian operator coefficients */
float co,c1x,c2x,c1z,c2z;
int nbz,nbx; /* boundary size */
float tz, tx; /* sponge boundary decay coefficients */
float dp;
float ws; /* injected data */
/* linear interpolation */
float *fzs,*fxs, *fzr,*fxr;
int *jzs,*jxs, *jzr,*jxr;
float *ws00,*ws01,*ws10,*ws11;
float *wr00,*wr01,*wr10,*wr11;
/* boundary */
float *bzl,*bzh,*bxl,*bxh;
/* I/O files */
sf_file Fw,Fs,Fr;
float *ww; /* wavelet */
pt2d *ss, *rr; /* source/receiver locations */
float **tt; /* taper */
/* background */
sf_file Bv,Bd,Bu; /* velocity, data, wavefield */
float **bvv,**bvo; /* velocity */
float *bdd; /* data */
float **bum,**buo,**bup,**bud; /* wavefields */
/* perturbation */
sf_file Pv,Pd,Pu;
float **pvv,**pvo;
float *pdd;
float **pum,**puo,**pup,**pud;
int ompchunk; /* OpenMP data chunk size */
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
if(! sf_getint("ompchunk",&ompchunk)) ompchunk=1;
if(! sf_getbool("verb",&verb)) verb=false;
if(! sf_getbool( "abc",&abc )) abc=false;
if(! sf_getbool("snap",&snap)) snap=false;
if(! sf_getbool("free",&free)) free=false;
Fw = sf_input ("in" ); /* wavelet */
Fs = sf_input ("sou"); /* sources */
Fr = sf_input ("rec"); /* receivers */
Bv = sf_input ("vel"); /* velocity */
Bu = sf_output("wfl"); /* wavefield */
Bd = sf_output("out"); /* data */
Pv = sf_input ("ref"); /* velocity */
Pu = sf_output("liw"); /* linearized wavefield */
Pd = sf_output("lid"); /* linearized data */
/* read axes*/
at=sf_iaxa(Fw,1); sf_setlabel(at,"t");
nt=sf_n(at); dt=sf_d(at); if(verb) sf_raxa(at); /* time */
as=sf_iaxa(Fs,2); sf_setlabel(as,"s");
ns=sf_n(as); if(verb) sf_raxa(as); /* sources */
ar=sf_iaxa(Fr,2); sf_setlabel(ar,"r");
nr=sf_n(ar); if(verb) sf_raxa(ar); /* receivers */
az=sf_iaxa(Bv,1); sf_setlabel(az,"z");
nz=sf_n(az); dz=sf_d(az); if(verb) sf_raxa(az); /* depth */
ax=sf_iaxa(Bv,2); sf_setlabel(ax,"x");
nx=sf_n(ax); dx=sf_d(ax); if(verb) sf_raxa(ax); /* space */
/* configure wavefield snapshots */
if(snap) {
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
/*------------------------------------------------------------*/
/* expand domain for absorbing boundary conditions */
if(abc) {
if(! sf_getint("nbz",&nbz)) nbz=nop; if(nbz<nop) nbz=nop;
if(! sf_getint("nbx",&nbx)) nbx=nop; if(nbx<nop) nbx=nop;
if(! sf_getfloat("tz",&tz)) tz=0.025;
if(! sf_getfloat("tx",&tx)) tx=0.025;
} else {
nbz=nop;
nbx=nop;
}
/* expanded domain ( az+2 nz, ax+2 nx ) */
nz2=nz+2*nbz; z0=sf_o(az)-nbz*dz;
nx2=nx+2*nbx; x0=sf_o(ax)-nbx*dx;
sf_setn(az,nz2); sf_seto(az,z0); if(verb) sf_raxa(az);
sf_setn(ax,nx2); sf_seto(ax,x0); if(verb) sf_raxa(ax);
/*------------------------------------------------------------*/
/* setup output wavefield header */
if(snap) {
bt = sf_maxa(nt/jsnap,sf_o(at),dt*jsnap);
sf_setlabel(bt,"t");
sf_oaxa(Bu,az,1);
sf_oaxa(Bu,ax,2);
sf_oaxa(Bu,bt,3);
sf_oaxa(Pu,az,1);
sf_oaxa(Pu,ax,2);
sf_oaxa(Pu,bt,3);
}
/* setup output data header */
sf_oaxa(Bd,ar,1);
sf_oaxa(Bd,at,2);
sf_oaxa(Pd,ar,1);
sf_oaxa(Pd,at,2);
dt2 = dt*dt;
idz = 1/(dz*dz);
idx = 1/(dx*dx);
/* Laplacian coefficients */
c0=-30./12.;
c1=+16./12.;
c2=- 1./12.;
co = c0 * (idx+idz);
c1x= c1 * idx;
c2x= c2 * idx;
c1z= c1 * idz;
c2z= c2 * idz;
/*------------------------------------------------------------*/
/* allocate arrays */
ww=sf_floatalloc (nt); sf_floatread(ww ,nt ,Fw);
bvv=sf_floatalloc2(nz,nx); sf_floatread(bvv[0],nz*nx,Bv);
pvv=sf_floatalloc2(nz,nx); sf_floatread(pvv[0],nz*nx,Pv);
/* allocate source/receiver point arrays */
ss = (pt2d*) sf_alloc(ns,sizeof(*ss));
rr = (pt2d*) sf_alloc(nr,sizeof(*rr));
pt2dread1(Fs,ss,ns,3); /* read 3 elements (x,z,v) */
pt2dread1(Fr,rr,nr,2); /* read 2 elements (x,z) */
bdd=sf_floatalloc(nr);
pdd=sf_floatalloc(nr);
jzs=sf_intalloc(ns); fzs=sf_floatalloc(ns);
jzr=sf_intalloc(nr); fzr=sf_floatalloc(nr);
jxs=sf_intalloc(ns); fxs=sf_floatalloc(ns);
jxr=sf_intalloc(nr); fxr=sf_floatalloc(nr);
ws00 = sf_floatalloc(ns); wr00 = sf_floatalloc(nr);
ws01 = sf_floatalloc(ns); wr01 = sf_floatalloc(nr);
ws10 = sf_floatalloc(ns); wr10 = sf_floatalloc(nr);
ws11 = sf_floatalloc(ns); wr11 = sf_floatalloc(nr);
/*------------------------------------------------------------*/
for (is=0;is<ns;is++) {
if(ss[is].z >= z0 &&
ss[is].z < z0 + (nz2-1)*dz &&
ss[is].x >= x0 &&
ss[is].x < x0 + (nx2-1)*dx) {
jzs[is] = (int)( (ss[is].z-z0)/dz);
fzs[is] = (ss[is].z-z0)/dz - jzs[is];
jxs[is] = (int)( (ss[is].x-x0)/dx);
fxs[is] = (ss[is].x-x0)/dx - jxs[is];
} else {
jzs[is] = 0; jxs[is] = 0;
fzs[is] = 1; fxs[is] = 0;
ss[is].v= 0;
}
ws00[is] = (1-fzs[is])*(1-fxs[is]);
ws01[is] = ( fzs[is])*(1-fxs[is]);
ws10[is] = (1-fzs[is])*( fxs[is]);
ws11[is] = ( fzs[is])*( fxs[is]);
}
for (ir=0;ir<nr;ir++) {
if(rr[ir].z >= z0 &&
rr[ir].z < z0 + (nz2-1)*dz &&
rr[ir].x >= x0 &&
rr[ir].x < x0 + (nx2-1)*dx) {
jzr[ir] = (int)( (rr[ir].z-z0)/dz);
fzr[ir] = (rr[ir].z-z0)/dz - jzr[ir];
jxr[ir] = (int)( (rr[ir].x-x0)/dx);
fxr[ir] = (rr[ir].x-x0)/dx - jxr[ir];
rr[ir].v=1;
} else {
jzr[ir] = 0;
fzr[ir] = 1;
rr[ir].v= 0;
}
wr00[ir] = (1-fzr[ir])*(1-fxr[ir]);
wr01[ir] = ( fzr[ir])*(1-fxr[ir]);
wr10[ir] = (1-fzr[ir])*( fxr[ir]);
wr11[ir] = ( fzr[ir])*( fxr[ir]);
}
/*------------------------------------------------------------*/
/* allocate temporary arrays */
bum=sf_floatalloc2(nz2,nx2);
buo=sf_floatalloc2(nz2,nx2);
bup=sf_floatalloc2(nz2,nx2);
bud=sf_floatalloc2(nz2,nx2);
pum=sf_floatalloc2(nz2,nx2);
puo=sf_floatalloc2(nz2,nx2);
pup=sf_floatalloc2(nz2,nx2);
pud=sf_floatalloc2(nz2,nx2);
tt=sf_floatalloc2(nz2,nx2);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,ix) shared(nx2,nz2,bum,buo,bup,bud,pum,puo,pup,pud,tt)
#endif
for (iz=0; iz<nz2; iz++) {
for (ix=0; ix<nx2; ix++) {
bum[ix][iz]=pum[ix][iz]=0;
buo[ix][iz]=puo[ix][iz]=0;
bup[ix][iz]=pup[ix][iz]=0;
bud[ix][iz]=pud[ix][iz]=0;
tt[ix][iz]=1;
}
}
/*------------------------------------------------------------*/
/* velocity in the expanded domain (vo=vv^2)*/
bvo=sf_floatalloc2(nz2,nx2);
pvo=sf_floatalloc2(nz2,nx2);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,ix) shared(nz,nx,bvv,pvv,bvo,pvo)
#endif
for (iz=0; iz<nz; iz++) {
for (ix=0; ix<nx; ix++) {
bvo[nbx+ix][nbz+iz] = bvv[ix][iz] * bvv[ix][iz];
pvo[nbx+ix][nbz+iz] = pvv[ix][iz];
}
}
/* fill boundaries */
for (iz=0; iz<nbz; iz++) {
for (ix=0; ix<nx2; ix++) {
bvo[ix][ iz ] = bvo[ix][ nbz ];
bvo[ix][nz2-iz-1] = bvo[ix][nz2-nbz-1];
pvo[ix][ iz ] = pvo[ix][ nbz ];
pvo[ix][nz2-iz-1] = pvo[ix][nz2-nbz-1];
}
}
for (iz=0; iz<nz2; iz++) {
for (ix=0; ix<nbx; ix++) {
bvo[ ix ][iz] = bvo[ nbx ][iz];
bvo[nx2-ix-1][iz] = bvo[nx2-nbx-1][iz];
pvo[ ix ][iz] = pvo[ nbx ][iz];
pvo[nx2-ix-1][iz] = pvo[nx2-nbx-1][iz];
}
}
/*------------------------------------------------------------*/
/* free surface */
if(abc && free) {
for (iz=0; iz<nbz; iz++) {
for (ix=0; ix<nx2; ix++) {
bvo[ix][iz]=0;
pvo[ix][iz]=0;
}
}
}
/*------------------------------------------------------------*/
/* sponge ABC setup */
if(abc) {
for (iz=0; iz<nbz; iz++) {
for (ix=0; ix<nx2; ix++) {
tt[ix][ iz ] = exp( - (tz*(nbz-iz))*(tz*(nbz-iz)) );
tt[ix][nz2-iz-1] = tt[ix][iz];
}
}
for (iz=0; iz<nz2; iz++) {
for (ix=0; ix<nbx; ix++) {
tt[ ix ][iz] = exp( - (tx*(nbx-ix))*(tx*(nbx-ix)) );
tt[nx2-ix-1][iz] = tt[ix][iz];
}
}
}
/* one-way ABC setup */
bzl=sf_floatalloc(nx2);
bzh=sf_floatalloc(nx2);
bxl=sf_floatalloc(nz2);
bxh=sf_floatalloc(nz2);
for (ix=0;ix<nx2;ix++) {
dp = bvo[ix][ nop ] *dt/dz; bzl[ix] = (1-dp)/(1+dp);
dp = bvo[ix][nz2-nop-1] *dt/dz; bzh[ix] = (1-dp)/(1+dp);
}
for (iz=0;iz<nz2;iz++) {
dp = bvo[ nop ][iz] *dt/dx; bxl[iz] = (1-dp)/(1+dp);
dp = bvo[nx2-nop-1][iz] *dt/dx; bxh[iz] = (1-dp)/(1+dp);
}
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
/* 4th order Laplacian operator */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,ix) shared(nop,nx2,nz2,bud,buo,pud,puo,co,c1x,c1z,c2x,c2z,idx,idz)
#endif
for (ix=nop; ix<nx2-nop; ix++) {
for (iz=nop; iz<nz2-nop; iz++) {
bud[ix][iz] =
co * buo[ix ][iz ] +
c1x*(buo[ix-1][iz ] + buo[ix+1][iz ]) +
c2x*(buo[ix-2][iz ] + buo[ix+2][iz ]) +
c1z*(buo[ix ][iz-1] + buo[ix ][iz+1]) +
c2z*(buo[ix ][iz-2] + buo[ix ][iz+2]);
pud[ix][iz] =
co * puo[ix ][iz ] +
c1x*(puo[ix-1][iz ] + puo[ix+1][iz ]) +
c2x*(puo[ix-2][iz ] + puo[ix+2][iz ]) +
c1z*(puo[ix ][iz-1] + puo[ix ][iz+1]) +
c2z*(puo[ix ][iz-2] + puo[ix ][iz+2]);
}
}
/* inject source */
for (is=0;is<ns;is++) {
ws = ww[it] * ss[is].v;
bud[ jxs[is] ][ jzs[is] ] -= ws * ws00[is];
bud[ jxs[is] ][ jzs[is]+1] -= ws * ws01[is];
bud[ jxs[is]+1][ jzs[is] ] -= ws * ws10[is];
bud[ jxs[is]+1][ jzs[is]+1] -= ws * ws11[is];
}
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz) shared(nx2,nz2,pud,bud,pvo)
#endif
for (ix=0; ix<nx2; ix++) {
for (iz=0; iz<nz2; iz++) {
pud[ix][iz] -= bud[ix][iz] * 2*pvo[ix][iz];
}
}
/* velocity scale */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz) shared(nx2,nz2,bud,pud,bvo)
#endif
for (ix=0; ix<nx2; ix++) {
for (iz=0; iz<nz2; iz++) {
bud[ix][iz] *= bvo[ix][iz];
pud[ix][iz] *= bvo[ix][iz];
}
}
/* time step */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz) shared(nx2,nz2,bud,buo,bum,bup,pud,puo,pum,pup,dt2)
#endif
for (ix=0; ix<nx2; ix++) {
for (iz=0; iz<nz2; iz++) {
bup[ix][iz] = 2*buo[ix][iz] - bum[ix][iz] + bud[ix][iz] * dt2;
bum[ix][iz] = buo[ix][iz];
buo[ix][iz] = bup[ix][iz];
pup[ix][iz] = 2*puo[ix][iz] - pum[ix][iz] + pud[ix][iz] * dt2;
pum[ix][iz] = puo[ix][iz];
puo[ix][iz] = pup[ix][iz];
}
}
/* one-way ABC apply */
if(abc) {
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz,iop) shared(nx2,nz2,nop,buo,bum,puo,pum,bzl,bzh)
#endif
for(ix=0;ix<nx2;ix++) {
for(iop=0;iop<nop;iop++) {
iz = nop-iop;
buo [ix][iz ]
= bum[ix][iz+1]
+(bum[ix][iz ]
- buo[ix][iz+1]) * bzl[ix];
puo [ix][iz ]
= pum[ix][iz+1]
+(pum[ix][iz ]
- puo[ix][iz+1]) * bzl[ix];
iz = nz2-nop+iop-1;
buo [ix][iz ]
= bum[ix][iz-1]
+(bum[ix][iz ]
- buo[ix][iz-1]) * bzh[ix];
puo [ix][iz ]
= pum[ix][iz-1]
+(pum[ix][iz ]
- puo[ix][iz-1]) * bzh[ix];
}
}
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,1) private(ix,iz,iop) shared(nx2,nz2,nop,buo,bum,puo,pum,bzl,bzh)
#endif
for(iop=0;iop<nop;iop++) {
for(iz=0;iz<nz2;iz++) {
ix = nop-iop;
buo [ix ][iz]
= bum[ix+1][iz]
+(bum[ix ][iz]
- buo[ix+1][iz]) * bxl[iz];
puo [ix ][iz]
= pum[ix+1][iz]
+(pum[ix ][iz]
- puo[ix+1][iz]) * bxl[iz];
ix = nx2-nop+iop-1;
buo [ix ][iz]
= bum[ix-1][iz]
+(bum[ix ][iz]
- buo[ix-1][iz]) * bxh[iz];
puo [ix ][iz]
= pum[ix-1][iz]
+(pum[ix ][iz]
- puo[ix-1][iz]) * bxh[iz];
}
}
}
/* sponge ABC apply */
if(abc) {
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz) shared(nx2,nz2,buo,bum,bud,puo,pum,pud,tt)
#endif
for (ix=0; ix<nx2; ix++) {
for (iz=0; iz<nz2; iz++) {
buo[ix][iz] *= tt[ix][iz];
bum[ix][iz] *= tt[ix][iz];
bud[ix][iz] *= tt[ix][iz];
puo[ix][iz] *= tt[ix][iz];
pum[ix][iz] *= tt[ix][iz];
bud[ix][iz] *= tt[ix][iz];
}
}
}
/* write wavefield */
if(snap && it%jsnap==0) {
sf_floatwrite(buo[0],nz2*nx2,Bu);
sf_floatwrite(puo[0],nz2*nx2,Pu);
}
/* write data */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,1) private(ir) shared(bdd,pdd,rr,buo,puo,jzr,wr00,wr01,wr10,wr11)
#endif
for (ir=0;ir<nr;ir++) {
bdd[ir] =
buo[ jxr[ir] ][ jzr[ir] ] * wr00[ir] +
buo[ jxr[ir] ][ jzr[ir]+1] * wr01[ir] +
buo[ jxr[ir]+1][ jzr[ir] ] * wr10[ir] +
buo[ jxr[ir]+1][ jzr[ir]+1] * wr11[ir];
bdd[ir] *= rr[ir].v;
pdd[ir] =
puo[ jxr[ir] ][ jzr[ir] ] * wr00[ir] +
puo[ jxr[ir] ][ jzr[ir]+1] * wr01[ir] +
puo[ jxr[ir]+1][ jzr[ir] ] * wr10[ir] +
puo[ jxr[ir]+1][ jzr[ir]+1] * wr11[ir];
pdd[ir] *= rr[ir].v;
}
/* write data */
sf_floatwrite(bdd,nr,Bd);
sf_floatwrite(pdd,nr,Pd);
}
if(verb) fprintf(stderr,"\n");
exit (0);
}
int main (int argc, char *argv[])
{
bool verb; /* verbosity */
bool incore; /* in core execution */
float eps; /* dip filter constant */
int nrmax; /* number of reference velocities */
float dtmax; /* time error */
int pmx,pmy; /* padding in the k domain */
int tmx,tmy; /* boundary taper size */
bool cw; /* converted waves flag */
sf_axis az,ax,ay,aw,alx,aly;
int n,nz,nw;
sf_file Fs_s=NULL,Fs_r=NULL; /* slowness file S (nlx,nly,nz) */
sf_file Fw_s=NULL,Fw_r=NULL; /* wavefield file D or U ( nx, ny,nw) */
sf_file Fr=NULL; /* reflectivity */
fslice wfl_s=NULL,wfl_r=NULL,refl=NULL;
fslice slo_s=NULL,slo_r=NULL;
/*------------------------------------------------------------*/
sf_init(argc,argv);
/* converted waves flag */
if (NULL != sf_getstring("sls")) {
cw=true;
} else {
cw=false;
}
if (!sf_getbool("verb", &verb)) verb = true; /* verbosity flag */
if (!sf_getbool("incore",&incore))incore = false; /* in core execution */
if (!sf_getfloat("eps", &eps )) eps = 0.01; /* stability parameter */
if (!sf_getint( "nrmax",&nrmax)) nrmax = 1; /* maximum number of refs */
if (!sf_getfloat("dtmax",&dtmax)) dtmax = 0.004; /* time error */
if (!sf_getint( "pmx", &pmx )) pmx = 0; /* padding on x */
if (!sf_getint( "pmy", &pmy )) pmy = 0; /* padding on y */
if (!sf_getint( "tmx", &tmx )) tmx = 0; /* taper on x */
if (!sf_getint( "tmy", &tmy )) tmy = 0; /* taper on y */
/*------------------------------------------------------------*/
/* SLOWNESS */
; Fs_s = sf_input("slo");
if(cw) Fs_r = sf_input("sls");
alx = sf_iaxa(Fs_s,1); sf_setlabel(alx,"lx");
aly = sf_iaxa(Fs_s,2); sf_setlabel(aly,"ly");
az = sf_iaxa(Fs_s,3); sf_setlabel(az , "z");
/* test here if slo and sls have similar sizes */
n = sf_n(alx)*sf_n(aly);
nz = sf_n(az);
; slo_s = fslice_init(n,nz,sizeof(float));
if(cw) slo_r = fslice_init(n,nz,sizeof(float));
; fslice_load(Fs_s,slo_s,SF_FLOAT);
if(cw) fslice_load(Fs_r,slo_r,SF_FLOAT);
/*------------------------------------------------------------*/
/* WAVEFIELD/IMAGE */
Fw_s = sf_input ( "in");
Fw_r = sf_output("out"); sf_settype(Fw_r,SF_COMPLEX);
Fr = sf_input ("ref");
if (SF_COMPLEX !=sf_gettype(Fw_s))
sf_error("Need complex source wavefield");
ax = sf_iaxa(Fw_s,1); sf_setlabel(ax,"x"); sf_oaxa(Fw_r,ax,1);
ay = sf_iaxa(Fw_s,2); sf_setlabel(ay,"y"); sf_oaxa(Fw_r,ay,2);
aw = sf_iaxa(Fw_s,3); sf_setlabel(aw,"w"); sf_oaxa(Fw_r,aw,3);
n = sf_n(ax)*sf_n(ay);
nw = sf_n(aw);
/* slice management (temp files) */
wfl_s = fslice_init(n,nw,sizeof(sf_complex));
wfl_r = fslice_init(n,nw,sizeof(sf_complex));
refl = fslice_init(n,nz,sizeof(float));
fslice_load(Fw_s,wfl_s,SF_COMPLEX);
fslice_load(Fr, refl, SF_FLOAT);
/*------------------------------------------------------------*/
/* MODELING */
srmod_init (verb,incore,eps,dtmax,
az,aw,ax,ay,alx,aly,
tmx,tmy,pmx,pmy);
if(cw) {
srmod_cw_init (dtmax,nrmax,slo_s,slo_r);
srmod_cw (wfl_s,wfl_r,refl);
srmod_cw_close();
} else {
srmod_pw_init (dtmax,nrmax,slo_s);
srmod_pw (wfl_s,wfl_r,refl);
srmod_pw_close();
}
srmod_close();
/*------------------------------------------------------------*/
/* slice management (temp files) */
fslice_dump(Fw_r,wfl_r,SF_COMPLEX);
; fslice_close(slo_s);
if(cw) fslice_close(slo_r);
; fslice_close(wfl_s);
; fslice_close(wfl_r);
; fslice_close(refl);
exit (0);
}
int main(int argc, char* argv[])
{
bool verb;
int nx,nz,nc,ic,iz,ix;
int ind=0;
float tmp;
float dx,dz,ox,oz;
pt2d *cc=NULL;
float **eps=NULL,**del,***out=NULL;
float x,y,lambda0,lambda1,lambda2,twoA;
float lm00,lm01,lm02,lm10,lm11,lm12,lm20,lm21,lm22;
float *a=NULL,*b=NULL,**llm=NULL;
sf_axis ax,az,ac;
sf_file Fin=NULL,Fdel=NULL, Fc=NULL,Fout=NULL;
/* init RSF */
sf_init(argc,argv);
if(! sf_getbool("verb",&verb)) verb=false;
Fin = sf_input ("in" );
Fdel= sf_input ("del" );
Fout = sf_output ("out" );
Fc = sf_input ("cc" ); /* sample locations */
/* input axes */
az = sf_iaxa(Fin,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az);
ax = sf_iaxa(Fin,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax);
nz = sf_n(az); dz = sf_d(az); oz = sf_o(az);
nx = sf_n(ax); dx = sf_d(ax); ox = sf_o(ax);
eps = sf_floatalloc2(nz,nx);
del = sf_floatalloc2(nz,nx);
sf_floatread(eps[0],nz*nx,Fin);
sf_floatread(del[0],nz*nx,Fdel);
/* CIP coordinates */
ac = sf_iaxa(Fc,2); sf_setlabel(ac,"cc"); sf_setunit(ac,"");
if(verb) sf_raxa(ac);
nc = sf_n(ac);
cc= (pt2d*) sf_alloc(nc,sizeof(*cc));
pt2dread1(Fc,cc,nc,2); /* read coordinates */
/* nc=3*/
/* output files*/
out = sf_floatalloc3(nz,nx,nc);
sf_oaxa(Fout,az,1);
sf_oaxa(Fout,ax,2);
sf_oaxa(Fout,ac,3);
nc=3;
a = sf_floatalloc(nc);
b = sf_floatalloc(nc);
llm = sf_floatalloc2(2,nc);
/*find sample indexes*/
for(ic=0; ic<nc; ic++) {
b[ic]=cc[ic].z; /*delta*/
a[ic]=cc[ic].x; /*epsilon*/
sf_warning("x%d=%f,z%d=%f: epsilon=%f delta=%f",ic,cc[ic].x,ic,cc[ic].z,a[ic],b[ic]);
}
/* a[0]=0.0; b[0]=0.0;*/
/* a[2]=0.65; b[2]=0.0; */
/* a[1]=0.0; b[1]=0.35;*/
/*matrix*/
twoA=(a[0]-a[2])*(b[1]-b[2])-(a[1]-a[2])*(b[0]-b[2]);
/* if(twoA<0) { */
/* tmp=a[1];a[1]=a[2];a[2]=tmp; */
/* tmp=b[1];b[1]=b[2];b[2]=tmp; */
/* } */
sf_warning("a=%f %f %f",a[0],a[1],a[2]);
sf_warning("b=%f %f %f",b[0],b[1],b[2]);
twoA=(a[0]-a[2])*(b[1]-b[2])-(a[1]-a[2])*(b[0]-b[2]);
llm[0][0]=a[1]*b[2]-a[2]*b[1]; llm[0][1]=b[1]-b[2]; llm[0][2]=a[2]-a[1];
llm[1][0]=a[2]*b[0]-a[0]*b[2]; llm[1][1]=b[2]-b[0]; llm[1][2]=a[0]-a[2];
llm[2][0]=a[0]*b[1]-a[1]*b[0]; llm[2][1]=b[0]-b[1]; llm[2][2]=a[1]-a[0];
sf_warning("");
sf_warning("%f %f %f",llm[0][0], llm[0][1], llm[0][2]);
sf_warning("%f %f %f",llm[1][0], llm[1][1], llm[1][2]);
sf_warning("%f %f %f",llm[2][0], llm[2][1], llm[2][2]);
sf_warning("area=%f",twoA);
lm00=a[1]*b[2]-a[2]*b[1]; lm01=b[1]-b[2]; lm02=a[2]-a[1];
lm10=a[2]*b[0]-a[0]*b[2]; lm11=b[2]-b[0]; lm12=a[0]-a[2];
lm20=a[0]*b[1]-a[1]*b[0]; lm21=b[0]-b[1]; lm22=a[1]-a[0];
sf_warning("");
sf_warning("%f %f %f",lm00, lm01, lm02);
sf_warning("%f %f %f",lm10, lm11, lm12);
sf_warning("%f %f %f",lm20, lm21, lm22);
/* find shape functions */
for (ic=0; ic<nc; ic++) {
for (ix=0; ix<nx; ix++) {
for(iz=0; iz<nz; iz++) {
out[ic][ix][iz]=0.;
}
}
}
if(twoA!=0){
for (ix=0; ix<nx; ix++) {
for(iz=0; iz<nz; iz++) {
x=eps[ix][iz];
y=del[ix][iz];
lambda0=lm00 + lm01*x + lm02*y;
lambda1=lm10 + lm11*x + lm12*y;
lambda2=lm20 + lm21*x + lm22*y;
out[0][ix][iz]=lambda0/twoA;
out[1][ix][iz]=lambda1/twoA;
out[2][ix][iz]=lambda2/twoA;
}
}
}
sf_floatwrite(out[0][0],nz*nx*nc,Fout);
}
int main(int argc, char* argv[])
{
bool verb,fsrf,snap,expl;
int jsnap,ntsnap;
int jdata;
/* I/O files */
sf_file Fwav=NULL; /* wavelet */
sf_file Fsou=NULL; /* sources */
sf_file Frec=NULL; /* receivers */
sf_file Fvel=NULL; /* velocity */
sf_file Fref=NULL; /* reflectivity */
sf_file Fden=NULL; /* density */
sf_file Fdat=NULL; /* data (background) */
sf_file Fwfl=NULL; /* wavefield (background) */
sf_file Flid=NULL; /* data (scattered) */
sf_file Fliw=NULL; /* wavefield (scattered) */
/* I/O arrays */
float *ww=NULL; /* wavelet */
pt2d *ss=NULL; /* sources */
pt2d *rr=NULL; /* receivers */
float **vpin=NULL; /* velocity */
float **roin=NULL; /* density */
float **rfin=NULL; /* reflectivity */
float **vp=NULL; /* velocity in expanded domain */
float **ro=NULL; /* density in expanded domain */
float **ro1=NULL; /* normalized 1st derivative of density on axis 1 */
float **ro2=NULL; /* normalized 1st derivative of density on axis 2 */
float **rf=NULL; /* reflectivity in expanded domain */
float *bdd=NULL; /* data (background) */
float *sdd=NULL; /* data (scattered) */
float **vt=NULL; /* temporary vp*vp * dt*dt */
float **bum,**buo,**bup,**bua,**but; /* wavefield: um = U @ t-1; uo = U @ t; up = U @ t+1 */
float **sum,**suo,**sup,**sua,**sut; /* wavefield: um = U @ t-1; uo = U @ t; up = U @ t+1 */
/* cube axes */
sf_axis at,a1,a2,as,ar;
int nt,n1,n2,ns,nr,nb;
int it,i1,i2;
float dt,d1,d2,id1,id2,dt2;
/* linear interpolation weights/indices */
lint2d cs,cr;
fdm2d fdm;
abcone2d abc; /* abc */
sponge spo;
/* FD operator size */
float co,ca2,cb2,ca1,cb1;
int ompchunk;
#ifdef _OPENMP
int ompnth,ompath;
#endif
sf_axis ac1=NULL,ac2=NULL;
int nqz,nqx;
float oqz,oqx;
float dqz,dqx;
float **uc=NULL;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
if(! sf_getint("ompchunk",&ompchunk)) ompchunk=1;
/* OpenMP data chunk size */
#ifdef _OPENMP
if(! sf_getint("ompnth", &ompnth)) ompnth=0;
/* OpenMP available threads */
#pragma omp parallel
ompath=omp_get_num_threads();
if(ompnth<1) ompnth=ompath;
omp_set_num_threads(ompnth);
sf_warning("using %d threads of a total of %d",ompnth,ompath);
#endif
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("snap",&snap)) snap=false; /* wavefield snapshots flag */
if(! sf_getbool("free",&fsrf)) fsrf=false; /* free surface flag */
if(! sf_getbool("expl",&expl)) expl=false; /* "exploding reflector" */
Fwav = sf_input ("in" ); /* wavelet */
Fsou = sf_input ("sou"); /* sources */
Frec = sf_input ("rec"); /* receivers */
Fvel = sf_input ("vel"); /* velocity */
Fden = sf_input ("den"); /* density */
Fref = sf_input ("ref"); /* reflectivity */
Fwfl = sf_output("wfl"); /* wavefield */
Fdat = sf_output("out"); /* data */
Fliw = sf_output("liw"); /* wavefield (scattered) */
Flid = sf_output("lid"); /* data (scattered) */
/* axes */
at = sf_iaxa(Fwav,2); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
as = sf_iaxa(Fsou,2); sf_setlabel(as,"s"); if(verb) sf_raxa(as); /* sources */
ar = sf_iaxa(Frec,2); sf_setlabel(ar,"r"); if(verb) sf_raxa(ar); /* receivers */
a1 = sf_iaxa(Fvel,1); sf_setlabel(a1,"z"); if(verb) sf_raxa(a1); /* depth */
a2 = sf_iaxa(Fvel,2); sf_setlabel(a2,"x"); if(verb) sf_raxa(a2); /* space */
nt = sf_n(at); dt = sf_d(at);
ns = sf_n(as);
nr = sf_n(ar);
n1 = sf_n(a1); d1 = sf_d(a1);
n2 = sf_n(a2); d2 = sf_d(a2);
if(! sf_getint("jdata",&jdata)) jdata=1;
if(snap) { /* save wavefield every *jsnap* time steps */
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
/*------------------------------------------------------------*/
/* setup output data header */
sf_oaxa(Fdat,ar,1);
sf_oaxa(Flid,ar,1);
sf_setn(at,nt/jdata);
sf_setd(at,dt*jdata);
sf_oaxa(Fdat,at,2);
sf_oaxa(Flid,at,2);
/* setup output wavefield header */
if(snap) {
if(!sf_getint ("nqz",&nqz)) nqz=sf_n(a1);
if(!sf_getint ("nqx",&nqx)) nqx=sf_n(a2);
if(!sf_getfloat("oqz",&oqz)) oqz=sf_o(a1);
if(!sf_getfloat("oqx",&oqx)) oqx=sf_o(a2);
dqz=sf_d(a1);
dqx=sf_d(a2);
ac1 = sf_maxa(nqz,oqz,dqz);
ac2 = sf_maxa(nqx,oqx,dqx);
/* check if the imaging window fits in the wavefield domain */
uc=sf_floatalloc2(sf_n(ac1),sf_n(ac2));
ntsnap=0;
for(it=0; it<nt; it++) {
if(it%jsnap==0) ntsnap++;
}
sf_setn(at, ntsnap);
sf_setd(at,dt*jsnap);
if(verb) sf_raxa(at);
/* sf_setn(at,nt/jsnap);
sf_setd(at,dt*jsnap); */
sf_oaxa(Fwfl,ac1,1);
sf_oaxa(Fwfl,ac2,2);
sf_oaxa(Fwfl,at, 3);
sf_oaxa(Fliw,ac1,1);
sf_oaxa(Fliw,ac2,2);
sf_oaxa(Fliw,at, 3);
}
/*------------------------------------------------------------*/
/* expand domain for FD operators and ABC */
if( !sf_getint("nb",&nb) || nb<NOP) nb=NOP;
fdm=fdutil_init(verb,fsrf,a1,a2,nb,ompchunk);
sf_setn(a1,fdm->nzpad); sf_seto(a1,fdm->ozpad); if(verb) sf_raxa(a1);
sf_setn(a2,fdm->nxpad); sf_seto(a2,fdm->oxpad); if(verb) sf_raxa(a2);
/*------------------------------------------------------------*/
if(expl) ww = sf_floatalloc( 1);
else ww = sf_floatalloc(ns);
bdd =sf_floatalloc(nr);
sdd =sf_floatalloc(nr);
/*------------------------------------------------------------*/
/* setup source/receiver coordinates */
ss = (pt2d*) sf_alloc(ns,sizeof(*ss));
rr = (pt2d*) sf_alloc(nr,sizeof(*rr));
pt2dread1(Fsou,ss,ns,2); /* read (x,z) coordinates */
pt2dread1(Frec,rr,nr,2); /* read (x,z) coordinates */
cs = lint2d_make(ns,ss,fdm);
cr = lint2d_make(nr,rr,fdm);
/*------------------------------------------------------------*/
/* setup FD coefficients */
dt2 = dt*dt;
id1 = 1/d1;
id2 = 1/d2;
co = C0 * (id2*id2+id1*id1);
ca2= CA * id2*id2;
cb2= CB * id2*id2;
ca1= CA * id1*id1;
cb1= CB * id1*id1;
/*------------------------------------------------------------*/
/* input density */
roin=sf_floatalloc2(n1, n2 );
ro =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
ro1 =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
ro2 =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(roin[0],n1*n2,Fden);
expand(roin,ro,fdm);
/* normalized density derivatives */
for (i2=NOP; i2<fdm->nxpad-NOP; i2++) {
for(i1=NOP; i1<fdm->nzpad-NOP; i1++) {
ro1[i2][i1] = D1(ro,i2,i1,id1) / ro[i2][i1];
ro2[i2][i1] = D2(ro,i2,i1,id2) / ro[i2][i1];
}
}
free(*roin); free(roin);
/*------------------------------------------------------------*/
/* input velocity */
vpin=sf_floatalloc2(n1, n2 );
vp =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
vt =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(vpin[0],n1*n2,Fvel);
expand(vpin,vp,fdm);
free(*vpin); free(vpin);
/*------------------------------------------------------------*/
/* input reflectivity */
rfin=sf_floatalloc2(n1, n2 );
rf =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(rfin[0],n1*n2,Fref);
expand(rfin,rf,fdm);
free(*rfin); free(rfin);
for (i2=0; i2<fdm->nxpad; i2++) {
for(i1=0; i1<fdm->nzpad; i1++) {
vt[i2][i1] = vp[i2][i1] * vp[i2][i1] * dt2;
}
}
/* free surface */
if(fsrf) {
for (i2=0; i2<fdm->nxpad; i2++) {
for(i1=0; i1<fdm->nb; i1++) {
vt[i2][i1]=0;
}
}
}
/*------------------------------------------------------------*/
/* allocate wavefield arrays */
bum=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
buo=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
bup=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
bua=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sum=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
suo=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sup=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sua=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
for (i2=0; i2<fdm->nxpad; i2++) {
for(i1=0; i1<fdm->nzpad; i1++) {
bum[i2][i1]=0;
buo[i2][i1]=0;
bup[i2][i1]=0;
bua[i2][i1]=0;
sum[i2][i1]=0;
suo[i2][i1]=0;
sup[i2][i1]=0;
sua[i2][i1]=0;
}
}
/*------------------------------------------------------------*/
/* one-way abc setup */
abc = abcone2d_make(NOP,dt,vp,fsrf,fdm);
/* sponge abc setup */
spo = sponge_make(fdm->nb);
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,fdm->ompchunk) private(i2,i1) shared(fdm,bua,buo,sua,suo,co,ca2,ca1,cb2,cb1,id2,id1)
#endif
for (i2=NOP; i2<fdm->nxpad-NOP; i2++) {
for(i1=NOP; i1<fdm->nzpad-NOP; i1++) {
/* 4th order Laplacian operator */
bua[i2][i1] =
co * buo[i2 ][i1 ] +
ca2*(buo[i2-1][i1 ] + buo[i2+1][i1 ]) +
cb2*(buo[i2-2][i1 ] + buo[i2+2][i1 ]) +
ca1*(buo[i2 ][i1-1] + buo[i2 ][i1+1]) +
cb1*(buo[i2 ][i1-2] + buo[i2 ][i1+2]);
sua[i2][i1] =
co * suo[i2 ][i1 ] +
ca2*(suo[i2-1][i1 ] + suo[i2+1][i1 ]) +
cb2*(suo[i2-2][i1 ] + suo[i2+2][i1 ]) +
ca1*(suo[i2 ][i1-1] + suo[i2 ][i1+1]) +
cb1*(suo[i2 ][i1-2] + suo[i2 ][i1+2]);
/* density term */
bua[i2][i1] -= (
D1(buo,i2,i1,id1) * ro1[i2][i1] +
D2(buo,i2,i1,id2) * ro2[i2][i1] );
sua[i2][i1] -= (
D1(suo,i2,i1,id1) * ro1[i2][i1] +
D2(suo,i2,i1,id2) * ro2[i2][i1] );
}
}
/* inject acceleration source */
if(expl) {
sf_floatread(ww, 1,Fwav);
lint2d_inject1(bua,ww[0],cs);
} else {
sf_floatread(ww,ns,Fwav);
lint2d_inject(bua,ww,cs);
}
/* single scattering */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(i2,i1) shared(fdm,buo,sua,rf)
#endif
for (i2=0; i2<fdm->nxpad; i2++) {
for (i1=0; i1<fdm->nzpad; i1++) {
sua[i2][i1] -= bua[i2][i1] * 2*rf[i2][i1];
}
}
/* step forward in time */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,fdm->ompchunk) private(i2,i1) shared(fdm,bua,buo,bum,bup,sua,suo,sum,sup,vt,dt2)
#endif
for (i2=0; i2<fdm->nxpad; i2++) {
for(i1=0; i1<fdm->nzpad; i1++) {
bup[i2][i1] = 2*buo[i2][i1]
- bum[i2][i1]
+ bua[i2][i1] * vt[i2][i1];
sup[i2][i1] = 2*suo[i2][i1]
- sum[i2][i1]
+ sua[i2][i1] * vt[i2][i1];
}
}
/* circulate wavefield arrays */
but=bum;
bum=buo;
buo=bup;
bup=but;
sut=sum;
sum=suo;
suo=sup;
sup=sut;
/* one-way abc apply*/
abcone2d_apply(buo,bum,NOP,abc,fdm);
sponge2d_apply(bum, spo,fdm);
sponge2d_apply(buo, spo,fdm);
abcone2d_apply(suo,sum,NOP,abc,fdm);
sponge2d_apply(sum, spo,fdm);
sponge2d_apply(suo, spo,fdm);
/* extract data at receivers */
lint2d_extract(buo,bdd,cr);
lint2d_extract(suo,sdd,cr);
if( it%jdata==0) {
sf_floatwrite(bdd,nr,Fdat);
sf_floatwrite(sdd,nr,Flid);
}
/* extract wavefield in the "box" */
if(snap && it%jsnap==0) {
cut2d(buo,uc,fdm,ac1,ac2);
sf_floatwrite(uc[0],sf_n(ac1)*sf_n(ac2),Fwfl);
cut2d(suo,uc,fdm,ac1,ac2);
sf_floatwrite(uc[0],sf_n(ac1)*sf_n(ac2),Fliw);
}
}
if(verb) fprintf(stderr,"\n");
exit (0);
}
int main (int argc, char *argv[])
{
int adj; /* forward or adjoint */
int eic; /* EIC or CIC */
bool verb; /* verbosity */
float eps; /* dip filter constant */
int nrmax; /* number of reference velocities */
float dtmax; /* time error */
int pmx,pmy; /* padding in the k domain */
int tmx,tmy; /* boundary taper size */
int nhx, nhy, nhz, nht, nc;
int nhx2,nhy2,nhz2,nht2;
float dht, oht;
sf_axis amx,amy,az;
sf_axis alx,aly;
sf_axis aw,ae,ac,aa;
sf_axis ahx,ahy,ahz,aht;
/* I/O files */
sf_file Bws=NULL; /* background wavefield file Bws */
sf_file Bwr=NULL; /* background wavefield file Bwr */
sf_file Bs=NULL; /* background slowness file Bs */
sf_file Ps=NULL; /* slowness perturbation file Ps */
sf_file Pi=NULL; /* image perturbation file Pi */
sf_file Fc=NULL; /* CIP coordinates */
sf_file Pws=NULL; /* perturbed wavefield file Pws */
sf_file Pwr=NULL; /* perturbed wavefield file Pwr */
sf_file Pti=NULL;
int ompnth=1;
wexcub3d cub; /* wavefield hypercube */
wexcip3d cip; /* CIP gathers */
wextap3d tap; /* tapering */
wexssr3d ssr; /* SSR operator */
wexlsr3d lsr; /* LSR operator */
wexslo3d slo; /* slowness */
wexmvaop3d mva;
float dsmax;
/*------------------------------------------------------------*/
sf_init(argc,argv);
/* OMP parameters */
#ifdef _OPENMP
ompnth=omp_init();
#endif
if (!sf_getbool( "verb",&verb )) verb = true; /* verbosity flag */
if (!sf_getint( "adj",&adj )) sf_error("Specify adjoint!"); /* y=ADJ Back-projection; n=FWD Forward Scattering */
if (!sf_getint( "feic",&eic )) sf_error("Specify EIC!"); /* extended I.C. flag */
if (!sf_getfloat( "eps",&eps )) eps = 0.01; /* stability parameter */
if (!sf_getint( "nrmax",&nrmax)) nrmax = 1; /* max number of refs */
if (!sf_getfloat("dtmax",&dtmax)) dtmax = 0.004; /* max time error */
if (!sf_getint( "pmx",&pmx )) pmx = 0; /* padding on x */
if (!sf_getint( "pmy",&pmy )) pmy = 0; /* padding on y */
if (!sf_getint( "tmx",&tmx )) tmx = 0; /* taper on x */
if (!sf_getint( "tmy",&tmy )) tmy = 0; /* taper on y */
ae = sf_maxa(1,0,1);
nhx=nhy=nhz=nht=nc=nhx2=nhy2=nhz2=nht2=0;
oht = dht = 0.0;
/*------------------------------------------------------------*/
/* slowness */
Bs = sf_input("slo");
alx = sf_iaxa(Bs,1); sf_setlabel(alx,"lx");
aly = sf_iaxa(Bs,2); sf_setlabel(aly,"ly");
az = sf_iaxa(Bs,3); sf_setlabel(az, "z");
/*------------------------------------------------------------*/
/* input file */
if(adj)
Pi = sf_input("in");
else
Ps = sf_input("in");
/*------------------------------------------------------------*/
/* wavefield */
Bws = sf_input("swfl");
Bwr = sf_input("rwfl");
amx = sf_iaxa(Bws,1); sf_setlabel(amx,"mx");
amy = sf_iaxa(Bws,2); sf_setlabel(amy,"my");
aw = sf_iaxa(Bws,4); sf_setlabel(aw ,"w" );
Pws = sf_tmpfile(NULL); sf_settype(Pws,SF_COMPLEX);
Pwr = sf_tmpfile(NULL); sf_settype(Pwr,SF_COMPLEX);
/*------------------------------------------------------------*/
cub = wex_cube(verb,
amx,amy,az,
alx,aly,
aw,
ae,
eps,
ompnth);
dsmax = dtmax/cub->az.d;
/*------------------------------------------------------------*/
/* init structures */
tap = wextap_init(cub->amx.n,
cub->amy.n,
1,
SF_MIN(tmx,cub->amx.n-1), /* tmx */
SF_MIN(tmy,cub->amy.n-1), /* tmy */
0,
true,true,false);
slo = wexslo_init(cub,Bs,nrmax,dsmax);
ssr = wexssr_init(cub,slo,pmx,pmy,tmx,tmy,dsmax);
lsr = wexlsr_init(cub,pmx,pmy,dsmax);
/*------------------------------------------------------------*/
Pti = sf_tmpfile(NULL); sf_settype(Pti,SF_COMPLEX);
/*------------------------------------------------------------*/
/* WEMVA */
if(adj) {
sf_warning("adjoint operator...");
if(eic){
ahx = sf_iaxa(Pi,1); sf_setlabel(ahx,"hx");
ahy = sf_iaxa(Pi,2); sf_setlabel(ahy,"hy");
ahz = sf_iaxa(Pi,3); sf_setlabel(ahz,"hz");
aht = sf_iaxa(Pi,4); sf_setlabel(aht,"ht");
dht = sf_d(aht); oht = sf_o(aht);
nhx2 = sf_n(ahx); nhx = (nhx2-1)/2;
nhy2 = sf_n(ahy); nhy = (nhy2-1)/2;
nhz2 = sf_n(ahz); nhz = (nhz2-1)/2;
nht2 = sf_n(aht); nht = (nht2-1)/2;
/* CIP coordinates */
Fc = sf_input ("cc" );
ac = sf_iaxa(Fc,2); sf_setlabel(ac,"cc"); sf_setunit(ac,"");
nc = sf_n(ac);
}
cip = wexcip_init(cub,nhx,nhy,nhz,nht,nhx2,nhy2,nhz2,nht2,nc,dht,oht,Fc,eic);
mva = wexmva_init(cub,cip);
Ps = sf_output("out"); sf_settype(Ps,SF_COMPLEX);
sf_oaxa(Ps,amx,1);
sf_oaxa(Ps,amy,2);
sf_oaxa(Ps,az, 3);
if(eic){
sf_oaxa(Ps,ae, 4);
sf_oaxa(Ps,ae, 5);}
/* Adjoint I.C. operator, dI -> dW */
wexcip_adj(cub,cip,Bwr,Pws,Pi,eic,1,1); /* Ws dR */
wexcip_adj(cub,cip,Bws,Pwr,Pi,eic,0,0); /* Wr dR */
sf_filefresh(Pws);
sf_filefresh(Pwr);
/* Adjoint WEMVA operator, dW -> dS */
wexmva(mva,adj,cub,ssr,lsr,tap,slo,Bws,Bwr,Pws,Pwr,Ps);
} else {
/* set up the I/O of output CIP gathers */
Pi = sf_output("out"); sf_settype(Pi,SF_COMPLEX);
if(eic){
/* CIP coordinates */
Fc = sf_input ("cc" );
ac = sf_iaxa(Fc,2); sf_setlabel(ac,"cc"); sf_setunit(ac,"");
nc = sf_n(ac);
if(! sf_getint("nhx",&nhx)) nhx=0; /* number of lags on the x axis */
if(! sf_getint("nhy",&nhy)) nhy=0; /* number of lags on the y axis */
if(! sf_getint("nhz",&nhz)) nhz=0; /* number of lags on the z axis */
if(! sf_getint("nht",&nht)) nht=0; /* number of lags on the t axis */
if(! sf_getfloat("dht",&dht)) sf_error("need dht");
oht = -nht*dht;
nhx2=2*nhx+1; nhy2=2*nhy+1;
nhz2=2*nhz+1; nht2=2*nht+1;
aa=sf_maxa(nhx2,-nhx*cub->amx.d,cub->amx.d);
sf_setlabel(aa,"hx"); sf_setunit(aa,"");
if(verb) sf_raxa(aa);
sf_oaxa(Pi,aa,1);
aa=sf_maxa(nhy2,-nhy*cub->amy.d,cub->amy.d);
sf_setlabel(aa,"hy"); sf_setunit(aa,"");
if(verb) sf_raxa(aa);
sf_oaxa(Pi,aa,2);
aa=sf_maxa(nhz2,-nhz*cub->az.d,cub->az.d);
sf_setlabel(aa,"hz"); sf_setunit(aa,"");
if(verb) sf_raxa(aa);
sf_oaxa(Pi,aa,3);
aa=sf_maxa(nht2,-nht*dht,dht);
sf_setlabel(aa,"ht"); sf_setunit(aa,"s");
if(verb) sf_raxa(aa);
sf_oaxa(Pi,aa,4);
sf_oaxa(Pi,ac,5);
}
else{
sf_oaxa(Pi,amx,1);
sf_oaxa(Pi,amy,2);
sf_oaxa(Pi,az, 3);
}
cip = wexcip_init(cub,nhx,nhy,nhz,nht,nhx2,nhy2,nhz2,nht2,nc,dht,oht,Fc,eic);
mva = wexmva_init(cub,cip);
/* WEMVA operator, dS -> dW */
wexmva(mva,adj,cub,ssr,lsr,tap,slo,Bws,Bwr,Pws,Pwr,Ps);
sf_filefresh(Pws);
sf_filefresh(Pwr);
/* I.C. operator, dW -> dI */
wexcip_for(cub,cip,Bws,Pwr,Pti,eic,0,0); /* CONJ( Ws) dWr */
sf_seek(Pti,(off_t)0,SEEK_SET);
wexcip_for(cub,cip,Pws,Bwr,Pti,eic,0,1); /* CONJ(dWs) Wr */
sf_filefresh(Pti);
sf_filecopy(Pi,Pti,SF_COMPLEX);
}
/*------------------------------------------------------------*/
/* close structures */
wexslo_close(slo);
wexssr_close(cub,ssr);
wextap2D_close(tap);
wexmva_close(mva);
wexcip_close(cip,eic);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* close files */
if (Ps!=NULL) sf_fileclose(Ps);
if (Fc!=NULL) sf_fileclose(Fc);
if (Pi!=NULL) sf_fileclose(Pi);
if (Bws!=NULL) sf_fileclose(Bws);
if (Bwr!=NULL) sf_fileclose(Bwr);
if (Pws!=NULL) sf_tmpfileclose(Pws);
if (Pwr!=NULL) sf_tmpfileclose(Pwr);
if (Pti!=NULL) sf_tmpfileclose(Pti);
/*------------------------------------------------------------*/
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,conj,twin,pandq,Gtot,Htot;
/* OMP parameters */
#ifdef _OPENMP
int ompnth;
#endif
float *pplus0, *pplus, *pplusinv, *pplustemp, *Pplus, *Pplus_trace, *pminus, *Pminus, *Refl, *Gp, *Gm, *G, *H;
float *qplus, *qplusinv, *qplustemp, *Qplus, *Qplus_trace, *qminus, *Qminus;
float *window, *taper, pi;
int *tw;
/* I/O files */
sf_file Fplus;
sf_file FRefl;
sf_file FGp;
sf_file FGm;
sf_file FG;
sf_file FH;
sf_file Ftwin;
sf_file Fp;
sf_file Fq;
char *filename1, filename2[256], filename3[256];
/* Cube axes */
sf_axis at,af,ax;
int nt,nf,ntr,mode,nshots,niter,len;
int i,it,ix,ishot,iter,i0;
int twc, twa, shift, n[2], rect[2], s[2];
float scale,eps,dt,df,dx,ot,of,a,b,c,d,e,f;
sf_triangle tr;
/*------------------------------------------------------------*/
/* Initialize RSF parameters */
/*------------------------------------------------------------*/
sf_init(argc,argv);
/*------------------------------------------------------------*/
/* Initialize OMP parameters */
/*------------------------------------------------------------*/
#ifdef _OPENMP
ompnth=omp_init();
#endif
/*------------------------------------------------------------*/
/* Flags */
/*------------------------------------------------------------*/
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("conj",&conj)) conj=false; /* complex conjugation (time-reversal) flag */
if(! sf_getbool("twin",&twin)) twin=false; /* returns the timewindow as one of the outputs */
if(! sf_getbool("pandq",&pandq)) pandq=false; /* pandq=true: returns p and q */
if(! sf_getbool("Gtot",&Gtot)) Gtot=false; /* Gtot=true: returns G=Gp+Gm */
if(! sf_getbool("Htot",&Htot)) Htot=false; /* Htot=true: returns H=Gp-Gm */
if(! sf_getint("niter",&niter)) niter=1; /* number of iterations */
if(! sf_getint("nshots",&nshots)) nshots=1; /* number of shots */
if(! sf_getfloat("scale",&scale)) scale=1.0; /* scale factor */
if(! sf_getfloat("eps",&eps)) eps=1e-4; /* threshold for the timewindow */
if(! sf_getint("shift",&shift)) shift=5; /* shift in samples for the timewindow */
if (verb) {
fprintf(stderr,"This program was called with \"%s\".\n",argv[0]);
/*fprintf(stderr,"Nr: %d Nx: %d Nt:%d\n",nr,nx,nt);*/
if (argc > 1) {
for (i = 1; i<argc; i++) {
fprintf(stderr,"argv[%d] = %s\n", i, argv[i]);
}
}
else {
fprintf(stderr,"The command had no other arguments.\n");
}
}
/*------------------------------------------------------------*/
/* I/O files */
/*------------------------------------------------------------*/
/* "in" is the transposed version of p00plus_xxxx_xxxx.rsf
Dimensions of p00plus_xxxx_xxxx.rsf BEFORE sftransp: n1=ntr,n2=nt
Dimensions of p00plus_xxxx_xxxx.rsf BEFORE sftransp: n1=nt,n2=ntr */
Fplus = sf_input("in");
/* refl is REFL_000.rsf
It is used to read nf, df, of
Dimensions are: n1=nf,n2=ntr */
/*FRefl = (sf_file)sf_alloc(1,sizeof(sf_file));*/
FRefl = sf_input("refl");
FGp = sf_output("out");
FGm = sf_output("Gm");
if (Gtot) {
FG = sf_output("G");
}
if (Htot) {
FH = sf_output("H");
}
if (pandq) {
Fp = sf_output("p");
Fq = sf_output("q");
}
if (twin) {
Ftwin = sf_output("window"); /* time window */
}
/*------------------------------------------------------------*/
/* Axes */
/*------------------------------------------------------------*/
at = sf_iaxa(Fplus,1); sf_setlabel(at,"Time"); if(verb) sf_raxa(at); /* time */
af = sf_iaxa(FRefl,1); sf_setlabel(af,"Frequency"); if(verb) sf_raxa(af); /* frequency */
ax = sf_iaxa(Fplus,2); sf_setlabel(ax,"r"); if(verb) sf_raxa(ax); /* space */
nt = sf_n(at); dt = sf_d(at); ot = sf_o(at);
nf = sf_n(af); df = sf_d(af); of = sf_o(af);
ntr = sf_n(ax); dx = sf_d(ax);
if (verb) fprintf(stderr,"nt: %d nf: %d ntr:%d\n",nt,nf,ntr);
sf_fileclose(FRefl);
/*------------------------------------------------------------*/
/* Setup output data and wavefield header */
/*------------------------------------------------------------*/
sf_oaxa(FGp,at,1);
sf_oaxa(FGp,ax,2);
sf_oaxa(FGm,at,1);
sf_oaxa(FGm,ax,2);
if (Gtot) {
sf_oaxa(FG,at,1);
sf_oaxa(FG,ax,2);
}
if (Htot) {
sf_oaxa(FH,at,1);
sf_oaxa(FH,ax,2);
}
if (pandq) {
sf_oaxa(Fp,at,1);
sf_oaxa(Fp,ax,2);
sf_oaxa(Fq,at,1);
sf_oaxa(Fq,ax,2);
}
if (twin) {
sf_oaxa(Ftwin,at,1);
sf_oaxa(Ftwin,ax,2);
}
/*------------------------------------------------------------*/
/* Allocate arrays */
/*------------------------------------------------------------*/
/* Downgoing wavefields - Time */
pplus0 = (float *)calloc(nt*ntr,sizeof(float));
sf_floatread(pplus0,nt*ntr,Fplus);
pplus = (float *)calloc(nt*ntr,sizeof(float));
memcpy(pplus,pplus0,nt*ntr*sizeof(float));
pplustemp = (float *)calloc(nt*ntr,sizeof(float));
pplusinv = (float *)calloc(nt*ntr,sizeof(float));
qplus = (float *)calloc(nt*ntr,sizeof(float));
qplustemp = (float *)calloc(nt*ntr,sizeof(float));
/* Downgoing wavefields - Frequency */
Pplus = (float *)calloc(2*nf*ntr,sizeof(float));
Qplus = (float *)calloc(2*nf*ntr,sizeof(float));
/* The three flags of fft1 are: inv, sym, and opt */
fft1(pplus0,Pplus,Fplus,0,0,1);
memcpy(Qplus,Pplus,2*nf*ntr*sizeof(float));
/* Upgoing wavefields - Time */
pminus = (float *)calloc(nt*ntr,sizeof(float));
qminus = (float *)calloc(nt*ntr,sizeof(float));
/* Downgoing wavefields - Frequency */
Pminus = (float *)calloc(2*nf*ntr,sizeof(float));
Qminus = (float *)calloc(2*nf*ntr,sizeof(float));
/* This is currently NOT used */
/* Transpose of p00plus_xxxx_xxxx */
for (ix=0; ix<ntr; ix++) {
for (it=0; it<nt; it++) {
pplusinv[ix*ntr+it]=pplus0[it*ntr+ix];
}
}
/* Single trace (in frequency) of the downgoing wavefield */
Pplus_trace = (float *)calloc(2*nf,sizeof(float));
Qplus_trace = (float *)calloc(2*nf,sizeof(float));
/* Output wavefields */
Gp = (float *)calloc(nt*ntr,sizeof(float));
Gm = (float *)calloc(nt*ntr,sizeof(float));
if (Gtot) {
G = (float *)calloc(nt*ntr,sizeof(float));
}
if (Htot) {
H = (float *)calloc(nt*ntr,sizeof(float));
}
/* Time-reversal flag */
if (conj) {
mode = -1;
}
else {
mode = +1;
}
/* Load the reflection response into the memory */
if (verb) fprintf(stderr,"Before loading R %d\n",2*nf*ntr);
Refl = (float *)calloc(2*nf*ntr*nshots,sizeof(float));
/* Read REFL_000.rsf */
filename1 = sf_getstring("refl");
/* 000.rsf are 7 characters */
len = strlen(filename1)-7;
/* copy the filename without 000.rsf */
strncpy(filename2,filename1,len);
filename2[len] = '\0';
if (verb) fprintf(stderr,"filename2 is: %s and len is: %d\n",filename2,len);
/*if (NULL == filename1) {
fprintf(stderr,"Cannot read header file %s",filename1);
}*/
for (ishot=0; ishot<nshots; ishot++) {
/* write xxx.rsf in the string filename3 */
sprintf(filename3,"%03d.rsf",ishot);
for (i=0; i<7; i++)
filename2[len+i] = filename3[i];
filename2[len+7] = '\0';
if (verb) fprintf(stderr,"Loading %s in memory\n",filename2);
FRefl = sf_input(filename2);
sf_floatread(&Refl[ishot*2*nf*ntr],2*nf*ntr,FRefl);
sf_fileclose(FRefl);
/*if (verb) fprintf(stderr,"Iteration %d\n",ishot);*/
}
/* Build time-window */
tw = (int *)calloc(ntr,sizeof(int));
window = (float *)calloc(nt*ntr,sizeof(float));
/*memset(window,0,nt*ntr*sizeof(float));*/
/* I am not sure why I set it to this value */
/*for (ix=0; ix<ntr; ix++) {
tw[ix] = nt*dt+ot+0.15;
}*/
if (verb) fprintf(stderr,"Build the time-window\n");
for (ix=0; ix<ntr; ix++) {
for (it=0; it<nt; it++) {
if (pplus0[it+ix*nt]>eps) {
/*tw[ix] = it*dt+ot;*/
tw[ix] = it;
/*if (verb) fprintf(stderr,"%d %d\n",ix,it);*/
break;
}
}
}
for (ix=0; ix<ntr; ix++) {
twc = (int)(tw[ix]-shift);
twa = (int)(-twc+shift+nt);
/*if (verb) fprintf(stderr,"%d %d\n",twc,twa);*/
for (it=0; it<nt; it++) {
if ((it<twc) || (it>twa)) {
window[it+ix*nt] = 1.0;
}
}
}
/* Smoothing of the window */
/* Should I implement flags for rect and iter? */
/* Look at Msmooth.c to understand below */
n[0] = nt;
n[1] = ntr;
s[0] = 1;
s[1] = nt;
rect[0] = 5;
rect[1] = 5;
for (ix=0; ix <= 1; ix++) {
if (rect[ix] <= 1) continue;
tr = sf_triangle_init (rect[ix],n[ix],false);
for (it=0; it < (nt*ntr/n[ix]); it++) {
i0 = sf_first_index (ix,it,1+1,n,s);
for (iter=0; iter < 2; iter++) {
sf_smooth2 (tr,i0,s[ix],false,window);
}
}
sf_triangle_close(tr);
}
/* Tapering */
pi = 4.0*atan(1.0);
/*fprintf(stderr,"pi: %f\n",pi);
fprintf(stderr,"ntr: %d\n",ntr);*/
taper = (float *)calloc(ntr,sizeof(float));
memset(taper,0,ntr*sizeof(float));
for (ix=0; ix<151; ix++) {
taper[ix] = (float)(0.5*(1.0-cos(2.0*pi*(ix-0.0)/300)));
taper[ntr-ix-1] = taper[ix];
}
/*for (ix=(ntr-1); ix>(701-151-1); ix--) {
taper[ix] = (float)(0.5*(1.0-cos(2.0*pi*(ix-0.0)/300)));
}*/
for (ix=151; ix<(ntr-151); ix++) {
taper[ix] = 1.0;
}
/*for (ix=0; ix<ntr; ix++) {
fprintf(stderr,"taper[%d]: %f\n",ix,taper[ix]);
}*/
FRefl = sf_input("refl");
/*------------------------------------------------------------*/
/* Loop over iterations */
/*------------------------------------------------------------*/
if (verb) fprintf(stderr,"Beginning of loop over iterations\n");
for (iter=0; iter<niter; iter++) {
/* Set Pminus and Qminus to 0 */
memset(Pminus,0,2*nf*ntr*sizeof(float));
memset(Qminus,0,2*nf*ntr*sizeof(float));
/*------------------------------------------------------------*/
/* Loop over shot positions */
/*------------------------------------------------------------*/
if (verb) fprintf(stderr,"Beginning of loop over shot positions\n");
for (ishot=0; ishot<nshots; ishot++) {
/* Loop over receivers (traces) */
#ifdef _OPENMP
#pragma omp parallel for private(ix,it,a,b,c,d,e,f) \
shared(Pminus,Qminus,Pplus,Qplus,taper,Refl)
#endif
for (ix=0; ix<ntr; ix++) {
/* Loop over frequencies */
#pragma ivdep
for (it=0; it<2*nf; it=it+2) {
/*(x + yi)(u + vi) = (xu - yv) + (xv + yu)i*/
a = Refl[ix*2*nf+it+ishot*2*nf*ntr]*taper[ishot];
b = Refl[ix*2*nf+it+1+ishot*2*nf*ntr]*taper[ishot];
c = Pplus[ishot*2*nf+it];
d = Pplus[ishot*2*nf+it+1];
e = Qplus[ishot*2*nf+it];
f = Qplus[ishot*2*nf+it+1];
Pminus[ix*2*nf+it] += a*c - mode*b*d;
Pminus[ix*2*nf+it+1] += mode*a*d + b*c;
Qminus[ix*2*nf+it] += a*e - mode*b*f;
Qminus[ix*2*nf+it+1] += mode*a*f + b*e;
} /* End of loop over frequencies */
} /* End of loop over receivers (traces) */
if (verb) if(ishot%50==0) fprintf(stderr,"Trace %d\n",ishot);
} /* End of loop over shot positions */
/* Save a copy of pplus and qplus before creating their next iteration */
memcpy(pplustemp,pplus,nt*ntr*sizeof(float));
memcpy(qplustemp,qplus,nt*ntr*sizeof(float));
/* Build the next iteration of Pplus and Qplus */
fft1(Pminus,pminus,FRefl,1,0,1);
fft1(Qminus,qminus,FRefl,1,0,1);
if (verb) fprintf(stderr,"Build the next iteration of pplus and qplus\n");
#ifdef _OPENMP
#pragma omp parallel for private(ix,it) \
shared(pminus,qminus,pplus,qplus,pplus0,window)
#endif
for (ix=0; ix<ntr; ix++) {
#pragma ivdep
for (it=0; it<nt; it++) {
pplus[it+ix*nt] = pplus0[it+ix*nt] - scale*window[it+ix*nt]*pminus[it+ix*nt];
qplus[it+ix*nt] = pplus0[it+ix*nt] + scale*window[it+ix*nt]*qminus[it+ix*nt];
}
}
fft1(pplus,Pplus,Fplus,0,0,1);
fft1(qplus,Qplus,Fplus,0,0,1);
if (verb) fprintf(stderr,"%d %d\n",ix,it);
if(iter%10==0) fprintf(stderr,"Iteration %d\n",iter);
} /* End of loop over iterations */
/* Build Gp and Gm */
if (verb) fprintf(stderr,"Build Gp and Gm\n");
#ifdef _OPENMP
#pragma omp parallel for private(ix,it) \
shared(Gp,Gm,G,H,pminus,qminus,pplustemp,qplustemp,pplus0)
#endif
for (ix=0; ix<ntr; ix++) {
#pragma ivdep
for (it=0; it<nt; it++) {
Gp[it+ix*nt] = 0.5*( pplustemp[it+ix*nt] + scale*pminus[it+ix*nt] + qplustemp[it+ix*nt] - scale*qminus[it+ix*nt] );
Gm[it+ix*nt] = 0.5*( pplustemp[it+ix*nt] + scale*pminus[it+ix*nt] - qplustemp[it+ix*nt] + scale*qminus[it+ix*nt] );
if (Gtot) {
G[it+ix*nt] = pplustemp[it+ix*nt] + scale*pminus[it+ix*nt];
}
if (Htot) {
H[it+ix*nt] = qplustemp[it+ix*nt] - scale*qminus[it+ix*nt];
}
/*p[it+ix*nt] = 1.0*( pplus[it+ix*nt] + scale*pminus[it+ix*nt] );
q[it+ix*nt] = 1.0*( qplus[it+ix*nt] - scale*qminus[it+ix*nt] );*/
}
}
/* Write the final result */
/*FRefl = sf_input(argv[1]);*/
/*fft1(Gp,,FRefl,1,0,0);
fft1(Gm,,FRefl,1,0,0);*/
sf_floatwrite(Gp,nt*ntr,FGp);
sf_floatwrite(Gm,nt*ntr,FGm);
if (Gtot) {
sf_floatwrite(G,nt*ntr,FG);
sf_fileclose(FG);
free(G);
}
if (Htot) {
sf_floatwrite(H,nt*ntr,FH);
sf_fileclose(FH);
free(H);
}
if (pandq) {
sf_floatwrite(pplustemp,nt*ntr,Fp);
sf_floatwrite(pminus,nt*ntr,Fq);
sf_fileclose(Fp);
sf_fileclose(Fq);
}
if (twin) {
sf_floatwrite(window,nt*ntr,Ftwin);
sf_fileclose(Ftwin);
}
sf_fileclose(Fplus);
sf_fileclose(FRefl);
sf_fileclose(FGp);
sf_fileclose(FGm);
free(Gp);
free(Gm);
free(pplus);
free(pplusinv);
free(pplustemp);
free(Pplus);
free(Pplus_trace);
free(Pminus);
free(qplus);
free(qplustemp);
free(Qplus);
free(Qplus_trace);
free(Qminus);
free(Refl);
free(window);
free(tw);
free(filename1);
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,fsrf,snap,ssou,dabc,opot;
int jsnap,ntsnap,jdata;
/* I/O files */
sf_file Fwav=NULL; /* wavelet */
sf_file Fsou=NULL; /* sources */
sf_file Frec=NULL; /* receivers */
sf_file Fccc=NULL; /* velocity */
sf_file Fden=NULL; /* density */
sf_file Fdat=NULL; /* data */
sf_file Fwfl=NULL; /* wavefield */
/* cube axes */
sf_axis at,ax,ay,az;
sf_axis as,ar,ac;
int nt,nz,nx,ny,ns,nr,nc,nb;
int it,iz,ix,iy;
float dt,dz,dx,dy,idz,idx,idy;
/* FDM structure */
fdm3d fdm=NULL;
abcone3d /* abcp=NULL, */ abcs=NULL;
sponge spo=NULL;
/* I/O arrays */
float***ww=NULL; /* wavelet */
pt3d *ss=NULL; /* sources */
pt3d *rr=NULL; /* receivers */
float **dd=NULL; /* data */
/*------------------------------------------------------------*/
float ***tt=NULL;
float ***ro=NULL; /* density */
/* orthorombic footprint - 9 coefficients */
/* c11 c12 c13
. c22 c23
. . c33
c44
c55
c66 */
float ***c11=NULL;
float ***c22=NULL;
float ***c33=NULL;
float ***c44=NULL;
float ***c55=NULL;
float ***c66=NULL;
float ***c12=NULL;
float ***c13=NULL;
float ***c23=NULL;
float ***vp,***vs;
float ***qp=NULL,***qsx=NULL,***qsy=NULL,***qsz=NULL;
/*------------------------------------------------------------*/
/* displacement: um = U @ t-1; uo = U @ t; up = U @ t+1 */
float ***umz,***uoz,***upz,***uaz,***utz;
float ***umx,***uox,***upx,***uax,***utx;
float ***umy,***uoy,***upy,***uay,***uty;
/* stress/strain tensor */
float ***tzz,***txx,***tyy,***txy,***tyz,***tzx;
float szz, sxx, syy, sxy, syz, szx;
/*------------------------------------------------------------*/
/* linear interpolation weights/indices */
lint3d cs,cr;
/* Gaussian bell */
int nbell;
/* wavefield cut params */
sf_axis acz=NULL,acx=NULL,acy=NULL;
int nqz,nqx,nqy;
float oqz,oqx,oqy;
float dqz,dqx,dqy;
float ***uc=NULL;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
/*------------------------------------------------------------*/
/* OMP parameters */
#ifdef _OPENMP
omp_init();
#endif
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* execution flags */
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("snap",&snap)) snap=false; /* wavefield snapshots flag */
if(! sf_getbool("free",&fsrf)) fsrf=false; /* free surface flag */
if(! sf_getbool("ssou",&ssou)) ssou=false; /* stress source */
if(! sf_getbool("dabc",&dabc)) dabc=false; /* absorbing BC */
if(! sf_getbool("opot",&opot)) opot=false; /* output potentials */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* I/O files */
Fwav = sf_input ("in" ); /* wavelet */
Fccc = sf_input ("ccc"); /* stiffness */
Fden = sf_input ("den"); /* density */
Fsou = sf_input ("sou"); /* sources */
Frec = sf_input ("rec"); /* receivers */
Fwfl = sf_output("wfl"); /* wavefield */
Fdat = sf_output("out"); /* data */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* axes */
at = sf_iaxa(Fwav,3); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
az = sf_iaxa(Fccc,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax = sf_iaxa(Fccc,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* space x */
ay = sf_iaxa(Fccc,3); sf_setlabel(ay,"y"); if(verb) sf_raxa(ay); /* space y */
as = sf_iaxa(Fsou,2); sf_setlabel(as,"s"); if(verb) sf_raxa(as); /* sources */
ar = sf_iaxa(Frec,2); sf_setlabel(ar,"r"); if(verb) sf_raxa(ar); /* receivers */
nt = sf_n(at); dt = sf_d(at);
nz = sf_n(az); dz = sf_d(az);
nx = sf_n(ax); dx = sf_d(ax);
ny = sf_n(ay); dy = sf_d(ay);
ns = sf_n(as);
nr = sf_n(ar);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* other execution parameters */
if(! sf_getint("nbell",&nbell)) nbell=5; /* bell size */
if(verb) sf_warning("nbell=%d",nbell);
if(! sf_getint("jdata",&jdata)) jdata=1;
if(snap) { /* save wavefield every *jsnap* time steps */
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* expand domain for FD operators and ABC */
if( !sf_getint("nb",&nb) || nb<NOP) nb=NOP;
fdm=fdutil3d_init(verb,fsrf,az,ax,ay,nb,1);
fdbell3d_init(nbell);
sf_setn(az,fdm->nzpad); sf_seto(az,fdm->ozpad); if(verb) sf_raxa(az);
sf_setn(ax,fdm->nxpad); sf_seto(ax,fdm->oxpad); if(verb) sf_raxa(ax);
sf_setn(ay,fdm->nypad); sf_seto(ay,fdm->oypad); if(verb) sf_raxa(ay);
/*------------------------------------------------------------*/
/* 3D vector components */
nc=3;
if(opot) {
ac=sf_maxa(nc+1,0,1);
} else {
ac=sf_maxa(nc ,0,1);
}
/*------------------------------------------------------------*/
/* setup output data header */
sf_oaxa(Fdat,ar,1);
sf_oaxa(Fdat,ac,2);
sf_setn(at,nt/jdata);
sf_setd(at,dt*jdata);
sf_oaxa(Fdat,at,3);
/* setup output wavefield header */
if(snap) {
if(!sf_getint ("nqz",&nqz)) nqz=sf_n(az);
if(!sf_getint ("nqx",&nqx)) nqx=sf_n(ax);
if(!sf_getint ("nqy",&nqy)) nqy=sf_n(ay);
if(!sf_getfloat("oqz",&oqz)) oqz=sf_o(az);
if(!sf_getfloat("oqx",&oqx)) oqx=sf_o(ax);
if(!sf_getfloat("oqy",&oqy)) oqy=sf_o(ay);
dqz=sf_d(az);
dqx=sf_d(ax);
dqy=sf_d(ay);
acz = sf_maxa(nqz,oqz,dqz); sf_raxa(acz);
acx = sf_maxa(nqx,oqx,dqx); sf_raxa(acx);
acy = sf_maxa(nqy,oqy,dqy); sf_raxa(acy);
/* TODO: check if the imaging window fits in the wavefield domain */
uc=sf_floatalloc3(sf_n(acz),sf_n(acx),sf_n(acy));
ntsnap=0;
for(it=0; it<nt; it++) {
if(it%jsnap==0) ntsnap++;
}
sf_setn(at, ntsnap);
sf_setd(at,dt*jsnap);
if(verb) sf_raxa(at);
sf_oaxa(Fwfl,acz,1);
sf_oaxa(Fwfl,acx,2);
sf_oaxa(Fwfl,acy,3);
sf_oaxa(Fwfl,ac, 4);
sf_oaxa(Fwfl,at, 5);
}
/*------------------------------------------------------------*/
/* source array */
ww=sf_floatalloc3(ns,nc,nt);
sf_floatread(ww[0][0],nt*nc*ns,Fwav);
/* data array */
if(opot) {
dd=sf_floatalloc2(nr,nc+1);
} else {
dd=sf_floatalloc2(nr,nc );
}
/*------------------------------------------------------------*/
/* setup source/receiver coordinates */
ss = (pt3d*) sf_alloc(ns,sizeof(*ss));
rr = (pt3d*) sf_alloc(nr,sizeof(*rr));
pt3dread1(Fsou,ss,ns,3); /* read (x,y,z) coordinates */
pt3dread1(Frec,rr,nr,3); /* read (x,y,z) coordinates */
cs = lint3d_make(ns,ss,fdm);
cr = lint3d_make(nr,rr,fdm);
/*------------------------------------------------------------*/
/* setup FD coefficients */
/* idz = 2/dz;*/
/* idx = 2/dx;*/
/* idy = 2/dy;*/
idz = 1/dz;
idx = 1/dx;
idy = 1/dy;
/*------------------------------------------------------------*/
tt = sf_floatalloc3(nz,nx,ny);
ro =sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c11=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c22=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c33=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c44=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c55=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c66=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c12=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c13=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
c23=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
/* input density */
sf_floatread(tt[0][0],nz*nx*ny,Fden); expand3d(tt,ro ,fdm);
/* input stiffness */
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c11,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c22,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c33,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c44,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c55,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c66,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c12,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c13,fdm);
sf_floatread(tt[0][0],nz*nx*ny,Fccc ); expand3d(tt,c23,fdm);
free(**tt); free(*tt); free(tt);
/*------------------------------------------------------------*/
if(dabc) {
/* one-way abc setup */
vp = sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
vs = sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
vp[iy][ix][iz] = sqrt( c11[iy][ix][iz]/ro[iy][ix][iz] );
vs[iy][ix][iz] = sqrt( c55[iy][ix][iz]/ro[iy][ix][iz] );
}
}
}
/* abcp = abcone3d_make(NOP,dt,vp,fsrf,fdm); */
abcs = abcone3d_make(NOP,dt,vs,fsrf,fdm);
free(**vp); free(*vp); free(vp);
free(**vs); free(*vs); free(vs);
/* sponge abc setup */
spo = sponge_make(fdm->nb);
}
/*------------------------------------------------------------*/
/* precompute 1/ro * dt^2 */
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
ro[iy][ix][iz] = dt*dt/ro[iy][ix][iz];
}
}
}
/*------------------------------------------------------------*/
/* allocate wavefield arrays */
umz=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uoz=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
upz=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uaz=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
umx=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uox=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
upx=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uax=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
umy=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uoy=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
upy=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uay=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
tzz=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
tyy=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
txx=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
txy=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
tyz=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
tzx=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
umz[iy][ix][iz]=0; umx[iy][ix][iz]=0; umy[iy][ix][iz]=0;
uoz[iy][ix][iz]=0; uox[iy][ix][iz]=0; uoy[iy][ix][iz]=0;
upz[iy][ix][iz]=0; upx[iy][ix][iz]=0; upy[iy][ix][iz]=0;
uaz[iy][ix][iz]=0; uax[iy][ix][iz]=0; uay[iy][ix][iz]=0;
}
}
}
if(opot) {
qp =sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
qsx=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
qsy=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
qsz=sf_floatalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
}
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
/*------------------------------------------------------------*/
/* from displacement to strain */
/*------------------------------------------------------------*/
/*
* exx = Fx(ux)
* eyy = Fy(uy)
* ezz = Fz(uz)
* exy = By(ux) + Bx(uy)
* eyz = Bz(uy) + By(uz)
* ezx = Bx(uz) + Bz(ux)
*/
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iy,iz) \
shared(fdm,txx,tyy,tzz,txy,tyz,tzx,uox,uoy,uoz,idx,idy,idz)
#endif
for (iy=NOP; iy<fdm->nypad-NOP; iy++) {
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
txx[iy][ix][iz] = Dx(uox,ix,iy,iz,idx);
tyy[iy][ix][iz] = Dy(uoy,ix,iy,iz,idy);
tzz[iy][ix][iz] = Dz(uoz,ix,iy,iz,idz);
txy[iy][ix][iz] = Dy(uox,ix,iy,iz,idy) + Dx(uoy,ix,iy,iz,idx);
tyz[iy][ix][iz] = Dz(uoy,ix,iy,iz,idz) + Dy(uoz,ix,iy,iz,idy);
tzx[iy][ix][iz] = Dx(uoz,ix,iy,iz,idx) + Dz(uox,ix,iy,iz,idz);
}
}
}
/*------------------------------------------------------------*/
/* from strain to stress */
/*------------------------------------------------------------*/
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iy,iz,sxx,syy,szz,sxy,syz,szx) \
shared(fdm,txx,tyy,tzz,txy,tyz,tzx,c11,c22,c33,c44,c55,c66,c12,c13,c23)
#endif
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
sxx = c11[iy][ix][iz] * txx[iy][ix][iz]
+ c12[iy][ix][iz] * tyy[iy][ix][iz]
+ c13[iy][ix][iz] * tzz[iy][ix][iz];
syy = c12[iy][ix][iz] * txx[iy][ix][iz]
+ c22[iy][ix][iz] * tyy[iy][ix][iz]
+ c23[iy][ix][iz] * tzz[iy][ix][iz];
szz = c13[iy][ix][iz] * txx[iy][ix][iz]
+ c23[iy][ix][iz] * tyy[iy][ix][iz]
+ c33[iy][ix][iz] * tzz[iy][ix][iz];
sxy = c66[iy][ix][iz] * txy[iy][ix][iz];
syz = c44[iy][ix][iz] * tyz[iy][ix][iz];
szx = c55[iy][ix][iz] * tzx[iy][ix][iz];
txx[iy][ix][iz] = sxx;
tyy[iy][ix][iz] = syy;
tzz[iy][ix][iz] = szz;
txy[iy][ix][iz] = sxy;
tyz[iy][ix][iz] = syz;
tzx[iy][ix][iz] = szx;
}
}
}
/*------------------------------------------------------------*/
/* free surface */
/*------------------------------------------------------------*/
if(fsrf) {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iy,iz) \
shared(fdm,txx,tyy,tzz,txy,tyz,tzx)
#endif
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nb; iz++) {
txx[iy][ix][iz]=0;
tyy[iy][ix][iz]=0;
tzz[iy][ix][iz]=0;
txy[iy][ix][iz]=0;
tyz[iy][ix][iz]=0;
tzx[iy][ix][iz]=0;
}
}
}
}
/*------------------------------------------------------------*/
/* inject stress source */
/*------------------------------------------------------------*/
if(ssou) {
lint3d_bell(tzz,ww[it][0],cs);
lint3d_bell(txx,ww[it][1],cs);
lint3d_bell(tyy,ww[it][2],cs);
}
/*------------------------------------------------------------*/
/* from stress to acceleration */
/*------------------------------------------------------------*/
/*
* ax = Bx(txx) + Fy(txy) + Fz(txz)
* ay = Fx(txy) + By(tyy) + Fz(tyz)
* az = Fx(txz) + Fy(tyz) + Bz(tzz)
*/
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iy,iz) \
shared(fdm,txx,tyy,tzz,txy,tyz,tzx,uax,uay,uaz,idx,idy,idz)
#endif
for (iy=NOP; iy<fdm->nypad-NOP; iy++) {
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
uax[iy][ix][iz] = Dx( txx,ix,iy,iz,idx ) + Dy( txy,ix,iy,iz,idy ) + Dz( tzx,ix,iy,iz,idz ) ;
uay[iy][ix][iz] = Dx( txy,ix,iy,iz,idx ) + Dy( tyy,ix,iy,iz,idy ) + Dz( tyz,ix,iy,iz,idz ) ;
uaz[iy][ix][iz] = Dx( tzx,ix,iy,iz,idx ) + Dy( tyz,ix,iy,iz,idy ) + Dz( tzz,ix,iy,iz,idz ) ;
}
}
}
/*------------------------------------------------------------*/
/* inject acceleration source */
/*------------------------------------------------------------*/
if(!ssou) {
lint3d_bell(uaz,ww[it][0],cs);
lint3d_bell(uax,ww[it][1],cs);
lint3d_bell(uay,ww[it][2],cs);
}
/*------------------------------------------------------------*/
/* step forward in time */
/*------------------------------------------------------------*/
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iy,iz) \
shared(fdm,uox,uoy,uoz,umx,umy,umz,upx,upy,upz,uax,uay,uaz,ro)
#endif
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
upx[iy][ix][iz] = 2*uox[iy][ix][iz]
- umx[iy][ix][iz]
+ uax[iy][ix][iz] * ro[iy][ix][iz];
upy[iy][ix][iz] = 2*uoy[iy][ix][iz]
- umy[iy][ix][iz]
+ uay[iy][ix][iz] * ro[iy][ix][iz];
upz[iy][ix][iz] = 2*uoz[iy][ix][iz]
- umz[iy][ix][iz]
+ uaz[iy][ix][iz] * ro[iy][ix][iz];
}
}
}
/* circulate wavefield arrays */
utz=umz; uty=umy; utx=umx;
umz=uoz; umy=uoy; umx=uox;
uoz=upz; uoy=upy; uox=upx;
upz=utz; upy=uty; upx=utx;
if(dabc) {
/* one-way ABC */
/* abcone3d_apply(uoz,umz,NOP,abcp,fdm); */
/* abcone3d_apply(uox,umx,NOP,abcp,fdm); */
/* abcone3d_apply(uoy,umy,NOP,abcp,fdm); */
abcone3d_apply(uoz,umz,NOP,abcs,fdm);
abcone3d_apply(uox,umx,NOP,abcs,fdm);
abcone3d_apply(uoy,umy,NOP,abcs,fdm);
/* sponge ABC */
sponge3d_apply(umz,spo,fdm);
sponge3d_apply(uoz,spo,fdm);
sponge3d_apply(umx,spo,fdm);
sponge3d_apply(uox,spo,fdm);
sponge3d_apply(umy,spo,fdm);
sponge3d_apply(uoy,spo,fdm);
}
/*------------------------------------------------------------*/
/* cut wavefield and save */
/*------------------------------------------------------------*/
if(opot) {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iy,iz) \
shared(fdm,uox,uoy,uoz,idx,idy,idz)
#endif
for (iy=NOP; iy<fdm->nypad-NOP; iy++) {
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
qp [iy][ix][iz] = Dx( uox,ix,iy,iz,idx )
+ Dy( uoy,ix,iy,iz,idy )
+ Dz( uoz,ix,iy,iz,idz );
qsx[iy][ix][iz] = Dy( uoz,ix,iy,iz,idy ) - Dz( uoy,ix,iy,iz,idz );
qsy[iy][ix][iz] = Dz( uox,ix,iy,iz,idz ) - Dx( uoz,ix,iy,iz,idx );
qsz[iy][ix][iz] = Dx( uoy,ix,iy,iz,idx ) - Dy( uox,ix,iy,iz,idy );
}
}
}
if(snap && it%jsnap==0) {
cut3d(qp ,uc,fdm,acz,acx,acy);
sf_floatwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfl);
cut3d(qsz,uc,fdm,acz,acx,acy);
sf_floatwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfl);
cut3d(qsx,uc,fdm,acz,acx,acy);
sf_floatwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfl);
cut3d(qsy,uc,fdm,acz,acx,acy);
sf_floatwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfl);
}
lint3d_extract(qp , dd[0],cr);
lint3d_extract(qsx, dd[1],cr);
lint3d_extract(qsy, dd[2],cr);
lint3d_extract(qsz, dd[3],cr);
if(it%jdata==0) sf_floatwrite(dd[0],nr*(nc+1),Fdat);
} else {
if(snap && it%jsnap==0) {
cut3d(uoz,uc,fdm,acz,acx,acy);
sf_floatwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfl);
cut3d(uox,uc,fdm,acz,acx,acy);
sf_floatwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfl);
cut3d(uoy,uc,fdm,acz,acx,acy);
sf_floatwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfl);
}
lint3d_extract(uoz,dd[0],cr);
lint3d_extract(uox,dd[1],cr);
lint3d_extract(uoy,dd[2],cr);
if(it%jdata==0) sf_floatwrite(dd[0],nr*nc,Fdat);
}
}
if(verb) fprintf(stderr,"\n");
/*------------------------------------------------------------*/
/* deallocate arrays */
free(**ww); free(*ww); free(ww);
free(ss);
free(rr);
free(*dd); free(dd);
free(**ro); free(*ro); free(ro);
free(**c11); free(*c11); free(c11);
free(**c22); free(*c22); free(c22);
free(**c33); free(*c33); free(c33);
free(**c44); free(*c44); free(c44);
free(**c55); free(*c55); free(c55);
free(**c66); free(*c66); free(c66);
free(**c12); free(*c12); free(c12);
free(**c13); free(*c13); free(c13);
free(**c23); free(*c23); free(c23);
free(**umz); free(*umz); free(umz);
free(**uoz); free(*uoz); free(uoz);
free(**upz); free(*upz); free(upz);
free(**uaz); free(*uaz); free(uaz);
free(**umx); free(*umx); free(umx);
free(**uox); free(*uox); free(uox);
free(**upx); free(*upx); free(upx);
free(**uax); free(*uax); free(uax);
free(**umy); free(*umy); free(umy);
free(**uoy); free(*uoy); free(uoy);
free(**upy); free(*upy); free(upy);
free(**uay); free(*uay); free(uay);
free(**tzz); free(*tzz); free(tzz);
free(**txx); free(*txx); free(txx);
free(**tyy); free(*tyy); free(tyy);
free(**txy); free(*txy); free(txy);
free(**tyz); free(*tyz); free(tyz);
free(**tzx); free(*tzx); free(tzx);
if (snap) {
free(**uc); free(*uc); free(uc);
}
if(opot) {
free(**qp); free(*qp); free(qp);
free(**qsx); free(*qsx); free(qsx);
free(**qsy); free(*qsy); free(qsy);
free(**qsz); free(*qsz); free(qsz);
}
/*------------------------------------------------------------*/
exit (0);
}
int main(int argc, char* argv[])
{
bool verb;
int pick; /* method for selecting multi-arrival times */
int fill; /* hole-filling parameter */
int scaleray;
int nray,jray,iray;
sf_axis az,ax,ay; /* Cartesian coordinates */
int iz,ix,iy;
sf_axis at; /* time */
int it;
float xsou,ysou,zsou; /* source coordinates */
/* shooting directions */
float gmin,gmax,g;
float hmin,hmax,h;
sf_file Fv; /* velocity file */
sf_file Ft; /* traveltime file */
float ***vv=NULL; /* velocity cube */
float ***tt=NULL,t; /* traveltime cube */
float ***ll=NULL,l; /* ray length cube */
pt3d Tm,To,Tp;
vc3d TmTo; /* Tm-To vector */
int seed;
int n;
float o,d;
/*------------------------------------------------------------*/
sf_init(argc,argv);
if(! sf_getbool( "verb",&verb )) verb=false;
if(! sf_getint ( "pick",&pick )) pick=2;
if(! sf_getint ( "fill",&fill )) fill=1;
if(! sf_getint ("scaleray",&scaleray)) scaleray=1.;
if(! sf_getint ( "nray",&nray )) nray=1;
if(! sf_getint ( "jray",&jray )) jray=1;
if(! sf_getfloat("gmin",&gmin)) gmin=-90;
if(! sf_getfloat("gmax",&gmax)) gmax=+90;
if(! sf_getfloat("hmin",&hmin)) hmin=0;
if(! sf_getfloat("hmax",&hmax)) hmax=180;
if(verb) sf_warning("gmin=%g gmax=%g",gmin,gmax);
if(verb) sf_warning("hmin=%g hmax=%g",hmin,hmax);
/* time axis */
if(! sf_getint ("nt",&n)) n=100;
if(! sf_getfloat("ot",&o)) o=0;
if(! sf_getfloat("dt",&d)) d=0.001;
at=sf_maxa(n,o,d);
sf_setlabel(at,"t");
/* velocity file */
Fv = sf_input ("in");
az=sf_iaxa(Fv,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az);
ax=sf_iaxa(Fv,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax);
ay=sf_iaxa(Fv,3); sf_setlabel(ay,"y"); if(verb) sf_raxa(ay);
vv=sf_floatalloc3(sf_n(az),sf_n(ax),sf_n(ay));
sf_floatread(vv[0][0],sf_n(az)*sf_n(ax)*sf_n(ay),Fv);
/* traveltime file */
Ft = sf_output("out");
sf_oaxa(Ft,az,1);
sf_oaxa(Ft,ax,2);
sf_oaxa(Ft,ay,3);
tt=sf_floatalloc3(sf_n(az),sf_n(ax),sf_n(ay));
ll=sf_floatalloc3(sf_n(az),sf_n(ax),sf_n(ay));
for(iy=0;iy<sf_n(ay);iy++) {
for(ix=0;ix<sf_n(ax);ix++) {
for(iz=0;iz<sf_n(az);iz++) {
tt[iy][ix][iz] = MISSING;
ll[iy][ix][iz] = MISSING;
}
}
}
/* source location */
if(! sf_getfloat("xsou",&xsou)) xsou=sf_o(ax) + sf_n(ax)*sf_d(ax)/2;
if(! sf_getfloat("ysou",&ysou)) ysou=sf_o(ay) + sf_n(ay)*sf_d(ay)/2;
if(! sf_getfloat("zsou",&zsou)) zsou=sf_o(az) + sf_n(az)*sf_d(az)/2;
if(verb) sf_warning("xsou=%f ysou=%f zsou=%f",xsou,ysou,zsou);
/*------------------------------------------------------------*/
/* init random numbers */
if(! sf_getint("seed",&seed)) seed = time(NULL); /* random seed */
init_genrand((unsigned long) seed);
/*------------------------------------------------------------*/
/* init HWT */
hwt3d_rand(az,ax,ay,at);
/*------------------------------------------------------------*/
/* LOOP over rays */
for(iray=0; iray<nray; iray++) {
if(verb && iray%jray == 0) sf_warning("iray=%d of %d",iray,nray);
/* init ray */
g = gmin + genrand_real1() * (gmax-gmin);
h = hmin + genrand_real1() * (hmax-hmin);
g *= SF_PI/180;
h *= SF_PI/180;
/* trace ray */
l = 0;
t = 0;
Tm.x = xsou;
Tm.y = ysou;
Tm.z = zsou;
Tm.v = hwt3d_getv(vv,Tm);
if (pick==2) hwt3d_lint(tt,ll,Tm,t,l);
else if(pick==1) hwt3d_tint(tt,ll,Tm,t,l);
else hwt3d_nint(tt,ll,Tm,t,l);
it=1;
t = sf_o(at) + it * sf_d(at);
To.x = Tm.x + Tm.v*sf_d(at) * sin(g)*cos(h);
To.y = Tm.y + Tm.v*sf_d(at) * sin(g)*sin(h);
To.z = Tm.z + Tm.v*sf_d(at) * cos(g);
To.v = hwt3d_getv(vv,To);
TmTo = vec3d(&Tm,&To);
l += len3d(&TmTo);
if (pick==2) hwt3d_lint(tt,ll,To,t,l);
else if(pick==1) hwt3d_tint(tt,ll,To,t,l);
else hwt3d_nint(tt,ll,To,t,l);
for(it=2; it<sf_n(at); it++) {
t = sf_o(at) + it * sf_d(at);
Tp = hwt3d_raytr(vv,Tm,To,scaleray);
Tm = To;
To = Tp;
TmTo = vec3d(&Tm,&To);
l += len3d(&TmTo);
if (pick==2) hwt3d_lint(tt,ll,To,t,l);
else if(pick==1) hwt3d_tint(tt,ll,To,t,l);
else hwt3d_nint(tt,ll,To,t,l);
} /* end it */
} /* end iray */
/* fill holes */
if(fill>0) hwt3d_fill(tt,fill);
/* write traveltime cube */
sf_floatwrite(tt[0][0],sf_n(az)*sf_n(ax)*sf_n(ay),Ft);
/*------------------------------------------------------------*/
free(**vv); free(*vv); free(vv);
free(**tt); free(*tt); free(tt);
free(**ll); free(*ll); free(ll);
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,fsrf,snap,expl,dabc,sout,uses;
int jsnap,ntsnap,jdata;
char *atype;
#ifdef _OPENMP
int ompnth=1;
#endif
/* I/O files */
sf_file Fwav=NULL; /* wavelet */
sf_file Fsou=NULL; /* sources */
sf_file Frec=NULL; /* receivers */
sf_file Fvel=NULL; /* velocity */
sf_file Fang=NULL; /* angles */
sf_file Fdat=NULL; /* data */
sf_file Fwfl=NULL; /* wavefield */
/* cube axes */
sf_axis at,az,ax;
sf_axis as,ar;
int nt,nz,nx,ns,nr,nb;
int it,iz,ix;
float dt,dz,dx,dt2;
/* FDM structure */
fdm2d fdm=NULL;
abcone2d abc=NULL;
sponge spo=NULL;
/* I/O arrays */
float *ww=NULL; /* wavelet */
pt2d *ss=NULL; /* sources */
pt2d *rr=NULL; /* receivers */
float *dd=NULL; /* data */
float **tt=NULL;
float **vp=NULL; /* velocity */
float **vpn=NULL;
float **vpz=NULL;
float **vpx=NULL;
float **vsz=NULL;
float **tht=NULL,**sit=NULL,**cot=NULL;
float st,ct;
float **pm=NULL,**po=NULL,**pp=NULL,**pa=NULL,**pt=NULL; /* main wavefield */
float **qm=NULL,**qo=NULL,**qp=NULL,**qa=NULL,**qt=NULL; /* auxiliary wavefield */
float **sf=NULL; /* "stress" field */
/* linear inteppolation weights/indices */
lint2d cs,cr;
/* FD operator size */
float cox,cax,cbx,c1x,c2x;
float coz,caz,cbz,c1z,c2z;
/* wavefield cut params */
sf_axis acz=NULL,acx=NULL;
int nqz,nqx;
float oqz,oqx;
float dqz,dqx;
float **pc=NULL;
float H1p,H2p,H1q,H2q;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
/* select anisotropy model */
if (NULL == (atype = sf_getstring("atype"))) atype = "i";
switch(atype[0]) {
case 't':
sf_warning("TTI model");
break;
case 'v':
sf_warning("VTI model");
break;
case 'i':
default:
sf_warning("ISO model");
break;
}
/*------------------------------------------------------------*/
/* OMP parameters */
#ifdef _OPENMP
ompnth=omp_init();
#endif
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity */
if(! sf_getbool("snap",&snap)) snap=false; /* wavefield snapshots */
if(! sf_getbool("free",&fsrf)) fsrf=false; /* free surface */
if(! sf_getbool("expl",&expl)) expl=false; /* "exploding reflector" */
if(! sf_getbool("dabc",&dabc)) dabc=false; /* absorbing BC */
if(! sf_getbool("sout",&sout)) sout=false; /* stress output */
if(! sf_getbool("uses",&uses)) uses=false; /* use vsz */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* I/O files */
Fwav = sf_input ("in" ); /* wavelet */
Fvel = sf_input ("vel"); /* velocity */
Fsou = sf_input ("sou"); /* sources */
Frec = sf_input ("rec"); /* receivers */
Fang = sf_input ("ang"); /* angles */
Fwfl = sf_output("wfl"); /* wavefield */
Fdat = sf_output("out"); /* data */
/*------------------------------------------------------------*/
/* axes */
at = sf_iaxa(Fwav,2); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
az = sf_iaxa(Fvel,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax = sf_iaxa(Fvel,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* space */
as = sf_iaxa(Fsou,2); sf_setlabel(as,"s"); if(verb) sf_raxa(as); /* sources */
ar = sf_iaxa(Frec,2); sf_setlabel(ar,"r"); if(verb) sf_raxa(ar); /* receivers */
nt = sf_n(at); dt = sf_d(at);
nz = sf_n(az); dz = sf_d(az);
nx = sf_n(ax); dx = sf_d(ax);
ns = sf_n(as);
nr = sf_n(ar);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* other execution parameters */
if(! sf_getint("jdata",&jdata)) jdata=1;
if(snap) { /* save wavefield every *jsnap* time steps */
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* setup output data header */
sf_oaxa(Fdat,ar,1);
sf_setn(at,nt/jdata);
sf_setd(at,dt*jdata);
sf_oaxa(Fdat,at,2);
/* setup output wavefield header */
if(snap) {
if(!sf_getint ("nqz",&nqz)) nqz=sf_n(az);
if(!sf_getint ("nqx",&nqx)) nqx=sf_n(ax);
if(!sf_getfloat("oqz",&oqz)) oqz=sf_o(az);
if(!sf_getfloat("oqx",&oqx)) oqx=sf_o(ax);
dqz=sf_d(az);
dqx=sf_d(ax);
acz = sf_maxa(nqz,oqz,dqz); sf_raxa(acz);
acx = sf_maxa(nqx,oqx,dqx); sf_raxa(acx);
/* check if the imaging window fits in the wavefield domain */
pc=sf_floatalloc2(sf_n(acz),sf_n(acx));
ntsnap=0;
for(it=0; it<nt; it++) {
if(it%jsnap==0) ntsnap++;
}
sf_setn(at, ntsnap);
sf_setd(at,dt*jsnap);
if(verb) sf_raxa(at);
sf_oaxa(Fwfl,acz,1);
sf_oaxa(Fwfl,acx,2);
sf_oaxa(Fwfl,at, 3);
}
/*------------------------------------------------------------*/
/* expand domain for FD operators and ABC */
if( !sf_getint("nb",&nb) || nb<NOP) nb=NOP;
fdm=fdutil_init(verb,fsrf,az,ax,nb,1);
sf_setn(az,fdm->nzpad); sf_seto(az,fdm->ozpad); if(verb) sf_raxa(az);
sf_setn(ax,fdm->nxpad); sf_seto(ax,fdm->oxpad); if(verb) sf_raxa(ax);
/*------------------------------------------------------------*/
if(expl) {
ww = sf_floatalloc( 1);
} else {
ww = sf_floatalloc(ns);
}
dd = sf_floatalloc(nr);
/*------------------------------------------------------------*/
/* setup source/receiver coordinates */
ss = (pt2d*) sf_alloc(ns,sizeof(*ss));
rr = (pt2d*) sf_alloc(nr,sizeof(*rr));
pt2dread1(Fsou,ss,ns,2); /* read (x,z) coordinates */
pt2dread1(Frec,rr,nr,2); /* read (x,z) coordinates */
cs = lint2d_make(ns,ss,fdm);
cr = lint2d_make(nr,rr,fdm);
/*------------------------------------------------------------*/
/* setup FD coefficients */
cox = C0 / (dx*dx);
cax = CA / (dx*dx);
cbx = CB / (dx*dx);
c1x = C1 / dx;
c2x = C2 / dx;
coz = C0 / (dz*dz);
caz = CA / (dz*dz);
cbz = CB / (dz*dz);
c1z = C1 / dz;
c2z = C2 / dz;
/* precompute dt^2*/
dt2 = dt*dt;
/*------------------------------------------------------------*/
tt = sf_floatalloc2(nz,nx);
/*------------------------------------------------------------*/
/* input velocity */
vp =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
vpz =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(tt[0],nz*nx,Fvel );
expand(tt,vpz,fdm); /* VPz */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
vp [ix][iz] = vpz[ix][iz];
vpz[ix][iz] = vpz[ix][iz] * vpz[ix][iz];
}
}
if(fsrf) { /* free surface */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nb; iz++) {
vpz[ix][iz]=0;
}
}
}
if(atype[0] != 'i') {
vpn =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(tt[0],nz*nx,Fvel );
expand(tt,vpn,fdm); /* VPn */
vpx =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(tt[0],nz*nx,Fvel );
expand(tt,vpx,fdm); /* VPx */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
vpn[ix][iz] = vpn[ix][iz] * vpn[ix][iz];
vpx[ix][iz] = vpx[ix][iz] * vpx[ix][iz];
}
}
if(fsrf) { /* free surface */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nb; iz++) {
vpn[ix][iz]=0;
vpx[ix][iz]=0;
}
}
}
if(uses) {
vsz =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(tt[0],nz*nx,Fvel );
expand(tt,vsz,fdm); /* VSz */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
vsz[ix][iz] = vsz[ix][iz] * vsz[ix][iz];
}
}
}
}
/*------------------------------------------------------------*/
if( atype[0]=='t') {
/* input tilt angle */
tht =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sit =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
cot =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(tt[0],nz*nx,Fang);
expand(tt,tht,fdm);
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
tht[ix][iz] *= SF_PI/180.;
sit[ix][iz] = sinf(tht[ix][iz]);
cot[ix][iz] = cosf(tht[ix][iz]);
}
}
free(*tht); free(tht);
}
/*------------------------------------------------------------*/
free(*tt); free(tt);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* allocate wavefield arrays */
pm=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
po=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
pp=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
pa=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
pm[ix][iz]=0;
po[ix][iz]=0;
pp[ix][iz]=0;
pa[ix][iz]=0;
}
}
if(atype[0] != 'i') {
qm=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
qo=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
qp=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
qa=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
qm[ix][iz]=0;
qo[ix][iz]=0;
qp[ix][iz]=0;
qa[ix][iz]=0;
}
}
if(sout) sf=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
}
/*------------------------------------------------------------*/
if(dabc) {
abc = abcone2d_make(NOP,dt,vp,fsrf,fdm); /* one-way */
spo = sponge_make(fdm->nb); /* sponge */
}
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
/* compute acceleration */
switch(atype[0]) {
case 't':
if(uses) {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz,H1p,H2p,H1q,H2q,st,ct) \
shared(fdm,pa,po,qa,qo, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z, \
vpn,vpz,vpx,vsz, \
sit,cot)
#endif
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
st=sit[ix][iz];
ct=cot[ix][iz];
H1p = H1(po,ix,iz, \
st,ct, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z);
H2p = H2(po,ix,iz, \
st,ct, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z);
H1q = H1(qo,ix,iz, \
st,ct, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z);
H2q = H2(qo,ix,iz, \
st,ct, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z);
/* p - main field */
pa[ix][iz] =
H1p * vsz[ix][iz] +
H2p * vpx[ix][iz] +
H1q * vpz[ix][iz] -
H1q * vsz[ix][iz];
/* q - auxiliary field */
qa[ix][iz] =
H2p * vpn[ix][iz] -
H2p * vsz[ix][iz] +
H1q * vpz[ix][iz] +
H2q * vsz[ix][iz];
}
}
} else {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz,H2p,H1q,st,ct) \
shared(fdm,pa,po,qa,qo, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z, \
vpn,vpz,vpx, \
sit,cot)
#endif
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
st=sit[ix][iz];
ct=cot[ix][iz];
H2p = H2(po,ix,iz, \
st,ct, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z);
H1q = H1(qo,ix,iz, \
st,ct, \
cox,cax,cbx,c1x,c2x, \
coz,caz,cbz,c1z,c2z);
/* p - main field */
pa[ix][iz] =
H2p * vpx[ix][iz] +
H1q * vpz[ix][iz];
/* q - auxiliary field */
qa[ix][iz] =
H2p * vpn[ix][iz] +
H1q * vpz[ix][iz];
}
}
}
break;
case 'v':
if(uses) {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz,H1p,H2p,H1q,H2q) \
shared(fdm,pa,po,qa,qo, \
cox,cax,cbx, \
coz,caz,cbz, \
vpn,vpz,vpx,vsz)
#endif
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
H1p = Dzz(po,ix,iz,coz,caz,cbz);
H1q = Dzz(qo,ix,iz,coz,caz,cbz);
H2p = Dxx(po,ix,iz,cox,cax,cbx);
H2q = Dxx(qo,ix,iz,cox,cax,cbx);
/* p - main field */
pa[ix][iz] =
H1p * vsz[ix][iz] +
H2p * vpx[ix][iz] +
H1q * vpz[ix][iz] -
H1q * vsz[ix][iz];
/* q - auxiliary field */
qa[ix][iz] =
H2p * vpn[ix][iz] -
H2p * vsz[ix][iz] +
H1q * vpz[ix][iz] +
H2q * vsz[ix][iz];
}
}
} else {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz,H2p,H1q) \
shared(fdm,pa,po,qa,qo, \
cox,cax,cbx, \
coz,caz,cbz, \
vpn,vpx,vpz)
#endif
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
H1q = Dzz(qo,ix,iz,coz,caz,cbz);
H2p = Dxx(po,ix,iz,cox,cax,cbx);
/* p - main field */
pa[ix][iz] =
H2p * vpx[ix][iz] +
H1q * vpz[ix][iz];
/* q - auxiliary field */
qa[ix][iz] =
H2p * vpn[ix][iz] +
H1q * vpz[ix][iz];
}
}
}
break;
case 'i':
default:
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz) \
shared(fdm,pa,po, \
cox,cax,cbx, \
coz,caz,cbz, \
vpz)
#endif
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
pa[ix][iz] = ( Dxx(po,ix,iz,cox,cax,cbx) +
Dzz(po,ix,iz,coz,caz,cbz) ) * vpz[ix][iz];
}
}
break;
}
/* inject acceleration source */
if(expl) {
sf_floatread(ww, 1,Fwav);
; lint2d_inject1(pa,ww[0],cs);
if(atype[0] != 'i') lint2d_inject1(qa,ww[0],cs);
} else {
sf_floatread(ww,ns,Fwav);
; lint2d_inject(pa,ww,cs);
if(atype[0] != 'i') lint2d_inject(qa,ww,cs);
}
/* step forward in time */
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz) \
shared(fdm,pa,po,pm,pp,dt2)
#endif
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
pp[ix][iz] = 2*po[ix][iz]
- pm[ix][iz]
+ pa[ix][iz] * dt2;
}
}
/* circulate wavefield arrays */
pt=pm;
pm=po;
po=pp;
pp=pt;
if(atype[0] != 'i') {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz) \
shared(fdm,qa,qo,qm,qp,dt2)
#endif
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
qp[ix][iz] = 2*qo[ix][iz]
- qm[ix][iz]
+ qa[ix][iz] * dt2;
}
}
/* circulate wavefield arrays */
qt=qm;
qm=qo;
qo=qp;
qp=qt;
}
/* one-way abc apply */
if(dabc) {
abcone2d_apply(po,pm,NOP,abc,fdm);
sponge2d_apply(pm,spo,fdm);
sponge2d_apply(po,spo,fdm);
if(atype[0] != 'i') {
abcone2d_apply(qo,qm,NOP,abc,fdm);
sponge2d_apply(qm,spo,fdm);
sponge2d_apply(qo,spo,fdm);
}
}
/* compute stress */
if(sout && (atype[0] != 'i')) {
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz) \
shared(fdm,po,qo,sf)
#endif
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
sf[ix][iz] = po[ix][iz] + qo[ix][iz];
}
}
}
/* extract data at receivers */
if(sout && (atype[0] != 'i')) {lint2d_extract(sf,dd,cr);
} else { lint2d_extract(po,dd,cr);}
if(it%jdata==0) sf_floatwrite(dd,nr,Fdat);
/* extract wavefield in the "box" */
if(snap && it%jsnap==0) {
if(sout && (atype[0] != 'i')) {cut2d(sf,pc,fdm,acz,acx);
} else { cut2d(po,pc,fdm,acz,acx);}
sf_floatwrite(pc[0],sf_n(acz)*sf_n(acx),Fwfl);
}
}
if(verb) fprintf(stderr,"\n");
/*------------------------------------------------------------*/
/* deallocate arrays */
free(*pm); free(pm);
free(*pp); free(pp);
free(*po); free(po);
free(*pa); free(pa);
free(*pc); free(pc);
free(*vp); free(vp);
free(*vpz); free(vpz);
if(atype[0] != 'i') {
free(*qm); free(qm);
free(*qp); free(qp);
free(*qo); free(qo);
free(*qa); free(qa);
free(*vpn); free(vpn);
free(*vpx); free(vpx);
if(uses){ free(*vsz); free(vsz); }
if(sout){ free(*sf); free(sf); }
}
if(atype[0] == 't') {
free(*sit); free(sit);
free(*cot); free(cot);
}
free(ww);
free(ss);
free(rr);
free(dd);
/*------------------------------------------------------------*/
exit (0);
}
int main(int argc, char* argv[])
{
bool verb; /* verbosity flag */
bool abc; /* absorbing boundary conditions flag */
bool free; /* free surface flag*/
bool snap; /* wavefield snapshots flag */
bool dens;
int jsnap;/* save wavefield every *jsnap* time steps */
/* I/O files */
sf_file Fw,Fs,Fr;
sf_file Fd,Fu;
sf_file Fv=NULL; /* velocity */
sf_file Fe=NULL; /* density */
/* cube axes */
sf_axis at,az,ax,as,ar;
int it,iz,ix,is,ir, iop;
int nt,nz,nx,ns,nr,nz2,nx2;
float z0,dz,x0,dx,idx,idz,dt,dt2;
/* arrays */
pt2d *ss, *rr; /* source/receiver locations */
float *ww=NULL; /* wavelet */
float *dd=NULL; /* data */
float **vv=NULL; /* velocity */
float **ee=NULL; /* density */
float *fzs,*fxs, *fzr,*fxr;
int *jzs,*jxs, *jzr,*jxr;
float *ws00,*ws01,*ws10,*ws11;
float *wr00,*wr01,*wr10,*wr11;
float **um,**uo,**up,**ud,**vp,**ro,**tt,**ut;
float *bzl,*bzh,*bxl,*bxh; /* boundary */
int nop=2; /* Laplacian operator size */
float c0, c1, c2; /* Laplacian operator coefficients */
float co,c1x,c2x,c1z,c2z;
int nbz,nbx; /* boundary size */
float tz, tx; /* sponge boundary decay coefficients */
float dp;
float ws; /* injected data */
int ompchunk; /* OpenMP data chunk size */
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
if(! sf_getint("ompchunk",&ompchunk)) ompchunk=1;
if(! sf_getbool("verb",&verb)) verb=false;
if(! sf_getbool( "abc",&abc )) abc=false;
if(! sf_getbool("snap",&snap)) snap=false;
if(! sf_getbool("free",&free)) free=false;
if(! sf_getbool("dens",&dens)) dens=false;
Fw = sf_input ("in" ); /* wavelet */
Fv = sf_input ("vel"); /* velocity */
Fs = sf_input ("sou"); /* sources */
Fr = sf_input ("rec"); /* receivers */
Fu = sf_output("wfl"); /* wavefield */
Fd = sf_output("out"); /* data */
if(dens) Fe = sf_input("den"); /* density */
/* read axes*/
at=sf_iaxa(Fw,1); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
az=sf_iaxa(Fv,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax=sf_iaxa(Fv,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* space */
as=sf_iaxa(Fs,2); sf_setlabel(as,"s"); if(verb) sf_raxa(as); /* source */
ar=sf_iaxa(Fr,2); sf_setlabel(ar,"r"); if(verb) sf_raxa(ar); /* receiver */
nt=sf_n(at); dt=sf_d(at);
nz=sf_n(az);
nx=sf_n(ax);
ns=sf_n(as);
nr=sf_n(ar);
/* configure wavefield snapshots */
if(snap) {
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
/*------------------------------------------------------------*/
/* expand domain for absorbing boundary conditions */
if(abc) {
if(! sf_getint("nbz",&nbz)) nbz=nop; if(nbz<nop) nbz=nop;
if(! sf_getint("nbx",&nbx)) nbx=nop; if(nbx<nop) nbx=nop;
if(! sf_getfloat("tz",&tz)) tz=0.025;
if(! sf_getfloat("tx",&tx)) tx=0.025;
} else {
nbz=nop;
nbx=nop;
}
/* expanded domain ( az+2 nz, ax+2 nx ) */
nz2=nz+2*nbz; dz=sf_d(az); z0=sf_o(az)-nbz*dz;
nx2=nx+2*nbx; dx=sf_d(ax); x0=sf_o(ax)-nbx*dx;
sf_setn(az,nz2); sf_seto(az,z0); if(verb) sf_raxa(az);
sf_setn(ax,nx2); sf_seto(ax,x0); if(verb) sf_raxa(ax);
/*------------------------------------------------------------*/
/* setup output data header */
sf_oaxa(Fd,ar,1);
sf_oaxa(Fd,at,2);
/* setup output wavefield header */
if(snap) {
sf_setn(at,nt/jsnap);
sf_setd(at,dt*jsnap);
sf_oaxa(Fu,az,1);
sf_oaxa(Fu,ax,2);
sf_oaxa(Fu,at,3);
}
/* Laplacian coefficients */
c0=-30./12.;
c1=+16./12.;
c2=- 1./12.;
dt2 = dt*dt;
idz = 1/dz;
idx = 1/dx;
co = c0 * (idx*idx+idz*idz);
c1x= c1 * idx*idx;
c2x= c2 * idx*idx;
c1z= c1 * idz*idz;
c2z= c2 * idz*idz;
/*------------------------------------------------------------*/
/* allocate arrays */
ww=sf_floatalloc (nt); sf_floatread(ww ,nt ,Fw);
vv=sf_floatalloc2(nz,nx); sf_floatread(vv[0],nz*nx,Fv);
ee=sf_floatalloc2(nz,nx);
if(dens) {
sf_floatread(ee[0],nz*nx,Fe);
} else {
for (iz=0; iz<nz; iz++) {
for (ix=0; ix<nx; ix++) {
ee[ix][iz]=1;
}
}
}
/* allocate source/receiver point arrays */
ss = (pt2d*) sf_alloc(ns,sizeof(*ss));
rr = (pt2d*) sf_alloc(nr,sizeof(*rr));
pt2dread1(Fs,ss,ns,3); /* read 3 elements (x,z,v) */
pt2dread1(Fr,rr,nr,2); /* read 2 elements (x,z) */
dd=sf_floatalloc(nr);
for(ir=0;ir<nr;ir++) {
dd[ir]=0;
}
jzs=sf_intalloc(ns); fzs=sf_floatalloc(ns);
jzr=sf_intalloc(nr); fzr=sf_floatalloc(nr);
jxs=sf_intalloc(ns); fxs=sf_floatalloc(ns);
jxr=sf_intalloc(nr); fxr=sf_floatalloc(nr);
ws00 = sf_floatalloc(ns); wr00 = sf_floatalloc(nr);
ws01 = sf_floatalloc(ns); wr01 = sf_floatalloc(nr);
ws10 = sf_floatalloc(ns); wr10 = sf_floatalloc(nr);
ws11 = sf_floatalloc(ns); wr11 = sf_floatalloc(nr);
/*------------------------------------------------------------*/
for (is=0;is<ns;is++) {
if(ss[is].z >= z0 &&
ss[is].z < z0 + (nz2-1)*dz &&
ss[is].x >= x0 &&
ss[is].x < x0 + (nx2-1)*dx) {
jzs[is] = (int)( (ss[is].z-z0)/dz);
fzs[is] = (ss[is].z-z0)/dz - jzs[is];
jxs[is] = (int)( (ss[is].x-x0)/dx);
fxs[is] = (ss[is].x-x0)/dx - jxs[is];
} else {
jzs[is] = 0; jxs[is] = 0;
fzs[is] = 1; fxs[is] = 0;
ss[is].v= 0;
}
ws00[is] = (1-fzs[is])*(1-fxs[is]);
ws01[is] = ( fzs[is])*(1-fxs[is]);
ws10[is] = (1-fzs[is])*( fxs[is]);
ws11[is] = ( fzs[is])*( fxs[is]);
}
for (ir=0;ir<nr;ir++) {
if(rr[ir].z >= z0 &&
rr[ir].z < z0 + (nz2-1)*dz &&
rr[ir].x >= x0 &&
rr[ir].x < x0 + (nx2-1)*dx) {
jzr[ir] = (int)( (rr[ir].z-z0)/dz);
fzr[ir] = (rr[ir].z-z0)/dz - jzr[ir];
jxr[ir] = (int)( (rr[ir].x-x0)/dx);
fxr[ir] = (rr[ir].x-x0)/dx - jxr[ir];
rr[ir].v=1;
} else {
jzr[ir] = 0;
fzr[ir] = 1;
rr[ir].v= 0;
}
wr00[ir] = (1-fzr[ir])*(1-fxr[ir]);
wr01[ir] = ( fzr[ir])*(1-fxr[ir]);
wr10[ir] = (1-fzr[ir])*( fxr[ir]);
wr11[ir] = ( fzr[ir])*( fxr[ir]);
}
/*------------------------------------------------------------*/
/* allocate temporary arrays */
um=sf_floatalloc2(nz2,nx2);
uo=sf_floatalloc2(nz2,nx2);
up=sf_floatalloc2(nz2,nx2);
ud=sf_floatalloc2(nz2,nx2);
tt=sf_floatalloc2(nz2,nx2);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,ix) shared(nx2,nz2,um,uo,up,ud,tt)
#endif
for (iz=0; iz<nz2; iz++) {
for (ix=0; ix<nx2; ix++) {
um[ix][iz]=0;
uo[ix][iz]=0;
up[ix][iz]=0;
ud[ix][iz]=0;
tt[ix][iz]=1;
}
}
/*------------------------------------------------------------*/
/* velocity in the expanded domain (vp=vv^2)*/
vp=sf_floatalloc2(nz2,nx2);
ro=sf_floatalloc2(nz2,nx2);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,ix) shared(nz,nx,vp,ro,vv,ee)
#endif
for (iz=0; iz<nz; iz++) {
for (ix=0; ix<nx; ix++) {
vp[nbx+ix][nbz+iz] = vv[ix][iz] * vv[ix][iz];
ro[nbx+ix][nbz+iz] = ee[ix][iz];
}
}
/* fill boundaries */
for (iz=0; iz<nbz; iz++) {
for (ix=0; ix<nx2; ix++) {
vp[ix][ iz ] = vp[ix][ nbz ];
vp[ix][nz2-iz-1] = vp[ix][nz2-nbz-1];
ro[ix][ iz ] = ro[ix][ nbz ];
ro[ix][nz2-iz-1] = ro[ix][nz2-nbz-1];
}
}
for (iz=0; iz<nz2; iz++) {
for (ix=0; ix<nbx; ix++) {
vp[ ix ][iz] = vp[ nbx ][iz];
vp[nx2-ix-1][iz] = vp[nx2-nbx-1][iz];
ro[ ix ][iz] = ro[ nbx ][iz];
ro[nx2-ix-1][iz] = ro[nx2-nbx-1][iz];
}
}
/*------------------------------------------------------------*/
/* free surface */
if(abc && free) {
for (iz=0; iz<nbz; iz++) {
for (ix=0; ix<nx2; ix++) {
vp[ix][iz]=0;
}
}
}
/*------------------------------------------------------------*/
/* sponge ABC setup */
if(abc) {
for (iz=0; iz<nbz; iz++) {
for (ix=0; ix<nx2; ix++) {
tt[ix][ iz ] = exp( - (tz*(nbz-iz))*(tz*(nbz-iz)) );
tt[ix][nz2-iz-1] = tt[ix][iz];
}
}
for (iz=0; iz<nz2; iz++) {
for (ix=0; ix<nbx; ix++) {
tt[ ix ][iz] = exp( - (tx*(nbx-ix))*(tx*(nbx-ix)) );
tt[nx2-ix-1][iz] = tt[ix][iz];
}
}
}
/* one-way ABC setup */
bzl=sf_floatalloc(nx2);
bzh=sf_floatalloc(nx2);
bxl=sf_floatalloc(nz2);
bxh=sf_floatalloc(nz2);
for (ix=0;ix<nx2;ix++) {
dp = vp[ix][ nop ] *dt/dz; bzl[ix] = (1-dp)/(1+dp);
dp = vp[ix][nz2-nop-1] *dt/dz; bzh[ix] = (1-dp)/(1+dp);
}
for (iz=0;iz<nz2;iz++) {
dp = vp[ nop ][iz] *dt/dx; bxl[iz] = (1-dp)/(1+dp);
dp = vp[nx2-nop-1][iz] *dt/dx; bxh[iz] = (1-dp)/(1+dp);
}
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
if(dens) { /* variable density */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,ix) shared(nop,nx2,nz2,ud,uo,ro,co,c1x,c1z,c2x,c2z,idx,idz)
#endif
for( ix=nop; ix<nx2-nop; ix++) {
for(iz=nop; iz<nz2-nop; iz++) {
/* 4th order Laplacian operator */
ud[ix][iz] =
co * uo[ix ][iz ] +
c1x*(uo[ix-1][iz ] + uo[ix+1][iz ]) +
c2x*(uo[ix-2][iz ] + uo[ix+2][iz ]) +
c1z*(uo[ix ][iz-1] + uo[ix ][iz+1]) +
c2z*(uo[ix ][iz-2] + uo[ix ][iz+2]);
/* density terms */
ud[ix][iz] -= (
D1(uo,ix,iz,idz) * D1(ro,ix,iz,idz) +
D2(uo,ix,iz,idx) * D2(ro,ix,iz,idx) ) / ro[ix][iz];
}
}
} else { /* constant density */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,ix) shared(nop,nx2,nz2,ud,uo,co,c1x,c1z,c2x,c2z)
#endif
for( ix=nop; ix<nx2-nop; ix++) {
for(iz=nop; iz<nz2-nop; iz++) {
/* 4th order Laplacian operator */
ud[ix][iz] =
co * uo[ix ][iz ] +
c1x*(uo[ix-1][iz ] + uo[ix+1][iz ]) +
c2x*(uo[ix-2][iz ] + uo[ix+2][iz ]) +
c1z*(uo[ix ][iz-1] + uo[ix ][iz+1]) +
c2z*(uo[ix ][iz-2] + uo[ix ][iz+2]);
}
}
}
/* inject wavelet */
for (is=0;is<ns;is++) {
ws = ww[it] * ss[is].v;
ud[ jxs[is] ][ jzs[is] ] -= ws * ws00[is];
ud[ jxs[is] ][ jzs[is]+1] -= ws * ws01[is];
ud[ jxs[is]+1][ jzs[is] ] -= ws * ws10[is];
ud[ jxs[is]+1][ jzs[is]+1] -= ws * ws11[is];
}
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz) shared(nx2,nz2,ud,uo,um,up,vp,dt2)
#endif
for( ix=0; ix<nx2; ix++) {
for(iz=0; iz<nz2; iz++) {
/* time step and velocity scale*/
up[ix][iz] = 2*uo[ix][iz] -
um[ix][iz] +
ud[ix][iz] * vp[ix][iz] * dt2;
}
}
/* circulate arrays */
ut=um;
um=uo;
uo=up;
up=ut;
/* one-way ABC apply */
if(abc) {
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz,iop) shared(nx2,nz2,nop,uo,um,bzl,bzh)
#endif
for(ix=0;ix<nx2;ix++) {
for(iop=0;iop<nop;iop++) {
iz = nop-iop;
uo [ix][iz ]
= um[ix][iz+1]
+(um[ix][iz ]
- uo[ix][iz+1]) * bzl[ix];
iz = nz2-nop+iop-1;
uo [ix][iz ]
= um[ix][iz-1]
+(um[ix][iz ]
- uo[ix][iz-1]) * bzh[ix];
}
}
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,1) private(ix,iz,iop) shared(nx2,nz2,nop,uo,um,bzl,bzh)
#endif
for(iop=0;iop<nop;iop++) {
for(iz=0;iz<nz2;iz++) {
ix = nop-iop;
uo [ix ][iz]
= um[ix+1][iz]
+(um[ix ][iz]
- uo[ix+1][iz]) * bxl[iz];
ix = nx2-nop+iop-1;
uo [ix ][iz]
= um[ix-1][iz]
+(um[ix ][iz]
- uo[ix-1][iz]) * bxh[iz];
}
}
}
/* sponge ABC apply */
if(abc) {
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(ix,iz) shared(nx2,nz2,uo,um,ud,tt)
#endif
for( ix=0; ix<nx2; ix++) {
for(iz=0; iz<nz2; iz++) {
uo[ix][iz] *= tt[ix][iz];
um[ix][iz] *= tt[ix][iz];
ud[ix][iz] *= tt[ix][iz];
}
}
}
/* write wavefield */
if(snap && it%jsnap==0) {
sf_floatwrite(uo[0],nz2*nx2,Fu);
}
/* collect data */
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,1) private(ir) shared(dd,rr,uo,jzr,wr00,wr01,wr10,wr11)
#endif
for (ir=0;ir<nr;ir++) {
dd[ir] =
uo[ jxr[ir] ][ jzr[ir] ] * wr00[ir] +
uo[ jxr[ir] ][ jzr[ir]+1] * wr01[ir] +
uo[ jxr[ir]+1][ jzr[ir] ] * wr10[ir] +
uo[ jxr[ir]+1][ jzr[ir]+1] * wr11[ir];
dd[ir] *= rr[ir].v;
}
/* write data */
sf_floatwrite(dd,nr,Fd);
}
if(verb) fprintf(stderr,"\n");
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,fsrf,snap,expl,dabc;
int jsnap,ntsnap,jdata;
/* OMP parameters */
#ifdef _OPENMP
int ompnth;
#endif
/* I/O files */
sf_file Fwav=NULL; /* wavelet */
sf_file Fsou=NULL; /* sources */
sf_file Frec=NULL; /* receivers */
sf_file Fvel=NULL; /* velocity */
sf_file Fdat=NULL; /* data */
sf_file Fwfl=NULL; /* wavefield */
/* cube axes */
sf_axis at,az,ax;
sf_axis as,ar;
int nt,nz,nx,ns,nr,nb;
int it,iz,ix;
float dt,dz,dx,idz,idx,dt2;
/* FDM structure */
fdm2d fdm=NULL;
abcone2d abc=NULL;
sponge spo=NULL;
/* I/O arrays */
float *ww=NULL; /* wavelet */
pt2d *ss=NULL; /* sources */
pt2d *rr=NULL; /* receivers */
float *dd=NULL; /* data */
float **tt=NULL;
float **vp=NULL; /* velocity */
float **vp2=NULL;
float **vv2=NULL;
float **vh2=NULL;
float **rm,**ro,**rp,**ra,**rt; /* main wavefield */
float **qm,**qo,**qp,**qa,**qt; /* auxiliary wavefield */
/* linear interpolation weights/indices */
lint2d cs,cr;
/* FD operator size */
float cox,coz,cax,cbx,caz,cbz;
/* wavefield cut params */
sf_axis acz=NULL,acx=NULL;
int nqz,nqx;
float oqz,oqx;
float dqz,dqx;
float **qc=NULL;
float H2q,H1r;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
/*------------------------------------------------------------*/
/* OMP parameters */
#ifdef _OPENMP
ompnth=omp_init();
#endif
/*------------------------------------------------------------*/
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("snap",&snap)) snap=false; /* wavefield snapshots flag */
if(! sf_getbool("free",&fsrf)) fsrf=false; /* free surface flag */
if(! sf_getbool("expl",&expl)) expl=false; /* "exploding reflector" */
if(! sf_getbool("dabc",&dabc)) dabc=false; /* absorbing BC */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* I/O files */
Fwav = sf_input ("in" ); /* wavelet */
Fvel = sf_input ("vel"); /* velocity */
Fsou = sf_input ("sou"); /* sources */
Frec = sf_input ("rec"); /* receivers */
Fwfl = sf_output("wfl"); /* wavefield */
Fdat = sf_output("out"); /* data */
/*------------------------------------------------------------*/
/* axes */
at = sf_iaxa(Fwav,2); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
az = sf_iaxa(Fvel,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax = sf_iaxa(Fvel,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* space */
as = sf_iaxa(Fsou,2); sf_setlabel(as,"s"); if(verb) sf_raxa(as); /* sources */
ar = sf_iaxa(Frec,2); sf_setlabel(ar,"r"); if(verb) sf_raxa(ar); /* receivers */
nt = sf_n(at); dt = sf_d(at);
nz = sf_n(az); dz = sf_d(az);
nx = sf_n(ax); dx = sf_d(ax);
ns = sf_n(as);
nr = sf_n(ar);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* other execution parameters */
if(! sf_getint("jdata",&jdata)) jdata=1;
if(snap) { /* save wavefield every *jsnap* time steps */
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* expand domain for FD operators and ABC */
if( !sf_getint("nb",&nb) || nb<NOP) nb=NOP;
fdm=fdutil_init(verb,fsrf,az,ax,nb,1);
sf_setn(az,fdm->nzpad); sf_seto(az,fdm->ozpad); if(verb) sf_raxa(az);
sf_setn(ax,fdm->nxpad); sf_seto(ax,fdm->oxpad); if(verb) sf_raxa(ax);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* setup output data header */
sf_oaxa(Fdat,ar,1);
sf_setn(at,nt/jdata);
sf_setd(at,dt*jdata);
sf_oaxa(Fdat,at,2);
/* setup output wavefield header */
if(snap) {
if(!sf_getint ("nqz",&nqz)) nqz=sf_n(az);
if(!sf_getint ("nqx",&nqx)) nqx=sf_n(ax);
if(!sf_getfloat("oqz",&oqz)) oqz=sf_o(az);
if(!sf_getfloat("oqx",&oqx)) oqx=sf_o(ax);
dqz=sf_d(az);
dqx=sf_d(ax);
acz = sf_maxa(nqz,oqz,dqz); sf_raxa(acz);
acx = sf_maxa(nqx,oqx,dqx); sf_raxa(acx);
/* check if the imaging window fits in the wavefield domain */
qc=sf_floatalloc2(sf_n(acz),sf_n(acx));
ntsnap=0;
for(it=0; it<nt; it++) {
if(it%jsnap==0) ntsnap++;
}
sf_setn(at, ntsnap);
sf_setd(at,dt*jsnap);
if(verb) sf_raxa(at);
sf_oaxa(Fwfl,acz,1);
sf_oaxa(Fwfl,acx,2);
sf_oaxa(Fwfl,at, 3);
}
if(expl) {
ww = sf_floatalloc( 1);
} else {
ww = sf_floatalloc(ns);
}
dd = sf_floatalloc(nr);
/*------------------------------------------------------------*/
/* setup source/receiver coordinates */
ss = (pt2d*) sf_alloc(ns,sizeof(*ss));
rr = (pt2d*) sf_alloc(nr,sizeof(*rr));
pt2dread1(Fsou,ss,ns,2); /* read (x,z) coordinates */
pt2dread1(Frec,rr,nr,2); /* read (x,z) coordinates */
cs = lint2d_make(ns,ss,fdm);
cr = lint2d_make(nr,rr,fdm);
/*------------------------------------------------------------*/
/* setup FD coefficients */
idz = 1/dz;
idx = 1/dx;
cox= C0 * (idx*idx);
cax= CA * idx*idx;
cbx= CB * idx*idx;
coz= C0 * (idz*idz);
caz= CA * idz*idz;
cbz= CB * idz*idz;
/* precompute dt^2*/
dt2 = dt*dt;
/*------------------------------------------------------------*/
tt = sf_floatalloc2(nz,nx);
/*------------------------------------------------------------*/
/* input velocity */
vp =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
vp2 =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
vv2 =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
vh2 =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
sf_floatread(tt[0],nz*nx,Fvel ); expand(tt,vv2,fdm); /* vertical v */
sf_floatread(tt[0],nz*nx,Fvel ); expand(tt,vp2,fdm); /* NMO v */
sf_floatread(tt[0],nz*nx,Fvel ); expand(tt,vh2,fdm); /* horizontal v */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
vp2[ix][iz] = vp2[ix][iz] * vp2[ix][iz];
vv2[ix][iz] = vv2[ix][iz] * vv2[ix][iz];
vh2[ix][iz] = vh2[ix][iz] * vh2[ix][iz];
}
}
if(fsrf) { /* free surface */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nb; iz++) {
vp2[ix][iz]=0;
vv2[ix][iz]=0;
vh2[ix][iz]=0;
}
}
}
/*------------------------------------------------------------*/
free(*tt); free(tt);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* allocate wavefield arrays */
qm=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
qo=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
qp=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
qa=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
rm=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
ro=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
rp=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
ra=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
qm[ix][iz]=0;
qo[ix][iz]=0;
qp[ix][iz]=0;
qa[ix][iz]=0;
rm[ix][iz]=0;
ro[ix][iz]=0;
rp[ix][iz]=0;
ra[ix][iz]=0;
}
}
/*------------------------------------------------------------*/
if(dabc) {
/* one-way abc setup */
abc = abcone2d_make(NOP,dt,vp,fsrf,fdm);
/* sponge abc setup */
spo = sponge_make(fdm->nb);
}
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz,H2q,H1r) \
shared(fdm,ra,ro,qa,qo,cox,coz,cax,caz,cbx,cbz,idx,idz,vp2)
#endif
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
H2q = Dxx(qo,ix,iz,cox,cax,cbx);
H1r = Dzz(ro,ix,iz,coz,caz,cbz);
/* main field - q */
qa[ix][iz] = H2q * vh2[ix][iz] + H1r * vv2[ix][iz] ;
/* auxiliary field - r */
ra[ix][iz] = H2q * vp2[ix][iz] + H1r * vv2[ix][iz] ;
}
}
/* inject acceleration source */
if(expl) {
sf_floatread(ww, 1,Fwav);
lint2d_inject1(ra,ww[0],cs);
lint2d_inject1(qa,ww[0],cs);
} else {
sf_floatread(ww,ns,Fwav);
lint2d_inject(ra,ww,cs);
lint2d_inject(qa,ww,cs);
}
/* step forward in time */
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz) \
shared(fdm,ra,ro,rm,rp,qa,qo,qm,qp,dt2)
#endif
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
qp[ix][iz] = 2*qo[ix][iz]
- qm[ix][iz]
+ qa[ix][iz] * dt2;
rp[ix][iz] = 2*ro[ix][iz]
- rm[ix][iz]
+ ra[ix][iz] * dt2;
}
}
/* circulate wavefield arrays */
qt=qm;
qm=qo;
qo=qp;
qp=qt;
rt=rm;
rm=ro;
ro=rp;
rp=rt;
if(dabc) {
/* one-way abc apply */
abcone2d_apply(qo,qm,NOP,abc,fdm);
sponge2d_apply(qm,spo,fdm);
sponge2d_apply(qo,spo,fdm);
sponge2d_apply(qp,spo,fdm);
/* one-way abc apply */
abcone2d_apply(ro,rm,NOP,abc,fdm);
sponge2d_apply(rm,spo,fdm);
sponge2d_apply(ro,spo,fdm);
sponge2d_apply(rp,spo,fdm);
}
/* extract data */
lint2d_extract(qo,dd,cr);
if(snap && it%jsnap==0) {
cut2d(qo,qc,fdm,acz,acx);
sf_floatwrite(qc[0],sf_n(acz)*sf_n(acx),Fwfl);
}
if( it%jdata==0)
sf_floatwrite(dd,nr,Fdat);
}
if(verb) fprintf(stderr,"\n");
/*------------------------------------------------------------*/
/* deallocate arrays */
free(*rm); free(rm);
free(*rp); free(rp);
free(*ro); free(ro);
free(*ra); free(ra);
free(*qm); free(qm);
free(*qp); free(qp);
free(*qo); free(qo);
free(*qa); free(qa);
free(*qc); free(qc);
free(*vp); free(vp);
free(*vp2); free(vp2);
free(*vh2); free(vh2);
free(*vv2); free(vv2);
free(ww);
free(ss);
free(rr);
free(dd);
exit (0);
}
int main(int argc, char* argv[])
{
bool verb;
sf_axis az,ah,ahx,ahy,ahz;
int iz, ihx,ihy,ihz;
int nz, nhx,nhy,nhz;
float hx, hy, hz;
float oh,dh,ohx,dhx,ohy,dhy,ohz,dhz;
sf_bands spl;
sf_file Fd; /* data = vector offset (hx,hy,hz)-z */
sf_file Fm; /* model = absolute offset h -z */
int nw; /* spline order */
int nd,id; /* data size (nd=nhx*nhy*nhz) */
int nh; /* model size (nm=nh) */
float *dat=NULL;
float *mod=NULL;
float *map=NULL;
float *mwt=NULL;
float *dwt=NULL;
int i;
/* int im;*/
/*------------------------------------------------------------*/
sf_init(argc,argv);
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getint( "nw",&nw)) nw=4; /* spline order */
Fd = sf_input ("in");
ahx = sf_iaxa(Fd,1); sf_setlabel(ahx,"hx"); if(verb) sf_raxa(ahx);
ahy = sf_iaxa(Fd,2); sf_setlabel(ahy,"hy"); if(verb) sf_raxa(ahy);
ahz = sf_iaxa(Fd,3); sf_setlabel(ahz,"hz"); if(verb) sf_raxa(ahz);
az = sf_iaxa(Fd,4); sf_setlabel(az,"z"); if(verb) sf_raxa(az);
nhx = sf_n(ahx); ohx = sf_o(ahx); dhx = sf_d(ahx);
nhy = sf_n(ahy); ohy = sf_o(ahy); dhy = sf_d(ahy);
nhz = sf_n(ahz); ohz = sf_o(ahz); dhz = sf_d(ahz);
nz = sf_n(az);
if(!sf_getint ("nh",&nh)) nh=nhx + ohx/dhx;
if(!sf_getfloat("oh",&oh)) oh=0;
if(!sf_getfloat("dh",&dh)) dh=dhx;
ah = sf_maxa(nh,oh,dh); sf_setlabel(ah,"h"); if(verb) sf_raxa(ah);
Fm = sf_output("out");
sf_oaxa(Fm,ah,1);
sf_oaxa(Fm,az,2);
sf_putint(Fm,"n3",1);
sf_putint(Fm,"n4",1);
/*------------------------------------------------------------*/
nd = nhx*nhy*nhz; /* data size */
map = sf_floatalloc(nd); /* mapping */
mod = sf_floatalloc(nh); /* model vector */
dat = sf_floatalloc(nd); /* data vector */
mwt = sf_floatalloc(nh); /* model weight */
dwt = sf_floatalloc(nd); /* data weight */
spl = sf_spline_init(nw,nd);
for(ihz=0;ihz<nhz;ihz++) {
hz = ohz + ihz * dhz; hz*=hz;
for(ihy=0;ihy<nhy;ihy++) {
hy = ohy + ihy * dhy; hy*=hy;
for(ihx=0;ihx<nhx;ihx++) {
hx = ohx + ihx * dhx; hx*=hx;
i = ihz * nhx*nhy +
ihy * nhx +
ihx;
map[i] = sqrtf(hx+hy+hz);
}
}
}
sf_int1_init( map,
oh, dh, nh,
sf_spline_int,
nw,
nd,
0.0);
for(id=0;id<nd;id++) {
dwt[id]=1;
}
sf_banded_solve(spl,dwt);
for(iz=0;iz<nz;iz++) {
sf_warning("iz=%d of %d",iz+1,nz);
sf_floatread(dat,nd,Fd);
sf_banded_solve(spl,dat);
sf_int1_lop( true, /* adj */
false, /* add */
nh, /* n model */
nd, /* n data */
mod,
dat);
sf_floatwrite(mod,nh,Fm);
}
/*------------------------------------------------------------*/
sf_int1_close();
free(map);
free(mod);
free(dat);
free(mwt);
free(dwt);
exit(0);
}
int main(int argc, char* argv[])
{
/*------------------------------------------------------------*/
/* Execution control, I/O files and geometry */
/*------------------------------------------------------------*/
bool verb,fsrf,snap,back,esou; /* execution flags */
int jsnap,ntsnap,jdata; /* jump along axes */
int shft; /* time shift for wavefield matching in RTM */
/* I/O files */
sf_file Fwav=NULL; /* wavelet */
sf_file Fdat=NULL; /* data */
sf_file Fsou=NULL; /* sources */
sf_file Frec=NULL; /* receivers */
sf_file Fccc=NULL; /* velocity */
sf_file Frkp=NULL; /* app. rank */
sf_file Fltp=NULL; /* left mat */
sf_file Frtp=NULL; /* right mat */
sf_file Fwfp=NULL; /* wavefield */
sf_file Frks=NULL; /* app. rank */
sf_file Flts=NULL; /* left mat */
sf_file Frts=NULL; /* right mat */
sf_file Fwfs=NULL; /* wavefield */
/* cube axes */
sf_axis at,ax,ay,az; /* time, x, y, z */
sf_axis asx,asy,arx,ary,ac; /* sou, rec-x, rec-y, component */
/* dimension, index and interval */
int nt,nz,nx,ny,ns,nr,nc,nb;
int it,iz,ix,iy;
float dt,dz,dx,dy;
int nxyz, nk;
/* FDM and KSP structure */ //!!!JS
fdm3d fdm=NULL;
dft3d dft=NULL;
clr3d clr_p=NULL, clr_s=NULL;
/* I/O arrays for sou & rec */
sf_complex***ww=NULL; /* wavelet */
pt3d *ss=NULL; /* sources */
pt3d *rr=NULL; /* receivers */
sf_complex **dd=NULL; /* data */
/*------------------------------------------------------------*/
/* displacement: uo = U @ t; up = U @ t+1 */
/*------------------------------------------------------------*/
sf_complex ***uox, ***uoy, ***uoz, **uo;
sf_complex ***uox_p, ***uoy_p, ***uoz_p, **uo_p;
sf_complex ***uox_s, ***uoy_s, ***uoz_s, **uo_s;
/*sf_complex ***upx, ***upy, ***upz, **up;*/
/*------------------------------------------------------------*/
/* lowrank decomposition arrays */
/*------------------------------------------------------------*/
int ntmp, *n2s_p, *n2s_s;
sf_complex **lt_p, **rt_p, **lt_s, **rt_s;
/*------------------------------------------------------------*/
/* linear interpolation weights/indices */
/*------------------------------------------------------------*/
lint3d cs,cr; /* for injecting source and extracting data */
/* Gaussian bell */
int nbell;
/*------------------------------------------------------------*/
/* wavefield cut params */
/*------------------------------------------------------------*/
sf_axis acz=NULL,acx=NULL,acy=NULL;
int nqz,nqx,nqy;
float oqz,oqx,oqy;
float dqz,dqx,dqy;
sf_complex***uc=NULL; /* tmp array for output wavefield snaps */
/*------------------------------------------------------------*/
/* init RSF */
/*------------------------------------------------------------*/
sf_init(argc,argv);
/*------------------------------------------------------------*/
/* OMP parameters */
/*------------------------------------------------------------*/
#ifdef _OPENMP
omp_init();
#endif
/*------------------------------------------------------------*/
/* read execution flags */
/*------------------------------------------------------------*/
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("snap",&snap)) snap=false; /* wavefield snapshots flag */
if(! sf_getbool("free",&fsrf)) fsrf=false; /* free surface flag */
if(! sf_getbool("back",&back)) back=false; /* backward extrapolation flag (for rtm) */
if(! sf_getbool("esou",&esou)) esou=false; /* explosive force source */
/*------------------------------------------------------------*/
/* I/O files */
/*------------------------------------------------------------*/
Fwav = sf_input ("in" ); /* wavelet */
Fdat = sf_output("out"); /* data */
Fsou = sf_input ("sou"); /* sources */
Frec = sf_input ("rec"); /* receivers */
Fccc = sf_input ("ccc"); /* stiffness */
Frkp = sf_input ("rkp"); /* app. rank */
Fltp = sf_input ("ltp"); /* left mat */
Frtp = sf_input ("rtp"); /* right mat */
Fwfp = sf_output("wfp"); /* wavefield */
Frks = sf_input ("rks"); /* app. rank */
Flts = sf_input ("lts"); /* left mat */
Frts = sf_input ("rts"); /* right mat */
Fwfs = sf_output("wfs"); /* wavefield */
/*------------------------------------------------------------*/
/* axes */
/*------------------------------------------------------------*/
at = sf_iaxa(Fwav,4); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
az = sf_iaxa(Fccc,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax = sf_iaxa(Fccc,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* space x */
ay = sf_iaxa(Fccc,3); sf_setlabel(ay,"y"); if(verb) sf_raxa(ay); /* space y */
asx = sf_iaxa(Fsou,2); sf_setlabel(asx,"sx"); if(verb) sf_raxa(asx); /* sources x */
asy = sf_iaxa(Fsou,3); sf_setlabel(asy,"sy"); if(verb) sf_raxa(asy); /* sources y */
arx = sf_iaxa(Frec,2); sf_setlabel(arx,"rx"); if(verb) sf_raxa(arx); /* receivers x */
ary = sf_iaxa(Frec,3); sf_setlabel(ary,"ry"); if(verb) sf_raxa(ary); /* receivers y */
nt = sf_n(at); dt = sf_d(at);
nz = sf_n(az); dz = sf_d(az);
nx = sf_n(ax); dx = sf_d(ax);
ny = sf_n(ay); dy = sf_d(ay);
ns = sf_n(asx)*sf_n(asy);
nr = sf_n(arx)*sf_n(ary);
/*------------------------------------------------------------*/
/* other execution parameters */
/*------------------------------------------------------------*/
if(! sf_getint("nbell",&nbell)) nbell=NOP; /* bell size */
if(verb) sf_warning("nbell=%d",nbell);
if(! sf_getint("jdata",&jdata)) jdata=1;
if(snap) { /* save wavefield every *jsnap* time steps */
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
if(back) {
shft = (nt-1)%jsnap;
sf_warning("For backward extrapolation, make sure nbell(%d)=0",nbell);
} else shft = 0;
/*------------------------------------------------------------*/
/* expand domain for FD operators and ABC */
/*------------------------------------------------------------*/
if( !sf_getint("nb",&nb)) nb=NOP;
fdm=fdutil3d_init(verb,fsrf,az,ax,ay,nb,1);
if(nbell) fdbell3d_init(nbell);
sf_setn(az,fdm->nzpad); sf_seto(az,fdm->ozpad); if(verb) sf_raxa(az);
sf_setn(ax,fdm->nxpad); sf_seto(ax,fdm->oxpad); if(verb) sf_raxa(ax);
sf_setn(ay,fdm->nypad); sf_seto(ay,fdm->oypad); if(verb) sf_raxa(ay);
/*------------------------------------------------------------*/
/* 3D vector components */
/*------------------------------------------------------------*/
nc=3;
ac=sf_maxa(nc,0,1); /* output 3 cartesian components */
/*------------------------------------------------------------*/
/* setup output data header */
/*------------------------------------------------------------*/
sf_settype(Fdat,SF_COMPLEX);
sf_oaxa(Fdat,arx,1);
sf_oaxa(Fdat,ary,2);
sf_oaxa(Fdat,ac,3);
sf_setn(at,nt/jdata);
sf_setd(at,dt*jdata);
sf_oaxa(Fdat,at,4);
/* setup output wavefield header */
if(snap) {
if(!sf_getint ("nqz",&nqz)) nqz=sf_n(az);
if(!sf_getint ("nqx",&nqx)) nqx=sf_n(ax);
if(!sf_getint ("nqy",&nqy)) nqy=sf_n(ay);
if(!sf_getfloat("oqz",&oqz)) oqz=sf_o(az);
if(!sf_getfloat("oqx",&oqx)) oqx=sf_o(ax);
if(!sf_getfloat("oqy",&oqy)) oqy=sf_o(ay);
dqz=sf_d(az);
dqx=sf_d(ax);
dqy=sf_d(ay);
acz = sf_maxa(nqz,oqz,dqz); sf_raxa(acz);
acx = sf_maxa(nqx,oqx,dqx); sf_raxa(acx);
acy = sf_maxa(nqy,oqy,dqy); sf_raxa(acy);
uc=sf_complexalloc3(sf_n(acz),sf_n(acx),sf_n(acy));
ntsnap=0; /* ntsnap = it/jsnap+1; */
for(it=0; it<nt; it++) {
if(it%jsnap==0) ntsnap++;
}
sf_setn(at, ntsnap);
sf_setd(at,dt*jsnap);
if(verb) sf_raxa(at);
sf_settype(Fwfp,SF_COMPLEX);
sf_oaxa(Fwfp,acz,1);
sf_oaxa(Fwfp,acx,2);
sf_oaxa(Fwfp,acy,3);
sf_oaxa(Fwfp,ac, 4);
sf_oaxa(Fwfp,at, 5);
sf_settype(Fwfs,SF_COMPLEX);
sf_oaxa(Fwfs,acz,1);
sf_oaxa(Fwfs,acx,2);
sf_oaxa(Fwfs,acy,3);
sf_oaxa(Fwfs,ac, 4);
sf_oaxa(Fwfs,at, 5);
}
/*------------------------------------------------------------*/
/* source and data array */
/*------------------------------------------------------------*/
ww=sf_complexalloc3(ns,nc,nt); /* Fast axis: n_sou > n_comp > n_time */
sf_complexread(ww[0][0],nt*nc*ns,Fwav);
dd=sf_complexalloc2(nr,nc);
/*------------------------------------------------------------*/
/* setup source/receiver coordinates */
/*------------------------------------------------------------*/
ss = (pt3d*) sf_alloc(ns,sizeof(*ss));
rr = (pt3d*) sf_alloc(nr,sizeof(*rr));
pt3dread1(Fsou,ss,ns,3); /* read (x,y,z) coordinates */
pt3dread1(Frec,rr,nr,3); /* read (x,y,z) coordinates */
/* calculate 3d linear interpolation coef for sou & rec */
cs = lint3d_make(ns,ss,fdm);
cr = lint3d_make(nr,rr,fdm);
/*------------------------------------------------------------*/
/* allocate and initialize wavefield arrays */
/*------------------------------------------------------------*/
/* z-component */
uoz=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uoz_p=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uoz_s=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
/*upz=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);*/
/* x-component */
uox=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uox_p=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uox_s=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
/*upx=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);*/
/* y-component */
uoy=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uoy_p=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
uoy_s=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);
/*upy=sf_complexalloc3(fdm->nzpad,fdm->nxpad,fdm->nypad);*/
/* wavefield vector */
uo = (sf_complex**) sf_alloc(3,sizeof(sf_complex*));
uo[0] = uox[0][0]; uo[1] = uoy[0][0]; uo[2] = uoz[0][0];
uo_p = (sf_complex**) sf_alloc(3,sizeof(sf_complex*));
uo_p[0] = uox_p[0][0]; uo_p[1] = uoy_p[0][0]; uo_p[2] = uoz_p[0][0];
uo_s = (sf_complex**) sf_alloc(3,sizeof(sf_complex*));
uo_s[0] = uox_s[0][0]; uo_s[1] = uoy_s[0][0]; uo_s[2] = uoz_s[0][0];
/*up = (sf_complex**) sf_alloc(3,sizeof(sf_complex*));*/
/*up[0] = upx[0][0]; up[1] = upy[0][0]; up[2] = upz[0][0];*/
/* initialize fft and lrk */
dft = dft3d_init(1,false,false,fdm);
nxyz= fdm->nypad*fdm->nxpad*fdm->nzpad;
nk = dft->nky *dft->nkx *dft->nkz;
/*------------------------------------------------------------*/
/* allocation I/O arrays */
/*------------------------------------------------------------*/
n2s_p = sf_intalloc(9);
sf_intread(n2s_p,9,Frkp);
clr_p = clr3d_make2(n2s_p,fdm);
n2s_s = sf_intalloc(9);
sf_intread(n2s_s,9,Frks);
clr_s = clr3d_make2(n2s_s,fdm);
if (clr_p->n2_max > clr_s->n2_max) clr3d_init(fdm,dft,clr_p);
else clr3d_init(fdm,dft,clr_s);
/* check the dimension */
if (!sf_histint(Fltp,"n1",&ntmp) || ntmp != nxyz) sf_error("Need n1=%d in left",nxyz);
if (!sf_histint(Fltp,"n2",&ntmp) || ntmp != clr_p->n2_sum) sf_error("Need n2=%d in left",clr_p->n2_sum);
if (!sf_histint(Frtp,"n1",&ntmp) || ntmp != nk) sf_error("Need n1=%d in right",nk);
if (!sf_histint(Frtp,"n2",&ntmp) || ntmp != clr_p->n2_sum) sf_error("Need n2=%d in right",clr_p->n2_sum);
lt_p = sf_complexalloc2(nxyz,clr_p->n2_sum);
rt_p = sf_complexalloc2(nk ,clr_p->n2_sum);
sf_complexread(lt_p[0],nxyz*clr_p->n2_sum,Fltp);
sf_complexread(rt_p[0],nk *clr_p->n2_sum,Frtp);
if (!sf_histint(Flts,"n1",&ntmp) || ntmp != nxyz) sf_error("Need n1=%d in left",nxyz);
if (!sf_histint(Flts,"n2",&ntmp) || ntmp != clr_s->n2_sum) sf_error("Need n2=%d in left",clr_s->n2_sum);
if (!sf_histint(Frts,"n1",&ntmp) || ntmp != nk) sf_error("Need n1=%d in right",nk);
if (!sf_histint(Frts,"n2",&ntmp) || ntmp != clr_s->n2_sum) sf_error("Need n2=%d in right",clr_s->n2_sum);
lt_s = sf_complexalloc2(nxyz,clr_s->n2_sum);
rt_s = sf_complexalloc2(nk ,clr_s->n2_sum);
sf_complexread(lt_s[0],nxyz*clr_s->n2_sum,Flts);
sf_complexread(rt_s[0],nk *clr_s->n2_sum,Frts);
/* initialize to zero */
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,1) \
private(iy,ix,iz) \
shared(fdm,uoz,uox,uoy,uoz_p,uox_p,uoy_p,uoz_s,uox_s,uoy_s)
#endif
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
uoz [iy][ix][iz]=sf_cmplx(0.,0.); uox [iy][ix][iz]=sf_cmplx(0.,0.); uoy [iy][ix][iz]=sf_cmplx(0.,0.);
uoz_p[iy][ix][iz]=sf_cmplx(0.,0.); uox_p[iy][ix][iz]=sf_cmplx(0.,0.); uoy_p[iy][ix][iz]=sf_cmplx(0.,0.);
uoz_s[iy][ix][iz]=sf_cmplx(0.,0.); uox_s[iy][ix][iz]=sf_cmplx(0.,0.); uoy_s[iy][ix][iz]=sf_cmplx(0.,0.);
/*upz[iy][ix][iz]=sf_cmplx(0.,0.); upx[iy][ix][iz]=sf_cmplx(0.,0.); upy[iy][ix][iz]=sf_cmplx(0.,0.);*/
}
}
}
/*------------------------------------------------------------*/
/*------------------------ MAIN LOOP -------------------------*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) sf_warning("it=%d/%d;",it,nt); /*fprintf(stderr,"\b\b\b\b\b%d",it);*/
/*------------------------------------------------------------*/
/* apply lowrank matrix to wavefield vector */
/*------------------------------------------------------------*/
clr3d_apply(uo_p, uo, lt_p, rt_p, fdm, dft, clr_p);
clr3d_apply(uo_s, uo, lt_s, rt_s, fdm, dft, clr_s);
/*------------------------------------------------------------*/
/* combine P and S wave modes */
/*------------------------------------------------------------*/
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,1) \
private(iy,ix,iz) \
shared(fdm,uoz,uox,uoy,uoz_p,uox_p,uoy_p,uoz_s,uox_s,uoy_s)
#endif
for (iy=0; iy<fdm->nypad; iy++) {
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
uoz[iy][ix][iz] = uoz_p[iy][ix][iz] + uoz_s[iy][ix][iz];
uox[iy][ix][iz] = uox_p[iy][ix][iz] + uox_s[iy][ix][iz];
uoy[iy][ix][iz] = uoy_p[iy][ix][iz] + uoy_s[iy][ix][iz];
/*upz[iy][ix][iz]=sf_cmplx(0.,0.); upx[iy][ix][iz]=sf_cmplx(0.,0.); upy[iy][ix][iz]=sf_cmplx(0.,0.);*/
}
}
}
/*------------------------------------------------------------*/
/* free surface */
/*------------------------------------------------------------*/
if(fsrf) { /* need to do something here */ }
/*------------------------------------------------------------*/
/* inject displacement source */
/*------------------------------------------------------------*/
if(esou) {
/* exploding force source */
lint3d_expl_complex(uoz,uox,uoy,ww[it],cs);
} else {
if(nbell) {
lint3d_bell_complex(uoz,ww[it][0],cs);
lint3d_bell_complex(uox,ww[it][1],cs);
lint3d_bell_complex(uoy,ww[it][2],cs);
} else {
lint3d_inject_complex(uoz,ww[it][0],cs);
lint3d_inject_complex(uox,ww[it][1],cs);
lint3d_inject_complex(uoy,ww[it][2],cs);
}
}
/*------------------------------------------------------------*/
/* cut wavefield and save */
/*------------------------------------------------------------*/
if(snap && (it-shft)%jsnap==0) {
/* P wave */
cut3d_complex(uoz_p,uc,fdm,acz,acx,acy);
sf_complexwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfp);
cut3d_complex(uox_p,uc,fdm,acz,acx,acy);
sf_complexwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfp);
cut3d_complex(uoy_p,uc,fdm,acz,acx,acy);
sf_complexwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfp);
/* S wave */
cut3d_complex(uoz_s,uc,fdm,acz,acx,acy);
sf_complexwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfs);
cut3d_complex(uox_s,uc,fdm,acz,acx,acy);
sf_complexwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfs);
cut3d_complex(uoy_s,uc,fdm,acz,acx,acy);
sf_complexwrite(uc[0][0],sf_n(acx)*sf_n(acy)*sf_n(acz),Fwfs);
}
lint3d_extract_complex(uoz,dd[0],cr);
lint3d_extract_complex(uox,dd[1],cr);
lint3d_extract_complex(uoy,dd[2],cr);
if(it%jdata==0) sf_complexwrite(dd[0],nr*nc,Fdat);
}
if(verb) sf_warning(".");
if(verb) fprintf(stderr,"\n");
/*------------------------------------------------------------*/
/* deallocate arrays */
free(dft);
dft3d_finalize();
free(clr_p); free(clr_s);
clr3d_finalize();
free(**ww); free(*ww); free(ww);
free(ss);
free(rr);
free(*dd); free(dd);
free(n2s_p); free(n2s_s);
free(*lt_p); free(lt_p); free(*rt_p); free(rt_p);
free(*lt_s); free(lt_s); free(*rt_s); free(rt_s);
free(**uoz ); free(*uoz ); free(uoz) ;
free(**uoz_p); free(*uoz_p); free(uoz_p);
free(**uoz_s); free(*uoz_s); free(uoz_s);
/*free(**upz); free(*upz); free(upz);*/
free(uo); free(uo_p); free(uo_s);
/*free(up);*/
if (snap) {
free(**uc); free(*uc); free(uc);
}
/*------------------------------------------------------------*/
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,isreversed;
sf_file Fs,Fr,Fi,Fc; /* I/O files */
sf_axis az,ax,at,ac,aa; /* cube axes */
int nz,nx,nt, nhx, nhz, nht,nc;
int it, ihx, ihz, iht,ic;
int nhx2,nhz2,nht2;
off_t iseek;
float ***us=NULL,***ur=NULL,****ii=NULL;
pt2d *cc=NULL;
bool *ccin=NULL;
float cxmin,czmin;
float cxmax,czmax;
int icx, icz;
int mcx, mcz, mct;
int pcx, pcz, pct;
int **mcxall, **pcxall;
int **mczall, **pczall;
int *mctall, *pctall;
int lht;
float scale;
/* gaussian taper */
bool gaus;
float gsx,gsz,gst; /* std dev */
float gx, gz, gt;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
/* OMP parameters */
#ifdef _OPENMP
omp_init();
#endif
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("isreversed",&isreversed)) isreversed=false; /* reversed rec wfld? */
Fs = sf_input ("in" ); /* source wavefield */
Fr = sf_input ("ur" ); /* receiver wavefield */
Fc = sf_input ("cc" ); /* CIP coordinates */
Fi = sf_output("out"); /* image */
/*------------------------------------------------------------*/
/* read axes */
az=sf_iaxa(Fs,1); nz = sf_n(az);
ax=sf_iaxa(Fs,2); nx = sf_n(ax);
at=sf_iaxa(Fs,3); nt = sf_n(at);
/* CIP coordinates */
ac = sf_iaxa(Fc,2); sf_setlabel(ac,"cc"); sf_setunit(ac,"");
nc = sf_n(ac);
if(! sf_getint("nhz",&nhz)) nhz=0; nhz2=2*nhz+1; /* z lags */
if(! sf_getint("nhx",&nhx)) nhx=0; nhx2=2*nhx+1; /* x lags */
if(! sf_getint("nht",&nht)) nht=0; nht2=2*nht+1; /* t lags */
lht=2*nht;
if(verb) {
sf_warning("nhx=%3d nhz=%3d nht=%3d",nhx2,nhz2,nht2);
sf_raxa(az);
sf_raxa(ax);
sf_raxa(at);
sf_raxa(ac);
}
/* set output axes */
aa=sf_maxa(nhz2,-nhz*sf_d(az),sf_d(az));
sf_setlabel(aa,"hz"); sf_setunit(aa,"");
if(verb) sf_raxa(aa);
sf_oaxa(Fi,aa,1);
aa=sf_maxa(nhx2,-nhx*sf_d(ax),sf_d(ax));
sf_setlabel(aa,"hx"); sf_setunit(aa,"");
if(verb) sf_raxa(aa);
sf_oaxa(Fi,aa,2);
aa=sf_maxa(nht2,-nht*sf_d(at),sf_d(at));
sf_setlabel(aa,"ht"); sf_setunit(aa,"");
if(verb) sf_raxa(aa);
sf_oaxa(Fi,aa,3);
sf_oaxa(Fi,ac,4);
if(! sf_getbool("gaus",&gaus)) gaus=false; /* Gaussian taper flag */
if(gaus) {
if(! sf_getfloat("gsx",&gsx)) gsx=nhx*sf_d(ax); gsx=1./(2*gsx*gsx);
if(! sf_getfloat("gsz",&gsz)) gsz=nhz*sf_d(az); gsz=1./(2*gsz*gsz);
if(! sf_getfloat("gst",&gst)) gst=nht*sf_d(at); gst=1./(2*gst*gst);
}
/*------------------------------------------------------------*/
/* allocate work arrays */
us=sf_floatalloc3(nz,nx,nht2);
ur=sf_floatalloc3(nz,nx,nht2);
ii=sf_floatalloc4(nhz2,nhx2,nht2,nc);
/* zero output */
for(ic=0; ic<nc; ic++) {
for (iht=0; iht<nht2; iht++) {
for (ihx=0; ihx<nhx2; ihx++) {
for(ihz=0; ihz<nhz2; ihz++) {
ii[ic][iht][ihx][ihz] = 0;
}
}
}
}
/*------------------------------------------------------------*/
/* CIP coordinates */
cc= (pt2d*) sf_alloc(nc,sizeof(*cc));
pt2dread1(Fc,cc,nc,2);
mcxall=sf_intalloc2(nhx2,nc);
pcxall=sf_intalloc2(nhx2,nc);
mczall=sf_intalloc2(nhz2,nc);
pczall=sf_intalloc2(nhz2,nc);
ccin=sf_boolalloc(nc);
cxmin = sf_o(ax) + nhx *sf_d(ax);
cxmax = sf_o(ax) + (sf_n(ax)-1-nhx)*sf_d(ax);
czmin = sf_o(az) + nhz *sf_d(az);
czmax = sf_o(az) + (sf_n(az)-1-nhz)*sf_d(az);
if(verb) {
sf_warning("cxmin=%f,cxmax=%f",cxmin,cxmax);
sf_warning("czmin=%f,czmax=%f",czmin,czmax);
}
for(ic=0; ic<nc; ic++) {
ccin[ic]=(cc[ic].x>=cxmin && cc[ic].x<=cxmax &&
cc[ic].z>=czmin && cc[ic].z<=czmax)?true:false;
if(ccin[ic]) {
icx = 0.5+(cc[ic].x-sf_o(ax))/sf_d(ax);
for(ihx=-nhx; ihx<nhx+1; ihx++) {
mcxall[ic][nhx+ihx] = icx-ihx;
pcxall[ic][nhx+ihx] = icx+ihx;
}
icz = 0.5+(cc[ic].z-sf_o(az))/sf_d(az);
for(ihz=-nhz; ihz<nhz+1; ihz++) {
mczall[ic][nhz+ihz] = icz-ihz;
pczall[ic][nhz+ihz] = icz+ihz;
}
}
}
mctall=sf_intalloc(nht2);
pctall=sf_intalloc(nht2);
for (iht=0; iht<nht2; iht++) {
mctall[iht]=iht;
pctall[iht]=2*nht-iht;
}
/*------------------------------------------------------------*/
if(isreversed) { /* receiver wavefield is reversed */
/* read wavefield @ [0...2nht-1]*/
for(iht=0;iht<2*nht;iht++) {
sf_floatread(us[iht][0],nz*nx,Fs);
sf_floatread(ur[iht][0],nz*nx,Fr);
}
if(verb) fprintf(stderr,"nt\n");
for(it=nht;it<nt-nht;it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b\b\b\b\b\b%04d",it);
/* read wavefield @ [2nht]*/
sf_floatread(us[ lht ][0],nz*nx,Fs);
sf_floatread(ur[ lht ][0],nz*nx,Fr);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic) \
private(ic, \
ihx,ihz,iht, \
mcx,mcz,mct, \
pcx,pcz,pct) \
shared (nc,ii,us,ur, \
nhx2, nhz2, nht2, \
mcxall,mczall,mctall, \
pcxall,pczall,pctall,ccin)
#endif
for(ic=0; ic<nc; ic++) {
if(ccin[ic]) {
for (iht=0; iht<nht2; iht++) { mct=mctall [iht]; pct=pctall [iht];
for (ihx=0; ihx<nhx2; ihx++) { mcx=mcxall[ic][ihx]; pcx=pcxall[ic][ihx];
for(ihz=0; ihz<nhz2; ihz++) { mcz=mczall[ic][ihz]; pcz=pczall[ic][ihz];
ii[ic][iht][ihx][ihz] += us[mct][mcx][mcz]*ur[pct][pcx][pcz];
} /* ihz */
} /* ihx */
} /* iht */
}
} /* ic */
/* update wavefield index (cycle) */
for(iht=0;iht<nht2;iht++) {
mctall[iht] = (mctall[iht]+1) % nht2;
pctall[iht] = (pctall[iht]+1) % nht2;
}
lht = (lht+1) % nht2;
} /* it */
if(verb) fprintf(stderr,"\n");
} else { /* receiver wavefield is NOT reversed */
/* read wavefield @ [0...2nht-1]*/
for(iht=0;iht<2*nht;iht++) {
sf_floatread(us[iht][0],nz*nx,Fs);
iseek = (off_t)(nt-1-iht)*nz*nx*sizeof(float);
sf_seek(Fr,iseek,SEEK_SET);
sf_floatread(ur[iht][0],nz*nx,Fr);
}
if(verb) fprintf(stderr,"nt\n");
for(it=nht;it<nt-nht;it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b\b\b\b\b\b%04d",nt-nht-1-it);
/* read wavefield @ [2nht]*/
sf_floatread(us[ lht ][0],nz*nx,Fs);
iseek=(off_t)(nt-nht-1-it)*nz*nx*sizeof(float);
sf_seek(Fr,iseek,SEEK_SET);
sf_floatread(ur[ lht ][0],nz*nx,Fr);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic) \
private(ic, \
ihx,ihz,iht, \
mcx,mcz,mct, \
pcx,pcz,pct) \
shared (nc,ii,us,ur, \
nhx2, nhz2, nht2, \
mcxall,mczall,mctall, \
pcxall,pczall,pctall,ccin)
#endif
for(ic=0; ic<nc; ic++) {
if(ccin[ic]) {
for (iht=0; iht<nht2; iht++) { mct=mctall [iht]; pct=pctall [iht];
for (ihx=0; ihx<nhx2; ihx++) { mcx=mcxall[ic][ihx]; pcx=pcxall[ic][ihx];
for(ihz=0; ihz<nhz2; ihz++) { mcz=mczall[ic][ihz]; pcz=pczall[ic][ihz];
ii[ic][iht][ihx][ihz] += us[mct][mcx][mcz]*ur[pct][pcx][pcz];
} /* ihz */
} /* ihx */
} /* iht */
}
} /* ic */
/* update wavefield index (cycle) */
for(iht=0;iht<nht2;iht++) {
mctall[iht] = (mctall[iht]+1) % nht2;
pctall[iht] = (pctall[iht]+1) % nht2;
}
lht = (lht+1) % nht2;
} /* it */
if(verb) fprintf(stderr,"\n");
} /* end "is reversed" */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* scale image */
scale = 1./nt;
for(ic=0; ic<nc; ic++) {
for (iht=0; iht<nht2; iht++) {
for (ihx=0; ihx<nhx2; ihx++) {
for(ihz=0; ihz<nhz2; ihz++) {
ii[ic][iht][ihx][ihz] *= scale;
}
}
}
}
/*------------------------------------------------------------*/
/* apply Gaussian taper */
if(gaus) {
for(ic=0; ic<nc; ic++) {
for (iht=0;iht<nht2;iht++) { gt=(iht-nht)*sf_d(at); gt*=gt;
for (ihx=0;ihx<nhx2;ihx++) { gx=(ihx-nhx)*sf_d(ax); gx*=gx;
for(ihz=0;ihz<nhz2;ihz++) { gz=(ihz-nhz)*sf_d(az); gz*=gz;
ii[ic][iht][ihx][ihz] *= exp(-gt*gst - gx*gsx - gz*gsz);
}
}
}
}
}
/*------------------------------------------------------------*/
/* write image */
sf_floatwrite(ii[0][0][0],nc*(nhx2)*(nhz2)*(nht2),Fi);
/*------------------------------------------------------------*/
/* deallocate arrays */
free(***ii); free(**ii); free(*ii); free(ii);
free(*us); free(us);
free(*ur); free(ur);
free(cc);
free(ccin);
free(*mcxall); free(mcxall);
free(*pcxall); free(pcxall);
free(*mczall); free(mczall);
free(*pczall); free(pczall);
/*------------------------------------------------------------*/
exit (0);
}
int main(int argc, char* argv[])
{
bool verb;
bool adj;
bool anis;
sf_file Fcip=NULL; /* lag-domain CIPs */
sf_file Fang=NULL; /* angle-domain CIPs */
sf_file Fvel=NULL; /* velocity @ CIPs */
sf_file Fnor=NULL; /* normals @ CIPs */
sf_file Ftlt=NULL; /* tilt @ CIPs */
sf_file Fani=NULL; /* anisotropy @ CIPs */
sf_axis ahx,ahy,ahz,aht,ac,ath,aph,aps,aj;
int ihx,ihy,ihz,iht,ic,ith,iph;
/* angle parameters */
int nth,nph,nps,nhx,nhy,nhz,nht;
float oth,oph,ops,ohx,ohy,ohz,oht;
float dth,dph,dps,dhx,dhy,dhz,dht;
float phi;
float tht;
float psi;
float v_s,v_r;
float cosum,codif,sitovel;
/* arrays 1 2 3 4 */
float ****cip; /* nhx-nhy-nhz-nht */
float **ang; /* nph-nth */
float *vep; /* nc */
float *ves; /* nc */
float *eps=NULL; /* nc */
float *dlt=NULL; /* nc */
vc3d vv; /* azimuth reference vector */
vc3d *nn; /* normal vectors */
vc3d *tt=NULL; /* tilt vectors */
vc3d *aa; /* in-plane reference vector */
vc3d qq;
vc3d jk; /* temp vector */
float hx,hy,hz;
float tau; /* time lag */
int jht; /* tau axis index */
float fht; /* tau axis weight */
float ssn; /* slant-stack normalization */
float *ttipar;
/*-----------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
#ifdef _OPENMP
omp_init(); /* OMP parameters */
#endif
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("anis",&anis)) anis=false; /* anisotropy flag */
if(! sf_getbool("adj", &adj)) adj=true; /* adj flag */
/*
* ADJ: cip to ang
* FOR: ang to cip
*/
sf_warning("verb=%d",verb);
sf_warning("anis=%d",anis);
/* select anisotropy model */
if(anis) sf_warning("ANI model");
else sf_warning("ISO model");
if(adj) {
Fcip=sf_input ( "in"); /* CIP file */
Fang=sf_output("out"); /* ANG file */
} else {
Fcip=sf_output("out"); /* CIP file */
Fang=sf_input ("in"); /* ANG file */
}
Fvel=sf_input ("vel"); /* velocity file */
Fnor=sf_input ("nor"); /* normal vectors */
if(anis) {
Ftlt=sf_input ("tlt"); /* tilt vectors */
Fani=sf_input ("ani"); /* anisotropy */
}
aj = sf_maxa(1,0,1);
if(adj) {
/* input axes */
ahx = sf_iaxa(Fcip,1); sf_setlabel(ahx,"hx");
ahy = sf_iaxa(Fcip,2); sf_setlabel(ahy,"hy");
ahz = sf_iaxa(Fcip,3); sf_setlabel(ahz,"hz");
aht = sf_iaxa(Fcip,4); sf_setlabel(aht,"ht");
/* CIP axis */
ac = sf_iaxa(Fcip,5); sf_setlabel(ac ,"c ");
/* reflection angle */
if(! sf_getint ("nth",&nth)) nth=90;
if(! sf_getfloat("oth",&oth)) oth=0;
if(! sf_getfloat("dth",&dth)) dth=1.;
ath = sf_maxa(nth,oth,dth);
sf_setlabel(ath,"th");
sf_setunit (ath,"deg");
/* azimuth angle */
if(! sf_getint ("nph",&nph)) nph=360;
if(! sf_getfloat("oph",&oph)) oph=-180;
if(! sf_getfloat("dph",&dph)) dph=1.;
aph = sf_maxa(nph,oph,dph);
sf_setlabel(aph,"ph");
sf_setunit (aph,"deg");
/* output axes */
sf_oaxa(Fang,ath,1);
sf_oaxa(Fang,aph,2);
sf_oaxa(Fang,ac ,3);
sf_oaxa(Fang,aj ,4);
sf_oaxa(Fang,aj ,5);
} else {
/* lag in x */
if(! sf_getint ("nhx",&nhx)) nhx=1;
if(! sf_getfloat("ohx",&ohx)) ohx=0;
if(! sf_getfloat("dhx",&dhx)) dhx=1.;
ahx = sf_maxa(nhx,ohx,dhx);
sf_setlabel(ahx,"hx");
sf_setunit (ahx,"");
/* lag in y */
if(! sf_getint ("nhy",&nhy)) nhy=1;
if(! sf_getfloat("ohy",&ohy)) ohy=0;
if(! sf_getfloat("dhy",&dhy)) dhy=1.;
ahy = sf_maxa(nhy,ohy,dhy);
sf_setlabel(ahy,"hy");
sf_setunit (ahy,"");
/* lag in z */
nhz=1;
ohz=0.;
dhz=1.;
ahz = sf_maxa(nhz,ohz,dhz);
sf_setlabel(ahz,"hz");
sf_setunit (ahz,"");
/* lag in t */
if(! sf_getint ("nht",&nht)) nht=1;
if(! sf_getfloat("oht",&oht)) oht=0.;
if(! sf_getfloat("dht",&dht)) dht=1.;
aht = sf_maxa(nht,oht,dht);
sf_setlabel(aht,"ht");
sf_setunit (aht,"");
/* reflection angle */
ath = sf_iaxa(Fang,1); sf_setlabel(ath,"th");
/* azimuth angle */
aph = sf_iaxa(Fang,2); sf_setlabel(aph,"ph");
/* CIP axis */
ac = sf_iaxa(Fang,3); sf_setlabel(ac ,"c ");
/* output axes */
sf_oaxa(Fcip,ahx,1);
sf_oaxa(Fcip,ahy,2);
sf_oaxa(Fcip,ahz,3);
sf_oaxa(Fcip,aht,4);
sf_oaxa(Fcip,ac ,5);
}
if (verb){
sf_raxa(ahx);
sf_raxa(ahy);
sf_raxa(ahz);
sf_raxa(aht);
sf_raxa(ac);
sf_raxa(ath);
sf_raxa(aph);
}
if(anis) {
/* deviation angle */
if(! sf_getint ("nps",&nps)) nps=251;
if(! sf_getfloat("ops",&ops)) ops=-25;
if(! sf_getfloat("dps",&dps)) dps=0.2;
aps = sf_maxa(nps,ops,dps);
sf_setlabel(aps,"ps");
sf_setunit (aps,"deg");
if(verb) sf_raxa(aps);
} else {
aps = NULL;
}
/*------------------------------------------------------------*/
/* allocate arrays */
cip = sf_floatalloc4 (sf_n(ahx),sf_n(ahy),sf_n(ahz),sf_n(aht));
ang = sf_floatalloc2 (sf_n(ath),sf_n(aph));
/* read velocity */
vep = sf_floatalloc (sf_n(ac));
sf_floatread(vep,sf_n(ac),Fvel);
ves = sf_floatalloc (sf_n(ac));
sf_floatread(ves,sf_n(ac),Fvel);
/*------------------------------------------------------------*/
/* read normals */
nn = (vc3d*) sf_alloc(sf_n(ac),sizeof(*nn)); /* normals */
vc3dread1(Fnor,nn,sf_n(ac));
if(anis) {
/* read anisotropy */
eps = sf_floatalloc (sf_n(ac));
sf_floatread(eps,sf_n(ac),Fani);
dlt = sf_floatalloc (sf_n(ac));
sf_floatread(dlt,sf_n(ac),Fani);
/* read tilts */
tt = (vc3d*) sf_alloc(sf_n(ac),sizeof(*tt));
vc3dread1(Ftlt,tt,sf_n(ac));
}
/*------------------------------------------------------------*/
/* in-plane azimuth reference */
vv.dx=1;
vv.dy=0;
vv.dz=0;
aa = (vc3d*) sf_alloc(sf_n(ac),sizeof(*aa));
for(ic=0;ic<sf_n(ac);ic++) {
jk =vcp3d(&nn[ic],&vv);
aa[ic]=vcp3d(&jk,&nn[ic]);
}
/*------------------------------------------------------------*/
ssn = 1./sqrt(sf_n(ahx)*sf_n(ahy)*sf_n(ahz));
/*------------------------------------------------------------*/
/* loop over CIPs */
/* if(verb) fprintf(stderr,"ic\n");*/
for(ic=0;ic<sf_n(ac);ic++) {
/* if(verb) fprintf(stderr,"\b\b\b\b\b%d",ic);*/
if(adj) {
/* read CIP */
sf_floatread(cip[0][0][0],sf_n(ahx)*sf_n(ahy)*sf_n(ahz)*sf_n(aht),Fcip);
/* init ANG */
for (iph=0;iph<sf_n(aph);iph++) {
for(ith=0;ith<sf_n(ath);ith++) {
ang[iph][ith]=0;
}
}
} else {
/* init CIP */
for (iht=0;iht<sf_n(aht);iht++) {
for (ihz=0;ihz<sf_n(ahz);ihz++) {
for (ihy=0;ihy<sf_n(ahy);ihy++) {
for(ihx=0;ihx<sf_n(ahx);ihx++) {
cip[iht][ihz][ihy][ihx]=0;
}
}
}
}
/* read ANG */
sf_floatread(ang[0],sf_n(ath)*sf_n(aph),Fang);
}
/* phi loop */
nph = sf_n(aph);
#ifdef _OPENMP
#pragma omp parallel for schedule(static) \
private(iph,phi,jk,qq, \
ith,tht, \
ihy,ihx,hy,hx,hz, \
tau,jht,fht,cosum,codif,v_s,v_r,psi,sitovel) \
shared( nph,aph,ath,aps,ahy,ahx,aht,cip,ang,vep,ves,eps,dlt)
#endif
for(iph=0;iph<nph;iph++) {
phi=(180+sf_o(aph)+iph*sf_d(aph))/180.*SF_PI;
/* use '180' to reverse illumination direction: */
/* at a CIP, look toward the source */
/* reflection azimuth vector */
jk = rot3d(nn,aa,phi);
qq = nor3d(&jk);
/* theta loop */
for(ith=0;ith<sf_n(ath);ith++) {
tht=(sf_o(ath)+ith*sf_d(ath))/180.*SF_PI;
if(anis) {
ttipar = psitti(nn,&qq,tt,aa,
tht,phi,aps,
vep[ic],ves[ic],eps[ic],dlt[ic]);
psi = ttipar[0];
v_s = ttipar[1];
v_r = ttipar[2];
psi *= SF_PI/180.;
cosum = cosf(tht+psi);
codif = cosf(tht-psi);
sitovel = sinf(2*tht)/(v_s*cosum + v_r*codif);
} else {
sitovel = sinf(tht)/vep[ic];
}
/* lag loops */
if(adj) {
for (ihy=0;ihy<sf_n(ahy);ihy++) { hy=sf_o(ahy)+ihy*sf_d(ahy);
for(ihx=0;ihx<sf_n(ahx);ihx++) { hx=sf_o(ahx)+ihx*sf_d(ahx);
hz = -(hx*(nn[ic].dx)+hy*(nn[ic].dy))/(nn[ic].dz);
tau = -((qq.dx)*hx+(qq.dy)*hy+(qq.dz)*hz)*sitovel;
jht=0.5+(tau-sf_o(aht))/sf_d(aht);
if(jht>=0 && jht<sf_n(aht)-1) {
fht= (tau-sf_o(aht))/sf_d(aht)-jht;
ang[iph][ith] += (1-fht)*ssn*cip[jht ][0][ihy][ihx]
+ fht *ssn*cip[jht+1][0][ihy][ihx];
}
} /* hx */
} /* hy */
} else {
for (ihy=0;ihy<sf_n(ahy);ihy++) { hy=sf_o(ahy)+ihy*sf_d(ahy);
for(ihx=0;ihx<sf_n(ahx);ihx++) { hx=sf_o(ahx)+ihx*sf_d(ahx);
hz = -(hx*(nn[ic].dx)+hy*(nn[ic].dx))/(nn[ic].dz);
tau = -((qq.dx)*hx+(qq.dy)*hy+(qq.dz)*hz)*sitovel;
jht=0.5+(tau-sf_o(aht))/sf_d(aht);
if(jht>=0 && jht<sf_n(aht)-1) {
fht= (tau-sf_o(aht))/sf_d(aht)-jht;
cip[jht ][0][ihy][ihx] += (1-fht)*ssn*ang[iph][ith];
cip[jht+1][0][ihy][ihx] += fht *ssn*ang[iph][ith];
}
} /* hx */
} /* hy */
}
} /* th */
} /* ph */
if(adj) {
/* write ANG */
sf_floatwrite(ang[0],sf_n(ath)*sf_n(aph),Fang);
} else {
/* write CIP */
sf_floatwrite(cip[0][0][0],sf_n(ahx)*sf_n(ahy)*sf_n(ahz)*sf_n(aht),Fcip);
}
}
if(verb) fprintf(stderr,"\n");
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"free memory...");
free(***cip);free(**cip);free(*cip);free(cip);
; free(*ang);free(ang);
; free(vep);
; free (nn);
; free (aa);
if(anis) {
free(ves);
free(eps);
free(dlt);
free(tt);
}
if(verb) fprintf(stderr,"OK\n");
/*------------------------------------------------------------*/
exit(0);
}
int main(int argc, char *argv[])
{
bool wantwf, verb;
int ix, iz, is, it, wfit, im, ik, i, j, itau;
int ns, nx, nz, nt, wfnt, rnx, rnz, nzx, rnzx, vnx, ntau, htau, nds;
int scalet, snap, snapshot, fnx, fnz, fnzx, nk, nb;
int rectx, rectz, repeat, gpz, n, m, pad1, trunc, spx, spz;
float dt, t0, z0, dz, x0, dx, s0, ds, wfdt, srctrunc;
float dtau, tau0, tau;
int nr, ndr, nr0;
char *path1, *path2, number[5], *left, *right;
double tstart, tend;
struct timeval tim;
/*wavenumber domain tapering*/
int taper;
float *ktp;
float ktmp,kx_trs,kz_trs,thresh;
float dkx,dkz,kx0,kz0;
float kx,kz;
int nkz;
sf_complex c, **lt, **rt;
sf_complex *ww, **dd, ***dd3;
float ***img1, **img2, ***mig1, **mig2;
float *rr, **ccr, **sill, ***fwf, ***bwf;
sf_complex *cwave, *cwavem, **wave, *curr;
sf_axis at, ax, az, atau;
sf_file Fdat, Fsrc, Fimg1, Fimg2;
sf_file Ffwf, Fbwf, Fvel;
sf_file Fleft, Fright;
int cpuid, numprocs, nth, nspad, iturn;
float *sendbuf, *recvbuf;
sf_complex *sendbufc, *recvbufc;
MPI_Comm comm=MPI_COMM_WORLD;
MPI_Init(&argc, &argv);
MPI_Comm_rank(comm, &cpuid);
MPI_Comm_size(comm, &numprocs);
sf_init(argc, argv);
#ifdef _OPENMP
#pragma omp parallel
{
nth=omp_get_num_threads();
}
sf_warning(">>> Using %d threads <<<", nth);
#endif
gettimeofday(&tim, NULL);
tstart=tim.tv_sec+(tim.tv_usec/1000000.0);
if (!sf_getint("taper",&taper)) taper=0; /* tapering in the frequency domain */
if (!sf_getfloat("thresh",&thresh)) thresh=0.92; /* tapering threshold */
if(!sf_getbool("wantwf", &wantwf)) wantwf=false;
if(!sf_getbool("verb", &verb)) verb=false;
if(!sf_getint("pad1", &pad1)) pad1=1;
/* padding factor on the first axis */
if(!sf_getint("nb", &nb)) sf_error("Need nb= ");
if(!sf_getfloat("srctrunc", &srctrunc)) srctrunc=0.4;
if(!sf_getint("rectx", &rectx)) rectx=2;
if(!sf_getint("rectz", &rectz)) rectz=2;
if(!sf_getint("repeat", &repeat)) repeat=2;
if(!sf_getint("scalet", &scalet)) scalet=1;
if(!sf_getint("snap", &snap)) snap=100;
/* interval of the output wavefield */
if(!sf_getint("snapshot", &snapshot)) snapshot=0;
/* print out the wavefield snapshots of this shot */
if(!sf_getint("nds", &nds)) sf_error("Need nds=!");
/* source and receiver positions */
if(!sf_getint("gpz", &gpz)) sf_error("Need gpz=");
if(!sf_getint("spx", &spx)) sf_error("Need spx=");
if(!sf_getint("spz", &spz)) sf_error("Need spz=");
/* tau parameters */
if(!sf_getint("ntau", &ntau)) sf_error("Need ntau=");
if(!sf_getfloat("dtau", &dtau)) sf_error("Need dtau=");
if(!sf_getfloat("tau0", &tau0)) sf_error("Need tau0=");
/* geometry parameters */
if(!sf_getint("rnx", &rnx)) sf_error("Need rnx=");
if(!sf_getint("ndr", &ndr)) ndr=1;
if(!sf_getint("nr0", &nr0)) nr0=0;
/* input/output files */
Fdat=sf_input("--input");
Fimg1=sf_output("--output");
Fimg2=sf_output("Fimg2");
Fsrc=sf_input("Fsrc");
Fvel=sf_input("Fpadvel");
if(wantwf){
Ffwf=sf_output("Ffwf");
Fbwf=sf_output("Fbwf");
}
at=sf_iaxa(Fsrc, 1); nt=sf_n(at); dt=sf_d(at); t0=sf_o(at);
ax=sf_iaxa(Fvel, 2); vnx=sf_n(ax); dx=sf_d(ax); x0=sf_o(ax);
az=sf_iaxa(Fvel, 1); rnz=sf_n(az); dz=sf_d(az); z0=sf_o(az);
if(!sf_histint(Fdat, "n2", &nr)) sf_error("Need n2= in input!");
if(!sf_histint(Fdat, "n3", &ns)) sf_error("Need n3= in input!");
if(!sf_histfloat(Fdat, "d3", &ds)) sf_error("Need d3= in input!");
if(!sf_histfloat(Fdat, "o3", &s0)) sf_error("Need o3= in input!");
wfnt=(nt-1)/scalet+1;
wfdt=dt*scalet;
/* double check the geometry parameters */
if(nds != (int)(ds/dx)) sf_error("Need ds/dx= %d", nds);
//sf_warning("s0=%g, x0+(rnx-1)*dx/2=%g", s0, x0+(rnx-1)*dx/2);
//if(s0 != x0+(rnx-1)*dx/2) sf_error("Wrong origin information!");
if(vnx != nds*(ns-1)+rnx) sf_error("Wrong dimension in x axis!");
/* set up the output files */
atau=sf_iaxa(Fsrc, 1);
sf_setn(atau, ntau);
sf_setd(atau, dtau);
sf_seto(atau, tau0);
sf_setlabel(atau, "Tau");
sf_setunit(atau, "s");
sf_oaxa(Fimg1, az, 1);
sf_oaxa(Fimg1, ax, 2);
sf_oaxa(Fimg1, atau, 3);
sf_oaxa(Fimg2, az, 1);
sf_oaxa(Fimg2, ax, 2);
sf_putint(Fimg2, "n3", 1);
sf_settype(Fimg1, SF_FLOAT);
sf_settype(Fimg2, SF_FLOAT);
if(wantwf){
sf_setn(ax, rnx);
sf_seto(ax, -(rnx-1)*dx/2.0);
sf_oaxa(Ffwf, az, 1);
sf_oaxa(Ffwf, ax, 2);
sf_putint(Ffwf, "n3", (wfnt-1)/snap+1);
sf_putfloat(Ffwf, "d3", snap*wfdt);
sf_putfloat(Ffwf, "o3", t0);
sf_putstring(Ffwf, "label3", "Time");
sf_putstring(Ffwf, "unit3", "s");
sf_settype(Ffwf, SF_FLOAT);
sf_oaxa(Fbwf, az, 1);
sf_oaxa(Fbwf, ax, 2);
sf_putint(Fbwf, "n3", (wfnt-1)/snap+1);
sf_putfloat(Fbwf, "d3", -snap*wfdt);
sf_putfloat(Fbwf, "o3", (wfnt-1)*wfdt);
sf_putstring(Fbwf, "label3", "Time");
sf_putstring(Fbwf, "unit3", "s");
sf_settype(Fbwf, SF_FLOAT);
}
nx=rnx+2*nb; nz=rnz+2*nb;
nzx=nx*nz; rnzx=rnz*rnx;
nk=cfft2_init(pad1, nz, nx, &fnz, &fnx);
fnzx=fnz*fnx;
if(ns%numprocs==0) nspad=ns;
else nspad=(ns/numprocs+1)*numprocs;
/* print axies parameters for double check */
sf_warning("cpuid=%d, numprocs=%d, nspad=%d", cpuid, numprocs, nspad);
sf_warning("nt=%d, dt=%g, scalet=%d, wfnt=%d, wfdt=%g",nt, dt, scalet, wfnt, wfdt);
sf_warning("vnx=%d, nx=%d, dx=%g, nb=%d, rnx=%d", vnx, nx, dx, nb, rnx);
sf_warning("nr=%d, ndr=%d, nr0=%g", nr, ndr, nr0);
sf_warning("nz=%d, rnz=%d, dz=%g, z0=%g", nz, rnz, dz, z0);
sf_warning("spx=%d, spz=%d, gpz=%d", spx, spz, gpz);
sf_warning("ns=%d, ds=%g, s0=%g", ns, ds, s0);
sf_warning("ntau=%d, dtau=%g, tau0=%g", ntau, dtau, tau0);
sf_warning("nzx=%d, fnzx=%d, nk=%d", nzx, fnzx, nk);
/* allocate storage and read data */
ww=sf_complexalloc(nt);
sf_complexread(ww, nt, Fsrc);
sf_fileclose(Fsrc);
gpz=gpz+nb;
spz=spz+nb;
spx=spx+nb;
nr0=nr0+nb;
trunc=srctrunc/dt+0.5;
dd=sf_complexalloc2(nt, nr);
if(cpuid==0) dd3=sf_complexalloc3(nt, nr, numprocs);
rr=sf_floatalloc(nzx);
reflgen(nz, nx, spz, spx, rectz, rectx, repeat, rr);
fwf=sf_floatalloc3(rnz, rnx, wfnt);
bwf=sf_floatalloc3(rnz, rnx, wfnt);
img1=sf_floatalloc3(rnz, vnx, ntau);
img2=sf_floatalloc2(rnz, vnx);
mig1=sf_floatalloc3(rnz, rnx, ntau);
mig2=sf_floatalloc2(rnz, rnx);
ccr=sf_floatalloc2(rnz, rnx);
sill=sf_floatalloc2(rnz, rnx);
curr=sf_complexalloc(fnzx);
cwave=sf_complexalloc(nk);
cwavem=sf_complexalloc(nk);
icfft2_allocate(cwavem);
if (taper!=0) {
dkz = 1./(fnz*dz); kz0 = -0.5/dz;
dkx = 1./(fnx*dx); kx0 = -0.5/dx;
nkz = fnz;
sf_warning("dkz=%f,dkx=%f,kz0=%f,kx0=%f",dkz,dkx,kz0,kx0);
sf_warning("nk=%d,nkz=%d,nkx=%d",nk,nkz,fnx);
kx_trs = thresh*fabs(0.5/dx);
kz_trs = thresh*fabs(0.5/dz);
sf_warning("Applying kz tapering below %f",kz_trs);
sf_warning("Applying kx tapering below %f",kx_trs);
ktp = sf_floatalloc(nk);
/* constructing the tapering op */
for (ix=0; ix < fnx; ix++) {
kx = kx0+ix*dkx;
for (iz=0; iz < nkz; iz++) {
kz = kz0+iz*dkz;
ktmp = 1.;
if (fabs(kx) > kx_trs)
ktmp *= powf((2*kx_trs - fabs(kx))/(kx_trs),2);
if (fabs(kz) > kz_trs)
ktmp *= powf((2*kz_trs - fabs(kz))/(kz_trs),2);
ktp[iz+ix*nkz] = ktmp;
}
}
}
/* initialize image tables that would be used for summing images */
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz, itau)
#endif
for(ix=0; ix<vnx; ix++){
for(iz=0; iz<rnz; iz++){
img2[ix][iz]=0.;
for(itau=0; itau<ntau; itau++){
img1[itau][ix][iz]=0.;
}
}
}
path1=sf_getstring("path1");
path2=sf_getstring("path2");
if(path1==NULL) path1="./mat/left";
if(path2==NULL) path2="./mat/right";
/* shot loop */
for (iturn=0; iturn*numprocs<nspad; iturn++){
is=iturn*numprocs+cpuid;
/* read data */
if(cpuid==0){
sf_seek(Fdat, ((off_t) is)*((off_t) nr)*((off_t) nt)*sizeof(float complex), SEEK_SET);
if((iturn+1)*numprocs<=ns){
sf_complexread(dd3[0][0], nr*nt*numprocs, Fdat);
}else{
sf_complexread(dd3[0][0], nr*nt*(ns-iturn*numprocs), Fdat);
for(is=ns; is<nspad; is++)
for(ix=0; ix<nr; ix++)
for(it=0; it<nt; it++)
dd3[is-iturn*numprocs][ix][it]=sf_cmplx(0.,0.);
is=iturn*numprocs;
}
sendbufc=dd3[0][0];
recvbufc=dd[0];
}else{
sendbufc=NULL;
recvbufc=dd[0];
}
MPI_Scatter(sendbufc, nt*nr, MPI_COMPLEX, recvbufc, nt*nr, MPI_COMPLEX, 0, comm);
if(is<ns){ /* effective shot loop */
/* construct the names of left and right matrices */
left=sf_charalloc(strlen(path1));
right=sf_charalloc(strlen(path2));
strcpy(left, path1);
strcpy(right, path2);
sprintf(number, "%d", is+1);
strcat(left, number);
strcat(right, number);
Fleft=sf_input(left);
Fright=sf_input(right);
if(!sf_histint(Fleft, "n1", &n) || n != nzx) sf_error("Need n1=%d in Fleft", nzx);
if(!sf_histint(Fleft, "n2", &m)) sf_error("No n2 in Fleft");
if(!sf_histint(Fright, "n1", &n) || n != m) sf_error("Need n1=%d in Fright", m);
if(!sf_histint(Fright, "n2", &n) || n != nk) sf_error("Need n2=%d in Fright", nk);
/* allocate storage for each shot migration */
lt=sf_complexalloc2(nzx, m);
rt=sf_complexalloc2(m, nk);
sf_complexread(lt[0], nzx*m, Fleft);
sf_complexread(rt[0], m*nk, Fright);
sf_fileclose(Fleft);
sf_fileclose(Fright);
/* initialize curr and imaging variables */
#ifdef _OPENMP
#pragma omp parallel for private(iz)
#endif
for(iz=0; iz<fnzx; iz++){
curr[iz]=sf_cmplx(0.,0.);
}
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz, itau)
#endif
for(ix=0; ix<rnx; ix++){
for(iz=0; iz<rnz; iz++){
mig2[ix][iz]=0.;
ccr[ix][iz]=0.;
sill[ix][iz]=0.;
for(itau=0; itau<ntau; itau++){
mig1[itau][ix][iz]=0.;
}
}
}
/* wave */
wave=sf_complexalloc2(fnzx, m);
/* snapshot */
if(wantwf && is==snapshot) wantwf=true;
else wantwf=false;
/* forward propagation */
wfit=0;
for(it=0; it<nt; it++){
if(verb) sf_warning("Forward propagation it=%d/%d",it+1, nt);
cfft2(curr, cwave);
for(im=0; im<m; im++){
#ifdef _OPENMP
#pragma omp parallel for private(ik)
#endif
for(ik=0; ik<nk; ik++){
#ifdef SF_HAS_COMPLEX_H
cwavem[ik]=cwave[ik]*rt[ik][im];
#else
cwavem[ik]=sf_cmul(cwave[ik],rt[ik][im]);
#endif
}
icfft2(wave[im],cwavem);
}
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz, i, j, im, c) shared(curr, it)
#endif
for(ix=0; ix<nx; ix++){
for(iz=0; iz<nz; iz++){
i=iz+ix*nz;
j=iz+ix*fnz;
if(it<trunc){
#ifdef SF_HAS_COMPLEX_H
c=ww[it]*rr[i];
#else
c=sf_crmul(ww[it],rr[i]);
#endif
}else{
c=sf_cmplx(0.,0.);
}
// c += curr[j];
for(im=0; im<m; im++){
#ifdef SF_HAS_COMPLEX_H
c += lt[im][i]*wave[im][j];
#else
c += sf_cmul(lt[im][i], wave[im][j]);
#endif
}
curr[j]=c;
}
}
if (taper!=0) {
if (it%taper == 0) {
cfft2(curr,cwave);
for (ik = 0; ik < nk; ik++) {
#ifdef SF_HAS_COMPLEX_H
cwavem[ik] = cwave[ik]*ktp[ik];
#else
cwavem[ik] = sf_crmul(cwave[ik],ktp[ik]);
#endif
}
icfft2(curr,cwavem);
}
}
if(it%scalet==0){
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for(ix=0; ix<rnx; ix++){
for(iz=0; iz<rnz; iz++){
fwf[wfit][ix][iz]=crealf(curr[(ix+nb)*fnz+(iz+nb)]);
}
}
wfit++;
}
} //end of it
/* check wfnt */
if(wfit != wfnt) sf_error("At this point, wfit should be equal to wfnt");
/* backward propagation starts from here... */
#ifdef _OPENMP
#pragma omp parallel for private(iz)
#endif
for(iz=0; iz<fnzx; iz++){
curr[iz]=sf_cmplx(0.,0.);
}
wfit=wfnt-1;
for(it=nt-1; it>=0; it--){
if(verb) sf_warning("Backward propagation it=%d/%d",it+1, nt);
#ifdef _OPENMP
#pragma omp parallel for private(ix)
#endif
for(ix=0; ix<nr; ix++){
curr[(nr0+ix*ndr)*fnz+gpz]+=dd[ix][it];
}
cfft2(curr, cwave);
for(im=0; im<m; im++){
#ifdef _OPENMP
#pragma omp parallel for private(ik)
#endif
for(ik=0; ik<nk; ik++){
#ifdef SF_HAS_COMPLEX_H
cwavem[ik]=cwave[ik]*conjf(rt[ik][im]);
#else
cwavem[ik]=sf_cmul(cwave[ik],conjf(rt[ik][im]));
#endif
}
icfft2(wave[im],cwavem);
}
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz, i, j, im, c) shared(curr, it)
#endif
for(ix=0; ix<nx; ix++){
for(iz=0; iz<nz; iz++){
i=iz+ix*nz;
j=iz+ix*fnz;
// c=curr[j];
c=sf_cmplx(0.,0.);
for(im=0; im<m; im++){
#ifdef SF_HAS_COMPLEX_H
c += conjf(lt[im][i])*wave[im][j];
#else
c += sf_cmul(conjf(lt[im][i]), wave[im][j]);
#endif
}
curr[j]=c;
}
}
if (taper!=0) {
if (it%taper == 0) {
cfft2(curr,cwave);
for (ik = 0; ik < nk; ik++) {
#ifdef SF_HAS_COMPLEX_H
cwavem[ik] = cwave[ik]*ktp[ik];
#else
cwavem[ik] = sf_crmul(cwave[ik],ktp[ik]);
#endif
}
icfft2(curr,cwavem);
}
}
if(it%scalet==0){
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for(ix=0; ix<rnx; ix++){
for(iz=0; iz<rnz; iz++){
bwf[wfit][ix][iz]=crealf(curr[(ix+nb)*fnz+(iz+nb)]);
ccr[ix][iz] += fwf[wfit][ix][iz]*bwf[wfit][ix][iz];
sill[ix][iz] += fwf[wfit][ix][iz]*fwf[wfit][ix][iz];
}
}
wfit--;
}
} //end of it
if(wfit != -1) sf_error("Check program! The final wfit should be -1!");
/* free storage */
free(*rt); free(rt);
free(*lt); free(lt);
free(*wave); free(wave);
free(left); free(right);
/* normalized image */
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for (ix=0; ix<rnx; ix++){
for(iz=0; iz<rnz; iz++){
mig2[ix][iz]=ccr[ix][iz]/(sill[ix][iz]+SF_EPS);
// sill[ix][iz]=0.;
}
}
/* time-shift imaging condition */
for(itau=0; itau<ntau; itau++){
//sf_warning("itau/ntau=%d/%d", itau+1, ntau);
tau=itau*dtau+tau0;
htau=tau/wfdt;
for(it=abs(htau); it<wfnt-abs(htau); it++){
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for(ix=0; ix<rnx; ix++){
for(iz=0; iz<rnz; iz++){
mig1[itau][ix][iz]+=fwf[it+htau][ix][iz]*bwf[it-htau][ix][iz];
// sill[ix][iz]+=fwf[it+htau][ix][iz]*fwf[it+htau][ix][iz];
} // end of iz
} // end of ix
} // end of it
//#ifdef _OPENMP
//#pragma omp parallel for private(ix, iz)
//#endif
/* source illumination */
// for(ix=0; ix<rnx; ix++){
// for(iz=0; iz<rnz; iz++){
// mig1[itau][ix][iz] = mig1[itau][ix][iz]/(sill[ix][iz]+SF_EPS);
// }
// }
} //end of itau
/* output wavefield snapshot */
if(wantwf){
for(it=0; it<wfnt; it++){
if(it%snap==0){
sf_floatwrite(fwf[it][0], rnzx, Ffwf);
sf_floatwrite(bwf[wfnt-1-it][0], rnzx, Fbwf);
}
}
sf_fileclose(Ffwf);
sf_fileclose(Fbwf);
}
/* add all the shot images that are on the same node */
#ifdef _OPENMP
#pragma omp parallel for private(itau, ix, iz)
#endif
for(itau=0; itau<ntau; itau++){
for(ix=0; ix<rnx; ix++){
for(iz=0; iz<rnz; iz++){
img1[itau][ix+is*nds][iz] += mig1[itau][ix][iz];
}
}
}
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for(ix=0; ix<rnx; ix++){
for(iz=0; iz<rnz; iz++){
img2[ix+is*nds][iz] += mig2[ix][iz];
}
}
} // end of is<ns
} // end of iturn
////////////////end of ishot
MPI_Barrier(comm);
cfft2_finalize();
sf_fileclose(Fdat);
free(ww); free(rr);
free(*dd); free(dd);
if(cpuid==0) {free(**dd3); free(*dd3); free(dd3);}
free(cwave); free(cwavem); free(curr);
free(*ccr); free(ccr);
free(*sill); free(sill);
free(**fwf); free(*fwf); free(fwf);
free(**bwf); free(*bwf); free(bwf);
free(**mig1); free(*mig1); free(mig1);
free(*mig2); free(mig2);
/* sum image */
if(cpuid==0){
sendbuf=(float *)MPI_IN_PLACE;
recvbuf=img1[0][0];
}else{
sendbuf=img1[0][0];
recvbuf=NULL;
}
MPI_Reduce(sendbuf, recvbuf, ntau*vnx*rnz, MPI_FLOAT, MPI_SUM, 0, comm);
if(cpuid==0){
sendbuf=MPI_IN_PLACE;
recvbuf=img2[0];
}else{
sendbuf=img2[0];
recvbuf=NULL;
}
MPI_Reduce(sendbuf, recvbuf, vnx*rnz, MPI_FLOAT, MPI_SUM, 0, comm);
/* output image */
if(cpuid==0){
sf_floatwrite(img1[0][0], ntau*vnx*rnz, Fimg1);
sf_floatwrite(img2[0], vnx*rnz, Fimg2);
}
MPI_Barrier(comm);
sf_fileclose(Fimg1);
sf_fileclose(Fimg2);
free(**img1); free(*img1); free(img1);
free(*img2); free(img2);
gettimeofday(&tim, NULL);
tend=tim.tv_sec+(tim.tv_usec/1000000.0);
sf_warning(">> The computing time is %.3lf minutes <<", (tend-tstart)/60.);
MPI_Finalize();
exit(0);
}
int main(int argc, char* argv[])
{
sf_file Fw_s=NULL, Fw_r=NULL;
sf_file Fi=NULL, Fm=NULL, Fr=NULL;
sf_axis ag,at,aw,ar;
int ig,it,iw,ir;
int ng,nt,nw,nr;
int method;
bool verb;
bool adj;
sf_complex **dat_s=NULL, *wfl_s=NULL;
sf_complex **dat_r=NULL, *wfl_r=NULL;
float **img=NULL;
float **aa=NULL,**bb=NULL,**mm=NULL;
sf_complex **ab=NULL;
float **a0=NULL,**b0=NULL;
float w,ws,wr,w0,dw;
char *met="";
sf_init(argc,argv);
if(! sf_getbool("verb", &verb)) verb=false;
if(! sf_getint("method",&method)) method=0; /* extrapolation method */
if(! sf_getbool("adj", &adj)) adj=false;/* y=modeling; n=migration */
Fm = sf_input("abm");
Fr = sf_input("abr");
at=sf_iaxa(Fm,2); sf_setlabel(at,"t"); /* 'extrapolation axis' */
ar=sf_iaxa(Fr,1); sf_setlabel(ar,"r"); /* a,b reference */
if(method==0) sf_setn(ar,1); /* pure F-D */
nr=sf_n(ar);
Fw_s = sf_input ( "in");
if (SF_COMPLEX !=sf_gettype(Fw_s)) sf_error("Need complex source");
/* 'position axis' (could be angle) */
ag = sf_iaxa(Fw_s,1); ng=sf_n(ag); sf_setlabel(ag,"g");
/* 'extrapolation axis' (could be time) */
at = sf_iaxa(Fw_s,2); nt=sf_n(at); sf_setlabel(at,"t");
aw = sf_iaxa(Fw_s,3); sf_setlabel(aw,"w"); /* frequency */
if(adj) { /* modeling */
Fw_r = sf_output("out");
sf_settype(Fw_r,SF_COMPLEX);
Fi = sf_input ("img");
if (SF_FLOAT !=sf_gettype(Fi)) sf_error("Need float image");
sf_oaxa(Fw_r,ag,1);
sf_oaxa(Fw_r,at,2);
sf_oaxa(Fw_r,aw,3);
} else { /* migration */
Fw_r = sf_input ("rwf");
if (SF_COMPLEX !=sf_gettype(Fw_r)) sf_error("Need complex data");
Fi = sf_output("out");
sf_settype(Fi,SF_FLOAT);
sf_oaxa(Fi,ag,1);
sf_oaxa(Fi,at,2);
sf_putint(Fi,"n3",1);
}
img = sf_floatalloc2 (ng,nt);
dat_s = sf_complexalloc2(ng,nt);
dat_r = sf_complexalloc2(ng,nt);
wfl_s = sf_complexalloc (ng);
wfl_r = sf_complexalloc (ng);
if(verb) {
sf_raxa(ag);
sf_raxa(at);
sf_raxa(aw);
sf_raxa(ar);
}
/* read ABM */
aa = sf_floatalloc2 (ng,nt);
bb = sf_floatalloc2 (ng,nt);
mm = sf_floatalloc2 (ng,nt);
sf_floatread(aa[0],ng*nt,Fm); /* a coef */
sf_floatread(bb[0],ng*nt,Fm); /* b coef */
sf_floatread(mm[0],ng*nt,Fm); /* mask */
/* read ABr */
ab = sf_complexalloc2(nr,nt);
a0 = sf_floatalloc2 (nr,nt);
b0 = sf_floatalloc2 (nr,nt);
sf_complexread(ab[0],nr*nt,Fr);
for(it=0;it<nt;it++) {
for(ir=0;ir<nr;ir++) {
a0[it][ir] = crealf(ab[it][ir]);
b0[it][ir] = cimagf(ab[it][ir]);
}
}
/*------------------------------------------------------------*/
switch (method) {
case 3: met="PSC"; break;
case 2: met="FFD"; break;
case 1: met="SSF"; break;
case 0: met="XFD"; break;
}
/* from hertz to radian */
nw = sf_n(aw);
dw = sf_d(aw) * 2.*SF_PI;
w0 = sf_o(aw) * 2.*SF_PI;
rweone_init(ag,at,aw,ar,method,verb);
switch(method) {
case 3: rweone_psc_coef(aa,bb,a0,b0); break;
case 2: rweone_ffd_coef(aa,bb,a0,b0); break;
case 1: ;/* SSF */ break;
case 0: rweone_xfd_coef(aa,bb); break;
}
if(adj) { /* modeling */
} else { /* migration */
for(it=0;it<nt;it++) {
for(ig=0;ig<ng;ig++) {
img[it][ig] = 0.;
}
}
}
/*------------------------------------------------------------*/
if( adj) sf_floatread (img[0],ng*nt,Fi);
for(iw=0;iw<nw;iw++) {
w=w0+iw*dw;
sf_warning("%s %d %d",met,iw,nw);
if(adj) {
sf_complexread(dat_s[0],ng*nt,Fw_s);
ws = -w; /* causal */
for(ig=0;ig<ng;ig++) {
wfl_s[ig] = sf_cmplx(0.,0.);
}
for(it=0;it<nt;it++) {
for(ig=0;ig<ng;ig++) {
#ifdef SF_HAS_COMPLEX_H
wfl_s[ig] += dat_s[it][ig];
dat_r[it][ig] = wfl_s[ig]*img[it][ig];
#else
wfl_s[ig] = sf_cadd(wfl_s[ig],dat_s[it][ig]);
dat_r[it][ig] = sf_crmul(wfl_s[ig],img[it][ig]);
#endif
}
if(method!=0) rweone_fk(ws,wfl_s,aa[it],a0[it],b0[it],mm[it],it);
else rweone_fx(ws,wfl_s,aa[it],it);
rweone_tap(wfl_s);
}
for(it=0;it<nt;it++) {
for(ig=0;ig<ng;ig++) {
dat_s[it][ig] = dat_r[it][ig];
}
}
wr = -w; /* causal */
for(ig=0;ig<ng;ig++) {
wfl_r[ig] = sf_cmplx(0.,0.);
}
for(it=nt-1;it>=0;it--) {
for(ig=0;ig<ng;ig++) {
#ifdef SF_HAS_COMPLEX_H
wfl_r[ig] += dat_s[it][ig];
#else
wfl_r[ig] = sf_cadd(wfl_r[ig],dat_s[it][ig]);
#endif
dat_r[it][ig] = wfl_r[ig];
}
if(method!=0) rweone_fk(wr,wfl_r,aa[it],a0[it],b0[it],mm[it],it);
else rweone_fx(wr,wfl_r,aa[it],it);
rweone_tap(wfl_r);
}
sf_complexwrite(dat_r[0],ng*nt,Fw_r);
} else {
ws = -w; /* causal */
wr = +w; /* anti-causal */
sf_complexread(dat_s[0],ng*nt,Fw_s);
sf_complexread(dat_r[0],ng*nt,Fw_r);
for(ig=0;ig<ng;ig++) {
wfl_s[ig] = sf_cmplx(0,0);
wfl_r[ig] = sf_cmplx(0,0);
}
for(it=0;it<=nt-2;it++) {
for(ig=0;ig<ng;ig++) {
#ifdef SF_HAS_COMPLEX_H
wfl_s[ig] += dat_s[it][ig];
wfl_r[ig] += dat_r[it][ig];
#else
wfl_s[ig] = sf_cadd(wfl_s[ig],dat_s[it][ig]);
wfl_r[ig] = sf_cadd(wfl_r[ig],dat_r[it][ig]);
#endif
}
rweone_spi(wfl_s,wfl_r,img[it]);
if(method!=0) {
rweone_fk(ws,wfl_s,aa[it],a0[it],b0[it],mm[it],it);
rweone_fk(wr,wfl_r,aa[it],a0[it],b0[it],mm[it],it);
} else {
rweone_fx(ws,wfl_s,aa[it],it);
rweone_fx(wr,wfl_r,aa[it],it);
}
}
it=nt-1; rweone_spi(wfl_s,wfl_r,img[it]);
}
}
if(!adj) sf_floatwrite (img[0],ng*nt,Fi);
/*------------------------------------------------------------*/
exit(0);
}
int main(int argc, char* argv[])
{
bool verb,fsrf,snap,expl,dabc;
int jsnap,ntsnap,jdata;
/* OMP parameters */
#ifdef _OPENMP
int ompnth;
#endif
/* I/O files */
sf_file Fwav=NULL; /* wavelet */
sf_file Fsou=NULL; /* sources */
sf_file Frec=NULL; /* receivers */
sf_file Fmag=NULL; /* magnetic permitivity */
sf_file Fele=NULL; /* electric susceptibility */
sf_file Fcdt=NULL; /* conductivity */
sf_file Fdat=NULL; /* data */
sf_file Fwfl=NULL; /* wavefield */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* cube axes */
sf_axis at,az,ax;
sf_axis as,ar;
int nt,nz,nx,ns,nr,nb;
int it,iz,ix;
float dt,dz,dx,idz,idx;
/* FDM structure */
fdm2d fdm=NULL;
abcone2d abc=NULL;
sponge spo=NULL;
/* I/O arrays */
float *ww=NULL; /* wavelet */
pt2d *ss=NULL; /* sources */
pt2d *rr=NULL; /* receivers */
float *dd=NULL; /* data */
float **tt=NULL;
float **vel=NULL; /* velocity */
float **mag=NULL;
float **ele=NULL;
float **cdt=NULL;
float **cdtele=NULL; /* temporary cdt*dt/2*ele */
float **magele=NULL; /* temporary dt*dt/mag*ele */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
float **um,**uo,**up,**ua,**ut; /* wavefield: um = U @ t-1; uo = U @ t; up = U @ t+1 */
/* linear interpolation weights/indices */
lint2d cs,cr;
/* FD operator size */
float co,cax,cbx,caz,cbz;
/* wavefield cut params */
sf_axis acz=NULL,acx=NULL;
int nqz,nqx;
float oqz,oqx;
float dqz,dqx;
float **uc=NULL;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
/*------------------------------------------------------------*/
/* OMP parameters */
#ifdef _OPENMP
ompnth=omp_init();
#endif
/*------------------------------------------------------------*/
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getbool("snap",&snap)) snap=false; /* wavefield snapshots flag */
if(! sf_getbool("free",&fsrf)) fsrf=false; /* free surface flag */
if(! sf_getbool("expl",&expl)) expl=false; /* "exploding reflector" */
if(! sf_getbool("dabc",&dabc)) dabc=false; /* absorbing BC */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* I/O files */
Fwav = sf_input ("in" ); /* wavelet */
Fsou = sf_input ("sou"); /* sources */
Frec = sf_input ("rec"); /* receivers */
Fwfl = sf_output("wfl"); /* wavefield */
Fdat = sf_output("out"); /* data */
/*------------------------------------------------------------*/
Fmag = sf_input ("mag"); /* magnetic permitivity */
Fele = sf_input ("ele"); /* electric susceptibility */
Fcdt = sf_input ("cdt"); /* conductivity */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* axes */
at = sf_iaxa(Fwav,2); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
az = sf_iaxa(Fmag,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax = sf_iaxa(Fmag,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* space */
as = sf_iaxa(Fsou,2); sf_setlabel(as,"s"); if(verb) sf_raxa(as); /* sources */
ar = sf_iaxa(Frec,2); sf_setlabel(ar,"r"); if(verb) sf_raxa(ar); /* receivers */
nt = sf_n(at); dt = sf_d(at);
nz = sf_n(az); dz = sf_d(az);
nx = sf_n(ax); dx = sf_d(ax);
ns = sf_n(as);
nr = sf_n(ar);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* other execution parameters */
if(! sf_getint("jdata",&jdata)) jdata=1;
if(snap) { /* save wavefield every *jsnap* time steps */
if(! sf_getint("jsnap",&jsnap)) jsnap=nt;
}
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* expand domain for FD operators and ABC
we exclude some of the code to maintain the same size of velocity model*/
if( !sf_getint("nb",&nb) || nb<NOP) nb=NOP;
fdm=fdutil_init(verb,fsrf,az,ax,nb,1);
/*sf_setn(az,fdm->nzpad); sf_seto(az,fdm->ozpad); if(verb) sf_raxa(az);
sf_setn(ax,fdm->nxpad); sf_seto(ax,fdm->oxpad); if(verb) sf_raxa(ax);*/
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* setup output data header */
sf_oaxa(Fdat,ar,1);
sf_setn(at,nt/jdata);
sf_setd(at,dt*jdata);
sf_oaxa(Fdat,at,2);
/* setup output wavefield header */
if(snap) {
if(!sf_getint ("nqz",&nqz)) nqz=sf_n(az);
if(!sf_getint ("nqx",&nqx)) nqx=sf_n(ax);
if(!sf_getfloat("oqz",&oqz)) oqz=sf_o(az);
if(!sf_getfloat("oqx",&oqx)) oqx=sf_o(ax);
dqz=sf_d(az);
dqx=sf_d(ax);
acz = sf_maxa(nqz,oqz,dqz); sf_raxa(acz);
acx = sf_maxa(nqx,oqx,dqx); sf_raxa(acx);
/* check if the imaging window fits in the wavefield domain */
uc=sf_floatalloc2(sf_n(acz),sf_n(acx));
ntsnap=0;
for(it=0; it<nt; it++) {
if(it%jsnap==0) ntsnap++;
}
sf_setn(at, ntsnap);
sf_setd(at,dt*jsnap);
if(verb) sf_raxa(at);
sf_oaxa(Fwfl,acz,1);
sf_oaxa(Fwfl,acx,2);
sf_oaxa(Fwfl,at, 3);
}
if(expl) {
ww = sf_floatalloc( 1);
} else {
ww = sf_floatalloc(ns);
}
dd = sf_floatalloc(nr);
/*------------------------------------------------------------*/
/* setup source/receiver coordinates */
ss = (pt2d*) sf_alloc(ns,sizeof(*ss));
rr = (pt2d*) sf_alloc(nr,sizeof(*rr));
pt2dread1(Fsou,ss,ns,2); /* read (x,z) coordinates */
pt2dread1(Frec,rr,nr,2); /* read (x,z) coordinates */
cs = lint2d_make(ns,ss,fdm);
cr = lint2d_make(nr,rr,fdm);
/*------------------------------------------------------------*/
/* setup FD coefficients */
idz = 1/dz;
idx = 1/dx;
co = C0 * (idx*idx+idz*idz);
cax= CA * idx*idx;
cbx= CB * idx*idx;
caz= CA * idz*idz;
cbz= CB * idz*idz;
/*------------------------------------------------------------*/
tt = sf_floatalloc2(nz,nx);
vel = sf_floatalloc2(fdm->nzpad,fdm->nxpad);
mag = sf_floatalloc2(fdm->nzpad,fdm->nxpad);
ele = sf_floatalloc2(fdm->nzpad,fdm->nxpad);
cdt = sf_floatalloc2(fdm->nzpad,fdm->nxpad);
cdtele =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
magele =sf_floatalloc2(fdm->nzpad,fdm->nxpad);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* input magnetic susceptibility*/
sf_floatread(tt[0],nz*nx,Fmag ); expand(tt,mag,fdm);
/* input electric susceptibility*/
sf_floatread(tt[0],nz*nx,Fele ); expand(tt,ele,fdm);
/* input conductivity*/
sf_floatread(tt[0],nz*nx,Fcdt ); expand(tt,cdt,fdm);
/*------------------------------------------------------------*/
/* cdtele = sigma*dt/2*epsilon */
/* magele = dt*dt/mu*epsilon */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
cdtele[ix][iz] = cdt[ix][iz]*dt/(2*(ele[ix][iz]));
magele[ix][iz] = dt*dt/(mag[ix][iz]*ele[ix][iz]);
vel[ix][iz] = 1./(sqrt(mag[ix][iz]*ele[ix][iz]));
}
}
if(fsrf) { /* free surface */
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nb; iz++) {
cdtele[ix][iz]=0;
magele[ix][iz]=0;
}
}
}
/*------------------------------------------------------------*/
free(*tt); free(tt);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* allocate wavefield arrays */
um=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
uo=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
up=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
ua=sf_floatalloc2(fdm->nzpad,fdm->nxpad);
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
um[ix][iz]=0;
uo[ix][iz]=0;
up[ix][iz]=0;
ua[ix][iz]=0;
}
}
/*------------------------------------------------------------*/
if(dabc) {
/* one-way abc setup */
abc = abcone2d_make(NOP,dt,vel,fsrf,fdm);
/* sponge abc setup */
spo = sponge_make(fdm->nb);
}
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
/*------------------------------------------------------------*/
if(verb) fprintf(stderr,"\n");
for (it=0; it<nt; it++) {
if(verb) fprintf(stderr,"\b\b\b\b\b%d",it);
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz) \
shared(fdm,ua,uo,co,cax,caz,cbx,cbz,idx,idz)
#endif
for (ix=NOP; ix<fdm->nxpad-NOP; ix++) {
for(iz=NOP; iz<fdm->nzpad-NOP; iz++) {
/* 4th order Laplacian operator */
ua[ix][iz] =
co * uo[ix ][iz ] +
cax*(uo[ix-1][iz ] + uo[ix+1][iz ]) +
cbx*(uo[ix-2][iz ] + uo[ix+2][iz ]) +
caz*(uo[ix ][iz-1] + uo[ix ][iz+1]) +
cbz*(uo[ix ][iz-2] + uo[ix ][iz+2]);
}
}
/* inject acceleration source */
if(expl) {
sf_floatread(ww, 1,Fwav);
lint2d_inject1(ua,ww[0],cs);
} else {
sf_floatread(ww,ns,Fwav);
lint2d_inject(ua,ww,cs);
}
/* step forward in time */
#ifdef _OPENMP
#pragma omp parallel for \
schedule(dynamic,fdm->ompchunk) \
private(ix,iz) \
shared(fdm,ua,uo,um,up,cdtele,magele)
#endif
for (ix=0; ix<fdm->nxpad; ix++) {
for(iz=0; iz<fdm->nzpad; iz++) {
up[ix][iz] = (2*uo[ix][iz]
- (1-cdtele[ix][iz])*um[ix][iz]
+ ua[ix][iz]*(magele[ix][iz]))/(1+cdtele[ix][iz]);
}
}
/* circulate wavefield arrays */
ut=um;
um=uo;
uo=up;
up=ut;
if(dabc) {
/* one-way abc apply */
abcone2d_apply(uo,um,NOP,abc,fdm);
sponge2d_apply(um,spo,fdm);
sponge2d_apply(uo,spo,fdm);
sponge2d_apply(up,spo,fdm);
}
/* extract data */
lint2d_extract(uo,dd,cr);
if(snap && it%jsnap==0) {
cut2d(uo,uc,fdm,acz,acx);
sf_floatwrite(uc[0],sf_n(acz)*sf_n(acx),Fwfl);
}
if( it%jdata==0)
sf_floatwrite(dd,nr,Fdat);
}
if(verb) fprintf(stderr,"\n");
/*------------------------------------------------------------*/
/* deallocate arrays */
free(*um); free(um);
free(*up); free(up);
free(*uo); free(uo);
free(*ua); free(ua);
free(*uc); free(uc);
free(*mag); free(mag);
free(*ele); free(ele);
free(*cdt); free(cdt);
free(*vel); free(vel);
free(*cdtele); free(cdtele);
free(*magele); free(magele);
/*------------------------------------------------------------*/
free(ww);
free(ss);
free(rr);
free(dd);
/*------------------------------------------------------------*/
sf_close();
exit (0);
}
int main(int argc, char* argv[])
{
int ompnth=1;
sf_file in, out; /* Input and output files */
sf_axis az,ax,a3;
int nz,nx,n3;
int box1,box2,klo1,khi1,klo2,khi2,kmid2,kmid1;
int ix,iz,i3;
float *sumG,***d,***dat,***neg,***dN;
float neg1,AmpNorm,h,h1;
double scalea, logs;
/*---------------------------------------------------------*/
/* Initialize RSF */
sf_init(argc,argv);
/* standard input */
in = sf_input("in");
/* standard output */
out = sf_output("out");
#ifdef _OPENMP
ompnth = omp_init();
#endif
/* parameters from input file*/
az=sf_iaxa(in,1); sf_setlabel(az,"z"); nz = sf_n(az);
ax=sf_iaxa(in,2); sf_setlabel(ax,"x"); nx = sf_n(ax);
a3=sf_iaxa(in,3); sf_setlabel(a3,"y"); n3 = sf_n(a3);
/* parameter from the command line (i.e. box1=50 box2=50 ) */
if (!sf_getint("box1",&box1)) sf_error("Need box1=");
if (!sf_getint("box2",&box2)) sf_error("Need box2=");
/* allocate floating point array */
dat = sf_floatalloc3 (nz,nx,n3);
/* initialise the size of the searching box*/
int s1= nz-(box1);
int s2= nx-(box2);
int bm1=box1/2;
int bm2=box2/2;
/*initialise the mid-point of each box) */
sumG =sf_floatalloc (n3);
d =sf_floatalloc3 (nz,nx,n3);
dN =sf_floatalloc3 (nz,nx,n3);
neg =sf_floatalloc3 (nz,nx,n3);
sf_floatread(dat[0][0],nz*nx*n3,in);
// Global Sum
for (i3=0 ; i3<n3; ++i3){
sumG[i3]=0;
for (ix=0; ix<nx; ++ix){
for (iz=0; iz<nz; ++iz){
d[i3][ix][iz] = dat[i3][ix][iz] * dat[i3][ix][iz]; //make all amplitudes positive
sumG[i3] += d[i3][ix][iz];
}
}
}
/*
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic) \
private(klo2,klo1,kmid2,kmid1,khi1,khi2,neg1,AmpNorm,scalea,logs,h1,h)
#endif
*/
//initialise the box for negentropy
for (i3=0 ; i3<n3 ; ++i3 ){
klo2=0;klo1=0;
for (klo2=0; klo2<(s2); ++klo2){
for (klo1=0; klo1<(s1); ++klo1){
//intialise parameters
neg1=0.0;scalea=0.0;logs=0.0;
AmpNorm=0.0;h=0,h1=0;
//Set upper limit of searching box and midpoints
khi2=klo2+box2; khi1=klo1+box1;
kmid2=klo2+bm2; kmid1=klo1+bm1;
//Sum values in each box
for (ix=klo2; ix<khi2; ++ix){
for (iz=klo1; iz<khi1; ++iz){
AmpNorm =(d[i3][ix][iz])/(sumG[i3]);
dN[i3][ix][iz]=AmpNorm; //ai
//Gaussian operator
h =(((iz -kmid1) * (iz -kmid1)) + \
((ix -kmid2) * (ix -kmid2))) / (2*box1*box2*1.41);
h1=(((box1*0.5 ) * (box1*0.5 )) + \
((box2*0.5 ) * (box2*0.5 )))/ (2*box1*box2*1.41);
h =exp(-4*h );
h1=exp(-4*h1);
if (h1>= h) scalea=0;
else
scalea = box1 * box2 * AmpNorm * (h-h1); //qi
if (AmpNorm==0) logs= 0;
else logs= scalea*scalea;
/* logs can be different functions:
else {logs=log(scalea);}
logs=log(scalea); */
neg1 += (scalea*logs);
}
}
neg[i3][kmid2][kmid1] = neg1/(box1*box2);
}
}
}
sf_floatwrite(neg[0][0] ,nz*nx*n3 ,out); //write negentropy
exit(0);
}
int main (int argc, char* argv[])
{
bool verb, fsrf, snap, expl, dabc;
int jsnap, ntsnap, jdata;
/* I/O files */
sf_file Fwav = NULL; /* wavelet */
sf_file Fsou = NULL; /* sources */
sf_file Frec = NULL; /* receivers */
sf_file Fvel = NULL; /* velocity */
sf_file Fden = NULL; /* density */
sf_file Fdat = NULL; /* data */
sf_file Fwfl = NULL; /* wavefield */
/* cube axes */
sf_axis at, az, ax;
sf_axis as, ar;
int cpuid;
int nt, nz, nx, ns, nr;
int it, ia;
float dt, dz, dx;
/* FDM structure */
/* Wee keep these structures for compatibility,
as soon as PETSC version is finished,
this will be removed */
fdm2d fdm = NULL;
/* I/O arrays */
float *ww = NULL; /* wavelet */
pt2d *ss = NULL; /* sources */
pt2d *rr = NULL; /* receivers */
float *dd = NULL; /* data */
float **u,**v;
/* linear interpolation weights/indices */
lint2d cs,cr;
/* wavefield cut params */
sf_axis acz = NULL, acx = NULL;
int nqz, nqx;
float oqz, oqx;
float dqz, dqx;
float **uc = NULL;
sf_petsc_aimplfd2 aimplfd;
PetscErrorCode ierr;
/* PETSc Initialization */
ierr = PetscInitialize (&argc, &argv, 0, 0); CHKERRQ(ierr);
MPI_Comm_rank (MPI_COMM_WORLD, &cpuid);
/*------------------------------------------------------------*/
/* init RSF */
sf_init (argc, argv);
/*------------------------------------------------------------*/
if (!sf_getbool ("verb", &verb)) verb = false; /* verbosity flag */
if (!sf_getbool ("snap", &snap)) snap = false; /* wavefield snapshots flag */
if (!sf_getbool ("free", &fsrf)) fsrf = false; /* free surface flag */
if (!sf_getbool ("expl", &expl)) expl = false; /* "exploding reflector" */
if (!sf_getbool ("dabc", &dabc)) dabc = false; /* absorbing BC */
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* I/O files */
Fwav = sf_input ("in" ); /* wavelet */
Fvel = sf_input ("vel"); /* velocity */
Fsou = sf_input ("sou"); /* sources */
Frec = sf_input ("rec"); /* receivers */
Fwfl = sf_output("wfl"); /* wavefield */
Fdat = sf_output("out"); /* data */
Fden = sf_input ("den"); /* density */
/*------------------------------------------------------------*/
/* axes */
at = sf_iaxa (Fwav,2); sf_setlabel (at,"t"); if (verb && 0 == cpuid) sf_raxa (at); /* time */
az = sf_iaxa (Fvel,1); sf_setlabel (az,"z"); if (verb && 0 == cpuid) sf_raxa (az); /* depth */
ax = sf_iaxa (Fvel,2); sf_setlabel (ax,"x"); if (verb && 0 == cpuid) sf_raxa (ax); /* space */
as = sf_iaxa (Fsou, 2); sf_setlabel (as, "s"); if (verb && 0 == cpuid) sf_raxa (as); /* sources */
ar = sf_iaxa (Frec, 2); sf_setlabel (ar, "r"); if (verb && 0 == cpuid) sf_raxa (ar); /* receivers */
nt = sf_n (at); dt = sf_d (at);
nz = sf_n (az); dz = sf_d (az);
nx = sf_n (ax); dx = sf_d (ax);
ns = sf_n (as);
nr = sf_n (ar);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* other execution parameters */
if (!sf_getint ("jdata", &jdata)) jdata = 1;
if (snap) { /* save wavefield every *jsnap* time steps */
if (!sf_getint ("jsnap", &jsnap)) jsnap = nt;
}
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* expand domain for FD operators and ABC */
/*if (!sf_getint("nb",&nb) || nb<NOP) nb=NOP;*/
fdm = fdutil_init (verb, true, az, ax, 0, 1);
/*------------------------------------------------------------*/
if (0 == cpuid) {
sf_setn (az, fdm->nzpad); sf_seto (az, fdm->ozpad); if(verb) sf_raxa (az);
sf_setn (ax, fdm->nxpad); sf_seto (ax, fdm->oxpad); if(verb) sf_raxa (ax);
/*------------------------------------------------------------*/
/*------------------------------------------------------------*/
/* setup output data header */
sf_oaxa (Fdat, ar, 1);
sf_setn (at, nt/jdata);
sf_setd (at, dt*jdata);
sf_oaxa (Fdat, at, 2);
}
/* setup output wavefield header */
if (snap && 0 == cpuid) {
if (!sf_getint ("nqz", &nqz)) nqz = sf_n (az);
if (!sf_getint ("nqx", &nqx)) nqx = sf_n (ax);
if (!sf_getfloat ("oqz", &oqz)) oqz = sf_o (az);
if (!sf_getfloat ("oqx", &oqx)) oqx = sf_o (ax);
dqz = sf_d (az);
dqx = sf_d (ax);
acz = sf_maxa (nqz, oqz, dqz); sf_raxa (acz);
acx = sf_maxa (nqx, oqx, dqx); sf_raxa (acx);
/* check if the imaging window fits in the wavefield domain */
uc = sf_floatalloc2 (sf_n (acz), sf_n (acx));
ntsnap = 0;
for (it = 0; it < nt; it++) {
if (it % jsnap == 0)
ntsnap++;
}
sf_setn (at, ntsnap);
sf_setd (at, dt*jsnap);
if (verb)
sf_raxa(at);
sf_oaxa (Fwfl, acz, 1);
sf_oaxa (Fwfl, acx, 2);
sf_oaxa (Fwfl, at, 3);
}
if (expl) {
ww = sf_floatalloc (1);
} else {
ww = sf_floatalloc (ns);
}
dd = sf_floatalloc (nr);
/*------------------------------------------------------------*/
/* setup source/receiver coordinates */
ss = (pt2d*) sf_alloc (ns, sizeof (*ss));
rr = (pt2d*) sf_alloc (nr, sizeof (*rr));
pt2dread1 (Fsou, ss, ns, 2); /* read (x,z) coordinates */
pt2dread1 (Frec, rr, nr, 2); /* read (x,z) coordinates */
cs = lint2d_make (ns, ss, fdm);
cr = lint2d_make (nr, rr, fdm);
v = sf_floatalloc2 (nz, nx);
u = sf_floatalloc2 (nz, nx);
/* input velocity */
sf_floatread (v[0], nz*nx, Fvel);
/*------------------------------------------------------------*/
PetscFPrintf (MPI_COMM_WORLD, stderr, "Initializing GMRES solver\n");
aimplfd = sf_petsc_aimplfd2_init (nz, nx, dz, dx, dt, &v[0][0], 100, true);
/*------------------------------------------------------------*/
/*
* MAIN LOOP
*/
/*------------------------------------------------------------*/
for (it = 0; it < nt; it++) {
PetscFPrintf (MPI_COMM_WORLD, stderr, "Timestep #%d, t=%f\n", it, it*dt);
sf_petsc_aimplfd2_next_step (aimplfd);
/* inject acceleration source */
if (expl) {
sf_floatread (ww, 1, Fwav);
for (ia = 0; ia < cs->n; ia++) {
sf_petsc_aimplfd2_add_source_ut1 (aimplfd, ww[0], cs->jz[ia], cs->jx[ia]);
}
} else {
sf_floatread (ww, ns, Fwav);
for (ia = 0; ia < cs->n; ia++) {
/*
PetscFPrintf (MPI_COMM_WORLD, stderr, "Source #%d [%d, %d], f=%f\n", ia, cs->jz[ia], cs->jx[ia], ww[0]);
*/
sf_petsc_aimplfd2_add_source_ut1 (aimplfd, ww[ia], cs->jz[ia], cs->jx[ia]);
}
}
sf_petsc_aimplfd2_get_wavefield_ut2 (aimplfd, &u[0][0]);
/* extract data */
/*
lint2d_extract (u, dd, cr);
*/
for (ia = 0; ia < cr->n; ia++) {
dd[ia] = u[cr->jx[ia]][cr->jz[ia]];
}
if (snap && it % jsnap == 0 && 0 == cpuid) {
cut2d (u, uc, fdm, acz, acx);
sf_floatwrite (uc[0], sf_n(acz)*sf_n(acx), Fwfl);
}
if (it % jdata == 0 && 0 == cpuid)
sf_floatwrite (dd, nr, Fdat);
}
exit (0);
}
int main(int argc, char* argv[])
{
bool verb; /* verbosity flag */
float clip; /* threshold (clip value) */
sf_file Fc; /* cube file */
sf_file Fl; /* list file */
extern int fseeko(FILE *stream, off_t offset, int whence);
sf_axis ax,ay,az;
sf_axis aa;
int ix,iy,iz;
int nx,ny,nz,nj,na;
int nk=0,jk;
float **cube;
float dx,dy,dz;
float x0,y0,z0;
FILE* tfile;
char* tname;
float t2[3],t3[4];
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
if(! sf_getbool("verb",&verb)) verb=false;
if(! sf_getfloat("clip",&clip)) clip=0;
Fc = sf_input ( "in"); /* input cube */
Fl = sf_output("out"); /* output list */
/* read axes*/
az=sf_iaxa(Fc,1);
sf_setlabel(az,"z");
ax=sf_iaxa(Fc,2);
sf_setlabel(ax,"x");
ay=sf_iaxa(Fc,3);
sf_setlabel(ay,"y");
nz=sf_n(az);
z0=sf_o(az);
dz=sf_d(az);
nx=sf_n(ax);
x0=sf_o(ax);
dx=sf_d(ax);
ny=sf_n(ay);
y0=sf_o(ay);
dy=sf_d(ay);
na=0;
if(ny>1) {
if(verb) sf_warning("initiating 3D points");
nj=4;
} else {
if(verb) sf_warning("initiating 2D points");
nj=3;
}
/*------------------------------------------------------------*/
cube = sf_floatalloc2(nz,nx);
tfile = sf_tempfile(&(tname), "w+b");
for (iy=0; iy<ny; iy++) {
/* if(verb) sf_warning("iy=%d",iy);*/
sf_floatread(cube[0],nz*nx,Fc);
nk=0;
for (ix=0; ix<nx; ix++) {
for (iz=0; iz<nz; iz++) {
if( fabs(cube[ix][iz]) > clip) {
nk++;
}
}
}
if(ny>1) {
jk=0;
for (ix=0; ix<nx; ix++) {
for (iz=0; iz<nz; iz++) {
if( fabs(cube[ix][iz]) > clip) {
t3[0] = x0 + ix * dx;
t3[1] = y0 + iy * dy;
t3[2] = z0 + iz * dz;
t3[3] = cube[ix][iz];
fseeko(tfile,jk*4*sizeof(float),SEEK_SET);
fwrite( t3, sizeof(float),4,tfile);
jk++;
}
}
}
} else {
jk=0;
for (ix=0; ix<nx; ix++) {
for (iz=0; iz<nz; iz++) {
if( fabs(cube[ix][iz]) > clip) {
t2[0] = x0 + ix * dx;
t2[1] = z0 + iz * dz;
t2[2] = cube[ix][iz];
fseeko(tfile,jk*3*sizeof(float),SEEK_SET);
fwrite( t2, sizeof(float),3,tfile);
jk++;
}
}
}
} /* else ny=1 */
na += nk;
} /* iy */
/* output axes */
aa = sf_maxa(nj,0,1);
sf_oaxa(Fl,aa,1);
if(verb) sf_raxa(aa);
free(aa);
aa = sf_maxa(na,0,1);
sf_oaxa(Fl,aa,2);
if(verb) sf_raxa(aa);
free(aa);
if( ny>1) {
for( jk=0; jk<nk; jk++) {
fseeko(tfile,jk*4*sizeof(float),SEEK_SET);
fread( t3, sizeof(float),4,tfile);
/* if(verb) sf_warning("%d, %g %g %g %g",jk,t3[0],t3[1],t3[2],t3[3]);*/
sf_floatwrite(t3,4,Fl);
}
} else {
for( jk=0; jk<nk; jk++) {
fseeko(tfile,jk*3*sizeof(float),SEEK_SET);
fread( t2, sizeof(float),3,tfile);
/* if(verb) sf_warning("%d, %g %g %g",jk,t2[0],t2[1],t2[2]);*/
sf_floatwrite(t2,3,Fl);
}
}
free(cube);
unlink(tname);
exit (0);
}
int main (int argc, char *argv[])
{
bool verb;
bool rays;
sf_axis az,ax; /* Cartesian coordinates */
sf_axis at,ag; /* Ray coordinates */
int it,ig;
int nz,nx,nt,ng;
float dt,dg,ot,og;
float xsou,zsou; /* source coordinates */
sf_file Fv=NULL; /* velocity file */
sf_file Fw=NULL; /* wavefronfs file */
float **vv=NULL; /* velocity */
pt2d *wm=NULL; /* wavefront it-1 */
pt2d *wo=NULL; /* wavefront it */
pt2d *wp=NULL; /* wavefront it+1 */
pt2d Ro; /* point on wft it-1 */
pt2d Pm,Po,Pp; /* points on wft it */
pt2d Qo; /* point on wft it+1 */
/*------------------------------------------------------------*/
sf_init(argc,argv);
if(! sf_getbool("verb",&verb)) verb=false;
if(! sf_getbool("rays",&rays)) rays=false;
/* velocity file */
Fv = sf_input ("in");
az = sf_iaxa(Fv,1); sf_setlabel(az,"z"); nz=sf_n(az); if(verb) sf_raxa(az);
ax = sf_iaxa(Fv,2); sf_setlabel(ax,"x"); nx=sf_n(ax); if(verb) sf_raxa(ax);
vv=sf_floatalloc2(nz,nx);
sf_floatread(vv[0],nz*nx,Fv);
/* source location */
if(! sf_getfloat("xsou",&xsou)) xsou=sf_o(ax) + nx*sf_d(ax)/2;
if(! sf_getfloat("zsou",&zsou)) zsou=sf_o(az) + nz*sf_d(az)/2;
if(verb) fprintf(stderr,"xsou=%f zsou=%f\n",xsou,zsou);
/* time axis */
if(! sf_getint ("nt",&nt)) nt=100;
if(! sf_getfloat("ot",&ot)) ot=0;
if(! sf_getfloat("dt",&dt)) dt=0.001;
at = sf_maxa(nt,ot,dt); sf_setlabel(at,"t");
/* shooting angle axis */
if(! sf_getint ("ng",&ng)) ng= 360;
if(! sf_getfloat("og",&og)) og=-180;
if(! sf_getfloat("dg",&dg)) dg= 1;
ag = sf_maxa(ng,og,dg); sf_setlabel(ag,"g");
/*------------------------------------------------------------*/
/* wavefronts file (g,t) */
Fw = sf_output("out");
sf_oaxa(Fw,ag,1); if(verb) sf_raxa(ag);
sf_oaxa(Fw,at,2); if(verb) sf_raxa(at);
/* set the output to complex */
sf_putint(Fw,"esize",8);
sf_settype(Fw,SF_COMPLEX);
/*------------------------------------------------------------*/
/* allocate wavefronts */
wm = pt2dalloc1(ng);
wo = pt2dalloc1(ng);
wp = pt2dalloc1(ng);
/* initialize wavefronts */
for( ig=0; ig<ng; ig++) {
wm[ig].x=wo[ig].x=wp[ig].x=0;
wm[ig].z=wo[ig].z=wp[ig].z=0;
wm[ig].v=wo[ig].v=wp[ig].v=0;
}
/*------------------------------------------------------------*/
/* init HWT */
hwt2d_init(vv,az,ax,at,ag);
/*------------------------------------------------------------*/
/* construct it=0 wavefront */
it=0;
for( ig=0; ig<ng; ig++) {
wm[ig].x=xsou;
wm[ig].z=zsou;
wm[ig].v=hwt2d_getv(wm[ig]);
}
pt2dwrite1(Fw,wm,ng,2); /* write wavefront it=0 */
/*------------------------------------------------------------*/
/* construct it=1 wavefront */
it=1;
for( ig=0; ig<ng; ig++) {
double d,g;
d = dt * hwt2d_getv(wm[ig]);
g = (og+ig*dg) * SF_PI/180;
wo[ig].x=xsou + d*sin(g);
wo[ig].z=zsou + d*cos(g);
wo[ig].v=hwt2d_getv(wo[ig]);
}
pt2dwrite1(Fw,wo,ng,2); /* write wavefront it=1 */
/*------------------------------------------------------------*/
/* LOOP over time */
for (it=2; it<nt; it++) {
if(verb) fprintf(stderr,"it=%d\n",it);
if(ng>3 && !rays) {
/* boundaries */
ig=0; wp[ig] = hwt2d_raytr(wm[ig],wo[ig]);
ig=ng-1; wp[ig] = hwt2d_raytr(wm[ig],wo[ig]);
for (ig=1; ig<ng-1; ig++) {
Pm = wo[ig-1];
Po = wo[ig ]; Qo = wm[ig];
Pp = wo[ig+1];
if(hwt2d_cusp(Qo,Pm,Po,Pp)) {
Ro = hwt2d_raytr(Qo, Po );
} else {
Ro = hwt2d_wfttr(Qo,Pm,Po,Pp);
}
wp[ig] = Ro;
}
} else {
for (ig=0; ig<ng; ig++) {
Po = wo[ig];
Qo = wm[ig];
Ro = hwt2d_raytr(Qo,Po);
wp[ig] = Ro;
}
}
/* write wavefront it */
pt2dwrite1(Fw,wp,ng,2);
/* step in time */
for( ig=0; ig<ng; ig++) {
wm[ig] = wo[ig];
wo[ig] = wp[ig];
}
} /* end it */
/*------------------------------------------------------------*/
exit (0);
}
int
main(int argc, char** argv)
{
bool verb, fsrf, snap, expl, dabc, cden, adj;
bool optfd, hybrid, sinc;
int jsnap, jdata;
/* I/O files */
sf_file file_wav=NULL; /* wavelet */
sf_file file_vel=NULL; /* velocity */
sf_file file_den=NULL; /* density */
sf_file file_wfl=NULL; /* wavefield */
sf_file file_dat=NULL; /* data */
sf_file file_src=NULL; /* sources */
sf_file file_rec=NULL; /* receivers */
/* cube axes */
sf_axis at = NULL, az = NULL, ax = NULL, ay = NULL;
sf_axis as = NULL, ar = NULL;
int nbd; /* ABC boundary size */
int fdorder; /* finite difference spatial accuracy order */
int nzpad,nxpad,nypad; /* boundary padded model size */
int ix,iy,it,is,nx,ny,nz,nt,ns,nr;
float dx,dy,dz,dt,dt2;
float* damp=NULL; /* damping profile for hybrid bc */
float* ws; /* wavelet */
float*** vel=NULL; /* velocity */
float*** rho=NULL; /* density */
float*** u0=NULL; /* wavefield array u@t-1 (u@t+1) */
float*** u1=NULL; /* wavefield array u@t */
float* u_dat=NULL; /* output data */
float*** ptr_tmp=NULL;
pt3d* src3d=NULL; /* source position */
pt3d* rec3d=NULL; /*receiver position*/
scoef3d cssinc = NULL, crsinc = NULL;
lint3d cslint = NULL, crlint = NULL;
/* FDM structure */
fdm3d fdm = NULL;
abcone3d abc = NULL;
sponge spo = NULL;
int nbell;
float* fdcoef_d2;
float* fdcoef_d1;
sf_axis acz = NULL, acx = NULL, acy = NULL;
int nqz, nqx, nqy;
float oqz, oqx, oqy, dqz, dqx, dqy;
float** oslice = NULL; /* output 3D wavefield slice-by-slice */
float*** tmp_array;
double wall_clock_time_s, wall_clock_time_e;
const int SECOND_DERIV = 2;
const int FIRST_DERIV = 1;
int nop;
#if defined _OPENMP && _DEBUG
double tic;
double toc;
#endif
/* init RSF */
sf_init(argc,argv);
#ifdef _OPENMP
omp_init();
wall_clock_time_s = omp_get_wtime();
#else
wall_clock_time_s = (double) clock() / CLOCKS_PER_SEC;
#endif
if (!sf_getbool("verb",&verb)) verb=false; /* Verbosity flag */
if (!sf_getbool("snap",&snap)) snap=false; /* Wavefield snapshots flag */
if (!sf_getbool("expl",&expl)) expl=false; /* Multiple sources, one wvlt*/
if (!sf_getbool("dabc",&dabc)) dabc=false; /* Absorbing BC */
if (!sf_getbool("cden",&cden)) cden=false; /* Constant density */
if (!sf_getbool("adj",&adj)) adj=false; /* adjoint flag */
if (!sf_getbool("free",&fsrf) && !sf_getbool("fsrf",&fsrf)) fsrf=false; /* Free surface flag */
if (!sf_getint("nbell",&nbell)) nbell=5; /* gaussian for source injection */
if (!sf_getbool("optfd",&optfd)) optfd=false; /* optimized FD coefficients flag */
if (!sf_getint("fdorder",&fdorder)) fdorder=4; /* spatial FD order */
if (!sf_getbool("hybridbc",&hybrid)) hybrid=false; /* hybrid Absorbing BC */
if (!sf_getbool("sinc",&sinc)) sinc=false; /* sinc source injection */
/* Initialize variables */
file_wav = sf_input("in"); /* wavelet */
file_vel = sf_input("vel"); /* velocity */
file_src = sf_input("sou"); /* sources */
file_rec = sf_input("rec"); /* receivers */
file_dat = sf_output("out"); /* data */
if (snap) file_wfl = sf_output("wfl"); /* wavefield */
if (!cden) {
if (sf_getstring("cden")) {
file_den = sf_input ("den"); /* density */
} else {
cden = true;
if (verb) sf_warning("No density file provided, running with constant density");
}
}
at = sf_iaxa(file_wav,2); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
az = sf_iaxa(file_vel,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax = sf_iaxa(file_vel,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* space */
ay = sf_iaxa(file_vel,3); sf_setlabel(ay,"y"); if(verb) sf_raxa(ay); /* space */
as = sf_iaxa(file_src,2); sf_setlabel(as,"s"); if(verb) sf_raxa(as); /* sources */
ar = sf_iaxa(file_rec,2); sf_setlabel(ar,"r"); if(verb) sf_raxa(ar); /* receivers */
nt = sf_n(at); dt = sf_d(at);
nz = sf_n(az); dz = sf_d(az);
nx = sf_n(ax); dx = sf_d(ax);
ny = sf_n(ay); dy = sf_d(ay);
ns = sf_n(as);
nr = sf_n(ar);
/* other execution parameters */
if (snap) {
if (!sf_getint("jsnap",&jsnap)) jsnap=nt;
/* # of t steps at which to save wavefield */
}
if (!sf_getint("jdata",&jdata)) jdata=1;
/* # of t steps at which to save receiver data */
/* setup output data header */
sf_oaxa(file_dat,ar,1);
sf_setn(at,(nt-1)/jdata+1);
sf_setd(at,dt*jdata);
sf_oaxa(file_dat,at,2);
/* wavefield cut params */
/* setup output wavefield header */
if (snap) {
if (!sf_getint ("nqz",&nqz)) nqz=sf_n(az); /* Saved wfld window nz */
if (!sf_getint ("nqx",&nqx)) nqx=sf_n(ax); /* Saved wfld window nx */
if (!sf_getint ("nqy",&nqy)) nqy=sf_n(ay); /* Saved wfld window ny */
if (!sf_getfloat("oqz",&oqz)) oqz=sf_o(az); /* Saved wfld window oz */
if (!sf_getfloat("oqx",&oqx)) oqx=sf_o(ax); /* Saved wfld window ox */
if (!sf_getfloat("oqy",&oqy)) oqy=sf_o(ay); /* Saved wfld window oy */
if (!sf_getfloat("dqz",&dqz)) dqz=sf_d(az); /* Saved wfld window dz */
if (!sf_getfloat("dqx",&dqx)) dqx=sf_d(ax); /* Saved wfld window dx */
if (!sf_getfloat("dqy",&dqy)) dqy=sf_d(ay); /* Saved wfld window dy */
acz = sf_maxa(nqz,oqz,dqz); if (verb) sf_raxa(acz);
acx = sf_maxa(nqx,oqx,dqx); if (verb) sf_raxa(acx);
acy = sf_maxa(nqy,oqy,dqy); if (verb) sf_raxa(acy);
/* check if the imaging window fits in the wavefield domain */
sf_setn(at,(nt-1)/jsnap+1);
sf_setd(at,dt*jsnap);
if (verb) sf_raxa(at);
sf_oaxa(file_wfl,acz,1);
sf_oaxa(file_wfl,acx,2);
sf_oaxa(file_wfl,acy,3);
sf_oaxa(file_wfl,at,4);
}
/* 2-2N finite difference coefficient */
nop = fdorder/2; /* fd half-length stencil */
if (!sf_getint("nb",&nbd) || nbd<nop) nbd=nop;
if (dabc && hybrid && nbd<=nop) nbd = 2*nop;
/* expand domain for FD operators and ABC */
fdm = fdutil3d_init(verb,fsrf,az,ax,ay,nbd,1);
sf_setn(az,fdm->nzpad); sf_seto(az,fdm->ozpad); if (verb) sf_raxa(az);
sf_setn(ax,fdm->nxpad); sf_seto(ax,fdm->oxpad); if (verb) sf_raxa(ax);
sf_setn(ay,fdm->nypad); sf_seto(ay,fdm->oypad); if (verb) sf_raxa(ay);
/* Precompute coefficients */
dt2 = dt*dt;
nzpad = nz+2*nbd; nxpad = nx+2*nbd; nypad = ny+2*nbd;
fdcoef_d2 = compute_fdcoef(nop,dz,dx,dy,optfd,SECOND_DERIV);
fdcoef_d1 = compute_fdcoef(nop,dz,dx,dy,optfd,FIRST_DERIV);
/* Allocate memories */
if (expl) ws = sf_floatalloc(1);
else ws = sf_floatalloc(ns);
vel = sf_floatalloc3(nzpad,nxpad,nypad);
if (!cden) rho = sf_floatalloc3(nzpad,nxpad,nypad);
u_dat = sf_floatalloc(nr);
src3d = pt3dalloc1(ns);
rec3d = pt3dalloc1(nr);
if (snap) oslice = sf_floatalloc2(sf_n(acz),sf_n(acx));
/* source and receiver position */
pt3dread1(file_src,src3d,ns,3); /* read format: (x,y,z) */
if (sinc) cssinc = sinc3d_make(ns,src3d,fdm);
else cslint = lint3d_make(ns,src3d,fdm);
pt3dread1(file_rec,rec3d,nr,3); /* read format: (x,y,z) */
if (sinc) crsinc = sinc3d_make(nr,rec3d,fdm);
else crlint = lint3d_make(nr,rec3d,fdm);
if (!sinc) fdbell3d_init(nbell);
/* temperary array */
tmp_array = sf_floatalloc3(nz,nx,ny);
/* read velocity and pad */
sf_floatread(tmp_array[0][0],nz*nx*ny,file_vel);
expand3d(tmp_array,vel,fdm);
/* read density and pad */
if (!cden) {
sf_floatread(tmp_array[0][0],nz*nx*ny,file_den);
expand3d(tmp_array,rho,fdm);
}
free(**tmp_array); free(*tmp_array); free(tmp_array);
/* A1 one-way ABC implicit scheme coefficients */
if (dabc) {
abc = abcone3d_make(nbd,dt,vel,fsrf,fdm);
if (hybrid)
damp = damp_make(nbd-nop); /* compute damping profiles for hybrid bc */
else
spo = sponge_make(fdm->nb);
}
/* allocate memory for wavefield variables */
u0 = sf_floatalloc3(nzpad,nxpad,nypad);
u1 = sf_floatalloc3(nzpad,nxpad,nypad);
/* initialize variables */
memset(u0[0][0],0,sizeof(float)*nzpad*nxpad*nypad);
memset(u1[0][0],0,sizeof(float)*nzpad*nxpad*nypad);
memset(u_dat,0,sizeof(float)*nr);
/* v = (v*dt)^2 */
for (ix=0;ix<nzpad*nxpad*nypad;ix++)
*(vel[0][0]+ix) *= *(vel[0][0]+ix)*dt2;
if (fsrf && !hybrid) {
for (iy=0; iy<nypad; iy++)
for (ix=0; ix<nxpad; ix++)
memset(vel[iy][ix],0,sizeof(float)*fdm->nb);
}
for (it=0; it<nt; it++) {
if (verb) sf_warning("it=%d;",it+1);
#if defined _OPENMP && _DEBUG
tic=omp_get_wtime();
#endif
step_forward(u0,u1,vel,rho,fdcoef_d2,fdcoef_d1,nop,nzpad,nxpad,nypad);
if (adj) { /* backward inject source wavelet */
if (expl) {
sf_seek(file_wav,(off_t)(nt-it-1)*sizeof(float),SEEK_SET);
sf_floatread(ws,1,file_wav);
ws[0] *= dt2;
if (sinc) sinc3d_inject1(u0,ws[0],cssinc);
else lint3d_inject1(u0,ws[0],cslint);
} else {
sf_seek(file_wav,(off_t)(nt-it-1)*ns*sizeof(float),SEEK_SET);
sf_floatread(ws,ns,file_wav);
for (is=0; is<ns; is++) ws[is] *= dt2;
if (sinc) sinc3d_inject(u0,ws,cssinc);
else lint3d_inject(u0,ws,cslint);
}
} else { /* forward inject source wavelet */
if (expl) {
sf_floatread(ws,1,file_wav);
ws[0] *= dt2;
if (sinc) sinc3d_inject1(u0,ws[0],cssinc);
else lint3d_inject1(u0,ws[0],cslint);
} else {
sf_floatread(ws,ns,file_wav);
for (is=0; is<ns; is++) ws[is] *= dt2;
if (sinc) sinc3d_inject(u0,ws,cssinc);
else lint3d_inject(u0,ws,cslint);
}
}
/* apply abc */
if (dabc) {
if (hybrid) apply_abc(u0,u1,nz,nx,ny,nbd,abc,nop,damp);
else {
abcone3d_apply(u0,u1,nop,abc,fdm);
sponge3d_apply(u0,spo,fdm);
sponge3d_apply(u1,spo,fdm);
}
}
/* loop over pointers */
ptr_tmp = u0; u0 = u1; u1 = ptr_tmp;
/* extract snapshot */
if (snap && it%jsnap==0) {
int fy = (floor)((sf_o(acy)-fdm->oypad)/fdm->dy);
int jy = floor(sf_d(acy)/fdm->dy);
float **ptr_slice;
for (iy=0; iy<sf_n(acy); iy++) {
ptr_slice = u0[fy+iy*jy];
cut3d_slice(ptr_slice,oslice,fdm,acz,acx);
sf_floatwrite(oslice[0],sf_n(acz)*sf_n(acx),file_wfl);
}
}
/* extract receiver data */
if (sinc) sinc3d_extract(u0,u_dat,crsinc);
else lint3d_extract(u0,u_dat,crlint);
sf_floatwrite(u_dat,nr,file_dat);
#if defined _OPENMP && _DEBUG
toc=omp_get_wtime();
fprintf(stderr,"%5.2gs",(float)(toc-tic));
#endif
}
#ifdef _OPENMP
wall_clock_time_e = omp_get_wtime();
#else
wall_clock_time_e = (double) clock() / CLOCKS_PER_SEC;
#endif
if (verb)
fprintf(stderr,"\nElapsed time: %lf s\n",wall_clock_time_e-wall_clock_time_s);
free(**u0); free(*u0); free(u0);
free(**u1); free(*u1); free(u1);
free(**vel); free(*vel); free(vel);
free(u_dat);
free(ws);
free(fdcoef_d2); free(fdcoef_d1);
if (snap) { free(*oslice); free(oslice); }
if(!cden) { free(**rho); free(*rho); free(rho); }
if (hybrid) free(damp);
free(src3d); free(rec3d);
return 0;
}
int main(int argc, char* argv[])
{
bool verb;
sf_file Fi,Fs,Fr; /* I/O files */
sf_axis at,az,ax,aa; /* cube axes */
int nt,nz,nx, nhz,nhx,nht;
int it,iz,ix, ihz,ihx,iht;
int jt,jz,jx;
int kt,kz,kx;
float **ii=NULL, ***us=NULL,***ur=NULL; /* arrays */
int ompchunk;
int lox,hix;
int loz,hiz;
int lot,hit;
float ts,tr;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
if(! sf_getint("ompchunk",&ompchunk)) ompchunk=1; /* OpenMP data chunk size */
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
if(! sf_getint("nhz",&nhz)) nhz=0;
if(! sf_getint("nhx",&nhx)) nhx=0;
if(! sf_getint("nht",&nht)) nht=1;
sf_warning("nht=%d nhx=%d nhz=%d",2*nht+1,2*nhx+1,2*nhz+1);
Fs = sf_input ("in" ); /* source wavefield */
Fr = sf_input ("ur" ); /* receiver wavefield */
Fi = sf_output("out"); /* image */
/* read axes */
az=sf_iaxa(Fs,1); sf_setlabel(az,"z"); if(verb) sf_raxa(az); /* depth */
ax=sf_iaxa(Fs,2); sf_setlabel(ax,"x"); if(verb) sf_raxa(ax); /* position */
at=sf_iaxa(Fs,3); sf_setlabel(at,"t"); if(verb) sf_raxa(at); /* time */
/* set output axes */
aa=sf_maxa(1,0,1);
sf_oaxa(Fi,aa,3);
nz = sf_n(az);
nx = sf_n(ax);
nt = sf_n(at);
/* allocate work arrays */
us=sf_floatalloc3(nz,nx,nt);
ur=sf_floatalloc3(nz,nx,nt);
ii=sf_floatalloc2(nz,nx);
/* init output */
for (iz=0; iz<nz; iz++) {
for (ix=0; ix<nx; ix++) {
ii[ix][iz]=0;
}
}
sf_floatread(us[0][0],nz*nx*nt,Fs);
sf_floatread(ur[0][0],nz*nx*nt,Fr);
if(verb) fprintf(stderr," t x\n");
if(verb) fprintf(stderr,"%4d %4d\n",nt,nx);
for( it=nht; it<nt-nht; it++) { lot=-nht; hit=nht+1;
for( ix=nhx; ix<nx-nhx; ix++) { lox=-nhx; hix=nhx+1;
if(verb) fprintf(stderr,"%4d %4d",it,ix);
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) private(iz,iht,ihx,ihz,ts,tr,loz,hiz,jt,kt,jx,kx,jz,kz) shared(ur,nz,nhz,lot,hit,lox,hix)
#endif
for(iz=nhz; iz<nz-nhz; iz++) { loz=-nhz; hiz=nhz+1;
/* ts = us[it][ix][iz]*us[it][ix][iz];*/
ts = us[it][ix][iz];
tr = 0;
for( iht=lot; iht<hit; iht++) { jt=it-iht; kt=it+iht;
for( ihx=lox; ihx<hix; ihx++) { jx=ix-ihx; kx=ix+ihx;
for(ihz=loz; ihz<hiz; ihz++) { jz=iz-ihz; kz=iz+ihz;
tr += ur[jt][jx][jz]
* ur[kt][kx][kz];
} /* nhz */
} /* nhx */
} /* nht */
ii[ix][iz] += ts * tr;
} /* nz */
if(verb) fprintf(stderr,"\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
} /* nx */
} /* nt */
if(verb) fprintf(stderr,"\n");
sf_floatwrite(ii[0],nz*nx,Fi);
exit (0);
}
int main(int argc, char* argv[])
{
bool verb;
sf_file Fu,Fw; /* I/O files */
sf_axis a1,a2,a3; /* cube axes */
float ***uu=NULL, ***ww=NULL;
int *ii,ik;
int nh1,nh2,nh3;
int nb1,nb2,nb3;
int ih1,ih2,ih3;
int ib1,ib2,ib3;
int n3;
int i3;
int j1, j2, j3;
int k1, k2, k3;
int ompchunk;
int lo1,hi1;
int lo2,hi2;
int lo3,hi3;
/*------------------------------------------------------------*/
/* init RSF */
sf_init(argc,argv);
if(! sf_getint("ompchunk",&ompchunk)) ompchunk=1; /* OpenMP data chunk size */
if(! sf_getbool("verb",&verb)) verb=false; /* verbosity flag */
Fu = sf_input ("in" ); /* input field */
Fw = sf_output("out"); /* wigner distribution */
/* read axes */
a1=sf_iaxa(Fu,1); sf_setlabel(a1,"a1"); if(verb) sf_raxa(a1);
a2=sf_iaxa(Fu,2); sf_setlabel(a2,"a2"); if(verb) sf_raxa(a2);
a3=sf_iaxa(Fu,3); sf_setlabel(a3,"a3"); if(verb) sf_raxa(a3);
n3 = sf_n(a3);
if(! sf_getint("nh1",&nh1)) nh1=0;
if(! sf_getint("nh2",&nh2)) nh2=0;
if(! sf_getint("nh3",&nh3)) nh3=0;
if(n3<=1) nh3=0;
if(verb) sf_warning("nh1=%d nh2=%d nh3=%d",2*nh1+1,2*nh2+1,2*nh3+1);
nb1 = sf_n(a1);
nb2 = sf_n(a2);
nb3=2*nh3+1;
uu=sf_floatalloc3(nb1,nb2,nb3);
ww=sf_floatalloc3(nb1,nb2,nb3);
ii = sf_intalloc(nb3);
for(ib3=0;ib3<nb3;ib3++) {
ii[ib3]=ib3;
}
/*------------------------------------------------------------*/
/* low end on axis 3 */
/*------------------------------------------------------------*/
for( ib3=0; ib3<nb3; ib3++) {
for( ib2=0; ib2<nb2; ib2++) {
for( ib1=0; ib1<nb1; ib1++) {
ww[ib3][ib2][ib1] = 0.;
}
}
}
sf_floatread(uu[0][0],nb1*nb2*nb3,Fu);
for( ih3=-nh3; ih3<nh3+1; ih3++) { lo3=SF_ABS(ih3); hi3=nb3-lo3;
for( ih2=-nh2; ih2<nh2+1; ih2++) { lo2=SF_ABS(ih2); hi2=nb2-lo2;
for(ih1=-nh1; ih1<nh1+1; ih1++) { lo1=SF_ABS(ih1); hi1=nb1-lo1;
for( ib3=lo3; ib3<nh3+1;ib3++) { j3=ii[ib3-ih3]; k3=ii[ib3+ih3];
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) \
private(ib1,ib2,j2,j1,k2,k1) \
shared(ib3,j3,k3,ih2,ih1,lo2,hi2,lo1,hi1,uu,ww)
#endif
for( ib2=lo2; ib2<hi2; ib2++) { j2=ib2-ih2; k2=ib2+ih2;
for(ib1=lo1; ib1<hi1; ib1++) { j1=ib1-ih1; k1=ib1+ih1;
ww[ib3][ib2][ib1] += uu[j3][j2][j1]
* uu[k3][k2][k1];
} /* nb1 */
} /* nb2 */
} /* nb3 */
} /* nh1 */
} /* nh2 */
} /* nh3 */
for(ih3=0;ih3<nh3+1;ih3++) {
sf_floatwrite(ww[ih3][0],nb1*nb2,Fw);
}
/*------------------------------------------------------------*/
/* loop on axis 3 */
/*------------------------------------------------------------*/
if(verb) fprintf(stderr," n3\n");
if(verb) fprintf(stderr,"%5d\n",n3-1);
for(i3=nh3+1;i3<n3-nh3;i3++) {
if(verb) fprintf(stderr,"%5d",i3);
/* zero WDF */
ib3=nh3;
for( ib2=0; ib2<nb2; ib2++) {
for( ib1=0; ib1<nb1; ib1++) {
ww[ib3][ib2][ib1] = 0.;
}
}
/* circulate index to slices */
ik = ii[0];
for(ib3=0;ib3<nb3-1;ib3++) {
ii[ib3]=ii[ib3+1];
}
ii[nb3-1]=ik;
/* read new slice */
sf_floatread(uu[ ii[nb3-1] ][0],nb1*nb2,Fu);
for( ih3=-nh3; ih3<nh3+1; ih3++) {
for( ih2=-nh2; ih2<nh2+1; ih2++) { lo2=SF_ABS(ih2); hi2=nb2-lo2;
for(ih1=-nh1; ih1<nh1+1; ih1++) { lo1=SF_ABS(ih1); hi1=nb1-lo1;
ib3=nh3; j3=ii[ib3-ih3]; k3=ii[ib3+ih3];
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) \
private(ib1,ib2,j2,j1,k2,k1) \
shared(ib3,j3,k3,ih2,ih1,lo2,hi2,lo1,hi1,uu,ww)
#endif
for( ib2=lo2; ib2<hi2; ib2++) { j2=ib2-ih2; k2=ib2+ih2;
for(ib1=lo1; ib1<hi1; ib1++) { j1=ib1-ih1; k1=ib1+ih1;
ww[ib3][ib2][ib1] += uu[j3][j2][j1]
* uu[k3][k2][k1];
} /* nb1 */
} /* nb2 */
} /* nh1 */
} /* nh2 */
} /* nh3 */
sf_floatwrite(ww[nh3][0],nb1*nb2,Fw);
if(verb) fprintf(stderr,"\b\b\b\b\b");
}
/*------------------------------------------------------------*/
/* high-end on axis 3*/
/*------------------------------------------------------------*/
for( ih3=-nh3; ih3<nh3+1; ih3++) { lo3=SF_ABS(ih3); hi3=nb3-lo3;
for( ih2=-nh2; ih2<nh2+1; ih2++) { lo2=SF_ABS(ih2); hi2=nb2-lo2;
for(ih1=-nh1; ih1<nh1+1; ih1++) { lo1=SF_ABS(ih1); hi1=nb1-lo1;
for( ib3=nh3+1; ib3<hi3; ib3++) { j3=ii[ib3-ih3]; k3=ii[ib3+ih3];
#ifdef _OPENMP
#pragma omp parallel for schedule(dynamic,ompchunk) \
private(ib1,ib2,j2,j1,k2,k1) \
shared(ib3,j3,k3,ih2,ih1,lo2,hi2,lo1,hi1,uu,ww)
#endif
for( ib2=lo2; ib2<hi2; ib2++) { j2=ib2-ih2; k2=ib2+ih2;
for(ib1=lo1; ib1<hi1; ib1++) { j1=ib1-ih1; k1=ib1+ih1;
ww[ib3][ib2][ib1] += uu[j3][j2][j1]
* uu[k3][k2][k1];
} /* nb1 */
} /* nb2 */
} /* nb3 */
} /* nh1 */
} /* nh2 */
} /* nh3 */
for(ih3=nh3+1;ih3<2*nh3+1;ih3++) {
sf_floatwrite(ww[ih3][0],nb1*nb2,Fw);
}
/*------------------------------------------------------------*/
exit (0);
}
int main(int argc, char* argv[])
{
sf_file Fi=NULL, Fo=NULL, Fr=NULL; /* I/O files */
bool adj, verb, linear;
sf_axis ax,az,at,ag;
int ix,iz,it,ig;
int nx,nz,nt,ng;
float dx,dz,x0,z0;
float **mapCC=NULL, **mapRC=NULL;
float ***comCC=NULL, ***comRC=NULL;
sf_complex **rays=NULL;
int nn,ii;
bool comp; /* complex input */
/* init RSF */
sf_init(argc,argv);
Fi = sf_input ( "in");
Fr = sf_input ("rays");
Fo = sf_output( "out");
if(! sf_getbool( "verb",&verb )) verb=false;
if(! sf_getbool( "adj",&adj )) adj=false;
if(! sf_getbool("linear",&linear )) linear=true;
ag=sf_iaxa(Fr,1); ng=sf_n(ag); if(verb) sf_raxa(ag);
at=sf_iaxa(Fr,2); nt=sf_n(at); if(verb) sf_raxa(at);
if(adj) {
if(! sf_getint ("a2n",&nz)) nz=1;
if(! sf_getfloat("a2o",&z0)) z0=0.;
if(! sf_getfloat("a2d",&dz)) dz=1.;
az = sf_maxa(nz,z0,dz); sf_setlabel(az,"a2"); if(verb) sf_raxa(az);
if(! sf_getint ("a1n",&nx)) nx=1;
if(! sf_getfloat("a1o",&x0)) x0=0.;
if(! sf_getfloat("a1d",&dx)) dx=1.;
ax = sf_maxa(nx,x0,dx); sf_setlabel(ax,"a1"); if(verb) sf_raxa(ax);
sf_oaxa(Fo,ax,1);
sf_oaxa(Fo,az,2);
} else {
ax = sf_iaxa(Fi,1); nx=sf_n(ax); if(verb) sf_raxa(ax);
az = sf_iaxa(Fi,2); nz=sf_n(az); if(verb) sf_raxa(az);
sf_oaxa(Fo,ag,1);
sf_oaxa(Fo,at,2);
}
nn = sf_leftsize(Fi,2);
rays =sf_complexalloc2(ng,nt);
sf_complexread(rays[0],ng*nt,Fr);
c2r_init(ax,az,ag,at,verb);
/*------------------------------------------------------------*/
comp=false;
if(SF_COMPLEX == sf_gettype(Fi)) comp=true;
/*------------------------------------------------------------*/
mapCC=sf_floatalloc2(nx,nz);
mapRC=sf_floatalloc2(ng,nt);
if(comp) {
comCC=sf_floatalloc3(2,nx,nz);
comRC=sf_floatalloc3(2,ng,nt);
for(ii=0;ii<nn;ii++) {
sf_warning("%d of %d;",ii,nn);
if(adj) {
sf_floatread (comRC[0][0],2*ng*nt,Fi);
/* REAL */
LOOPRC( mapRC[it][ig] = comRC[it][ig][0]; );
c2r(linear,adj,mapCC,mapRC,rays);
LOOPCC( comCC[iz][ix][0] = mapCC[iz][ix]; );
/* IMAGINARY */
LOOPRC( mapRC[it][ig] = comRC[it][ig][1]; );
c2r(linear,adj,mapCC,mapRC,rays);
LOOPCC( comCC[iz][ix][1] = mapCC[iz][ix]; );
