int lrosback2(sf_complex **img, sf_complex ***wavfld, float **sill, sf_complex **rcd, bool adj,
bool verb, bool wantwf, sf_complex **lt, sf_complex **rt, int m2,
geopar geop, int pad1, sf_complex ***wavfld2)
/*< low-rank one-step backward propagation + imaging >*/
{
int it,iz,im,ik,ix,i,j; /* index variables */
int nxb,nzb,dx,dz,gpz,gpx,gpl,snpint,dt,wfit;
int nt,nz,nx, nk, nzx, nz2, nx2, nzx2;
sf_complex c;
sf_complex *cwave, *cwavem, *currm;
sf_complex **wave, *curr;
sf_complex **ccr;
nx = geop->nx;
nz = geop->nz;
nxb = geop->nxb;
nzb = geop->nzb;
dx = geop->dx;
dz = geop->dz;
gpz = geop->gpz;
gpx = geop->gpx;
gpl = geop->gpl;
snpint = geop->snpint;
nt = geop->nt;
dt = geop->dt;
ccr = sf_complexalloc2(nz, nx);
nk = cfft2_init(pad1,nzb,nxb,&nz2,&nx2);
nzx = nzb*nxb;
nzx2 = nz2*nx2;
curr = sf_complexalloc(nzx2);
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nzx2,m2);
if (!adj) {
currm = sf_complexalloc(nzx2);
icfft2_allocate(cwave);
} else {
cwavem = sf_complexalloc(nk);
icfft2_allocate(cwavem);
}
#ifdef _OPENMP
#pragma omp parallel for private(iz)
#endif
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
}
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for (ix = 0; ix < nx; ix++) {
for (iz = 0; iz < nz; iz++) {
ccr[ix][iz] = sf_cmplx(0.,0.);
}
}
if (adj) { /* migration */
/* step backward in time */
/*Main loop*/
wfit = (int)(nt-1)/snpint;
for (it = nt-1; it>=0; it--) {
if (verb) sf_warning("Backward receiver it=%d/%d;", it, nt-1);
#ifdef _OPENMP
#pragma omp parallel for private(ix,j)
#endif
for (ix=0; ix<gpl; ix++) {
j = (gpz+geop->top)+(ix+gpx+geop->lft)*nz2; /* padded grid */
curr[j]+=rcd[ix][it]; /* data injection */
}
/*matrix multiplication*/
cfft2(curr,cwave);
for (im = 0; im < m2; 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,lt,wave)
#endif
for (ix = 0; ix < nxb; ix++) {
for (iz=0; iz < nzb; iz++) {
i = iz+ix*nzb; /* original grid */
j = iz+ix*nz2; /* padded grid */
c = sf_cmplx(0.,0.); // initialize
for (im = 0; im < m2; 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 ( wantwf && it%snpint == 0 ) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,j)
#endif
for ( ix = 0; ix < nx; ix++) {
for ( iz = 0; iz<nz; iz++ ) {
j = (iz+geop->top)+(ix+geop->lft)*nz2; /* padded grid */
wavfld2[wfit][ix][iz] = curr[j];
}
}
}
/*cross-correlation imaging condition*/
if (it%snpint == 0 ) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,j)
#endif
for (ix=0; ix<nx; ix++) {
for (iz=0; iz<nz; iz++) {
j = (iz+geop->top)+(ix+geop->lft)*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
ccr[ix][iz] += conjf(wavfld[wfit][ix][iz])*curr[j];
#else
ccr[ix][iz] += sf_cmul(conjf(wavfld[wfit][ix][iz]),curr[j]);
#endif
}
}
wfit--;
}
} /*Main loop*/
if (verb) sf_warning(".");
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for (ix=0; ix<nx; ix++) {
for (iz=0; iz<nz; iz++) {
#ifdef SF_HAS_COMPLEX_H
img[ix][iz] = ccr[ix][iz]/(sill[ix][iz]+SF_EPS);
#else
img[ix][iz] = sf_crmul(ccr[ix][iz],1./(sill[ix][iz]+SF_EPS));
#endif
}
}
} else { /* modeling */
/* adjoint of source illumination */
#ifdef _OPENMP
#pragma omp parallel for private(ix, iz)
#endif
for (ix=0; ix<nx; ix++) {
for (iz=0; iz<nz; iz++) {
#ifdef SF_HAS_COMPLEX_H
ccr[ix][iz] = img[ix][iz]/(sill[ix][iz]+SF_EPS);
#else
ccr[ix][iz] = sf_crmul(img[ix][iz],1./(sill[ix][iz]+SF_EPS));
#endif
}
}
/* step forward in time */
/*Main loop*/
wfit=0;
for (it=0; it<nt; it++) {
if (verb) sf_warning("Forward receiver it=%d/%d;", it, nt-1);
if ( wantwf && it%snpint == 0 ) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,j)
#endif
for ( ix = 0; ix < nx; ix++) {
for ( iz = 0; iz<nz; iz++ ) {
j = (iz+geop->top)+(ix+geop->lft)*nz2; /* padded grid */
wavfld2[wfit][ix][iz] = curr[j];
}
}
}
/*adjoint of cross-correlation imaging condition*/
if (it%snpint == 0 ) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,j)
#endif
for (ix=0; ix<nx; ix++) {
for (iz=0; iz<nz; iz++) {
j = (iz+geop->top)+(ix+geop->lft)*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
curr[j] += (wavfld[wfit][ix][iz])*ccr[ix][iz];//adjoint of ccr[ix][iz] += conjf(wavfld[wfit][ix][iz])*curr[j]; ???
#else
curr[j] += sf_cmul((wavfld[wfit][ix][iz]),ccr[ix][iz]);
#endif
}
}
wfit++;
}
/*matrix multiplication*/
for (im = 0; im < m2; im++) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,i,j) shared(currm,lt,curr)
#endif
for (ix = 0; ix < nxb; ix++) {
for (iz=0; iz < nzb; iz++) {
i = iz+ix*nzb; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
currm[j] = conjf(lt[im][i])*curr[j];
#else
currm[j] = sf_cmul(conjf(lt[im][i]), curr[j]);
#endif
}
}
cfft2(currm,wave[im]);
}
#ifdef _OPENMP
#pragma omp parallel for private(ik,im,c) shared(wave,rt,cwave)
#endif
for (ik = 0; ik < nk; ik++) {
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += wave[im][ik]*conjf(rt[ik][im]);
#else
c += sf_cmul(wave[im][ik],conjf(rt[ik][im])); //complex multiplies complex
#endif
}
cwave[ik] = c;
}
icfft2(curr,cwave);
#ifdef _OPENMP
#pragma omp parallel for private(ix,j)
#endif
for (ix=0; ix<gpl; ix++) {
j = (gpz+geop->top)+(ix+gpx+geop->lft)*nz2; /* padded grid */
rcd[ix][it]=curr[j];
}
} /*Main loop*/
}
cfft2_finalize();
return 0;
}
int propnewc(sf_complex **ini, sf_complex **lt, sf_complex **rt, int nz, int nx, int nt, int m2, int nkzx, char *mode, int pad1, int snap, sf_complex **cc, sf_complex ***wvfld, bool verb, bool correct, sf_complex *alpha, sf_complex *beta)
/*^*/
{
/* index variables */
int it,iz,ix,im,ik,i,j,wfit;
int nz2,nx2,nk,nzx2;
sf_complex c;
/* wavefield */
sf_complex **wave,**wave2, *curr, *currm, *cwave, *cwavem, *curr1, *curr2;
nk = cfft2_init(pad1,nz,nx,&nz2,&nx2);
nzx2 = nz2*nx2;
if (nk!=nkzx) sf_error("nk discrepancy!");
curr = sf_complexalloc(nzx2);
if (correct) {
curr1 = sf_complexalloc(nzx2);
curr2 = sf_complexalloc(nzx2);
}
currm = sf_complexalloc(nzx2);
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nk,m2);
wave2 = sf_complexalloc2(nzx2,m2);
icfft2_allocate(cwavem);
/* initialization */
for (ix = 0; ix < nx2; ix++) {
for (iz=0; iz < nz2; iz++) {
j = iz+ix*nz2;
if (ix<nx && iz<nz)
curr[j] = ini[ix][iz];
else
curr[j] = sf_cmplx(0.,0.);
}
}
wfit = 0;
/* MAIN LOOP */
for (it=0; it<nt; it++) {
if(verb) sf_warning("it=%d;",it);
/* outout wavefield */
if(snap>0) {
if(it%snap==0 && wfit<=(int)(nt-1)/snap) {
for (ix=0; ix<nx; ix++)
for (iz=0; iz<nz; iz++)
wvfld[wfit][ix][iz] = curr[iz+ix*nz2];
wfit++;
}
}
if (mode[0]=='m') {
/* matrix multiplication */
for (im = 0; im < m2; im++) {
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
currm[j] = lt[im][i]*curr[j];
#else
currm[j] = sf_cmul(lt[im][i], curr[j]);
#endif
}
}
cfft2(currm,wave[im]);
}
for (ik = 0; ik < nk; ik++) {
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += wave[im][ik]*rt[ik][im];
#else
c += sf_cmul(wave[im][ik],rt[ik][im]); //complex multiplies complex
#endif
}
cwave[ik] = c;
}
/* matrix multiplication */
for (im = 0; im < m2; im++) {
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]); //complex multiplies complex
#endif
}
icfft2(wave2[im],cwavem);
}
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += lt[im][i]*wave2[im][j];
#else
c += sf_cmul(lt[im][i], wave2[im][j]);
#endif
}
curr[j] = c;
}
}
if (correct) {
for (ix = 0; ix < nx2; ix++) {
for (iz=0; iz < nz2; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
if (ix<nx && iz<nz) {
#ifdef SF_HAS_COMPLEX_H
currm[j] = curr[j]/alpha[i];
#else
currm[j] = sf_cdiv(curr[j],alpha[i]);
#endif
} else {
currm[j] = sf_cmplx(0.,0.);
}
}
}
cfft2(currm,cwave);
for (ik = 0; ik < nk; ik++) {
#ifdef SF_HAS_COMPLEX_H
cwavem[ik] = cwave[ik]/beta[ik];
#else
cwavem[ik] = sf_cdiv(cwave[ik],beta[ik]);
#endif
}
icfft2(curr1,cwavem);
for (ix = nx; ix < nx2; ix++) {
for (iz=nz; iz < nz2; iz++) {
j = iz+ix*nz2; /* padded grid */
curr1[j] = sf_cmplx(0.,0.);
}
}
/**/
cfft2(curr,cwave);
for (ik = 0; ik < nk; ik++) {
#ifdef SF_HAS_COMPLEX_H
cwavem[ik] = cwave[ik]/conjf(beta[ik]);
#else
cwavem[ik] = sf_cdiv(cwave[ik],conjf(beta[ik]));
#endif
}
icfft2(curr,cwavem);
for (ix = 0; ix < nx2; ix++) {
for (iz=0; iz < nz2; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
if (ix<nx && iz<nz) {
#ifdef SF_HAS_COMPLEX_H
curr2[j] = curr[j]/conjf(alpha[i]);
#else
curr2[j] = sf_cdiv(curr[j],conjf(alpha[i]));
#endif
} else {
curr2[j] = sf_cmplx(0.,0.);
}
}
}
for (ix = 0; ix < nx2; ix++) {
for (iz=0; iz < nz2; iz++) {
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
curr[j] = (curr1[j] + curr2[j])/2.;
#else
curr[j] = sf_crmul(curr1[j]+curr2[j],0.5);
#endif
}
}
}
} else if (mode[0]=='x') {
cfft2(curr,cwave);
/* matrix multiplication */
for (im = 0; im < m2; im++) {
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]); //complex multiplies complex
#endif
}
icfft2(wave2[im],cwavem);
}
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += lt[im][i]*wave2[im][j];
#else
c += sf_cmul(lt[im][i], wave2[im][j]);
#endif
}
curr[j] = c;
}
}
/* matrix multiplication */
for (im = 0; im < m2; im++) {
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
currm[j] = lt[im][i]*curr[j];
#else
currm[j] = sf_cmul(lt[im][i], curr[j]);
#endif
}
}
cfft2(currm,wave[im]);
}
for (ik = 0; ik < nk; ik++) {
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += wave[im][ik]*rt[ik][im];
#else
c += sf_cmul(wave[im][ik],rt[ik][im]); //complex multiplies complex
#endif
}
cwavem[ik] = c;
}
icfft2(curr,cwavem);
if (correct) {
for (ix = 0; ix < nx2; ix++) {
for (iz=0; iz < nz2; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
if (ix<nx && iz<nz) {
#ifdef SF_HAS_COMPLEX_H
currm[j] = curr[j]/alpha[i];
#else
currm[j] = sf_cdiv(curr[j],alpha[i]);
#endif
} else {
currm[j] = sf_cmplx(0.,0.);
}
}
}
cfft2(currm,cwave);
for (ik = 0; ik < nk; ik++) {
#ifdef SF_HAS_COMPLEX_H
cwavem[ik] = cwave[ik]/beta[ik];
#else
cwavem[ik] = sf_cdiv(cwave[ik],beta[ik]);
#endif
}
icfft2(curr,cwavem);
for (ix = nx; ix < nx2; ix++) {
for (iz=nz; iz < nz2; iz++) {
j = iz+ix*nz2; /* padded grid */
curr[j] = sf_cmplx(0.,0.);
}
}
}
} else if (mode[0]=='n') {
/* matrix multiplication */
for (im = 0; im < m2; im++) {
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
currm[j] = lt[im][i]*curr[j];
#else
currm[j] = sf_cmul(lt[im][i], curr[j]);
#endif
}
}
cfft2(currm,wave[im]);
}
for (ik = 0; ik < nk; ik++) {
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += wave[im][ik]*rt[ik][im];
#else
c += sf_cmul(wave[im][ik],rt[ik][im]); //complex multiplies complex
#endif
}
cwavem[ik] = c;
}
icfft2(curr,cwavem);
/* matrix multiplication */
for (im = 0; im < m2; im++) {
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
currm[j] = lt[im][i]*curr[j];
#else
currm[j] = sf_cmul(lt[im][i], curr[j]);
#endif
}
}
cfft2(currm,wave[im]);
}
for (ik = 0; ik < nk; ik++) {
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += wave[im][ik]*rt[ik][im];
#else
c += sf_cmul(wave[im][ik],rt[ik][im]); //complex multiplies complex
#endif
}
cwavem[ik] = c;
}
icfft2(curr,cwavem);
} else if (mode[0]=='p') {
cfft2(curr,cwave);
/* matrix multiplication */
for (im = 0; im < m2; im++) {
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]); //complex multiplies complex
#endif
}
icfft2(wave2[im],cwavem);
}
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += lt[im][i]*wave2[im][j];
#else
c += sf_cmul(lt[im][i], wave2[im][j]);
#endif
}
curr[j] = c;
}
}
cfft2(curr,cwave);
/* matrix multiplication */
for (im = 0; im < m2; im++) {
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]); //complex multiplies complex
#endif
}
icfft2(wave2[im],cwavem);
}
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += lt[im][i]*wave2[im][j];
#else
c += sf_cmul(lt[im][i], wave2[im][j]);
#endif
}
curr[j] = c;
}
}
} else sf_error("Check mode parameter!");
} /* time stepping */
if(verb) sf_warning(".");
/* output final result*/
for (ix=0; ix<nx; ix++)
for (iz=0; iz<nz; iz++)
cc[ix][iz] = curr[iz+ix*nz2];
cfft2_finalize();
return 0;
}
int lrexp(sf_complex **img, sf_complex **dat, bool adj, sf_complex **lt, sf_complex **rt, sf_complex *ww, geopar geop, int pad1, bool verb, int snap, sf_complex ***wvfld)
/*< zero-offset exploding reflector modeling/migration >*/
{
int it, nt, ix, nx, nx2, iz, nz, nz2, nzx2, wfnt, wfit;
int im, i, j, m2, ik, nk;
float dt, dx, dz, ox;
sf_complex *curr, **wave, *cwave, *cwavem, c;
sf_complex *currm;
nx = geop->nx;
nz = geop->nz;
dx = geop->dx;
dz = geop->dz;
ox = geop->ox;
nt = geop->nt;
dt = geop->dt;
snap= geop->snap;
nzx2= geop->nzx2;
m2 = geop->m2;
wfnt= geop->wfnt;
nk = cfft2_init(pad1,nz,nx,&nz2,&nx2);
if (nk!=geop->nk) sf_error("nk discrepancy!");
curr = sf_complexalloc(nzx2);
cwave = sf_complexalloc(nk);
wave = sf_complexalloc2(nzx2,m2);
if (adj) {
currm = sf_complexalloc(nzx2);
icfft2_allocate(cwave);
} else {
cwavem = sf_complexalloc(nk);
icfft2_allocate(cwavem);
}
#ifdef _OPENMP
#pragma omp parallel for private(iz)
#endif
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
}
if (adj) { /* migration <- read wavefield */
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz)
#endif
for (ix=0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
curr[iz+ix*nz2]=dat[ix][iz];
}
}
wfit = (int)(nt-1)/snap; // wfnt-1
/* time stepping */
for (it=nt-1; it > -1; it--) {
if (verb) sf_warning("it=%d;",it);
/* matrix multiplication */
for (im = 0; im < m2; im++) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,i,j) shared(currm,lt,curr)
#endif
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
currm[j] = conjf(lt[im][i])*curr[j];
#else
currm[j] = sf_cmul(conjf(lt[im][i]), curr[j]);
#endif
}
}
cfft2(currm,wave[im]);
}
#ifdef _OPENMP
#pragma omp parallel for private(ik,im,c) shared(wave,rt,cwave)
#endif
for (ik = 0; ik < nk; ik++) {
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += wave[im][ik]*conjf(rt[ik][im]);
#else
c += sf_cmul(wave[im][ik],conjf(rt[ik][im])); //complex multiplies complex
#endif
}
cwave[ik] = c;
}
icfft2(curr,cwave);
if (snap > 0 && it%snap == 0) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,j)
#endif
for ( ix = 0; ix < nx; ix++) {
for ( iz = 0; iz<nz; iz++ ) {
j = iz+ix*nz2; /* padded grid */
wvfld[wfit][ix][iz] = curr[j];
}
}
wfit--;
}
} /*time iteration*/
/*generate image*/
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz)
#endif
for (ix=0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
img[ix][iz] = curr[iz+ix*nz2];
}
}
} else { /* modeling -> write data */
/*point source*/
wfit = 0;
/* time stepping */
for (it=0; it < nt; it++) {
if (verb) sf_warning("it=%d;",it);
/* matrix multiplication */
cfft2(curr,cwave);
for (im = 0; im < m2; 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,lt,wave)
#endif
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
c = ww[it] * crealf(img[ix][iz]); // source term
#else
c = sf_crmul(ww[it], crealf(img[ix][iz])); // source term
#endif
for (im = 0; im < m2; 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;
}
}
/* record wavefield*/
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz)
#endif
for (ix=0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
dat[ix][iz] = curr[iz+ix*nz2];
}
}
if (snap > 0 && it%snap == 0) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,j)
#endif
for ( ix = 0; ix < nx; ix++) {
for ( iz = 0; iz<nz; iz++ ) {
j = iz+ix*nz2; /* padded grid */
wvfld[wfit][ix][iz] = curr[j];
}
}
wfit++;
}
}
}
if (verb) sf_warning(".");
cfft2_finalize();
return 0;
}
int lrosfor2(sf_complex ***wavfld, float **sill, sf_complex **rcd, bool verb,
sf_complex **lt, sf_complex **rt, int m2,
geopar geop, sf_complex *ww, float *rr, int pad1)
/*< low-rank one-step forward modeling >*/
{
int it,iz,im,ik,ix,i,j; /* index variables */
int nxb,nzb,dx,dz,spx,spz,gpz,gpx,gpl,snpint,dt,nth=1,wfit;
int nt,nz,nx, nk, nzx, nz2, nx2, nzx2;
sf_complex c;
sf_complex *cwave, *cwavem;
sf_complex **wave, *curr;
nx = geop->nx;
nz = geop->nz;
nxb = geop->nxb;
nzb = geop->nzb;
dx = geop->dx;
dz = geop->dz;
spx = geop->spx;
spz = geop->spz;
gpz = geop->gpz;
gpx = geop->gpx;
gpl = geop->gpl;
snpint = geop->snpint;
nt = geop->nt;
dt = geop->dt;
#ifdef _OPENMP
#pragma omp parallel
{
nth = omp_get_num_threads();
}
sf_warning(">>>> Using %d threads <<<<<", nth);
#endif
/*Matrix dimensions*/
nk = cfft2_init(pad1,nzb,nxb,&nz2,&nx2);
nzx = nzb*nxb;
nzx2 = nz2*nx2;
curr = sf_complexalloc(nzx2);
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nzx2,m2);
icfft2_allocate(cwavem);
#ifdef _OPENMP
#pragma omp parallel for private(iz)
#endif
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
}
/*Main loop*/
wfit = 0;
for (it = 0; it < nt; it++) {
if (verb) sf_warning("Forward source it=%d/%d;", it, nt-1);
/*matrix multiplication*/
cfft2(curr,cwave);
for (im = 0; im < m2; 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,lt,wave)
#endif
for (ix = 0; ix < nxb; ix++) {
for (iz=0; iz < nzb; iz++) {
i = iz+ix*nzb; /* original grid */
j = iz+ix*nz2; /* padded grid */
if ((it*dt)<=geop->trunc) {
#ifdef SF_HAS_COMPLEX_H
c = ww[it] * rr[i]; // source term
#else
c = sf_crmul(ww[it], rr[i]); // source term
#endif
} else {
c = sf_cmplx(0.,0.);
}
for (im = 0; im < m2; 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;
}
}
#ifdef _OPENMP
#pragma omp parallel for private(ix,j)
#endif
for ( ix =0 ; ix < gpl; ix++) {
j = (gpz+geop->top)+(ix+gpx+geop->lft)*nz2; /* padded grid */
rcd[ix][it] = curr[j];
}
if ( it%snpint == 0 ) {
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,j)
#endif
for ( ix = 0; ix < nx; ix++) {
for ( iz = 0; iz<nz; iz++ ) {
j = (iz+geop->top)+(ix+geop->lft)*nz2; /* padded grid */
wavfld[wfit][ix][iz] = curr[j];
sill[ix][iz] += pow(hypotf(crealf(curr[j]),cimagf(curr[j])),2);
//sill[ix][iz] += pow(hypotf(crealf(wavfld[wfit][ix][iz]),cimagf(wavfld[wfit][ix][iz])),2);
}
}
wfit++;
}
} /*Main loop*/
if (verb) sf_warning(".");
cfft2_finalize();
return wfit;
}
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[])
{
bool verb,complx,sub,os;
int it,iz,im,ik,ix,i,j; /* index variables */
int nt,nz,nx, m2, nk, nzx, nz2, nx2, nzx2, n2, pad1,nth;
sf_complex c,old;
/* I/O arrays*/
sf_complex *ww,*curr,*prev,*cwave,*cwavem,**wave,**lt, **rt;
float *rcurr,*rr;
sf_file Fw,Fr,Fo; /* I/O files */
sf_axis at,az,ax; /* cube axes */
sf_file left, right;
sf_init(argc,argv);
if(!sf_getbool("verb",&verb)) verb=false; /* verbosity */
if(!sf_getbool("cmplx",&complx)) complx=true; /* outputs complex wavefield */
if(!sf_getbool("os",&os)) os=true; /* one-step flag */
if (os) {
sf_warning("One-step wave extrapolation");
if(!sf_getbool("sub",&sub)) sub=false; /* subtraction flag */
} else {
sf_warning("Two-step wave extrapolation");
if(!sf_getbool("sub",&sub)) sub=true; /* subtraction flag */
}
/* setup I/O files */
Fw = sf_input ("in" );
Fo = sf_output("out");
Fr = sf_input ("ref");
if (SF_COMPLEX != sf_gettype(Fw)) sf_error("Need complex input");
if (SF_FLOAT != sf_gettype(Fr)) sf_error("Need float ref");
if(complx)
sf_settype(Fo,SF_COMPLEX);
else
sf_settype(Fo,SF_FLOAT);
/* Read/Write axes */
at = sf_iaxa(Fw,1);
nt = sf_n(at);
az = sf_iaxa(Fr,1);
nz = sf_n(az);
ax = sf_iaxa(Fr,2);
nx = sf_n(ax);
sf_oaxa(Fo,az,1);
sf_oaxa(Fo,ax,2);
sf_oaxa(Fo,at,3);
if (!sf_getint("pad1",&pad1)) pad1=1; /* padding factor on the first axis */
#ifdef _OPENMP
#pragma omp parallel
{
nth = omp_get_num_threads();
}
if (verb) sf_warning(">>>> Using %d threads <<<<<", nth);
#endif
nk = cfft2_init(pad1,nz,nx,&nz2,&nx2);
nzx = nz*nx;
nzx2 = nz2*nx2;
/* propagator matrices */
left = sf_input("left");
right = sf_input("right");
if (!sf_histint(left,"n1",&n2) || n2 != nzx) sf_error("Need n1=%d in left",nzx);
if (!sf_histint(left,"n2",&m2)) sf_error("Need n2= in left");
if (!sf_histint(right,"n1",&n2) || n2 != m2) sf_error("Need n1=%d in right",m2);
if (!sf_histint(right,"n2",&n2) || n2 != nk) sf_error("Need n2=%d in right",nk);
lt = sf_complexalloc2(nzx,m2);
rt = sf_complexalloc2(m2,nk);
sf_complexread(lt[0],nzx*m2,left);
sf_complexread(rt[0],m2*nk,right);
sf_fileclose(left);
sf_fileclose(right);
/* read wavelet & reflectivity */
ww=sf_complexalloc(nt);
sf_complexread(ww,nt ,Fw);
rr=sf_floatalloc(nzx);
sf_floatread(rr,nzx,Fr);
curr = sf_complexalloc(nzx2);
if (!os) prev = sf_complexalloc(nzx2);
else prev = NULL;
if(!complx) rcurr = sf_floatalloc(nzx2);
else rcurr=NULL;
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nzx2,m2);
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
if (!os) prev[iz] = sf_cmplx(0.,0.);
if(!complx) rcurr[iz]= 0.;
}
/* MAIN LOOP */
for (it=0; it<nt; it++) {
if(verb) sf_warning("it=%d;",it);
/* matrix multiplication */
cfft2(curr,cwave);
for (im = 0; im < m2; im++) {
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]); //complex multiplies complex
#endif
}
icfft2(wave[im],cwavem);
}
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
c = ww[it] * rr[i]; // source term
#else
c = sf_crmul(ww[it], rr[i]); // source term
#endif
if (sub) c += curr[j];
if (!os) {
old = curr[j];
#ifdef SF_HAS_COMPLEX_H
c += sub? (old-prev[j]) : -prev[j];
#else
c = sf_cadd(c,sub? sf_csub(old,prev[j]) : sf_cneg(prev[j]));
#endif
prev[j] = old;
}
for (im = 0; im < m2; 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 (!complx) rcurr[j] = crealf(c);
}
/* write wavefield to output */
if (complx)
sf_complexwrite(curr+ix*nz2,nz,Fo);
else
sf_floatwrite(rcurr+ix*nz2,nz,Fo);
}
}
if(verb) sf_warning(".");
cfft2_finalize();
exit (0);
}
int prop1Pa(sf_complex *input, sf_complex *output, sf_complex *lt, sf_complex *rt, int nz, int nx, int nkzx, int m2)
/*< Just nsps(-) >*/
{
int iz, ix, im, ik, i, j;
int nz2, nx2, nk, nzx, nzx2;
int pad1 = 1;
sf_complex **wave, **wave2, *curr, *currm, *cwave, *cwavem, c;
nk = cfft2_init(pad1,nz,nx,&nz2,&nx2);
if (nk!=nkzx) sf_error("nk discrepancy!");
nzx = nz*nx;
nzx2 = nz2*nx2;
curr = sf_complexalloc(nzx2);
currm = sf_complexalloc(nzx2);
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nk,m2);
wave2 = sf_complexalloc2(nzx2,m2);
icfft2_allocate(cwave);
/* initialization */
for (ix = 0; ix < nx2; ix++) {
for (iz=0; iz < nz2; iz++) {
i = iz+ix*nz;
j = iz+ix*nz2;
if (ix<nx && iz<nz)
curr[j] = input[i];
else
curr[j] = sf_cmplx(0.,0.);
}
}
/* nsps(-) */
/* matrix multiplication */
for (im = 0; im < m2; im++) {
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
currm[j] = conjf(lt[im*nzx+i])*curr[j];
#else
currm[j] = sf_cmul(conjf(lt[im*nzx+i]), curr[j]);
#endif
}
}
cfft2(currm,wave[im]);
}
for (ik = 0; ik < nk; ik++) {
c = sf_cmplx(0.,0.);
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += wave[im][ik]*conjf(rt[ik*m2+im]);
#else
c += sf_cmul(wave[im][ik],conjf(rt[ik*m2+im]));
#endif
}
cwave[ik] = c;
}
/* saving a pair of FFTs */
icfft2(curr,cwave);
/* output final result*/
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz;
j = iz+ix*nz2;
output[i] = curr[j];
}
}
cfft2_finalize();
return 0;
}
int main(int argc, char* argv[])
{
bool verb;
int it,iz,im,ik,ix,i,j; /* index variables */
int nt,nz,nx, m2, nk, nzx, nz2, nx2, nzx2, n2, pad1;
sf_complex c;
float *rr; /* I/O arrays*/
sf_complex *ww, *cwave, *cwavem;
sf_complex **wave, *curr;
sf_file Fw,Fr,Fo; /* I/O files */
sf_axis at,az,ax; /* cube axes */
sf_complex **lt, **rt;
sf_file left, right;
sf_init(argc,argv);
if(!sf_getbool("verb",&verb)) verb=false; /* verbosity */
/* setup I/O files */
Fw = sf_input ("in" );
Fo = sf_output("out");
Fr = sf_input ("ref");
if (SF_COMPLEX != sf_gettype(Fw)) sf_error("Need complex input");
if (SF_FLOAT != sf_gettype(Fr)) sf_error("Need float ref");
sf_settype(Fo,SF_COMPLEX);
/* Read/Write axes */
at = sf_iaxa(Fw,1); nt = sf_n(at);
az = sf_iaxa(Fr,1); nz = sf_n(az);
ax = sf_iaxa(Fr,2); nx = sf_n(ax);
sf_oaxa(Fo,az,1);
sf_oaxa(Fo,ax,2);
sf_oaxa(Fo,at,3);
if (!sf_getint("pad1",&pad1)) pad1=1; /* padding factor on the first axis */
nk = cfft2_init(pad1,nz,nx,&nz2,&nx2);
nzx = nz*nx;
nzx2 = nz2*nx2;
/* propagator matrices */
left = sf_input("left");
right = sf_input("right");
if (!sf_histint(left,"n1",&n2) || n2 != nzx) sf_error("Need n1=%d in left",nzx);
if (!sf_histint(left,"n2",&m2)) sf_error("Need n2= in left");
if (!sf_histint(right,"n1",&n2) || n2 != m2) sf_error("Need n1=%d in right",m2);
if (!sf_histint(right,"n2",&n2) || n2 != nk) sf_error("Need n2=%d in right",nk);
// if (!sf_histint(Fw,"n1",&nxx)) sf_error("No n1= in input");
lt = sf_complexalloc2(nzx,m2);
rt = sf_complexalloc2(m2,nk);
sf_complexread(lt[0],nzx*m2,left);
sf_complexread(rt[0],m2*nk,right);
// sf_fileclose(left);
// sf_fileclose(right);
/* read wavelet & reflectivity */
ww=sf_complexalloc(nt);
sf_complexread(ww,nt ,Fw);
rr=sf_floatalloc(nzx);
sf_floatread(rr,nzx,Fr);
curr = sf_complexalloc(nzx2);
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nzx2,m2);
icfft2_allocate(cwavem);
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
}
/* MAIN LOOP */
for (it=0; it<nt; it++) {
if(verb) sf_warning("it=%d;",it);
/* matrix multiplication */
cfft2(curr,cwave);
for (im = 0; im < m2; im++) {
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]); //complex multiplies complex
#endif
// sf_warning("realcwave=%g, imagcwave=%g", crealf(cwavem[ik]),cimagf(cwavem[ik]));
}
icfft2(wave[im],cwavem);
}
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
c = ww[it] * rr[i]; // source term
#else
c = sf_crmul(ww[it], rr[i]); // source term
#endif
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += lt[im][i]*wave[im][j];
#else
c = sf_cadd(c,sf_cmul(lt[im][i], wave[im][j]));
#endif
}
curr[j] = c;
}
/* write wavefield to output */
sf_complexwrite(curr+ix*nz2,nz,Fo);
}
}
if(verb) sf_warning(".");
cfft2_finalize();
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,complx,sub,os;
int it,iz,im,ik,ix,i,j; /* index variables */
int nt,nz,nx, m2, nk, nzx, nz2, nx2, nzx2, n2, pad1,nth;
sf_complex c,old;
int snap;
/* I/O arrays*/
sf_complex *ww,*curr,*prev,*cwave,*cwavem,**wave,**lt, **rt;
float *rcurr,*rr;
sf_file Fw,Fr,Fo; /* I/O files */
sf_axis at,az,ax; /* cube axes */
sf_file left, right;
sf_file snaps;
/*for tapering*/
float dt,dx,dz,dkx,dkz,kx0,kz0,kx,kz,ktmp,kx_trs,kz_trs,thresh;
float *ktp;
int taper;
sf_init(argc,argv);
if(!sf_getbool("verb",&verb)) verb=false; /* verbosity */
if(!sf_getbool("cmplx",&complx)) complx=true; /* outputs complex wavefield */
if(!sf_getbool("os",&os)) os=true; /* one-step flag */
if (os) {
sf_warning("One-step wave extrapolation");
if(!sf_getbool("sub",&sub)) sub=false; /* subtraction flag */
} else {
sf_warning("Two-step wave extrapolation");
if(!sf_getbool("sub",&sub)) sub=true; /* subtraction flag */
}
if (!sf_getint("taper",&taper)) taper=0; /* tapering in the frequency domain */
if (!sf_getfloat("thresh",&thresh)) thresh=0.92; /* tapering threshold */
/* setup I/O files */
Fw = sf_input ("in" );
Fo = sf_output("out");
Fr = sf_input ("ref");
if (SF_COMPLEX != sf_gettype(Fw)) sf_error("Need complex input");
if (SF_FLOAT != sf_gettype(Fr)) sf_error("Need float ref");
if(complx)
sf_settype(Fo,SF_COMPLEX);
else
sf_settype(Fo,SF_FLOAT);
/* Read/Write axes */
at = sf_iaxa(Fw,1); nt = sf_n(at); dt = sf_d(at);
az = sf_iaxa(Fr,1); nz = sf_n(az); dz = sf_d(az);
ax = sf_iaxa(Fr,2); nx = sf_n(ax); dx = sf_d(ax);
sf_oaxa(Fo,az,1);
sf_oaxa(Fo,ax,2);
if (!sf_getint("snap",&snap)) snap=0;
/* interval for snapshots */
if (snap > 0) {
snaps = sf_output("snaps");
/* (optional) snapshot file */
sf_oaxa(snaps,az,1);
sf_oaxa(snaps,ax,2);
sf_oaxa(snaps,at,3);
sf_putint(snaps,"n3",nt/snap);
sf_putfloat(snaps,"d3",dt*snap);
sf_putfloat(snaps,"o3",0.);
if(complx)
sf_settype(snaps,SF_COMPLEX);
else
sf_settype(snaps,SF_FLOAT);
} else {
snaps = NULL;
}
if (!sf_getint("pad1",&pad1)) pad1=1; /* padding factor on the first axis */
#ifdef _OPENMP
#pragma omp parallel
{
nth = omp_get_num_threads();
}
if (verb) sf_warning(">>>> Using %d threads <<<<<", nth);
#endif
nk = cfft2_init(pad1,nz,nx,&nz2,&nx2);
nzx = nz*nx;
nzx2 = nz2*nx2;
/* propagator matrices */
left = sf_input("left");
right = sf_input("right");
if (!sf_histint(left,"n1",&n2) || n2 != nzx) sf_error("Need n1=%d in left",nzx);
if (!sf_histint(left,"n2",&m2)) sf_error("Need n2= in left");
if (!sf_histint(right,"n1",&n2) || n2 != m2) sf_error("Need n1=%d in right",m2);
if (!sf_histint(right,"n2",&n2) || n2 != nk) sf_error("Need n2=%d in right",nk);
lt = sf_complexalloc2(nzx,m2);
rt = sf_complexalloc2(m2,nk);
sf_complexread(lt[0],nzx*m2,left);
sf_complexread(rt[0],m2*nk,right);
sf_fileclose(left);
sf_fileclose(right);
/* read wavelet & reflectivity */
ww=sf_complexalloc(nt);
sf_complexread(ww,nt ,Fw);
rr=sf_floatalloc(nzx);
sf_floatread(rr,nzx,Fr);
curr = sf_complexalloc(nzx2);
if (!os) prev = sf_complexalloc(nzx2);
else prev = NULL;
if(!complx) rcurr = sf_floatalloc(nzx2);
else rcurr=NULL;
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nzx2,m2);
/*icfft2_allocate(cwavem);*/
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
if (!os) prev[iz] = sf_cmplx(0.,0.);
if(!complx) rcurr[iz]= 0.;
}
if (taper!=0) {
dkz = 1./(nz2*dz); kz0 = -0.5/dz;
dkx = 1./(nx2*dx); kx0 = -0.5/dx;
kx_trs = thresh*fabs(0.5/dx);
kz_trs = thresh*fabs(0.5/dz);
sf_warning("dkz=%f,dkx=%f,kz0=%f,kx0=%f",dkz,dkx,kz0,kx0);
sf_warning("nk=%d,nkz=%d,nkx=%d",nk,nz2,nx2);
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 < nx2; ix++) {
kx = kx0+ix*dkx;
for (iz=0; iz < nz2; iz++) {
kz = kz0+iz*dkz;
ktmp = 1.;
if (fabs(kx) > kx_trs)
ktmp *= (fabs(kx)>kx_trs)? powf((fabs(kx0)-fabs(kx)+kx_trs)/kx0,2) : 1.;
if (fabs(kz) > kz_trs)
ktmp *= (fabs(kz)>kz_trs)? powf((fabs(kz0)-fabs(kz)+kz_trs)/kz0,2) : 1.;
ktp[iz+ix*nz2] = ktmp;
}
}
}
/* MAIN LOOP */
for (it=0; it<nt; it++) {
if(verb) sf_warning("it=%d;",it);
/* matrix multiplication */
cfft2(curr,cwave);
for (im = 0; im < m2; im++) {
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]); //complex multiplies complex
#endif
}
icfft2(wave[im],cwavem);
}
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz+ix*nz; /* original grid */
j = iz+ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
c = ww[it] * rr[i]; // source term
#else
c = sf_crmul(ww[it], rr[i]); // source term
#endif
if (sub) c += curr[j];
if (!os) {
old = curr[j];
#ifdef SF_HAS_COMPLEX_H
c += sub? (old-prev[j]) : -prev[j];
#else
c = sf_cadd(c,sub? sf_csub(old,prev[j]) : sf_cneg(prev[j]));
#endif
prev[j] = old;
}
for (im = 0; im < m2; 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 (!complx) rcurr[j] = crealf(c);
}
if (NULL != snaps && 0 == it%snap) {
/* write wavefield snapshots */
if (complx)
sf_complexwrite(curr+ix*nz2,nz,snaps);
else
sf_floatwrite(rcurr+ix*nz2,nz,snaps);
}
}
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 (!os) {
cfft2(prev,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(prev,cwavem);
}
}
}
}
if(verb) sf_warning(".");
/* write final wavefield to output */
for (ix = 0; ix < nx; ix++) {
if (complx)
sf_complexwrite(curr+ix*nz2,nz,Fo);
else
sf_floatwrite(rcurr+ix*nz2,nz,Fo);
}
cfft2_finalize();
exit (0);
}
int main(int argc, char* argv[])
{
bool verb,sub,os;
int it,iz,im,ikx,ikz,ix,i,j; /* index variables */
int nt,nz,nx, m2, nk, nzx, nz2, nx2, nzx2, n2, pad1,nth;
sf_complex c,old;
/* I/O arrays*/
sf_complex *ww,*curr,*prev,*cwave,*cwavem,**wave,**lt, **rt;
sf_complex *snap;
float *rr;
sf_file Fw,Fr,Fo; /* I/O files */
sf_axis at,az,ax; /* cube axes */
sf_file left, right;
/*MPI related*/
int cpuid,numprocs;
int provided;
int n_local, o_local;
int ozx2;
sf_complex *sendbuf, *recvbuf;
int *rcounts, *displs;
//MPI_Init(&argc,&argv);
MPI_Init_thread(&argc,&argv,MPI_THREAD_FUNNELED,&provided);
threads_ok = provided >= MPI_THREAD_FUNNELED;
sf_init(argc,argv);
MPI_Comm_rank(MPI_COMM_WORLD, &cpuid);
MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
if(!sf_getbool("verb",&verb)) verb=false; /* verbosity */
if(!sf_getbool("os",&os)) os=true; /* one-step flag */
if (os) {
sf_warning("One-step wave extrapolation");
if(!sf_getbool("sub",&sub)) sub=false; /* subtraction flag */
} else {
sf_warning("Two-step wave extrapolation");
if(!sf_getbool("sub",&sub)) sub=true; /* subtraction flag */
}
/* setup I/O files */
Fw = sf_input ("--input" );
Fo = sf_output("--output");
Fr = sf_input ("ref");
if (SF_COMPLEX != sf_gettype(Fw)) sf_error("Need complex input");
if (SF_FLOAT != sf_gettype(Fr)) sf_error("Need float ref");
sf_settype(Fo,SF_COMPLEX);
/* Read/Write axes */
at = sf_iaxa(Fw,1); nt = sf_n(at);
az = sf_iaxa(Fr,1); nz = sf_n(az);
ax = sf_iaxa(Fr,2); nx = sf_n(ax);
if (cpuid==0) {
sf_oaxa(Fo,az,1);
sf_oaxa(Fo,ax,2);
//sf_setn(at,1);
sf_oaxa(Fo,at,3);
}
if (!sf_getint("pad1",&pad1)) pad1=1; /* padding factor on the first axis */
#pragma omp parallel
{
nth = omp_get_num_threads();
}
if (verb) sf_warning(">>>> Using %d threads <<<<<", nth);
nk = cfft2_init(pad1,nz,nx,&nz2,&nx2,&n_local,&o_local);
sf_warning("Cpuid=%d,n0=%d,n1=%d,local_n0=%d,local_0_start=%d",cpuid,nz2,nx2,n_local,o_local);
nzx = nz*nx;
// nzx2 = nz2*nx2;
nzx2 = n_local*nz2;
ozx2 = o_local*nz2;
/* propagator matrices */
left = sf_input("left");
right = sf_input("right");
if (!sf_histint(left,"n1",&n2) || n2 != nzx) sf_error("Need n1=%d in left",nzx);
if (!sf_histint(left,"n2",&m2)) sf_error("Need n2= in left");
if (!sf_histint(right,"n1",&n2) || n2 != m2) sf_error("Need n1=%d in right",m2);
if (!sf_histint(right,"n2",&n2) || n2 != nk) sf_error("Need n2=%d in right",nk);
lt = sf_complexalloc2(nzx,m2);
rt = sf_complexalloc2(m2,nk);
sf_complexread(lt[0],nzx*m2,left);
sf_complexread(rt[0],m2*nk,right);
sf_fileclose(left);
sf_fileclose(right);
/* read wavelet & reflectivity */
ww=sf_complexalloc(nt);
sf_complexread(ww,nt ,Fw);
rr=sf_floatalloc(nzx);
sf_floatread(rr,nzx,Fr);
curr = sf_complexalloc(nzx2);
if (!os) prev = sf_complexalloc(nzx2);
else prev = NULL;
cwave = sf_complexalloc(nzx2);
cwavem = sf_complexalloc(nzx2);
wave = sf_complexalloc2(nzx2,m2);
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
if (!os) prev[iz] = sf_cmplx(0.,0.);
}
sendbuf = curr;
if (cpuid==0) {
snap = sf_complexalloc(nz2*nx2);
recvbuf = snap;
rcounts = sf_intalloc(numprocs);
displs = sf_intalloc(numprocs);
} else {
snap = NULL;
recvbuf = NULL;
rcounts = NULL;
displs = NULL;
}
MPI_Gather(&nzx2, 1, MPI_INT, rcounts, 1, MPI_INT, 0, MPI_COMM_WORLD);
MPI_Gather(&ozx2, 1, MPI_INT, displs, 1, MPI_INT, 0, MPI_COMM_WORLD);
/* MAIN LOOP */
for (it=0; it<nt; it++) {
if(verb) sf_warning("it=%d;",it);
/* matrix multiplication */
cfft2(curr,cwave);
for (im = 0; im < m2; im++) {
//for (ik = 0; ik < nk; ik++) {
for (ikx = 0; ikx < n_local; ikx++) {
for (ikz = 0; ikz < nz2; ikz++) {
i = ikz + (o_local+ikx)*nz2;
j = ikz + ikx*nz2;
#ifdef SF_HAS_COMPLEX_H
cwavem[j] = cwave[j]*rt[i][im];
#else
cwavem[j] = sf_cmul(cwave[j],rt[i][im]);
#endif
}
}
icfft2(wave[im],cwavem);
}
for (ix = 0; ix < n_local && (ix+o_local)<nx ; ix++) {
for (iz=0; iz < nz; iz++) {
i = iz + (o_local+ix)*nz; /* original grid */
j = iz + ix*nz2; /* padded grid */
#ifdef SF_HAS_COMPLEX_H
c = ww[it] * rr[i]; // source term
#else
c = sf_crmul(ww[it], rr[i]); // source term
#endif
if (sub) c += curr[j];
if (!os) {
old = curr[j];
#ifdef SF_HAS_COMPLEX_H
c += sub? (old-prev[j]) : -prev[j];
#else
c = sf_cadd(c,sub? sf_csub(old,prev[j]) : sf_cneg(prev[j]));
#endif
prev[j] = old;
}
for (im = 0; im < m2; 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;
}
}
/* write wavefield to output */
MPI_Gatherv(sendbuf, nzx2, MPI_COMPLEX, recvbuf, rcounts, displs, MPI_COMPLEX, 0, MPI_COMM_WORLD);
if (cpuid==0) {
for (ix = 0; ix < nx; ix++)
sf_complexwrite(snap+ix*nz2,nz,Fo);
}
}
if(verb) sf_warning(".");
cfft2_finalize();
MPI_Finalize();
exit (0);
}
int main(int argc, char* argv[])
{
bool mig,timer;
int it, nt, ix, nx, iz, nz, nx2, nz2, nzx, nzx2, pad1;
int im, i, j, m2, it1, it2, its, ik, n2, nk;
float dt, dx, dz,x0;
sf_complex *curr, **img, *dat, **lft, **rht, **wave, *cwave, *cwavem, c;
sf_file data, image, left, right;
double time=0.,t0=0.,t1=0.;
sf_init(argc,argv);
if (!sf_getbool("mig",&mig)) mig=false;
/* if n, modeling; if y, migration */
if(! sf_getbool("timer",&timer)) timer=false;
if (!sf_getint("pad1",&pad1)) pad1=1; /* padding factor on the first axis */
if (mig) { /* migration */
data = sf_input("in");
image = sf_output("out");
sf_settype(image,SF_COMPLEX);
if (!sf_histint(data,"n1",&nx)) sf_error("No n1= in input");
if (!sf_histfloat(data,"d1",&dx)) sf_error("No d1= in input");
if (!sf_histfloat(data,"o1",&x0)) x0=0.;
if (!sf_histint(data,"n2",&nt)) sf_error("No n2= in input");
if (!sf_histfloat(data,"d2",&dt)) sf_error("No d2= in input");
if (!sf_getint("nz",&nz)) sf_error("Need nz=");
/* depth samples (if migration) */
if (!sf_getfloat("dz",&dz)) sf_error("Need dz=");
/* depth sampling (if migration) */
sf_putint(image,"n1",nz);
sf_putfloat(image,"d1",dz);
sf_putfloat(image,"o1",0.);
sf_putstring(image,"label1","Depth");
sf_putint(image,"n2",nx);
sf_putfloat(image,"d2",dx);
sf_putfloat(image,"o2",x0);
sf_putstring(image,"label2","Distance");
} else { /* modeling */
image = sf_input("in");
data = sf_output("out");
sf_settype(data,SF_COMPLEX);
if (!sf_histint(image,"n1",&nz)) sf_error("No n1= in input");
if (!sf_histfloat(image,"d1",&dz)) sf_error("No d1= in input");
if (!sf_histint(image,"n2",&nx)) sf_error("No n2= in input");
if (!sf_histfloat(image,"d2",&dx)) sf_error("No d2= in input");
if (!sf_histfloat(image,"o2",&x0)) x0=0.;
if (!sf_getint("nt",&nt)) sf_error("Need nt=");
/* time samples (if modeling) */
if (!sf_getfloat("dt",&dt)) sf_error("Need dt=");
/* time sampling (if modeling) */
sf_putint(data,"n1",nx);
sf_putfloat(data,"d1",dx);
sf_putfloat(data,"o1",x0);
sf_putstring(data,"label1","Distance");
sf_putint(data,"n2",nt);
sf_putfloat(data,"d2",dt);
sf_putfloat(data,"o2",0.);
sf_putstring(data,"label2","Time");
sf_putstring(data,"unit2","s");
}
nk = cfft2_init(pad1,nx,nz,&nx2,&nz2);
nzx = nz*nx;
nzx2 = nz2*nx2;
img = sf_complexalloc2(nz,nx);
dat = sf_complexalloc(nx);
/* propagator matrices */
left = sf_input("left");
right = sf_input("right");
if (!sf_histint(left,"n1",&n2) || n2 != nzx) sf_error("Need n1=%d in left",nzx);
if (!sf_histint(left,"n2",&m2)) sf_error("No n2= in left");
if (!sf_histint(right,"n1",&n2) || n2 != m2) sf_error("Need n1=%d in right",m2);
if (!sf_histint(right,"n2",&n2) || n2 != nk) sf_error("Need n2=%d in right",nk);
lft = sf_complexalloc2(nzx,m2);
rht = sf_complexalloc2(m2,nk);
sf_complexread(lft[0],nzx*m2,left);
sf_complexread(rht[0],m2*nk,right);
curr = sf_complexalloc(nzx2);
cwave = sf_complexalloc(nk);
cwavem = sf_complexalloc(nk);
wave = sf_complexalloc2(nzx2,m2);
icfft2_allocate(cwavem);
for (iz=0; iz < nzx2; iz++) {
curr[iz] = sf_cmplx(0.,0.);
}
if (mig) { /* migration */
/* step backward in time */
it1 = nt-1;
it2 = -1;
its = -1;
} else { /* modeling */
sf_complexread(img[0],nzx,image);
/* transpose */
for (ix=0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
curr[ix+iz*nx2]=img[ix][iz];
}
}
/* step forward in time */
it1 = 0;
it2 = nt;
its = +1;
}
if (timer) t0 = gtod_timer();
/* time stepping */
for (it=it1; it != it2; it += its) {
sf_warning("it=%d;",it);
if (mig) { /* migration <- read data */
sf_complexread(dat,nx,data);
} else {
for (ix=0; ix < nx; ix++) {
dat[ix] = sf_cmplx(0.,0.);
}
}
for (ix=0; ix < nx; ix++) {
if (mig) {
#ifdef SF_HAS_COMPLEX_H
curr[ix] += dat[ix];
#else
curr[ix] = sf_cadd(curr[ix],dat[ix]);
#endif
} else {
dat[ix] = curr[ix];
}
}
/* matrix multiplication */
cfft2(curr,cwave);
for (im = 0; im < m2; im++) {
for (ik = 0; ik < nk; ik++) {
#ifdef SF_HAS_COMPLEX_H
cwavem[ik] = cwave[ik]*rht[ik][im];
#else
cwavem[ik] = sf_cmul(cwave[ik],rht[ik][im]);
#endif
}
icfft2(wave[im],cwavem);
}
#ifdef _OPENMP
#pragma omp parallel for private(ix,iz,i,j,im,c) shared(curr,lft,wave)
#endif
for (ix = 0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
i = ix+iz*nx; /* original grid */
j = ix+iz*nx2; /* padded grid */
c = sf_cmplx(0.,0.); /* initialize */
for (im = 0; im < m2; im++) {
#ifdef SF_HAS_COMPLEX_H
c += lft[im][i]*wave[im][j];
#else
c = sf_cadd(c,sf_cmul(lft[im][i], wave[im][j]));
#endif
}
curr[j] = c;
}
}
if (!mig) { /* modeling -> write out data */
sf_complexwrite(dat,nx,data);
}
}
sf_warning(".");
if (timer)
{
t1 = gtod_timer();
time = t1-t0;
sf_warning("Time = %lf\n",time);
}
if (mig) {
/* transpose */
for (ix=0; ix < nx; ix++) {
for (iz=0; iz < nz; iz++) {
img[ix][iz] = curr[ix+iz*nx2];
}
}
sf_complexwrite(img[0],nzx,image);
}
cfft2_finalize();
exit(0);
}