Example #1
0
int main(int argc,char *argv[]){
  int eos=0;
  float nonz=0.f;
  float acc=0.f;
  float tot=0.f;
  float ampmax=-9999,newmax;
  float local_ampmax[2];

  int framesize=2048;
  float ampmax_att_per_sec=-6.;

  float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2];
  signed char *buffer,*buffer2;
  mdct_lookup m_look;
  drft_lookup f_look;
  vorbis_look_psy p_look;
  vorbis_look_psy_global *pg_look;
  vorbis_look_floor *floor_look;
  vorbis_info vi;
  long i,j,k;

  int ath=0;
  int decayp=0;

  argv++;
  while(*argv){
    if(*argv[0]=='-'){
      /* option */
      if(argv[0][1]=='v'){
	noisy=0;
      }
    }else
      if(*argv[0]=='+'){
	/* option */
	if(argv[0][1]=='v'){
	  noisy=1;
	}
      }else
	framesize=atoi(argv[0]);
    argv++;
  }
  
  vi.channels=2;
  vi.codec_setup=&codec_setup0;

  pcm[0]=_ogg_malloc(framesize*sizeof(float));
  pcm[1]=_ogg_malloc(framesize*sizeof(float));
  out[0]=_ogg_calloc(framesize/2,sizeof(float));
  out[1]=_ogg_calloc(framesize/2,sizeof(float));
  work[0]=_ogg_calloc(framesize,sizeof(float));
  work[1]=_ogg_calloc(framesize,sizeof(float));
  flr[0]=_ogg_calloc(framesize/2,sizeof(float));
  flr[1]=_ogg_calloc(framesize/2,sizeof(float));
  buffer=_ogg_malloc(framesize*4);
  buffer2=buffer+framesize*2;
  window=_vorbis_window(0,framesize,framesize/2,framesize/2);
  mdct_init(&m_look,framesize);
  drft_init(&f_look,framesize);
  _vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100);
  pg_look=_vp_global_look(&vi);
  floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0);

  /* we cheat on the WAV header; we just bypass 44 bytes and never
     verify that it matches 16bit/stereo/44.1kHz. */
  
  fread(buffer,1,44,stdin);
  fwrite(buffer,1,44,stdout);
  memset(buffer,0,framesize*2);

  analysis("window",0,window,framesize,0,0);

  fprintf(stderr,"Processing for frame size %d...\n",framesize);

  while(!eos){
    long bytes=fread(buffer2,1,framesize*2,stdin); 
    if(bytes<framesize*2)
      memset(buffer2+bytes,0,framesize*2-bytes);
    
    if(bytes!=0){
      int nonzero[2];

      /* uninterleave samples */
      for(i=0;i<framesize;i++){
        pcm[0][i]=((buffer[i*4+1]<<8)|
                      (0x00ff&(int)buffer[i*4]))/32768.f;
        pcm[1][i]=((buffer[i*4+3]<<8)|
		   (0x00ff&(int)buffer[i*4+2]))/32768.f;
      }
      
      {
	float secs=framesize/44100.;
	
	ampmax+=secs*ampmax_att_per_sec;
	if(ampmax<-9999)ampmax=-9999;
      }

      for(i=0;i<2;i++){
	float scale=4.f/framesize;
	float *fft=work[i];
	float *mdct=pcm[i];
	float *logmdct=mdct+framesize/2;

	analysis("pre",frameno+i,pcm[i],framesize,0,0);
	
	/* fft and mdct transforms  */
	for(j=0;j<framesize;j++)
	  fft[j]=pcm[i][j]*=window[j];
	
	drft_forward(&f_look,fft);

	local_ampmax[i]=-9999.f;
	fft[0]*=scale;
	fft[0]=todB(fft);
	for(j=1;j<framesize-1;j+=2){
	  float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
	  temp=fft[(j+1)>>1]=todB(&temp);
	  if(temp>local_ampmax[i])local_ampmax[i]=temp;
	}
	if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i];
	
	mdct_forward(&m_look,pcm[i],mdct);
	for(j=0;j<framesize/2;j++)
	  logmdct[j]=todB(mdct+j);

	analysis("mdct",frameno+i,logmdct,framesize/2,1,0);
	analysis("fft",frameno+i,fft,framesize/2,1,0);
      }

      for(i=0;i<2;i++){
	float amp;
	float *fft=work[i];
	float *logmax=fft;
	float *mdct=pcm[i];
	float *logmdct=mdct+framesize/2;
	float *mask=fft+framesize/2;

	/* floor psychoacoustics */
	_vp_compute_mask(&p_look,
			 pg_look,
			 i,
			 fft,
			 logmdct,
			 mask,
			 ampmax,
			 local_ampmax[i],
			 framesize/2);

	analysis("mask",frameno+i,mask,framesize/2,1,0);

	{
	  vorbis_block vb;
	  vorbis_dsp_state vd;
	  memset(&vd,0,sizeof(vd));
	  vd.vi=&vi;
	  vb.vd=&vd;
	  vb.pcmend=framesize;

	  /* floor quantization/application */
	  nonzero[i]=_floor_P[1]->forward(&vb,floor_look,
					  mdct,
					  logmdct,
					  mask,
					  logmax,
					  
					  flr[i]);
	}

	_vp_remove_floor(&p_look,
			 pg_look,
			 logmdct,
			 mdct,
			 flr[i],
			 pcm[i],
			 local_ampmax[i]);

	for(j=0;j<framesize/2;j++)
	  if(fabs(pcm[i][j])>1500)
	    fprintf(stderr,"%ld ",frameno+i);
	
	analysis("res",frameno+i,pcm[i],framesize/2,1,0);
	analysis("codedflr",frameno+i,flr[i],framesize/2,1,1);
      }

      /* residue prequantization */
      _vp_partition_prequant(&p_look,
			     &vi,
			     pcm,
			     nonzero);
	
      for(i=0;i<2;i++)
	analysis("quant",frameno+i,pcm[i],framesize/2,1,0);

      /* channel coupling / stereo quantization */

      _vp_couple(&p_look,
		 &mapping_info,
		 pcm,
		 nonzero);
  
      for(i=0;i<2;i++)
	analysis("coupled",frameno+i,pcm[i],framesize/2,1,0);

      /* decoupling */
      for(i=mapping_info.coupling_steps-1;i>=0;i--){
	float *pcmM=pcm[mapping_info.coupling_mag[i]];
	float *pcmA=pcm[mapping_info.coupling_ang[i]];
	
	for(j=0;j<framesize/2;j++){
	  float mag=pcmM[j];
	  float ang=pcmA[j];
	  
	  if(mag>0)
	    if(ang>0){
	      pcmM[j]=mag;
	      pcmA[j]=mag-ang;
	    }else{
	      pcmA[j]=mag;
	      pcmM[j]=mag+ang;
	    }
	  else
	    if(ang>0){
	      pcmM[j]=mag;
	      pcmA[j]=mag+ang;
	    }else{
	      pcmA[j]=mag;
	      pcmM[j]=mag-ang;
	    }
	}
      }
    
      for(i=0;i<2;i++)
	analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0);

      for(i=0;i<2;i++){
	float amp;

	for(j=0;j<framesize/2;j++)
	  pcm[i][j]*=flr[i][j];

	analysis("final",frameno+i,pcm[i],framesize/2,1,1);

	/* take it back to time */
	mdct_backward(&m_look,pcm[i],pcm[i]);

	for(j=0;j<framesize/2;j++)
	  out[i][j]+=pcm[i][j]*window[j];

	analysis("out",frameno+i,out[i],framesize/2,0,0);


      }
           
      /* write data.  Use the part of buffer we're about to shift out */
      for(i=0;i<2;i++){
	char  *ptr=buffer+i*2;
	float *mono=out[i];
	int flag=0;
	for(j=0;j<framesize/2;j++){
	  int val=mono[j]*32767.;
	  /* might as well guard against clipping */
	  if(val>32767){
	    if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
	    flag=1;
	    val=32767;
	  }
	  if(val<-32768){
	    if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
	    flag=1;
	    val=-32768;
	  }
	  ptr[0]=val&0xff;
	  ptr[1]=(val>>8)&0xff;
	  ptr+=4;
	}
      }
 
      fprintf(stderr,"*");
      fwrite(buffer,1,framesize*2,stdout);
      memmove(buffer,buffer2,framesize*2);

      for(i=0;i<2;i++){
	for(j=0,k=framesize/2;j<framesize/2;j++,k++)
	  out[i][j]=pcm[i][k]*window[k];
      }
      frameno+=2;
    }else
Example #2
0
static int _vds_shared_init(vorbis_dsp_state *v,vorbis_info *vi,int encp){
  int i;
  codec_setup_info *ci=vi->codec_setup;
  private_state *b=NULL;
  int hs;

  if(ci==NULL) return 1;
  hs=ci->halfrate_flag;

  memset(v,0,sizeof(*v));
  b=v->backend_state=_ogg_calloc(1,sizeof(*b));

  v->vi=vi;
  b->modebits=ilog2(ci->modes);

  b->transform[0]=_ogg_calloc(VI_TRANSFORMB,sizeof(*b->transform[0]));
  b->transform[1]=_ogg_calloc(VI_TRANSFORMB,sizeof(*b->transform[1]));

  /* MDCT is tranform 0 */

  b->transform[0][0]=_ogg_calloc(1,sizeof(mdct_lookup));
  b->transform[1][0]=_ogg_calloc(1,sizeof(mdct_lookup));
  mdct_init(b->transform[0][0],ci->blocksizes[0]>>hs);
  mdct_init(b->transform[1][0],ci->blocksizes[1]>>hs);

  /* Vorbis I uses only window type 0 */
  b->window[0]=ilog2(ci->blocksizes[0])-6;
  b->window[1]=ilog2(ci->blocksizes[1])-6;

  if(encp){ /* encode/decode differ here */

    /* analysis always needs an fft */
    drft_init(&b->fft_look[0],ci->blocksizes[0]);
    drft_init(&b->fft_look[1],ci->blocksizes[1]);

    /* finish the codebooks */
    if(!ci->fullbooks){
      ci->fullbooks=_ogg_calloc(ci->books,sizeof(*ci->fullbooks));
      for(i=0;i<ci->books;i++)
        vorbis_book_init_encode(ci->fullbooks+i,ci->book_param[i]);
    }

    b->psy=_ogg_calloc(ci->psys,sizeof(*b->psy));
    for(i=0;i<ci->psys;i++){
      _vp_psy_init(b->psy+i,
                   ci->psy_param[i],
                   &ci->psy_g_param,
                   ci->blocksizes[ci->psy_param[i]->blockflag]/2,
                   vi->rate);
    }

    v->analysisp=1;
  }else{
    /* finish the codebooks */
    if(!ci->fullbooks){
      ci->fullbooks=_ogg_calloc(ci->books,sizeof(*ci->fullbooks));
      for(i=0;i<ci->books;i++){
        if(ci->book_param[i]==NULL)
          goto abort_books;
        if(vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i]))
          goto abort_books;
        /* decode codebooks are now standalone after init */
        vorbis_staticbook_destroy(ci->book_param[i]);
        ci->book_param[i]=NULL;
      }
    }
  }

  /* initialize the storage vectors. blocksize[1] is small for encode,
     but the correct size for decode */
  v->pcm_storage=ci->blocksizes[1];
  v->pcm=_ogg_malloc(vi->channels*sizeof(*v->pcm));
  v->pcmret=_ogg_malloc(vi->channels*sizeof(*v->pcmret));
  {
    int i;
    for(i=0;i<vi->channels;i++)
      v->pcm[i]=_ogg_calloc(v->pcm_storage,sizeof(*v->pcm[i]));
  }

  /* all 1 (large block) or 0 (small block) */
  /* explicitly set for the sake of clarity */
  v->lW=0; /* previous window size */
  v->W=0;  /* current window size */

  /* all vector indexes */
  v->centerW=ci->blocksizes[1]/2;

  v->pcm_current=v->centerW;

  /* initialize all the backend lookups */
  b->flr=_ogg_calloc(ci->floors,sizeof(*b->flr));
  b->residue=_ogg_calloc(ci->residues,sizeof(*b->residue));

  for(i=0;i<ci->floors;i++)
    b->flr[i]=_floor_P[ci->floor_type[i]]->
      look(v,ci->floor_param[i]);

  for(i=0;i<ci->residues;i++)
    b->residue[i]=_residue_P[ci->residue_type[i]]->
      look(v,ci->residue_param[i]);

  return 0;
 abort_books:
  for(i=0;i<ci->books;i++){
    if(ci->book_param[i]!=NULL){
      vorbis_staticbook_destroy(ci->book_param[i]);
      ci->book_param[i]=NULL;
    }
  }
  vorbis_dsp_clear(v);
  return -1;
}
Example #3
0
static vorbis_look_mapping *mapping0_look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
			  vorbis_info_mapping *m){
  int i;
  vorbis_info          *vi=vd->vi;
  codec_setup_info     *ci=vi->codec_setup;
  vorbis_look_mapping0 *look=_ogg_calloc(1,sizeof(vorbis_look_mapping0));
  vorbis_info_mapping0 *info=look->map=(vorbis_info_mapping0 *)m;
  look->mode=vm;
  
  look->time_look=_ogg_calloc(info->submaps,sizeof(vorbis_look_time *));
  look->floor_look=_ogg_calloc(info->submaps,sizeof(vorbis_look_floor *));

  look->residue_look=_ogg_calloc(info->submaps,sizeof(vorbis_look_residue *));

  look->time_func=_ogg_calloc(info->submaps,sizeof(vorbis_func_time *));
  look->floor_func=_ogg_calloc(info->submaps,sizeof(vorbis_func_floor *));
  look->residue_func=_ogg_calloc(info->submaps,sizeof(vorbis_func_residue *));
  
  for(i=0;i<info->submaps;i++){
    int timenum=info->timesubmap[i];
    int floornum=info->floorsubmap[i];
    int resnum=info->residuesubmap[i];

    look->time_func[i]=_time_P[ci->time_type[timenum]];
    look->time_look[i]=look->time_func[i]->
      look(vd,vm,ci->time_param[timenum]);
    look->floor_func[i]=_floor_P[ci->floor_type[floornum]];
    look->floor_look[i]=look->floor_func[i]->
      look(vd,vm,ci->floor_param[floornum]);
    look->residue_func[i]=_residue_P[ci->residue_type[resnum]];
    look->residue_look[i]=look->residue_func[i]->
      look(vd,vm,ci->residue_param[resnum]);
    
  }
  if(ci->psys && vd->analysisp){
    if(info->psy[0] != info->psy[1]){

      int psynum=info->psy[0];
      look->psy_look[0]=_ogg_calloc(1,sizeof(vorbis_look_psy));      
      _vp_psy_init(look->psy_look[0],ci->psy_param[psynum],
		   ci->psy_g_param,
		   ci->blocksizes[vm->blockflag]/2,vi->rate);

      psynum=info->psy[1];
      look->psy_look[1]=_ogg_calloc(1,sizeof(vorbis_look_psy));      
      _vp_psy_init(look->psy_look[1],ci->psy_param[psynum],
		   ci->psy_g_param,
		   ci->blocksizes[vm->blockflag]/2,vi->rate);
    }else{

      int psynum=info->psy[0];
      look->psy_look[0]=_ogg_calloc(1,sizeof(vorbis_look_psy));      
      look->psy_look[1]=look->psy_look[0];
      _vp_psy_init(look->psy_look[0],ci->psy_param[psynum],
		   ci->psy_g_param,
		   ci->blocksizes[vm->blockflag]/2,vi->rate);

    }
  }

  look->ch=vi->channels;

  if(vd->analysisp)drft_init(&look->fft_look,ci->blocksizes[vm->blockflag]);
  return(look);
}