208 int vorbis_dsp_synthesis(vorbis_dsp_state *vd,ogg_packet *op,int decodep){  in vorbis_dsp_synthesis()  argument
209   vorbis_info          *vi=vd->vi;  in vorbis_dsp_synthesis()
213   oggpack_readinit(&vd->opb,op->packet);  in vorbis_dsp_synthesis()
216   if(oggpack_read(&vd->opb,1)!=0){  in vorbis_dsp_synthesis()
222   mode=oggpack_read(&vd->opb,ilog(ci->modes));  in vorbis_dsp_synthesis()
226   vd->lW=vd->W;  in vorbis_dsp_synthesis()
227   vd->W=ci->mode_param[mode].blockflag;  in vorbis_dsp_synthesis()
229     mdct_shift_right(ci->blocksizes[vd->lW],vd->work[i],vd->mdctright[i]);  in vorbis_dsp_synthesis()
231   if(vd->W){  in vorbis_dsp_synthesis()
233     oggpack_read(&vd->opb,1);  in vorbis_dsp_synthesis()
234     temp=oggpack_read(&vd->opb,1);  in vorbis_dsp_synthesis()
240     mapping_inverse(vd,ci->map_param+ci->mode_param[mode].mapping);  in vorbis_dsp_synthesis()
242     if(vd->out_begin==-1){  in vorbis_dsp_synthesis()
243       vd->out_begin=0;  in vorbis_dsp_synthesis()
244       vd->out_end=0;  in vorbis_dsp_synthesis()
246       vd->out_begin=0;  in vorbis_dsp_synthesis()
247       vd->out_end=ci->blocksizes[vd->lW]/4+ci->blocksizes[vd->W]/4;  in vorbis_dsp_synthesis()
261   if(vd->sequence==-1 || vd->sequence+1 != op->packetno-3){  in vorbis_dsp_synthesis()
263     vd->granulepos=-1;  in vorbis_dsp_synthesis()
264     vd->sample_count=-1;  in vorbis_dsp_synthesis()
267   vd->sequence=op->packetno;  in vorbis_dsp_synthesis()
268   vd->sequence=vd->sequence-3;  in vorbis_dsp_synthesis()
270   if(vd->sample_count==-1){  in vorbis_dsp_synthesis()
271     vd->sample_count=0;  in vorbis_dsp_synthesis()
273     vd->sample_count+=  in vorbis_dsp_synthesis()
274       ci->blocksizes[vd->lW]/4+ci->blocksizes[vd->W]/4;  in vorbis_dsp_synthesis()
277   if(vd->granulepos==-1){  in vorbis_dsp_synthesis()
281       vd->granulepos=op->granulepos;  in vorbis_dsp_synthesis()
284       if(vd->sample_count>vd->granulepos){  in vorbis_dsp_synthesis()
294 	  vd->out_end-=(int)(vd->sample_count-vd->granulepos);  in vorbis_dsp_synthesis()
297 	  vd->out_begin+=(int)(vd->sample_count-vd->granulepos);  in vorbis_dsp_synthesis()
298 	  if(vd->out_begin>vd->out_end)  in vorbis_dsp_synthesis()
299 	    vd->out_begin=vd->out_end;  in vorbis_dsp_synthesis()
306     vd->granulepos+=  in vorbis_dsp_synthesis()
307       ci->blocksizes[vd->lW]/4+ci->blocksizes[vd->W]/4;  in vorbis_dsp_synthesis()
308     if(op->granulepos!=-1 && vd->granulepos!=op->granulepos){  in vorbis_dsp_synthesis()
310       if(vd->granulepos>op->granulepos){  in vorbis_dsp_synthesis()
311 	long extra=(long)(vd->granulepos-op->granulepos);  in vorbis_dsp_synthesis()
316 	    vd->out_end-=extra;  in vorbis_dsp_synthesis()
321       vd->granulepos=op->granulepos;  in vorbis_dsp_synthesis()