/********************************************************************
* *
- * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
- * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
- * PLEASE READ THESE TERMS DISTRIBUTING. *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
- * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
- * by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
- * http://www.xiph.org/ *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
+ * by the XIPHOPHORUS Company http://www.xiph.org/ *
* *
********************************************************************
- function: residue backend 0 implementation
- last mod: $Id: res0.c,v 1.5 2000/02/12 08:33:09 xiphmont Exp $
+ function: residue backend 0, 1 and 2 implementation
+ last mod: $Id: res0.c,v 1.39 2001/12/16 04:15:47 xiphmont Exp $
********************************************************************/
+/* Slow, slow, slow, simpleminded and did I mention it was slow? The
+ encode/decode loops are coded for clarity and performance is not
+ yet even a nagging little idea lurking in the shadows. Oh and BTW,
+ it's slow. */
+
#include <stdlib.h>
#include <string.h>
#include <math.h>
-#include <stdio.h>
+#include <ogg/ogg.h>
#include "vorbis/codec.h"
-#include "bitwise.h"
+#include "codec_internal.h"
#include "registry.h"
-#include "scales.h"
+#include "codebook.h"
+#include "misc.h"
+#include "os.h"
+
+#ifdef TRAIN_RES
+#include <stdio.h>
+#endif
typedef struct {
vorbis_info_residue0 *info;
- int bookpointers[64];
+ int map;
+
+ int parts;
+ int stages;
+ codebook *fullbooks;
+ codebook *phrasebook;
+ codebook ***partbooks;
+
+ int partvals;
+ int **decodemap;
+
+ long postbits;
+ long phrasebits;
+ long frames;
+
+ int qoffsets[BITTRACK_DIVISOR+1];
+
+#ifdef TRAIN_RES
+ long *training_data[8][64];
+ int longp;
+ double tmin;
+ double tmax;
+#endif
+
} vorbis_look_residue0;
-void free_info(vorbis_info_residue *i){
- if(i){
- memset(i,0,sizeof(vorbis_info_residue0));
- free(i);
+vorbis_info_residue *res0_copy_info(vorbis_info_residue *vr){
+ vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
+ vorbis_info_residue0 *ret=_ogg_malloc(sizeof(*ret));
+ memcpy(ret,info,sizeof(*ret));
+ return(ret);
+}
+
+void res0_free_info(vorbis_info_residue *i){
+ vorbis_info_residue0 *info=(vorbis_info_residue0 *)i;
+ if(info){
+ memset(info,0,sizeof(*info));
+ _ogg_free(info);
}
}
-void free_look(vorbis_look_residue *i){
+void res0_free_look(vorbis_look_residue *i){
+ int j;
if(i){
- memset(i,0,sizeof(vorbis_look_residue0));
- free(i);
+
+ vorbis_look_residue0 *look=(vorbis_look_residue0 *)i;
+
+#ifdef TRAIN_RES
+ {
+ int j,k,l;
+ for(j=0;j<look->parts;j++){
+ for(k=0;k<8;k++)
+ if(look->training_data[k][j]){
+ char buffer[80];
+ FILE *of;
+ codebook *statebook=look->partbooks[j][k];
+
+ /* long and short into the same bucket by current convention */
+ sprintf(buffer,"res_part%d_pass%d.vqd",j,k);
+ of=fopen(buffer,"a");
+
+ for(l=0;l<statebook->entries;l++)
+ fprintf(of,"%d:%ld\n",l,look->training_data[k][j][l]);
+
+ fclose(of);
+
+ _ogg_free(look->training_data[k][j]);
+ }
+ }
+ }
+ fprintf(stderr,"min/max residue: %g::%g\n",look->tmin,look->tmax);
+
+ fprintf(stderr,"residue bit usage %f:%f (%f total)\n",
+ (float)look->phrasebits/look->frames,
+ (float)look->postbits/look->frames,
+ (float)(look->postbits+look->phrasebits)/look->frames);
+#endif
+
+
+ /*vorbis_info_residue0 *info=look->info;
+
+ fprintf(stderr,
+ "%ld frames encoded in %ld phrasebits and %ld residue bits "
+ "(%g/frame) \n",look->frames,look->phrasebits,
+ look->resbitsflat,
+ (look->phrasebits+look->resbitsflat)/(float)look->frames);
+
+ for(j=0;j<look->parts;j++){
+ long acc=0;
+ fprintf(stderr,"\t[%d] == ",j);
+ for(k=0;k<look->stages;k++)
+ if((info->secondstages[j]>>k)&1){
+ fprintf(stderr,"%ld,",look->resbits[j][k]);
+ acc+=look->resbits[j][k];
+ }
+
+ fprintf(stderr,":: (%ld vals) %1.2fbits/sample\n",look->resvals[j],
+ acc?(float)acc/(look->resvals[j]*info->grouping):0);
+ }
+ fprintf(stderr,"\n");*/
+
+ for(j=0;j<look->parts;j++)
+ if(look->partbooks[j])_ogg_free(look->partbooks[j]);
+ _ogg_free(look->partbooks);
+ for(j=0;j<look->partvals;j++)
+ _ogg_free(look->decodemap[j]);
+ _ogg_free(look->decodemap);
+
+ memset(look,0,sizeof(*look));
+ _ogg_free(look);
+ }
+}
+
+static int ilog(unsigned int v){
+ int ret=0;
+ while(v){
+ ret++;
+ v>>=1;
+ }
+ return(ret);
+}
+
+static int icount(unsigned int v){
+ int ret=0;
+ while(v){
+ ret+=v&1;
+ v>>=1;
}
+ return(ret);
}
-/* not yet */
-void pack(vorbis_info_residue *vr,oggpack_buffer *opb){
+
+void res0_pack(vorbis_info_residue *vr,oggpack_buffer *opb){
vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
int j,acc=0;
- _oggpack_write(opb,info->begin,24);
- _oggpack_write(opb,info->end,24);
+ oggpack_write(opb,info->begin,24);
+ oggpack_write(opb,info->end,24);
- _oggpack_write(opb,info->grouping-1,24); /* residue vectors to group and
+ oggpack_write(opb,info->grouping-1,24); /* residue vectors to group and
code with a partitioned book */
- _oggpack_write(opb,info->partitions-1,6); /* possible partition choices */
- _oggpack_write(opb,info->groupspercode-1,6); /* partitioned group
- codes to encode at
- once */
- _oggpack_write(opb,info->groupbook,8); /* group huffman book */
+ oggpack_write(opb,info->partitions-1,6); /* possible partition choices */
+ oggpack_write(opb,info->groupbook,8); /* group huffman book */
+
+ /* secondstages is a bitmask; as encoding progresses pass by pass, a
+ bitmask of one indicates this partition class has bits to write
+ this pass */
for(j=0;j<info->partitions;j++){
- _oggpack_write(opb,info->secondstages[j],4); /* zero *is* a valid choice */
- acc+=info->secondstages[j];
+ if(ilog(info->secondstages[j])>3){
+ /* yes, this is a minor hack due to not thinking ahead */
+ oggpack_write(opb,info->secondstages[j],3);
+ oggpack_write(opb,1,1);
+ oggpack_write(opb,info->secondstages[j]>>3,5);
+ }else
+ oggpack_write(opb,info->secondstages[j],4); /* trailing zero */
+ acc+=icount(info->secondstages[j]);
}
for(j=0;j<acc;j++)
- _oggpack_write(opb,info->booklist[j],8);
+ oggpack_write(opb,info->booklist[j],8);
}
/* vorbis_info is for range checking */
-vorbis_info_residue *unpack(vorbis_info *vi,oggpack_buffer *opb){
+vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){
int j,acc=0;
- vorbis_info_residue0 *ret=calloc(1,sizeof(vorbis_info_residue0));
-
- ret->begin=_oggpack_read(opb,24);
- ret->end=_oggpack_read(opb,24);
- ret->grouping=_oggpack_read(opb,24)+1;
- ret->partitions=_oggpack_read(opb,6)+1;
- ret->groupspercode=_oggpack_read(opb,6)+1;
- ret->groupbook=_oggpack_read(opb,8);
- for(j=0;j<ret->partitions;j++)
- acc+=ret->secondstages[j]=_oggpack_read(opb,4);
+ vorbis_info_residue0 *info=_ogg_calloc(1,sizeof(*info));
+ codec_setup_info *ci=vi->codec_setup;
+
+ info->begin=oggpack_read(opb,24);
+ info->end=oggpack_read(opb,24);
+ info->grouping=oggpack_read(opb,24)+1;
+ info->partitions=oggpack_read(opb,6)+1;
+ info->groupbook=oggpack_read(opb,8);
+
+ for(j=0;j<info->partitions;j++){
+ int cascade=oggpack_read(opb,3);
+ if(oggpack_read(opb,1))
+ cascade|=(oggpack_read(opb,5)<<3);
+ info->secondstages[j]=cascade;
+
+ acc+=icount(cascade);
+ }
for(j=0;j<acc;j++)
- ret->booklist[j]=_oggpack_read(opb,8);
+ info->booklist[j]=oggpack_read(opb,8);
- if(ret->groupbook>=vi->books)goto errout;
+ if(info->groupbook>=ci->books)goto errout;
for(j=0;j<acc;j++)
- if(ret->booklist[j]>=vi->books)goto errout;
+ if(info->booklist[j]>=ci->books)goto errout;
- return(ret);
+ return(info);
errout:
- free_info(ret);
+ res0_free_info(info);
return(NULL);
}
-vorbis_look_residue *look (vorbis_info *vi,vorbis_info_mode *vm,
+vorbis_look_residue *res0_look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
vorbis_info_residue *vr){
vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
- vorbis_look_residue0 *look=calloc(1,sizeof(vorbis_look_residue0));
- int j,acc=0;
+ vorbis_look_residue0 *look=_ogg_calloc(1,sizeof(*look));
+ backend_lookup_state *be=vd->backend_state;
+
+ int j,k,acc=0;
+ int dim;
+ int maxstage=0;
look->info=info;
- for(j=0;j<info->partitions;j++){
- look->bookpointers[j]=acc;
- acc+=info->secondstages[j];
+ look->map=vm->mapping;
+
+ look->parts=info->partitions;
+ look->fullbooks=be->fullbooks;
+ look->phrasebook=be->fullbooks+info->groupbook;
+ dim=look->phrasebook->dim;
+
+ look->partbooks=_ogg_calloc(look->parts,sizeof(*look->partbooks));
+
+ for(j=0;j<look->parts;j++){
+ int stages=ilog(info->secondstages[j]);
+ if(stages){
+ if(stages>maxstage)maxstage=stages;
+ look->partbooks[j]=_ogg_calloc(stages,sizeof(*look->partbooks[j]));
+ for(k=0;k<stages;k++)
+ if(info->secondstages[j]&(1<<k)){
+ look->partbooks[j][k]=be->fullbooks+info->booklist[acc++];
+#ifdef TRAIN_RES
+ look->training_data[k][j]=calloc(look->partbooks[j][k]->entries,
+ sizeof(***look->training_data));
+#endif
+ }
+ }
+ }
+
+ look->partvals=rint(pow(look->parts,dim));
+ look->stages=maxstage;
+ look->decodemap=_ogg_malloc(look->partvals*sizeof(*look->decodemap));
+ for(j=0;j<look->partvals;j++){
+ long val=j;
+ long mult=look->partvals/look->parts;
+ look->decodemap[j]=_ogg_malloc(dim*sizeof(*look->decodemap[j]));
+ for(k=0;k<dim;k++){
+ long deco=val/mult;
+ val-=deco*mult;
+ mult/=look->parts;
+ look->decodemap[j][k]=deco;
+ }
+ }
+
+ {
+ int samples_per_partition=info->grouping;
+ int n=info->end-info->begin,i;
+ int partvals=n/samples_per_partition;
+
+ for(i=0;i<BITTRACK_DIVISOR;i++)
+ look->qoffsets[i]=partvals*(i+1)/BITTRACK_DIVISOR;
+
+ look->qoffsets[i]=9999999;
}
return(look);
}
-int forward(vorbis_block *vb,vorbis_look_residue *l,
- double **in,int ch){
+
+/* does not guard against invalid settings; eg, a subn of 16 and a
+ subgroup request of 32. Max subn of 128 */
+static int _interleaved_testhack(float *vec,int n,vorbis_look_residue0 *look,
+ int auxparts,int auxpartnum){
+ vorbis_info_residue0 *info=look->info;
+ int i,j=0;
+ float max,localmax=0.f;
+ float temp[128];
+ float entropy[8];
+
+ /* setup */
+ for(i=0;i<n;i++)temp[i]=fabs(vec[i]);
+
+ /* handle case subgrp==1 outside */
+ for(i=0;i<n;i++)
+ if(temp[i]>localmax)localmax=temp[i];
+ max=localmax;
+
+ for(i=0;i<n;i++)temp[i]=rint(temp[i]);
+
+ while(1){
+ entropy[j]=localmax;
+ n>>=1;
+ if(!n)break;
+ j++;
+
+ for(i=0;i<n;i++){
+ temp[i]+=temp[i+n];
+ }
+ localmax=0.f;
+ for(i=0;i<n;i++)
+ if(temp[i]>localmax)localmax=temp[i];
+ }
+
+ for(i=0;i<auxparts-1;i++)
+ if(auxpartnum<info->blimit[i] &&
+ entropy[info->subgrp[i]]<=info->entmax[i] &&
+ max<=info->ampmax[i])
+ break;
+
+ return(i);
+}
+
+static int _testhack(float *vec,int n,vorbis_look_residue0 *look,
+ int auxparts,int auxpartnum){
+ vorbis_info_residue0 *info=look->info;
+ int i;
+ float max=0.f;
+ float temp[128];
+ float entropy=0.f;
+
+ /* setup */
+ for(i=0;i<n;i++)temp[i]=fabs(vec[i]);
+
+ for(i=0;i<n;i++)
+ if(temp[i]>max)max=temp[i];
+
+ for(i=0;i<n;i++)temp[i]=rint(temp[i]);
+
+ for(i=0;i<n;i++)
+ entropy+=temp[i];
+
+ for(i=0;i<auxparts-1;i++)
+ if(auxpartnum<info->blimit[i] &&
+ entropy<=info->entmax[i] &&
+ max<=info->ampmax[i])
+ break;
+
+ return(i);
+}
+
+static int _interleaved_encodepart(oggpack_buffer *opb,float *vec, int n,
+ codebook *book,vorbis_look_residue0 *look,
+ long *acc){
+ int i,bits=0;
+ int dim=book->dim;
+ int step=n/dim;
+
+ for(i=0;i<step;i++){
+ int entry=vorbis_book_besterror(book,vec+i,step,0);
+
+#ifdef TRAIN_RES
+ acc[entry]++;
+#endif
+
+ bits+=vorbis_book_encode(book,entry,opb);
+ }
+
+ return(bits);
+}
+
+static int _encodepart(oggpack_buffer *opb,float *vec, int n,
+ codebook *book,vorbis_look_residue0 *look,
+ long *acc){
+ int i,bits=0;
+ int dim=book->dim;
+ int step=n/dim;
+
+ for(i=0;i<step;i++){
+ int entry=vorbis_book_besterror(book,vec+i*dim,1,0);
+
+#ifdef TRAIN_RES
+ acc[entry]++;
+#endif
+
+ bits+=vorbis_book_encode(book,entry,opb);
+ }
+
+ return(bits);
+}
+
+static long **_01class(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int ch,
+ int (*classify)(float *,int,vorbis_look_residue0 *,
+ int,int)){
long i,j;
- vorbis_look_residue0 *look=(vorbis_look_residue0 *)l;
+ vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
+ vorbis_info_residue0 *info=look->info;
+
+ /* move all this setup out later */
+ int samples_per_partition=info->grouping;
+ int possible_partitions=info->partitions;
+ int n=info->end-info->begin;
+
+ int partvals=n/samples_per_partition;
+ long **partword=_vorbis_block_alloc(vb,ch*sizeof(*partword));
+
+ /* we find the partition type for each partition of each
+ channel. We'll go back and do the interleaved encoding in a
+ bit. For now, clarity */
+
+ for(i=0;i<ch;i++){
+ partword[i]=_vorbis_block_alloc(vb,n/samples_per_partition*sizeof(*partword[i]));
+ memset(partword[i],0,n/samples_per_partition*sizeof(*partword[i]));
+ }
+
+ for(i=0;i<partvals;i++){
+ for(j=0;j<ch;j++)
+ /* do the partition decision based on the 'entropy'
+ int the block */
+ partword[j][i]=
+ classify(in[j]+i*samples_per_partition+info->begin,
+ samples_per_partition,look,possible_partitions,i);
+
+ }
+
+#ifdef TRAIN_RES
+ look->longp=vb->W;
+ {
+ FILE *of;
+ char buffer[80];
+
+ for(i=0;i<ch;i++){
+ sprintf(buffer,"resaux_%s.vqd",(vb->mode?"long":"short"));
+ of=fopen(buffer,"a");
+ for(j=0;j<partvals;j++)
+ fprintf(of,"%ld, ",partword[i][j]);
+ fprintf(of,"\n");
+ fclose(of);
+ }
+ }
+#endif
+ look->frames++;
+
+ return(partword);
+}
+
+static long **_2class(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int ch,
+ int (*classify)(float *,int,vorbis_look_residue0 *,
+ int,int)){
+ long i,j,k,l;
+ vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
vorbis_info_residue0 *info=look->info;
+
+ /* move all this setup out later */
+ int samples_per_partition=info->grouping;
+ int possible_partitions=info->partitions;
+ int n=info->end-info->begin;
+
+ int partvals=n/samples_per_partition;
+ long **partword=_vorbis_block_alloc(vb,sizeof(*partword));
+ float *work=alloca(sizeof(*work)*samples_per_partition);
+
+#ifdef TRAIN_RES
+ FILE *of;
+ char buffer[80];
+#endif
+
+ partword[0]=_vorbis_block_alloc(vb,n*ch/samples_per_partition*sizeof(*partword[0]));
+ memset(partword[0],0,n*ch/samples_per_partition*sizeof(*partword[0]));
+
+ for(i=0,j=0,k=0,l=info->begin;i<partvals;i++){
+ for(k=0;k<samples_per_partition;k++){
+ work[k]=in[j][l];
+ j++;
+ if(j>=ch){
+ j=0;
+ l++;
+ }
+ }
+
+ partword[0][i]=
+ classify(work,samples_per_partition,look,possible_partitions,i);
+
+
+ }
+
+#ifdef TRAIN_RES
+ look->longp=vb->W;
+ sprintf(buffer,"resaux_%s.vqd",(vb->mode?"long":"short"));
+ of=fopen(buffer,"a");
+ for(i=0;i<partvals;i++)
+ fprintf(of,"%ld, ",partword[0][i]);
+ fprintf(of,"\n");
+ fclose(of);
+#endif
+
+ look->frames++;
+
+ return(partword);
+}
+
+static int _01forward(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int ch,
+ int pass,long **partword,
+ int (*encode)(oggpack_buffer *,float *,int,
+ codebook *,vorbis_look_residue0 *,long *),
+ ogg_uint32_t *stats){
+ long i,j,k,s;
+ vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
+ vorbis_info_residue0 *info=look->info;
+
+ vorbis_dsp_state *vd=vb->vd;
+ vorbis_info *vi=vd->vi;
+ codec_setup_info *ci=vi->codec_setup;
+
+
+ /* move all this setup out later */
+ int samples_per_partition=info->grouping;
+ int possible_partitions=info->partitions;
+ int partitions_per_word=look->phrasebook->dim;
+ int n=info->end-info->begin;
+
+ int partvals=n/samples_per_partition;
+ long resbits[128];
+ long resvals[128];
+
+#ifdef TRAIN_RES
for(i=0;i<ch;i++)
- for(j=0;j<vb->pcmend/2;j++)
- _oggpack_write(&vb->opb,rint(in[i][j])+16,5);
+ for(j=info->begin;j<info->end;j++){
+ if(in[i][j]>look->tmax)look->tmax=in[i][j];
+ if(in[i][j]<look->tmin)look->tmin=in[i][j];
+ }
+#endif
+
+ memset(resbits,0,sizeof(resbits));
+ memset(resvals,0,sizeof(resvals));
+
+ /* we code the partition words for each channel, then the residual
+ words for a partition per channel until we've written all the
+ residual words for that partition word. Then write the next
+ partition channel words... */
+
+ for(s=(pass==0?0:ci->passlimit[pass-1]);s<ci->passlimit[pass];s++){
+ int bin=0;
+ ogg_uint32_t *qptr=NULL;
+ if(stats)qptr=stats+s*BITTRACK_DIVISOR;
+
+ for(i=0;i<partvals;){
+
+ /* first we encode a partition codeword for each channel */
+ if(s==0){
+ for(j=0;j<ch;j++){
+ long val=partword[j][i];
+ long ret;
+ for(k=1;k<partitions_per_word;k++){
+ val*=possible_partitions;
+ if(i+k<partvals)
+ val+=partword[j][i+k];
+ }
+
+ /* training hack */
+ if(val<look->phrasebook->entries)
+ ret=vorbis_book_encode(look->phrasebook,val,&vb->opb);
+#ifdef TRAIN_RES
+ else
+ fprintf(stderr,"!");
+#endif
+ look->phrasebits+=ret;
+
+ }
+ }
+
+ /* now we encode interleaved residual values for the partitions */
+ for(k=0;k<partitions_per_word && i<partvals;k++,i++){
+ long offset=i*samples_per_partition+info->begin;
+
+ if(qptr)while(i>=look->qoffsets[bin])
+ qptr[bin++]=oggpack_bits(&vb->opb);
+
+ for(j=0;j<ch;j++){
+ if(s==0)resvals[partword[j][i]]+=samples_per_partition;
+ if(info->secondstages[partword[j][i]]&(1<<s)){
+ codebook *statebook=look->partbooks[partword[j][i]][s];
+ if(statebook){
+ int fn=-1;
+ int ret;
+ long *accumulator=NULL;
+
+#ifdef TRAIN_RES
+ accumulator=look->training_data[s][partword[j][i]];
+#endif
+
+ ret=encode(&vb->opb,in[j]+offset,samples_per_partition,
+ statebook,look,accumulator);
+
+ look->postbits+=ret;
+ resbits[partword[j][i]]+=ret;
+ }
+ }
+ }
+ }
+ if(qptr)while(i>=look->qoffsets[bin])
+ qptr[bin++]=oggpack_bits(&vb->opb);
+ }
+ }
+
+ /*{
+ long total=0;
+ long totalbits=0;
+ fprintf(stderr,"%d :: ",vb->mode);
+ for(k=0;k<possible_partitions;k++){
+ fprintf(stderr,"%ld/%1.2g, ",resvals[k],(float)resbits[k]/resvals[k]);
+ total+=resvals[k];
+ totalbits+=resbits[k];
+ }
+
+ fprintf(stderr,":: %ld:%1.2g\n",total,(double)totalbits/total);
+ }*/
return(0);
}
-int inverse(vorbis_block *vb,vorbis_look_residue *l,double **in,int ch){
- long i,j;
+/* a truncated packet here just means 'stop working'; it's not an error */
+static int _01inverse(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int ch,
+ long (*decodepart)(codebook *, float *,
+ oggpack_buffer *,int)){
+
+ long i,j,k,l,s;
+ vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
+ vorbis_info_residue0 *info=look->info;
+
+ /* move all this setup out later */
+ int samples_per_partition=info->grouping;
+ int partitions_per_word=look->phrasebook->dim;
+ int n=info->end-info->begin;
+
+ int partvals=n/samples_per_partition;
+ int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
+ int ***partword=alloca(ch*sizeof(*partword));
+
+ for(j=0;j<ch;j++)
+ partword[j]=_vorbis_block_alloc(vb,partwords*sizeof(*partword[j]));
+
+ for(s=0;s<look->stages;s++){
+
+ /* each loop decodes on partition codeword containing
+ partitions_pre_word partitions */
+ for(i=0,l=0;i<partvals;l++){
+ if(s==0){
+ /* fetch the partition word for each channel */
+ for(j=0;j<ch;j++){
+ int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
+ if(temp==-1)goto eopbreak;
+ partword[j][l]=look->decodemap[temp];
+ if(partword[j][l]==NULL)goto errout;
+ }
+ }
+
+ /* now we decode residual values for the partitions */
+ for(k=0;k<partitions_per_word && i<partvals;k++,i++)
+ for(j=0;j<ch;j++){
+ long offset=info->begin+i*samples_per_partition;
+ if(info->secondstages[partword[j][l][k]]&(1<<s)){
+ codebook *stagebook=look->partbooks[partword[j][l][k]][s];
+ if(stagebook){
+ if(decodepart(stagebook,in[j]+offset,&vb->opb,
+ samples_per_partition)==-1)goto eopbreak;
+ }
+ }
+ }
+ }
+ }
+
+ errout:
+ eopbreak:
+ return(0);
+}
+
+/* residue 0 and 1 are just slight variants of one another. 0 is
+ interleaved, 1 is not */
+long **res0_class(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int *nonzero,int ch){
+ /* we encode only the nonzero parts of a bundle */
+ int i,used=0;
+ for(i=0;i<ch;i++)
+ if(nonzero[i])
+ in[used++]=in[i];
+ if(used)
+ /*return(_01class(vb,vl,in,used,_interleaved_testhack));*/
+ return(_01class(vb,vl,in,used,_testhack));
+ else
+ return(0);
+}
+
+int res0_forward(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,float **out,int *nonzero,int ch,
+ int pass, long **partword,ogg_uint32_t *stats){
+ /* we encode only the nonzero parts of a bundle */
+ int i,j,used=0,n=vb->pcmend/2;
+ for(i=0;i<ch;i++)
+ if(nonzero[i]){
+ for(j=0;j<n;j++)
+ out[i][j]+=in[i][j];
+ in[used++]=in[i];
+ }
+ if(used){
+ int ret=_01forward(vb,vl,in,used,pass,partword,
+ _interleaved_encodepart,stats);
+ used=0;
+ for(i=0;i<ch;i++)
+ if(nonzero[i]){
+ for(j=0;j<n;j++)
+ out[i][j]-=in[used][j];
+ used++;
+ }
+ return(ret);
+ }else{
+ for(i=0;i<vorbis_bitrate_maxmarkers();i++)
+ stats[i]=oggpack_bits(&vb->opb);
+
+ return(0);
+ }
+}
+
+int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int *nonzero,int ch){
+ int i,used=0;
+ for(i=0;i<ch;i++)
+ if(nonzero[i])
+ in[used++]=in[i];
+ if(used)
+ return(_01inverse(vb,vl,in,used,vorbis_book_decodevs_add));
+ else
+ return(0);
+}
+
+int res1_forward(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,float **out,int *nonzero,int ch,
+ int pass, long **partword, ogg_uint32_t *stats){
+ int i,j,used=0,n=vb->pcmend/2;
for(i=0;i<ch;i++)
- for(j=0;j<vb->pcmend/2;j++)
- in[i][j]*=_oggpack_read(&vb->opb,5)-16;
+ if(nonzero[i]){
+ for(j=0;j<n;j++)
+ out[i][j]+=in[i][j];
+ in[used++]=in[i];
+ }
+
+ if(used){
+ int ret=_01forward(vb,vl,in,used,pass,partword,_encodepart,stats);
+ used=0;
+ for(i=0;i<ch;i++)
+ if(nonzero[i]){
+ for(j=0;j<n;j++)
+ out[i][j]-=in[used][j];
+ used++;
+ }
+ return(ret);
+ }else{
+ for(i=0;i<vorbis_bitrate_maxmarkers();i++)
+ stats[i]=oggpack_bits(&vb->opb);
+
+ return(0);
+ }
+}
+
+long **res1_class(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int *nonzero,int ch){
+ int i,used=0;
+ for(i=0;i<ch;i++)
+ if(nonzero[i])
+ in[used++]=in[i];
+ if(used)
+ return(_01class(vb,vl,in,used,_testhack));
+ else
+ return(0);
+}
+
+int res1_inverse(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int *nonzero,int ch){
+ int i,used=0;
+ for(i=0;i<ch;i++)
+ if(nonzero[i])
+ in[used++]=in[i];
+ if(used)
+ return(_01inverse(vb,vl,in,used,vorbis_book_decodev_add));
+ else
+ return(0);
+}
+
+long **res2_class(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int *nonzero,int ch){
+ int i,used=0;
+ for(i=0;i<ch;i++)
+ if(nonzero[i])
+ in[used++]=in[i];
+ if(used)
+ return(_2class(vb,vl,in,used,_testhack));
+ else
+ return(0);
+}
+
+/* res2 is slightly more different; all the channels are interleaved
+ into a single vector and encoded. */
+
+int res2_forward(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,float **out,int *nonzero,int ch,
+ int pass,long **partword,ogg_uint32_t *stats){
+ long i,j,k,n=vb->pcmend/2,used=0;
+
+ /* don't duplicate the code; use a working vector hack for now and
+ reshape ourselves into a single channel res1 */
+ /* ugly; reallocs for each coupling pass :-( */
+ float *work=_vorbis_block_alloc(vb,ch*n*sizeof(*work));
+ for(i=0;i<ch;i++){
+ float *pcm=in[i];
+ if(nonzero[i])used++;
+ for(j=0,k=i;j<n;j++,k+=ch)
+ work[k]=pcm[j];
+ }
+
+ if(used){
+ int ret=_01forward(vb,vl,&work,1,pass,partword,_encodepart,stats);
+ /* update the sofar vector */
+ for(i=0;i<ch;i++){
+ float *pcm=in[i];
+ float *sofar=out[i];
+ for(j=0,k=i;j<n;j++,k+=ch)
+ sofar[j]+=pcm[j]-work[k];
+
+ }
+ return(ret);
+ }else{
+ for(i=0;i<vorbis_bitrate_maxmarkers();i++)
+ stats[i]=oggpack_bits(&vb->opb);
+
+ return(0);
+ }
+}
+
+/* duplicate code here as speed is somewhat more important */
+int res2_inverse(vorbis_block *vb,vorbis_look_residue *vl,
+ float **in,int *nonzero,int ch){
+ long i,k,l,s;
+ vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
+ vorbis_info_residue0 *info=look->info;
+
+ /* move all this setup out later */
+ int samples_per_partition=info->grouping;
+ int partitions_per_word=look->phrasebook->dim;
+ int n=info->end-info->begin;
+
+ int partvals=n/samples_per_partition;
+ int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
+ int **partword=_vorbis_block_alloc(vb,partwords*sizeof(*partword));
+
+ for(i=0;i<ch;i++)if(nonzero[i])break;
+ if(i==ch)return(0); /* no nonzero vectors */
+
+ for(s=0;s<look->stages;s++){
+ for(i=0,l=0;i<partvals;l++){
+
+ if(s==0){
+ /* fetch the partition word */
+ int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
+ if(temp==-1)goto eopbreak;
+ partword[l]=look->decodemap[temp];
+ if(partword[l]==NULL)goto errout;
+ }
+
+ /* now we decode residual values for the partitions */
+ for(k=0;k<partitions_per_word && i<partvals;k++,i++)
+ if(info->secondstages[partword[l][k]]&(1<<s)){
+ codebook *stagebook=look->partbooks[partword[l][k]][s];
+
+ if(stagebook){
+ if(vorbis_book_decodevv_add(stagebook,in,
+ i*samples_per_partition+info->begin,ch,
+ &vb->opb,samples_per_partition)==-1)
+ goto eopbreak;
+ }
+ }
+ }
+ }
+
+ errout:
+ eopbreak:
return(0);
}
+
vorbis_func_residue residue0_exportbundle={
- &pack,
- &unpack,
- &look,
- &free_info,
- &free_look,
- &forward,
- &inverse
+ &res0_pack,
+ &res0_unpack,
+ &res0_look,
+ &res0_copy_info,
+ &res0_free_info,
+ &res0_free_look,
+ &res0_class,
+ &res0_forward,
+ &res0_inverse
+};
+
+vorbis_func_residue residue1_exportbundle={
+ &res0_pack,
+ &res0_unpack,
+ &res0_look,
+ &res0_copy_info,
+ &res0_free_info,
+ &res0_free_look,
+ &res1_class,
+ &res1_forward,
+ &res1_inverse
+};
+
+vorbis_func_residue residue2_exportbundle={
+ &res0_pack,
+ &res0_unpack,
+ &res0_look,
+ &res0_copy_info,
+ &res0_free_info,
+ &res0_free_look,
+ &res2_class,
+ &res2_forward,
+ &res2_inverse
};
projects / platform / upstream / libvorbis.git / blobdiff