890 lines
24 KiB
C
Executable File
890 lines
24 KiB
C
Executable File
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
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* by the Xiph.Org Foundation http://www.xiph.org/ *
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* *
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********************************************************************
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function: residue backend 0, 1 and 2 implementation
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last mod: $Id: res0.c 17556 2010-10-21 18:25:19Z tterribe $
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********************************************************************/
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/* Slow, slow, slow, simpleminded and did I mention it was slow? The
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encode/decode loops are coded for clarity and performance is not
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yet even a nagging little idea lurking in the shadows. Oh and BTW,
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it's slow. */
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <ogg/ogg.h>
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#include "vorbis/codec.h"
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#include "codec_internal.h"
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#include "registry.h"
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#include "codebook.h"
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#include "misc.h"
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#include "os.h"
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//#define TRAIN_RES 1
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//#define TRAIN_RESAUX 1
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#if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
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#include <stdio.h>
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#endif
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typedef struct {
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vorbis_info_residue0 *info;
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int parts;
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int stages;
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codebook *fullbooks;
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codebook *phrasebook;
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codebook ***partbooks;
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int partvals;
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int **decodemap;
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long postbits;
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long phrasebits;
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long frames;
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#if defined(TRAIN_RES) || defined(TRAIN_RESAUX)
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int train_seq;
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long *training_data[8][64];
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float training_max[8][64];
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float training_min[8][64];
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float tmin;
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float tmax;
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int submap;
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#endif
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} vorbis_look_residue0;
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void res0_free_info(vorbis_info_residue *i){
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vorbis_info_residue0 *info=(vorbis_info_residue0 *)i;
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if(info){
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memset(info,0,sizeof(*info));
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_ogg_free(info);
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}
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}
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void res0_free_look(vorbis_look_residue *i){
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int j;
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if(i){
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vorbis_look_residue0 *look=(vorbis_look_residue0 *)i;
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#ifdef TRAIN_RES
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{
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int j,k,l;
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for(j=0;j<look->parts;j++){
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/*fprintf(stderr,"partition %d: ",j);*/
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for(k=0;k<8;k++)
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if(look->training_data[k][j]){
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char buffer[80];
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FILE *of;
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codebook *statebook=look->partbooks[j][k];
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/* long and short into the same bucket by current convention */
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sprintf(buffer,"res_sub%d_part%d_pass%d.vqd",look->submap,j,k);
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of=fopen(buffer,"a");
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for(l=0;l<statebook->entries;l++)
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fprintf(of,"%d:%ld\n",l,look->training_data[k][j][l]);
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fclose(of);
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/*fprintf(stderr,"%d(%.2f|%.2f) ",k,
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look->training_min[k][j],look->training_max[k][j]);*/
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_ogg_free(look->training_data[k][j]);
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look->training_data[k][j]=NULL;
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}
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/*fprintf(stderr,"\n");*/
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}
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}
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fprintf(stderr,"min/max residue: %g::%g\n",look->tmin,look->tmax);
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/*fprintf(stderr,"residue bit usage %f:%f (%f total)\n",
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(float)look->phrasebits/look->frames,
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(float)look->postbits/look->frames,
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(float)(look->postbits+look->phrasebits)/look->frames);*/
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#endif
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/*vorbis_info_residue0 *info=look->info;
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fprintf(stderr,
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"%ld frames encoded in %ld phrasebits and %ld residue bits "
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"(%g/frame) \n",look->frames,look->phrasebits,
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look->resbitsflat,
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(look->phrasebits+look->resbitsflat)/(float)look->frames);
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for(j=0;j<look->parts;j++){
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long acc=0;
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fprintf(stderr,"\t[%d] == ",j);
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for(k=0;k<look->stages;k++)
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if((info->secondstages[j]>>k)&1){
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fprintf(stderr,"%ld,",look->resbits[j][k]);
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acc+=look->resbits[j][k];
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}
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fprintf(stderr,":: (%ld vals) %1.2fbits/sample\n",look->resvals[j],
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acc?(float)acc/(look->resvals[j]*info->grouping):0);
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}
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fprintf(stderr,"\n");*/
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for(j=0;j<look->parts;j++)
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if(look->partbooks[j])_ogg_free(look->partbooks[j]);
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_ogg_free(look->partbooks);
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for(j=0;j<look->partvals;j++)
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_ogg_free(look->decodemap[j]);
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_ogg_free(look->decodemap);
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memset(look,0,sizeof(*look));
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_ogg_free(look);
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}
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}
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static int ilog(unsigned int v){
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int ret=0;
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while(v){
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ret++;
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v>>=1;
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}
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return(ret);
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}
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static int icount(unsigned int v){
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int ret=0;
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while(v){
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ret+=v&1;
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v>>=1;
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}
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return(ret);
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}
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void res0_pack(vorbis_info_residue *vr,oggpack_buffer *opb){
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vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
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int j,acc=0;
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oggpack_write(opb,info->begin,24);
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oggpack_write(opb,info->end,24);
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oggpack_write(opb,info->grouping-1,24); /* residue vectors to group and
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code with a partitioned book */
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oggpack_write(opb,info->partitions-1,6); /* possible partition choices */
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oggpack_write(opb,info->groupbook,8); /* group huffman book */
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/* secondstages is a bitmask; as encoding progresses pass by pass, a
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bitmask of one indicates this partition class has bits to write
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this pass */
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for(j=0;j<info->partitions;j++){
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if(ilog(info->secondstages[j])>3){
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/* yes, this is a minor hack due to not thinking ahead */
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oggpack_write(opb,info->secondstages[j],3);
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oggpack_write(opb,1,1);
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oggpack_write(opb,info->secondstages[j]>>3,5);
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}else
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oggpack_write(opb,info->secondstages[j],4); /* trailing zero */
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acc+=icount(info->secondstages[j]);
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}
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for(j=0;j<acc;j++)
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oggpack_write(opb,info->booklist[j],8);
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}
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/* vorbis_info is for range checking */
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vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){
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int j,acc=0;
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vorbis_info_residue0 *info=_ogg_calloc(1,sizeof(*info));
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codec_setup_info *ci=vi->codec_setup;
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info->begin=oggpack_read(opb,24);
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info->end=oggpack_read(opb,24);
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info->grouping=oggpack_read(opb,24)+1;
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info->partitions=oggpack_read(opb,6)+1;
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info->groupbook=oggpack_read(opb,8);
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/* check for premature EOP */
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if(info->groupbook<0)goto errout;
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for(j=0;j<info->partitions;j++){
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int cascade=oggpack_read(opb,3);
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int cflag=oggpack_read(opb,1);
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if(cflag<0) goto errout;
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if(cflag){
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int c=oggpack_read(opb,5);
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if(c<0) goto errout;
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cascade|=(c<<3);
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}
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info->secondstages[j]=cascade;
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acc+=icount(cascade);
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}
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for(j=0;j<acc;j++){
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int book=oggpack_read(opb,8);
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if(book<0) goto errout;
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info->booklist[j]=book;
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}
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if(info->groupbook>=ci->books)goto errout;
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for(j=0;j<acc;j++){
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if(info->booklist[j]>=ci->books)goto errout;
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if(ci->book_param[info->booklist[j]]->maptype==0)goto errout;
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}
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/* verify the phrasebook is not specifying an impossible or
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inconsistent partitioning scheme. */
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/* modify the phrasebook ranging check from r16327; an early beta
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encoder had a bug where it used an oversized phrasebook by
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accident. These files should continue to be playable, but don't
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allow an exploit */
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{
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int entries = ci->book_param[info->groupbook]->entries;
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int dim = ci->book_param[info->groupbook]->dim;
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int partvals = 1;
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if (dim<1) goto errout;
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while(dim>0){
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partvals *= info->partitions;
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if(partvals > entries) goto errout;
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dim--;
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}
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info->partvals = partvals;
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}
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return(info);
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errout:
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res0_free_info(info);
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return(NULL);
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}
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vorbis_look_residue *res0_look(vorbis_dsp_state *vd,
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vorbis_info_residue *vr){
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vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
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vorbis_look_residue0 *look=_ogg_calloc(1,sizeof(*look));
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codec_setup_info *ci=vd->vi->codec_setup;
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int j,k,acc=0;
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int dim;
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int maxstage=0;
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look->info=info;
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look->parts=info->partitions;
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look->fullbooks=ci->fullbooks;
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look->phrasebook=ci->fullbooks+info->groupbook;
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dim=look->phrasebook->dim;
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look->partbooks=_ogg_calloc(look->parts,sizeof(*look->partbooks));
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for(j=0;j<look->parts;j++){
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int stages=ilog(info->secondstages[j]);
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if(stages){
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if(stages>maxstage)maxstage=stages;
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look->partbooks[j]=_ogg_calloc(stages,sizeof(*look->partbooks[j]));
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for(k=0;k<stages;k++)
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if(info->secondstages[j]&(1<<k)){
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look->partbooks[j][k]=ci->fullbooks+info->booklist[acc++];
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#ifdef TRAIN_RES
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look->training_data[k][j]=_ogg_calloc(look->partbooks[j][k]->entries,
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sizeof(***look->training_data));
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#endif
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}
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}
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}
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look->partvals=1;
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for(j=0;j<dim;j++)
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look->partvals*=look->parts;
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look->stages=maxstage;
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look->decodemap=_ogg_malloc(look->partvals*sizeof(*look->decodemap));
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for(j=0;j<look->partvals;j++){
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long val=j;
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long mult=look->partvals/look->parts;
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look->decodemap[j]=_ogg_malloc(dim*sizeof(*look->decodemap[j]));
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for(k=0;k<dim;k++){
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long deco=val/mult;
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val-=deco*mult;
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mult/=look->parts;
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look->decodemap[j][k]=deco;
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}
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}
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#if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
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{
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static int train_seq=0;
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look->train_seq=train_seq++;
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}
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#endif
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return(look);
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}
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/* break an abstraction and copy some code for performance purposes */
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static int local_book_besterror(codebook *book,int *a){
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int dim=book->dim;
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int i,j,o;
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int minval=book->minval;
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int del=book->delta;
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int qv=book->quantvals;
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int ze=(qv>>1);
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int index=0;
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/* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */
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int p[8]={0,0,0,0,0,0,0,0};
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if(del!=1){
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for(i=0,o=dim;i<dim;i++){
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int v = (a[--o]-minval+(del>>1))/del;
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int m = (v<ze ? ((ze-v)<<1)-1 : ((v-ze)<<1));
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index = index*qv+ (m<0?0:(m>=qv?qv-1:m));
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p[o]=v*del+minval;
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}
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}else{
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for(i=0,o=dim;i<dim;i++){
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int v = a[--o]-minval;
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int m = (v<ze ? ((ze-v)<<1)-1 : ((v-ze)<<1));
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index = index*qv+ (m<0?0:(m>=qv?qv-1:m));
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p[o]=v*del+minval;
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}
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}
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if(book->c->lengthlist[index]<=0){
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const static_codebook *c=book->c;
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int best=-1;
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/* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */
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int e[8]={0,0,0,0,0,0,0,0};
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int maxval = book->minval + book->delta*(book->quantvals-1);
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for(i=0;i<book->entries;i++){
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if(c->lengthlist[i]>0){
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int this=0;
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for(j=0;j<dim;j++){
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int val=(e[j]-a[j]);
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this+=val*val;
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}
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if(best==-1 || this<best){
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memcpy(p,e,sizeof(p));
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best=this;
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index=i;
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}
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}
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/* assumes the value patterning created by the tools in vq/ */
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j=0;
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while(e[j]>=maxval)
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e[j++]=0;
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if(e[j]>=0)
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e[j]+=book->delta;
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e[j]= -e[j];
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}
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}
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if(index>-1){
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for(i=0;i<dim;i++)
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*a++ -= p[i];
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}
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return(index);
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}
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static int _encodepart(oggpack_buffer *opb,int *vec, int n,
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codebook *book,long *acc){
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int i,bits=0;
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int dim=book->dim;
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int step=n/dim;
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for(i=0;i<step;i++){
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int entry=local_book_besterror(book,vec+i*dim);
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#ifdef TRAIN_RES
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if(entry>=0)
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acc[entry]++;
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#endif
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bits+=vorbis_book_encode(book,entry,opb);
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}
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return(bits);
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}
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static long **_01class(vorbis_block *vb,vorbis_look_residue *vl,
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int **in,int ch){
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long i,j,k;
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vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
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vorbis_info_residue0 *info=look->info;
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/* move all this setup out later */
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int samples_per_partition=info->grouping;
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int possible_partitions=info->partitions;
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int n=info->end-info->begin;
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int partvals=n/samples_per_partition;
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long **partword=_vorbis_block_alloc(vb,ch*sizeof(*partword));
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float scale=100./samples_per_partition;
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/* we find the partition type for each partition of each
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channel. We'll go back and do the interleaved encoding in a
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bit. For now, clarity */
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for(i=0;i<ch;i++){
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partword[i]=_vorbis_block_alloc(vb,n/samples_per_partition*sizeof(*partword[i]));
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memset(partword[i],0,n/samples_per_partition*sizeof(*partword[i]));
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}
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for(i=0;i<partvals;i++){
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int offset=i*samples_per_partition+info->begin;
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for(j=0;j<ch;j++){
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int max=0;
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int ent=0;
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for(k=0;k<samples_per_partition;k++){
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if(abs(in[j][offset+k])>max)max=abs(in[j][offset+k]);
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ent+=abs(in[j][offset+k]);
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}
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ent*=scale;
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for(k=0;k<possible_partitions-1;k++)
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if(max<=info->classmetric1[k] &&
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(info->classmetric2[k]<0 || ent<info->classmetric2[k]))
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break;
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partword[j][i]=k;
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}
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}
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#ifdef TRAIN_RESAUX
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{
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FILE *of;
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char buffer[80];
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for(i=0;i<ch;i++){
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sprintf(buffer,"resaux_%d.vqd",look->train_seq);
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of=fopen(buffer,"a");
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for(j=0;j<partvals;j++)
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fprintf(of,"%ld, ",partword[i][j]);
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fprintf(of,"\n");
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fclose(of);
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}
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}
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#endif
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look->frames++;
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return(partword);
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}
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|
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/* designed for stereo or other modes where the partition size is an
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integer multiple of the number of channels encoded in the current
|
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submap */
|
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static long **_2class(vorbis_block *vb,vorbis_look_residue *vl,int **in,
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int ch){
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long i,j,k,l;
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vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
|
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vorbis_info_residue0 *info=look->info;
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/* move all this setup out later */
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int samples_per_partition=info->grouping;
|
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int possible_partitions=info->partitions;
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int n=info->end-info->begin;
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|
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int partvals=n/samples_per_partition;
|
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long **partword=_vorbis_block_alloc(vb,sizeof(*partword));
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|
|
#if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
|
|
FILE *of;
|
|
char buffer[80];
|
|
#endif
|
|
|
|
partword[0]=_vorbis_block_alloc(vb,partvals*sizeof(*partword[0]));
|
|
memset(partword[0],0,partvals*sizeof(*partword[0]));
|
|
|
|
for(i=0,l=info->begin/ch;i<partvals;i++){
|
|
int magmax=0;
|
|
int angmax=0;
|
|
for(j=0;j<samples_per_partition;j+=ch){
|
|
if(abs(in[0][l])>magmax)magmax=abs(in[0][l]);
|
|
for(k=1;k<ch;k++)
|
|
if(abs(in[k][l])>angmax)angmax=abs(in[k][l]);
|
|
l++;
|
|
}
|
|
|
|
for(j=0;j<possible_partitions-1;j++)
|
|
if(magmax<=info->classmetric1[j] &&
|
|
angmax<=info->classmetric2[j])
|
|
break;
|
|
|
|
partword[0][i]=j;
|
|
|
|
}
|
|
|
|
#ifdef TRAIN_RESAUX
|
|
sprintf(buffer,"resaux_%d.vqd",look->train_seq);
|
|
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(oggpack_buffer *opb,
|
|
vorbis_block *vb,vorbis_look_residue *vl,
|
|
int **in,int ch,
|
|
long **partword,
|
|
int (*encode)(oggpack_buffer *,int *,int,
|
|
codebook *,long *),
|
|
int submap){
|
|
long i,j,k,s;
|
|
vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
|
|
vorbis_info_residue0 *info=look->info;
|
|
|
|
#ifdef TRAIN_RES
|
|
look->submap=submap;
|
|
#endif
|
|
|
|
/* 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=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=0;s<look->stages;s++){
|
|
|
|
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];
|
|
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)
|
|
look->phrasebits+=vorbis_book_encode(look->phrasebook,val,opb);
|
|
#if 0 /*def TRAIN_RES*/
|
|
else
|
|
fprintf(stderr,"!");
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
|
|
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 ret;
|
|
long *accumulator=NULL;
|
|
|
|
#ifdef TRAIN_RES
|
|
accumulator=look->training_data[s][partword[j][i]];
|
|
{
|
|
int l;
|
|
int *samples=in[j]+offset;
|
|
for(l=0;l<samples_per_partition;l++){
|
|
if(samples[l]<look->training_min[s][partword[j][i]])
|
|
look->training_min[s][partword[j][i]]=samples[l];
|
|
if(samples[l]>look->training_max[s][partword[j][i]])
|
|
look->training_max[s][partword[j][i]]=samples[l];
|
|
}
|
|
}
|
|
#endif
|
|
|
|
ret=encode(opb,in[j]+offset,samples_per_partition,
|
|
statebook,accumulator);
|
|
|
|
look->postbits+=ret;
|
|
resbits[partword[j][i]]+=ret;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*{
|
|
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);
|
|
}
|
|
|
|
/* 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 max=vb->pcmend>>1;
|
|
int end=(info->end<max?info->end:max);
|
|
int n=end-info->begin;
|
|
|
|
if(n>0){
|
|
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_per_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 || temp>=info->partvals)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);
|
|
}
|
|
|
|
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(oggpack_buffer *opb,vorbis_block *vb,vorbis_look_residue *vl,
|
|
int **in,int *nonzero,int ch, long **partword, int submap){
|
|
int i,used=0;
|
|
for(i=0;i<ch;i++)
|
|
if(nonzero[i])
|
|
in[used++]=in[i];
|
|
|
|
if(used){
|
|
return _01forward(opb,vb,vl,in,used,partword,_encodepart,submap);
|
|
}else{
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
long **res1_class(vorbis_block *vb,vorbis_look_residue *vl,
|
|
int **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));
|
|
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,
|
|
int **in,int *nonzero,int ch){
|
|
int i,used=0;
|
|
for(i=0;i<ch;i++)
|
|
if(nonzero[i])used++;
|
|
if(used)
|
|
return(_2class(vb,vl,in,ch));
|
|
else
|
|
return(0);
|
|
}
|
|
|
|
/* res2 is slightly more different; all the channels are interleaved
|
|
into a single vector and encoded. */
|
|
|
|
int res2_forward(oggpack_buffer *opb,
|
|
vorbis_block *vb,vorbis_look_residue *vl,
|
|
int **in,int *nonzero,int ch, long **partword,int submap){
|
|
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 :-( */
|
|
int *work=_vorbis_block_alloc(vb,ch*n*sizeof(*work));
|
|
for(i=0;i<ch;i++){
|
|
int *pcm=in[i];
|
|
if(nonzero[i])used++;
|
|
for(j=0,k=i;j<n;j++,k+=ch)
|
|
work[k]=pcm[j];
|
|
}
|
|
|
|
if(used){
|
|
return _01forward(opb,vb,vl,&work,1,partword,_encodepart,submap);
|
|
}else{
|
|
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 max=(vb->pcmend*ch)>>1;
|
|
int end=(info->end<max?info->end:max);
|
|
int n=end-info->begin;
|
|
|
|
if(n>0){
|
|
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 || temp>=info->partvals)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);
|
|
}
|
|
|
|
|
|
const vorbis_func_residue residue0_exportbundle={
|
|
NULL,
|
|
&res0_unpack,
|
|
&res0_look,
|
|
&res0_free_info,
|
|
&res0_free_look,
|
|
NULL,
|
|
NULL,
|
|
&res0_inverse
|
|
};
|
|
|
|
const vorbis_func_residue residue1_exportbundle={
|
|
&res0_pack,
|
|
&res0_unpack,
|
|
&res0_look,
|
|
&res0_free_info,
|
|
&res0_free_look,
|
|
&res1_class,
|
|
&res1_forward,
|
|
&res1_inverse
|
|
};
|
|
|
|
const vorbis_func_residue residue2_exportbundle={
|
|
&res0_pack,
|
|
&res0_unpack,
|
|
&res0_look,
|
|
&res0_free_info,
|
|
&res0_free_look,
|
|
&res2_class,
|
|
&res2_forward,
|
|
&res2_inverse
|
|
};
|