1 /********************************************************************
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
11 ********************************************************************
13 function: residue backend 0 and 1 implementation
14 last mod: $Id: res0.c,v 1.27 2001/05/27 06:44:01 xiphmont Exp $
16 ********************************************************************/
18 /* Slow, slow, slow, simpleminded and did I mention it was slow? The
19 encode/decode loops are coded for clarity and performance is not
20 yet even a nagging little idea lurking in the shadows. Oh and BTW,
28 #include "vorbis/codec.h"
29 #include "codec_internal.h"
36 vorbis_info_residue0 *info;
41 codebook ***partbooks;
45 } vorbis_look_residue0;
47 vorbis_info_residue *res0_copy_info(vorbis_info_residue *vr){
48 vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
49 vorbis_info_residue0 *ret=_ogg_malloc(sizeof(vorbis_info_residue0));
50 memcpy(ret,info,sizeof(vorbis_info_residue0));
54 void res0_free_info(vorbis_info_residue *i){
56 memset(i,0,sizeof(vorbis_info_residue0));
61 void res0_free_look(vorbis_look_residue *i){
64 vorbis_look_residue0 *look=(vorbis_look_residue0 *)i;
65 for(j=0;j<look->parts;j++)
66 if(look->partbooks[j])_ogg_free(look->partbooks[j]);
67 _ogg_free(look->partbooks);
68 for(j=0;j<look->partvals;j++)
69 _ogg_free(look->decodemap[j]);
70 _ogg_free(look->decodemap);
71 memset(i,0,sizeof(vorbis_look_residue0));
76 void res0_pack(vorbis_info_residue *vr,oggpack_buffer *opb){
77 vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
79 oggpack_write(opb,info->begin,24);
80 oggpack_write(opb,info->end,24);
82 oggpack_write(opb,info->grouping-1,24); /* residue vectors to group and
83 code with a partitioned book */
84 oggpack_write(opb,info->partitions-1,6); /* possible partition choices */
85 oggpack_write(opb,info->groupbook,8); /* group huffman book */
86 for(j=0;j<info->partitions;j++){
87 oggpack_write(opb,info->secondstages[j],4); /* zero *is* a valid choice */
88 acc+=info->secondstages[j];
91 oggpack_write(opb,info->booklist[j],8);
95 /* vorbis_info is for range checking */
96 vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){
98 vorbis_info_residue0 *info=_ogg_calloc(1,sizeof(vorbis_info_residue0));
99 codec_setup_info *ci=vi->codec_setup;
101 info->begin=oggpack_read(opb,24);
102 info->end=oggpack_read(opb,24);
103 info->grouping=oggpack_read(opb,24)+1;
104 info->partitions=oggpack_read(opb,6)+1;
105 info->groupbook=oggpack_read(opb,8);
106 for(j=0;j<info->partitions;j++){
107 int cascade=info->secondstages[j]=oggpack_read(opb,4);
108 if(cascade>1)goto errout; /* temporary! when cascading gets
109 reworked and actually used, we don't
110 want old code to DTWT */
114 info->booklist[j]=oggpack_read(opb,8);
115 if(info->booklist[j]==255)info->booklist[j]=-1;
118 if(info->groupbook>=ci->books)goto errout;
120 if(info->booklist[j]>=ci->books)goto errout;
124 res0_free_info(info);
128 vorbis_look_residue *res0_look (vorbis_dsp_state *vd,vorbis_info_mode *vm,
129 vorbis_info_residue *vr){
130 vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
131 vorbis_look_residue0 *look=_ogg_calloc(1,sizeof(vorbis_look_residue0));
132 backend_lookup_state *be=vd->backend_state;
137 look->map=vm->mapping;
139 look->parts=info->partitions;
140 look->phrasebook=be->fullbooks+info->groupbook;
141 dim=look->phrasebook->dim;
143 look->partbooks=_ogg_calloc(look->parts,sizeof(codebook **));
145 for(j=0;j<look->parts;j++){
146 int stages=info->secondstages[j];
148 look->partbooks[j]=_ogg_malloc(stages*sizeof(codebook *));
149 look->partbooks[j][0]=be->fullbooks+info->booklist[acc++];
153 look->partvals=rint(pow(look->parts,dim));
154 look->decodemap=_ogg_malloc(look->partvals*sizeof(int *));
155 for(j=0;j<look->partvals;j++){
157 long mult=look->partvals/look->parts;
158 look->decodemap[j]=_ogg_malloc(dim*sizeof(int));
163 look->decodemap[j][k]=deco;
171 /* does not guard against invalid settings; eg, a subn of 16 and a
172 subgroup request of 32. Max subn of 128 */
173 static int _interleaved_testhack(float *vec,int n,vorbis_look_residue0 *look,
174 int auxparts,int auxpartnum){
175 vorbis_info_residue0 *info=look->info;
177 float max,localmax=0.f;
182 for(i=0;i<n;i++)temp[i]=fabs(vec[i]);
184 /* handle case subgrp==1 outside */
186 if(temp[i]>localmax)localmax=temp[i];
189 for(i=0;i<n;i++)temp[i]=rint(temp[i]);
202 if(temp[i]>localmax)localmax=temp[i];
205 for(i=0;i<auxparts-1;i++)
206 if(auxpartnum<info->blimit[i] &&
207 entropy[info->subgrp[i]]<=info->entmax[i] &&
208 max<=info->ampmax[i])
214 static int _testhack(float *vec,int n,vorbis_look_residue0 *look,
215 int auxparts,int auxpartnum){
216 vorbis_info_residue0 *info=look->info;
218 float max,localmax=0.f;
223 for(i=0;i<n;i++)temp[i]=fabs(vec[i]);
225 /* handle case subgrp==1 outside */
227 if(temp[i]>localmax)localmax=temp[i];
230 for(i=0;i<n;i++)temp[i]=rint(temp[i]);
238 temp[i]=temp[i*2]+temp[i*2+1];
242 if(temp[i]>localmax)localmax=temp[i];
245 for(i=0;i<auxparts-1;i++)
246 if(auxpartnum<info->blimit[i] &&
247 entropy[info->subgrp[i]]<=info->entmax[i] &&
248 max<=info->ampmax[i])
254 static int _interleaved_encodepart(oggpack_buffer *opb,float *vec, int n,
255 int stages, codebook **books,int mode,
259 int dim=books[j]->dim;
262 int entry=vorbis_book_besterror(books[j],vec+i,step,0);
267 sprintf(buf,"res0_%da%d_%d.vqd",mode,j,part);
269 fprintf(f,"%d\n",entry);
273 bits+=vorbis_book_encode(books[j],entry,opb);
279 static int _encodepart(oggpack_buffer *opb,float *vec, int n,
280 int stages, codebook **books,int mode,int part){
283 int dim=books[j]->dim;
286 int entry=vorbis_book_besterror(books[j],vec+i*dim,1,0);
291 sprintf(buf,"res0_%da%d_%d.vqd",mode,j,part);
293 fprintf(f,"%d\n",entry);
297 bits+=vorbis_book_encode(books[j],entry,opb);
303 /* doesn;t yet deal with cascading */
304 static int _interleaved_decodepart(oggpack_buffer *opb,float *work,
306 int stages, codebook **books){
309 memset(work,0,sizeof(float)*n);
311 int step=n/books[0]->dim;
312 if(s_vorbis_book_decodevs(books[0],work,opb,step,0)==-1)
322 static int _decodepart(oggpack_buffer *opb,float *work,
324 int stages, codebook **books){
327 memset(work,0,sizeof(float)*n);
329 if(s_vorbis_book_decodev(books[0],work,opb,n,0)==-1)
339 static int _01forward(vorbis_block *vb,vorbis_look_residue *vl,
341 int (*classify)(float *,int,vorbis_look_residue0 *,
343 int (*encode)(oggpack_buffer *,float *,int,int,
344 codebook **,int,int)){
346 vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
347 vorbis_info_residue0 *info=look->info;
349 /* move all this setup out later */
350 int samples_per_partition=info->grouping;
351 int possible_partitions=info->partitions;
352 int partitions_per_word=look->phrasebook->dim;
353 int n=info->end-info->begin;
354 long phrasebits=0,resbitsT=0;
355 long *resbits=alloca(sizeof(long)*possible_partitions);
356 long *resvals=alloca(sizeof(long)*possible_partitions);
358 int partvals=n/samples_per_partition;
359 int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
360 long **partword=_vorbis_block_alloc(vb,ch*sizeof(long *));
362 partvals=partwords*partitions_per_word;
364 /* we find the patition type for each partition of each
365 channel. We'll go back and do the interleaved encoding in a
366 bit. For now, clarity */
368 memset(resbits,0,sizeof(long)*possible_partitions);
369 memset(resvals,0,sizeof(long)*possible_partitions);
372 partword[i]=_vorbis_block_alloc(vb,n/samples_per_partition*sizeof(long));
373 memset(partword[i],0,n/samples_per_partition*sizeof(long));
376 for(i=info->begin,l=0;i<info->end;i+=samples_per_partition,l++){
378 /* do the partition decision based on the 'entropy'
381 classify(in[j]+i,samples_per_partition,look,possible_partitions,l);
385 /* we code the partition words for each channel, then the residual
386 words for a partition per channel until we've written all the
387 residual words for that partition word. Then write the next
388 partition channel words... */
390 for(i=info->begin,l=0;i<info->end;){
392 /* first we encode a partition codeword for each channel */
394 long val=partword[j][l];
395 for(k=1;k<partitions_per_word;k++)
396 val= val*possible_partitions+partword[j][l+k];
397 phrasebits+=vorbis_book_encode(look->phrasebook,val,&vb->opb);
399 /* now we encode interleaved residual values for the partitions */
400 for(k=0;k<partitions_per_word;k++,l++,i+=samples_per_partition)
402 /*resbits[partword[j][l]]+=*/
403 resbitsT+=encode(&vb->opb,in[j]+i,samples_per_partition,
404 info->secondstages[partword[j][l]],
405 look->partbooks[partword[j][l]],look->map,partword[j][l]);
406 resvals[partword[j][l]]+=samples_per_partition;
411 for(i=0;i<possible_partitions;i++)resbitsT+=resbits[i];
413 "Encoded %ld res vectors in %ld phrasing and %ld res bits\n\t",
414 ch*(info->end-info->begin),phrasebits,resbitsT);
415 for(i=0;i<possible_partitions;i++)
416 fprintf(stderr,"%ld(%ld):%ld ",i,resvals[i],resbits[i]);
417 fprintf(stderr,"\n");*/
422 /* a truncated packet here just means 'stop working'; it's not an error */
423 static int _01inverse(vorbis_block *vb,vorbis_look_residue *vl,
425 int (*decodepart)(oggpack_buffer *,float *,float *,
426 int,int,codebook **)){
427 long i,j,k,l,transend=vb->pcmend/2;
428 vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
429 vorbis_info_residue0 *info=look->info;
431 /* move all this setup out later */
432 int samples_per_partition=info->grouping;
433 int partitions_per_word=look->phrasebook->dim;
434 int n=info->end-info->begin;
436 int partvals=n/samples_per_partition;
437 int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
438 int **partword=alloca(ch*sizeof(long *));
439 float *work=alloca(sizeof(float)*samples_per_partition);
440 partvals=partwords*partitions_per_word;
442 /* make sure we're zeroed up to the start */
444 memset(in[j],0,sizeof(float)*info->begin);
446 for(i=info->begin,l=0;i<info->end;){
447 /* fetch the partition word for each channel */
449 int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
450 if(temp==-1)goto eopbreak;
451 partword[j]=look->decodemap[temp];
452 if(partword[j]==NULL)goto errout;
455 /* now we decode residual values for the partitions */
456 for(k=0;k<partitions_per_word;k++,l++,i+=samples_per_partition)
458 int part=partword[j][k];
459 if(decodepart(&vb->opb,work,in[j]+i,samples_per_partition,
460 info->secondstages[part],
461 look->partbooks[part])==-1)goto eopbreak;
468 memset(in[j]+i,0,sizeof(float)*(transend-i));
475 memset(in[j],0,sizeof(float)*transend);
479 /* residue 0 and 1 are just slight variants of one another. 0 is
480 interleaved, 1 is not */
481 int res0_forward(vorbis_block *vb,vorbis_look_residue *vl,
483 return(_01forward(vb,vl,in,ch,_interleaved_testhack,_interleaved_encodepart));
486 int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl,float **in,int ch){
487 return(_01inverse(vb,vl,in,ch,_interleaved_decodepart));
490 int res1_forward(vorbis_block *vb,vorbis_look_residue *vl,
492 return(_01forward(vb,vl,in,ch,_testhack,_encodepart));
495 int res1_inverse(vorbis_block *vb,vorbis_look_residue *vl,float **in,int ch){
496 return(_01inverse(vb,vl,in,ch,_decodepart));
499 vorbis_func_residue residue0_exportbundle={
510 vorbis_func_residue residue1_exportbundle={