diff options
Diffstat (limited to 'media/libtremor/lib/tremor_res012.c')
| -rw-r--r-- | media/libtremor/lib/tremor_res012.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/media/libtremor/lib/tremor_res012.c b/media/libtremor/lib/tremor_res012.c new file mode 100644 index 0000000000..f036caaa48 --- /dev/null +++ b/media/libtremor/lib/tremor_res012.c @@ -0,0 +1,374 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE OggVorbis 'TREMOR' 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 OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 * + * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * + * * + ******************************************************************** + + function: residue backend 0, 1 and 2 implementation + + ********************************************************************/ + +#include <stdlib.h> +#include <string.h> +#include <math.h> +#include <ogg/ogg.h> +#include "ivorbiscodec.h" +#include "codec_internal.h" +#include "registry.h" +#include "codebook.h" +#include "misc.h" +#include "os.h" +#include "block.h" + +typedef struct { + vorbis_info_residue0 *info; + int map; + + int parts; + int stages; + codebook *fullbooks; + codebook *phrasebook; + codebook ***partbooks; + + int partvals; + int **decodemap; + +} vorbis_look_residue0; + +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 res0_free_look(vorbis_look_residue *i){ + int j; + if(i){ + + vorbis_look_residue0 *look=(vorbis_look_residue0 *)i; + + 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); +} + +/* vorbis_info is for range checking */ +vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){ + int j,acc=0; + vorbis_info_residue0 *info=(vorbis_info_residue0 *)_ogg_calloc(1,sizeof(*info)); + codec_setup_info *ci=(codec_setup_info *)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); + + /* check for premature EOP */ + if(info->groupbook<0)goto errout; + + for(j=0;j<info->partitions;j++){ + int cascade=oggpack_read(opb,3); + int cflag=oggpack_read(opb,1); + if(cflag<0) goto errout; + if(cflag){ + int c=oggpack_read(opb,5); + if(c<0) goto errout; + cascade|=(c<<3); + } + info->secondstages[j]=cascade; + + acc+=icount(cascade); + } + for(j=0;j<acc;j++){ + int book=oggpack_read(opb,8); + if(book<0) goto errout; + info->booklist[j]=book; + } + + if(info->groupbook>=ci->books)goto errout; + for(j=0;j<acc;j++){ + if(info->booklist[j]>=ci->books)goto errout; + if(ci->book_param[info->booklist[j]]->maptype==0)goto errout; + } + + /* verify the phrasebook is not specifying an impossible or + inconsistent partitioning scheme. */ + /* modify the phrasebook ranging check from r16327; an early beta + encoder had a bug where it used an oversized phrasebook by + accident. These files should continue to be playable, but don't + allow an exploit */ + { + int entries = ci->book_param[info->groupbook]->entries; + int dim = ci->book_param[info->groupbook]->dim; + int partvals = 1; + if (dim<1) goto errout; + while(dim>0){ + partvals *= info->partitions; + if(partvals > entries) goto errout; + dim--; + } + info->partvals = partvals; + } + + return(info); + errout: + res0_free_info(info); + return(NULL); +} + +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=(vorbis_look_residue0 *)_ogg_calloc(1,sizeof(*look)); + codec_setup_info *ci=(codec_setup_info *)vd->vi->codec_setup; + + int j,k,acc=0; + int dim; + int maxstage=0; + look->info=info; + look->map=vm->mapping; + + look->parts=info->partitions; + look->fullbooks=ci->fullbooks; + look->phrasebook=ci->fullbooks+info->groupbook; + dim=look->phrasebook->dim; + + look->partbooks=(codebook ***)_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]=(codebook **)_ogg_calloc(stages,sizeof(*look->partbooks[j])); + for(k=0;k<stages;k++) + if(info->secondstages[j]&(1<<k)){ + look->partbooks[j][k]=ci->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=look->parts; + for(j=1;j<dim;j++)look->partvals*=look->parts; + look->stages=maxstage; + look->decodemap=(int **)_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]=(int *)_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; + } + } + + return(look); +} + + +/* a truncated packet here just means 'stop working'; it's not an error */ +static int _01inverse(vorbis_block *vb,vorbis_look_residue *vl, + ogg_int32_t **in,int ch, + long (*decodepart)(codebook *, ogg_int32_t *, + oggpack_buffer *,int,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=(int ***)alloca(ch*sizeof(*partword)); + + for(j=0;j<ch;j++) + partword[j]=(int **)_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 || 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,-8)==-1)goto eopbreak; + } + } + } + } + } + } + errout: + eopbreak: + return(0); +} + +int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl, + ogg_int32_t **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_inverse(vorbis_block *vb,vorbis_look_residue *vl, + ogg_int32_t **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); +} + +/* duplicate code here as speed is somewhat more important */ +int res2_inverse(vorbis_block *vb,vorbis_look_residue *vl, + ogg_int32_t **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=(int **)_vorbis_block_alloc(vb,partwords*sizeof(*partword)); + int beginoff=info->begin/ch; + + for(i=0;i<ch;i++)if(nonzero[i])break; + if(i==ch)return(0); /* no nonzero vectors */ + + samples_per_partition/=ch; + + 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+beginoff,ch, + &vb->opb, + samples_per_partition,-8)==-1) + goto eopbreak; + } + } + } + } + } + errout: + eopbreak: + return(0); +} + + +vorbis_func_residue residue0_exportbundle={ + &res0_unpack, + &res0_look, + &res0_free_info, + &res0_free_look, + &res0_inverse +}; + +vorbis_func_residue residue1_exportbundle={ + &res0_unpack, + &res0_look, + &res0_free_info, + &res0_free_look, + &res1_inverse +}; + +vorbis_func_residue residue2_exportbundle={ + &res0_unpack, + &res0_look, + &res0_free_info, + &res0_free_look, + &res2_inverse +}; |