From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libtremor/res012.c | 374 ++++++++++++++++++++++++++++++++++ 1 file changed, 374 insertions(+) create mode 100644 lib/rbcodec/codecs/libtremor/res012.c (limited to 'lib/rbcodec/codecs/libtremor/res012.c') diff --git a/lib/rbcodec/codecs/libtremor/res012.c b/lib/rbcodec/codecs/libtremor/res012.c new file mode 100644 index 0000000000..e4ff440a6d --- /dev/null +++ b/lib/rbcodec/codecs/libtremor/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 "config-tremor.h" +#include +#include +#include "ogg.h" +#include "ivorbiscodec.h" +#include "codec_internal.h" +#include "registry.h" +#include "codebook.h" +#include "misc.h" +#include "os.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; + +static 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); + } +} + +static void res0_free_look(vorbis_look_residue *i){ + int j; + if(i){ + + vorbis_look_residue0 *look=(vorbis_look_residue0 *)i; + + for(j=0;jparts;j++) + if(look->partbooks[j])_ogg_free(look->partbooks[j]); + _ogg_free(look->partbooks); + for(j=0;jpartvals;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 */ +static 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;jpartitions;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;jbooklist[j]=book; + } + + if(info->groupbook>=ci->books)goto errout; + for(j=0;jbooklist[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); +} + +static 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;jparts;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;ksecondstages[j]&(1<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;jpartvals*=look->parts; + look->stages=maxstage; + look->decodemap=(int **)_ogg_malloc(look->partvals*sizeof(*look->decodemap)); + for(j=0;jpartvals;j++){ + long val=j; + long mult=look->partvals/look->parts; + look->decodemap[j]=(int *)_ogg_malloc(dim*sizeof(*look->decodemap[j])); + for(k=0;kparts; + 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->endend: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;jstages;s++){ + + /* each loop decodes on partition codeword containing + partitions_pre_word partitions */ + for(i=0,l=0;iphrasebook,&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;kbegin+i*samples_per_partition; + if(info->secondstages[partword[j][l][k]]&(1<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); +} + +static 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;iinfo; + + /* 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->endend: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;istages;s++){ + for(i=0,l=0;iphrasebook,&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;ksecondstages[partword[l][k]]&(1<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); +} + + +const vorbis_func_residue residue0_exportbundle ICONST_ATTR ={ + &res0_unpack, + &res0_look, + &res0_free_info, + &res0_free_look, + &res0_inverse +}; + +const vorbis_func_residue residue1_exportbundle ICONST_ATTR ={ + &res0_unpack, + &res0_look, + &res0_free_info, + &res0_free_look, + &res1_inverse +}; + +const vorbis_func_residue residue2_exportbundle ICONST_ATTR ={ + &res0_unpack, + &res0_look, + &res0_free_info, + &res0_free_look, + &res2_inverse +}; -- cgit v1.2.3