diff options
Diffstat (limited to 'Tremolo/res012.c')
| -rw-r--r-- | Tremolo/res012.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/Tremolo/res012.c b/Tremolo/res012.c deleted file mode 100644 index 4f659af..0000000 --- a/Tremolo/res012.c +++ /dev/null @@ -1,224 +0,0 @@ -/******************************************************************** - * * - * 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 1994-2003 * - * 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.h" -#include "ivorbiscodec.h" -#include "codec_internal.h" -#include "codebook.h" -#include "misc.h" -#include "os.h" - -void res_clear_info(vorbis_info_residue *info){ - if(info){ - if(info->stagemasks)_ogg_free(info->stagemasks); - if(info->stagebooks)_ogg_free(info->stagebooks); - memset(info,0,sizeof(*info)); - } -} - - -/* vorbis_info is for range checking */ -int res_unpack(vorbis_info_residue *info, - vorbis_info *vi,oggpack_buffer *opb){ - int j,k; - codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; - memset(info,0,sizeof(*info)); - - info->type=oggpack_read(opb,16); - if(info->type>2 || info->type<0)goto errout; - info->begin=oggpack_read(opb,24); - info->end=oggpack_read(opb,24); - info->grouping=oggpack_read(opb,24)+1; - info->partitions=(char)(oggpack_read(opb,6)+1); - info->groupbook=(unsigned char)oggpack_read(opb,8); - if(info->groupbook>=ci->books)goto errout; - - info->stagemasks=_ogg_malloc(info->partitions*sizeof(*info->stagemasks)); - info->stagebooks=_ogg_malloc(info->partitions*8*sizeof(*info->stagebooks)); - - 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->stagemasks[j]=cascade; - } - - for(j=0;j<info->partitions;j++){ - for(k=0;k<8;k++){ - if((info->stagemasks[j]>>k)&1){ - unsigned char book=(unsigned char)oggpack_read(opb,8); - if(book>=ci->books)goto errout; - info->stagebooks[j*8+k]=book; - if(k+1>info->stages)info->stages=k+1; - }else - info->stagebooks[j*8+k]=0xff; - } - } - - if(oggpack_eop(opb))goto errout; - - return 0; - errout: - res_clear_info(info); - return 1; -} - -int res_inverse(vorbis_dsp_state *vd,vorbis_info_residue *info, - ogg_int32_t **in,int *nonzero,int ch){ - - int i,j,k,s,used=0; - codec_setup_info *ci=(codec_setup_info *)vd->vi->codec_setup; - codebook *phrasebook=ci->book_param+info->groupbook; - int samples_per_partition=info->grouping; - int partitions_per_word=phrasebook->dim; - int pcmend=ci->blocksizes[vd->W]; - - if(info->type<2){ - int max=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; - - for(i=0;i<ch;i++) - if(nonzero[i]) - in[used++]=in[i]; - ch=used; - - if(used){ - - char **partword=(char **)alloca(ch*sizeof(*partword)); - for(j=0;j<ch;j++) - partword[j]=(char *)alloca(partwords*partitions_per_word* - sizeof(*partword[j])); - - for(s=0;s<info->stages;s++){ - - for(i=0;i<partvals;){ - if(s==0){ - /* fetch the partition word for each channel */ - - partword[0][i+partitions_per_word-1]=1; - for(k=partitions_per_word-2;k>=0;k--) - partword[0][i+k]=partword[0][i+k+1]*info->partitions; - - for(j=1;j<ch;j++) - for(k=partitions_per_word-1;k>=0;k--) - partword[j][i+k]=partword[j-1][i+k]; - - for(j=0;j<ch;j++){ - int temp=vorbis_book_decode(phrasebook,&vd->opb); - if(temp==-1)goto eopbreak; - - /* this can be done quickly in assembly due to the quotient - always being at most six bits */ - for(k=0;k<partitions_per_word;k++){ - ogg_uint32_t div=partword[j][i+k]; - partword[j][i+k]=temp/div; - temp-=partword[j][i+k]*div; - } - - } - } - - /* 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->stagemasks[(int)partword[j][i]]&(1<<s)){ - codebook *stagebook=ci->book_param+ - info->stagebooks[(partword[j][i]<<3)+s]; - if(info->type){ - if(vorbis_book_decodev_add(stagebook,in[j]+offset,&vd->opb, - samples_per_partition,-8)==-1) - goto eopbreak; - }else{ - if(vorbis_book_decodevs_add(stagebook,in[j]+offset,&vd->opb, - samples_per_partition,-8)==-1) - goto eopbreak; - } - } - } - } - } - } - } - }else{ - int max=(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; - - char *partword= - (char *)alloca(partwords*partitions_per_word*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<info->stages;s++){ - for(i=0;i<partvals;){ - - if(s==0){ - int temp; - partword[i+partitions_per_word-1]=1; - for(k=partitions_per_word-2;k>=0;k--) - partword[i+k]=partword[i+k+1]*info->partitions; - - /* fetch the partition word */ - temp=vorbis_book_decode(phrasebook,&vd->opb); - if(temp==-1)goto eopbreak; - - /* this can be done quickly in assembly due to the quotient - always being at most six bits */ - for(k=0;k<partitions_per_word;k++){ - ogg_uint32_t div=partword[i+k]; - partword[i+k]=temp/div; - temp-=partword[i+k]*div; - } - } - - /* now we decode residual values for the partitions */ - for(k=0;k<partitions_per_word && i<partvals;k++,i++) - if(info->stagemasks[(int)partword[i]]&(1<<s)){ - codebook *stagebook=ci->book_param+ - info->stagebooks[(partword[i]<<3)+s]; - if(vorbis_book_decodevv_add(stagebook,in, - i*samples_per_partition+beginoff,ch, - &vd->opb, - samples_per_partition,-8)==-1) - goto eopbreak; - } - } - } - } - } - eopbreak: - - return 0; -} - |