Replace Tremor with Tremolo (an ARM optimised version of the Tremor library for doing Ogg Vorbis decompression)
diff --git a/Tremolo/res012.c b/Tremolo/res012.c
new file mode 100644
index 0000000..4f659af
--- /dev/null
+++ b/Tremolo/res012.c
@@ -0,0 +1,224 @@
+/********************************************************************
+ * *
+ * 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;
+}
+