1 files changed, 374 insertions, 0 deletions

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 <string.h>
+#include <math.h>
+#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;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 */
+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;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);
+}
+
+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;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);
+}
+
+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;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);
+}
+
+static 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 */
+static int res2_inverse(vorbis_block *vb,vorbis_look_residue *vl,
+                        ogg_int32_t **in,int *nonzero,int ch)
+    ICODE_ATTR_TREMOR_NOT_MDCT;
+static 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);
+}
+
+
+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
+};