internal Tremor decoder for Ogg/Vorbis

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14281 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 331 insertions, 0 deletions

diff --git a/tremor/res012.c b/tremor/res012.c
new file mode 100644
index 0000000000..d6f82d76e1
--- /dev/null
+++ b/tremor/res012.c
@@ -0,0 +1,331 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
+ *                                                                  *
+ * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
+ * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
+ * ALL REDISTRIBUTION RIGHTS RESERVED.                              *
+ *                                                                  *
+ ********************************************************************
+
+ 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 "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;
+
+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);
+
+  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->secondstages[j]=cascade;
+
+    acc+=icount(cascade);
+  }
+  for(j=0;j<acc;j++)
+    info->booklist[j]=oggpack_read(opb,8);
+
+  if(info->groupbook>=ci->books)goto errout;
+  for(j=0;j<acc;j++)
+    if(info->booklist[j]>=ci->books)goto errout;
+
+  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 n=info->end-info->begin;
+  
+  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)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 n=info->end-info->begin;
+
+  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)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
+};