1 files changed, 163 insertions, 0 deletions
diff --git a/contrib/vorbis/vq/latticetune.c b/contrib/vorbis/vq/latticetune.c
new file mode 100644
index 0000000..193d4d1
--- /dev/null
+++ b/contrib/vorbis/vq/latticetune.c
@@ -0,0 +1,163 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE 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 SOURCE CODE IS (C) COPYRIGHT 1994-2001             *
+ * by the Xiph.Org Foundation http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+ function: utility main for setting entropy encoding parameters
+           for lattice codebooks
+
+ ********************************************************************/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+#include <errno.h>
+#include "bookutil.h"
+
+static int strrcmp_i(char *s,char *cmp){
+  return(strncmp(s+strlen(s)-strlen(cmp),cmp,strlen(cmp)));
+}
+
+/* This util takes a training-collected file listing codewords used in
+   LSP fitting, then generates new codeword lengths for maximally
+   efficient integer-bits entropy encoding.
+
+   command line:
+   latticetune book.vqh input.vqd [unused_entriesp]
+
+   latticetune produces book.vqh on stdout */
+
+int main(int argc,char *argv[]){
+  codebook *b;
+  static_codebook *c;
+  long *lengths;
+  long *hits;
+
+  int entries=-1,dim=-1,guard=1;
+  FILE *in=NULL;
+  char *line,*name;
+  long j;
+
+  if(argv[1]==NULL){
+    fprintf(stderr,"Need a lattice codebook on the command line.\n");
+    exit(1);
+  }
+  if(argv[2]==NULL){
+    fprintf(stderr,"Need a codeword data file on the command line.\n");
+    exit(1);
+  }
+  if(argv[3]!=NULL)guard=0;
+
+  {
+    char *ptr;
+    char *filename=strdup(argv[1]);
+
+    b=codebook_load(filename);
+    c=(static_codebook *)(b->c);
+
+    ptr=strrchr(filename,'.');
+    if(ptr){
+      *ptr='\0';
+      name=strdup(filename);
+    }else{
+      name=strdup(filename);
+    }
+  }
+
+  if(c->maptype!=1){
+    fprintf(stderr,"Provided book is not a latticebook.\n");
+    exit(1);
+  }
+
+  entries=b->entries;
+  dim=b->dim;
+
+  hits=_ogg_malloc(entries*sizeof(long));
+  lengths=_ogg_calloc(entries,sizeof(long));
+  for(j=0;j<entries;j++)hits[j]=guard;
+
+  in=fopen(argv[2],"r");
+  if(!in){
+    fprintf(stderr,"Could not open input file %s\n",argv[2]);
+    exit(1);
+  }
+
+  if(!strrcmp_i(argv[0],"latticetune")){
+    long lines=0;
+    line=setup_line(in);
+    while(line){
+      long code;
+      lines++;
+      if(!(lines&0xfff))spinnit("codewords so far...",lines);
+
+      if(sscanf(line,"%ld",&code)==1)
+        hits[code]++;
+
+      line=setup_line(in);
+    }
+  }
+
+  /* now we simply count already collated by-entry data */
+  if(!strrcmp_i(argv[0],"res0tune") || !strrcmp_i(argv[0],"res1tune")){
+
+    line=setup_line(in);
+    while(line){
+
+      /* code:hits\n */
+      /* likely to have multiple listing for each code entry; must
+         accumulate */
+
+      char *pos=strchr(line,':');
+      if(pos){
+        long code=atol(line);
+        long val=atol(pos+1);
+        hits[code]+=val;
+      }
+
+      line=setup_line(in);
+    }
+  }
+
+  fclose(in);
+
+  /* build the codeword lengths */
+  build_tree_from_lengths0(entries,hits,lengths);
+
+  c->lengthlist=lengths;
+  write_codebook(stdout,name,c);
+
+  {
+    long bins=_book_maptype1_quantvals(c);
+    long i,k,base=c->lengthlist[0];
+    for(i=0;i<entries;i++)
+      if(c->lengthlist[i]>base)base=c->lengthlist[i];
+
+    for(j=0;j<entries;j++){
+      if(c->lengthlist[j]){
+        int indexdiv=1;
+        fprintf(stderr,"%4ld: ",j);
+        for(k=0;k<c->dim;k++){
+          int index= (j/indexdiv)%bins;
+          fprintf(stderr,"%+3.1f,", c->quantlist[index]*_float32_unpack(c->q_delta)+
+                 _float32_unpack(c->q_min));
+          indexdiv*=bins;
+        }
+        fprintf(stderr,"\t|");
+        for(k=0;k<base-c->lengthlist[j];k++)fprintf(stderr,"*");
+        fprintf(stderr,"\n");
+      }
+    }
+  }
+
+  fprintf(stderr,"\r                                                     "
+          "\nDone.\n");
+  exit(0);
+}