misc/libtremor/info.c
author nemo
Tue, 06 Sep 2011 17:10:03 -0400
changeset 5796 663eea4da344
parent 5170 f7e49eff3708
permissions -rw-r--r--
Another mass hat rename, because people were just about finished fixing their teams.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/********************************************************************
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 *                                                                  *
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 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
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 *                                                                  *
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 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
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 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
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 *                                                                  *
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 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003    *
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 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
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 *                                                                  *
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 ********************************************************************
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 function: maintain the info structure, info <-> header packets
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 ********************************************************************/
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/* general handling of the header and the vorbis_info structure (and
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   substructures) */
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "ogg.h"
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#include "ivorbiscodec.h"
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#include "codec_internal.h"
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#include "codebook.h"
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#include "registry.h"
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#include "window.h"
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#include "misc.h"
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/* helpers */
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static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
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  while(bytes--){
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    *buf++=oggpack_read(o,8);
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  }
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}
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void vorbis_comment_init(vorbis_comment *vc){
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  memset(vc,0,sizeof(*vc));
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}
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/* This is more or less the same as strncasecmp - but that doesn't exist
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 * everywhere, and this is a fairly trivial function, so we include it */
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static int tagcompare(const char *s1, const char *s2, int n){
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  int c=0;
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  while(c < n){
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    if(toupper(s1[c]) != toupper(s2[c]))
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      return !0;
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    c++;
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  }
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  return 0;
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}
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char *vorbis_comment_query(vorbis_comment *vc, char *tag, int count){
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  long i;
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  int found = 0;
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  int taglen = strlen(tag)+1; /* +1 for the = we append */
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  char *fulltag = (char *)alloca(taglen+ 1);
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  strcpy(fulltag, tag);
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  strcat(fulltag, "=");
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  for(i=0;i<vc->comments;i++){
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    if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
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      if(count == found)
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	/* We return a pointer to the data, not a copy */
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      	return vc->user_comments[i] + taglen;
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      else
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	found++;
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    }
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  }
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  return NULL; /* didn't find anything */
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}
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int vorbis_comment_query_count(vorbis_comment *vc, char *tag){
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  int i,count=0;
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  int taglen = strlen(tag)+1; /* +1 for the = we append */
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  char *fulltag = (char *)alloca(taglen+1);
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  strcpy(fulltag,tag);
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  strcat(fulltag, "=");
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  for(i=0;i<vc->comments;i++){
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    if(!tagcompare(vc->user_comments[i], fulltag, taglen))
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      count++;
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  }
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  return count;
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}
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void vorbis_comment_clear(vorbis_comment *vc){
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  if(vc){
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    long i;
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    for(i=0;i<vc->comments;i++)
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      if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
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    if(vc->user_comments)_ogg_free(vc->user_comments);
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	if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
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    if(vc->vendor)_ogg_free(vc->vendor);
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    memset(vc,0,sizeof(*vc));
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  }
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}
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/* blocksize 0 is guaranteed to be short, 1 is guarantted to be long.
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   They may be equal, but short will never ge greater than long */
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int vorbis_info_blocksize(vorbis_info *vi,int zo){
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  codec_setup_info *ci = (codec_setup_info *)vi->codec_setup;
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  return ci ? ci->blocksizes[zo] : -1;
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}
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/* used by synthesis, which has a full, alloced vi */
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void vorbis_info_init(vorbis_info *vi){
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  memset(vi,0,sizeof(*vi));
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  vi->codec_setup=(codec_setup_info *)_ogg_calloc(1,sizeof(codec_setup_info));
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}
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void vorbis_info_clear(vorbis_info *vi){
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  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
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  int i;
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  if(ci){
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    for(i=0;i<ci->modes;i++)
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      if(ci->mode_param[i])_ogg_free(ci->mode_param[i]);
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    for(i=0;i<ci->maps;i++) /* unpack does the range checking */
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      if(ci->map_param[i])
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	_mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]);
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    for(i=0;i<ci->floors;i++) /* unpack does the range checking */
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      if(ci->floor_param[i])
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	_floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]);
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    for(i=0;i<ci->residues;i++) /* unpack does the range checking */
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      if(ci->residue_param[i])
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	_residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]);
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parents:
diff changeset
   136
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parents:
diff changeset
   137
    for(i=0;i<ci->books;i++){
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koda
parents:
diff changeset
   138
      if(ci->book_param[i]){
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koda
parents:
diff changeset
   139
	/* knows if the book was not alloced */
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diff changeset
   140
	vorbis_staticbook_destroy(ci->book_param[i]);
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koda
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diff changeset
   141
      }
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diff changeset
   142
      if(ci->fullbooks)
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   143
	vorbis_book_clear(ci->fullbooks+i);
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diff changeset
   144
    }
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diff changeset
   145
    if(ci->fullbooks)
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koda
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diff changeset
   146
	_ogg_free(ci->fullbooks);
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diff changeset
   147
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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diff changeset
   148
    _ogg_free(ci);
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diff changeset
   149
  }
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diff changeset
   150
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  memset(vi,0,sizeof(*vi));
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   152
}
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diff changeset
   153
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   154
/* Header packing/unpacking ********************************************/
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diff changeset
   155
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   156
static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
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   157
  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
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parents:
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   158
  if(!ci)return(OV_EFAULT);
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parents:
diff changeset
   159
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   160
  vi->version=oggpack_read(opb,32);
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   161
  if(vi->version!=0)return(OV_EVERSION);
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diff changeset
   162
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   163
  vi->channels=oggpack_read(opb,8);
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   164
  vi->rate=oggpack_read(opb,32);
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diff changeset
   165
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koda
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   166
  vi->bitrate_upper=oggpack_read(opb,32);
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   167
  vi->bitrate_nominal=oggpack_read(opb,32);
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   168
  vi->bitrate_lower=oggpack_read(opb,32);
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diff changeset
   169
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   170
  ci->blocksizes[0]=1<<oggpack_read(opb,4);
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   171
  ci->blocksizes[1]=1<<oggpack_read(opb,4);
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   172
  
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   173
  if(vi->rate<1)goto err_out;
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diff changeset
   174
  if(vi->channels<1)goto err_out;
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   175
  if(ci->blocksizes[0]<64)goto err_out; 
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koda
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   176
  if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
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   177
  if(ci->blocksizes[1]>8192)goto err_out;
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   178
  
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   179
  if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
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   180
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   181
  return(0);
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   182
 err_out:
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   183
  vorbis_info_clear(vi);
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   184
  return(OV_EBADHEADER);
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koda
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diff changeset
   185
}
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diff changeset
   186
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   187
static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){
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koda
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   188
  int i;
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koda
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   189
  int vendorlen=oggpack_read(opb,32);
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koda
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diff changeset
   190
  if(vendorlen<0)goto err_out;
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koda
parents:
diff changeset
   191
  vc->vendor=(char *)_ogg_calloc(vendorlen+1,1);
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koda
parents:
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   192
  _v_readstring(opb,vc->vendor,vendorlen);
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koda
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diff changeset
   193
  vc->comments=oggpack_read(opb,32);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   194
  if(vc->comments<0)goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   195
  vc->user_comments=(char **)_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
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koda
parents:
diff changeset
   196
  vc->comment_lengths=(int *)_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
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koda
parents:
diff changeset
   197
	    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
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diff changeset
   198
  for(i=0;i<vc->comments;i++){
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koda
parents:
diff changeset
   199
    int len=oggpack_read(opb,32);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   200
    if(len<0)goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   201
	vc->comment_lengths[i]=len;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   202
    vc->user_comments[i]=(char *)_ogg_calloc(len+1,1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   203
    _v_readstring(opb,vc->user_comments[i],len);
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koda
parents:
diff changeset
   204
  }	  
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koda
parents:
diff changeset
   205
  if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
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koda
parents:
diff changeset
   206
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   207
  return(0);
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koda
parents:
diff changeset
   208
 err_out:
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koda
parents:
diff changeset
   209
  vorbis_comment_clear(vc);
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koda
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diff changeset
   210
  return(OV_EBADHEADER);
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koda
parents:
diff changeset
   211
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
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diff changeset
   212
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   213
/* all of the real encoding details are here.  The modes, books,
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koda
parents:
diff changeset
   214
   everything */
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koda
parents:
diff changeset
   215
static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){
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koda
parents:
diff changeset
   216
  codec_setup_info     *ci=(codec_setup_info *)vi->codec_setup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   217
  int i;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   218
  if(!ci)return(OV_EFAULT);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   219
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   220
  /* codebooks */
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koda
parents:
diff changeset
   221
  ci->books=oggpack_read(opb,8)+1;
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koda
parents:
diff changeset
   222
  /*ci->book_param=_ogg_calloc(ci->books,sizeof(*ci->book_param));*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   223
  for(i=0;i<ci->books;i++){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   224
    ci->book_param[i]=(static_codebook *)_ogg_calloc(1,sizeof(*ci->book_param[i]));
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   225
    if(vorbis_staticbook_unpack(opb,ci->book_param[i]))goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   226
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   227
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   228
  /* time backend settings */
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koda
parents:
diff changeset
   229
  ci->times=oggpack_read(opb,6)+1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   230
  /*ci->time_type=_ogg_malloc(ci->times*sizeof(*ci->time_type));*/
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koda
parents:
diff changeset
   231
  /*ci->time_param=_ogg_calloc(ci->times,sizeof(void *));*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   232
  for(i=0;i<ci->times;i++){
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koda
parents:
diff changeset
   233
    ci->time_type[i]=oggpack_read(opb,16);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   234
    if(ci->time_type[i]<0 || ci->time_type[i]>=VI_TIMEB)goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   235
    /* ci->time_param[i]=_time_P[ci->time_type[i]]->unpack(vi,opb);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   236
       Vorbis I has no time backend */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
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diff changeset
   237
    /*if(!ci->time_param[i])goto err_out;*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   238
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   239
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   240
  /* floor backend settings */
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koda
parents:
diff changeset
   241
  ci->floors=oggpack_read(opb,6)+1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   242
  /*ci->floor_type=_ogg_malloc(ci->floors*sizeof(*ci->floor_type));*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   243
  /*ci->floor_param=_ogg_calloc(ci->floors,sizeof(void *));*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   244
  for(i=0;i<ci->floors;i++){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   245
    ci->floor_type[i]=oggpack_read(opb,16);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   246
    if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   247
    ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   248
    if(!ci->floor_param[i])goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   249
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
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diff changeset
   250
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
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diff changeset
   251
  /* residue backend settings */
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koda
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diff changeset
   252
  ci->residues=oggpack_read(opb,6)+1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   253
  /*ci->residue_type=_ogg_malloc(ci->residues*sizeof(*ci->residue_type));*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   254
  /*ci->residue_param=_ogg_calloc(ci->residues,sizeof(void *));*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   255
  for(i=0;i<ci->residues;i++){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   256
    ci->residue_type[i]=oggpack_read(opb,16);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   257
    if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   258
    ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   259
    if(!ci->residue_param[i])goto err_out;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   260
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   261
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   262
  /* map backend settings */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   263
  ci->maps=oggpack_read(opb,6)+1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   264
  /*ci->map_type=_ogg_malloc(ci->maps*sizeof(*ci->map_type));*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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   265
  /*ci->map_param=_ogg_calloc(ci->maps,sizeof(void *));*/
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   266
  for(i=0;i<ci->maps;i++){
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   267
    ci->map_type[i]=oggpack_read(opb,16);
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   268
    if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out;
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   269
    ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb);
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    if(!ci->map_param[i])goto err_out;
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   271
  }
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  /* mode settings */
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  ci->modes=oggpack_read(opb,6)+1;
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  /*vi->mode_param=_ogg_calloc(vi->modes,sizeof(void *));*/
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  for(i=0;i<ci->modes;i++){
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    ci->mode_param[i]=(vorbis_info_mode *)_ogg_calloc(1,sizeof(*ci->mode_param[i]));
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    ci->mode_param[i]->blockflag=oggpack_read(opb,1);
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   279
    ci->mode_param[i]->windowtype=oggpack_read(opb,16);
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    ci->mode_param[i]->transformtype=oggpack_read(opb,16);
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    ci->mode_param[i]->mapping=oggpack_read(opb,8);
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    if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out;
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   284
    if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out;
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   285
    if(ci->mode_param[i]->mapping>=ci->maps)goto err_out;
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   286
  }
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  if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */
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   289
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  return(0);
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   291
 err_out:
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  vorbis_info_clear(vi);
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   293
  return(OV_EBADHEADER);
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   294
}
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   295
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/* The Vorbis header is in three packets; the initial small packet in
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   the first page that identifies basic parameters, a second packet
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   with bitstream comments and a third packet that holds the
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   codebook. */
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int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
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   302
  oggpack_buffer opb;
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diff changeset
   303
  
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   304
  if(op){
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   305
    oggpack_readinit(&opb,op->packet);
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   306
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   307
    /* Which of the three types of header is this? */
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   308
    /* Also verify header-ness, vorbis */
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   309
    {
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   310
      char buffer[6];
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   311
      int packtype=oggpack_read(&opb,8);
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   312
      memset(buffer,0,6);
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   313
      _v_readstring(&opb,buffer,6);
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diff changeset
   314
      if(memcmp(buffer,"vorbis",6)){
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   315
	/* not a vorbis header */
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   316
	return(OV_ENOTVORBIS);
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diff changeset
   317
      }
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diff changeset
   318
      switch(packtype){
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diff changeset
   319
      case 0x01: /* least significant *bit* is read first */
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diff changeset
   320
	if(!op->b_o_s){
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   321
	  /* Not the initial packet */
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   322
	  return(OV_EBADHEADER);
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diff changeset
   323
	}
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   324
	if(vi->rate!=0){
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   325
	  /* previously initialized info header */
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koda
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   326
	  return(OV_EBADHEADER);
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diff changeset
   327
	}
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koda
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diff changeset
   328
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   329
	return(_vorbis_unpack_info(vi,&opb));
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diff changeset
   330
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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diff changeset
   331
      case 0x03: /* least significant *bit* is read first */
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diff changeset
   332
	if(vi->rate==0){
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diff changeset
   333
	  /* um... we didn't get the initial header */
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   334
	  return(OV_EBADHEADER);
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koda
parents:
diff changeset
   335
	}
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parents:
diff changeset
   336
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   337
	return(_vorbis_unpack_comment(vc,&opb));
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diff changeset
   338
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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diff changeset
   339
      case 0x05: /* least significant *bit* is read first */
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koda
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diff changeset
   340
	if(vi->rate==0 || vc->vendor==NULL){
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parents:
diff changeset
   341
	  /* um... we didn;t get the initial header or comments yet */
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   342
	  return(OV_EBADHEADER);
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diff changeset
   343
	}
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   344
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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   345
	return(_vorbis_unpack_books(vi,&opb));
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koda
parents:
diff changeset
   346
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   347
      default:
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   348
	/* Not a valid vorbis header type */
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koda
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diff changeset
   349
	return(OV_EBADHEADER);
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parents:
diff changeset
   350
	break;
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koda
parents:
diff changeset
   351
      }
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koda
parents:
diff changeset
   352
    }
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koda
parents:
diff changeset
   353
  }
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koda
parents:
diff changeset
   354
  return(OV_EBADHEADER);
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koda
parents:
diff changeset
   355
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   356