File: info.c

package info (click to toggle)
libtheora 1.1.1+dfsg.1-15
  • links: PTS, VCS
  • area: main
  • in suites: buster, sid
  • size: 7,460 kB
  • sloc: ansic: 32,561; sh: 9,675; makefile: 744
file content (131 lines) | stat: -rw-r--r-- 3,966 bytes parent folder | download | duplicates (39)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggTheora 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 Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009                *
 * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
 *                                                                  *
 ********************************************************************

  function:
    last mod: $Id: info.c 16503 2009-08-22 18:14:02Z giles $

 ********************************************************************/

#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "internal.h"



/*This is more or less the same as strncasecmp, but that doesn't exist
   everywhere, and this is a fairly trivial function, so we include it.
  Note: We take advantage of the fact that we know _n is less than or equal to
   the length of at least one of the strings.*/
static int oc_tagcompare(const char *_s1,const char *_s2,int _n){
  int c;
  for(c=0;c<_n;c++){
    if(toupper(_s1[c])!=toupper(_s2[c]))return !0;
  }
  return _s1[c]!='=';
}



void th_info_init(th_info *_info){
  memset(_info,0,sizeof(*_info));
  _info->version_major=TH_VERSION_MAJOR;
  _info->version_minor=TH_VERSION_MINOR;
  _info->version_subminor=TH_VERSION_SUB;
  _info->keyframe_granule_shift=6;
}

void th_info_clear(th_info *_info){
  memset(_info,0,sizeof(*_info));
}



void th_comment_init(th_comment *_tc){
  memset(_tc,0,sizeof(*_tc));
}

void th_comment_add(th_comment *_tc,char *_comment){
  char **user_comments;
  int   *comment_lengths;
  int    comment_len;
  user_comments=_ogg_realloc(_tc->user_comments,
   (_tc->comments+2)*sizeof(*_tc->user_comments));
  if(user_comments==NULL)return;
  _tc->user_comments=user_comments;
  comment_lengths=_ogg_realloc(_tc->comment_lengths,
   (_tc->comments+2)*sizeof(*_tc->comment_lengths));
  if(comment_lengths==NULL)return;
  _tc->comment_lengths=comment_lengths;
  comment_len=strlen(_comment);
  comment_lengths[_tc->comments]=comment_len;
  user_comments[_tc->comments]=_ogg_malloc(comment_len+1);
  if(user_comments[_tc->comments]==NULL)return;
  memcpy(_tc->user_comments[_tc->comments],_comment,comment_len+1);
  _tc->comments++;
  _tc->user_comments[_tc->comments]=NULL;
}

void th_comment_add_tag(th_comment *_tc,char *_tag,char *_val){
  char *comment;
  int   tag_len;
  int   val_len;
  tag_len=strlen(_tag);
  val_len=strlen(_val);
  /*+2 for '=' and '\0'.*/
  comment=_ogg_malloc(tag_len+val_len+2);
  if(comment==NULL)return;
  memcpy(comment,_tag,tag_len);
  comment[tag_len]='=';
  memcpy(comment+tag_len+1,_val,val_len+1);
  th_comment_add(_tc,comment);
  _ogg_free(comment);
}

char *th_comment_query(th_comment *_tc,char *_tag,int _count){
  long i;
  int  found;
  int  tag_len;
  tag_len=strlen(_tag);
  found=0;
  for(i=0;i<_tc->comments;i++){
    if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len)){
      /*We return a pointer to the data, not a copy.*/
      if(_count==found++)return _tc->user_comments[i]+tag_len+1;
    }
  }
  /*Didn't find anything.*/
  return NULL;
}

int th_comment_query_count(th_comment *_tc,char *_tag){
  long i;
  int  tag_len;
  int  count;
  tag_len=strlen(_tag);
  count=0;
  for(i=0;i<_tc->comments;i++){
    if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len))count++;
  }
  return count;
}

void th_comment_clear(th_comment *_tc){
  if(_tc!=NULL){
    long i;
    for(i=0;i<_tc->comments;i++)_ogg_free(_tc->user_comments[i]);
    _ogg_free(_tc->user_comments);
    _ogg_free(_tc->comment_lengths);
    _ogg_free(_tc->vendor);
    memset(_tc,0,sizeof(*_tc));
  }
}