1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libtheora/lib/info.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,131 @@
1.4 +/********************************************************************
1.5 + * *
1.6 + * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
1.7 + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
1.8 + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
1.9 + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
1.10 + * *
1.11 + * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
1.12 + * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
1.13 + * *
1.14 + ********************************************************************
1.15 +
1.16 + function:
1.17 + last mod: $Id: info.c 16503 2009-08-22 18:14:02Z giles $
1.18 +
1.19 + ********************************************************************/
1.20 +
1.21 +#include <stdlib.h>
1.22 +#include <ctype.h>
1.23 +#include <string.h>
1.24 +#include "internal.h"
1.25 +
1.26 +
1.27 +
1.28 +/*This is more or less the same as strncasecmp, but that doesn't exist
1.29 + everywhere, and this is a fairly trivial function, so we include it.
1.30 + Note: We take advantage of the fact that we know _n is less than or equal to
1.31 + the length of at least one of the strings.*/
1.32 +static int oc_tagcompare(const char *_s1,const char *_s2,int _n){
1.33 + int c;
1.34 + for(c=0;c<_n;c++){
1.35 + if(toupper(_s1[c])!=toupper(_s2[c]))return !0;
1.36 + }
1.37 + return _s1[c]!='=';
1.38 +}
1.39 +
1.40 +
1.41 +
1.42 +void th_info_init(th_info *_info){
1.43 + memset(_info,0,sizeof(*_info));
1.44 + _info->version_major=TH_VERSION_MAJOR;
1.45 + _info->version_minor=TH_VERSION_MINOR;
1.46 + _info->version_subminor=TH_VERSION_SUB;
1.47 + _info->keyframe_granule_shift=6;
1.48 +}
1.49 +
1.50 +void th_info_clear(th_info *_info){
1.51 + memset(_info,0,sizeof(*_info));
1.52 +}
1.53 +
1.54 +
1.55 +
1.56 +void th_comment_init(th_comment *_tc){
1.57 + memset(_tc,0,sizeof(*_tc));
1.58 +}
1.59 +
1.60 +void th_comment_add(th_comment *_tc,char *_comment){
1.61 + char **user_comments;
1.62 + int *comment_lengths;
1.63 + int comment_len;
1.64 + user_comments=_ogg_realloc(_tc->user_comments,
1.65 + (_tc->comments+2)*sizeof(*_tc->user_comments));
1.66 + if(user_comments==NULL)return;
1.67 + _tc->user_comments=user_comments;
1.68 + comment_lengths=_ogg_realloc(_tc->comment_lengths,
1.69 + (_tc->comments+2)*sizeof(*_tc->comment_lengths));
1.70 + if(comment_lengths==NULL)return;
1.71 + _tc->comment_lengths=comment_lengths;
1.72 + comment_len=strlen(_comment);
1.73 + comment_lengths[_tc->comments]=comment_len;
1.74 + user_comments[_tc->comments]=_ogg_malloc(comment_len+1);
1.75 + if(user_comments[_tc->comments]==NULL)return;
1.76 + memcpy(_tc->user_comments[_tc->comments],_comment,comment_len+1);
1.77 + _tc->comments++;
1.78 + _tc->user_comments[_tc->comments]=NULL;
1.79 +}
1.80 +
1.81 +void th_comment_add_tag(th_comment *_tc,char *_tag,char *_val){
1.82 + char *comment;
1.83 + int tag_len;
1.84 + int val_len;
1.85 + tag_len=strlen(_tag);
1.86 + val_len=strlen(_val);
1.87 + /*+2 for '=' and '\0'.*/
1.88 + comment=_ogg_malloc(tag_len+val_len+2);
1.89 + if(comment==NULL)return;
1.90 + memcpy(comment,_tag,tag_len);
1.91 + comment[tag_len]='=';
1.92 + memcpy(comment+tag_len+1,_val,val_len+1);
1.93 + th_comment_add(_tc,comment);
1.94 + _ogg_free(comment);
1.95 +}
1.96 +
1.97 +char *th_comment_query(th_comment *_tc,char *_tag,int _count){
1.98 + long i;
1.99 + int found;
1.100 + int tag_len;
1.101 + tag_len=strlen(_tag);
1.102 + found=0;
1.103 + for(i=0;i<_tc->comments;i++){
1.104 + if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len)){
1.105 + /*We return a pointer to the data, not a copy.*/
1.106 + if(_count==found++)return _tc->user_comments[i]+tag_len+1;
1.107 + }
1.108 + }
1.109 + /*Didn't find anything.*/
1.110 + return NULL;
1.111 +}
1.112 +
1.113 +int th_comment_query_count(th_comment *_tc,char *_tag){
1.114 + long i;
1.115 + int tag_len;
1.116 + int count;
1.117 + tag_len=strlen(_tag);
1.118 + count=0;
1.119 + for(i=0;i<_tc->comments;i++){
1.120 + if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len))count++;
1.121 + }
1.122 + return count;
1.123 +}
1.124 +
1.125 +void th_comment_clear(th_comment *_tc){
1.126 + if(_tc!=NULL){
1.127 + long i;
1.128 + for(i=0;i<_tc->comments;i++)_ogg_free(_tc->user_comments[i]);
1.129 + _ogg_free(_tc->user_comments);
1.130 + _ogg_free(_tc->comment_lengths);
1.131 + _ogg_free(_tc->vendor);
1.132 + memset(_tc,0,sizeof(*_tc));
1.133 + }
1.134 +}
