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-rw-r--r--media/libtheora/lib/info.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/media/libtheora/lib/info.c b/media/libtheora/lib/info.c
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index 000000000..6b9762978
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+++ b/media/libtheora/lib/info.c
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+/********************************************************************
+ * *
+ * 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));
+ }
+}