• file
• revisions
• annotate
• diff
• comparison
• raw

media/libtheora/lib/info.c@6474c204b198 (annotated)

media/libtheora/lib/info.c

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/********************************************************************
michael@0	2	* *
michael@0	3	* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
michael@0	4	* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
michael@0	5	* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
michael@0	6	* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
michael@0	7	* *
michael@0	8	* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
michael@0	9	* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
michael@0	10	* *
michael@0	11	********************************************************************
michael@0	12
michael@0	13	function:
michael@0	14	last mod: $Id: info.c 16503 2009-08-22 18:14:02Z giles $
michael@0	15
michael@0	16	********************************************************************/
michael@0	17
michael@0	18	#include <stdlib.h>
michael@0	19	#include <ctype.h>
michael@0	20	#include <string.h>
michael@0	21	#include "internal.h"
michael@0	22
michael@0	23
michael@0	24
michael@0	25	/*This is more or less the same as strncasecmp, but that doesn't exist
michael@0	26	everywhere, and this is a fairly trivial function, so we include it.
michael@0	27	Note: We take advantage of the fact that we know _n is less than or equal to
michael@0	28	the length of at least one of the strings.*/
michael@0	29	static int oc_tagcompare(const char *_s1,const char *_s2,int _n){
michael@0	30	int c;
michael@0	31	for(c=0;c<_n;c++){
michael@0	32	if(toupper(_s1[c])!=toupper(_s2[c]))return !0;
michael@0	33	}
michael@0	34	return _s1[c]!='=';
michael@0	35	}
michael@0	36
michael@0	37
michael@0	38
michael@0	39	void th_info_init(th_info *_info){
michael@0	40	memset(_info,0,sizeof(*_info));
michael@0	41	_info->version_major=TH_VERSION_MAJOR;
michael@0	42	_info->version_minor=TH_VERSION_MINOR;
michael@0	43	_info->version_subminor=TH_VERSION_SUB;
michael@0	44	_info->keyframe_granule_shift=6;
michael@0	45	}
michael@0	46
michael@0	47	void th_info_clear(th_info *_info){
michael@0	48	memset(_info,0,sizeof(*_info));
michael@0	49	}
michael@0	50
michael@0	51
michael@0	52
michael@0	53	void th_comment_init(th_comment *_tc){
michael@0	54	memset(_tc,0,sizeof(*_tc));
michael@0	55	}
michael@0	56
michael@0	57	void th_comment_add(th_comment *_tc,char *_comment){
michael@0	58	char **user_comments;
michael@0	59	int *comment_lengths;
michael@0	60	int comment_len;
michael@0	61	user_comments=_ogg_realloc(_tc->user_comments,
michael@0	62	(_tc->comments+2)*sizeof(*_tc->user_comments));
michael@0	63	if(user_comments==NULL)return;
michael@0	64	_tc->user_comments=user_comments;
michael@0	65	comment_lengths=_ogg_realloc(_tc->comment_lengths,
michael@0	66	(_tc->comments+2)*sizeof(*_tc->comment_lengths));
michael@0	67	if(comment_lengths==NULL)return;
michael@0	68	_tc->comment_lengths=comment_lengths;
michael@0	69	comment_len=strlen(_comment);
michael@0	70	comment_lengths[_tc->comments]=comment_len;
michael@0	71	user_comments[_tc->comments]=_ogg_malloc(comment_len+1);
michael@0	72	if(user_comments[_tc->comments]==NULL)return;
michael@0	73	memcpy(_tc->user_comments[_tc->comments],_comment,comment_len+1);
michael@0	74	_tc->comments++;
michael@0	75	_tc->user_comments[_tc->comments]=NULL;
michael@0	76	}
michael@0	77
michael@0	78	void th_comment_add_tag(th_comment *_tc,char *_tag,char *_val){
michael@0	79	char *comment;
michael@0	80	int tag_len;
michael@0	81	int val_len;
michael@0	82	tag_len=strlen(_tag);
michael@0	83	val_len=strlen(_val);
michael@0	84	/*+2 for '=' and '\0'.*/
michael@0	85	comment=_ogg_malloc(tag_len+val_len+2);
michael@0	86	if(comment==NULL)return;
michael@0	87	memcpy(comment,_tag,tag_len);
michael@0	88	comment[tag_len]='=';
michael@0	89	memcpy(comment+tag_len+1,_val,val_len+1);
michael@0	90	th_comment_add(_tc,comment);
michael@0	91	_ogg_free(comment);
michael@0	92	}
michael@0	93
michael@0	94	char *th_comment_query(th_comment *_tc,char *_tag,int _count){
michael@0	95	long i;
michael@0	96	int found;
michael@0	97	int tag_len;
michael@0	98	tag_len=strlen(_tag);
michael@0	99	found=0;
michael@0	100	for(i=0;i<_tc->comments;i++){
michael@0	101	if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len)){
michael@0	102	/*We return a pointer to the data, not a copy.*/
michael@0	103	if(_count==found++)return _tc->user_comments[i]+tag_len+1;
michael@0	104	}
michael@0	105	}
michael@0	106	/*Didn't find anything.*/
michael@0	107	return NULL;
michael@0	108	}
michael@0	109
michael@0	110	int th_comment_query_count(th_comment *_tc,char *_tag){
michael@0	111	long i;
michael@0	112	int tag_len;
michael@0	113	int count;
michael@0	114	tag_len=strlen(_tag);
michael@0	115	count=0;
michael@0	116	for(i=0;i<_tc->comments;i++){
michael@0	117	if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len))count++;
michael@0	118	}
michael@0	119	return count;
michael@0	120	}
michael@0	121
michael@0	122	void th_comment_clear(th_comment *_tc){
michael@0	123	if(_tc!=NULL){
michael@0	124	long i;
michael@0	125	for(i=0;i<_tc->comments;i++)_ogg_free(_tc->user_comments[i]);
michael@0	126	_ogg_free(_tc->user_comments);
michael@0	127	_ogg_free(_tc->comment_lengths);
michael@0	128	_ogg_free(_tc->vendor);
michael@0	129	memset(_tc,0,sizeof(*_tc));
michael@0	130	}
michael@0	131	}