diff options
Diffstat (limited to 'lib/info.c')
| -rw-r--r-- | lib/info.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/lib/info.c b/lib/info.c new file mode 100644 index 0000000..6b97629 --- /dev/null +++ b/lib/info.c @@ -0,0 +1,131 @@ +/******************************************************************** + * * + * 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)); + } +} |