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Code Issues Releases Activity

Validate AVCodecTag vs CodecID.

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Patch by Francesco Lavra, francescolavra interfree it

Originally committed as revision 23159 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Francesco Lavra 2010-05-18 19:23:29 +00:00 committed by Carl Eugen Hoyos
parent 603a5f04b2
commit 698f4cc7f0
1 changed files with 39 additions and 5 deletions
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44
libavformat/utils.c
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@ -2573,6 +2573,39 @@ int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
return 0;
}
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
{
const AVCodecTag *avctag;
int n;
enum CodecID id = CODEC_ID_NONE;
unsigned int tag = 0;
/**
* Check that tag + id is in the table
* If neither is in the table -> OK
* If tag is in the table with another id -> FAIL
* If id is in the table with another tag -> FAIL unless strict < normal
*/
for (n = 0; s->oformat->codec_tag[n]; n++) {
avctag = s->oformat->codec_tag[n];
while (avctag->id != CODEC_ID_NONE) {
if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
id = avctag->id;
if (id == st->codec->codec_id)
return 1;
}
if (avctag->id == st->codec->codec_id)
tag = avctag->tag;
avctag++;
}
}
if (id != CODEC_ID_NONE)
return 0;
if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
return 0;
return 1;
}
int av_write_header(AVFormatContext *s)
{
int ret, i;
@ -2615,11 +2648,12 @@ int av_write_header(AVFormatContext *s)
if(s->oformat->codec_tag){
if(st->codec->codec_tag){
//FIXME
//check that tag + id is in the table
//if neither is in the table -> OK
//if tag is in the table with another id -> FAIL
//if id is in the table with another tag -> FAIL unless strict < ?
if (!validate_codec_tag(s, st)) {
av_log(s, AV_LOG_ERROR,
"Tag 0x%08x incompatible with output codec\n",
st->codec->codec_tag);
return AVERROR_INVALIDDATA;
}
}else
st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
}