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auenc: strict check for supported codec

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Also check number of streams and give error message why muxing failed.
This prevents muxing unsupported codec with known and supported tag.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-01-29 10:54:02 +00:00
parent 10e4905dd9
commit 0dcfccaa69
1 changed files with 9 additions and 1 deletions
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10
libavformat/au.c
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@ -156,8 +156,16 @@ static int au_write_header(AVFormatContext *s)
AVIOContext *pb = s->pb;
AVCodecContext *enc = s->streams[0]->codec;
if (!enc->codec_tag)
if (s->nb_streams != 1) {
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
return AVERROR(EINVAL);
}
enc->codec_tag = ff_codec_get_tag(codec_au_tags, enc->codec_id);
if (!enc->codec_tag) {
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
return AVERROR(EINVAL);
}
ffio_wfourcc(pb, ".snd"); /* magic number */
avio_wb32(pb, AU_HEADER_SIZE); /* header size */