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Code Issues Releases Activity

Revise check for codec id in voc demuxer.

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This fixes demuxing of packets that do not contain a codec tag and come before the codec_id has been set.
This commit is contained in:
Justin Ruggles 2011-01-18 12:25:44 -05:00
parent 1ae02fe03b
commit f61cbc22d3
1 changed files with 16 additions and 13 deletions
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29
libavformat/vocdec.c
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@ -68,7 +68,7 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
AVCodecContext *dec = st->codec;
ByteIOContext *pb = s->pb;
VocType type;
int size, tmp_codec;
int size, tmp_codec=-1;
int sample_rate = 0;
int channels = 1;
@ -90,11 +90,7 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
if (sample_rate)
dec->sample_rate = sample_rate;
dec->channels = channels;
tmp_codec = ff_codec_get_id(ff_voc_codec_tags, get_byte(pb));
if (dec->codec_id == CODEC_ID_NONE)
dec->codec_id = tmp_codec;
else if (dec->codec_id != tmp_codec)
av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
tmp_codec = get_byte(pb);
dec->bits_per_coded_sample = av_get_bits_per_sample(dec->codec_id);
voc->remaining_size -= 2;
max_size -= 2;
@ -117,11 +113,7 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
dec->sample_rate = get_le32(pb);
dec->bits_per_coded_sample = get_byte(pb);
dec->channels = get_byte(pb);
tmp_codec = ff_codec_get_id(ff_voc_codec_tags, get_le16(pb));
if (dec->codec_id == CODEC_ID_NONE)
dec->codec_id = tmp_codec;
else if (dec->codec_id != tmp_codec)
av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
tmp_codec = get_le16(pb);
url_fskip(pb, 4);
voc->remaining_size -= 12;
max_size -= 12;
@ -133,9 +125,20 @@ voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
voc->remaining_size = 0;
break;
}
}
if (tmp_codec >= 0) {
tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec);
if (dec->codec_id == CODEC_ID_NONE)
dec->codec_id = tmp_codec;
else if (dec->codec_id != tmp_codec)
av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
if (dec->codec_id == CODEC_ID_NONE) {
av_log(s, AV_LOG_ERROR, "Invalid codec_id\n");
if (s->audio_codec_id == CODEC_ID_NONE) return AVERROR(EINVAL);
if (s->audio_codec_id == CODEC_ID_NONE) {
av_log(s, AV_LOG_ERROR, "unknown codec tag\n");
return AVERROR(EINVAL);
}
av_log(s, AV_LOG_WARNING, "unknown codec tag\n");
}
}