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flv: Validate and reject unsupported codecs

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And provide a more informative message in case of failure.

CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2015-03-03 14:39:26 +01:00
parent 87e85a133f
commit e767c9e8f2
1 changed files with 17 additions and 16 deletions
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33
libavformat/flvenc.c
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@ -297,6 +297,17 @@ static void write_metadata(AVFormatContext *s, unsigned int ts)
avio_wb32(pb, data_size + 11);
}
static int unsupported_codec(AVFormatContext *s,
const char* type, int codec_id)
{
const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
av_log(s, AV_LOG_ERROR,
"%s codec %s not compatible with flv\n",
type,
desc ? desc->name : "unknown");
return AVERROR(ENOSYS);
}
static int flv_write_header(AVFormatContext *s)
{
int i;
@ -319,10 +330,8 @@ static int flv_write_header(AVFormatContext *s)
return AVERROR(EINVAL);
}
flv->video_enc = enc;
if (enc->codec_tag == 0) {
av_log(s, AV_LOG_ERROR, "video codec not compatible with flv\n");
return -1;
}
if (!ff_codec_get_tag(flv_video_codec_ids, enc->codec_id))
return unsupported_codec(s, "Video", enc->codec_id);
break;
case AVMEDIA_TYPE_AUDIO:
if (flv->audio_enc) {
@ -332,13 +341,11 @@ static int flv_write_header(AVFormatContext *s)
}
flv->audio_enc = enc;
if (get_audio_flags(s, enc) < 0)
return AVERROR_INVALIDDATA;
return unsupported_codec(s, "Audio", enc->codec_id);
break;
case AVMEDIA_TYPE_DATA:
if (enc->codec_id != AV_CODEC_ID_TEXT) {
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
return AVERROR_INVALIDDATA;
}
if (enc->codec_id != AV_CODEC_ID_TEXT)
return unsupported_codec(s, "Data", enc->codec_id);
flv->data_enc = enc;
break;
default:
@ -479,13 +486,7 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
case AVMEDIA_TYPE_VIDEO:
avio_w8(pb, FLV_TAG_TYPE_VIDEO);
flags = enc->codec_tag;
if (flags == 0) {
av_log(s, AV_LOG_ERROR,
"video codec %X not compatible with flv\n",
enc->codec_id);
return -1;
}
flags = ff_codec_get_tag(flv_video_codec_ids, enc->codec_id);
flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
break;