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avformat/dvenc: check the format before vst and ast[i] are initialized 

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
This commit is contained in:
Limin Wang 2020-08-27 23:40:02 +08:00
parent da0faf10a3
commit 3871326910
1 changed files with 12 additions and 13 deletions
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25
libavformat/dvenc.c
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@ -311,10 +311,20 @@ static DVMuxContext* dv_init_mux(AVFormatContext* s)
switch (st->codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (vst) return NULL;
if (st->codecpar->codec_id != AV_CODEC_ID_DVVIDEO)
goto bail_out;
vst = st;
break;
case AVMEDIA_TYPE_AUDIO:
if (c->n_ast > 1) return NULL;
/* Some checks -- DV format is very picky about its incoming streams */
if(st->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE ||
st->codecpar->channels != 2)
goto bail_out;
if (st->codecpar->sample_rate != 48000 &&
st->codecpar->sample_rate != 44100 &&
st->codecpar->sample_rate != 32000 )
goto bail_out;
c->ast[c->n_ast++] = st;
break;
default:
@ -322,20 +332,9 @@ static DVMuxContext* dv_init_mux(AVFormatContext* s)
}
}
/* Some checks -- DV format is very picky about its incoming streams */
if (!vst || vst->codecpar->codec_id != AV_CODEC_ID_DVVIDEO)
if (!vst)
goto bail_out;
for (i=0; i<c->n_ast; i++) {
if (c->ast[i]) {
if(c->ast[i]->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE ||
c->ast[i]->codecpar->channels != 2)
goto bail_out;
if (c->ast[i]->codecpar->sample_rate != 48000 &&
c->ast[i]->codecpar->sample_rate != 44100 &&
c->ast[i]->codecpar->sample_rate != 32000 )
goto bail_out;
}
}
c->sys = av_dv_codec_profile2(vst->codecpar->width, vst->codecpar->height,
vst->codecpar->format, vst->time_base);
if (!c->sys)