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avformat/mpegenc: Avoid adding invalid packet to queue 

Do this by moving the check before the allocation.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2021-02-15 03:44:52 +01:00
parent 54987a37da
commit 4294f64d57
1 changed files with 12 additions and 12 deletions
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24
libavformat/mpegenc.c
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@ -1179,18 +1179,6 @@ static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
av_log(ctx, AV_LOG_TRACE, "dts:%f pts:%f flags:%d stream:%d nopts:%d\n",
dts / 90000.0, pts / 90000.0, pkt->flags,
pkt->stream_index, pts != AV_NOPTS_VALUE);
pkt_desc = av_mallocz(sizeof(PacketDesc));
if (!pkt_desc)
return AVERROR(ENOMEM);
if (!stream->predecode_packet) {
stream->predecode_packet = pkt_desc;
} else
stream->last_packet->next = pkt_desc;
stream->last_packet = pkt_desc;
if (!stream->premux_packet)
stream->premux_packet = pkt_desc;
pkt_desc->pts = pts;
pkt_desc->dts = dts;
if (st->codecpar->codec_id == AV_CODEC_ID_PCM_DVD) {
if (size < 3) {
@ -1204,6 +1192,18 @@ static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
size -= 3;
}
pkt_desc = av_mallocz(sizeof(PacketDesc));
if (!pkt_desc)
return AVERROR(ENOMEM);
if (!stream->predecode_packet) {
stream->predecode_packet = pkt_desc;
} else
stream->last_packet->next = pkt_desc;
stream->last_packet = pkt_desc;
if (!stream->premux_packet)
stream->premux_packet = pkt_desc;
pkt_desc->pts = pts;
pkt_desc->dts = dts;
pkt_desc->unwritten_size =
pkt_desc->size = size;