[FFmpeg-cvslog] avformat/matroskaenc: Don't needlessly copy AVCodecParameters
Andreas Rheinhardt
git at videolan.org
Tue Apr 21 09:36:13 EEST 2020
ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Wed Jan 22 20:03:15 2020 +0100| [75e50c3141c5e3f96110fcab5fb819736dcdc62e] | committer: Andreas Rheinhardt
avformat/matroskaenc: Don't needlessly copy AVCodecParameters
At the end of encoding, the FLAC encoder sends a packet whose side data
contains updated extradata (e.g. a correct md5 checksum). The Matroska
muxer uses this to update the CodecPrivate.
In doing so, the stream's codecpar was copied. But given that writing
a FLAC CodecPrivate does not modify the used AVCodecParameters at all,
there is no need to do so and this commit changes this.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=75e50c3141c5e3f96110fcab5fb819736dcdc62e
---
libavformat/matroskaenc.c | 16 ++++------------
1 file changed, 4 insertions(+), 12 deletions(-)
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index bdb768209d..71b6b6cc91 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -2173,24 +2173,16 @@ static int mkv_check_new_extra_data(AVFormatContext *s, const AVPacket *pkt)
break;
case AV_CODEC_ID_FLAC:
if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
- AVCodecParameters *codecpriv_par;
+ uint8_t *old_extradata = par->extradata;
if (side_data_size != par->extradata_size) {
av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
pkt->stream_index);
return AVERROR(EINVAL);
}
- codecpriv_par = avcodec_parameters_alloc();
- if (!codecpriv_par)
- return AVERROR(ENOMEM);
- ret = avcodec_parameters_copy(codecpriv_par, par);
- if (ret < 0) {
- avcodec_parameters_free(&codecpriv_par);
- return ret;
- }
- memcpy(codecpriv_par->extradata, side_data, side_data_size);
+ par->extradata = side_data;
avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
- mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
- avcodec_parameters_free(&codecpriv_par);
+ mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
+ par->extradata = old_extradata;
}
break;
// FIXME: Remove the following once libaom starts propagating extradata during init()
More information about the ffmpeg-cvslog
mailing list