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mkv: Refactor mkv_write_packet 

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Luca Barbato 2013-08-18 20:09:39 +02:00
parent 9a27acae9e
commit 148fbdd1c2
1 changed files with 32 additions and 10 deletions
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42
libavformat/matroskaenc.c
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@ -1264,20 +1264,42 @@ static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
{
MatroskaMuxContext *mkv = s->priv_data;
AVIOContext *pb = s->pb->seekable ? s->pb : mkv->dyn_bc;
AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
int ret, keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
int cluster_size = avio_tell(pb) - (s->pb->seekable ? mkv->cluster_pos : 0);
int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
int cluster_size;
int cluster_size_limit;
int64_t cluster_time;
int64_t cluster_time_limit;
AVIOContext *pb;
int ret;
if (mkv->tracks[pkt->stream_index].write_dts)
cluster_time = pkt->dts - mkv->cluster_pts;
else
cluster_time = pkt->pts - mkv->cluster_pts;
// start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
// after 4k and on a keyframe
if (s->pb->seekable) {
pb = s->pb;
cluster_size = avio_tell(pb) - mkv->cluster_pos;
cluster_time_limit = 5000;
cluster_size_limit = 5 * 1024 * 1024;
} else {
pb = mkv->dyn_bc;
cluster_size = avio_tell(pb);
cluster_time_limit = 1000;
cluster_size_limit = 32 * 1024;
}
if (mkv->cluster_pos &&
((!s->pb->seekable && (cluster_size > 32*1024 || ts > mkv->cluster_pts + 1000))
|| cluster_size > 5*1024*1024 || ts > mkv->cluster_pts + 5000
|| (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe && cluster_size > 4*1024))) {
(cluster_size > cluster_size_limit ||
cluster_time > cluster_time_limit ||
(codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
cluster_size > 4 * 1024))) {
av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
" bytes, pts %" PRIu64 "\n", avio_tell(pb), ts);
" bytes, pts %" PRIu64 "dts %" PRIu64 "\n",
avio_tell(pb), pkt->pts, pkt->dts);
end_ebml_master(pb, mkv->cluster);
mkv->cluster_pos = 0;
if (mkv->dyn_bc)
@ -1296,7 +1318,7 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
// buffer an audio packet to ensure the packet containing the video
// keyframe's timecode is contained in the same cluster for WebM
if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
if (codec_type == AVMEDIA_TYPE_AUDIO) {
mkv->cur_audio_pkt = *pkt;
if (pkt->buf) {
mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);