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avformat: make flush_packets a tri-state and set it to -1 (auto) by default

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If flushing is not disabled, then mux.c will signal the end of the packets with
an AVIO_DATA_MARKER_FLUSH_POINT, and aviobuf will be able to decide to flush or
not based on the preferred minimum packet size set by the used protocol.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
2017-06-04 04:19:33 +02:00
parent 09891c5391
commit eeeb595c7f
3 changed files with 19 additions and 11 deletions
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19
libavformat/mux.c
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@@ -468,6 +468,16 @@ static int init_pts(AVFormatContext *s)
return 0;
}
static void flush_if_needed(AVFormatContext *s)
{
if (s->pb && s->pb->error >= 0) {
if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
avio_flush(s->pb);
else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
}
}
static int write_header_internal(AVFormatContext *s)
{
if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
@@ -479,8 +489,7 @@ static int write_header_internal(AVFormatContext *s)
s->internal->write_header_ret = ret;
if (ret < 0)
return ret;
if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
avio_flush(s->pb);
flush_if_needed(s);
}
s->internal->header_written = 1;
if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
@@ -772,8 +781,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
if (s->pb && ret >= 0) {
if (s->flush_packets && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
avio_flush(s->pb);
flush_if_needed(s);
if (s->pb->error < 0)
ret = s->pb->error;
}
@@ -932,8 +940,7 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt)
return ret;
}
ret = s->oformat->write_packet(s, NULL);
if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
avio_flush(s->pb);
flush_if_needed(s);
if (ret >= 0 && s->pb && s->pb->error < 0)
ret = s->pb->error;
return ret;