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avformat/mux: Store pointer to interleavement func in FFFormatContext

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It avoids branches lateron and will allow to easily avoid the overhead
of the linked list currently in use in case there is only one stream.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-10-09 16:13:32 +02:00
parent 3188b606d7
commit c03e53aea7
2 changed files with 11 additions and 14 deletions
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6
libavformat/internal.h
View File

@ -81,6 +81,12 @@ typedef struct FFFormatContext {
*/
int nb_interleaved_streams;
/**
* The interleavement function in use. Always set for muxers.
*/
int (*interleave_packet)(struct AVFormatContext *s, AVPacket *pkt,
int flush, int has_packet);
/**
* This buffer is only needed when packets were already buffered but
* not decoded, for example to get the codec parameters in MPEG

19
libavformat/mux.c
View File

@ -334,6 +334,9 @@ static int init_muxer(AVFormatContext *s, AVDictionary **options)
if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
si->nb_interleaved_streams++;
}
si->interleave_packet = of->interleave_packet;
if (!si->interleave_packet)
si->interleave_packet = ff_interleave_packet_per_dts;
if (!s->priv_data && of->priv_data_size > 0) {
s->priv_data = av_mallocz(of->priv_data_size);
@ -1054,19 +1057,6 @@ const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream)
return NULL;
}
/**
* A wrapper around AVOutputFormat.interleave_packet.
* See its documentation for details.
*/
static int interleave_packet(AVFormatContext *s, AVPacket *pkt,
int flush, int has_packet)
{
if (s->oformat->interleave_packet) {
return s->oformat->interleave_packet(s, pkt, flush, has_packet);
} else
return ff_interleave_packet_per_dts(s, pkt, flush, has_packet);
}
static int check_bitstream(AVFormatContext *s, FFStream *sti, AVPacket *pkt)
{
int ret;
@ -1089,8 +1079,9 @@ static int check_bitstream(AVFormatContext *s, FFStream *sti, AVPacket *pkt)
static int interleaved_write_packet(AVFormatContext *s, AVPacket *pkt,
int flush, int has_packet)
{
FFFormatContext *const si = ffformatcontext(s);
for (;; ) {
int ret = interleave_packet(s, pkt, flush, has_packet);
int ret = si->interleave_packet(s, pkt, flush, has_packet);
if (ret <= 0)
return ret;