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libavformat/utils: only run delta_dts_min calculation code when its value is used.

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This should improve speed.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-09-07 00:23:18 +02:00
parent effbeff503
commit 9243454e31
1 changed files with 20 additions and 16 deletions
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36
libavformat/utils.c
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@ -3230,28 +3230,32 @@ int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pk
for(i=0; i < s->nb_streams; i++) {
if (s->streams[i]->last_in_packet_buffer) {
int64_t delta_dts =
av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
s->streams[i]->time_base,
AV_TIME_BASE_Q) -
av_rescale_q(s->packet_buffer->pkt.dts,
s->streams[s->packet_buffer->pkt.stream_index]->time_base,
AV_TIME_BASE_Q);
delta_dts_min = FFMIN(delta_dts_min, delta_dts);
++stream_count;
} else {
if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
++noninterleaved_count;
} else if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
++noninterleaved_count;
}
}
if (s->nb_streams == stream_count) {
flush = 1;
} else if (!flush &&
s->nb_streams == stream_count+noninterleaved_count &&
delta_dts_min > 20*AV_TIME_BASE) {
av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
flush = 1;
} else if (!flush){
for(i=0; i < s->nb_streams; i++) {
if (s->streams[i]->last_in_packet_buffer) {
int64_t delta_dts =
av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
s->streams[i]->time_base,
AV_TIME_BASE_Q) -
av_rescale_q(s->packet_buffer->pkt.dts,
s->streams[s->packet_buffer->pkt.stream_index]->time_base,
AV_TIME_BASE_Q);
delta_dts_min = FFMIN(delta_dts_min, delta_dts);
}
}
if(s->nb_streams == stream_count+noninterleaved_count &&
delta_dts_min > 20*AV_TIME_BASE) {
av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
flush = 1;
}
}
if(stream_count && flush){
pktl= s->packet_buffer;