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avformat/dashenc: use local variable and avoid calculate duration multiple times

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Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
This commit is contained in:
Limin Wang 2020-04-26 17:49:19 +08:00 committed by Karthick J
parent 839d024fab
commit 759565ccf8
1 changed files with 5 additions and 9 deletions
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14
libavformat/dashenc.c
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@ -1916,6 +1916,7 @@ static int dash_flush(AVFormatContext *s, int final, int stream)
OutputStream *os = &c->streams[i];
AVStream *st = s->streams[i];
int range_length, index_length = 0;
int64_t duration;
if (!os->packets_written)
continue;
@ -1955,23 +1956,18 @@ static int dash_flush(AVFormatContext *s, int final, int stream)
}
}
os->last_duration = FFMAX(os->last_duration, av_rescale_q(os->max_pts - os->start_pts,
st->time_base,
AV_TIME_BASE_Q));
duration = av_rescale_q(os->max_pts - os->start_pts, st->time_base, AV_TIME_BASE_Q);
os->last_duration = FFMAX(os->last_duration, duration);
if (!os->muxer_overhead && os->max_pts > os->start_pts)
os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
8 * AV_TIME_BASE) /
av_rescale_q(os->max_pts - os->start_pts,
st->time_base, AV_TIME_BASE_Q);
8 * AV_TIME_BASE) / duration;
os->total_pkt_size = 0;
os->total_pkt_duration = 0;
if (!os->bit_rate) {
// calculate average bitrate of first segment
int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts,
st->time_base,
AV_TIME_BASE_Q);
int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / duration;
if (bitrate >= 0)
os->bit_rate = bitrate;
}