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https://github.com/LibreELEC/LibreELEC.tv
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70 lines
2.3 KiB
Diff
70 lines
2.3 KiB
Diff
From 95926a84fe1369f796c916f72c50dd5b7d50b15a Mon Sep 17 00:00:00 2001
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From: Joakim Plate <elupus@ecce.se>
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Date: Sat, 22 Oct 2011 19:01:38 +0200
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Subject: [PATCH 11/24] Get stream durations using read_timestamp
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---
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libavformat/utils.c | 39 +++++++++++++++++++++++++++++++++++++++
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1 file changed, 39 insertions(+)
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diff --git a/libavformat/utils.c b/libavformat/utils.c
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index ebb8493..25fe38e 100644
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--- a/libavformat/utils.c
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+++ b/libavformat/utils.c
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@@ -2082,6 +2082,41 @@ static void estimate_timings_from_bit_rate(AVFormatContext *ic)
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#define DURATION_MAX_READ_SIZE 250000
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#define DURATION_MAX_RETRY 3
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+static void av_estimate_timings_from_pts2(AVFormatContext *ic, int64_t old_offset)
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+{
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+ AVStream *st;
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+ int i, step= 1024;
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+ int64_t ts, pos;
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+
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+ for(i=0;i<ic->nb_streams;i++) {
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+ st = ic->streams[i];
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+
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+ pos = 0;
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+ ts = ic->iformat->read_timestamp(ic, i, &pos, DURATION_MAX_READ_SIZE);
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+ if (ts == AV_NOPTS_VALUE)
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+ continue;
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+ if (st->start_time > ts || st->start_time == AV_NOPTS_VALUE)
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+ st->start_time = ts;
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+
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+ pos = url_fsize(ic->pb) - 1;
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+ do {
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+ pos -= step;
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+ ts = ic->iformat->read_timestamp(ic, i, &pos, pos + step);
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+ step += step;
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+ } while (ts == AV_NOPTS_VALUE && pos >= step && step < DURATION_MAX_READ_SIZE);
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+
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+ if (ts == AV_NOPTS_VALUE)
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+ continue;
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+
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+ if (st->duration < ts - st->start_time || st->duration == AV_NOPTS_VALUE)
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+ st->duration = ts - st->start_time;
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+ }
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+
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+ fill_all_stream_timings(ic);
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+
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+ avio_seek(ic->pb, old_offset, SEEK_SET);
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+}
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+
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/* only usable for MPEG-PS streams */
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static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
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{
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@@ -2184,6 +2219,10 @@ static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
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/* at least one component has timings - we use them for all
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the components */
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fill_all_stream_timings(ic);
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+ } else if (ic->iformat->read_timestamp &&
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+ file_size && ic->pb->seekable) {
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+ /* get accurate estimate from the PTSes */
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+ av_estimate_timings_from_pts2(ic, old_offset);
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} else {
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av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
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/* less precise: use bitrate info */
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--
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1.7.9.4
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