131 lines
5.5 KiB
Diff
131 lines
5.5 KiB
Diff
diff -up chromium-108.0.5359.124/AUTHORS.first_dts chromium-108.0.5359.124/AUTHORS
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--- chromium-108.0.5359.124/AUTHORS.first_dts 2022-12-31 15:30:52.923006393 +0100
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+++ chromium-108.0.5359.124/AUTHORS 2022-12-31 15:32:50.431215836 +0100
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@@ -97,6 +97,7 @@ Andra Paraschiv <andra.paraschiv@intel.c
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Andras Tokodi <a.tokodi@eyeo.com>
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Andreas Nazlidis <andreas221b@gmail.com>
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Andreas Papacharalampous <andreas@apap04.com>
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+Andreas Schneider <asn@cryptomilk.org>
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Andrei Borza <andrei.borza@gmail.com>
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Andrei Parvu <andrei.prv@gmail.com>
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Andrei Parvu <parvu@adobe.com>
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diff -up chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.cc.first_dts chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.cc
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--- chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.cc.first_dts 2022-12-14 01:39:52.000000000 +0100
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+++ chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.cc 2022-12-31 15:30:52.923006393 +0100
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@@ -58,7 +58,7 @@ namespace media {
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namespace {
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-constexpr int64_t kInvalidPTSMarker = static_cast<int64_t>(0x8000000000000000);
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+constexpr int64_t kRelativeTsBase = static_cast<int64_t>(0x7ffeffffffffffff);
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void SetAVStreamDiscard(AVStream* stream, AVDiscard discard) {
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DCHECK(stream);
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@@ -91,7 +91,7 @@ static base::TimeDelta FramesToTimeDelta
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sample_rate);
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}
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-static base::TimeDelta ExtractStartTime(AVStream* stream) {
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+static base::TimeDelta ExtractStartTime(AVStream* stream, int64_t first_dts) {
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// The default start time is zero.
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base::TimeDelta start_time;
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@@ -101,12 +101,12 @@ static base::TimeDelta ExtractStartTime(
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// Next try to use the first DTS value, for codecs where we know PTS == DTS
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// (excludes all H26x codecs). The start time must be returned in PTS.
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- if (av_stream_get_first_dts(stream) != kNoFFmpegTimestamp &&
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+ if (first_dts != AV_NOPTS_VALUE &&
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stream->codecpar->codec_id != AV_CODEC_ID_HEVC &&
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stream->codecpar->codec_id != AV_CODEC_ID_H264 &&
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stream->codecpar->codec_id != AV_CODEC_ID_MPEG4) {
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const base::TimeDelta first_pts =
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- ConvertFromTimeBase(stream->time_base, av_stream_get_first_dts(stream));
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+ ConvertFromTimeBase(stream->time_base, first_dts);
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if (first_pts < start_time)
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start_time = first_pts;
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}
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@@ -275,6 +275,7 @@ FFmpegDemuxerStream::FFmpegDemuxerStream
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fixup_negative_timestamps_(false),
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fixup_chained_ogg_(false),
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num_discarded_packet_warnings_(0),
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+ first_dts_(AV_NOPTS_VALUE),
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last_packet_pos_(AV_NOPTS_VALUE),
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last_packet_dts_(AV_NOPTS_VALUE) {
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DCHECK(demuxer_);
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@@ -341,6 +342,11 @@ void FFmpegDemuxerStream::EnqueuePacket(
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int64_t packet_dts =
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packet->dts == AV_NOPTS_VALUE ? packet->pts : packet->dts;
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+ if (first_dts_ == AV_NOPTS_VALUE && packet->dts != AV_NOPTS_VALUE &&
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+ last_packet_dts_ != AV_NOPTS_VALUE) {
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+ first_dts_ = packet->dts - (last_packet_dts_ + kRelativeTsBase);
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+ }
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+
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// Chained ogg files have non-monotonically increasing position and time stamp
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// values, which prevents us from using them to determine if a packet should
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// be dropped. Since chained ogg is only allowed on single track audio only
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@@ -683,6 +689,7 @@ void FFmpegDemuxerStream::FlushBuffers(b
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ResetBitstreamConverter();
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if (!preserve_packet_position) {
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+ first_dts_ = AV_NOPTS_VALUE;
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last_packet_pos_ = AV_NOPTS_VALUE;
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last_packet_dts_ = AV_NOPTS_VALUE;
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}
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@@ -1434,7 +1441,8 @@ void FFmpegDemuxer::OnFindStreamInfoDone
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max_duration = std::max(max_duration, streams_[i]->duration());
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- base::TimeDelta start_time = ExtractStartTime(stream);
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+ base::TimeDelta start_time =
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+ ExtractStartTime(stream, streams_[i]->first_dts());
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// Note: This value is used for seeking, so we must take the true value and
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// not the one possibly clamped to zero below.
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@@ -1591,7 +1599,7 @@ FFmpegDemuxerStream* FFmpegDemuxer::Find
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for (const auto& stream : streams_) {
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if (!stream || stream->IsEnabled() != enabled)
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continue;
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- if (av_stream_get_first_dts(stream->av_stream()) == kInvalidPTSMarker)
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+ if (stream->first_dts() == AV_NOPTS_VALUE)
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continue;
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if (!lowest_start_time_stream ||
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stream->start_time() < lowest_start_time_stream->start_time()) {
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@@ -1612,7 +1620,7 @@ FFmpegDemuxerStream* FFmpegDemuxer::Find
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if (stream->type() != DemuxerStream::VIDEO)
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continue;
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- if (av_stream_get_first_dts(stream->av_stream()) == kInvalidPTSMarker)
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+ if (stream->first_dts() == AV_NOPTS_VALUE)
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continue;
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if (!stream->IsEnabled())
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@@ -1926,4 +1934,4 @@ void FFmpegDemuxer::RunPendingSeekCB(Pip
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std::move(pending_seek_cb_).Run(status);
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}
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-} // namespace media
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+} // namespace media
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\ Kein Zeilenumbruch am Dateiende.
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diff -up chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.h.first_dts chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.h
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--- chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.h.first_dts 2022-12-14 01:39:52.000000000 +0100
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+++ chromium-108.0.5359.124/media/filters/ffmpeg_demuxer.h 2022-12-31 15:30:52.924006403 +0100
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@@ -145,6 +145,8 @@ class MEDIA_EXPORT FFmpegDemuxerStream :
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base::TimeDelta start_time() const { return start_time_; }
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void set_start_time(base::TimeDelta time) { start_time_ = time; }
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+ int64_t first_dts() const { return first_dts_; }
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+
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private:
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friend class FFmpegDemuxerTest;
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@@ -202,6 +204,7 @@ class MEDIA_EXPORT FFmpegDemuxerStream :
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bool fixup_chained_ogg_;
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int num_discarded_packet_warnings_;
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+ int64_t first_dts_;
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int64_t last_packet_pos_;
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int64_t last_packet_dts_;
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};
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