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Correctly preserve first frame alpha in video streaming.

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This commit is contained in:
John Preston 2022-01-20 18:12:30 +03:00
parent 2e39befd7c
commit 079772a399
2 changed files with 9 additions and 3 deletions
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10
Telegram/SourceFiles/media/streaming/media_streaming_video_track.cpp
View file

@ -611,6 +611,8 @@ bool VideoTrackObject::processFirstFrame() {
if (_stream.frame->width * _stream.frame->height > kMaxFrameArea) {
return false;
}
const auto alpha = (_stream.frame->format == AV_PIX_FMT_BGRA)
|| (_stream.frame->format == AV_PIX_FMT_YUVA420P);
auto frame = ConvertFrame(
_stream,
_stream.frame.get(),
@ -619,7 +621,7 @@ bool VideoTrackObject::processFirstFrame() {
if (frame.isNull()) {
return false;
}
_shared->init(std::move(frame), _syncTimePoint.trackTime);
_shared->init(std::move(frame), alpha, _syncTimePoint.trackTime);
callReady();
queueReadFrames();
return true;
@ -702,12 +704,16 @@ void VideoTrackObject::fail(Error error) {
_error(error);
}
void VideoTrack::Shared::init(QImage &&cover, crl::time position) {
void VideoTrack::Shared::init(
QImage &&cover,
bool hasAlpha,
crl::time position) {
Expects(!initialized());
_frames[0].original = std::move(cover);
_frames[0].position = position;
_frames[0].format = FrameFormat::ARGB32;
_frames[0].alpha = hasAlpha;
// Usually main thread sets displayed time before _counter increment.
// But in this case we update _counter, so we set a fake displayed time.

2
Telegram/SourceFiles/media/streaming/media_streaming_video_track.h
View file

@ -110,7 +110,7 @@ private:
};
// Called from the wrapped object queue.
void init(QImage &&cover, crl::time position);
void init(QImage &&cover, bool hasAlpha, crl::time position);
[[nodiscard]] bool initialized() const;
[[nodiscard]] PrepareState prepareState(