173 lines
4.1 KiB
C++
173 lines
4.1 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "media/streaming/media_streaming_audio_track.h"
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#include "media/streaming/media_streaming_utility.h"
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#include "media/audio/media_audio.h"
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#include "media/audio/media_child_ffmpeg_loader.h"
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#include "media/player/media_player_instance.h"
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namespace Media {
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namespace Streaming {
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AudioTrack::AudioTrack(
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const PlaybackOptions &options,
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Stream &&stream,
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AudioMsgId audioId,
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FnMut<void(const Information &)> ready,
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Fn<void()> error)
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: _options(options)
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, _stream(std::move(stream))
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, _audioId(audioId)
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, _ready(std::move(ready))
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, _error(std::move(error))
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, _playPosition(options.position) {
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Expects(_ready != nullptr);
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Expects(_error != nullptr);
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Expects(_audioId.playId() != 0);
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}
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int AudioTrack::streamIndex() const {
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// Thread-safe, because _stream.index is immutable.
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return _stream.index;
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}
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AVRational AudioTrack::streamTimeBase() const {
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return _stream.timeBase;
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}
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void AudioTrack::process(Packet &&packet) {
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_noMoreData = packet.empty();
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if (initialized()) {
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mixerEnqueue(std::move(packet));
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} else if (!tryReadFirstFrame(std::move(packet))) {
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_error();
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}
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}
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bool AudioTrack::initialized() const {
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return !_ready;
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}
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bool AudioTrack::tryReadFirstFrame(Packet &&packet) {
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// #TODO streaming fix seek to the end.
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if (ProcessPacket(_stream, std::move(packet)).failed()) {
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return false;
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}
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if (const auto error = ReadNextFrame(_stream)) {
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if (error.code() == AVERROR_EOF) {
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// #TODO streaming fix seek to the end.
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return false;
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} else if (error.code() != AVERROR(EAGAIN) || _noMoreData) {
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return false;
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}
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return true;
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} else if (!fillStateFromFrame()) {
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return false;
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}
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mixerInit();
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callReady();
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return true;
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}
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bool AudioTrack::fillStateFromFrame() {
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_startedPosition = FramePosition(_stream);
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return (_startedPosition != kTimeUnknown);
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}
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void AudioTrack::mixerInit() {
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Expects(!initialized());
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auto data = std::make_unique<VideoSoundData>();
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data->frame = _stream.frame.release();
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data->context = _stream.codec.release();
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data->frequency = _stream.frequency;
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data->length = (_stream.duration * data->frequency) / 1000LL;
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data->speed = _options.speed;
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Media::Player::mixer()->play(
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_audioId,
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std::move(data),
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_startedPosition);
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}
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void AudioTrack::callReady() {
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Expects(_ready != nullptr);
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auto data = AudioInformation();
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data.state.duration = _stream.duration;
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data.state.position = _startedPosition;
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data.state.receivedTill = _noMoreData
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? _stream.duration
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: _startedPosition;
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base::take(_ready)({ VideoInformation(), data });
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}
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void AudioTrack::mixerEnqueue(Packet &&packet) {
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Media::Player::mixer()->feedFromVideo({
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&packet.fields(),
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_audioId
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});
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packet.release();
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}
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void AudioTrack::start(crl::time startTime) {
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Expects(initialized());
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// #TODO streaming support start() when paused.
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Media::Player::mixer()->resume(_audioId, true);
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}
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rpl::producer<crl::time> AudioTrack::playPosition() {
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Expects(_ready == nullptr);
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if (!_subscription) {
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_subscription = Media::Player::Updated(
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).add_subscription([=](const AudioMsgId &id) {
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using State = Media::Player::State;
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if (id != _audioId) {
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return;
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}
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const auto type = AudioMsgId::Type::Video;
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const auto state = Media::Player::mixer()->currentState(type);
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if (state.id != _audioId) {
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// #TODO streaming muted by other
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return;
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} else switch (state.state) {
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case State::Stopped:
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case State::StoppedAtEnd:
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case State::PausedAtEnd:
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_playPosition.reset();
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return;
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case State::StoppedAtError:
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case State::StoppedAtStart:
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_error();
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return;
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case State::Starting:
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case State::Playing:
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case State::Stopping:
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case State::Pausing:
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case State::Resuming:
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_playPosition = state.position * 1000 / state.frequency;
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return;
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case State::Paused:
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return;
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}
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});
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}
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return _playPosition.value();
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}
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AudioTrack::~AudioTrack() {
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if (_audioId.playId()) {
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Media::Player::mixer()->stop(_audioId);
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}
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}
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} // namespace Streaming
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} // namespace Media
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