165 lines
4.0 KiB
C++
165 lines
4.0 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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#pragma once
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#include "media/streaming/media_streaming_common.h"
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#include "media/streaming/media_streaming_file_delegate.h"
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#include "base/weak_ptr.h"
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#include "base/timer.h"
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namespace Data {
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class Session;
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} // namespace Data
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namespace Media {
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namespace Player {
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struct TrackState;
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} // namespace Player
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} // namespace Media
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namespace Media {
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namespace Streaming {
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class Loader;
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class File;
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class AudioTrack;
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class VideoTrack;
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class Player final : private FileDelegate {
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public:
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// Public interfaces is used from the main thread.
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Player(not_null<Data::Session*> owner, std::unique_ptr<Loader> loader);
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// Because we remember 'this' in calls to crl::on_main.
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Player(const Player &other) = delete;
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Player &operator=(const Player &other) = delete;
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void play(const PlaybackOptions &options);
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void pause();
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void resume();
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void stop();
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bool valid() const;
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bool ready() const;
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float64 speed() const;
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void setSpeed(float64 speed); // 0.5 <= speed <= 2.
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[[nodiscard]] bool playing() const;
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[[nodiscard]] bool buffering() const;
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[[nodiscard]] bool paused() const;
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[[nodiscard]] bool failed() const;
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[[nodiscard]] bool finished() const;
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[[nodiscard]] rpl::producer<Update, Error> updates() const;
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[[nodiscard]] QImage frame(const FrameRequest &request) const;
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[[nodiscard]] Media::Player::TrackState prepareLegacyState() const;
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[[nodiscard]] rpl::lifetime &lifetime();
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~Player();
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private:
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enum class Stage {
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Uninitialized,
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Initializing,
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Ready,
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Started,
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Failed
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};
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// Thread-safe.
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not_null<FileDelegate*> delegate();
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// FileDelegate methods are called only from the File thread.
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void fileReady(Stream &&video, Stream &&audio) override;
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void fileError() override;
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void fileWaitingForData() override;
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bool fileProcessPacket(Packet &&packet) override;
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bool fileReadMore() override;
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// Called from the main thread.
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void streamReady(Information &&information);
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void streamFailed();
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void start();
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void provideStartInformation();
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void fail();
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void checkNextFrame();
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void renderFrame(crl::time now);
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void audioReceivedTill(crl::time position);
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void audioPlayedTill(crl::time position);
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void videoReceivedTill(crl::time position);
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void videoPlayedTill(crl::time position);
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void updatePausedState();
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[[nodiscard]] bool trackReceivedEnough(
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const TrackState &state,
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crl::time amount) const;
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[[nodiscard]] bool bothReceivedEnough(crl::time amount) const;
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[[nodiscard]] bool receivedTillEnd() const;
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void checkResumeFromWaitingForData();
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template <typename Track>
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void trackReceivedTill(
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const Track &track,
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TrackState &state,
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crl::time position);
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template <typename Track>
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void trackSendReceivedTill(
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const Track &track,
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TrackState &state);
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template <typename Track>
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void trackPlayedTill(
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const Track &track,
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TrackState &state,
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crl::time position);
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const std::unique_ptr<File> _file;
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// Immutable while File is active after it is ready.
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AudioMsgId _audioId;
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std::unique_ptr<AudioTrack> _audio;
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std::unique_ptr<VideoTrack> _video;
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// Immutable while File is active.
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base::has_weak_ptr _sessionGuard;
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PlaybackOptions _options;
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// Belongs to the File thread while File is active.
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bool _readTillEnd = false;
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bool _waitingForData = false;
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std::atomic<bool> _pauseReading = false;
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// Belongs to the main thread.
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Information _information;
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Stage _stage = Stage::Uninitialized;
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bool _pausedByUser = false;
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bool _pausedByWaitingForData = false;
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bool _paused = false;
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bool _audioFinished = false;
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bool _videoFinished = false;
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crl::time _startedTime = kTimeUnknown;
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crl::time _pausedTime = kTimeUnknown;
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crl::time _nextFrameTime = kTimeUnknown;
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base::Timer _renderFrameTimer;
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rpl::event_stream<Update, Error> _updates;
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rpl::lifetime _lifetime;
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rpl::lifetime _sessionLifetime;
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};
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} // namespace Streaming
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} // namespace Media
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