94 lines
2.6 KiB
C++
94 lines
2.6 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_utility.h"
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namespace Media {
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namespace Streaming {
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class AudioTrack final {
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public:
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// Called from some unspecified thread.
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// Callbacks are assumed to be thread-safe.
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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)> error);
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// Called from the main thread.
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// Must be called after 'ready' was invoked.
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void pause(crl::time time);
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void resume(crl::time time);
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// Allow to irreversibly stop only audio track.
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void stop();
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// Called from the main thread.
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void setSpeed(float64 speed);
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[[nodiscard]] rpl::producer<> waitingForData() const;
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// Called from the main thread.
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// Non-const, because we subscribe to changes on the first call.
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// Must be called after 'ready' was invoked.
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[[nodiscard]] rpl::producer<crl::time> playPosition();
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// Thread-safe.
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[[nodiscard]] int streamIndex() const;
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[[nodiscard]] AVRational streamTimeBase() const;
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[[nodiscard]] crl::time streamDuration() const;
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// Called from the same unspecified thread.
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void process(std::vector<FFmpeg::Packet> &&packets);
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void waitForData();
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// Called from the main thread.
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~AudioTrack();
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private:
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// Called from the same unspecified thread.
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[[nodiscard]] bool initialized() const;
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[[nodiscard]] bool tryReadFirstFrame(FFmpeg::Packet &&packet);
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[[nodiscard]] bool fillStateFromFrame();
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[[nodiscard]] bool processFirstFrame();
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void mixerInit();
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void mixerEnqueue(gsl::span<FFmpeg::Packet> packets);
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void mixerForceToBuffer();
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void callReady();
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PlaybackOptions _options;
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// Accessed from the same unspecified thread.
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Stream _stream;
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const AudioMsgId _audioId;
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bool _readTillEnd = false;
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// Assumed to be thread-safe.
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FnMut<void(const Information &)> _ready;
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const Fn<void(Error)> _error;
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// First set from the same unspecified thread before _ready is called.
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// After that is immutable.
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crl::time _startedPosition = kTimeUnknown;
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// Accessed from the main thread.
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rpl::lifetime _subscription;
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rpl::event_stream<> _waitingForData;
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// First set from the same unspecified thread before _ready is called.
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// After that accessed from the main thread.
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rpl::variable<crl::time> _playPosition;
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// For initial frame skipping for an exact seek.
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FFmpeg::FramePointer _initialSkippingFrame;
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};
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} // namespace Streaming
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} // namespace Media
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