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Telegram/SourceFiles/media/audio/media_audio_loaders.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "media/audio/media_audio.h"
+#include "media/audio/media_child_ffmpeg_loader.h"
+
+class AudioPlayerLoader;
+class ChildFFMpegLoader;
+
+namespace Media {
+namespace Player {
+
+class Loaders : public QObject {
+	Q_OBJECT
+
+public:
+	Loaders(QThread *thread);
+	void feedFromExternal(ExternalSoundPart &&part);
+	void forceToBufferExternal(const AudioMsgId &audioId);
+	~Loaders();
+
+Q_SIGNALS:
+	void error(const AudioMsgId &audio);
+	void needToCheck();
+
+public Q_SLOTS:
+	void onInit();
+
+	void onStart(const AudioMsgId &audio, qint64 positionMs);
+	void onLoad(const AudioMsgId &audio);
+	void onCancel(const AudioMsgId &audio);
+
+private:
+	struct SetupLoaderResult {
+		AudioPlayerLoader *loader = nullptr;
+		float64 oldSpeed = 0.;
+		float64 newSpeed = 0.;
+		int64 fadeStartPosition = 0;
+		int64 position = 0;
+		int64 normalLength = 0;
+		int frequency = 0;
+		bool errorAtStart = false;
+		bool justStarted = false;
+	};
+
+	void videoSoundAdded();
+	[[nodiscard]] Mixer::Track::WithSpeed rebufferOnSpeedChange(
+		const SetupLoaderResult &setup);
+
+	void emitError(AudioMsgId::Type type);
+	AudioMsgId clear(AudioMsgId::Type type);
+	void setStoppedState(Mixer::Track *m, State state = State::Stopped);
+
+	void loadData(AudioMsgId audio, crl::time positionMs = 0);
+	[[nodiscard]] SetupLoaderResult setupLoader(
+		const AudioMsgId &audio,
+		crl::time positionMs);
+	Mixer::Track *checkLoader(AudioMsgId::Type type);
+
+	AudioMsgId _audio, _song, _video;
+	std::unique_ptr<AudioPlayerLoader> _audioLoader;
+	std::unique_ptr<AudioPlayerLoader> _songLoader;
+	std::unique_ptr<AudioPlayerLoader> _videoLoader;
+
+	QMutex _fromExternalMutex;
+	base::flat_map<
+		AudioMsgId,
+		std::deque<FFmpeg::Packet>> _fromExternalQueues;
+	base::flat_set<AudioMsgId> _fromExternalForceToBuffer;
+	SingleQueuedInvokation _fromExternalNotify;
+
+};
+
+} // namespace Player
+} // namespace Media