tdesktop/Telegram/SourceFiles/media/media_audio_loaders.h

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.

Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
*/
#pragma once

#include "media/media_child_ffmpeg_loader.h"
#include "media/media_audio.h"

extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/opt.h>
#include <libswresample/swresample.h>
} // extern "C"

class AudioPlayerLoader;
class ChildFFMpegLoader;
class AudioPlayerLoaders : public QObject {
	Q_OBJECT

public:
	AudioPlayerLoaders(QThread *thread);
	void startFromVideo(uint64 videoPlayId);
	void stopFromVideo();
	void feedFromVideo(VideoSoundPart &&part);
	~AudioPlayerLoaders();

signals:
	void error(const AudioMsgId &audio);
	void needToCheck();

public slots:
	void onInit();

	void onStart(const AudioMsgId &audio, qint64 position);
	void onLoad(const AudioMsgId &audio);
	void onCancel(const AudioMsgId &audio);

	void onVideoSoundAdded();

private:
	void clearFromVideoQueue();

	AudioMsgId _audio, _song, _video;
	std_::unique_ptr<AudioPlayerLoader> _audioLoader;
	std_::unique_ptr<AudioPlayerLoader> _songLoader;
	std_::unique_ptr<ChildFFMpegLoader> _videoLoader;

	QMutex _fromVideoMutex;
	uint64 _fromVideoPlayId;
	QQueue<AVPacket> _fromVideoQueue;
	SingleDelayedCall _fromVideoNotify;

	void emitError(AudioMsgId::Type type);
	AudioMsgId clear(AudioMsgId::Type type);
	void setStoppedState(AudioPlayer::AudioMsg *m, AudioPlayerState state = AudioPlayerStopped);

	enum SetupError {
		SetupErrorAtStart = 0,
		SetupErrorNotPlaying = 1,
		SetupErrorLoadedFull = 2,
		SetupNoErrorStarted = 3,
	};
	void loadData(AudioMsgId audio, qint64 position);
	AudioPlayerLoader *setupLoader(const AudioMsgId &audio, SetupError &err, qint64 position);
	AudioPlayer::AudioMsg *checkLoader(AudioMsgId::Type type);

};