ios_project/proj.ios_mac/cocos2d-x/cocos/audio/android/AudioMixerController.h

/****************************************************************************
Copyright (c) 2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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#pragma once

#include "audio/android/utils/Errors.h"

#include <thread>
#include <mutex>
#include <condition_variable>
#include <atomic>
#include <vector>

namespace cocos2d { 

class Track;
class AudioMixer;

class AudioMixerController
{
public:

    struct OutputBuffer
    {
        void* buf;
        size_t size;
    };

    AudioMixerController(int bufferSizeInFrames, int sampleRate, int channelCount);

    ~AudioMixerController();

    bool init();

    bool addTrack(Track* track);
    bool hasPlayingTacks();

    void pause();
    void resume();
    inline bool isPaused() const { return _isPaused; };

    void mixOneFrame();

    inline OutputBuffer* current() { return &_mixingBuffer; }

private:
    void destroy();
    void initTrack(Track* track, std::vector<Track*>& tracksToRemove);

private:
    int _bufferSizeInFrames;
    int _sampleRate;
    int _channelCount;

    AudioMixer* _mixer;

    std::mutex _activeTracksMutex;
    std::vector<Track*> _activeTracks;

    OutputBuffer _mixingBuffer;

    std::atomic_bool _isPaused;
    std::atomic_bool _isMixingFrame;
};

} // namespace cocos2d {