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cocos2d-x/cocos/audio/android/AudioMixerController.h

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+/****************************************************************************
+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
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+****************************************************************************/
+
+#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 {