axmol/cocos/audio/android/AudioPlayerProvider.h

/****************************************************************************
Copyright (c) 2016 Chukong Technologies Inc.

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#pragma once

#include "audio/android/IAudioPlayer.h"
#include "audio/android/OpenSLHelper.h"
#include "audio/android/PcmData.h"

#include <unordered_map>
#include <memory>
#include <condition_variable>

namespace cocos2d { namespace experimental {
// Manage PcmAudioPlayer& UrlAudioPlayer

class PcmAudioPlayer;
class PcmAudioService;
class UrlAudioPlayer;
class AudioMixerController;
class ICallerThreadUtils;
class AssetFd;
class ThreadPool;

class AudioPlayerProvider
{
public:
    AudioPlayerProvider(SLEngineItf engineItf, SLObjectItf outputMixObject, int deviceSampleRate,
                        int bufferSizeInFrames, const FdGetterCallback &fdGetterCallback,
                        ICallerThreadUtils* callerThreadUtils);

    virtual ~AudioPlayerProvider();

    IAudioPlayer *getAudioPlayer(const std::string &audioFilePath);

    typedef std::function<void(bool/* succeed */, PcmData /* data */)> PreloadCallback;
    void preloadEffect(const std::string &audioFilePath, const PreloadCallback& cb);

    void clearPcmCache(const std::string &audioFilePath);

    void clearAllPcmCaches();

    void pause();

    void resume();

private:

    struct AudioFileInfo
    {
        std::string url;
        std::shared_ptr<AssetFd> assetFd;
        off_t start;
        off_t length;

        AudioFileInfo()
                : assetFd(nullptr), start(0), length(0)
        { };

        inline bool isValid() const
        {
            return !url.empty() && length > 0;
        }
    };

    PcmAudioPlayer *obtainPcmAudioPlayer(const std::string &url, const PcmData &pcmData);

    UrlAudioPlayer *createUrlAudioPlayer(const AudioFileInfo &info);

    void preloadEffect(const AudioFileInfo &info, const PreloadCallback& cb);

    AudioFileInfo getFileInfo(const std::string &audioFilePath);

    bool isSmallFile(const AudioFileInfo &info);

private:
    SLEngineItf _engineItf;
    SLObjectItf _outputMixObject;
    int _deviceSampleRate;
    int _bufferSizeInFrames;
    FdGetterCallback _fdGetterCallback;
    ICallerThreadUtils* _callerThreadUtils;

    std::unordered_map<std::string, PcmData> _pcmCache;
    std::mutex _pcmCacheMutex;

    struct PreloadCallbackParam
    {
        PreloadCallback callback;
    };

    std::unordered_map<std::string, std::vector<PreloadCallbackParam>> _preloadCallbackMap;
    std::mutex _preloadCallbackMutex;

    std::mutex _preloadWaitMutex;
    std::condition_variable _preloadWaitCond;

    PcmAudioService* _pcmAudioService;
    AudioMixerController *_mixController;

    ThreadPool* _threadPool;
};

}} // namespace cocos2d { namespace experimental {