DynamicMusic.h

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/*******************************************************************************
* Copyright 2015-2016 Juan Francisco Crespo Galán
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
 
#pragma once
 
#include "devices/IHandle.h"
#include "devices/IDevice.h"
#include "ISound.h"
 
#include <memory>
#include <vector>
#include <thread>
#include <atomic> 
#include <condition_variable>
#include <mutex>
 
AUD_NAMESPACE_BEGIN
 
class AUD_API DynamicMusic
{
private:
    std::vector<std::vector<std::shared_ptr<ISound>>> m_scenes;
 
    std::atomic_int m_id;
 
    double m_fadeTime;
 
    std::shared_ptr<IHandle> m_currentHandle;
 
    std::shared_ptr<IHandle> m_transitionHandle;
 
    std::shared_ptr<IDevice> m_device;
 
    std::atomic_bool m_transitioning;
 
    std::atomic_bool m_stopThread;
 
    std::atomic_int m_soundTarget;
 
    float m_volume;
 
    std::thread m_fadeThread;
 
    // delete copy constructor and operator=
    DynamicMusic(const DynamicMusic&) = delete;
    DynamicMusic& operator=(const DynamicMusic&) = delete;
 
public:
    DynamicMusic(std::shared_ptr<IDevice> device);
 
    virtual ~DynamicMusic();
 
    int addScene(std::shared_ptr<ISound> sound);
 
    bool changeScene(int id);
 
    int getScene();
 
    bool addTransition(int init, int end, std::shared_ptr<ISound> sound);
 
    void setFadeTime(double seconds);
 
    double getFadeTime();
 
    bool resume();
 
    bool pause();
 
    bool seek(double position);
 
    double getPosition();
 
    float getVolume();
 
    bool setVolume(float volume);
 
    Status getStatus();
 
    bool stop();
 
    private:
        //Callbacks used to schedule transitions after a sound ends.
        static void transitionCallback(void* player);
        static void sceneCallback(void* player);
        //These functions can fade sounds in and out if used with a thread.
        void crossfadeThread();
        void fadeInThread();
        void fadeOutThread();
};
 
AUD_NAMESPACE_END