SoundStream.hpp

//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//

#ifndef CPP3DS_SOUNDSTREAM_HPP
#define CPP3DS_SOUNDSTREAM_HPP

// Headers
#ifndef EMULATION
#include <cpp3ds/System/LinearAllocator.hpp>
#endif
#include <cpp3ds/Audio/SoundSource.hpp>
#include <cpp3ds/System/Thread.hpp>
#include <cpp3ds/System/Time.hpp>
#include <cpp3ds/System/Mutex.hpp>
#include <cstdlib>
#include <vector>


namespace cpp3ds
{
class SoundStream : public SoundSource
{
public:

    struct Chunk
    {
        const Int16* samples;     
        std::size_t  sampleCount; 
    };

    virtual ~SoundStream();

    void play();

    void pause();

    void stop();

    unsigned int getChannelCount() const;

    unsigned int getSampleRate() const;

    Status getStatus() const;

    void setPlayingOffset(Time timeOffset);

    Time getPlayingOffset() const;

    void setLoop(bool loop);

    bool getLoop() const;

protected:

    SoundStream();

    void initialize(unsigned int channelCount, unsigned int sampleRate);

    virtual bool onGetData(Chunk& data) = 0;

    virtual void onSeek(Time timeOffset) = 0;

private:

    void streamData();

    bool fillAndPushBuffer(unsigned int bufferNum);

    bool fillQueue();

    void clearQueue();

    enum
    {
        BufferCount = 3 
    };

    // Member data
    Thread        m_thread;                  
    mutable Mutex m_threadMutex;             
    Status        m_threadStartState;        
    bool          m_isStreaming;             
    unsigned int  m_channelCount;            
    unsigned int  m_sampleRate;              
    Uint32        m_format;                  
    bool          m_loop;                    
    Uint64        m_samplesProcessed;        
    bool          m_endBuffers[BufferCount]; 
#ifndef EMULATION
    ndspWaveBuf   m_ndspWaveBuffers[BufferCount];
    std::vector<Int16, LinearAllocator<Int16>> m_buffers[BufferCount];
#else
    unsigned int  m_buffers[BufferCount];    
#endif
};

} // namespace cpp3ds


#endif // CPP3DS_SOUNDSTREAM_HPP