Music.hpp

//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2018 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 SFML_MUSIC_HPP
#define SFML_MUSIC_HPP

// Headers
#include <SFML/Audio/Export.hpp>
#include <SFML/Audio/SoundStream.hpp>
#include <SFML/Audio/InputSoundFile.hpp>
#include <SFML/System/Mutex.hpp>
#include <SFML/System/Time.hpp>
#include <string>
#include <vector>


namespace sf
{
class InputStream;

class SFML_AUDIO_API Music : public SoundStream
{
public:

    template <typename T>
    struct Span
    {
        Span()
        {

        }

        Span(T off, T len):
        offset(off),
        length(len)
        {

        }

        T offset; 
        T length; 
    };

    // Define the relevant Span types
    typedef Span<Time> TimeSpan;

    Music();

    ~Music();

    bool openFromFile(const std::string& filename);

    bool openFromMemory(const void* data, std::size_t sizeInBytes);

    bool openFromStream(InputStream& stream);

    Time getDuration() const;

    TimeSpan getLoopPoints() const;

    void setLoopPoints(TimeSpan timePoints);

protected:

    virtual bool onGetData(Chunk& data);

    virtual void onSeek(Time timeOffset);

    virtual Int64 onLoop();

private:

    void initialize();

    Uint64 timeToSamples(Time position) const;

    Time samplesToTime(Uint64 samples) const;

    // Member data
    InputSoundFile     m_file;     
    std::vector<Int16> m_samples;  
    Mutex              m_mutex;    
    Span<Uint64>       m_loopSpan; 
};

} // namespace sf


#endif // SFML_MUSIC_HPP