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mpeg_soundprovider.h

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/*
        $Id: mpeg_soundprovider.h,v 1.2 2000/07/15 15:45:50 starch Exp $

        ------------------------------------------------------------------------
        ClanLib, the platform independent game SDK.

        This library is distributed under the GNU LIBRARY GENERAL PUBLIC LICENSE
        version 2. See COPYING for details.

        For a total list of contributers see CREDITS.

        ------------------------------------------------------------------------
*/

#ifndef header_mpeg_soundprovider
#define header_mpeg_soundprovider

#include "../Core/Sound/stream_soundprovider.h"
#include <MPEG/MPEG.h>

class CL_MPEGSoundProvider : public CL_StreamSoundProvider
//: Streamed MPEG audio stream sound provider.
{
public:
        CL_MPEGSoundProvider(const char *filename);
        virtual ~CL_MPEGSoundProvider();

        virtual CL_StreamSoundProvider_Session *begin_session();
        virtual void end_session(CL_StreamSoundProvider_Session *session);

private:
        std::string file;
};

class CL_MPEGSoundProvider_Session : public CL_StreamSoundProvider_Session, MPEGAudioDrv
{
public:
        CL_MPEGSoundProvider_Session(const char *filename);
        virtual ~CL_MPEGSoundProvider_Session();

        virtual bool eof() const;
        //: Returns true if no more input data is available.
        
        virtual void stop();
        //: Stops the current stream.

        virtual bool play();
        //: Start/continue playing of the stream.
                
        virtual bool set_position(int pos);
        //: Sets the position within the current stream.
        
        virtual int get_data(void *data_ptr, int data_requested);
        //: Called when a playback session needs more sample data.

        virtual int get_frequency() const;
        //: Returns the playback frequency of the input data.

        virtual SoundFormat get_format() const;
        //: Returns the playback sample format.

protected:
        // MPEGAudioDrv interface:
        virtual bool Open(MPEGAudioSpec *desired, MPEGAudioSpec *optained);
        virtual void Close();
        virtual void Pause(bool enable);
        virtual void Mix(Uint8 *dst, Uint8 *src, Uint32 len, int volume);
        virtual void Lock();
        virtual void Unlock();
        virtual int GetMaxVolume();
        virtual char *GetError();

private:
        MPEG *mpeg;
        MPEGAudioSpec audiospec;
};

#endif

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