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playback_stream.h

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/*
        $Id: playback_stream.h,v 1.1 2001/03/06 15:09:25 mbn 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.

        ------------------------------------------------------------------------

        File purpose:
                Sound card impl. that uses the ClanSound library.

*/

#ifndef header_playback_stream
#define header_playback_stream

#ifdef USE_CLANSOUND

#include "API/Sound/stream_soundprovider.h"
#include "API/Core/System/keep_alive.h"
#include "soundcard_clan.h"
#include "cardplayback_clan.h"
#include "Core/System/Unix/init_linux.h"
#include "../Generic/soundbuffer_generic.h"

class CL_Playback_Stream
: public CL_CardPlayback_ClanSound, CL_KeepAlive
{
public:
        CL_Playback_Stream(
                CL_SoundCard_ClanSound *card,
                CL_StreamSoundProvider *provider,
                CL_SoundBuffer_Generic *owner);
        virtual ~CL_Playback_Stream();

        virtual void keep_alive();

        // Functions inherited from Generic:
        // ---------------------------------
        virtual int get_position();
        virtual float get_position_relative();

        virtual bool set_position(int new_pos);
        virtual bool set_position_relative(float new_pos);

        virtual int get_length(); // -1 if unknown

        virtual int get_frequency();
        virtual bool set_frequency(int new_freq);

        virtual float get_volume();
        virtual bool set_volume(float new_volume);

        virtual float get_pan();
        virtual bool set_pan(float new_pan);

        virtual void set_looping(bool looping);
        virtual bool get_looping();

        virtual void play();
        virtual void stop();

        virtual bool is_playing();
        
        virtual CL_SoundBuffer_Generic *get_owner()
        {
                return owner;
        }

        // Mixer interface (from cardplayback_clansound):
        // ----------------------------------------------
        
        virtual void get_playback_data(int *data, int num_samples);
        virtual void mix_to(int *data, int num_samples);

private:
        int ask_update();
        int update(void *data, int data_size);
        void update_format(int pos, int num_samples, void *data);
        void flush();
        int get_samples_available();

private:
        CL_StreamSoundProvider *provider;
        CL_StreamSoundProvider_Session *provider_session;
        CL_SoundBuffer_Generic *owner;

        int format;
        float volume;
        float pan;
        int frequency;
        volatile double pos;

        bool playing;
        volatile int filled_pos;
        bool first_time;
        
        short *ring_buffer;
        int buffer_size;
        bool stream_eof;
};

#endif /* USE_CLANSOUND */

#endif

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