sound_handler_ahi.h

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// sound_handler_ahi.h: Sound handling using standard AHI
//
//   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
//   Free Software Foundation, Inc
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

#ifndef SOUND_HANDLER_AHI_H
#define SOUND_HANDLER_AHI_H

#include "sound_handler.h" // for inheritance

#include <set> // for composition (InputStreams)
#include <mutex>

#include <proto/dos.h>
#include <proto/exec.h>
#include <proto/ahi.h>

#include <devices/ahi.h>
#include <exec/memory.h>

#include <sys/types.h>
// Forward declarations
namespace gnash {
    class SimpleBuffer;
    namespace sound {
        class EmbedSound;
        class InputStream;
    }
}

namespace gnash {
namespace sound {

class AOS4_sound_handler : public sound_handler
{
private:
        struct MsgPort          *_port;
        uint32                           _timerSig;
        struct TimeRequest      *_timerio;
        struct TimerIFace       *ITimer;

        struct AHIIFace         *IAHI;
        struct Library          *AHIBase;
        struct MsgPort          *AHImp;                                 //AHI Message Port
        struct AHIRequest       *AHIio;
        BYTE                             AHIDevice;
        struct AHIRequest       *AHIios[2];
        APTR                             AHIiocopy;
        ULONG                            AHICurBuf;
        bool                             AHIReqSent[2];
        UBYTE                           *PlayBuffer[2];
        ULONG                            BufferFill;
        UBYTE                           *BufferPointer;
        ULONG                            Buffer;

        struct Process          *AudioPump;

        bool TimerInit(void);
        void TimerExit(void);
        void TimerReset(uint32 microDelay);

    void initAudio();
    void openAudio();
    void closeAudio();

    bool _audioOpened;
        bool _closing;

        struct DeathMessage *_dmsg;     // the child Death Message
        struct MsgPort *_DMreplyport;   // and its port
        
    std::mutex _mutex;

    // See dox in sound_handler.h
    void mix(std::int16_t* outSamples, std::int16_t* inSamples,
                unsigned int nSamples, float volume);

public:

    AOS4_sound_handler(media::MediaHandler* m);

    ~AOS4_sound_handler();

    // See dox in sound_handler.h
    virtual int create_sound(std::unique_ptr<SimpleBuffer> data, std::unique_ptr<media::SoundInfo> sinfo);

    // See dox in sound_handler.h
    // overridden to serialize access to the data buffer slot
    virtual StreamBlockId addSoundBlock(unsigned char* data,
                                       unsigned int data_bytes,
                                       unsigned int sample_count,
                                       int streamId);

    // See dox in sound_handler.h
    virtual void    stop_sound(int sound_handle);

    // See dox in sound_handler.h
    virtual void    delete_sound(int sound_handle);

    // See dox in sound_handler.h
    virtual void reset();

    // See dox in sound_handler.h
    virtual void    stop_all_sounds();

    // See dox in sound_handler.h
    virtual int get_volume(int sound_handle);

    // See dox in sound_handler.h
    virtual void    set_volume(int sound_handle, int volume);

    // See dox in sound_handler.h
    virtual media::SoundInfo* get_sound_info(int soundHandle);

    // See dox in sound_handler.h
    // overridden to close audio card
    virtual void pause();

    // See dox in sound_handler.h
    // overridden to open audio card
    virtual void unpause();

    // See dox in sound_handler.h
    virtual unsigned int get_duration(int sound_handle);

    // See dox in sound_handler.h
    virtual unsigned int tell(int sound_handle);

    // See dox in sound_handler.h
    // Overridden to unpause SDL audio
    void plugInputStream(std::unique_ptr<InputStream> in);

    // See dox in sound_handler.h
    void fetchSamples(std::int16_t* to, unsigned int nSamples);

        int audioTask();
};



} // gnash.sound namespace
} // namespace gnash

#endif // SOUND_HANDLER_AHI_H