/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is SDL_free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifndef _SDL_sysaudio_h
#define _SDL_sysaudio_h

#include "SDL_mutex.h"
#include "SDL_thread.h"

/* The SDL audio driver */
typedef struct SDL_AudioDevice SDL_AudioDevice;
#define _THIS	SDL_AudioDevice *_this

typedef struct SDL_AudioDriverImpl
{
    int (*DetectDevices)(int iscapture);
    const char *(*GetDeviceName)(int index, int iscapture);
    int (*OpenDevice) (_THIS, const char *devname, int iscapture);
    void (*ThreadInit) (_THIS); /* Called by audio thread at start */
    void (*WaitDevice) (_THIS);
    void (*PlayDevice) (_THIS);
    Uint8 *(*GetDeviceBuf) (_THIS);
    void (*WaitDone) (_THIS);
    void (*CloseDevice) (_THIS);
    void (*LockDevice) (_THIS);
    void (*UnlockDevice) (_THIS);
    void (*Deinitialize) (void);
} SDL_AudioDriverImpl;


typedef struct SDL_AudioDriver
{
    /* * * */
    /* The name of this audio driver */
    const char *name;

    /* * * */
    /* The description of this audio driver */
    const char *desc;

    SDL_AudioDriverImpl impl;
} SDL_AudioDriver;


/* Define the SDL audio driver structure */
struct SDL_AudioDevice
{
    /* * * */
    /* Lowlevel audio implementation */
    const SDL_AudioDriver *driver;

    /* * * */
    /* Data common to all devices */

    /* The current audio specification (shared with audio thread) */
    SDL_AudioSpec spec;

    /* An audio conversion block for audio format emulation */
    SDL_AudioCVT convert;

    /* Current state flags */
    int enabled;
    int paused;
    int opened;

    /* Fake audio buffer for when the audio hardware is busy */
    Uint8 *fake_stream;

    /* A semaphore for locking the mixing buffers */
    SDL_mutex *mixer_lock;

    /* A thread to feed the audio device */
    SDL_Thread *thread;
    Uint32 threadid;

    /* * * */
    /* Data private to this driver */
    struct SDL_PrivateAudioData *hidden;

    /* * * */
    /* The function used to dispose of this structure */
    void (*free) (_THIS);
};
#undef _THIS

typedef struct AudioBootStrap
{
    const char *name;
    const char *desc;
    int (*available) (void);
    int (*init) (SDL_AudioDriverImpl *impl);
} AudioBootStrap;

#if SDL_AUDIO_DRIVER_BSD
extern AudioBootStrap BSD_AUDIO_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_OSS
extern AudioBootStrap DSP_bootstrap;
extern AudioBootStrap DMA_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_ALSA
extern AudioBootStrap ALSA_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_QNXNTO
extern AudioBootStrap QNXNTOAUDIO_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_SUNAUDIO
extern AudioBootStrap SUNAUDIO_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DMEDIA
extern AudioBootStrap DMEDIA_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_ARTS
extern AudioBootStrap ARTS_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_ESD
extern AudioBootStrap ESD_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_NAS
extern AudioBootStrap NAS_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DSOUND
extern AudioBootStrap DSOUND_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_WAVEOUT
extern AudioBootStrap WAVEOUT_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_PAUD
extern AudioBootStrap Paud_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_BAUDIO
extern AudioBootStrap BAUDIO_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_COREAUDIO
extern AudioBootStrap COREAUDIO_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_SNDMGR
extern AudioBootStrap SNDMGR_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_AHI
extern AudioBootStrap AHI_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_MINT
extern AudioBootStrap MINTAUDIO_GSXB_bootstrap;
extern AudioBootStrap MINTAUDIO_MCSN_bootstrap;
extern AudioBootStrap MINTAUDIO_STFA_bootstrap;
extern AudioBootStrap MINTAUDIO_XBIOS_bootstrap;
extern AudioBootStrap MINTAUDIO_DMA8_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DISK
extern AudioBootStrap DISKAUD_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DUMMY
extern AudioBootStrap DUMMYAUD_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DC
extern AudioBootStrap DCAUD_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_MMEAUDIO
extern AudioBootStrap MMEAUDIO_bootstrap;
#endif
#if SDL_AUDIO_DRIVER_DART
extern AudioBootStrap DART_bootstrap;
#endif

#endif /* _SDL_sysaudio_h */
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