audio.h

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

audio.h -- Audio subsystem

Copyright (C) 2004
Michael Wiedenbauer (shagkur)
Dave Murphy (WinterMute)

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 __AUDIO_H__
#define __AUDIO_H__

#include <gctypes.h>

#define AI_STREAM_STOP          0x00000000      
#define AI_STREAM_START         0x00000001      
#define AI_SAMPLERATE_32KHZ     0x00000000      
#define AI_SAMPLERATE_48KHZ     0x00000001      
#ifdef __cplusplus
   extern "C" {
#endif /* __cplusplus */

typedef void (*AIDCallback)(void);


typedef void (*AISCallback)(u32 smp_cnt);


AISCallback AUDIO_RegisterStreamCallback(AISCallback callback);


void AUDIO_Init(u8 *stack);


void AUDIO_SetStreamVolLeft(u8 vol);


u8 AUDIO_GetStreamVolLeft();


void AUDIO_SetStreamVolRight(u8 vol);


u8 AUDIO_GetStreamVolRight();


void AUDIO_SetStreamSampleRate(u32 rate);


u32 AUDIO_GetStreamSampleRate();


AIDCallback AUDIO_RegisterDMACallback(AIDCallback callback);


void AUDIO_InitDMA(u32 startaddr,u32 len);


u16 AUDIO_GetDMAEnableFlag();


void AUDIO_StartDMA();


void AUDIO_StopDMA();


u32 AUDIO_GetDMABytesLeft();


u32 AUDIO_GetDMALength();


u32 AUDIO_GetDMAStartAddr();


void AUDIO_SetStreamTrigger(u32 cnt);


void AUDIO_ResetStreamSampleCnt();


void AUDIO_SetDSPSampleRate(u8 rate);


u32 AUDIO_GetDSPSampleRate();


void AUDIO_SetStreamPlayState(u32 state);


u32 AUDIO_GetStreamPlayState();

#ifdef __cplusplus
   }
#endif /* __cplusplus */

#endif