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view src/audio/nds/soundcommon.h @ 4001:6831b8723a85 SDL-1.2

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Don't initialize the audio buffer passed to the application's audio callback, since they are expected to entirely fill it with data or silence. For legacy apps that might expect the buffer to already have silence and thus may not fill the buffer in the callback, there's an environment variable to expose the old behaviour. Fixes Bugzilla #416.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 05 Jul 2007 02:24:36 +0000
parents 8582c6a5ca16
children a1b03ba2fcd0
line wrap: on
line source

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

    This library is 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 __SOUNDCOMMON_H
#define __SOUNDCOMMON_H

#include <nds.h>

#define CLOCK (1 << 25)

#ifdef __cplusplus
extern "C" {
#endif

typedef enum
{
	NONE = 0,
	INIT = 1,
	MIX = 2,
	MIXING = 4,
	STOP = 8
}CommandType;

typedef enum
{
	FIFO_NONE = 0,
	UPDATEON_ARM9 = 1,
	MIXCOMPLETE_ONARM9 = 2,
}FifoType; 

typedef struct
{
	s8 *mixbuffer;//,*soundbuffer;
	u32 rate;
	u32 buffersize;
	u32 cmd;
	u8 channel,format;
	u32 soundcursor,numsamples;
	s32 prevtimer;
	s16 period;
}S_SoundSystem;

#define soundsystem ((S_SoundSystem*)((u32)(IPC)+sizeof(TransferRegion)))

#ifdef ARM9
extern void SoundSystemInit(u32 rate,u32 buffersize,u8 channel,u8 format);
extern void SoundStartMixer(void);
extern void SendCommandToArm7(u32 command);
#else
extern void SoundVBlankIrq(void);
extern void SoundSwapAndMix(void);
extern void SoundSetTimer(int period);
extern void SoundFifoHandler(void);
extern void SendCommandToArm9(u32 command);
#endif

#ifdef __cplusplus
}
#endif
#endif