mirror of
https://github.com/dborth/snes9xgx.git
synced 2024-12-18 07:11:50 +01:00
167 lines
4.0 KiB
C++
167 lines
4.0 KiB
C++
/****************************************************************************
|
|
* Snes9x Nintendo Wii/Gamecube Port
|
|
*
|
|
* softdev July 2006
|
|
* Tantric 2008-2010
|
|
*
|
|
* audio.cpp
|
|
*
|
|
* Audio driver
|
|
* Audio is fixed to 32Khz/16bit/Stereo
|
|
***************************************************************************/
|
|
|
|
#include <gccore.h>
|
|
#include <ogcsys.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <asndlib.h>
|
|
|
|
#include "video.h"
|
|
|
|
#include "snes9x/snes9x.h"
|
|
#include "snes9x/memmap.h"
|
|
#include "snes9x/cpuexec.h"
|
|
#include "snes9x/ppu.h"
|
|
#include "snes9x/apu/apu.h"
|
|
#include "snes9x/display.h"
|
|
#include "snes9x/gfx.h"
|
|
#include "snes9x/spc7110.h"
|
|
#include "snes9x/controls.h"
|
|
|
|
extern int ConfigRequested;
|
|
|
|
/*** Double buffered audio ***/
|
|
#define AUDIOBUFFER 2048
|
|
static unsigned char soundbuffer[2][AUDIOBUFFER] __attribute__ ((__aligned__ (32)));
|
|
static int whichab = 0; /*** Audio buffer flip switch ***/
|
|
|
|
#define AUDIOSTACK 16384
|
|
static lwpq_t audioqueue;
|
|
static lwp_t athread;
|
|
static uint8 astack[AUDIOSTACK];
|
|
static mutex_t audiomutex = LWP_MUTEX_NULL;
|
|
|
|
/****************************************************************************
|
|
* Audio Threading
|
|
***************************************************************************/
|
|
static void *
|
|
AudioThread (void *arg)
|
|
{
|
|
LWP_InitQueue (&audioqueue);
|
|
|
|
while (1)
|
|
{
|
|
if (ConfigRequested)
|
|
memset (soundbuffer[whichab], 0, AUDIOBUFFER);
|
|
else
|
|
{
|
|
LWP_MutexLock(audiomutex);
|
|
S9xMixSamples (soundbuffer[whichab], AUDIOBUFFER >> 1);
|
|
LWP_MutexUnlock(audiomutex);
|
|
}
|
|
DCFlushRange (soundbuffer[whichab], AUDIOBUFFER);
|
|
LWP_ThreadSleep (audioqueue);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* MixSamples
|
|
* This continually calls S9xMixSamples On each DMA Completion
|
|
***************************************************************************/
|
|
static void
|
|
GCMixSamples ()
|
|
{
|
|
if (!ConfigRequested)
|
|
{
|
|
whichab ^= 1;
|
|
AUDIO_InitDMA ((u32) soundbuffer[whichab], AUDIOBUFFER);
|
|
LWP_ThreadSignal (audioqueue);
|
|
}
|
|
}
|
|
|
|
static void FinalizeSamplesCallback (void *data)
|
|
{
|
|
LWP_MutexLock(audiomutex);
|
|
S9xFinalizeSamples();
|
|
LWP_MutexUnlock(audiomutex);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* InitAudio
|
|
***************************************************************************/
|
|
void
|
|
InitAudio ()
|
|
{
|
|
#ifdef NO_SOUND
|
|
AUDIO_Init (NULL);
|
|
AUDIO_SetDSPSampleRate(AI_SAMPLERATE_32KHZ);
|
|
AUDIO_RegisterDMACallback(GCMixSamples);
|
|
#else
|
|
ASND_Init();
|
|
#endif
|
|
LWP_MutexInit(&audiomutex, false);
|
|
LWP_CreateThread (&athread, AudioThread, NULL, astack, AUDIOSTACK, 70);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* SwitchAudioMode
|
|
*
|
|
* Switches between menu sound and emulator sound
|
|
***************************************************************************/
|
|
void
|
|
SwitchAudioMode(int mode)
|
|
{
|
|
if(mode == 0) // emulator
|
|
{
|
|
#ifndef NO_SOUND
|
|
ASND_Pause(1);
|
|
AUDIO_StopDMA();
|
|
AUDIO_SetDSPSampleRate(AI_SAMPLERATE_32KHZ);
|
|
AUDIO_RegisterDMACallback(GCMixSamples);
|
|
#endif
|
|
memset(soundbuffer[0],0,AUDIOBUFFER);
|
|
memset(soundbuffer[1],0,AUDIOBUFFER);
|
|
DCFlushRange(soundbuffer[0],AUDIOBUFFER);
|
|
DCFlushRange(soundbuffer[1],AUDIOBUFFER);
|
|
AUDIO_InitDMA((u32)soundbuffer[whichab],AUDIOBUFFER);
|
|
AUDIO_StartDMA();
|
|
|
|
S9xSetSamplesAvailableCallback(FinalizeSamplesCallback, NULL);
|
|
}
|
|
else // menu
|
|
{
|
|
S9xSetSamplesAvailableCallback(NULL, NULL);
|
|
#ifndef NO_SOUND
|
|
ASND_Init();
|
|
ASND_Pause(0);
|
|
#else
|
|
AUDIO_StopDMA();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* ShutdownAudio
|
|
*
|
|
* Shuts down audio subsystem. Useful to avoid unpleasant sounds if a
|
|
* crash occurs during shutdown.
|
|
***************************************************************************/
|
|
void ShutdownAudio()
|
|
{
|
|
AUDIO_StopDMA();
|
|
}
|
|
|
|
/****************************************************************************
|
|
* AudioStart
|
|
*
|
|
* Called to kick off the Audio Queue
|
|
***************************************************************************/
|
|
void
|
|
AudioStart ()
|
|
{
|
|
GCMixSamples ();
|
|
}
|