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rewrites of audio system

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This commit is contained in:
dborth 2008-10-19 19:10:55 +00:00
parent 53958d97b0
commit 45b38cbb7e
4 changed files with 68 additions and 40 deletions
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100
source/ngc/audio.cpp
View File

@ -21,7 +21,50 @@ static int tail = 0;
static u8 mixerdata[MIXBUFFSIZE];
#define MIXERMASK ((MIXBUFFSIZE >> 2) - 1)
static u8 soundbuffer[3200] ATTRIBUTE_ALIGN(32);
static u8 soundbuffer[2][3840] ATTRIBUTE_ALIGN(32);
extern int ConfigRequested;
static int whichab = 0;
int IsPlaying = 0;
/****************************************************************************
* MIXER_GetSamples
***************************************************************************/
static int MIXER_GetSamples( u8 *dstbuffer, int maxlen )
{
u32 *src = (u32 *)mixerdata;
u32 *dst = (u32 *)dstbuffer;
u32 intlen = maxlen >> 2;
memset(dstbuffer, 0, maxlen);
while( ( head != tail ) && intlen )
{
*dst++ = src[tail++];
tail &= MIXERMASK;
intlen--;
}
return 3200;
}
/****************************************************************************
* MIXER_GetSamples
***************************************************************************/
static void AudioPlayer()
{
if ( !ConfigRequested )
{
int len = MIXER_GetSamples(soundbuffer[whichab], 3200);
DCFlushRange(soundbuffer[whichab],len);
AUDIO_InitDMA((u32)soundbuffer[whichab],len);
AUDIO_StartDMA();
whichab ^= 1;
IsPlaying = 1;
}
else
IsPlaying = 0;
}
/****************************************************************************
* MIXER_AddSamples
@ -54,57 +97,44 @@ void MIXER_AddSamples( u8 *sampledata, int len )
fixofs += fixinc;
}
while( --intlen );
// Restart Sound Processing if stopped
if (IsPlaying == 0)
{
ConfigRequested = 0;
AudioPlayer();
}
}
/****************************************************************************
* MIXER_GetSamples
****************************************************************************/
int MIXER_GetSamples( u8 *dstbuffer, int maxlen )
{
u32 *src = (u32 *)mixerdata;
u32 *dst = (u32 *)dstbuffer;
u32 intlen = maxlen >> 2;
memset(dstbuffer, 0, maxlen);
while( ( head != tail ) && intlen )
{
*dst++ = src[tail++];
tail &= MIXERMASK;
intlen--;
}
return 3200;
}
static void AudioPlayer()
{
AUDIO_StopDMA();
MIXER_GetSamples(soundbuffer, 3200);
DCFlushRange(soundbuffer,3200);
AUDIO_InitDMA((u32)soundbuffer,3200);
AUDIO_StartDMA();
}
***************************************************************************/
void InitialiseSound()
{
AUDIO_Init(NULL); // Start audio subsystem
AUDIO_SetDSPSampleRate(AI_SAMPLERATE_48KHZ);
AUDIO_RegisterDMACallback(AudioPlayer);
memset(soundbuffer, 0, 3200);
memset(soundbuffer, 0, 3840*2);
memset(mixerdata, 0, MIXBUFFSIZE);
}
/****************************************************************************
* MIXER_GetSamples
***************************************************************************/
void ResetAudio()
{
memset(soundbuffer, 0, 3200);
memset(soundbuffer, 0, 3840*2);
memset(mixerdata, 0, MIXBUFFSIZE);
}
/****************************************************************************
* MIXER_GetSamples
***************************************************************************/
void StopAudio()
{
AUDIO_StopDMA();
}
void StartAudio()
{
AUDIO_StartDMA();
IsPlaying = 0;
}

2
source/ngc/audio.h
View File

@ -12,9 +12,7 @@
#define __AUDIOMIXER__
void MIXER_AddSamples( u8 *sampledata, int len );
int MIXER_GetSamples( u8 *dstbuffer, int maxlen );
void StopAudio();
void StartAudio();
void ResetAudio();
void InitialiseSound();

2
source/ngc/input.cpp
View File

@ -20,6 +20,7 @@
#include "vba.h"
#include "button_mapping.h"
#include "audio.h"
#include "video.h"
#include "input.h"
#include "tbtime.h"
@ -298,6 +299,7 @@ u32 GetJoy(int pad)
#endif
)
{
StopAudio();
ConfigRequested = 1;
return 0;
}

2
source/ngc/menu.cpp
View File

@ -646,7 +646,6 @@ MainMenu (int selectedMenu)
{
tb_t start,end;
mftb(&start);
StopAudio();
int quit = 0;
int ret;
@ -738,7 +737,6 @@ MainMenu (int selectedMenu)
count++;
}
StartAudio();
mftb(&end);
loadtimeradjust += tb_diff_msec(&end, &start);
}