static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
{
int channels_mode, prediv;
void *buffer;
Buffoper(0);
Settracks(0,0);
Setmontracks(0);
switch (spec->format & 0xff) {
case 8:
if (spec->channels==2) {
channels_mode=STEREO8;
} else {
channels_mode=MONO8;
}
break;
case 16:
if (spec->channels==2) {
channels_mode=STEREO16;
} else {
channels_mode=MONO16;
}
break;
default:
channels_mode=STEREO16;
break;
}
if (Setmode(channels_mode)<0) {
DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
}
prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
if (Setbuffer(0, buffer, buffer + spec->size)<0) {
DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
}
if (NSetinterrupt(2, SI_PLAY, Mint_GsxbInterrupt)<0) {
DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
}
Buffoper(SB_PLA_ENA|SB_PLA_RPT);
DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
}
static void Mint_GsxbInterrupt(void)
{
Uint8 *newbuf;
if (SDL_MintAudio_mutex)
return;
SDL_MintAudio_mutex=1;
SDL_MintAudio_numbuf ^= 1;
SDL_MintAudio_Callback();
newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
SDL_MintAudio_mutex=0;
}
static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
{
int channels_mode, prediv;
void *buffer;
SDL_MintAudio_quit_thread = SDL_FALSE;
SDL_MintAudio_thread_finished = SDL_TRUE;
SDL_MintAudio_WaitThread();
Buffoper(0);
Settracks(0,0);
Setmontracks(0);
channels_mode=STEREO16;
switch (spec->format & 0xff) {
case 8:
if (spec->channels==2) {
channels_mode=STEREO8;
} else {
channels_mode=MONO8;
}
break;
}
if (Setmode(channels_mode)<0) {
DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
}
prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
Gpio(GPIO_SET,7);
Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
Devconnect2(DMAPLAY, DAC|EXTOUT, CLKEXT, prediv);
} else {
Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
}
buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
if (Setbuffer(0, buffer, buffer + spec->size)<0) {
DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
}
if (SDL_MintAudio_mint_present) {
SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
} else {
Jdisint(MFP_DMASOUND);
Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
Jenabint(MFP_DMASOUND);
if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
}
}
Buffoper(SB_PLA_ENA|SB_PLA_RPT);
DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
}
static void Mint_CheckExternalClock(_THIS)
{
#define SIZE_BUF_CLOCK_MEASURE (44100/10)
char *buffer;
int i, j;
if ((cookie_snd & SND_DSP)==0) {
return;
}
buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM);
if (buffer==NULL) {
DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n"));
return;
}
SDL_memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
Buffoper(0);
Settracks(0,0);
Setmontracks(0);
Setmode(MONO8);
Jdisint(MFP_TIMERA);
for (i=0; i<2; i++) {
Gpio(GPIO_SET,7);
Gpio(GPIO_WRITE,2+i);
Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K);
Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE);
Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock);
Jenabint(MFP_TIMERA);
SDL_MintAudio_clocktics = 0;
Buffoper(SB_PLA_ENA);
usleep(110000);
if((Buffoper(-1) & 1)==0) {
if (SDL_MintAudio_clocktics) {
unsigned long khz;
khz = ((SIZE_BUF_CLOCK_MEASURE/SDL_MintAudio_clocktics) +1) & 0xFFFFFFFE;
DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n", i+1, khz));
if(khz==44) {
for (j=1; j<4; j++) {
SDL_MintAudio_AddFrequency(this, MASTERCLOCK_44K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_44K, (1<<j)-1, 2+i);
}
} else if (khz==48) {
for (j=1; j<4; j++) {
SDL_MintAudio_AddFrequency(this, MASTERCLOCK_48K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_48K, (1<<j)-1, 2+i);
}
}
} else {
DEBUG_PRINT((DEBUG_NAME "No measure\n"));
}
} else {
DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n"));
}
Buffoper(0);
Jdisint(MFP_TIMERA);
}
Mfree(buffer);
}
static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
{
int channels_mode, dmaclock, prediv;
void *buffer;
/* Stop currently playing sound */
SDL_MintAudio_quit_thread = SDL_FALSE;
SDL_MintAudio_thread_finished = SDL_TRUE;
SDL_MintAudio_WaitThread();
Buffoper(0);
/* Set replay tracks */
Settracks(0,0);
Setmontracks(0);
/* Select replay format */
channels_mode=STEREO16;
switch (spec->format & 0xff) {
case 8:
if (spec->channels==2) {
channels_mode=STEREO8;
} else {
channels_mode=MONO8;
}
break;
}
if (Setmode(channels_mode)<0) {
DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
}
dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
Gpio(GPIO_SET,7); /* DSP port gpio outputs */
Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
Devconnect2(DMAPLAY, DAC|EXTOUT, CLKEXT, prediv);
} else {
Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
}
/* Set buffer */
buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
if (Setbuffer(0, buffer, buffer + spec->size)<0) {
DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
}
if (SDL_MintAudio_mint_present) {
SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
} else {
/* Install interrupt */
Jdisint(MFP_DMASOUND);
/*Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);*/
Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
Jenabint(MFP_DMASOUND);
if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
}
}
/* Go */
Buffoper(SB_PLA_ENA|SB_PLA_RPT);
DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
}
static void Mint_CheckExternalClock(_THIS)
{
#define SIZE_BUF_CLOCK_MEASURE (44100/10)
unsigned long cookie_snd;
char *buffer;
int i, j;
/* DSP present with its GPIO port ? */
if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
return;
}
if ((cookie_snd & SND_DSP)==0) {
return;
}
buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM);
if (buffer==NULL) {
DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n"));
return;
}
SDL_memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
Buffoper(0);
Settracks(0,0);
Setmontracks(0);
Setmode(MONO8);
Jdisint(MFP_TIMERA);
for (i=0; i<2; i++) {
Gpio(GPIO_SET,7); /* DSP port gpio outputs */
Gpio(GPIO_WRITE,2+i); /* 22.5792/24.576 MHz for 44.1/48KHz */
Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K); /* Matrix and clock source */
Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE); /* Set buffer */
Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock); /* delay mode timer A, prediv /64, 1KHz */
Jenabint(MFP_TIMERA);
SDL_MintAudio_clocktics = 0;
Buffoper(SB_PLA_ENA);
usleep(110000);
if((Buffoper(-1) & 1)==0) {
if (SDL_MintAudio_clocktics) {
unsigned long khz;
khz = ((SIZE_BUF_CLOCK_MEASURE/SDL_MintAudio_clocktics) +1) & 0xFFFFFFFE;
DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n", i+1, khz));
if(khz==44) {
for (j=1; j<4; j++) {
SDL_MintAudio_AddFrequency(this, MASTERCLOCK_44K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_44K, (1<<j)-1, 2+i);
}
} else if (khz==48) {
for (j=1; j<4; j++) {
SDL_MintAudio_AddFrequency(this, MASTERCLOCK_48K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_48K, (1<<j)-1, 2+i);
}
}
} else {
DEBUG_PRINT((DEBUG_NAME "No measure\n"));
}
} else {
DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n"));
}
Buffoper(0); /* stop */
Jdisint(MFP_TIMERA); /* Uninstall interrupt */
}
Mfree(buffer);
}