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Diffstat (limited to 'distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_xbios.c')
-rw-r--r--distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_xbios.c490
1 files changed, 490 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_xbios.c b/distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_xbios.c
new file mode 100644
index 0000000..42a0d4a
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_xbios.c
@@ -0,0 +1,490 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2012 Sam Lantinga
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this library; if not, write to the Free
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ Sam Lantinga
+ slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/*
+ MiNT audio driver
+ using XBIOS functions (Falcon)
+
+ Patrice Mandin, Didier Méquignon
+*/
+
+#include <unistd.h>
+#include <support.h>
+
+/* Mint includes */
+#include <mint/osbind.h>
+#include <mint/falcon.h>
+#include <mint/cookie.h>
+
+#include "SDL_audio.h"
+#include "../SDL_audio_c.h"
+#include "../SDL_sysaudio.h"
+
+#include "../../video/ataricommon/SDL_atarimxalloc_c.h"
+#include "../../video/ataricommon/SDL_atarisuper.h"
+
+#include "SDL_mintaudio.h"
+#include "SDL_mintaudio_dma8.h"
+
+/*--- Defines ---*/
+
+#define MINT_AUDIO_DRIVER_NAME "mint_xbios"
+
+/* Debug print info */
+#define DEBUG_NAME "audio:xbios: "
+#if 0
+#define DEBUG_PRINT(what) \
+ { \
+ printf what; \
+ }
+#else
+#define DEBUG_PRINT(what)
+#endif
+
+/*--- Static variables ---*/
+
+static long cookie_snd;
+
+/*--- Audio driver functions ---*/
+
+static void Mint_CloseAudio(_THIS);
+static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
+static void Mint_LockAudio(_THIS);
+static void Mint_UnlockAudio(_THIS);
+
+/* To check/init hardware audio */
+static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
+static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
+
+/*--- Audio driver bootstrap functions ---*/
+
+static int Audio_Available(void)
+{
+/* unsigned long dummy;*/
+ const char *envr = SDL_getenv("SDL_AUDIODRIVER");
+
+ /*SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);*/
+ SDL_MintAudio_mint_present = SDL_FALSE;
+
+ /* We can't use XBIOS in interrupt with Magic, don't know about thread */
+ /*if (Getcookie(C_MagX, &dummy) == C_FOUND) {
+ return(0);
+ }*/
+
+ /* Check if user asked a different audio driver */
+ if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
+ DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
+ return(0);
+ }
+
+ /* Cookie _SND present ? if not, assume ST machine */
+ if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
+ cookie_snd = SND_PSG;
+ }
+
+ /* Check if we have 16 bits audio */
+ if ((cookie_snd & SND_16BIT)==0) {
+ DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
+ return(0);
+ }
+
+ /* Check if audio is lockable */
+ if (Locksnd()!=1) {
+ DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
+ return(0);
+ }
+
+ Unlocksnd();
+
+ DEBUG_PRINT((DEBUG_NAME "XBIOS audio available!\n"));
+ return(1);
+}
+
+static void Audio_DeleteDevice(SDL_AudioDevice *device)
+{
+ SDL_free(device->hidden);
+ SDL_free(device);
+}
+
+static SDL_AudioDevice *Audio_CreateDevice(int devindex)
+{
+ SDL_AudioDevice *this;
+
+ /* Initialize all variables that we clean on shutdown */
+ this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
+ if ( this ) {
+ SDL_memset(this, 0, (sizeof *this));
+ this->hidden = (struct SDL_PrivateAudioData *)
+ SDL_malloc((sizeof *this->hidden));
+ }
+ if ( (this == NULL) || (this->hidden == NULL) ) {
+ SDL_OutOfMemory();
+ if ( this ) {
+ SDL_free(this);
+ }
+ return(0);
+ }
+ SDL_memset(this->hidden, 0, (sizeof *this->hidden));
+
+ /* Set the function pointers */
+ this->OpenAudio = Mint_OpenAudio;
+ this->CloseAudio = Mint_CloseAudio;
+ this->LockAudio = Mint_LockAudio;
+ this->UnlockAudio = Mint_UnlockAudio;
+ this->free = Audio_DeleteDevice;
+
+ return this;
+}
+
+AudioBootStrap MINTAUDIO_XBIOS_bootstrap = {
+ MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver",
+ Audio_Available, Audio_CreateDevice
+};
+
+static void Mint_LockAudio(_THIS)
+{
+ /* Stop replay */
+ Buffoper(0);
+}
+
+static void Mint_UnlockAudio(_THIS)
+{
+ /* Restart replay */
+ Buffoper(SB_PLA_ENA|SB_PLA_RPT);
+}
+
+static void Mint_CloseAudio(_THIS)
+{
+ /* Stop replay */
+ SDL_MintAudio_WaitThread();
+ Buffoper(0);
+
+ if (!SDL_MintAudio_mint_present) {
+ /* Uninstall interrupt */
+ Jdisint(MFP_DMASOUND);
+ }
+
+ /* Wait if currently playing sound */
+ while (SDL_MintAudio_mutex != 0) {
+ }
+
+ /* Clear buffers */
+ if (SDL_MintAudio_audiobuf[0]) {
+ Mfree(SDL_MintAudio_audiobuf[0]);
+ SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
+ }
+
+ /* Unlock sound system */
+ Unlocksnd();
+}
+
+/* Falcon XBIOS implementation of Devconnect() is buggy with external clock */
+static void Devconnect2(int src, int dst, int sclk, int pre)
+{
+ static const unsigned short MASK1[3] = { 0, 0x6000, 0 };
+ static const unsigned short MASK2[4] = { 0xFFF0, 0xFF8F, 0xF0FF, 0x0FFF };
+ static const unsigned short INDEX1[4] = { 1, 3, 5, 7 };
+ static const unsigned short INDEX2[4] = { 0, 2, 4, 6 };
+ unsigned short sync_div,dev_ctrl,dest_ctrl;
+ void *oldstack;
+
+ if (dst==0) {
+ return;
+ }
+
+ oldstack=(void *)Super(0);
+
+ dev_ctrl = DMAAUDIO_IO.dev_ctrl;
+ dest_ctrl = DMAAUDIO_IO.dest_ctrl;
+ dev_ctrl &= MASK2[src];
+
+ if (src==ADC) {
+ dev_ctrl |= MASK1[sclk];
+ } else {
+ dev_ctrl |= (INDEX1[sclk] << (src<<4));
+ }
+
+ if (dst & DMAREC) {
+ dest_ctrl &= 0xFFF0;
+ dest_ctrl |= INDEX1[src];
+ }
+
+ if (dst & DSPRECV) {
+ dest_ctrl &= 0xFF8F;
+ dest_ctrl |= (INDEX1[src]<<4);
+ }
+
+ if (dst & EXTOUT) {
+ dest_ctrl &= 0xF0FF;
+ dest_ctrl |= (INDEX1[src]<<8);
+ }
+
+ if (dst & DAC) {
+ dev_ctrl &= 0x0FFF;
+ dev_ctrl |= MASK1[sclk];
+ dest_ctrl &= 0x0FFF;
+ dest_ctrl |= (INDEX2[src]<<12);
+ }
+
+ sync_div = DMAAUDIO_IO.sync_div;
+ if (sclk==CLKEXT) {
+ pre<<=8;
+ sync_div &= 0xF0FF;
+ } else {
+ sync_div &= 0xFFF0;
+ }
+ sync_div |= pre;
+
+ DMAAUDIO_IO.dev_ctrl = dev_ctrl;
+ DMAAUDIO_IO.dest_ctrl = dest_ctrl;
+ DMAAUDIO_IO.sync_div = sync_div;
+
+ SuperToUser(oldstack);
+}
+
+static void Mint_CheckExternalClock(_THIS)
+{
+#define SIZE_BUF_CLOCK_MEASURE (44100/10)
+
+ char *buffer;
+ int i, j;
+
+ /* DSP present with its GPIO port ? */
+ 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);
+}
+
+static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
+{
+ int i;
+
+ DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
+ DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
+ DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
+ DEBUG_PRINT(("channels=%d, ", spec->channels));
+ DEBUG_PRINT(("freq=%d\n", spec->freq));
+
+ if (spec->channels > 2) {
+ spec->channels = 2; /* no more than stereo! */
+ }
+
+ spec->format |= 0x8000; /* Audio is always signed */
+ if ((spec->format & 0x00ff)==16) {
+ spec->format |= 0x1000; /* Audio is always big endian */
+ spec->channels=2; /* 16 bits always stereo */
+ }
+
+ MINTAUDIO_freqcount=0;
+
+ /* Add external clocks if present */
+ Mint_CheckExternalClock(this);
+
+ /* Standard clocks */
+ for (i=1;i<12;i++) {
+ /* Remove unusable Falcon codec predivisors */
+ if ((i==6) || (i==8) || (i==10)) {
+ continue;
+ }
+ SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), MASTERCLOCK_FALCON1, i, -1);
+ }
+
+#if 1
+ for (i=0; i<MINTAUDIO_freqcount; i++) {
+ DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
+ i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
+ MINTAUDIO_frequencies[i].predivisor
+ ));
+ }
+#endif
+
+ MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
+ spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
+
+ DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
+ DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
+ DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
+ DEBUG_PRINT(("channels=%d, ", spec->channels));
+ DEBUG_PRINT(("freq=%d\n", spec->freq));
+
+ return 0;
+}
+
+static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
+{
+ int channels_mode, 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"));
+ }
+
+ 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 int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
+{
+ /* Lock sound system */
+ if (Locksnd()!=1) {
+ SDL_SetError("Mint_OpenAudio: Audio system already in use");
+ return(-1);
+ }
+
+ SDL_MintAudio_device = this;
+
+ /* Check audio capabilities */
+ if (Mint_CheckAudio(this, spec)==-1) {
+ return -1;
+ }
+
+ SDL_CalculateAudioSpec(spec);
+
+ /* Allocate memory for audio buffers in DMA-able RAM */
+ DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
+
+ SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
+ if (SDL_MintAudio_audiobuf[0]==NULL) {
+ SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
+ return (-1);
+ }
+ SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
+ SDL_MintAudio_numbuf=0;
+ SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
+ SDL_MintAudio_audiosize = spec->size;
+ SDL_MintAudio_mutex = 0;
+
+ DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
+ DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
+
+ SDL_MintAudio_CheckFpu();
+
+ /* Setup audio hardware */
+ Mint_InitAudio(this, spec);
+
+ return(1); /* We don't use SDL threaded audio */
+}
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