--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/libsdl-trunk/src/audio/mint/SDL_mintaudio_xbios.c	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,495 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2004 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 "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 unsigned 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;
+
+	Super(oldstack);
+}
+
+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);
+}
+
+static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
+{
+	int i;
+	Uint32 extclock;
+
+	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, 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 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 */
+}