Import SDL release-1.2.15

Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf

1 files changed, 405 insertions, 0 deletions

diff --git a/distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_mcsn.c b/distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_mcsn.c
new file mode 100644
index 0000000..387609b
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/audio/mint/SDL_mintaudio_mcsn.c
@@ -0,0 +1,405 @@
+/*
+    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 (MacSound compatible driver)
+
+	Patrice Mandin
+*/
+
+#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_mcsn.h"
+
+/*--- Defines ---*/
+
+#define MINT_AUDIO_DRIVER_NAME "mint_mcsn"
+
+/* Debug print info */
+#define DEBUG_NAME "audio:mcsn: "
+#if 0
+#define DEBUG_PRINT(what) \
+	{ \
+		printf what; \
+	}
+#else
+#define DEBUG_PRINT(what)
+#endif
+
+/*--- Static variables ---*/
+
+static long cookie_snd, cookie_mch;
+static cookie_mcsn_t *cookie_mcsn;
+
+/*--- 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)
+{
+	long dummy;
+	const char *envr = SDL_getenv("SDL_AUDIODRIVER");
+
+	SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
+
+	/* 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 _MCH present ? if not, assume ST machine */
+	if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
+		cookie_mch = MCH_ST;
+	}
+
+	/* 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);
+	}
+
+	/* Cookie MCSN present ? */
+	if (Getcookie(C_McSn, &dummy) != C_FOUND) {
+		DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n"));
+		return(0);
+	}
+	cookie_mcsn = (cookie_mcsn_t *) dummy;
+
+	/* Check if interrupt at end of replay */
+	if (cookie_mcsn->pint == 0) {
+		DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\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 "MCSN 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_MCSN_bootstrap = {
+	MINT_AUDIO_DRIVER_NAME, "MiNT MCSN 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();
+}
+
+static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
+{
+	int i;
+	unsigned long masterclock, masterprediv;
+
+	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! */
+    }
+
+	/* Check formats available */
+	MINTAUDIO_freqcount=0;
+	switch(cookie_mcsn->play) {
+		case MCSN_ST:
+			spec->channels=1;
+			spec->format=8; /* FIXME: is it signed or unsigned ? */
+			SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1);
+			break;
+		case MCSN_TT:	/* Also STE, Mega STE */
+			spec->format=AUDIO_S8;
+			masterclock=MASTERCLOCK_STE;
+			masterprediv=MASTERPREDIV_STE;
+			if ((cookie_mch>>16)==MCH_TT) {
+				masterclock=MASTERCLOCK_TT;
+				masterprediv=MASTERPREDIV_TT;
+			}
+			for (i=0; i<4; i++) {
+				SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)),
+					masterclock, 3-i, -1);
+			}
+			break;
+		case MCSN_FALCON:	/* Also Mac */
+			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)),
+					CLK25M, i+1, -1);
+			}
+			if (cookie_mcsn->res1 != 0) {
+				for (i=1; i<4; i++) {
+					SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)),
+						CLKEXT, (1<<i)-1, -1);
+				}
+			}
+			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 */
+			}
+			break;
+	}
+
+#if 0
+	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, dmaclock;
+	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;
+	switch(cookie_mcsn->play) {
+		case MCSN_TT:
+			Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1);
+			Soundcmd(SETPRESCALE, prediv);
+			DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n"));
+			break;
+		case MCSN_FALCON:
+			Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1);
+			DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n"));
+			break;
+	}
+
+	/* 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);
+		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 */
+}