--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/audio/dmedia/SDL_irixaudio.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,201 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998  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
+    5635-34 Springhouse Dr.
+    Pleasanton, CA 94588 (USA)
+    slouken@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Allow access to a raw mixing buffer (For IRIX 6.5 and higher) */
+
+#include <stdlib.h>
+
+#include "SDL_endian.h"
+#include "SDL_timer.h"
+#include "SDL_audio.h"
+#include "SDL_audiomem.h"
+#include "SDL_audio_c.h"
+#include "SDL_irixaudio.h"
+
+
+/* Audio driver functions */
+static int AL_OpenAudio(_THIS, SDL_AudioSpec *spec);
+static void AL_WaitAudio(_THIS);
+static void AL_PlayAudio(_THIS);
+static Uint8 *AL_GetAudioBuf(_THIS);
+static void AL_CloseAudio(_THIS);
+
+/* Audio driver bootstrap functions */
+
+static int Audio_Available(void)
+{
+	return 1;
+}
+
+static void Audio_DeleteDevice(SDL_AudioDevice *device)
+{
+	free(device->hidden);
+	free(device);
+}
+
+static SDL_AudioDevice *Audio_CreateDevice(int devindex)
+{
+	SDL_AudioDevice *this;
+
+	/* Initialize all variables that we clean on shutdown */
+	this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
+	if ( this ) {
+		memset(this, 0, (sizeof *this));
+		this->hidden = (struct SDL_PrivateAudioData *)
+				malloc((sizeof *this->hidden));
+	}
+	if ( (this == NULL) || (this->hidden == NULL) ) {
+		SDL_OutOfMemory();
+		if ( this ) {
+			free(this);
+		}
+		return(0);
+	}
+	memset(this->hidden, 0, (sizeof *this->hidden));
+
+	/* Set the function pointers */
+	this->OpenAudio = AL_OpenAudio;
+	this->WaitAudio = AL_WaitAudio;
+	this->PlayAudio = AL_PlayAudio;
+	this->GetAudioBuf = AL_GetAudioBuf;
+	this->CloseAudio = AL_CloseAudio;
+
+	this->free = Audio_DeleteDevice;
+
+	return this;
+}
+
+AudioBootStrap AUDIO_bootstrap = {
+	"AL", "IRIX DMedia audio",
+	Audio_Available, Audio_CreateDevice
+};
+
+
+void static AL_WaitAudio(_THIS)
+{
+	Sint32 timeleft;
+
+	timeleft = this->spec.samples - alGetFillable(audio_port);
+	if ( timeleft > 0 ) {
+		timeleft /= (this->spec.freq/1000);
+		SDL_Delay((Uint32)timeleft);
+	}
+}
+
+static void AL_PlayAudio(_THIS)
+{
+	/* Write the audio data out */
+	if ( alWriteFrames(audio_port, mixbuf, this->spec.samples) < 0 ) {
+		/* Assume fatal error, for now */
+		this->enabled = 0;
+	}
+}
+
+static Uint8 *AL_GetAudioBuf(_THIS)
+{
+	return(mixbuf);
+}
+
+static void AL_CloseAudio(_THIS)
+{
+	if ( mixbuf != NULL ) {
+		SDL_FreeAudioMem(mixbuf);
+		mixbuf = NULL;
+	}
+	if ( audio_port != NULL ) {
+		ALcloseport(audio_port);
+		audio_port = NULL;
+	}
+}
+
+static int AL_OpenAudio(_THIS, SDL_AudioSpec *spec)
+{
+	ALconfig audio_config;
+	ALpv audio_param;
+	int width;
+
+	/* Determine the audio parameters from the AudioSpec */
+	switch ( spec->format & 0xFF ) {
+
+		case 8: { /* Signed 8 bit audio data */
+			spec->format = AUDIO_S8;
+			width = AL_SAMPLE_8;
+		}
+		break;
+
+		case 16: { /* Signed 16 bit audio data */
+			spec->format = AUDIO_S16MSB;
+			width = AL_SAMPLE_16;
+		}
+		break;
+
+		default: {
+			SDL_SetError("Unsupported audio format");
+			return(-1);
+		}
+	}
+
+	/* Update the fragment size as size in bytes */
+	SDL_CalculateAudioSpec(spec);
+
+	/* Set output frequency */
+	audio_param.param = AL_RATE;
+	audio_param.value.i = spec->freq;
+	if( alSetParams(AL_DEFAULT_OUTPUT, &audio_param, 1) < 0 ) {
+		SDL_SetError("alSetParams failed");
+		return(-1);
+	}
+
+	/* Open the audio port with the requested frequency */
+	audio_port = NULL;
+	audio_config = alNewConfig();
+	if ( audio_config &&
+	     (alSetSampFmt(audio_config, AL_SAMPFMT_TWOSCOMP) >= 0) &&
+	     (alSetWidth(audio_config, width) >= 0) &&
+	     (alSetQueueSize(audio_config, spec->samples*2) >= 0) &&
+	     (alSetChannels(audio_config, spec->channels) >= 0) ) {
+		audio_port = ALopenport("SDL audio", "w", audio_config);
+	}
+	alFreeConfig(audio_config);
+	if( audio_port == NULL ) {
+		SDL_SetError("Unable to open audio port");
+		return(-1);
+	}
+
+	/* Allocate mixing buffer */
+	mixbuf = (Uint8 *)SDL_AllocAudioMem(spec->size);
+	if ( mixbuf == NULL ) {
+		SDL_OutOfMemory();
+		return(-1);
+	}
+	memset(mixbuf, spec->silence, spec->size);
+
+	/* We're ready to rock and roll. :-) */
+	return(0);
+}