--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/audio/SDL_sysaudio.h	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,142 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#ifndef _SDL_sysaudio_h
+#define _SDL_sysaudio_h
+
+#include "SDL_mutex.h"
+#include "SDL_thread.h"
+
+/* The SDL audio driver */
+typedef struct SDL_AudioDevice SDL_AudioDevice;
+
+/* Define the SDL audio driver structure */
+#define _THIS	SDL_AudioDevice *_this
+#ifndef _STATUS
+#define _STATUS	SDL_status *status
+#endif
+struct SDL_AudioDevice {
+	/* * * */
+	/* The name of this audio driver */
+	const char *name;
+
+	/* * * */
+	/* The description of this audio driver */
+	const char *desc;
+
+	/* * * */
+	/* Public driver functions */
+	int  (*OpenAudio)(_THIS, SDL_AudioSpec *spec);
+	void (*ThreadInit)(_THIS);	/* Called by audio thread at start */
+	void (*WaitAudio)(_THIS);
+	void (*PlayAudio)(_THIS);
+	Uint8 *(*GetAudioBuf)(_THIS);
+	void (*WaitDone)(_THIS);
+	void (*CloseAudio)(_THIS);
+
+	/* * * */
+	/* Data common to all devices */
+
+	/* The current audio specification (shared with audio thread) */
+	SDL_AudioSpec spec;
+
+	/* An audio conversion block for audio format emulation */
+	SDL_AudioCVT convert;
+
+	/* Current state flags */
+	int enabled;
+	int paused;
+	int opened;
+
+	/* Fake audio buffer for when the audio hardware is busy */
+	Uint8 *fake_stream;
+
+	/* A semaphore for locking the mixing buffers */
+	SDL_mutex *mixer_lock;
+
+	/* A thread to feed the audio device */
+	SDL_Thread *thread;
+	Uint32 threadid;
+
+	/* * * */
+	/* Data private to this driver */
+	struct SDL_PrivateAudioData *hidden;
+
+	/* * * */
+	/* The function used to dispose of this structure */
+	void (*free)(_THIS);
+};
+#undef _THIS
+
+typedef struct AudioBootStrap {
+	const char *name;
+	const char *desc;
+	int (*available)(void);
+	SDL_AudioDevice *(*create)(int devindex);
+} AudioBootStrap;
+
+#if defined(unix) && \
+   !defined(linux) && !defined(__FreeBSD__) && !defined(__CYGWIN32__) \
+   && !defined(__bsdi__)
+extern AudioBootStrap AUDIO_bootstrap;
+#endif
+#ifdef OSS_SUPPORT
+extern AudioBootStrap DSP_bootstrap;
+extern AudioBootStrap DMA_bootstrap;
+#endif
+#ifdef ALSA_SUPPORT
+extern AudioBootStrap ALSA_bootstrap;
+#endif
+#ifdef ARTSC_SUPPORT
+extern AudioBootStrap ARTSC_bootstrap;
+#endif
+#ifdef ESD_SUPPORT
+extern AudioBootStrap ESD_bootstrap;
+#endif
+#ifdef NAS_SUPPORT
+extern AudioBootStrap NAS_bootstrap;
+#endif
+#ifdef ENABLE_DIRECTX
+extern AudioBootStrap DSOUND_bootstrap;
+#endif
+#ifdef ENABLE_WINDIB
+extern AudioBootStrap WAVEOUT_bootstrap;
+#endif
+#ifdef __BEOS__
+extern AudioBootStrap BAUDIO_bootstrap;
+#endif
+#if defined(macintosh) || TARGET_API_MAC_CARBON
+extern AudioBootStrap SNDMGR_bootstrap;
+#endif
+#ifdef _AIX
+extern AudioBootStrap Paud_bootstrap;
+#endif
+
+/* This is the current audio device */
+extern SDL_AudioDevice *current_audio;
+
+#endif /* _SDL_sysaudio_h */