--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cdrom/SDL_cdrom.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,350 @@
+/*
+    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
+
+/* This is the CD-audio control API for Simple DirectMedia Layer */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL_error.h"
+#include "SDL_cdrom.h"
+#include "SDL_syscdrom.h"
+
+#if !defined(macintosh)
+#define CLIP_FRAMES	10	/* Some CD-ROMs won't go all the way */
+#endif
+
+static int SDL_cdinitted = 0;
+static SDL_CD *default_cdrom;
+
+/* The system level CD-ROM control functions */
+struct CDcaps SDL_CDcaps = {
+	NULL,					/* Name */
+	NULL,					/* Open */
+	NULL,					/* GetTOC */
+	NULL,					/* Status */
+	NULL,					/* Play */
+	NULL,					/* Pause */
+	NULL,					/* Resume */
+	NULL,					/* Stop */
+	NULL,					/* Eject */
+	NULL,					/* Close */
+};
+int SDL_numcds;
+
+int SDL_CDROMInit(void)
+{
+	int retval;
+
+	SDL_numcds = 0;
+	retval = SDL_SYS_CDInit();
+	if ( retval == 0 ) {
+		SDL_cdinitted = 1;
+	}
+	default_cdrom = NULL;
+	return(retval);
+}
+
+/* Check to see if the CD-ROM subsystem has been initialized */
+static int CheckInit(int check_cdrom, SDL_CD **cdrom)
+{
+	int okay;
+
+	okay = SDL_cdinitted;
+	if ( check_cdrom && (*cdrom == NULL) ) {
+		*cdrom = default_cdrom;
+		if ( *cdrom == NULL ) {
+			SDL_SetError("CD-ROM not opened");
+			okay = 0;
+		}
+	}
+	if ( ! SDL_cdinitted ) {
+		SDL_SetError("CD-ROM subsystem not initialized");
+	}
+	return(okay);
+}
+
+int SDL_CDNumDrives(void)
+{
+	if ( ! CheckInit(0, NULL) ) {
+		return(-1);
+	}
+	return(SDL_numcds);
+}
+
+const char *SDL_CDName(int drive)
+{
+	if ( ! CheckInit(0, NULL) ) {
+		return(NULL);
+	}
+	if ( drive >= SDL_numcds ) {
+		SDL_SetError("Invalid CD-ROM drive index");
+		return(NULL);
+	}
+	if ( SDL_CDcaps.Name ) {
+		return(SDL_CDcaps.Name(drive));
+	} else {
+		return("");
+	}
+}
+
+SDL_CD *SDL_CDOpen(int drive)
+{
+	struct SDL_CD *cdrom;
+
+	if ( ! CheckInit(0, NULL) ) {
+		return(NULL);
+	}
+	if ( drive >= SDL_numcds ) {
+		SDL_SetError("Invalid CD-ROM drive index");
+		return(NULL);
+	}
+	cdrom = (SDL_CD *)malloc(sizeof(*cdrom));
+	if ( cdrom == NULL ) {
+		SDL_OutOfMemory();
+		return(NULL);
+	}
+	memset(cdrom, 0, sizeof(*cdrom));
+	cdrom->id = SDL_CDcaps.Open(drive);
+	if ( cdrom->id < 0 ) {
+		free(cdrom);
+		return(NULL);
+	}
+	default_cdrom = cdrom;
+	return(cdrom);
+}
+
+CDstatus SDL_CDStatus(SDL_CD *cdrom)
+{
+	CDstatus status;
+	int i;
+	Uint32 position;
+
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return(CD_ERROR);
+	}
+
+	/* Get the current status of the drive */
+	cdrom->numtracks = 0;
+	cdrom->cur_track = 0;
+	cdrom->cur_frame = 0;
+	status = SDL_CDcaps.Status(cdrom, &i);
+	position = (Uint32)i;
+	cdrom->status = status;
+
+	/* Get the table of contents, if there's a CD available */
+	if ( CD_INDRIVE(status) ) {
+		if ( SDL_CDcaps.GetTOC(cdrom) < 0 ) {
+			status = CD_ERROR;
+		}
+		/* If the drive is playing, get current play position */
+		if ( (status == CD_PLAYING) || (status == CD_PAUSED) ) {
+			for ( i=1; cdrom->track[i].offset <= position; ++i ) {
+				/* Keep looking */;
+			}
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Current position: %d, track = %d (offset is %d)\n",
+				position, i-1, cdrom->track[i-1].offset);
+#endif
+			cdrom->cur_track = i-1;
+			position -= cdrom->track[cdrom->cur_track].offset;
+			cdrom->cur_frame = position;
+		}
+	}
+	return(status);
+}
+
+int SDL_CDPlayTracks(SDL_CD *cdrom,
+			int strack, int sframe, int ntracks, int nframes)
+{
+	int etrack, eframe;
+	int start, length;
+
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return(CD_ERROR);
+	}
+
+	/* Determine the starting and ending tracks */
+	if ( (strack < 0) || (strack >= cdrom->numtracks) ) {
+		SDL_SetError("Invalid starting track");
+		return(CD_ERROR);
+	}
+	if ( ! ntracks && ! nframes ) {
+		etrack = cdrom->numtracks;
+		eframe = 0;
+	} else {
+		etrack = strack+ntracks;
+		if ( etrack == strack ) {
+			eframe = sframe + nframes;
+		} else {
+			eframe = nframes;
+		}
+	}
+	if ( etrack > cdrom->numtracks ) {
+		SDL_SetError("Invalid play length");
+		return(CD_ERROR);
+	}
+
+	/* Skip data tracks and verify frame offsets */
+	while ( (strack <= etrack) &&
+			(cdrom->track[strack].type == SDL_DATA_TRACK) ) {
+		++strack;
+	}
+	if ( sframe >= (int)cdrom->track[strack].length ) {
+		SDL_SetError("Invalid starting frame for track %d", strack);
+		return(CD_ERROR);
+	}
+	while ( (etrack > strack) &&
+			(cdrom->track[etrack-1].type == SDL_DATA_TRACK) ) {
+		--etrack;
+	}
+	if ( eframe > (int)cdrom->track[etrack].length ) {
+		SDL_SetError("Invalid ending frame for track %d", etrack);
+		return(CD_ERROR);
+	}
+
+	/* Determine start frame and play length */
+	start = (cdrom->track[strack].offset+sframe);
+	length = (cdrom->track[etrack].offset+eframe)-start;
+#ifdef CLIP_FRAMES
+	/* I've never seen this necessary, but xmcd does it.. */
+	length -= CLIP_FRAMES;	/* CLIP_FRAMES == 10 */
+#endif
+	if ( length < 0 ) {
+		return(0);
+	}
+
+	/* Play! */
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Playing %d frames at offset %d\n", length, start);
+#endif
+	return(SDL_CDcaps.Play(cdrom, start, length));
+}
+
+int SDL_CDPlay(SDL_CD *cdrom, int sframe, int length)
+{
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return(CD_ERROR);
+	}
+
+	return(SDL_CDcaps.Play(cdrom, sframe, length));
+}
+
+int SDL_CDPause(SDL_CD *cdrom)
+{
+	CDstatus status;
+	int retval;
+
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return(CD_ERROR);
+	}
+
+	status = SDL_CDcaps.Status(cdrom, NULL);
+	switch (status) {
+		case CD_PLAYING:
+			retval = SDL_CDcaps.Pause(cdrom);
+			break;
+		default:
+			retval = 0;
+			break;
+	}
+	return(retval);
+}
+
+int SDL_CDResume(SDL_CD *cdrom)
+{
+	CDstatus status;
+	int retval;
+
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return(CD_ERROR);
+	}
+
+	status = SDL_CDcaps.Status(cdrom, NULL);
+	switch (status) {
+		case CD_PAUSED:
+			retval = SDL_CDcaps.Resume(cdrom);
+		default:
+			retval = 0;
+			break;
+	}
+	return(retval);
+}
+
+int SDL_CDStop(SDL_CD *cdrom)
+{
+	CDstatus status;
+	int retval;
+
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return(CD_ERROR);
+	}
+
+	status = SDL_CDcaps.Status(cdrom, NULL);
+	switch (status) {
+		case CD_PLAYING:
+		case CD_PAUSED:
+			retval = SDL_CDcaps.Stop(cdrom);
+		default:
+			retval = 0;
+			break;
+	}
+	return(retval);
+}
+
+int SDL_CDEject(SDL_CD *cdrom)
+{
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return(CD_ERROR);
+	}
+	return(SDL_CDcaps.Eject(cdrom));
+}
+
+void SDL_CDClose(SDL_CD *cdrom)
+{
+	/* Check if the CD-ROM subsystem has been initialized */
+	if ( ! CheckInit(1, &cdrom) ) {
+		return;
+	}
+	SDL_CDcaps.Close(cdrom);
+	free(cdrom);
+	default_cdrom = NULL;
+}
+
+void SDL_CDROMQuit(void)
+{
+	SDL_SYS_CDQuit();
+	SDL_cdinitted = 0;
+}