src/cdrom/win32/SDL_syscdrom.c - third_party/sdl - Git at Google

 /*
     SDL - Simple DirectMedia Layer
     Copyright (C) 1997-2009 Sam Lantinga

     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 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
     Lesser General Public License for more details.

     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

     Sam Lantinga
     slouken@libsdl.org
 */
 #include "SDL_config.h"

 #ifdef SDL_CDROM_WIN32

 /* Functions for system-level CD-ROM audio control */

 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <mmsystem.h>

 #include "SDL_cdrom.h"
 #include "../SDL_syscdrom.h"

 /* This really broken?? */
 #define BROKEN_MCI_PAUSE	/* Pausing actually stops play -- Doh! */

 /* The maximum number of CD-ROM drives we'll detect (Don't change!) */
 #define MAX_DRIVES	26

 /* A list of available CD-ROM drives */
 static char *SDL_cdlist[MAX_DRIVES];
 static MCIDEVICEID SDL_mciID[MAX_DRIVES];
 #ifdef BROKEN_MCI_PAUSE
 static int SDL_paused[MAX_DRIVES];
 #endif
 static int SDL_CD_end_position;

 /* The system-dependent CD control functions */
 static const char *SDL_SYS_CDName(int drive);
 static int SDL_SYS_CDOpen(int drive);
 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
 static int SDL_SYS_CDPause(SDL_CD *cdrom);
 static int SDL_SYS_CDResume(SDL_CD *cdrom);
 static int SDL_SYS_CDStop(SDL_CD *cdrom);
 static int SDL_SYS_CDEject(SDL_CD *cdrom);
 static void SDL_SYS_CDClose(SDL_CD *cdrom);


 /* Add a CD-ROM drive to our list of valid drives */
 static void AddDrive(char *drive)
 {
 	int i;

 	if ( SDL_numcds < MAX_DRIVES ) {
 		/* Add this drive to our list */
 		i = SDL_numcds;
 		SDL_cdlist[i] = SDL_strdup(drive);
 		if ( SDL_cdlist[i] == NULL ) {
 			SDL_OutOfMemory();
 			return;
 		}
 		++SDL_numcds;
 #ifdef CDROM_DEBUG
   fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
 #endif
 	}
 }

 int  SDL_SYS_CDInit(void)
 {
 	/* checklist: Drive 'A' - 'Z' */
 	int i;
 	char drive[4];

 	/* Fill in our driver capabilities */
 	SDL_CDcaps.Name = SDL_SYS_CDName;
 	SDL_CDcaps.Open = SDL_SYS_CDOpen;
 	SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
 	SDL_CDcaps.Status = SDL_SYS_CDStatus;
 	SDL_CDcaps.Play = SDL_SYS_CDPlay;
 	SDL_CDcaps.Pause = SDL_SYS_CDPause;
 	SDL_CDcaps.Resume = SDL_SYS_CDResume;
 	SDL_CDcaps.Stop = SDL_SYS_CDStop;
 	SDL_CDcaps.Eject = SDL_SYS_CDEject;
 	SDL_CDcaps.Close = SDL_SYS_CDClose;

 	/* Scan the system for CD-ROM drives */
 	for ( i='A'; i<='Z'; ++i ) {
 		SDL_snprintf(drive, SDL_arraysize(drive), "%c:\\", i);
 		if ( GetDriveType(drive) == DRIVE_CDROM ) {
 			AddDrive(drive);
 		}
 	}
 	SDL_memset(SDL_mciID, 0, sizeof(SDL_mciID));
 	return(0);
 }

 /* General ioctl() CD-ROM command function */
 static int SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg)
 {
 	MCIERROR mci_error;

 	mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD_PTR)arg);
 	if ( mci_error ) {
 		char error[256];

 		mciGetErrorString(mci_error, error, 256);
 		SDL_SetError("mciSendCommand() error: %s", error);
 	}
 	return(!mci_error ? 0 : -1);
 }

 static const char *SDL_SYS_CDName(int drive)
 {
 	return(SDL_cdlist[drive]);
 }

 static int SDL_SYS_CDOpen(int drive)
 {
 	MCI_OPEN_PARMS mci_open;
 	MCI_SET_PARMS mci_set;
 	char device[3];
 	DWORD flags;

 	/* Open the requested device */
 	mci_open.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO;
 	device[0] = *SDL_cdlist[drive];
 	device[1] = ':';
 	device[2] = '\0';
 	mci_open.lpstrElementName = device;
 	flags =
 	  (MCI_OPEN_TYPE|MCI_OPEN_SHAREABLE|MCI_OPEN_TYPE_ID|MCI_OPEN_ELEMENT);
 	if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
 		flags &= ~MCI_OPEN_SHAREABLE;
 		if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
 			return(-1);
 		}
 	}
 	SDL_mciID[drive] = mci_open.wDeviceID;

 	/* Set the minute-second-frame time format */
 	mci_set.dwTimeFormat = MCI_FORMAT_MSF;
 	SDL_SYS_CDioctl(drive, MCI_SET, MCI_SET_TIME_FORMAT, &mci_set);

 #ifdef BROKEN_MCI_PAUSE
 	SDL_paused[drive] = 0;
 #endif
 	return(drive);
 }

 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
 {
 	MCI_STATUS_PARMS mci_status;
 	int i, okay;
 	DWORD flags;

 	okay = 0;
 	mci_status.dwItem = MCI_STATUS_NUMBER_OF_TRACKS;
 	flags = MCI_STATUS_ITEM | MCI_WAIT;
 	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
 		cdrom->numtracks = mci_status.dwReturn;
 		if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
 			cdrom->numtracks = SDL_MAX_TRACKS;
 		}
 		/* Read all the track TOC entries */
 		flags = MCI_STATUS_ITEM | MCI_TRACK | MCI_WAIT;
 		for ( i=0; i<cdrom->numtracks; ++i ) {
 			cdrom->track[i].id = i+1;
 			mci_status.dwTrack = cdrom->track[i].id;
 #ifdef MCI_CDA_STATUS_TYPE_TRACK
 			mci_status.dwItem = MCI_CDA_STATUS_TYPE_TRACK;
 			if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
 							&mci_status) < 0 ) {
 				break;
 			}
 			if ( mci_status.dwReturn == MCI_CDA_TRACK_AUDIO ) {
 				cdrom->track[i].type = SDL_AUDIO_TRACK;
 			} else {
 				cdrom->track[i].type = SDL_DATA_TRACK;
 			}
 #else
 			cdrom->track[i].type = SDL_AUDIO_TRACK;
 #endif
 			mci_status.dwItem = MCI_STATUS_POSITION;
 			if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
 							&mci_status) < 0 ) {
 				break;
 			}
 			cdrom->track[i].offset = MSF_TO_FRAMES(
 					MCI_MSF_MINUTE(mci_status.dwReturn),
 					MCI_MSF_SECOND(mci_status.dwReturn),
 					MCI_MSF_FRAME(mci_status.dwReturn));
 			cdrom->track[i].length = 0;
 			if ( i > 0 ) {
 				cdrom->track[i-1].length =
 						cdrom->track[i].offset-
 						cdrom->track[i-1].offset;
 			}
 		}
 		if ( i == cdrom->numtracks ) {
 			mci_status.dwTrack = cdrom->track[i - 1].id;
 			mci_status.dwItem = MCI_STATUS_LENGTH;
 			if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
 							&mci_status) == 0 ) {
 				cdrom->track[i - 1].length = MSF_TO_FRAMES(
 					MCI_MSF_MINUTE(mci_status.dwReturn),
 					MCI_MSF_SECOND(mci_status.dwReturn),
 					MCI_MSF_FRAME(mci_status.dwReturn));
 				/* compute lead-out offset */
 				cdrom->track[i].offset = cdrom->track[i - 1].offset +
 					cdrom->track[i - 1].length;
 				cdrom->track[i].length = 0;
 				okay = 1;
 			}
 		}
 	}
 	return(okay ? 0 : -1);
 }

 /* Get CD-ROM status */
 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
 {
 	CDstatus status;
 	MCI_STATUS_PARMS mci_status;
 	DWORD flags;

 	flags = MCI_STATUS_ITEM | MCI_WAIT;
 	mci_status.dwItem = MCI_STATUS_MODE;
 	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) < 0 ) {
 		status = CD_ERROR;
 	} else {
 		switch (mci_status.dwReturn) {
 			case MCI_MODE_NOT_READY:
 			case MCI_MODE_OPEN:
 				status = CD_TRAYEMPTY;
 				break;
 			case MCI_MODE_STOP:
 #ifdef BROKEN_MCI_PAUSE
 				if ( SDL_paused[cdrom->id] ) {
 					status = CD_PAUSED;
 				} else {
 					status = CD_STOPPED;
 				}
 #else
 				status = CD_STOPPED;
 #endif /* BROKEN_MCI_PAUSE */
 				break;
 			case MCI_MODE_PLAY:
 #ifdef BROKEN_MCI_PAUSE
 				if ( SDL_paused[cdrom->id] ) {
 					status = CD_PAUSED;
 				} else {
 					status = CD_PLAYING;
 				}
 #else
 				status = CD_PLAYING;
 #endif /* BROKEN_MCI_PAUSE */
 				break;
 			case MCI_MODE_PAUSE:
 				status = CD_PAUSED;
 				break;
 			default:
 				status = CD_ERROR;
 				break;
 		}
 	}
 	if ( position ) {
 		if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
 			mci_status.dwItem = MCI_STATUS_POSITION;
 			if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
 							&mci_status) == 0 ) {
 				*position = MSF_TO_FRAMES(
 					MCI_MSF_MINUTE(mci_status.dwReturn),
 					MCI_MSF_SECOND(mci_status.dwReturn),
 					MCI_MSF_FRAME(mci_status.dwReturn));
 			} else {
 				*position = 0;
 			}
 		} else {
 			*position = 0;
 		}
 	}
 	return(status);
 }

 /* Start play */
 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
 {
 	MCI_PLAY_PARMS mci_play;
 	int m, s, f;
 	DWORD flags;

 	flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
 	mci_play.dwCallback = 0;
 	FRAMES_TO_MSF(start, &m, &s, &f);
 	mci_play.dwFrom = MCI_MAKE_MSF(m, s, f);
 	FRAMES_TO_MSF(start+length, &m, &s, &f);
 	mci_play.dwTo = MCI_MAKE_MSF(m, s, f);
 	SDL_CD_end_position = mci_play.dwTo;
 	return(SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play));
 }

 /* Pause play */
 static int SDL_SYS_CDPause(SDL_CD *cdrom)
 {
 #ifdef BROKEN_MCI_PAUSE
 	SDL_paused[cdrom->id] = 1;
 #endif
 	return(SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL));
 }

 /* Resume play */
 static int SDL_SYS_CDResume(SDL_CD *cdrom)
 {
 #ifdef BROKEN_MCI_PAUSE
 	MCI_STATUS_PARMS mci_status;
 	int okay;
 	int flags;

 	okay = 0;
 	/* Play from the current play position to the end position set earlier */
 	flags = MCI_STATUS_ITEM | MCI_WAIT;
 	mci_status.dwItem = MCI_STATUS_POSITION;
 	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
 		MCI_PLAY_PARMS mci_play;

 		flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
 		mci_play.dwCallback = 0;
 		mci_play.dwFrom = mci_status.dwReturn;
 		mci_play.dwTo = SDL_CD_end_position;
 		if (SDL_SYS_CDioctl(cdrom->id,MCI_PLAY,flags,&mci_play) == 0) {
 			okay = 1;
 			SDL_paused[cdrom->id] = 0;
 		}
 	}
 	return(okay ? 0 : -1);
 #else
 	return(SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL));
 #endif /* BROKEN_MCI_PAUSE */
 }

 /* Stop play */
 static int SDL_SYS_CDStop(SDL_CD *cdrom)
 {
 	return(SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL));
 }

 /* Eject the CD-ROM */
 static int SDL_SYS_CDEject(SDL_CD *cdrom)
 {
 	return(SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL));
 }

 /* Close the CD-ROM handle */
 static void SDL_SYS_CDClose(SDL_CD *cdrom)
 {
 	SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL);
 }

 void SDL_SYS_CDQuit(void)
 {
 	int i;

 	if ( SDL_numcds > 0 ) {
 		for ( i=0; i<SDL_numcds; ++i ) {
 			SDL_free(SDL_cdlist[i]);
 			SDL_cdlist[i] = NULL;
 		}
 		SDL_numcds = 0;
 	}
 }

 #endif /* SDL_CDROM_WIN32 */
	/*
	SDL - Simple DirectMedia Layer
	Copyright (C) 1997-2009 Sam Lantinga

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 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
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this library; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

	Sam Lantinga
	slouken@libsdl.org
	*/
	#include "SDL_config.h"

	#ifdef SDL_CDROM_WIN32

	/* Functions for system-level CD-ROM audio control */

	#define WIN32_LEAN_AND_MEAN
	#include <windows.h>
	#include <mmsystem.h>

	#include "SDL_cdrom.h"
	#include "../SDL_syscdrom.h"

	/* This really broken?? */
	#define BROKEN_MCI_PAUSE /* Pausing actually stops play -- Doh! */

	/* The maximum number of CD-ROM drives we'll detect (Don't change!) */
	#define MAX_DRIVES 26

	/* A list of available CD-ROM drives */
	static char *SDL_cdlist[MAX_DRIVES];
	static MCIDEVICEID SDL_mciID[MAX_DRIVES];
	#ifdef BROKEN_MCI_PAUSE
	static int SDL_paused[MAX_DRIVES];
	#endif
	static int SDL_CD_end_position;

	/* The system-dependent CD control functions */
	static const char *SDL_SYS_CDName(int drive);
	static int SDL_SYS_CDOpen(int drive);
	static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
	static CDstatus SDL_SYS_CDStatus(SDL_CD cdrom, int position);
	static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
	static int SDL_SYS_CDPause(SDL_CD *cdrom);
	static int SDL_SYS_CDResume(SDL_CD *cdrom);
	static int SDL_SYS_CDStop(SDL_CD *cdrom);
	static int SDL_SYS_CDEject(SDL_CD *cdrom);
	static void SDL_SYS_CDClose(SDL_CD *cdrom);


	/* Add a CD-ROM drive to our list of valid drives */
	static void AddDrive(char *drive)
	{
	int i;

	if ( SDL_numcds < MAX_DRIVES ) {
	/* Add this drive to our list */
	i = SDL_numcds;
	SDL_cdlist[i] = SDL_strdup(drive);
	if ( SDL_cdlist[i] == NULL ) {
	SDL_OutOfMemory();
	return;
	}
	++SDL_numcds;
	#ifdef CDROM_DEBUG
	fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
	#endif
	}
	}

	int SDL_SYS_CDInit(void)
	{
	/* checklist: Drive 'A' - 'Z' */
	int i;
	char drive[4];

	/* Fill in our driver capabilities */
	SDL_CDcaps.Name = SDL_SYS_CDName;
	SDL_CDcaps.Open = SDL_SYS_CDOpen;
	SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
	SDL_CDcaps.Status = SDL_SYS_CDStatus;
	SDL_CDcaps.Play = SDL_SYS_CDPlay;
	SDL_CDcaps.Pause = SDL_SYS_CDPause;
	SDL_CDcaps.Resume = SDL_SYS_CDResume;
	SDL_CDcaps.Stop = SDL_SYS_CDStop;
	SDL_CDcaps.Eject = SDL_SYS_CDEject;
	SDL_CDcaps.Close = SDL_SYS_CDClose;

	/* Scan the system for CD-ROM drives */
	for ( i='A'; i<='Z'; ++i ) {
	SDL_snprintf(drive, SDL_arraysize(drive), "%c:\\", i);
	if ( GetDriveType(drive) == DRIVE_CDROM ) {
	AddDrive(drive);
	}
	}
	SDL_memset(SDL_mciID, 0, sizeof(SDL_mciID));
	return(0);
	}

	/* General ioctl() CD-ROM command function */
	static int SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg)
	{
	MCIERROR mci_error;

	mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD_PTR)arg);
	if ( mci_error ) {
	char error[256];

	mciGetErrorString(mci_error, error, 256);
	SDL_SetError("mciSendCommand() error: %s", error);
	}
	return(!mci_error ? 0 : -1);
	}

	static const char *SDL_SYS_CDName(int drive)
	{
	return(SDL_cdlist[drive]);
	}

	static int SDL_SYS_CDOpen(int drive)
	{
	MCI_OPEN_PARMS mci_open;
	MCI_SET_PARMS mci_set;
	char device[3];
	DWORD flags;

	/* Open the requested device */
	mci_open.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO;
	device[0] = *SDL_cdlist[drive];
	device[1] = ':';
	device[2] = '\0';
	mci_open.lpstrElementName = device;
	flags =
	(MCI_OPEN_TYPE\|MCI_OPEN_SHAREABLE\|MCI_OPEN_TYPE_ID\|MCI_OPEN_ELEMENT);
	if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
	flags &= ~MCI_OPEN_SHAREABLE;
	if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
	return(-1);
	}
	}
	SDL_mciID[drive] = mci_open.wDeviceID;

	/* Set the minute-second-frame time format */
	mci_set.dwTimeFormat = MCI_FORMAT_MSF;
	SDL_SYS_CDioctl(drive, MCI_SET, MCI_SET_TIME_FORMAT, &mci_set);

	#ifdef BROKEN_MCI_PAUSE
	SDL_paused[drive] = 0;
	#endif
	return(drive);
	}

	static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
	{
	MCI_STATUS_PARMS mci_status;
	int i, okay;
	DWORD flags;

	okay = 0;
	mci_status.dwItem = MCI_STATUS_NUMBER_OF_TRACKS;
	flags = MCI_STATUS_ITEM \| MCI_WAIT;
	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
	cdrom->numtracks = mci_status.dwReturn;
	if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
	cdrom->numtracks = SDL_MAX_TRACKS;
	}
	/* Read all the track TOC entries */
	flags = MCI_STATUS_ITEM \| MCI_TRACK \| MCI_WAIT;
	for ( i=0; i<cdrom->numtracks; ++i ) {
	cdrom->track[i].id = i+1;
	mci_status.dwTrack = cdrom->track[i].id;
	#ifdef MCI_CDA_STATUS_TYPE_TRACK
	mci_status.dwItem = MCI_CDA_STATUS_TYPE_TRACK;
	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
	&mci_status) < 0 ) {
	break;
	}
	if ( mci_status.dwReturn == MCI_CDA_TRACK_AUDIO ) {
	cdrom->track[i].type = SDL_AUDIO_TRACK;
	} else {
	cdrom->track[i].type = SDL_DATA_TRACK;
	}
	#else
	cdrom->track[i].type = SDL_AUDIO_TRACK;
	#endif
	mci_status.dwItem = MCI_STATUS_POSITION;
	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
	&mci_status) < 0 ) {
	break;
	}
	cdrom->track[i].offset = MSF_TO_FRAMES(
	MCI_MSF_MINUTE(mci_status.dwReturn),
	MCI_MSF_SECOND(mci_status.dwReturn),
	MCI_MSF_FRAME(mci_status.dwReturn));
	cdrom->track[i].length = 0;
	if ( i > 0 ) {
	cdrom->track[i-1].length =
	cdrom->track[i].offset-
	cdrom->track[i-1].offset;
	}
	}
	if ( i == cdrom->numtracks ) {
	mci_status.dwTrack = cdrom->track[i - 1].id;
	mci_status.dwItem = MCI_STATUS_LENGTH;
	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
	&mci_status) == 0 ) {
	cdrom->track[i - 1].length = MSF_TO_FRAMES(
	MCI_MSF_MINUTE(mci_status.dwReturn),
	MCI_MSF_SECOND(mci_status.dwReturn),
	MCI_MSF_FRAME(mci_status.dwReturn));
	/* compute lead-out offset */
	cdrom->track[i].offset = cdrom->track[i - 1].offset +
	cdrom->track[i - 1].length;
	cdrom->track[i].length = 0;
	okay = 1;
	}
	}
	}
	return(okay ? 0 : -1);
	}

	/* Get CD-ROM status */
	static CDstatus SDL_SYS_CDStatus(SDL_CD cdrom, int position)
	{
	CDstatus status;
	MCI_STATUS_PARMS mci_status;
	DWORD flags;

	flags = MCI_STATUS_ITEM \| MCI_WAIT;
	mci_status.dwItem = MCI_STATUS_MODE;
	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) < 0 ) {
	status = CD_ERROR;
	} else {
	switch (mci_status.dwReturn) {
	case MCI_MODE_NOT_READY:
	case MCI_MODE_OPEN:
	status = CD_TRAYEMPTY;
	break;
	case MCI_MODE_STOP:
	#ifdef BROKEN_MCI_PAUSE
	if ( SDL_paused[cdrom->id] ) {
	status = CD_PAUSED;
	} else {
	status = CD_STOPPED;
	}
	#else
	status = CD_STOPPED;
	#endif /* BROKEN_MCI_PAUSE */
	break;
	case MCI_MODE_PLAY:
	#ifdef BROKEN_MCI_PAUSE
	if ( SDL_paused[cdrom->id] ) {
	status = CD_PAUSED;
	} else {
	status = CD_PLAYING;
	}
	#else
	status = CD_PLAYING;
	#endif /* BROKEN_MCI_PAUSE */
	break;
	case MCI_MODE_PAUSE:
	status = CD_PAUSED;
	break;
	default:
	status = CD_ERROR;
	break;
	}
	}
	if ( position ) {
	if ( status == CD_PLAYING \|\| (status == CD_PAUSED) ) {
	mci_status.dwItem = MCI_STATUS_POSITION;
	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
	&mci_status) == 0 ) {
	*position = MSF_TO_FRAMES(
	MCI_MSF_MINUTE(mci_status.dwReturn),
	MCI_MSF_SECOND(mci_status.dwReturn),
	MCI_MSF_FRAME(mci_status.dwReturn));
	} else {
	*position = 0;
	}
	} else {
	*position = 0;
	}
	}
	return(status);
	}

	/* Start play */
	static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
	{
	MCI_PLAY_PARMS mci_play;
	int m, s, f;
	DWORD flags;

	flags = MCI_FROM \| MCI_TO \| MCI_NOTIFY;
	mci_play.dwCallback = 0;
	FRAMES_TO_MSF(start, &m, &s, &f);
	mci_play.dwFrom = MCI_MAKE_MSF(m, s, f);
	FRAMES_TO_MSF(start+length, &m, &s, &f);
	mci_play.dwTo = MCI_MAKE_MSF(m, s, f);
	SDL_CD_end_position = mci_play.dwTo;
	return(SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play));
	}

	/* Pause play */
	static int SDL_SYS_CDPause(SDL_CD *cdrom)
	{
	#ifdef BROKEN_MCI_PAUSE
	SDL_paused[cdrom->id] = 1;
	#endif
	return(SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL));
	}

	/* Resume play */
	static int SDL_SYS_CDResume(SDL_CD *cdrom)
	{
	#ifdef BROKEN_MCI_PAUSE
	MCI_STATUS_PARMS mci_status;
	int okay;
	int flags;

	okay = 0;
	/* Play from the current play position to the end position set earlier */
	flags = MCI_STATUS_ITEM \| MCI_WAIT;
	mci_status.dwItem = MCI_STATUS_POSITION;
	if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
	MCI_PLAY_PARMS mci_play;

	flags = MCI_FROM \| MCI_TO \| MCI_NOTIFY;
	mci_play.dwCallback = 0;
	mci_play.dwFrom = mci_status.dwReturn;
	mci_play.dwTo = SDL_CD_end_position;
	if (SDL_SYS_CDioctl(cdrom->id,MCI_PLAY,flags,&mci_play) == 0) {
	okay = 1;
	SDL_paused[cdrom->id] = 0;
	}
	}
	return(okay ? 0 : -1);
	#else
	return(SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL));
	#endif /* BROKEN_MCI_PAUSE */
	}

	/* Stop play */
	static int SDL_SYS_CDStop(SDL_CD *cdrom)
	{
	return(SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL));
	}

	/* Eject the CD-ROM */
	static int SDL_SYS_CDEject(SDL_CD *cdrom)
	{
	return(SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL));
	}

	/* Close the CD-ROM handle */
	static void SDL_SYS_CDClose(SDL_CD *cdrom)
	{
	SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL);
	}

	void SDL_SYS_CDQuit(void)
	{
	int i;

	if ( SDL_numcds > 0 ) {
	for ( i=0; i<SDL_numcds; ++i ) {
	SDL_free(SDL_cdlist[i]);
	SDL_cdlist[i] = NULL;
	}
	SDL_numcds = 0;
	}
	}

	#endif /* SDL_CDROM_WIN32 */