/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2006 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

*/

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

#include "SDL_windows.h"

#include <mmsystem.h>

#include "SDL_error.h"

#include "SDL_cdrom.h"

#include "SDL_stdlib.h"

#include "SDL_string.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] = (char *)SDL_malloc(SDL_strlen(drive)+1);

if ( SDL_cdlist[i] == NULL ) {

SDL_OutOfMemory();

return;

}

SDL_strcpy(SDL_cdlist[i], drive);

++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)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)) + 1; /* +1 to fix */

/* MCI last track length bug */

/* 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_numcds = 0;

}

}