This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_syscdrom.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#ifdef SDL_CDROM_WIN32
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/* Functions for system-level CD-ROM audio control */
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#define WIN32_LEAN_AND_MEAN
#include <windows.h>
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#include <mmsystem.h>
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#include "SDL_cdrom.h"
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#include "../SDL_syscdrom.h"
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/* This really broken?? */
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#define BROKEN_MCI_PAUSE /* Pausing actually stops play -- Doh! */
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/* The maximum number of CD-ROM drives we'll detect (Don't change!) */
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#define MAX_DRIVES 26
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/* 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
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static int SDL_CD_end_position;
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/* The system-dependent CD control functions */
static const char *SDL_SYS_CDName(int drive);
static int SDL_SYS_CDOpen(int drive);
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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);
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/* Add a CD-ROM drive to our list of valid drives */
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static void
AddDrive(char *drive)
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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;
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#ifdef CDROM_DEBUG
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fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
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#endif
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}
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int
SDL_SYS_CDInit(void)
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/* 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);
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}
/* General ioctl() CD-ROM command function */
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static int
SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg)
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{
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MCIERROR mci_error;
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mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD_PTR) arg);
if (mci_error) {
char error[256];
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mciGetErrorString(mci_error, error, 256);
SDL_SetError("mciSendCommand() error: %s", error);
}
return (!mci_error ? 0 : -1);
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}
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static const char *
SDL_SYS_CDName(int drive)
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{
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return (SDL_cdlist[drive]);
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}
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static int
SDL_SYS_CDOpen(int drive)
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{
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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);
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#ifdef BROKEN_MCI_PAUSE
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SDL_paused[drive] = 0;
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#endif
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return (drive);
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}
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static int
SDL_SYS_CDGetTOC(SDL_CD * cdrom)
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{
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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;
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#ifdef MCI_CDA_STATUS_TYPE_TRACK
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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;
}
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#else
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cdrom->track[i].type = SDL_AUDIO_TRACK;
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#endif
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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);
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}
/* Get CD-ROM status */
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static CDstatus
SDL_SYS_CDStatus(SDL_CD * cdrom, int *position)
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{
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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:
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#ifdef BROKEN_MCI_PAUSE
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if (SDL_paused[cdrom->id]) {
status = CD_PAUSED;
} else {
status = CD_STOPPED;
}
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#else
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status = CD_STOPPED;
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#endif /* BROKEN_MCI_PAUSE */
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break;
case MCI_MODE_PLAY:
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#ifdef BROKEN_MCI_PAUSE
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if (SDL_paused[cdrom->id]) {
status = CD_PAUSED;
} else {
status = CD_PLAYING;
}
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status = CD_PLAYING;
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#endif /* BROKEN_MCI_PAUSE */
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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);
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}
/* Start play */
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static int
SDL_SYS_CDPlay(SDL_CD * cdrom, int start, int length)
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{
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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));
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}
/* Pause play */
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static int
SDL_SYS_CDPause(SDL_CD * cdrom)
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{
#ifdef BROKEN_MCI_PAUSE
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SDL_paused[cdrom->id] = 1;
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#endif
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return (SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL));
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}
/* Resume play */
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static int
SDL_SYS_CDResume(SDL_CD * cdrom)
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{
#ifdef BROKEN_MCI_PAUSE
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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);
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#else
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return (SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL));
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#endif /* BROKEN_MCI_PAUSE */
}
/* Stop play */
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static int
SDL_SYS_CDStop(SDL_CD * cdrom)
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{
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return (SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL));
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}
/* Eject the CD-ROM */
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static int
SDL_SYS_CDEject(SDL_CD * cdrom)
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{
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return (SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL));
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}
/* Close the CD-ROM handle */
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static void
SDL_SYS_CDClose(SDL_CD * cdrom)
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{
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SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL);
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}
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void
SDL_SYS_CDQuit(void)
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{
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int i;
if (SDL_numcds > 0) {
for (i = 0; i < SDL_numcds; ++i) {
SDL_free(SDL_cdlist[i]);
}
SDL_numcds = 0;
}
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}
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#endif /* SDL_CDROM_WIN32 */
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