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comparison src/cdrom/win32/SDL_syscdrom.c @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children e31f8d815aaa
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-1:000000000000 0:74212992fb08
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* Functions for system-level CD-ROM audio control */
29
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <windows.h>
33 #include <mmsystem.h>
34
35 #include "SDL_error.h"
36 #include "SDL_cdrom.h"
37 #include "SDL_syscdrom.h"
38
39 /* This really broken?? */
40 #define BROKEN_MCI_PAUSE /* Pausing actually stops play -- Doh! */
41
42 /* The maximum number of CD-ROM drives we'll detect (Don't change!) */
43 #define MAX_DRIVES 26
44
45 /* A list of available CD-ROM drives */
46 static char *SDL_cdlist[MAX_DRIVES];
47 static MCIDEVICEID SDL_mciID[MAX_DRIVES];
48 #ifdef BROKEN_MCI_PAUSE
49 static int SDL_paused[MAX_DRIVES];
50 #endif
51
52 /* The system-dependent CD control functions */
53 static const char *SDL_SYS_CDName(int drive);
54 static int SDL_SYS_CDOpen(int drive);
55 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
56 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
57 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
58 static int SDL_SYS_CDPause(SDL_CD *cdrom);
59 static int SDL_SYS_CDResume(SDL_CD *cdrom);
60 static int SDL_SYS_CDStop(SDL_CD *cdrom);
61 static int SDL_SYS_CDEject(SDL_CD *cdrom);
62 static void SDL_SYS_CDClose(SDL_CD *cdrom);
63
64
65 /* Add a CD-ROM drive to our list of valid drives */
66 static void AddDrive(char *drive)
67 {
68 int i;
69
70 if ( SDL_numcds < MAX_DRIVES ) {
71 /* Add this drive to our list */
72 i = SDL_numcds;
73 SDL_cdlist[i] = (char *)malloc(strlen(drive)+1);
74 if ( SDL_cdlist[i] == NULL ) {
75 SDL_OutOfMemory();
76 return;
77 }
78 strcpy(SDL_cdlist[i], drive);
79 ++SDL_numcds;
80 #ifdef CDROM_DEBUG
81 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
82 #endif
83 }
84 }
85
86 int SDL_SYS_CDInit(void)
87 {
88 /* checklist: Drive 'A' - 'Z' */
89 int i;
90 char drive[4];
91
92 /* Fill in our driver capabilities */
93 SDL_CDcaps.Name = SDL_SYS_CDName;
94 SDL_CDcaps.Open = SDL_SYS_CDOpen;
95 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
96 SDL_CDcaps.Status = SDL_SYS_CDStatus;
97 SDL_CDcaps.Play = SDL_SYS_CDPlay;
98 SDL_CDcaps.Pause = SDL_SYS_CDPause;
99 SDL_CDcaps.Resume = SDL_SYS_CDResume;
100 SDL_CDcaps.Stop = SDL_SYS_CDStop;
101 SDL_CDcaps.Eject = SDL_SYS_CDEject;
102 SDL_CDcaps.Close = SDL_SYS_CDClose;
103
104 /* Scan the system for CD-ROM drives */
105 for ( i='A'; i<='Z'; ++i ) {
106 sprintf(drive, "%c:\\", i);
107 if ( GetDriveType(drive) == DRIVE_CDROM ) {
108 AddDrive(drive);
109 }
110 }
111 memset(SDL_mciID, 0, sizeof(SDL_mciID));
112 return(0);
113 }
114
115 /* General ioctl() CD-ROM command function */
116 static int SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg)
117 {
118 MCIERROR mci_error;
119
120 mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD)arg);
121 if ( mci_error ) {
122 char error[256];
123
124 mciGetErrorString(mci_error, error, 256);
125 SDL_SetError("mciSendCommand() error: %s", error);
126 }
127 return(!mci_error ? 0 : -1);
128 }
129
130 static const char *SDL_SYS_CDName(int drive)
131 {
132 return(SDL_cdlist[drive]);
133 }
134
135 static int SDL_SYS_CDOpen(int drive)
136 {
137 MCI_OPEN_PARMS mci_open;
138 MCI_SET_PARMS mci_set;
139 char device[3];
140 DWORD flags;
141
142 /* Open the requested device */
143 mci_open.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO;
144 device[0] = *SDL_cdlist[drive];
145 device[1] = ':';
146 device[2] = '\0';
147 mci_open.lpstrElementName = device;
148 flags =
149 (MCI_OPEN_TYPE|MCI_OPEN_SHAREABLE|MCI_OPEN_TYPE_ID|MCI_OPEN_ELEMENT);
150 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
151 flags &= ~MCI_OPEN_SHAREABLE;
152 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
153 return(-1);
154 }
155 }
156 SDL_mciID[drive] = mci_open.wDeviceID;
157
158 /* Set the minute-second-frame time format */
159 mci_set.dwTimeFormat = MCI_FORMAT_MSF;
160 SDL_SYS_CDioctl(drive, MCI_SET, MCI_SET_TIME_FORMAT, &mci_set);
161
162 #ifdef BROKEN_MCI_PAUSE
163 SDL_paused[drive] = 0;
164 #endif
165 return(drive);
166 }
167
168 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
169 {
170 MCI_STATUS_PARMS mci_status;
171 int i, okay;
172 DWORD flags;
173
174 okay = 0;
175 mci_status.dwItem = MCI_STATUS_NUMBER_OF_TRACKS;
176 flags = MCI_STATUS_ITEM | MCI_WAIT;
177 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
178 cdrom->numtracks = mci_status.dwReturn;
179 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
180 cdrom->numtracks = SDL_MAX_TRACKS;
181 }
182 /* Read all the track TOC entries */
183 flags = MCI_STATUS_ITEM | MCI_TRACK | MCI_WAIT;
184 for ( i=0; i<cdrom->numtracks; ++i ) {
185 cdrom->track[i].id = i+1;
186 mci_status.dwTrack = cdrom->track[i].id;
187 #ifdef MCI_CDA_STATUS_TYPE_TRACK
188 mci_status.dwItem = MCI_CDA_STATUS_TYPE_TRACK;
189 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
190 &mci_status) < 0 ) {
191 break;
192 }
193 if ( mci_status.dwReturn == MCI_CDA_TRACK_AUDIO ) {
194 cdrom->track[i].type = SDL_AUDIO_TRACK;
195 } else {
196 cdrom->track[i].type = SDL_DATA_TRACK;
197 }
198 #else
199 cdrom->track[i].type = SDL_AUDIO_TRACK;
200 #endif
201 mci_status.dwItem = MCI_STATUS_POSITION;
202 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
203 &mci_status) < 0 ) {
204 break;
205 }
206 cdrom->track[i].offset = MSF_TO_FRAMES(
207 MCI_MSF_MINUTE(mci_status.dwReturn),
208 MCI_MSF_SECOND(mci_status.dwReturn),
209 MCI_MSF_FRAME(mci_status.dwReturn));
210 cdrom->track[i].length = 0;
211 if ( i > 0 ) {
212 cdrom->track[i-1].length =
213 cdrom->track[i].offset-
214 cdrom->track[i-1].offset;
215 }
216 }
217 if ( i == cdrom->numtracks ) {
218 flags &= ~MCI_TRACK;
219 mci_status.dwItem = MCI_STATUS_LENGTH;
220 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
221 &mci_status) == 0 ) {
222 cdrom->track[i].offset = MSF_TO_FRAMES(
223 MCI_MSF_MINUTE(mci_status.dwReturn),
224 MCI_MSF_SECOND(mci_status.dwReturn),
225 MCI_MSF_FRAME(mci_status.dwReturn));
226 cdrom->track[i].length = 0;
227 cdrom->track[i-1].length =
228 cdrom->track[i].offset-
229 cdrom->track[i-1].offset;
230 okay = 1;
231 }
232 }
233 }
234 return(okay ? 0 : -1);
235 }
236
237 /* Get CD-ROM status */
238 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
239 {
240 CDstatus status;
241 MCI_STATUS_PARMS mci_status;
242 DWORD flags;
243
244 flags = MCI_STATUS_ITEM | MCI_WAIT;
245 mci_status.dwItem = MCI_STATUS_MODE;
246 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) < 0 ) {
247 status = CD_ERROR;
248 } else {
249 switch (mci_status.dwReturn) {
250 case MCI_MODE_NOT_READY:
251 case MCI_MODE_OPEN:
252 status = CD_TRAYEMPTY;
253 break;
254 case MCI_MODE_STOP:
255 #ifdef BROKEN_MCI_PAUSE
256 if ( SDL_paused[cdrom->id] ) {
257 status = CD_PAUSED;
258 } else {
259 status = CD_STOPPED;
260 }
261 #else
262 status = CD_STOPPED;
263 #endif /* BROKEN_MCI_PAUSE */
264 break;
265 case MCI_MODE_PLAY:
266 status = CD_PLAYING;
267 break;
268 case MCI_MODE_PAUSE:
269 status = CD_PAUSED;
270 break;
271 default:
272 status = CD_ERROR;
273 break;
274 }
275 }
276 if ( position ) {
277 if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
278 mci_status.dwItem = MCI_STATUS_POSITION;
279 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
280 &mci_status) == 0 ) {
281 *position = MSF_TO_FRAMES(
282 MCI_MSF_MINUTE(mci_status.dwReturn),
283 MCI_MSF_SECOND(mci_status.dwReturn),
284 MCI_MSF_FRAME(mci_status.dwReturn));
285 } else {
286 *position = 0;
287 }
288 } else {
289 *position = 0;
290 }
291 }
292 return(status);
293 }
294
295 /* Start play */
296 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
297 {
298 MCI_PLAY_PARMS mci_play;
299 int m, s, f;
300 DWORD flags;
301
302 flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
303 mci_play.dwCallback = 0;
304 FRAMES_TO_MSF(start, &m, &s, &f);
305 mci_play.dwFrom = MCI_MAKE_MSF(m, s, f);
306 FRAMES_TO_MSF(start+length, &m, &s, &f);
307 mci_play.dwTo = MCI_MAKE_MSF(m, s, f);
308 return(SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play));
309 }
310
311 /* Pause play */
312 static int SDL_SYS_CDPause(SDL_CD *cdrom)
313 {
314 #ifdef BROKEN_MCI_PAUSE
315 SDL_paused[cdrom->id] = 1;
316 #endif
317 return(SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL));
318 }
319
320 /* Resume play */
321 static int SDL_SYS_CDResume(SDL_CD *cdrom)
322 {
323 #ifdef BROKEN_MCI_PAUSE
324 MCI_STATUS_PARMS mci_status;
325 int okay;
326 int flags;
327
328 okay = 0;
329 /* Play from the current play position to end of CD */
330 flags = MCI_STATUS_ITEM | MCI_WAIT;
331 mci_status.dwItem = MCI_STATUS_POSITION;
332 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
333 MCI_PLAY_PARMS mci_play;
334
335 flags = MCI_FROM | MCI_NOTIFY;
336 mci_play.dwCallback = 0;
337 mci_play.dwFrom = mci_status.dwReturn;
338 if (SDL_SYS_CDioctl(cdrom->id,MCI_PLAY,flags,&mci_play) == 0) {
339 okay = 1;
340 SDL_paused[cdrom->id] = 0;
341 }
342 }
343 return(okay ? 0 : -1);
344 #else
345 return(SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL));
346 #endif /* BROKEN_MCI_PAUSE */
347 }
348
349 /* Stop play */
350 static int SDL_SYS_CDStop(SDL_CD *cdrom)
351 {
352 return(SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL));
353 }
354
355 /* Eject the CD-ROM */
356 static int SDL_SYS_CDEject(SDL_CD *cdrom)
357 {
358 return(SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL));
359 }
360
361 /* Close the CD-ROM handle */
362 static void SDL_SYS_CDClose(SDL_CD *cdrom)
363 {
364 SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL);
365 }
366
367 void SDL_SYS_CDQuit(void)
368 {
369 int i;
370
371 if ( SDL_numcds > 0 ) {
372 for ( i=0; i<SDL_numcds; ++i ) {
373 free(SDL_cdlist[i]);
374 }
375 SDL_numcds = 0;
376 }
377 }