Commit | Line | Data |
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7840ced1 | 1 | /* sound.c -- sound support. |
53fab6e2 | 2 | Copyright (C) 1998, 1999, 2001 Free Software Foundation. |
7840ced1 GM |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* Written by Gerd Moellmann <gerd@gnu.org>. Tested with Luigi's | |
22 | driver on FreeBSD 2.2.7 with a SoundBlaster 16. */ | |
23 | ||
24 | #include <config.h> | |
25 | ||
26 | #if defined HAVE_SOUND | |
27 | ||
7840ced1 GM |
28 | #include <fcntl.h> |
29 | #include <unistd.h> | |
30 | #include <sys/types.h> | |
7840ced1 | 31 | #include <errno.h> |
53fab6e2 GM |
32 | #include "lisp.h" |
33 | #include "dispextern.h" | |
34 | #include "atimer.h" | |
bb6e8cee GM |
35 | #include <signal.h> |
36 | #include "syssignal.h" | |
7840ced1 | 37 | |
502150e5 PJ |
38 | #ifndef MSDOS |
39 | #include <sys/ioctl.h> | |
40 | #endif | |
41 | ||
7840ced1 GM |
42 | /* FreeBSD has machine/soundcard.h. Voxware sound driver docs mention |
43 | sys/soundcard.h. So, let's try whatever's there. */ | |
44 | ||
45 | #ifdef HAVE_MACHINE_SOUNDCARD_H | |
46 | #include <machine/soundcard.h> | |
47 | #endif | |
48 | #ifdef HAVE_SYS_SOUNDCARD_H | |
49 | #include <sys/soundcard.h> | |
50 | #endif | |
80fcd514 | 51 | #ifdef HAVE_SOUNDCARD_H |
80fcd514 KR |
52 | #include <soundcard.h> |
53 | #endif | |
54 | ||
55 | #ifndef DEFAULT_SOUND_DEVICE | |
56 | #define DEFAULT_SOUND_DEVICE "/dev/dsp" | |
57 | #endif | |
7840ced1 | 58 | |
7840ced1 GM |
59 | #define abs(X) ((X) < 0 ? -(X) : (X)) |
60 | ||
61 | /* Structure forward declarations. */ | |
62 | ||
d1299cde | 63 | struct sound; |
7840ced1 GM |
64 | struct sound_device; |
65 | ||
66 | /* The file header of RIFF-WAVE files (*.wav). Files are always in | |
67 | little-endian byte-order. */ | |
68 | ||
69 | struct wav_header | |
70 | { | |
71 | u_int32_t magic; | |
72 | u_int32_t length; | |
73 | u_int32_t chunk_type; | |
74 | u_int32_t chunk_format; | |
75 | u_int32_t chunk_length; | |
76 | u_int16_t format; | |
77 | u_int16_t channels; | |
78 | u_int32_t sample_rate; | |
79 | u_int32_t bytes_per_second; | |
80 | u_int16_t sample_size; | |
81 | u_int16_t precision; | |
82 | u_int32_t chunk_data; | |
83 | u_int32_t data_length; | |
84 | }; | |
85 | ||
86 | /* The file header of Sun adio files (*.au). Files are always in | |
87 | big-endian byte-order. */ | |
88 | ||
89 | struct au_header | |
90 | { | |
91 | /* ASCII ".snd" */ | |
92 | u_int32_t magic_number; | |
a4ff5d67 | 93 | |
7840ced1 GM |
94 | /* Offset of data part from start of file. Minimum value is 24. */ |
95 | u_int32_t data_offset; | |
a4ff5d67 | 96 | |
7840ced1 GM |
97 | /* Size of data part, 0xffffffff if unknown. */ |
98 | u_int32_t data_size; | |
99 | ||
100 | /* Data encoding format. | |
101 | 1 8-bit ISDN u-law | |
102 | 2 8-bit linear PCM (REF-PCM) | |
103 | 3 16-bit linear PCM | |
104 | 4 24-bit linear PCM | |
105 | 5 32-bit linear PCM | |
106 | 6 32-bit IEEE floating-point | |
107 | 7 64-bit IEEE floating-point | |
108 | 23 8-bit u-law compressed using CCITT 0.721 ADPCM voice data | |
109 | encoding scheme. */ | |
110 | u_int32_t encoding; | |
111 | ||
112 | /* Number of samples per second. */ | |
113 | u_int32_t sample_rate; | |
114 | ||
115 | /* Number of interleaved channels. */ | |
116 | u_int32_t channels; | |
117 | }; | |
118 | ||
119 | /* Maximum of all sound file headers sizes. */ | |
120 | ||
121 | #define MAX_SOUND_HEADER_BYTES \ | |
122 | max (sizeof (struct wav_header), sizeof (struct au_header)) | |
123 | ||
124 | /* Interface structure for sound devices. */ | |
125 | ||
126 | struct sound_device | |
127 | { | |
128 | /* The name of the device or null meaning use a default device name. */ | |
129 | char *file; | |
130 | ||
131 | /* File descriptor of the device. */ | |
132 | int fd; | |
133 | ||
134 | /* Device-dependent format. */ | |
135 | int format; | |
136 | ||
137 | /* Volume (0..100). Zero means unspecified. */ | |
138 | int volume; | |
139 | ||
140 | /* Sample size. */ | |
141 | int sample_size; | |
142 | ||
143 | /* Sample rate. */ | |
144 | int sample_rate; | |
145 | ||
146 | /* Bytes per second. */ | |
147 | int bps; | |
148 | ||
149 | /* 1 = mono, 2 = stereo, 0 = don't set. */ | |
150 | int channels; | |
a4ff5d67 | 151 | |
7840ced1 GM |
152 | /* Open device SD. */ |
153 | void (* open) P_ ((struct sound_device *sd)); | |
154 | ||
155 | /* Close device SD. */ | |
156 | void (* close) P_ ((struct sound_device *sd)); | |
157 | ||
158 | /* Configure SD accoring to device-dependent parameters. */ | |
159 | void (* configure) P_ ((struct sound_device *device)); | |
a4ff5d67 | 160 | |
d1299cde | 161 | /* Choose a device-dependent format for outputting sound S. */ |
7840ced1 | 162 | void (* choose_format) P_ ((struct sound_device *sd, |
d1299cde | 163 | struct sound *s)); |
7840ced1 GM |
164 | |
165 | /* Write NYBTES bytes from BUFFER to device SD. */ | |
dca0fc1c KR |
166 | void (* write) P_ ((struct sound_device *sd, const char *buffer, |
167 | int nbytes)); | |
7840ced1 GM |
168 | |
169 | /* A place for devices to store additional data. */ | |
170 | void *data; | |
171 | }; | |
172 | ||
173 | /* An enumerator for each supported sound file type. */ | |
174 | ||
175 | enum sound_type | |
176 | { | |
177 | RIFF, | |
178 | SUN_AUDIO | |
179 | }; | |
180 | ||
181 | /* Interface structure for sound files. */ | |
182 | ||
d1299cde | 183 | struct sound |
7840ced1 GM |
184 | { |
185 | /* The type of the file. */ | |
186 | enum sound_type type; | |
187 | ||
d1299cde | 188 | /* File descriptor of a sound file. */ |
7840ced1 GM |
189 | int fd; |
190 | ||
d1299cde GM |
191 | /* Pointer to sound file header. This contains header_size bytes |
192 | read from the start of a sound file. */ | |
7840ced1 GM |
193 | char *header; |
194 | ||
d1299cde GM |
195 | /* Number of bytes raed from sound file. This is always <= |
196 | MAX_SOUND_HEADER_BYTES. */ | |
197 | int header_size; | |
198 | ||
199 | /* Sound data, if a string. */ | |
200 | Lisp_Object data; | |
201 | ||
202 | /* Play sound file S on device SD. */ | |
a4ff5d67 | 203 | void (* play) P_ ((struct sound *s, struct sound_device *sd)); |
7840ced1 GM |
204 | }; |
205 | ||
206 | /* Indices of attributes in a sound attributes vector. */ | |
207 | ||
208 | enum sound_attr | |
209 | { | |
210 | SOUND_FILE, | |
d1299cde | 211 | SOUND_DATA, |
7840ced1 GM |
212 | SOUND_DEVICE, |
213 | SOUND_VOLUME, | |
214 | SOUND_ATTR_SENTINEL | |
215 | }; | |
216 | ||
217 | /* Symbols. */ | |
218 | ||
d1299cde | 219 | extern Lisp_Object QCfile, QCdata; |
7840ced1 GM |
220 | Lisp_Object QCvolume, QCdevice; |
221 | Lisp_Object Qsound; | |
2a53558d | 222 | Lisp_Object Qplay_sound_functions; |
7840ced1 | 223 | |
14e415e7 | 224 | /* These are set during `play-sound-internal' so that sound_cleanup has |
7840ced1 GM |
225 | access to them. */ |
226 | ||
d1299cde GM |
227 | struct sound_device *current_sound_device; |
228 | struct sound *current_sound; | |
7840ced1 GM |
229 | |
230 | /* Function prototypes. */ | |
231 | ||
232 | static void vox_open P_ ((struct sound_device *)); | |
233 | static void vox_configure P_ ((struct sound_device *)); | |
234 | static void vox_close P_ ((struct sound_device *sd)); | |
d1299cde | 235 | static void vox_choose_format P_ ((struct sound_device *, struct sound *)); |
7840ced1 | 236 | static void vox_init P_ ((struct sound_device *)); |
dca0fc1c | 237 | static void vox_write P_ ((struct sound_device *, const char *, int)); |
7840ced1 | 238 | static void sound_perror P_ ((char *)); |
62725a92 | 239 | static void sound_warning P_ ((char *)); |
7840ced1 | 240 | static int parse_sound P_ ((Lisp_Object, Lisp_Object *)); |
d1299cde | 241 | static void find_sound_type P_ ((struct sound *)); |
7840ced1 GM |
242 | static u_int32_t le2hl P_ ((u_int32_t)); |
243 | static u_int16_t le2hs P_ ((u_int16_t)); | |
244 | static u_int32_t be2hl P_ ((u_int32_t)); | |
d1299cde GM |
245 | static int wav_init P_ ((struct sound *)); |
246 | static void wav_play P_ ((struct sound *, struct sound_device *)); | |
247 | static int au_init P_ ((struct sound *)); | |
248 | static void au_play P_ ((struct sound *, struct sound_device *)); | |
7840ced1 | 249 | |
9680b9d0 GM |
250 | #if 0 /* Currently not used. */ |
251 | static u_int16_t be2hs P_ ((u_int16_t)); | |
252 | #endif | |
253 | ||
7840ced1 GM |
254 | |
255 | \f | |
256 | /*********************************************************************** | |
257 | General | |
258 | ***********************************************************************/ | |
259 | ||
260 | /* Like perror, but signals an error. */ | |
261 | ||
262 | static void | |
263 | sound_perror (msg) | |
264 | char *msg; | |
265 | { | |
3297e2a1 AS |
266 | int saved_errno = errno; |
267 | ||
62725a92 GM |
268 | turn_on_atimers (1); |
269 | #ifdef SIGIO | |
270 | sigunblock (sigmask (SIGIO)); | |
271 | #endif | |
3297e2a1 AS |
272 | if (saved_errno != 0) |
273 | error ("%s: %s", msg, strerror (saved_errno)); | |
62725a92 GM |
274 | else |
275 | error ("%s", msg); | |
276 | } | |
277 | ||
278 | ||
279 | /* Display a warning message. */ | |
280 | ||
281 | static void | |
282 | sound_warning (msg) | |
283 | char *msg; | |
284 | { | |
285 | message (msg); | |
7840ced1 GM |
286 | } |
287 | ||
288 | ||
289 | /* Parse sound specification SOUND, and fill ATTRS with what is | |
290 | found. Value is non-zero if SOUND Is a valid sound specification. | |
291 | A valid sound specification is a list starting with the symbol | |
292 | `sound'. The rest of the list is a property list which may | |
293 | contain the following key/value pairs: | |
294 | ||
295 | - `:file FILE' | |
296 | ||
297 | FILE is the sound file to play. If it isn't an absolute name, | |
298 | it's searched under `data-directory'. | |
299 | ||
d1299cde GM |
300 | - `:data DATA' |
301 | ||
302 | DATA is a string containing sound data. Either :file or :data | |
303 | may be present, but not both. | |
304 | ||
7840ced1 GM |
305 | - `:device DEVICE' |
306 | ||
307 | DEVICE is the name of the device to play on, e.g. "/dev/dsp2". | |
308 | If not specified, a default device is used. | |
309 | ||
310 | - `:volume VOL' | |
311 | ||
2a53558d GM |
312 | VOL must be an integer in the range [0, 100], or a float in the |
313 | range [0, 1]. */ | |
7840ced1 GM |
314 | |
315 | static int | |
316 | parse_sound (sound, attrs) | |
317 | Lisp_Object sound; | |
318 | Lisp_Object *attrs; | |
319 | { | |
320 | /* SOUND must be a list starting with the symbol `sound'. */ | |
321 | if (!CONSP (sound) || !EQ (XCAR (sound), Qsound)) | |
322 | return 0; | |
323 | ||
324 | sound = XCDR (sound); | |
325 | attrs[SOUND_FILE] = Fplist_get (sound, QCfile); | |
d1299cde | 326 | attrs[SOUND_DATA] = Fplist_get (sound, QCdata); |
7840ced1 GM |
327 | attrs[SOUND_DEVICE] = Fplist_get (sound, QCdevice); |
328 | attrs[SOUND_VOLUME] = Fplist_get (sound, QCvolume); | |
329 | ||
d1299cde GM |
330 | /* File name or data must be specified. */ |
331 | if (!STRINGP (attrs[SOUND_FILE]) | |
332 | && !STRINGP (attrs[SOUND_DATA])) | |
7840ced1 GM |
333 | return 0; |
334 | ||
335 | /* Volume must be in the range 0..100 or unspecified. */ | |
336 | if (!NILP (attrs[SOUND_VOLUME])) | |
337 | { | |
2a53558d GM |
338 | if (INTEGERP (attrs[SOUND_VOLUME])) |
339 | { | |
340 | if (XINT (attrs[SOUND_VOLUME]) < 0 | |
341 | || XINT (attrs[SOUND_VOLUME]) > 100) | |
342 | return 0; | |
343 | } | |
344 | else if (FLOATP (attrs[SOUND_VOLUME])) | |
345 | { | |
346 | if (XFLOAT_DATA (attrs[SOUND_VOLUME]) < 0 | |
347 | || XFLOAT_DATA (attrs[SOUND_VOLUME]) > 1) | |
348 | return 0; | |
349 | } | |
350 | else | |
7840ced1 GM |
351 | return 0; |
352 | } | |
353 | ||
354 | /* Device must be a string or unspecified. */ | |
355 | if (!NILP (attrs[SOUND_DEVICE]) | |
356 | && !STRINGP (attrs[SOUND_DEVICE])) | |
357 | return 0; | |
358 | ||
359 | return 1; | |
360 | } | |
361 | ||
362 | ||
363 | /* Find out the type of the sound file whose file descriptor is FD. | |
d1299cde | 364 | S is the sound file structure to fill in. */ |
7840ced1 GM |
365 | |
366 | static void | |
d1299cde GM |
367 | find_sound_type (s) |
368 | struct sound *s; | |
7840ced1 | 369 | { |
d1299cde GM |
370 | if (!wav_init (s) && !au_init (s)) |
371 | error ("Unknown sound format"); | |
7840ced1 GM |
372 | } |
373 | ||
374 | ||
14e415e7 | 375 | /* Function installed by play-sound-internal with record_unwind_protect. */ |
7840ced1 GM |
376 | |
377 | static Lisp_Object | |
378 | sound_cleanup (arg) | |
379 | Lisp_Object arg; | |
380 | { | |
d1299cde | 381 | if (current_sound_device) |
7840ced1 | 382 | { |
66e4690f KR |
383 | if (current_sound_device->close) |
384 | current_sound_device->close (current_sound_device); | |
d1299cde GM |
385 | if (current_sound->fd > 0) |
386 | emacs_close (current_sound->fd); | |
7840ced1 | 387 | } |
3887b449 GM |
388 | |
389 | return Qnil; | |
7840ced1 GM |
390 | } |
391 | ||
392 | ||
14e415e7 | 393 | DEFUN ("play-sound-internal", Fplay_sound_internal, Splay_sound_internal, 1, 1, 0, |
8c1a1077 | 394 | doc: /* Play sound SOUND. |
8c1a1077 | 395 | |
14e415e7 | 396 | Internal use only, use `play-sound' instead. */) |
8c1a1077 | 397 | (sound) |
7840ced1 GM |
398 | Lisp_Object sound; |
399 | { | |
400 | Lisp_Object attrs[SOUND_ATTR_SENTINEL]; | |
7840ced1 GM |
401 | Lisp_Object file; |
402 | struct gcpro gcpro1, gcpro2; | |
7840ced1 | 403 | struct sound_device sd; |
d1299cde | 404 | struct sound s; |
7840ced1 | 405 | Lisp_Object args[2]; |
aed13378 | 406 | int count = SPECPDL_INDEX (); |
7840ced1 GM |
407 | |
408 | file = Qnil; | |
409 | GCPRO2 (sound, file); | |
410 | bzero (&sd, sizeof sd); | |
d1299cde GM |
411 | bzero (&s, sizeof s); |
412 | current_sound_device = &sd; | |
413 | current_sound = &s; | |
7840ced1 | 414 | record_unwind_protect (sound_cleanup, Qnil); |
d1299cde | 415 | s.header = (char *) alloca (MAX_SOUND_HEADER_BYTES); |
7840ced1 GM |
416 | |
417 | /* Parse the sound specification. Give up if it is invalid. */ | |
418 | if (!parse_sound (sound, attrs)) | |
d1299cde GM |
419 | error ("Invalid sound specification"); |
420 | ||
421 | if (STRINGP (attrs[SOUND_FILE])) | |
7840ced1 | 422 | { |
d1299cde GM |
423 | /* Open the sound file. */ |
424 | s.fd = openp (Fcons (Vdata_directory, Qnil), | |
3d05168a | 425 | attrs[SOUND_FILE], Qnil, &file, Qnil); |
d1299cde | 426 | if (s.fd < 0) |
62725a92 | 427 | sound_perror ("Could not open sound file"); |
d1299cde GM |
428 | |
429 | /* Read the first bytes from the file. */ | |
430 | s.header_size = emacs_read (s.fd, s.header, MAX_SOUND_HEADER_BYTES); | |
431 | if (s.header_size < 0) | |
62725a92 | 432 | sound_perror ("Invalid sound file header"); |
d1299cde GM |
433 | } |
434 | else | |
435 | { | |
436 | s.data = attrs[SOUND_DATA]; | |
d5db4077 KR |
437 | s.header_size = min (MAX_SOUND_HEADER_BYTES, SBYTES (s.data)); |
438 | bcopy (SDATA (s.data), s.header, s.header_size); | |
7840ced1 GM |
439 | } |
440 | ||
d1299cde GM |
441 | /* Find out the type of sound. Give up if we can't tell. */ |
442 | find_sound_type (&s); | |
7840ced1 GM |
443 | |
444 | /* Set up a device. */ | |
445 | if (STRINGP (attrs[SOUND_DEVICE])) | |
446 | { | |
d5db4077 | 447 | int len = SCHARS (attrs[SOUND_DEVICE]); |
7840ced1 | 448 | sd.file = (char *) alloca (len + 1); |
d5db4077 | 449 | strcpy (sd.file, SDATA (attrs[SOUND_DEVICE])); |
7840ced1 | 450 | } |
a4ff5d67 | 451 | |
7840ced1 GM |
452 | if (INTEGERP (attrs[SOUND_VOLUME])) |
453 | sd.volume = XFASTINT (attrs[SOUND_VOLUME]); | |
2a53558d GM |
454 | else if (FLOATP (attrs[SOUND_VOLUME])) |
455 | sd.volume = XFLOAT_DATA (attrs[SOUND_VOLUME]) * 100; | |
7840ced1 | 456 | |
2a53558d | 457 | args[0] = Qplay_sound_functions; |
7840ced1 | 458 | args[1] = sound; |
52e386c2 | 459 | Frun_hook_with_args (2, args); |
7840ced1 | 460 | |
d1299cde GM |
461 | /* There is only one type of device we currently support, the VOX |
462 | sound driver. Set up the device interface functions for that | |
463 | device. */ | |
7840ced1 | 464 | vox_init (&sd); |
d1299cde GM |
465 | |
466 | /* Open the device. */ | |
7840ced1 GM |
467 | sd.open (&sd); |
468 | ||
d1299cde GM |
469 | /* Play the sound. */ |
470 | s.play (&s, &sd); | |
471 | ||
472 | /* Close the input file, if any. */ | |
473 | if (!STRINGP (s.data)) | |
474 | { | |
475 | emacs_close (s.fd); | |
476 | s.fd = -1; | |
477 | } | |
478 | ||
479 | /* Close the device. */ | |
7840ced1 | 480 | sd.close (&sd); |
d1299cde GM |
481 | |
482 | /* Clean up. */ | |
483 | current_sound_device = NULL; | |
484 | current_sound = NULL; | |
7840ced1 GM |
485 | UNGCPRO; |
486 | unbind_to (count, Qnil); | |
487 | return Qnil; | |
488 | } | |
489 | ||
490 | \f | |
491 | /*********************************************************************** | |
492 | Byte-order Conversion | |
493 | ***********************************************************************/ | |
494 | ||
495 | /* Convert 32-bit value VALUE which is in little-endian byte-order | |
496 | to host byte-order. */ | |
497 | ||
498 | static u_int32_t | |
499 | le2hl (value) | |
500 | u_int32_t value; | |
501 | { | |
502 | #ifdef WORDS_BIG_ENDIAN | |
503 | unsigned char *p = (unsigned char *) &value; | |
504 | value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24); | |
505 | #endif | |
506 | return value; | |
507 | } | |
508 | ||
509 | ||
510 | /* Convert 16-bit value VALUE which is in little-endian byte-order | |
511 | to host byte-order. */ | |
512 | ||
513 | static u_int16_t | |
514 | le2hs (value) | |
515 | u_int16_t value; | |
516 | { | |
517 | #ifdef WORDS_BIG_ENDIAN | |
518 | unsigned char *p = (unsigned char *) &value; | |
519 | value = p[0] + (p[1] << 8); | |
520 | #endif | |
521 | return value; | |
522 | } | |
523 | ||
524 | ||
525 | /* Convert 32-bit value VALUE which is in big-endian byte-order | |
526 | to host byte-order. */ | |
527 | ||
528 | static u_int32_t | |
529 | be2hl (value) | |
530 | u_int32_t value; | |
531 | { | |
532 | #ifndef WORDS_BIG_ENDIAN | |
533 | unsigned char *p = (unsigned char *) &value; | |
534 | value = p[3] + (p[2] << 8) + (p[1] << 16) + (p[0] << 24); | |
535 | #endif | |
536 | return value; | |
537 | } | |
538 | ||
539 | ||
9680b9d0 GM |
540 | #if 0 /* Currently not used. */ |
541 | ||
7840ced1 GM |
542 | /* Convert 16-bit value VALUE which is in big-endian byte-order |
543 | to host byte-order. */ | |
544 | ||
545 | static u_int16_t | |
546 | be2hs (value) | |
547 | u_int16_t value; | |
548 | { | |
549 | #ifndef WORDS_BIG_ENDIAN | |
550 | unsigned char *p = (unsigned char *) &value; | |
551 | value = p[1] + (p[0] << 8); | |
552 | #endif | |
553 | return value; | |
554 | } | |
555 | ||
9680b9d0 | 556 | #endif /* 0 */ |
7840ced1 GM |
557 | |
558 | \f | |
559 | /*********************************************************************** | |
560 | RIFF-WAVE (*.wav) | |
561 | ***********************************************************************/ | |
562 | ||
d1299cde | 563 | /* Try to initialize sound file S from S->header. S->header |
7840ced1 GM |
564 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
565 | sound file. If the file is a WAV-format file, set up interface | |
d1299cde | 566 | functions in S and convert header fields to host byte-order. |
7840ced1 GM |
567 | Value is non-zero if the file is a WAV file. */ |
568 | ||
569 | static int | |
d1299cde GM |
570 | wav_init (s) |
571 | struct sound *s; | |
7840ced1 | 572 | { |
d1299cde GM |
573 | struct wav_header *header = (struct wav_header *) s->header; |
574 | ||
575 | if (s->header_size < sizeof *header | |
576 | || bcmp (s->header, "RIFF", 4) != 0) | |
7840ced1 GM |
577 | return 0; |
578 | ||
579 | /* WAV files are in little-endian order. Convert the header | |
580 | if on a big-endian machine. */ | |
581 | header->magic = le2hl (header->magic); | |
582 | header->length = le2hl (header->length); | |
583 | header->chunk_type = le2hl (header->chunk_type); | |
584 | header->chunk_format = le2hl (header->chunk_format); | |
585 | header->chunk_length = le2hl (header->chunk_length); | |
586 | header->format = le2hs (header->format); | |
587 | header->channels = le2hs (header->channels); | |
588 | header->sample_rate = le2hl (header->sample_rate); | |
589 | header->bytes_per_second = le2hl (header->bytes_per_second); | |
590 | header->sample_size = le2hs (header->sample_size); | |
591 | header->precision = le2hs (header->precision); | |
592 | header->chunk_data = le2hl (header->chunk_data); | |
593 | header->data_length = le2hl (header->data_length); | |
594 | ||
595 | /* Set up the interface functions for WAV. */ | |
d1299cde GM |
596 | s->type = RIFF; |
597 | s->play = wav_play; | |
7840ced1 GM |
598 | |
599 | return 1; | |
a4ff5d67 | 600 | } |
7840ced1 GM |
601 | |
602 | ||
d1299cde | 603 | /* Play RIFF-WAVE audio file S on sound device SD. */ |
7840ced1 GM |
604 | |
605 | static void | |
d1299cde GM |
606 | wav_play (s, sd) |
607 | struct sound *s; | |
7840ced1 GM |
608 | struct sound_device *sd; |
609 | { | |
d1299cde | 610 | struct wav_header *header = (struct wav_header *) s->header; |
7840ced1 GM |
611 | |
612 | /* Let the device choose a suitable device-dependent format | |
613 | for the file. */ | |
d1299cde | 614 | sd->choose_format (sd, s); |
a4ff5d67 | 615 | |
7840ced1 GM |
616 | /* Configure the device. */ |
617 | sd->sample_size = header->sample_size; | |
618 | sd->sample_rate = header->sample_rate; | |
619 | sd->bps = header->bytes_per_second; | |
620 | sd->channels = header->channels; | |
621 | sd->configure (sd); | |
622 | ||
623 | /* Copy sound data to the device. The WAV file specification is | |
624 | actually more complex. This simple scheme worked with all WAV | |
625 | files I found so far. If someone feels inclined to implement the | |
626 | whole RIFF-WAVE spec, please do. */ | |
d1299cde | 627 | if (STRINGP (s->data)) |
d5db4077 KR |
628 | sd->write (sd, SDATA (s->data) + sizeof *header, |
629 | SBYTES (s->data) - sizeof *header); | |
d1299cde GM |
630 | else |
631 | { | |
632 | char *buffer; | |
633 | int nbytes; | |
634 | int blksize = 2048; | |
a4ff5d67 | 635 | |
d1299cde GM |
636 | buffer = (char *) alloca (blksize); |
637 | lseek (s->fd, sizeof *header, SEEK_SET); | |
a4ff5d67 | 638 | |
d1299cde GM |
639 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) |
640 | sd->write (sd, buffer, nbytes); | |
7840ced1 | 641 | |
d1299cde | 642 | if (nbytes < 0) |
62725a92 | 643 | sound_perror ("Error reading sound file"); |
d1299cde | 644 | } |
7840ced1 GM |
645 | } |
646 | ||
647 | ||
648 | \f | |
649 | /*********************************************************************** | |
650 | Sun Audio (*.au) | |
651 | ***********************************************************************/ | |
652 | ||
a4ff5d67 | 653 | /* Sun audio file encodings. */ |
7840ced1 GM |
654 | |
655 | enum au_encoding | |
656 | { | |
657 | AU_ENCODING_ULAW_8 = 1, | |
658 | AU_ENCODING_8, | |
659 | AU_ENCODING_16, | |
660 | AU_ENCODING_24, | |
661 | AU_ENCODING_32, | |
662 | AU_ENCODING_IEEE32, | |
663 | AU_ENCODING_IEEE64, | |
664 | AU_COMPRESSED = 23 | |
665 | }; | |
666 | ||
667 | ||
d1299cde | 668 | /* Try to initialize sound file S from S->header. S->header |
7840ced1 GM |
669 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
670 | sound file. If the file is a AU-format file, set up interface | |
d1299cde | 671 | functions in S and convert header fields to host byte-order. |
7840ced1 GM |
672 | Value is non-zero if the file is an AU file. */ |
673 | ||
674 | static int | |
d1299cde GM |
675 | au_init (s) |
676 | struct sound *s; | |
7840ced1 | 677 | { |
d1299cde | 678 | struct au_header *header = (struct au_header *) s->header; |
a4ff5d67 | 679 | |
d1299cde GM |
680 | if (s->header_size < sizeof *header |
681 | || bcmp (s->header, ".snd", 4) != 0) | |
7840ced1 | 682 | return 0; |
a4ff5d67 | 683 | |
7840ced1 GM |
684 | header->magic_number = be2hl (header->magic_number); |
685 | header->data_offset = be2hl (header->data_offset); | |
686 | header->data_size = be2hl (header->data_size); | |
687 | header->encoding = be2hl (header->encoding); | |
688 | header->sample_rate = be2hl (header->sample_rate); | |
689 | header->channels = be2hl (header->channels); | |
a4ff5d67 | 690 | |
7840ced1 | 691 | /* Set up the interface functions for AU. */ |
d1299cde GM |
692 | s->type = SUN_AUDIO; |
693 | s->play = au_play; | |
7840ced1 GM |
694 | |
695 | return 1; | |
696 | } | |
697 | ||
698 | ||
d1299cde | 699 | /* Play Sun audio file S on sound device SD. */ |
7840ced1 GM |
700 | |
701 | static void | |
d1299cde GM |
702 | au_play (s, sd) |
703 | struct sound *s; | |
7840ced1 GM |
704 | struct sound_device *sd; |
705 | { | |
d1299cde | 706 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 GM |
707 | |
708 | sd->sample_size = 0; | |
709 | sd->sample_rate = header->sample_rate; | |
710 | sd->bps = 0; | |
711 | sd->channels = header->channels; | |
d1299cde | 712 | sd->choose_format (sd, s); |
7840ced1 | 713 | sd->configure (sd); |
d1299cde GM |
714 | |
715 | if (STRINGP (s->data)) | |
d5db4077 KR |
716 | sd->write (sd, SDATA (s->data) + header->data_offset, |
717 | SBYTES (s->data) - header->data_offset); | |
d1299cde GM |
718 | else |
719 | { | |
720 | int blksize = 2048; | |
721 | char *buffer; | |
722 | int nbytes; | |
a4ff5d67 | 723 | |
d1299cde GM |
724 | /* Seek */ |
725 | lseek (s->fd, header->data_offset, SEEK_SET); | |
a4ff5d67 | 726 | |
d1299cde GM |
727 | /* Copy sound data to the device. */ |
728 | buffer = (char *) alloca (blksize); | |
729 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) | |
730 | sd->write (sd, buffer, nbytes); | |
a4ff5d67 | 731 | |
d1299cde | 732 | if (nbytes < 0) |
62725a92 | 733 | sound_perror ("Error reading sound file"); |
d1299cde | 734 | } |
7840ced1 GM |
735 | } |
736 | ||
737 | ||
738 | \f | |
739 | /*********************************************************************** | |
740 | Voxware Driver Interface | |
741 | ***********************************************************************/ | |
742 | ||
743 | /* This driver is available on GNU/Linux, and the free BSDs. FreeBSD | |
744 | has a compatible own driver aka Luigi's driver. */ | |
745 | ||
746 | ||
747 | /* Open device SD. If SD->file is non-null, open that device, | |
748 | otherwise use a default device name. */ | |
749 | ||
750 | static void | |
751 | vox_open (sd) | |
752 | struct sound_device *sd; | |
753 | { | |
754 | char *file; | |
a4ff5d67 | 755 | |
7840ced1 GM |
756 | /* Open the sound device. Default is /dev/dsp. */ |
757 | if (sd->file) | |
758 | file = sd->file; | |
759 | else | |
80fcd514 | 760 | file = DEFAULT_SOUND_DEVICE; |
a4ff5d67 | 761 | |
68c45bf0 | 762 | sd->fd = emacs_open (file, O_WRONLY, 0); |
7840ced1 GM |
763 | if (sd->fd < 0) |
764 | sound_perror (file); | |
765 | } | |
766 | ||
767 | ||
768 | /* Configure device SD from parameters in it. */ | |
769 | ||
770 | static void | |
771 | vox_configure (sd) | |
772 | struct sound_device *sd; | |
773 | { | |
28fcb7dc | 774 | int val; |
a4ff5d67 | 775 | |
7840ced1 GM |
776 | xassert (sd->fd >= 0); |
777 | ||
bb6e8cee GM |
778 | /* On GNU/Linux, it seems that the device driver doesn't like to be |
779 | interrupted by a signal. Block the ones we know to cause | |
780 | troubles. */ | |
b5cb1ada | 781 | turn_on_atimers (0); |
bb6e8cee GM |
782 | #ifdef SIGIO |
783 | sigblock (sigmask (SIGIO)); | |
784 | #endif | |
b5cb1ada | 785 | |
28fcb7dc GM |
786 | val = sd->format; |
787 | if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0 | |
788 | || val != sd->format) | |
62725a92 | 789 | sound_perror ("Could not set sound format"); |
7840ced1 | 790 | |
28fcb7dc GM |
791 | val = sd->channels != 1; |
792 | if (ioctl (sd->fd, SNDCTL_DSP_STEREO, &val) < 0 | |
793 | || val != (sd->channels != 1)) | |
62725a92 | 794 | sound_perror ("Could not set stereo/mono"); |
7840ced1 | 795 | |
28fcb7dc GM |
796 | /* I think bps and sampling_rate are the same, but who knows. |
797 | Check this. and use SND_DSP_SPEED for both. */ | |
798 | if (sd->sample_rate > 0) | |
799 | { | |
800 | val = sd->sample_rate; | |
62725a92 GM |
801 | if (ioctl (sd->fd, SNDCTL_DSP_SPEED, &sd->sample_rate) < 0) |
802 | sound_perror ("Could not set sound speed"); | |
803 | else if (val != sd->sample_rate) | |
804 | sound_warning ("Could not set sample rate"); | |
28fcb7dc | 805 | } |
7840ced1 | 806 | |
3887b449 GM |
807 | if (sd->volume > 0) |
808 | { | |
809 | int volume = sd->volume & 0xff; | |
810 | volume |= volume << 8; | |
28fcb7dc GM |
811 | /* This may fail if there is no mixer. Ignore the failure. */ |
812 | ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &volume); | |
3887b449 | 813 | } |
a4ff5d67 | 814 | |
b5cb1ada | 815 | turn_on_atimers (1); |
bb6e8cee GM |
816 | #ifdef SIGIO |
817 | sigunblock (sigmask (SIGIO)); | |
818 | #endif | |
7840ced1 GM |
819 | } |
820 | ||
821 | ||
822 | /* Close device SD if it is open. */ | |
823 | ||
824 | static void | |
825 | vox_close (sd) | |
826 | struct sound_device *sd; | |
827 | { | |
828 | if (sd->fd >= 0) | |
829 | { | |
bb6e8cee GM |
830 | /* On GNU/Linux, it seems that the device driver doesn't like to |
831 | be interrupted by a signal. Block the ones we know to cause | |
832 | troubles. */ | |
833 | #ifdef SIGIO | |
834 | sigblock (sigmask (SIGIO)); | |
835 | #endif | |
b5cb1ada | 836 | turn_on_atimers (0); |
a4ff5d67 | 837 | |
bb6e8cee | 838 | /* Flush sound data, and reset the device. */ |
7840ced1 | 839 | ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL); |
a4ff5d67 | 840 | |
b5cb1ada | 841 | turn_on_atimers (1); |
bb6e8cee GM |
842 | #ifdef SIGIO |
843 | sigunblock (sigmask (SIGIO)); | |
844 | #endif | |
7840ced1 GM |
845 | |
846 | /* Close the device. */ | |
68c45bf0 | 847 | emacs_close (sd->fd); |
7840ced1 GM |
848 | sd->fd = -1; |
849 | } | |
850 | } | |
851 | ||
852 | ||
d1299cde | 853 | /* Choose device-dependent format for device SD from sound file S. */ |
7840ced1 GM |
854 | |
855 | static void | |
d1299cde | 856 | vox_choose_format (sd, s) |
7840ced1 | 857 | struct sound_device *sd; |
d1299cde | 858 | struct sound *s; |
7840ced1 | 859 | { |
d1299cde | 860 | if (s->type == RIFF) |
7840ced1 | 861 | { |
d1299cde | 862 | struct wav_header *h = (struct wav_header *) s->header; |
7840ced1 GM |
863 | if (h->precision == 8) |
864 | sd->format = AFMT_U8; | |
865 | else if (h->precision == 16) | |
866 | sd->format = AFMT_S16_LE; | |
867 | else | |
868 | error ("Unsupported WAV file format"); | |
869 | } | |
d1299cde | 870 | else if (s->type == SUN_AUDIO) |
7840ced1 | 871 | { |
d1299cde | 872 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 GM |
873 | switch (header->encoding) |
874 | { | |
875 | case AU_ENCODING_ULAW_8: | |
876 | case AU_ENCODING_IEEE32: | |
877 | case AU_ENCODING_IEEE64: | |
878 | sd->format = AFMT_MU_LAW; | |
879 | break; | |
a4ff5d67 | 880 | |
7840ced1 GM |
881 | case AU_ENCODING_8: |
882 | case AU_ENCODING_16: | |
883 | case AU_ENCODING_24: | |
884 | case AU_ENCODING_32: | |
885 | sd->format = AFMT_S16_LE; | |
886 | break; | |
887 | ||
888 | default: | |
889 | error ("Unsupported AU file format"); | |
890 | } | |
891 | } | |
892 | else | |
893 | abort (); | |
894 | } | |
895 | ||
896 | ||
897 | /* Initialize device SD. Set up the interface functions in the device | |
898 | structure. */ | |
899 | ||
900 | static void | |
901 | vox_init (sd) | |
902 | struct sound_device *sd; | |
903 | { | |
904 | sd->fd = -1; | |
905 | sd->open = vox_open; | |
906 | sd->close = vox_close; | |
907 | sd->configure = vox_configure; | |
908 | sd->choose_format = vox_choose_format; | |
909 | sd->write = vox_write; | |
910 | } | |
911 | ||
912 | ||
913 | /* Write NBYTES bytes from BUFFER to device SD. */ | |
914 | ||
915 | static void | |
916 | vox_write (sd, buffer, nbytes) | |
917 | struct sound_device *sd; | |
dca0fc1c | 918 | const char *buffer; |
7840ced1 GM |
919 | int nbytes; |
920 | { | |
68c45bf0 | 921 | int nwritten = emacs_write (sd->fd, buffer, nbytes); |
7840ced1 | 922 | if (nwritten < 0) |
62725a92 | 923 | sound_perror ("Error writing to sound device"); |
7840ced1 GM |
924 | } |
925 | ||
926 | ||
927 | \f | |
928 | /*********************************************************************** | |
929 | Initialization | |
930 | ***********************************************************************/ | |
931 | ||
932 | void | |
933 | syms_of_sound () | |
934 | { | |
935 | QCdevice = intern (":device"); | |
936 | staticpro (&QCdevice); | |
937 | QCvolume = intern (":volume"); | |
938 | staticpro (&QCvolume); | |
939 | Qsound = intern ("sound"); | |
940 | staticpro (&Qsound); | |
2a53558d GM |
941 | Qplay_sound_functions = intern ("play-sound-functions"); |
942 | staticpro (&Qplay_sound_functions); | |
7840ced1 | 943 | |
14e415e7 | 944 | defsubr (&Splay_sound_internal); |
7840ced1 GM |
945 | } |
946 | ||
947 | ||
948 | void | |
949 | init_sound () | |
950 | { | |
951 | } | |
952 | ||
953 | #endif /* HAVE_SOUND */ |