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; | |
93 | ||
94 | /* Offset of data part from start of file. Minimum value is 24. */ | |
95 | u_int32_t data_offset; | |
96 | ||
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; | |
151 | ||
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)); | |
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. */ | |
166 | void (* write) P_ ((struct sound_device *sd, char *buffer, int nbytes)); | |
167 | ||
168 | /* A place for devices to store additional data. */ | |
169 | void *data; | |
170 | }; | |
171 | ||
172 | /* An enumerator for each supported sound file type. */ | |
173 | ||
174 | enum sound_type | |
175 | { | |
176 | RIFF, | |
177 | SUN_AUDIO | |
178 | }; | |
179 | ||
180 | /* Interface structure for sound files. */ | |
181 | ||
d1299cde | 182 | struct sound |
7840ced1 GM |
183 | { |
184 | /* The type of the file. */ | |
185 | enum sound_type type; | |
186 | ||
d1299cde | 187 | /* File descriptor of a sound file. */ |
7840ced1 GM |
188 | int fd; |
189 | ||
d1299cde GM |
190 | /* Pointer to sound file header. This contains header_size bytes |
191 | read from the start of a sound file. */ | |
7840ced1 GM |
192 | char *header; |
193 | ||
d1299cde GM |
194 | /* Number of bytes raed from sound file. This is always <= |
195 | MAX_SOUND_HEADER_BYTES. */ | |
196 | int header_size; | |
197 | ||
198 | /* Sound data, if a string. */ | |
199 | Lisp_Object data; | |
200 | ||
201 | /* Play sound file S on device SD. */ | |
202 | void (* play) P_ ((struct sound *s, struct sound_device *sd)); | |
7840ced1 GM |
203 | }; |
204 | ||
205 | /* Indices of attributes in a sound attributes vector. */ | |
206 | ||
207 | enum sound_attr | |
208 | { | |
209 | SOUND_FILE, | |
d1299cde | 210 | SOUND_DATA, |
7840ced1 GM |
211 | SOUND_DEVICE, |
212 | SOUND_VOLUME, | |
213 | SOUND_ATTR_SENTINEL | |
214 | }; | |
215 | ||
216 | /* Symbols. */ | |
217 | ||
d1299cde | 218 | extern Lisp_Object QCfile, QCdata; |
7840ced1 GM |
219 | Lisp_Object QCvolume, QCdevice; |
220 | Lisp_Object Qsound; | |
2a53558d | 221 | Lisp_Object Qplay_sound_functions; |
7840ced1 GM |
222 | |
223 | /* These are set during `play-sound' so that sound_cleanup has | |
224 | access to them. */ | |
225 | ||
d1299cde GM |
226 | struct sound_device *current_sound_device; |
227 | struct sound *current_sound; | |
7840ced1 GM |
228 | |
229 | /* Function prototypes. */ | |
230 | ||
231 | static void vox_open P_ ((struct sound_device *)); | |
232 | static void vox_configure P_ ((struct sound_device *)); | |
233 | static void vox_close P_ ((struct sound_device *sd)); | |
d1299cde | 234 | static void vox_choose_format P_ ((struct sound_device *, struct sound *)); |
7840ced1 GM |
235 | static void vox_init P_ ((struct sound_device *)); |
236 | static void vox_write P_ ((struct sound_device *, char *, int)); | |
237 | static void sound_perror P_ ((char *)); | |
238 | static int parse_sound P_ ((Lisp_Object, Lisp_Object *)); | |
d1299cde | 239 | static void find_sound_type P_ ((struct sound *)); |
7840ced1 GM |
240 | static u_int32_t le2hl P_ ((u_int32_t)); |
241 | static u_int16_t le2hs P_ ((u_int16_t)); | |
242 | static u_int32_t be2hl P_ ((u_int32_t)); | |
d1299cde GM |
243 | static int wav_init P_ ((struct sound *)); |
244 | static void wav_play P_ ((struct sound *, struct sound_device *)); | |
245 | static int au_init P_ ((struct sound *)); | |
246 | static void au_play P_ ((struct sound *, struct sound_device *)); | |
7840ced1 | 247 | |
9680b9d0 GM |
248 | #if 0 /* Currently not used. */ |
249 | static u_int16_t be2hs P_ ((u_int16_t)); | |
250 | #endif | |
251 | ||
7840ced1 GM |
252 | |
253 | \f | |
254 | /*********************************************************************** | |
255 | General | |
256 | ***********************************************************************/ | |
257 | ||
258 | /* Like perror, but signals an error. */ | |
259 | ||
260 | static void | |
261 | sound_perror (msg) | |
262 | char *msg; | |
263 | { | |
264 | error ("%s: %s", msg, strerror (errno)); | |
265 | } | |
266 | ||
267 | ||
268 | /* Parse sound specification SOUND, and fill ATTRS with what is | |
269 | found. Value is non-zero if SOUND Is a valid sound specification. | |
270 | A valid sound specification is a list starting with the symbol | |
271 | `sound'. The rest of the list is a property list which may | |
272 | contain the following key/value pairs: | |
273 | ||
274 | - `:file FILE' | |
275 | ||
276 | FILE is the sound file to play. If it isn't an absolute name, | |
277 | it's searched under `data-directory'. | |
278 | ||
d1299cde GM |
279 | - `:data DATA' |
280 | ||
281 | DATA is a string containing sound data. Either :file or :data | |
282 | may be present, but not both. | |
283 | ||
7840ced1 GM |
284 | - `:device DEVICE' |
285 | ||
286 | DEVICE is the name of the device to play on, e.g. "/dev/dsp2". | |
287 | If not specified, a default device is used. | |
288 | ||
289 | - `:volume VOL' | |
290 | ||
2a53558d GM |
291 | VOL must be an integer in the range [0, 100], or a float in the |
292 | range [0, 1]. */ | |
7840ced1 GM |
293 | |
294 | static int | |
295 | parse_sound (sound, attrs) | |
296 | Lisp_Object sound; | |
297 | Lisp_Object *attrs; | |
298 | { | |
299 | /* SOUND must be a list starting with the symbol `sound'. */ | |
300 | if (!CONSP (sound) || !EQ (XCAR (sound), Qsound)) | |
301 | return 0; | |
302 | ||
303 | sound = XCDR (sound); | |
304 | attrs[SOUND_FILE] = Fplist_get (sound, QCfile); | |
d1299cde | 305 | attrs[SOUND_DATA] = Fplist_get (sound, QCdata); |
7840ced1 GM |
306 | attrs[SOUND_DEVICE] = Fplist_get (sound, QCdevice); |
307 | attrs[SOUND_VOLUME] = Fplist_get (sound, QCvolume); | |
308 | ||
d1299cde GM |
309 | /* File name or data must be specified. */ |
310 | if (!STRINGP (attrs[SOUND_FILE]) | |
311 | && !STRINGP (attrs[SOUND_DATA])) | |
7840ced1 GM |
312 | return 0; |
313 | ||
314 | /* Volume must be in the range 0..100 or unspecified. */ | |
315 | if (!NILP (attrs[SOUND_VOLUME])) | |
316 | { | |
2a53558d GM |
317 | if (INTEGERP (attrs[SOUND_VOLUME])) |
318 | { | |
319 | if (XINT (attrs[SOUND_VOLUME]) < 0 | |
320 | || XINT (attrs[SOUND_VOLUME]) > 100) | |
321 | return 0; | |
322 | } | |
323 | else if (FLOATP (attrs[SOUND_VOLUME])) | |
324 | { | |
325 | if (XFLOAT_DATA (attrs[SOUND_VOLUME]) < 0 | |
326 | || XFLOAT_DATA (attrs[SOUND_VOLUME]) > 1) | |
327 | return 0; | |
328 | } | |
329 | else | |
7840ced1 GM |
330 | return 0; |
331 | } | |
332 | ||
333 | /* Device must be a string or unspecified. */ | |
334 | if (!NILP (attrs[SOUND_DEVICE]) | |
335 | && !STRINGP (attrs[SOUND_DEVICE])) | |
336 | return 0; | |
337 | ||
338 | return 1; | |
339 | } | |
340 | ||
341 | ||
342 | /* Find out the type of the sound file whose file descriptor is FD. | |
d1299cde | 343 | S is the sound file structure to fill in. */ |
7840ced1 GM |
344 | |
345 | static void | |
d1299cde GM |
346 | find_sound_type (s) |
347 | struct sound *s; | |
7840ced1 | 348 | { |
d1299cde GM |
349 | if (!wav_init (s) && !au_init (s)) |
350 | error ("Unknown sound format"); | |
7840ced1 GM |
351 | } |
352 | ||
353 | ||
354 | /* Function installed by play-sound with record_unwind_protect. */ | |
355 | ||
356 | static Lisp_Object | |
357 | sound_cleanup (arg) | |
358 | Lisp_Object arg; | |
359 | { | |
d1299cde | 360 | if (current_sound_device) |
7840ced1 | 361 | { |
66e4690f KR |
362 | if (current_sound_device->close) |
363 | current_sound_device->close (current_sound_device); | |
d1299cde GM |
364 | if (current_sound->fd > 0) |
365 | emacs_close (current_sound->fd); | |
7840ced1 | 366 | } |
3887b449 GM |
367 | |
368 | return Qnil; | |
7840ced1 GM |
369 | } |
370 | ||
371 | ||
372 | DEFUN ("play-sound", Fplay_sound, Splay_sound, 1, 1, 0, | |
2542139e GM |
373 | "Play sound SOUND.\n\ |
374 | SOUND is a list of the form `(sound KEYWORD VALUE...)'.\n\ | |
375 | The following keywords are recognized:\n\ | |
376 | \n\ | |
2a494b2d | 377 | :file FILE.- read sound data from FILE. If FILE isn't an\n\ |
2542139e GM |
378 | absolute file name, it is searched in `data-directory'.\n\ |
379 | \n\ | |
380 | :data DATA - read sound data from string DATA.\n\ | |
381 | \n\ | |
382 | Exactly one of :file or :data must be present.\n\ | |
383 | \n\ | |
384 | :volume VOL - set volume to VOL. VOL must an integer in the\n\ | |
385 | range 0..100 or a float in the range 0..1.0. If not specified,\n\ | |
386 | don't change the volume setting of the sound device.\n\ | |
387 | \n\ | |
388 | :device DEVICE - play sound on DEVICE. If not specified,\n\ | |
389 | a system-dependent default device name is used.") | |
7840ced1 GM |
390 | (sound) |
391 | Lisp_Object sound; | |
392 | { | |
393 | Lisp_Object attrs[SOUND_ATTR_SENTINEL]; | |
7840ced1 GM |
394 | Lisp_Object file; |
395 | struct gcpro gcpro1, gcpro2; | |
7840ced1 | 396 | struct sound_device sd; |
d1299cde | 397 | struct sound s; |
7840ced1 GM |
398 | Lisp_Object args[2]; |
399 | int count = specpdl_ptr - specpdl; | |
400 | ||
401 | file = Qnil; | |
402 | GCPRO2 (sound, file); | |
403 | bzero (&sd, sizeof sd); | |
d1299cde GM |
404 | bzero (&s, sizeof s); |
405 | current_sound_device = &sd; | |
406 | current_sound = &s; | |
7840ced1 | 407 | record_unwind_protect (sound_cleanup, Qnil); |
d1299cde | 408 | s.header = (char *) alloca (MAX_SOUND_HEADER_BYTES); |
7840ced1 GM |
409 | |
410 | /* Parse the sound specification. Give up if it is invalid. */ | |
411 | if (!parse_sound (sound, attrs)) | |
d1299cde GM |
412 | error ("Invalid sound specification"); |
413 | ||
414 | if (STRINGP (attrs[SOUND_FILE])) | |
7840ced1 | 415 | { |
d1299cde GM |
416 | /* Open the sound file. */ |
417 | s.fd = openp (Fcons (Vdata_directory, Qnil), | |
c0ec53ad | 418 | attrs[SOUND_FILE], Qnil, &file, 0); |
d1299cde GM |
419 | if (s.fd < 0) |
420 | sound_perror ("Open sound file"); | |
421 | ||
422 | /* Read the first bytes from the file. */ | |
423 | s.header_size = emacs_read (s.fd, s.header, MAX_SOUND_HEADER_BYTES); | |
424 | if (s.header_size < 0) | |
425 | sound_perror ("Reading sound file header"); | |
426 | } | |
427 | else | |
428 | { | |
429 | s.data = attrs[SOUND_DATA]; | |
430 | bcopy (XSTRING (s.data)->data, s.header, | |
431 | min (MAX_SOUND_HEADER_BYTES, STRING_BYTES (XSTRING (s.data)))); | |
7840ced1 GM |
432 | } |
433 | ||
d1299cde GM |
434 | /* Find out the type of sound. Give up if we can't tell. */ |
435 | find_sound_type (&s); | |
7840ced1 GM |
436 | |
437 | /* Set up a device. */ | |
438 | if (STRINGP (attrs[SOUND_DEVICE])) | |
439 | { | |
440 | int len = XSTRING (attrs[SOUND_DEVICE])->size; | |
441 | sd.file = (char *) alloca (len + 1); | |
442 | strcpy (sd.file, XSTRING (attrs[SOUND_DEVICE])->data); | |
443 | } | |
d1299cde | 444 | |
7840ced1 GM |
445 | if (INTEGERP (attrs[SOUND_VOLUME])) |
446 | sd.volume = XFASTINT (attrs[SOUND_VOLUME]); | |
2a53558d GM |
447 | else if (FLOATP (attrs[SOUND_VOLUME])) |
448 | sd.volume = XFLOAT_DATA (attrs[SOUND_VOLUME]) * 100; | |
7840ced1 | 449 | |
2a53558d | 450 | args[0] = Qplay_sound_functions; |
7840ced1 | 451 | args[1] = sound; |
52e386c2 | 452 | Frun_hook_with_args (2, args); |
7840ced1 | 453 | |
d1299cde GM |
454 | /* There is only one type of device we currently support, the VOX |
455 | sound driver. Set up the device interface functions for that | |
456 | device. */ | |
7840ced1 | 457 | vox_init (&sd); |
d1299cde GM |
458 | |
459 | /* Open the device. */ | |
7840ced1 GM |
460 | sd.open (&sd); |
461 | ||
d1299cde GM |
462 | /* Play the sound. */ |
463 | s.play (&s, &sd); | |
464 | ||
465 | /* Close the input file, if any. */ | |
466 | if (!STRINGP (s.data)) | |
467 | { | |
468 | emacs_close (s.fd); | |
469 | s.fd = -1; | |
470 | } | |
471 | ||
472 | /* Close the device. */ | |
7840ced1 | 473 | sd.close (&sd); |
d1299cde GM |
474 | |
475 | /* Clean up. */ | |
476 | current_sound_device = NULL; | |
477 | current_sound = NULL; | |
7840ced1 GM |
478 | UNGCPRO; |
479 | unbind_to (count, Qnil); | |
480 | return Qnil; | |
481 | } | |
482 | ||
483 | \f | |
484 | /*********************************************************************** | |
485 | Byte-order Conversion | |
486 | ***********************************************************************/ | |
487 | ||
488 | /* Convert 32-bit value VALUE which is in little-endian byte-order | |
489 | to host byte-order. */ | |
490 | ||
491 | static u_int32_t | |
492 | le2hl (value) | |
493 | u_int32_t value; | |
494 | { | |
495 | #ifdef WORDS_BIG_ENDIAN | |
496 | unsigned char *p = (unsigned char *) &value; | |
497 | value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24); | |
498 | #endif | |
499 | return value; | |
500 | } | |
501 | ||
502 | ||
503 | /* Convert 16-bit value VALUE which is in little-endian byte-order | |
504 | to host byte-order. */ | |
505 | ||
506 | static u_int16_t | |
507 | le2hs (value) | |
508 | u_int16_t value; | |
509 | { | |
510 | #ifdef WORDS_BIG_ENDIAN | |
511 | unsigned char *p = (unsigned char *) &value; | |
512 | value = p[0] + (p[1] << 8); | |
513 | #endif | |
514 | return value; | |
515 | } | |
516 | ||
517 | ||
518 | /* Convert 32-bit value VALUE which is in big-endian byte-order | |
519 | to host byte-order. */ | |
520 | ||
521 | static u_int32_t | |
522 | be2hl (value) | |
523 | u_int32_t value; | |
524 | { | |
525 | #ifndef WORDS_BIG_ENDIAN | |
526 | unsigned char *p = (unsigned char *) &value; | |
527 | value = p[3] + (p[2] << 8) + (p[1] << 16) + (p[0] << 24); | |
528 | #endif | |
529 | return value; | |
530 | } | |
531 | ||
532 | ||
9680b9d0 GM |
533 | #if 0 /* Currently not used. */ |
534 | ||
7840ced1 GM |
535 | /* Convert 16-bit value VALUE which is in big-endian byte-order |
536 | to host byte-order. */ | |
537 | ||
538 | static u_int16_t | |
539 | be2hs (value) | |
540 | u_int16_t value; | |
541 | { | |
542 | #ifndef WORDS_BIG_ENDIAN | |
543 | unsigned char *p = (unsigned char *) &value; | |
544 | value = p[1] + (p[0] << 8); | |
545 | #endif | |
546 | return value; | |
547 | } | |
548 | ||
9680b9d0 | 549 | #endif /* 0 */ |
7840ced1 GM |
550 | |
551 | \f | |
552 | /*********************************************************************** | |
553 | RIFF-WAVE (*.wav) | |
554 | ***********************************************************************/ | |
555 | ||
d1299cde | 556 | /* Try to initialize sound file S from S->header. S->header |
7840ced1 GM |
557 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
558 | sound file. If the file is a WAV-format file, set up interface | |
d1299cde | 559 | functions in S and convert header fields to host byte-order. |
7840ced1 GM |
560 | Value is non-zero if the file is a WAV file. */ |
561 | ||
562 | static int | |
d1299cde GM |
563 | wav_init (s) |
564 | struct sound *s; | |
7840ced1 | 565 | { |
d1299cde GM |
566 | struct wav_header *header = (struct wav_header *) s->header; |
567 | ||
568 | if (s->header_size < sizeof *header | |
569 | || bcmp (s->header, "RIFF", 4) != 0) | |
7840ced1 GM |
570 | return 0; |
571 | ||
572 | /* WAV files are in little-endian order. Convert the header | |
573 | if on a big-endian machine. */ | |
574 | header->magic = le2hl (header->magic); | |
575 | header->length = le2hl (header->length); | |
576 | header->chunk_type = le2hl (header->chunk_type); | |
577 | header->chunk_format = le2hl (header->chunk_format); | |
578 | header->chunk_length = le2hl (header->chunk_length); | |
579 | header->format = le2hs (header->format); | |
580 | header->channels = le2hs (header->channels); | |
581 | header->sample_rate = le2hl (header->sample_rate); | |
582 | header->bytes_per_second = le2hl (header->bytes_per_second); | |
583 | header->sample_size = le2hs (header->sample_size); | |
584 | header->precision = le2hs (header->precision); | |
585 | header->chunk_data = le2hl (header->chunk_data); | |
586 | header->data_length = le2hl (header->data_length); | |
587 | ||
588 | /* Set up the interface functions for WAV. */ | |
d1299cde GM |
589 | s->type = RIFF; |
590 | s->play = wav_play; | |
7840ced1 GM |
591 | |
592 | return 1; | |
593 | } | |
594 | ||
595 | ||
d1299cde | 596 | /* Play RIFF-WAVE audio file S on sound device SD. */ |
7840ced1 GM |
597 | |
598 | static void | |
d1299cde GM |
599 | wav_play (s, sd) |
600 | struct sound *s; | |
7840ced1 GM |
601 | struct sound_device *sd; |
602 | { | |
d1299cde | 603 | struct wav_header *header = (struct wav_header *) s->header; |
7840ced1 GM |
604 | |
605 | /* Let the device choose a suitable device-dependent format | |
606 | for the file. */ | |
d1299cde | 607 | sd->choose_format (sd, s); |
7840ced1 GM |
608 | |
609 | /* Configure the device. */ | |
610 | sd->sample_size = header->sample_size; | |
611 | sd->sample_rate = header->sample_rate; | |
612 | sd->bps = header->bytes_per_second; | |
613 | sd->channels = header->channels; | |
614 | sd->configure (sd); | |
615 | ||
616 | /* Copy sound data to the device. The WAV file specification is | |
617 | actually more complex. This simple scheme worked with all WAV | |
618 | files I found so far. If someone feels inclined to implement the | |
619 | whole RIFF-WAVE spec, please do. */ | |
d1299cde GM |
620 | if (STRINGP (s->data)) |
621 | sd->write (sd, XSTRING (s->data)->data + sizeof *header, | |
622 | STRING_BYTES (XSTRING (s->data)) - sizeof *header); | |
623 | else | |
624 | { | |
625 | char *buffer; | |
626 | int nbytes; | |
627 | int blksize = 2048; | |
628 | ||
629 | buffer = (char *) alloca (blksize); | |
630 | lseek (s->fd, sizeof *header, SEEK_SET); | |
7840ced1 | 631 | |
d1299cde GM |
632 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) |
633 | sd->write (sd, buffer, nbytes); | |
7840ced1 | 634 | |
d1299cde GM |
635 | if (nbytes < 0) |
636 | sound_perror ("Reading sound file"); | |
637 | } | |
7840ced1 GM |
638 | } |
639 | ||
640 | ||
641 | \f | |
642 | /*********************************************************************** | |
643 | Sun Audio (*.au) | |
644 | ***********************************************************************/ | |
645 | ||
646 | /* Sun audio file encodings. */ | |
647 | ||
648 | enum au_encoding | |
649 | { | |
650 | AU_ENCODING_ULAW_8 = 1, | |
651 | AU_ENCODING_8, | |
652 | AU_ENCODING_16, | |
653 | AU_ENCODING_24, | |
654 | AU_ENCODING_32, | |
655 | AU_ENCODING_IEEE32, | |
656 | AU_ENCODING_IEEE64, | |
657 | AU_COMPRESSED = 23 | |
658 | }; | |
659 | ||
660 | ||
d1299cde | 661 | /* Try to initialize sound file S from S->header. S->header |
7840ced1 GM |
662 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
663 | sound file. If the file is a AU-format file, set up interface | |
d1299cde | 664 | functions in S and convert header fields to host byte-order. |
7840ced1 GM |
665 | Value is non-zero if the file is an AU file. */ |
666 | ||
667 | static int | |
d1299cde GM |
668 | au_init (s) |
669 | struct sound *s; | |
7840ced1 | 670 | { |
d1299cde | 671 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 | 672 | |
d1299cde GM |
673 | if (s->header_size < sizeof *header |
674 | || bcmp (s->header, ".snd", 4) != 0) | |
7840ced1 GM |
675 | return 0; |
676 | ||
677 | header->magic_number = be2hl (header->magic_number); | |
678 | header->data_offset = be2hl (header->data_offset); | |
679 | header->data_size = be2hl (header->data_size); | |
680 | header->encoding = be2hl (header->encoding); | |
681 | header->sample_rate = be2hl (header->sample_rate); | |
682 | header->channels = be2hl (header->channels); | |
683 | ||
684 | /* Set up the interface functions for AU. */ | |
d1299cde GM |
685 | s->type = SUN_AUDIO; |
686 | s->play = au_play; | |
7840ced1 GM |
687 | |
688 | return 1; | |
689 | } | |
690 | ||
691 | ||
d1299cde | 692 | /* Play Sun audio file S on sound device SD. */ |
7840ced1 GM |
693 | |
694 | static void | |
d1299cde GM |
695 | au_play (s, sd) |
696 | struct sound *s; | |
7840ced1 GM |
697 | struct sound_device *sd; |
698 | { | |
d1299cde | 699 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 GM |
700 | |
701 | sd->sample_size = 0; | |
702 | sd->sample_rate = header->sample_rate; | |
703 | sd->bps = 0; | |
704 | sd->channels = header->channels; | |
d1299cde | 705 | sd->choose_format (sd, s); |
7840ced1 | 706 | sd->configure (sd); |
d1299cde GM |
707 | |
708 | if (STRINGP (s->data)) | |
709 | sd->write (sd, XSTRING (s->data)->data + header->data_offset, | |
710 | STRING_BYTES (XSTRING (s->data)) - header->data_offset); | |
711 | else | |
712 | { | |
713 | int blksize = 2048; | |
714 | char *buffer; | |
715 | int nbytes; | |
7840ced1 | 716 | |
d1299cde GM |
717 | /* Seek */ |
718 | lseek (s->fd, header->data_offset, SEEK_SET); | |
7840ced1 | 719 | |
d1299cde GM |
720 | /* Copy sound data to the device. */ |
721 | buffer = (char *) alloca (blksize); | |
722 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) | |
723 | sd->write (sd, buffer, nbytes); | |
724 | ||
725 | if (nbytes < 0) | |
726 | sound_perror ("Reading sound file"); | |
727 | } | |
7840ced1 GM |
728 | } |
729 | ||
730 | ||
731 | \f | |
732 | /*********************************************************************** | |
733 | Voxware Driver Interface | |
734 | ***********************************************************************/ | |
735 | ||
736 | /* This driver is available on GNU/Linux, and the free BSDs. FreeBSD | |
737 | has a compatible own driver aka Luigi's driver. */ | |
738 | ||
739 | ||
740 | /* Open device SD. If SD->file is non-null, open that device, | |
741 | otherwise use a default device name. */ | |
742 | ||
743 | static void | |
744 | vox_open (sd) | |
745 | struct sound_device *sd; | |
746 | { | |
747 | char *file; | |
748 | ||
749 | /* Open the sound device. Default is /dev/dsp. */ | |
750 | if (sd->file) | |
751 | file = sd->file; | |
752 | else | |
80fcd514 | 753 | file = DEFAULT_SOUND_DEVICE; |
7840ced1 | 754 | |
68c45bf0 | 755 | sd->fd = emacs_open (file, O_WRONLY, 0); |
7840ced1 GM |
756 | if (sd->fd < 0) |
757 | sound_perror (file); | |
758 | } | |
759 | ||
760 | ||
761 | /* Configure device SD from parameters in it. */ | |
762 | ||
763 | static void | |
764 | vox_configure (sd) | |
765 | struct sound_device *sd; | |
766 | { | |
28fcb7dc | 767 | int val; |
7840ced1 GM |
768 | |
769 | xassert (sd->fd >= 0); | |
770 | ||
bb6e8cee GM |
771 | /* On GNU/Linux, it seems that the device driver doesn't like to be |
772 | interrupted by a signal. Block the ones we know to cause | |
773 | troubles. */ | |
b5cb1ada | 774 | turn_on_atimers (0); |
bb6e8cee GM |
775 | #ifdef SIGIO |
776 | sigblock (sigmask (SIGIO)); | |
777 | #endif | |
b5cb1ada | 778 | |
28fcb7dc GM |
779 | val = sd->format; |
780 | if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0 | |
781 | || val != sd->format) | |
782 | sound_perror ("Set sound format"); | |
7840ced1 | 783 | |
28fcb7dc GM |
784 | val = sd->channels != 1; |
785 | if (ioctl (sd->fd, SNDCTL_DSP_STEREO, &val) < 0 | |
786 | || val != (sd->channels != 1)) | |
787 | sound_perror ("Set stereo/mono"); | |
7840ced1 | 788 | |
28fcb7dc GM |
789 | /* I think bps and sampling_rate are the same, but who knows. |
790 | Check this. and use SND_DSP_SPEED for both. */ | |
791 | if (sd->sample_rate > 0) | |
792 | { | |
793 | val = sd->sample_rate; | |
794 | if (ioctl (sd->fd, SNDCTL_DSP_SPEED, &sd->sample_rate) < 0 | |
795 | || val != sd->sample_rate) | |
796 | sound_perror ("Set sound speed"); | |
797 | } | |
7840ced1 | 798 | |
3887b449 GM |
799 | if (sd->volume > 0) |
800 | { | |
801 | int volume = sd->volume & 0xff; | |
802 | volume |= volume << 8; | |
28fcb7dc GM |
803 | /* This may fail if there is no mixer. Ignore the failure. */ |
804 | ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &volume); | |
3887b449 | 805 | } |
b5cb1ada GM |
806 | |
807 | turn_on_atimers (1); | |
bb6e8cee GM |
808 | #ifdef SIGIO |
809 | sigunblock (sigmask (SIGIO)); | |
810 | #endif | |
7840ced1 GM |
811 | } |
812 | ||
813 | ||
814 | /* Close device SD if it is open. */ | |
815 | ||
816 | static void | |
817 | vox_close (sd) | |
818 | struct sound_device *sd; | |
819 | { | |
820 | if (sd->fd >= 0) | |
821 | { | |
bb6e8cee GM |
822 | /* On GNU/Linux, it seems that the device driver doesn't like to |
823 | be interrupted by a signal. Block the ones we know to cause | |
824 | troubles. */ | |
825 | #ifdef SIGIO | |
826 | sigblock (sigmask (SIGIO)); | |
827 | #endif | |
b5cb1ada | 828 | turn_on_atimers (0); |
bb6e8cee GM |
829 | |
830 | /* Flush sound data, and reset the device. */ | |
7840ced1 | 831 | ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL); |
bb6e8cee | 832 | |
b5cb1ada | 833 | turn_on_atimers (1); |
bb6e8cee GM |
834 | #ifdef SIGIO |
835 | sigunblock (sigmask (SIGIO)); | |
836 | #endif | |
7840ced1 GM |
837 | |
838 | /* Close the device. */ | |
68c45bf0 | 839 | emacs_close (sd->fd); |
7840ced1 GM |
840 | sd->fd = -1; |
841 | } | |
842 | } | |
843 | ||
844 | ||
d1299cde | 845 | /* Choose device-dependent format for device SD from sound file S. */ |
7840ced1 GM |
846 | |
847 | static void | |
d1299cde | 848 | vox_choose_format (sd, s) |
7840ced1 | 849 | struct sound_device *sd; |
d1299cde | 850 | struct sound *s; |
7840ced1 | 851 | { |
d1299cde | 852 | if (s->type == RIFF) |
7840ced1 | 853 | { |
d1299cde | 854 | struct wav_header *h = (struct wav_header *) s->header; |
7840ced1 GM |
855 | if (h->precision == 8) |
856 | sd->format = AFMT_U8; | |
857 | else if (h->precision == 16) | |
858 | sd->format = AFMT_S16_LE; | |
859 | else | |
860 | error ("Unsupported WAV file format"); | |
861 | } | |
d1299cde | 862 | else if (s->type == SUN_AUDIO) |
7840ced1 | 863 | { |
d1299cde | 864 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 GM |
865 | switch (header->encoding) |
866 | { | |
867 | case AU_ENCODING_ULAW_8: | |
868 | case AU_ENCODING_IEEE32: | |
869 | case AU_ENCODING_IEEE64: | |
870 | sd->format = AFMT_MU_LAW; | |
871 | break; | |
872 | ||
873 | case AU_ENCODING_8: | |
874 | case AU_ENCODING_16: | |
875 | case AU_ENCODING_24: | |
876 | case AU_ENCODING_32: | |
877 | sd->format = AFMT_S16_LE; | |
878 | break; | |
879 | ||
880 | default: | |
881 | error ("Unsupported AU file format"); | |
882 | } | |
883 | } | |
884 | else | |
885 | abort (); | |
886 | } | |
887 | ||
888 | ||
889 | /* Initialize device SD. Set up the interface functions in the device | |
890 | structure. */ | |
891 | ||
892 | static void | |
893 | vox_init (sd) | |
894 | struct sound_device *sd; | |
895 | { | |
896 | sd->fd = -1; | |
897 | sd->open = vox_open; | |
898 | sd->close = vox_close; | |
899 | sd->configure = vox_configure; | |
900 | sd->choose_format = vox_choose_format; | |
901 | sd->write = vox_write; | |
902 | } | |
903 | ||
904 | ||
905 | /* Write NBYTES bytes from BUFFER to device SD. */ | |
906 | ||
907 | static void | |
908 | vox_write (sd, buffer, nbytes) | |
909 | struct sound_device *sd; | |
910 | char *buffer; | |
911 | int nbytes; | |
912 | { | |
68c45bf0 | 913 | int nwritten = emacs_write (sd->fd, buffer, nbytes); |
7840ced1 GM |
914 | if (nwritten < 0) |
915 | sound_perror ("Writing to sound device"); | |
916 | } | |
917 | ||
918 | ||
919 | \f | |
920 | /*********************************************************************** | |
921 | Initialization | |
922 | ***********************************************************************/ | |
923 | ||
924 | void | |
925 | syms_of_sound () | |
926 | { | |
927 | QCdevice = intern (":device"); | |
928 | staticpro (&QCdevice); | |
929 | QCvolume = intern (":volume"); | |
930 | staticpro (&QCvolume); | |
931 | Qsound = intern ("sound"); | |
932 | staticpro (&Qsound); | |
2a53558d GM |
933 | Qplay_sound_functions = intern ("play-sound-functions"); |
934 | staticpro (&Qplay_sound_functions); | |
7840ced1 GM |
935 | |
936 | defsubr (&Splay_sound); | |
937 | } | |
938 | ||
939 | ||
940 | void | |
941 | init_sound () | |
942 | { | |
943 | } | |
944 | ||
945 | #endif /* HAVE_SOUND */ |