Commit | Line | Data |
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7840ced1 | 1 | /* sound.c -- sound support. |
68c45bf0 | 2 | Copyright (C) 1998, 1999 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 | ||
28 | #include <lisp.h> | |
29 | #include <fcntl.h> | |
30 | #include <unistd.h> | |
31 | #include <sys/types.h> | |
32 | #include <dispextern.h> | |
33 | #include <errno.h> | |
34 | ||
35 | /* FreeBSD has machine/soundcard.h. Voxware sound driver docs mention | |
36 | sys/soundcard.h. So, let's try whatever's there. */ | |
37 | ||
38 | #ifdef HAVE_MACHINE_SOUNDCARD_H | |
39 | #include <machine/soundcard.h> | |
40 | #endif | |
41 | #ifdef HAVE_SYS_SOUNDCARD_H | |
42 | #include <sys/soundcard.h> | |
43 | #endif | |
80fcd514 KR |
44 | #ifdef HAVE_SOUNDCARD_H |
45 | #include <sys/ioctl.h> | |
46 | #include <soundcard.h> | |
47 | #endif | |
48 | ||
49 | #ifndef DEFAULT_SOUND_DEVICE | |
50 | #define DEFAULT_SOUND_DEVICE "/dev/dsp" | |
51 | #endif | |
7840ced1 GM |
52 | |
53 | #define max(X, Y) ((X) > (Y) ? (X) : (Y)) | |
54 | #define min(X, Y) ((X) < (Y) ? (X) : (Y)) | |
55 | #define abs(X) ((X) < 0 ? -(X) : (X)) | |
56 | ||
57 | /* Structure forward declarations. */ | |
58 | ||
d1299cde | 59 | struct sound; |
7840ced1 GM |
60 | struct sound_device; |
61 | ||
62 | /* The file header of RIFF-WAVE files (*.wav). Files are always in | |
63 | little-endian byte-order. */ | |
64 | ||
65 | struct wav_header | |
66 | { | |
67 | u_int32_t magic; | |
68 | u_int32_t length; | |
69 | u_int32_t chunk_type; | |
70 | u_int32_t chunk_format; | |
71 | u_int32_t chunk_length; | |
72 | u_int16_t format; | |
73 | u_int16_t channels; | |
74 | u_int32_t sample_rate; | |
75 | u_int32_t bytes_per_second; | |
76 | u_int16_t sample_size; | |
77 | u_int16_t precision; | |
78 | u_int32_t chunk_data; | |
79 | u_int32_t data_length; | |
80 | }; | |
81 | ||
82 | /* The file header of Sun adio files (*.au). Files are always in | |
83 | big-endian byte-order. */ | |
84 | ||
85 | struct au_header | |
86 | { | |
87 | /* ASCII ".snd" */ | |
88 | u_int32_t magic_number; | |
89 | ||
90 | /* Offset of data part from start of file. Minimum value is 24. */ | |
91 | u_int32_t data_offset; | |
92 | ||
93 | /* Size of data part, 0xffffffff if unknown. */ | |
94 | u_int32_t data_size; | |
95 | ||
96 | /* Data encoding format. | |
97 | 1 8-bit ISDN u-law | |
98 | 2 8-bit linear PCM (REF-PCM) | |
99 | 3 16-bit linear PCM | |
100 | 4 24-bit linear PCM | |
101 | 5 32-bit linear PCM | |
102 | 6 32-bit IEEE floating-point | |
103 | 7 64-bit IEEE floating-point | |
104 | 23 8-bit u-law compressed using CCITT 0.721 ADPCM voice data | |
105 | encoding scheme. */ | |
106 | u_int32_t encoding; | |
107 | ||
108 | /* Number of samples per second. */ | |
109 | u_int32_t sample_rate; | |
110 | ||
111 | /* Number of interleaved channels. */ | |
112 | u_int32_t channels; | |
113 | }; | |
114 | ||
115 | /* Maximum of all sound file headers sizes. */ | |
116 | ||
117 | #define MAX_SOUND_HEADER_BYTES \ | |
118 | max (sizeof (struct wav_header), sizeof (struct au_header)) | |
119 | ||
120 | /* Interface structure for sound devices. */ | |
121 | ||
122 | struct sound_device | |
123 | { | |
124 | /* The name of the device or null meaning use a default device name. */ | |
125 | char *file; | |
126 | ||
127 | /* File descriptor of the device. */ | |
128 | int fd; | |
129 | ||
130 | /* Device-dependent format. */ | |
131 | int format; | |
132 | ||
133 | /* Volume (0..100). Zero means unspecified. */ | |
134 | int volume; | |
135 | ||
136 | /* Sample size. */ | |
137 | int sample_size; | |
138 | ||
139 | /* Sample rate. */ | |
140 | int sample_rate; | |
141 | ||
142 | /* Bytes per second. */ | |
143 | int bps; | |
144 | ||
145 | /* 1 = mono, 2 = stereo, 0 = don't set. */ | |
146 | int channels; | |
147 | ||
148 | /* Open device SD. */ | |
149 | void (* open) P_ ((struct sound_device *sd)); | |
150 | ||
151 | /* Close device SD. */ | |
152 | void (* close) P_ ((struct sound_device *sd)); | |
153 | ||
154 | /* Configure SD accoring to device-dependent parameters. */ | |
155 | void (* configure) P_ ((struct sound_device *device)); | |
156 | ||
d1299cde | 157 | /* Choose a device-dependent format for outputting sound S. */ |
7840ced1 | 158 | void (* choose_format) P_ ((struct sound_device *sd, |
d1299cde | 159 | struct sound *s)); |
7840ced1 GM |
160 | |
161 | /* Write NYBTES bytes from BUFFER to device SD. */ | |
162 | void (* write) P_ ((struct sound_device *sd, char *buffer, int nbytes)); | |
163 | ||
164 | /* A place for devices to store additional data. */ | |
165 | void *data; | |
166 | }; | |
167 | ||
168 | /* An enumerator for each supported sound file type. */ | |
169 | ||
170 | enum sound_type | |
171 | { | |
172 | RIFF, | |
173 | SUN_AUDIO | |
174 | }; | |
175 | ||
176 | /* Interface structure for sound files. */ | |
177 | ||
d1299cde | 178 | struct sound |
7840ced1 GM |
179 | { |
180 | /* The type of the file. */ | |
181 | enum sound_type type; | |
182 | ||
d1299cde | 183 | /* File descriptor of a sound file. */ |
7840ced1 GM |
184 | int fd; |
185 | ||
d1299cde GM |
186 | /* Pointer to sound file header. This contains header_size bytes |
187 | read from the start of a sound file. */ | |
7840ced1 GM |
188 | char *header; |
189 | ||
d1299cde GM |
190 | /* Number of bytes raed from sound file. This is always <= |
191 | MAX_SOUND_HEADER_BYTES. */ | |
192 | int header_size; | |
193 | ||
194 | /* Sound data, if a string. */ | |
195 | Lisp_Object data; | |
196 | ||
197 | /* Play sound file S on device SD. */ | |
198 | void (* play) P_ ((struct sound *s, struct sound_device *sd)); | |
7840ced1 GM |
199 | }; |
200 | ||
201 | /* Indices of attributes in a sound attributes vector. */ | |
202 | ||
203 | enum sound_attr | |
204 | { | |
205 | SOUND_FILE, | |
d1299cde | 206 | SOUND_DATA, |
7840ced1 GM |
207 | SOUND_DEVICE, |
208 | SOUND_VOLUME, | |
209 | SOUND_ATTR_SENTINEL | |
210 | }; | |
211 | ||
212 | /* Symbols. */ | |
213 | ||
d1299cde | 214 | extern Lisp_Object QCfile, QCdata; |
7840ced1 GM |
215 | Lisp_Object QCvolume, QCdevice; |
216 | Lisp_Object Qsound; | |
2a53558d | 217 | Lisp_Object Qplay_sound_functions; |
7840ced1 GM |
218 | |
219 | /* These are set during `play-sound' so that sound_cleanup has | |
220 | access to them. */ | |
221 | ||
d1299cde GM |
222 | struct sound_device *current_sound_device; |
223 | struct sound *current_sound; | |
7840ced1 GM |
224 | |
225 | /* Function prototypes. */ | |
226 | ||
227 | static void vox_open P_ ((struct sound_device *)); | |
228 | static void vox_configure P_ ((struct sound_device *)); | |
229 | static void vox_close P_ ((struct sound_device *sd)); | |
d1299cde | 230 | static void vox_choose_format P_ ((struct sound_device *, struct sound *)); |
7840ced1 GM |
231 | static void vox_init P_ ((struct sound_device *)); |
232 | static void vox_write P_ ((struct sound_device *, char *, int)); | |
233 | static void sound_perror P_ ((char *)); | |
234 | static int parse_sound P_ ((Lisp_Object, Lisp_Object *)); | |
d1299cde | 235 | static void find_sound_type P_ ((struct sound *)); |
7840ced1 GM |
236 | static u_int32_t le2hl P_ ((u_int32_t)); |
237 | static u_int16_t le2hs P_ ((u_int16_t)); | |
238 | static u_int32_t be2hl P_ ((u_int32_t)); | |
d1299cde GM |
239 | static int wav_init P_ ((struct sound *)); |
240 | static void wav_play P_ ((struct sound *, struct sound_device *)); | |
241 | static int au_init P_ ((struct sound *)); | |
242 | static void au_play P_ ((struct sound *, struct sound_device *)); | |
7840ced1 | 243 | |
9680b9d0 GM |
244 | #if 0 /* Currently not used. */ |
245 | static u_int16_t be2hs P_ ((u_int16_t)); | |
246 | #endif | |
247 | ||
7840ced1 GM |
248 | |
249 | \f | |
250 | /*********************************************************************** | |
251 | General | |
252 | ***********************************************************************/ | |
253 | ||
254 | /* Like perror, but signals an error. */ | |
255 | ||
256 | static void | |
257 | sound_perror (msg) | |
258 | char *msg; | |
259 | { | |
260 | error ("%s: %s", msg, strerror (errno)); | |
261 | } | |
262 | ||
263 | ||
264 | /* Parse sound specification SOUND, and fill ATTRS with what is | |
265 | found. Value is non-zero if SOUND Is a valid sound specification. | |
266 | A valid sound specification is a list starting with the symbol | |
267 | `sound'. The rest of the list is a property list which may | |
268 | contain the following key/value pairs: | |
269 | ||
270 | - `:file FILE' | |
271 | ||
272 | FILE is the sound file to play. If it isn't an absolute name, | |
273 | it's searched under `data-directory'. | |
274 | ||
d1299cde GM |
275 | - `:data DATA' |
276 | ||
277 | DATA is a string containing sound data. Either :file or :data | |
278 | may be present, but not both. | |
279 | ||
7840ced1 GM |
280 | - `:device DEVICE' |
281 | ||
282 | DEVICE is the name of the device to play on, e.g. "/dev/dsp2". | |
283 | If not specified, a default device is used. | |
284 | ||
285 | - `:volume VOL' | |
286 | ||
2a53558d GM |
287 | VOL must be an integer in the range [0, 100], or a float in the |
288 | range [0, 1]. */ | |
7840ced1 GM |
289 | |
290 | static int | |
291 | parse_sound (sound, attrs) | |
292 | Lisp_Object sound; | |
293 | Lisp_Object *attrs; | |
294 | { | |
295 | /* SOUND must be a list starting with the symbol `sound'. */ | |
296 | if (!CONSP (sound) || !EQ (XCAR (sound), Qsound)) | |
297 | return 0; | |
298 | ||
299 | sound = XCDR (sound); | |
300 | attrs[SOUND_FILE] = Fplist_get (sound, QCfile); | |
d1299cde | 301 | attrs[SOUND_DATA] = Fplist_get (sound, QCdata); |
7840ced1 GM |
302 | attrs[SOUND_DEVICE] = Fplist_get (sound, QCdevice); |
303 | attrs[SOUND_VOLUME] = Fplist_get (sound, QCvolume); | |
304 | ||
d1299cde GM |
305 | /* File name or data must be specified. */ |
306 | if (!STRINGP (attrs[SOUND_FILE]) | |
307 | && !STRINGP (attrs[SOUND_DATA])) | |
7840ced1 GM |
308 | return 0; |
309 | ||
310 | /* Volume must be in the range 0..100 or unspecified. */ | |
311 | if (!NILP (attrs[SOUND_VOLUME])) | |
312 | { | |
2a53558d GM |
313 | if (INTEGERP (attrs[SOUND_VOLUME])) |
314 | { | |
315 | if (XINT (attrs[SOUND_VOLUME]) < 0 | |
316 | || XINT (attrs[SOUND_VOLUME]) > 100) | |
317 | return 0; | |
318 | } | |
319 | else if (FLOATP (attrs[SOUND_VOLUME])) | |
320 | { | |
321 | if (XFLOAT_DATA (attrs[SOUND_VOLUME]) < 0 | |
322 | || XFLOAT_DATA (attrs[SOUND_VOLUME]) > 1) | |
323 | return 0; | |
324 | } | |
325 | else | |
7840ced1 GM |
326 | return 0; |
327 | } | |
328 | ||
329 | /* Device must be a string or unspecified. */ | |
330 | if (!NILP (attrs[SOUND_DEVICE]) | |
331 | && !STRINGP (attrs[SOUND_DEVICE])) | |
332 | return 0; | |
333 | ||
334 | return 1; | |
335 | } | |
336 | ||
337 | ||
338 | /* Find out the type of the sound file whose file descriptor is FD. | |
d1299cde | 339 | S is the sound file structure to fill in. */ |
7840ced1 GM |
340 | |
341 | static void | |
d1299cde GM |
342 | find_sound_type (s) |
343 | struct sound *s; | |
7840ced1 | 344 | { |
d1299cde GM |
345 | if (!wav_init (s) && !au_init (s)) |
346 | error ("Unknown sound format"); | |
7840ced1 GM |
347 | } |
348 | ||
349 | ||
350 | /* Function installed by play-sound with record_unwind_protect. */ | |
351 | ||
352 | static Lisp_Object | |
353 | sound_cleanup (arg) | |
354 | Lisp_Object arg; | |
355 | { | |
d1299cde | 356 | if (current_sound_device) |
7840ced1 | 357 | { |
66e4690f KR |
358 | if (current_sound_device->close) |
359 | current_sound_device->close (current_sound_device); | |
d1299cde GM |
360 | if (current_sound->fd > 0) |
361 | emacs_close (current_sound->fd); | |
7840ced1 | 362 | } |
3887b449 GM |
363 | |
364 | return Qnil; | |
7840ced1 GM |
365 | } |
366 | ||
367 | ||
368 | DEFUN ("play-sound", Fplay_sound, Splay_sound, 1, 1, 0, | |
2542139e GM |
369 | "Play sound SOUND.\n\ |
370 | SOUND is a list of the form `(sound KEYWORD VALUE...)'.\n\ | |
371 | The following keywords are recognized:\n\ | |
372 | \n\ | |
2a494b2d | 373 | :file FILE.- read sound data from FILE. If FILE isn't an\n\ |
2542139e GM |
374 | absolute file name, it is searched in `data-directory'.\n\ |
375 | \n\ | |
376 | :data DATA - read sound data from string DATA.\n\ | |
377 | \n\ | |
378 | Exactly one of :file or :data must be present.\n\ | |
379 | \n\ | |
380 | :volume VOL - set volume to VOL. VOL must an integer in the\n\ | |
381 | range 0..100 or a float in the range 0..1.0. If not specified,\n\ | |
382 | don't change the volume setting of the sound device.\n\ | |
383 | \n\ | |
384 | :device DEVICE - play sound on DEVICE. If not specified,\n\ | |
385 | a system-dependent default device name is used.") | |
7840ced1 GM |
386 | (sound) |
387 | Lisp_Object sound; | |
388 | { | |
389 | Lisp_Object attrs[SOUND_ATTR_SENTINEL]; | |
7840ced1 GM |
390 | Lisp_Object file; |
391 | struct gcpro gcpro1, gcpro2; | |
7840ced1 | 392 | struct sound_device sd; |
d1299cde | 393 | struct sound s; |
7840ced1 GM |
394 | Lisp_Object args[2]; |
395 | int count = specpdl_ptr - specpdl; | |
396 | ||
397 | file = Qnil; | |
398 | GCPRO2 (sound, file); | |
399 | bzero (&sd, sizeof sd); | |
d1299cde GM |
400 | bzero (&s, sizeof s); |
401 | current_sound_device = &sd; | |
402 | current_sound = &s; | |
7840ced1 | 403 | record_unwind_protect (sound_cleanup, Qnil); |
d1299cde | 404 | s.header = (char *) alloca (MAX_SOUND_HEADER_BYTES); |
7840ced1 GM |
405 | |
406 | /* Parse the sound specification. Give up if it is invalid. */ | |
407 | if (!parse_sound (sound, attrs)) | |
d1299cde GM |
408 | error ("Invalid sound specification"); |
409 | ||
410 | if (STRINGP (attrs[SOUND_FILE])) | |
7840ced1 | 411 | { |
d1299cde GM |
412 | /* Open the sound file. */ |
413 | s.fd = openp (Fcons (Vdata_directory, Qnil), | |
414 | attrs[SOUND_FILE], "", &file, 0); | |
415 | if (s.fd < 0) | |
416 | sound_perror ("Open sound file"); | |
417 | ||
418 | /* Read the first bytes from the file. */ | |
419 | s.header_size = emacs_read (s.fd, s.header, MAX_SOUND_HEADER_BYTES); | |
420 | if (s.header_size < 0) | |
421 | sound_perror ("Reading sound file header"); | |
422 | } | |
423 | else | |
424 | { | |
425 | s.data = attrs[SOUND_DATA]; | |
426 | bcopy (XSTRING (s.data)->data, s.header, | |
427 | min (MAX_SOUND_HEADER_BYTES, STRING_BYTES (XSTRING (s.data)))); | |
7840ced1 GM |
428 | } |
429 | ||
d1299cde GM |
430 | /* Find out the type of sound. Give up if we can't tell. */ |
431 | find_sound_type (&s); | |
7840ced1 GM |
432 | |
433 | /* Set up a device. */ | |
434 | if (STRINGP (attrs[SOUND_DEVICE])) | |
435 | { | |
436 | int len = XSTRING (attrs[SOUND_DEVICE])->size; | |
437 | sd.file = (char *) alloca (len + 1); | |
438 | strcpy (sd.file, XSTRING (attrs[SOUND_DEVICE])->data); | |
439 | } | |
d1299cde | 440 | |
7840ced1 GM |
441 | if (INTEGERP (attrs[SOUND_VOLUME])) |
442 | sd.volume = XFASTINT (attrs[SOUND_VOLUME]); | |
2a53558d GM |
443 | else if (FLOATP (attrs[SOUND_VOLUME])) |
444 | sd.volume = XFLOAT_DATA (attrs[SOUND_VOLUME]) * 100; | |
7840ced1 | 445 | |
2a53558d | 446 | args[0] = Qplay_sound_functions; |
7840ced1 | 447 | args[1] = sound; |
52e386c2 | 448 | Frun_hook_with_args (2, args); |
7840ced1 | 449 | |
d1299cde GM |
450 | /* There is only one type of device we currently support, the VOX |
451 | sound driver. Set up the device interface functions for that | |
452 | device. */ | |
7840ced1 | 453 | vox_init (&sd); |
d1299cde GM |
454 | |
455 | /* Open the device. */ | |
7840ced1 GM |
456 | sd.open (&sd); |
457 | ||
d1299cde GM |
458 | /* Play the sound. */ |
459 | s.play (&s, &sd); | |
460 | ||
461 | /* Close the input file, if any. */ | |
462 | if (!STRINGP (s.data)) | |
463 | { | |
464 | emacs_close (s.fd); | |
465 | s.fd = -1; | |
466 | } | |
467 | ||
468 | /* Close the device. */ | |
7840ced1 | 469 | sd.close (&sd); |
d1299cde GM |
470 | |
471 | /* Clean up. */ | |
472 | current_sound_device = NULL; | |
473 | current_sound = NULL; | |
7840ced1 GM |
474 | UNGCPRO; |
475 | unbind_to (count, Qnil); | |
476 | return Qnil; | |
477 | } | |
478 | ||
479 | \f | |
480 | /*********************************************************************** | |
481 | Byte-order Conversion | |
482 | ***********************************************************************/ | |
483 | ||
484 | /* Convert 32-bit value VALUE which is in little-endian byte-order | |
485 | to host byte-order. */ | |
486 | ||
487 | static u_int32_t | |
488 | le2hl (value) | |
489 | u_int32_t value; | |
490 | { | |
491 | #ifdef WORDS_BIG_ENDIAN | |
492 | unsigned char *p = (unsigned char *) &value; | |
493 | value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24); | |
494 | #endif | |
495 | return value; | |
496 | } | |
497 | ||
498 | ||
499 | /* Convert 16-bit value VALUE which is in little-endian byte-order | |
500 | to host byte-order. */ | |
501 | ||
502 | static u_int16_t | |
503 | le2hs (value) | |
504 | u_int16_t value; | |
505 | { | |
506 | #ifdef WORDS_BIG_ENDIAN | |
507 | unsigned char *p = (unsigned char *) &value; | |
508 | value = p[0] + (p[1] << 8); | |
509 | #endif | |
510 | return value; | |
511 | } | |
512 | ||
513 | ||
514 | /* Convert 32-bit value VALUE which is in big-endian byte-order | |
515 | to host byte-order. */ | |
516 | ||
517 | static u_int32_t | |
518 | be2hl (value) | |
519 | u_int32_t value; | |
520 | { | |
521 | #ifndef WORDS_BIG_ENDIAN | |
522 | unsigned char *p = (unsigned char *) &value; | |
523 | value = p[3] + (p[2] << 8) + (p[1] << 16) + (p[0] << 24); | |
524 | #endif | |
525 | return value; | |
526 | } | |
527 | ||
528 | ||
9680b9d0 GM |
529 | #if 0 /* Currently not used. */ |
530 | ||
7840ced1 GM |
531 | /* Convert 16-bit value VALUE which is in big-endian byte-order |
532 | to host byte-order. */ | |
533 | ||
534 | static u_int16_t | |
535 | be2hs (value) | |
536 | u_int16_t value; | |
537 | { | |
538 | #ifndef WORDS_BIG_ENDIAN | |
539 | unsigned char *p = (unsigned char *) &value; | |
540 | value = p[1] + (p[0] << 8); | |
541 | #endif | |
542 | return value; | |
543 | } | |
544 | ||
9680b9d0 | 545 | #endif /* 0 */ |
7840ced1 GM |
546 | |
547 | \f | |
548 | /*********************************************************************** | |
549 | RIFF-WAVE (*.wav) | |
550 | ***********************************************************************/ | |
551 | ||
d1299cde | 552 | /* Try to initialize sound file S from S->header. S->header |
7840ced1 GM |
553 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
554 | sound file. If the file is a WAV-format file, set up interface | |
d1299cde | 555 | functions in S and convert header fields to host byte-order. |
7840ced1 GM |
556 | Value is non-zero if the file is a WAV file. */ |
557 | ||
558 | static int | |
d1299cde GM |
559 | wav_init (s) |
560 | struct sound *s; | |
7840ced1 | 561 | { |
d1299cde GM |
562 | struct wav_header *header = (struct wav_header *) s->header; |
563 | ||
564 | if (s->header_size < sizeof *header | |
565 | || bcmp (s->header, "RIFF", 4) != 0) | |
7840ced1 GM |
566 | return 0; |
567 | ||
568 | /* WAV files are in little-endian order. Convert the header | |
569 | if on a big-endian machine. */ | |
570 | header->magic = le2hl (header->magic); | |
571 | header->length = le2hl (header->length); | |
572 | header->chunk_type = le2hl (header->chunk_type); | |
573 | header->chunk_format = le2hl (header->chunk_format); | |
574 | header->chunk_length = le2hl (header->chunk_length); | |
575 | header->format = le2hs (header->format); | |
576 | header->channels = le2hs (header->channels); | |
577 | header->sample_rate = le2hl (header->sample_rate); | |
578 | header->bytes_per_second = le2hl (header->bytes_per_second); | |
579 | header->sample_size = le2hs (header->sample_size); | |
580 | header->precision = le2hs (header->precision); | |
581 | header->chunk_data = le2hl (header->chunk_data); | |
582 | header->data_length = le2hl (header->data_length); | |
583 | ||
584 | /* Set up the interface functions for WAV. */ | |
d1299cde GM |
585 | s->type = RIFF; |
586 | s->play = wav_play; | |
7840ced1 GM |
587 | |
588 | return 1; | |
589 | } | |
590 | ||
591 | ||
d1299cde | 592 | /* Play RIFF-WAVE audio file S on sound device SD. */ |
7840ced1 GM |
593 | |
594 | static void | |
d1299cde GM |
595 | wav_play (s, sd) |
596 | struct sound *s; | |
7840ced1 GM |
597 | struct sound_device *sd; |
598 | { | |
d1299cde | 599 | struct wav_header *header = (struct wav_header *) s->header; |
7840ced1 GM |
600 | |
601 | /* Let the device choose a suitable device-dependent format | |
602 | for the file. */ | |
d1299cde | 603 | sd->choose_format (sd, s); |
7840ced1 GM |
604 | |
605 | /* Configure the device. */ | |
606 | sd->sample_size = header->sample_size; | |
607 | sd->sample_rate = header->sample_rate; | |
608 | sd->bps = header->bytes_per_second; | |
609 | sd->channels = header->channels; | |
610 | sd->configure (sd); | |
611 | ||
612 | /* Copy sound data to the device. The WAV file specification is | |
613 | actually more complex. This simple scheme worked with all WAV | |
614 | files I found so far. If someone feels inclined to implement the | |
615 | whole RIFF-WAVE spec, please do. */ | |
d1299cde GM |
616 | if (STRINGP (s->data)) |
617 | sd->write (sd, XSTRING (s->data)->data + sizeof *header, | |
618 | STRING_BYTES (XSTRING (s->data)) - sizeof *header); | |
619 | else | |
620 | { | |
621 | char *buffer; | |
622 | int nbytes; | |
623 | int blksize = 2048; | |
624 | ||
625 | buffer = (char *) alloca (blksize); | |
626 | lseek (s->fd, sizeof *header, SEEK_SET); | |
7840ced1 | 627 | |
d1299cde GM |
628 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) |
629 | sd->write (sd, buffer, nbytes); | |
7840ced1 | 630 | |
d1299cde GM |
631 | if (nbytes < 0) |
632 | sound_perror ("Reading sound file"); | |
633 | } | |
7840ced1 GM |
634 | } |
635 | ||
636 | ||
637 | \f | |
638 | /*********************************************************************** | |
639 | Sun Audio (*.au) | |
640 | ***********************************************************************/ | |
641 | ||
642 | /* Sun audio file encodings. */ | |
643 | ||
644 | enum au_encoding | |
645 | { | |
646 | AU_ENCODING_ULAW_8 = 1, | |
647 | AU_ENCODING_8, | |
648 | AU_ENCODING_16, | |
649 | AU_ENCODING_24, | |
650 | AU_ENCODING_32, | |
651 | AU_ENCODING_IEEE32, | |
652 | AU_ENCODING_IEEE64, | |
653 | AU_COMPRESSED = 23 | |
654 | }; | |
655 | ||
656 | ||
d1299cde | 657 | /* Try to initialize sound file S from S->header. S->header |
7840ced1 GM |
658 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
659 | sound file. If the file is a AU-format file, set up interface | |
d1299cde | 660 | functions in S and convert header fields to host byte-order. |
7840ced1 GM |
661 | Value is non-zero if the file is an AU file. */ |
662 | ||
663 | static int | |
d1299cde GM |
664 | au_init (s) |
665 | struct sound *s; | |
7840ced1 | 666 | { |
d1299cde | 667 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 | 668 | |
d1299cde GM |
669 | if (s->header_size < sizeof *header |
670 | || bcmp (s->header, ".snd", 4) != 0) | |
7840ced1 GM |
671 | return 0; |
672 | ||
673 | header->magic_number = be2hl (header->magic_number); | |
674 | header->data_offset = be2hl (header->data_offset); | |
675 | header->data_size = be2hl (header->data_size); | |
676 | header->encoding = be2hl (header->encoding); | |
677 | header->sample_rate = be2hl (header->sample_rate); | |
678 | header->channels = be2hl (header->channels); | |
679 | ||
680 | /* Set up the interface functions for AU. */ | |
d1299cde GM |
681 | s->type = SUN_AUDIO; |
682 | s->play = au_play; | |
7840ced1 GM |
683 | |
684 | return 1; | |
685 | } | |
686 | ||
687 | ||
d1299cde | 688 | /* Play Sun audio file S on sound device SD. */ |
7840ced1 GM |
689 | |
690 | static void | |
d1299cde GM |
691 | au_play (s, sd) |
692 | struct sound *s; | |
7840ced1 GM |
693 | struct sound_device *sd; |
694 | { | |
d1299cde | 695 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 GM |
696 | |
697 | sd->sample_size = 0; | |
698 | sd->sample_rate = header->sample_rate; | |
699 | sd->bps = 0; | |
700 | sd->channels = header->channels; | |
d1299cde | 701 | sd->choose_format (sd, s); |
7840ced1 | 702 | sd->configure (sd); |
d1299cde GM |
703 | |
704 | if (STRINGP (s->data)) | |
705 | sd->write (sd, XSTRING (s->data)->data + header->data_offset, | |
706 | STRING_BYTES (XSTRING (s->data)) - header->data_offset); | |
707 | else | |
708 | { | |
709 | int blksize = 2048; | |
710 | char *buffer; | |
711 | int nbytes; | |
7840ced1 | 712 | |
d1299cde GM |
713 | /* Seek */ |
714 | lseek (s->fd, header->data_offset, SEEK_SET); | |
7840ced1 | 715 | |
d1299cde GM |
716 | /* Copy sound data to the device. */ |
717 | buffer = (char *) alloca (blksize); | |
718 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) | |
719 | sd->write (sd, buffer, nbytes); | |
720 | ||
721 | if (nbytes < 0) | |
722 | sound_perror ("Reading sound file"); | |
723 | } | |
7840ced1 GM |
724 | } |
725 | ||
726 | ||
727 | \f | |
728 | /*********************************************************************** | |
729 | Voxware Driver Interface | |
730 | ***********************************************************************/ | |
731 | ||
732 | /* This driver is available on GNU/Linux, and the free BSDs. FreeBSD | |
733 | has a compatible own driver aka Luigi's driver. */ | |
734 | ||
735 | ||
736 | /* Open device SD. If SD->file is non-null, open that device, | |
737 | otherwise use a default device name. */ | |
738 | ||
739 | static void | |
740 | vox_open (sd) | |
741 | struct sound_device *sd; | |
742 | { | |
743 | char *file; | |
744 | ||
745 | /* Open the sound device. Default is /dev/dsp. */ | |
746 | if (sd->file) | |
747 | file = sd->file; | |
748 | else | |
80fcd514 | 749 | file = DEFAULT_SOUND_DEVICE; |
7840ced1 | 750 | |
68c45bf0 | 751 | sd->fd = emacs_open (file, O_WRONLY, 0); |
7840ced1 GM |
752 | if (sd->fd < 0) |
753 | sound_perror (file); | |
754 | } | |
755 | ||
756 | ||
757 | /* Configure device SD from parameters in it. */ | |
758 | ||
759 | static void | |
760 | vox_configure (sd) | |
761 | struct sound_device *sd; | |
762 | { | |
763 | int requested; | |
764 | ||
765 | xassert (sd->fd >= 0); | |
766 | ||
767 | /* Device parameters apparently depend on each other in undocumented | |
768 | ways (not to imply that there is any real documentation). Be | |
769 | careful when reordering the calls below. */ | |
770 | if (sd->sample_size > 0 | |
771 | && ioctl (sd->fd, SNDCTL_DSP_SAMPLESIZE, &sd->sample_size) < 0) | |
772 | sound_perror ("Setting sample size"); | |
773 | ||
774 | if (sd->bps > 0 | |
775 | && ioctl (sd->fd, SNDCTL_DSP_SPEED, &sd->bps) < 0) | |
776 | sound_perror ("Setting speed"); | |
777 | ||
778 | if (sd->sample_rate > 0 | |
779 | && ioctl (sd->fd, SOUND_PCM_WRITE_RATE, &sd->sample_rate) < 0) | |
780 | sound_perror ("Setting sample rate"); | |
781 | ||
782 | requested = sd->format; | |
783 | if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0) | |
784 | sound_perror ("Setting format"); | |
785 | else if (requested != sd->format) | |
786 | error ("Setting format"); | |
787 | ||
788 | if (sd->channels > 1 | |
789 | && ioctl (sd->fd, SNDCTL_DSP_STEREO, &sd->channels) < 0) | |
790 | sound_perror ("Setting channels"); | |
791 | ||
3887b449 GM |
792 | if (sd->volume > 0) |
793 | { | |
794 | int volume = sd->volume & 0xff; | |
795 | volume |= volume << 8; | |
796 | if (ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &volume) < 0) | |
797 | sound_perror ("Setting volume"); | |
798 | } | |
7840ced1 GM |
799 | } |
800 | ||
801 | ||
802 | /* Close device SD if it is open. */ | |
803 | ||
804 | static void | |
805 | vox_close (sd) | |
806 | struct sound_device *sd; | |
807 | { | |
808 | if (sd->fd >= 0) | |
809 | { | |
810 | /* Flush sound data, and reset the device. */ | |
811 | ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL); | |
812 | ioctl (sd->fd, SNDCTL_DSP_RESET, NULL); | |
813 | ||
814 | /* Close the device. */ | |
68c45bf0 | 815 | emacs_close (sd->fd); |
7840ced1 GM |
816 | sd->fd = -1; |
817 | } | |
818 | } | |
819 | ||
820 | ||
d1299cde | 821 | /* Choose device-dependent format for device SD from sound file S. */ |
7840ced1 GM |
822 | |
823 | static void | |
d1299cde | 824 | vox_choose_format (sd, s) |
7840ced1 | 825 | struct sound_device *sd; |
d1299cde | 826 | struct sound *s; |
7840ced1 | 827 | { |
d1299cde | 828 | if (s->type == RIFF) |
7840ced1 | 829 | { |
d1299cde | 830 | struct wav_header *h = (struct wav_header *) s->header; |
7840ced1 GM |
831 | if (h->precision == 8) |
832 | sd->format = AFMT_U8; | |
833 | else if (h->precision == 16) | |
834 | sd->format = AFMT_S16_LE; | |
835 | else | |
836 | error ("Unsupported WAV file format"); | |
837 | } | |
d1299cde | 838 | else if (s->type == SUN_AUDIO) |
7840ced1 | 839 | { |
d1299cde | 840 | struct au_header *header = (struct au_header *) s->header; |
7840ced1 GM |
841 | switch (header->encoding) |
842 | { | |
843 | case AU_ENCODING_ULAW_8: | |
844 | case AU_ENCODING_IEEE32: | |
845 | case AU_ENCODING_IEEE64: | |
846 | sd->format = AFMT_MU_LAW; | |
847 | break; | |
848 | ||
849 | case AU_ENCODING_8: | |
850 | case AU_ENCODING_16: | |
851 | case AU_ENCODING_24: | |
852 | case AU_ENCODING_32: | |
853 | sd->format = AFMT_S16_LE; | |
854 | break; | |
855 | ||
856 | default: | |
857 | error ("Unsupported AU file format"); | |
858 | } | |
859 | } | |
860 | else | |
861 | abort (); | |
862 | } | |
863 | ||
864 | ||
865 | /* Initialize device SD. Set up the interface functions in the device | |
866 | structure. */ | |
867 | ||
868 | static void | |
869 | vox_init (sd) | |
870 | struct sound_device *sd; | |
871 | { | |
872 | sd->fd = -1; | |
873 | sd->open = vox_open; | |
874 | sd->close = vox_close; | |
875 | sd->configure = vox_configure; | |
876 | sd->choose_format = vox_choose_format; | |
877 | sd->write = vox_write; | |
878 | } | |
879 | ||
880 | ||
881 | /* Write NBYTES bytes from BUFFER to device SD. */ | |
882 | ||
883 | static void | |
884 | vox_write (sd, buffer, nbytes) | |
885 | struct sound_device *sd; | |
886 | char *buffer; | |
887 | int nbytes; | |
888 | { | |
68c45bf0 | 889 | int nwritten = emacs_write (sd->fd, buffer, nbytes); |
7840ced1 GM |
890 | if (nwritten < 0) |
891 | sound_perror ("Writing to sound device"); | |
892 | } | |
893 | ||
894 | ||
895 | \f | |
896 | /*********************************************************************** | |
897 | Initialization | |
898 | ***********************************************************************/ | |
899 | ||
900 | void | |
901 | syms_of_sound () | |
902 | { | |
903 | QCdevice = intern (":device"); | |
904 | staticpro (&QCdevice); | |
905 | QCvolume = intern (":volume"); | |
906 | staticpro (&QCvolume); | |
907 | Qsound = intern ("sound"); | |
908 | staticpro (&Qsound); | |
2a53558d GM |
909 | Qplay_sound_functions = intern ("play-sound-functions"); |
910 | staticpro (&Qplay_sound_functions); | |
7840ced1 GM |
911 | |
912 | defsubr (&Splay_sound); | |
913 | } | |
914 | ||
915 | ||
916 | void | |
917 | init_sound () | |
918 | { | |
919 | } | |
920 | ||
921 | #endif /* HAVE_SOUND */ |