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