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7840ced1 GM |
1 | /* sound.c -- sound support. |
2 | Copyright (C) 1998 Free Software Foundation. | |
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 | ||
51 | struct sound_file; | |
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 | ||
149 | /* Choose a device-dependent format for outputting sound file SF. */ | |
150 | void (* choose_format) P_ ((struct sound_device *sd, | |
151 | struct sound_file *sf)); | |
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 | ||
170 | struct sound_file | |
171 | { | |
172 | /* The type of the file. */ | |
173 | enum sound_type type; | |
174 | ||
175 | /* File descriptor of the file. */ | |
176 | int fd; | |
177 | ||
178 | /* Pointer to sound file header. This contains the first | |
179 | MAX_SOUND_HEADER_BYTES read from the file. */ | |
180 | char *header; | |
181 | ||
182 | /* Play sound file SF on device SD. */ | |
183 | void (* play) P_ ((struct sound_file *sf, struct sound_device *sd)); | |
184 | }; | |
185 | ||
186 | /* Indices of attributes in a sound attributes vector. */ | |
187 | ||
188 | enum sound_attr | |
189 | { | |
190 | SOUND_FILE, | |
191 | SOUND_DEVICE, | |
192 | SOUND_VOLUME, | |
193 | SOUND_ATTR_SENTINEL | |
194 | }; | |
195 | ||
196 | /* Symbols. */ | |
197 | ||
198 | extern Lisp_Object QCfile; | |
199 | Lisp_Object QCvolume, QCdevice; | |
200 | Lisp_Object Qsound; | |
2a53558d | 201 | Lisp_Object Qplay_sound_functions; |
7840ced1 GM |
202 | |
203 | /* These are set during `play-sound' so that sound_cleanup has | |
204 | access to them. */ | |
205 | ||
206 | struct sound_device *sound_device; | |
207 | struct sound_file *sound_file; | |
208 | ||
209 | /* Function prototypes. */ | |
210 | ||
211 | static void vox_open P_ ((struct sound_device *)); | |
212 | static void vox_configure P_ ((struct sound_device *)); | |
213 | static void vox_close P_ ((struct sound_device *sd)); | |
214 | static void vox_choose_format P_ ((struct sound_device *, struct sound_file *)); | |
215 | static void vox_init P_ ((struct sound_device *)); | |
216 | static void vox_write P_ ((struct sound_device *, char *, int)); | |
217 | static void sound_perror P_ ((char *)); | |
218 | static int parse_sound P_ ((Lisp_Object, Lisp_Object *)); | |
219 | static void find_sound_file_type P_ ((struct sound_file *)); | |
220 | static u_int32_t le2hl P_ ((u_int32_t)); | |
221 | static u_int16_t le2hs P_ ((u_int16_t)); | |
222 | static u_int32_t be2hl P_ ((u_int32_t)); | |
223 | static u_int16_t be2hs P_ ((u_int16_t)); | |
224 | static int wav_init P_ ((struct sound_file *)); | |
225 | static void wav_play P_ ((struct sound_file *, struct sound_device *)); | |
226 | static int au_init P_ ((struct sound_file *)); | |
227 | static void au_play P_ ((struct sound_file *, struct sound_device *)); | |
228 | ||
229 | ||
230 | \f | |
231 | /*********************************************************************** | |
232 | General | |
233 | ***********************************************************************/ | |
234 | ||
235 | /* Like perror, but signals an error. */ | |
236 | ||
237 | static void | |
238 | sound_perror (msg) | |
239 | char *msg; | |
240 | { | |
241 | error ("%s: %s", msg, strerror (errno)); | |
242 | } | |
243 | ||
244 | ||
245 | /* Parse sound specification SOUND, and fill ATTRS with what is | |
246 | found. Value is non-zero if SOUND Is a valid sound specification. | |
247 | A valid sound specification is a list starting with the symbol | |
248 | `sound'. The rest of the list is a property list which may | |
249 | contain the following key/value pairs: | |
250 | ||
251 | - `:file FILE' | |
252 | ||
253 | FILE is the sound file to play. If it isn't an absolute name, | |
254 | it's searched under `data-directory'. | |
255 | ||
256 | - `:device DEVICE' | |
257 | ||
258 | DEVICE is the name of the device to play on, e.g. "/dev/dsp2". | |
259 | If not specified, a default device is used. | |
260 | ||
261 | - `:volume VOL' | |
262 | ||
2a53558d GM |
263 | VOL must be an integer in the range [0, 100], or a float in the |
264 | range [0, 1]. */ | |
7840ced1 GM |
265 | |
266 | static int | |
267 | parse_sound (sound, attrs) | |
268 | Lisp_Object sound; | |
269 | Lisp_Object *attrs; | |
270 | { | |
271 | /* SOUND must be a list starting with the symbol `sound'. */ | |
272 | if (!CONSP (sound) || !EQ (XCAR (sound), Qsound)) | |
273 | return 0; | |
274 | ||
275 | sound = XCDR (sound); | |
276 | attrs[SOUND_FILE] = Fplist_get (sound, QCfile); | |
277 | attrs[SOUND_DEVICE] = Fplist_get (sound, QCdevice); | |
278 | attrs[SOUND_VOLUME] = Fplist_get (sound, QCvolume); | |
279 | ||
280 | /* File name must be specified. */ | |
281 | if (!STRINGP (attrs[SOUND_FILE])) | |
282 | return 0; | |
283 | ||
284 | /* Volume must be in the range 0..100 or unspecified. */ | |
285 | if (!NILP (attrs[SOUND_VOLUME])) | |
286 | { | |
2a53558d GM |
287 | if (INTEGERP (attrs[SOUND_VOLUME])) |
288 | { | |
289 | if (XINT (attrs[SOUND_VOLUME]) < 0 | |
290 | || XINT (attrs[SOUND_VOLUME]) > 100) | |
291 | return 0; | |
292 | } | |
293 | else if (FLOATP (attrs[SOUND_VOLUME])) | |
294 | { | |
295 | if (XFLOAT_DATA (attrs[SOUND_VOLUME]) < 0 | |
296 | || XFLOAT_DATA (attrs[SOUND_VOLUME]) > 1) | |
297 | return 0; | |
298 | } | |
299 | else | |
7840ced1 GM |
300 | return 0; |
301 | } | |
302 | ||
303 | /* Device must be a string or unspecified. */ | |
304 | if (!NILP (attrs[SOUND_DEVICE]) | |
305 | && !STRINGP (attrs[SOUND_DEVICE])) | |
306 | return 0; | |
307 | ||
308 | return 1; | |
309 | } | |
310 | ||
311 | ||
312 | /* Find out the type of the sound file whose file descriptor is FD. | |
313 | SF is the sound file structure to fill in. */ | |
314 | ||
315 | static void | |
316 | find_sound_file_type (sf) | |
317 | struct sound_file *sf; | |
318 | { | |
319 | if (!wav_init (sf) | |
320 | && !au_init (sf)) | |
321 | error ("Unknown sound file format"); | |
322 | } | |
323 | ||
324 | ||
325 | /* Function installed by play-sound with record_unwind_protect. */ | |
326 | ||
327 | static Lisp_Object | |
328 | sound_cleanup (arg) | |
329 | Lisp_Object arg; | |
330 | { | |
331 | if (sound_device) | |
332 | { | |
333 | sound_device->close (sound_device); | |
334 | if (sound_file->fd > 0) | |
335 | close (sound_file->fd); | |
336 | } | |
337 | } | |
338 | ||
339 | ||
340 | DEFUN ("play-sound", Fplay_sound, Splay_sound, 1, 1, 0, | |
341 | "Play sound SOUND.") | |
342 | (sound) | |
343 | Lisp_Object sound; | |
344 | { | |
345 | Lisp_Object attrs[SOUND_ATTR_SENTINEL]; | |
346 | char *header; | |
347 | Lisp_Object file; | |
348 | struct gcpro gcpro1, gcpro2; | |
349 | int nbytes; | |
350 | char *msg; | |
351 | struct sound_device sd; | |
352 | struct sound_file sf; | |
353 | Lisp_Object args[2]; | |
354 | int count = specpdl_ptr - specpdl; | |
355 | ||
356 | file = Qnil; | |
357 | GCPRO2 (sound, file); | |
358 | bzero (&sd, sizeof sd); | |
359 | bzero (&sf, sizeof sf); | |
360 | sf.header = (char *) alloca (MAX_SOUND_HEADER_BYTES); | |
361 | ||
362 | sound_device = &sd; | |
363 | sound_file = &sf; | |
364 | record_unwind_protect (sound_cleanup, Qnil); | |
365 | ||
366 | /* Parse the sound specification. Give up if it is invalid. */ | |
367 | if (!parse_sound (sound, attrs)) | |
368 | { | |
369 | UNGCPRO; | |
370 | error ("Invalid sound specification"); | |
371 | } | |
372 | ||
373 | /* Open the sound file. */ | |
374 | sf.fd = openp (Fcons (Vdata_directory, Qnil), | |
375 | attrs[SOUND_FILE], "", &file, 0); | |
376 | if (sf.fd < 0) | |
377 | sound_perror ("Open sound file"); | |
378 | ||
379 | /* Read the first bytes from the file. */ | |
380 | nbytes = read (sf.fd, sf.header, MAX_SOUND_HEADER_BYTES); | |
381 | if (nbytes < 0) | |
382 | sound_perror ("Reading sound file header"); | |
383 | ||
384 | /* Find out the type of sound file. Give up if we can't tell. */ | |
385 | find_sound_file_type (&sf); | |
386 | ||
387 | /* Set up a device. */ | |
388 | if (STRINGP (attrs[SOUND_DEVICE])) | |
389 | { | |
390 | int len = XSTRING (attrs[SOUND_DEVICE])->size; | |
391 | sd.file = (char *) alloca (len + 1); | |
392 | strcpy (sd.file, XSTRING (attrs[SOUND_DEVICE])->data); | |
393 | } | |
394 | if (INTEGERP (attrs[SOUND_VOLUME])) | |
395 | sd.volume = XFASTINT (attrs[SOUND_VOLUME]); | |
2a53558d GM |
396 | else if (FLOATP (attrs[SOUND_VOLUME])) |
397 | sd.volume = XFLOAT_DATA (attrs[SOUND_VOLUME]) * 100; | |
7840ced1 | 398 | |
2a53558d | 399 | args[0] = Qplay_sound_functions; |
7840ced1 GM |
400 | args[1] = sound; |
401 | Frun_hook_with_args (make_number (2), args); | |
402 | ||
403 | vox_init (&sd); | |
404 | sd.open (&sd); | |
405 | ||
406 | sf.play (&sf, &sd); | |
407 | close (sf.fd); | |
408 | sf.fd = -1; | |
409 | sd.close (&sd); | |
410 | sound_device = NULL; | |
411 | sound_file = NULL; | |
412 | UNGCPRO; | |
413 | unbind_to (count, Qnil); | |
414 | return Qnil; | |
415 | } | |
416 | ||
417 | \f | |
418 | /*********************************************************************** | |
419 | Byte-order Conversion | |
420 | ***********************************************************************/ | |
421 | ||
422 | /* Convert 32-bit value VALUE which is in little-endian byte-order | |
423 | to host byte-order. */ | |
424 | ||
425 | static u_int32_t | |
426 | le2hl (value) | |
427 | u_int32_t value; | |
428 | { | |
429 | #ifdef WORDS_BIG_ENDIAN | |
430 | unsigned char *p = (unsigned char *) &value; | |
431 | value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24); | |
432 | #endif | |
433 | return value; | |
434 | } | |
435 | ||
436 | ||
437 | /* Convert 16-bit value VALUE which is in little-endian byte-order | |
438 | to host byte-order. */ | |
439 | ||
440 | static u_int16_t | |
441 | le2hs (value) | |
442 | u_int16_t value; | |
443 | { | |
444 | #ifdef WORDS_BIG_ENDIAN | |
445 | unsigned char *p = (unsigned char *) &value; | |
446 | value = p[0] + (p[1] << 8); | |
447 | #endif | |
448 | return value; | |
449 | } | |
450 | ||
451 | ||
452 | /* Convert 32-bit value VALUE which is in big-endian byte-order | |
453 | to host byte-order. */ | |
454 | ||
455 | static u_int32_t | |
456 | be2hl (value) | |
457 | u_int32_t value; | |
458 | { | |
459 | #ifndef WORDS_BIG_ENDIAN | |
460 | unsigned char *p = (unsigned char *) &value; | |
461 | value = p[3] + (p[2] << 8) + (p[1] << 16) + (p[0] << 24); | |
462 | #endif | |
463 | return value; | |
464 | } | |
465 | ||
466 | ||
467 | /* Convert 16-bit value VALUE which is in big-endian byte-order | |
468 | to host byte-order. */ | |
469 | ||
470 | static u_int16_t | |
471 | be2hs (value) | |
472 | u_int16_t value; | |
473 | { | |
474 | #ifndef WORDS_BIG_ENDIAN | |
475 | unsigned char *p = (unsigned char *) &value; | |
476 | value = p[1] + (p[0] << 8); | |
477 | #endif | |
478 | return value; | |
479 | } | |
480 | ||
481 | ||
482 | \f | |
483 | /*********************************************************************** | |
484 | RIFF-WAVE (*.wav) | |
485 | ***********************************************************************/ | |
486 | ||
487 | /* Try to initialize sound file SF from SF->header. SF->header | |
488 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the | |
489 | sound file. If the file is a WAV-format file, set up interface | |
490 | functions in SF and convert header fields to host byte-order. | |
491 | Value is non-zero if the file is a WAV file. */ | |
492 | ||
493 | static int | |
494 | wav_init (sf) | |
495 | struct sound_file *sf; | |
496 | { | |
497 | struct wav_header *header = (struct wav_header *) sf->header; | |
498 | ||
499 | if (bcmp (sf->header, "RIFF", 4) != 0) | |
500 | return 0; | |
501 | ||
502 | /* WAV files are in little-endian order. Convert the header | |
503 | if on a big-endian machine. */ | |
504 | header->magic = le2hl (header->magic); | |
505 | header->length = le2hl (header->length); | |
506 | header->chunk_type = le2hl (header->chunk_type); | |
507 | header->chunk_format = le2hl (header->chunk_format); | |
508 | header->chunk_length = le2hl (header->chunk_length); | |
509 | header->format = le2hs (header->format); | |
510 | header->channels = le2hs (header->channels); | |
511 | header->sample_rate = le2hl (header->sample_rate); | |
512 | header->bytes_per_second = le2hl (header->bytes_per_second); | |
513 | header->sample_size = le2hs (header->sample_size); | |
514 | header->precision = le2hs (header->precision); | |
515 | header->chunk_data = le2hl (header->chunk_data); | |
516 | header->data_length = le2hl (header->data_length); | |
517 | ||
518 | /* Set up the interface functions for WAV. */ | |
519 | sf->type = RIFF; | |
520 | sf->play = wav_play; | |
521 | ||
522 | return 1; | |
523 | } | |
524 | ||
525 | ||
526 | /* Play RIFF-WAVE audio file SF on sound device SD. */ | |
527 | ||
528 | static void | |
529 | wav_play (sf, sd) | |
530 | struct sound_file *sf; | |
531 | struct sound_device *sd; | |
532 | { | |
533 | struct wav_header *header = (struct wav_header *) sf->header; | |
534 | char *buffer; | |
535 | int nbytes; | |
536 | int blksize = 2048; | |
537 | ||
538 | /* Let the device choose a suitable device-dependent format | |
539 | for the file. */ | |
540 | sd->choose_format (sd, sf); | |
541 | ||
542 | /* Configure the device. */ | |
543 | sd->sample_size = header->sample_size; | |
544 | sd->sample_rate = header->sample_rate; | |
545 | sd->bps = header->bytes_per_second; | |
546 | sd->channels = header->channels; | |
547 | sd->configure (sd); | |
548 | ||
549 | /* Copy sound data to the device. The WAV file specification is | |
550 | actually more complex. This simple scheme worked with all WAV | |
551 | files I found so far. If someone feels inclined to implement the | |
552 | whole RIFF-WAVE spec, please do. */ | |
553 | buffer = (char *) alloca (blksize); | |
554 | lseek (sf->fd, sizeof *header, SEEK_SET); | |
555 | ||
556 | while ((nbytes = read (sf->fd, buffer, blksize)) > 0) | |
557 | sd->write (sd, buffer, nbytes); | |
558 | ||
559 | if (nbytes < 0) | |
560 | sound_perror ("Reading sound file"); | |
561 | } | |
562 | ||
563 | ||
564 | \f | |
565 | /*********************************************************************** | |
566 | Sun Audio (*.au) | |
567 | ***********************************************************************/ | |
568 | ||
569 | /* Sun audio file encodings. */ | |
570 | ||
571 | enum au_encoding | |
572 | { | |
573 | AU_ENCODING_ULAW_8 = 1, | |
574 | AU_ENCODING_8, | |
575 | AU_ENCODING_16, | |
576 | AU_ENCODING_24, | |
577 | AU_ENCODING_32, | |
578 | AU_ENCODING_IEEE32, | |
579 | AU_ENCODING_IEEE64, | |
580 | AU_COMPRESSED = 23 | |
581 | }; | |
582 | ||
583 | ||
584 | /* Try to initialize sound file SF from SF->header. SF->header | |
585 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the | |
586 | sound file. If the file is a AU-format file, set up interface | |
587 | functions in SF and convert header fields to host byte-order. | |
588 | Value is non-zero if the file is an AU file. */ | |
589 | ||
590 | static int | |
591 | au_init (sf) | |
592 | struct sound_file *sf; | |
593 | { | |
594 | struct au_header *header = (struct au_header *) sf->header; | |
595 | ||
596 | if (bcmp (sf->header, ".snd", 4) != 0) | |
597 | return 0; | |
598 | ||
599 | header->magic_number = be2hl (header->magic_number); | |
600 | header->data_offset = be2hl (header->data_offset); | |
601 | header->data_size = be2hl (header->data_size); | |
602 | header->encoding = be2hl (header->encoding); | |
603 | header->sample_rate = be2hl (header->sample_rate); | |
604 | header->channels = be2hl (header->channels); | |
605 | ||
606 | /* Set up the interface functions for AU. */ | |
607 | sf->type = SUN_AUDIO; | |
608 | sf->play = au_play; | |
609 | ||
610 | return 1; | |
611 | } | |
612 | ||
613 | ||
614 | /* Play Sun audio file SF on sound device SD. */ | |
615 | ||
616 | static void | |
617 | au_play (sf, sd) | |
618 | struct sound_file *sf; | |
619 | struct sound_device *sd; | |
620 | { | |
621 | struct au_header *header = (struct au_header *) sf->header; | |
622 | int blksize = 2048; | |
623 | char *buffer; | |
624 | int nbytes; | |
625 | ||
626 | sd->sample_size = 0; | |
627 | sd->sample_rate = header->sample_rate; | |
628 | sd->bps = 0; | |
629 | sd->channels = header->channels; | |
630 | sd->choose_format (sd, sf); | |
631 | sd->configure (sd); | |
632 | ||
633 | /* Seek */ | |
634 | lseek (sf->fd, header->data_offset, SEEK_SET); | |
635 | ||
636 | /* Copy sound data to the device. */ | |
637 | buffer = (char *) alloca (blksize); | |
638 | while ((nbytes = read (sf->fd, buffer, blksize)) > 0) | |
639 | sd->write (sd, buffer, nbytes); | |
640 | ||
641 | if (nbytes < 0) | |
642 | sound_perror ("Reading sound file"); | |
643 | } | |
644 | ||
645 | ||
646 | \f | |
647 | /*********************************************************************** | |
648 | Voxware Driver Interface | |
649 | ***********************************************************************/ | |
650 | ||
651 | /* This driver is available on GNU/Linux, and the free BSDs. FreeBSD | |
652 | has a compatible own driver aka Luigi's driver. */ | |
653 | ||
654 | ||
655 | /* Open device SD. If SD->file is non-null, open that device, | |
656 | otherwise use a default device name. */ | |
657 | ||
658 | static void | |
659 | vox_open (sd) | |
660 | struct sound_device *sd; | |
661 | { | |
662 | char *file; | |
663 | ||
664 | /* Open the sound device. Default is /dev/dsp. */ | |
665 | if (sd->file) | |
666 | file = sd->file; | |
667 | else | |
668 | file = "/dev/dsp"; | |
669 | ||
670 | sd->fd = open (file, O_WRONLY); | |
671 | if (sd->fd < 0) | |
672 | sound_perror (file); | |
673 | } | |
674 | ||
675 | ||
676 | /* Configure device SD from parameters in it. */ | |
677 | ||
678 | static void | |
679 | vox_configure (sd) | |
680 | struct sound_device *sd; | |
681 | { | |
682 | int requested; | |
683 | ||
684 | xassert (sd->fd >= 0); | |
685 | ||
686 | /* Device parameters apparently depend on each other in undocumented | |
687 | ways (not to imply that there is any real documentation). Be | |
688 | careful when reordering the calls below. */ | |
689 | if (sd->sample_size > 0 | |
690 | && ioctl (sd->fd, SNDCTL_DSP_SAMPLESIZE, &sd->sample_size) < 0) | |
691 | sound_perror ("Setting sample size"); | |
692 | ||
693 | if (sd->bps > 0 | |
694 | && ioctl (sd->fd, SNDCTL_DSP_SPEED, &sd->bps) < 0) | |
695 | sound_perror ("Setting speed"); | |
696 | ||
697 | if (sd->sample_rate > 0 | |
698 | && ioctl (sd->fd, SOUND_PCM_WRITE_RATE, &sd->sample_rate) < 0) | |
699 | sound_perror ("Setting sample rate"); | |
700 | ||
701 | requested = sd->format; | |
702 | if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0) | |
703 | sound_perror ("Setting format"); | |
704 | else if (requested != sd->format) | |
705 | error ("Setting format"); | |
706 | ||
707 | if (sd->channels > 1 | |
708 | && ioctl (sd->fd, SNDCTL_DSP_STEREO, &sd->channels) < 0) | |
709 | sound_perror ("Setting channels"); | |
710 | ||
711 | if (sd->volume > 0 | |
712 | && ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &sd->volume) < 0) | |
713 | sound_perror ("Setting volume"); | |
714 | } | |
715 | ||
716 | ||
717 | /* Close device SD if it is open. */ | |
718 | ||
719 | static void | |
720 | vox_close (sd) | |
721 | struct sound_device *sd; | |
722 | { | |
723 | if (sd->fd >= 0) | |
724 | { | |
725 | /* Flush sound data, and reset the device. */ | |
726 | ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL); | |
727 | ioctl (sd->fd, SNDCTL_DSP_RESET, NULL); | |
728 | ||
729 | /* Close the device. */ | |
730 | close (sd->fd); | |
731 | sd->fd = -1; | |
732 | } | |
733 | } | |
734 | ||
735 | ||
736 | /* Choose device-dependent format for device SD from sound file SF. */ | |
737 | ||
738 | static void | |
739 | vox_choose_format (sd, sf) | |
740 | struct sound_device *sd; | |
741 | struct sound_file *sf; | |
742 | { | |
743 | if (sf->type == RIFF) | |
744 | { | |
745 | struct wav_header *h = (struct wav_header *) sf->header; | |
746 | if (h->precision == 8) | |
747 | sd->format = AFMT_U8; | |
748 | else if (h->precision == 16) | |
749 | sd->format = AFMT_S16_LE; | |
750 | else | |
751 | error ("Unsupported WAV file format"); | |
752 | } | |
753 | else if (sf->type == SUN_AUDIO) | |
754 | { | |
755 | struct au_header *header = (struct au_header *) sf->header; | |
756 | switch (header->encoding) | |
757 | { | |
758 | case AU_ENCODING_ULAW_8: | |
759 | case AU_ENCODING_IEEE32: | |
760 | case AU_ENCODING_IEEE64: | |
761 | sd->format = AFMT_MU_LAW; | |
762 | break; | |
763 | ||
764 | case AU_ENCODING_8: | |
765 | case AU_ENCODING_16: | |
766 | case AU_ENCODING_24: | |
767 | case AU_ENCODING_32: | |
768 | sd->format = AFMT_S16_LE; | |
769 | break; | |
770 | ||
771 | default: | |
772 | error ("Unsupported AU file format"); | |
773 | } | |
774 | } | |
775 | else | |
776 | abort (); | |
777 | } | |
778 | ||
779 | ||
780 | /* Initialize device SD. Set up the interface functions in the device | |
781 | structure. */ | |
782 | ||
783 | static void | |
784 | vox_init (sd) | |
785 | struct sound_device *sd; | |
786 | { | |
787 | sd->fd = -1; | |
788 | sd->open = vox_open; | |
789 | sd->close = vox_close; | |
790 | sd->configure = vox_configure; | |
791 | sd->choose_format = vox_choose_format; | |
792 | sd->write = vox_write; | |
793 | } | |
794 | ||
795 | ||
796 | /* Write NBYTES bytes from BUFFER to device SD. */ | |
797 | ||
798 | static void | |
799 | vox_write (sd, buffer, nbytes) | |
800 | struct sound_device *sd; | |
801 | char *buffer; | |
802 | int nbytes; | |
803 | { | |
804 | int nwritten = write (sd->fd, buffer, nbytes); | |
805 | if (nwritten < 0) | |
806 | sound_perror ("Writing to sound device"); | |
807 | } | |
808 | ||
809 | ||
810 | \f | |
811 | /*********************************************************************** | |
812 | Initialization | |
813 | ***********************************************************************/ | |
814 | ||
815 | void | |
816 | syms_of_sound () | |
817 | { | |
818 | QCdevice = intern (":device"); | |
819 | staticpro (&QCdevice); | |
820 | QCvolume = intern (":volume"); | |
821 | staticpro (&QCvolume); | |
822 | Qsound = intern ("sound"); | |
823 | staticpro (&Qsound); | |
2a53558d GM |
824 | Qplay_sound_functions = intern ("play-sound-functions"); |
825 | staticpro (&Qplay_sound_functions); | |
7840ced1 GM |
826 | |
827 | defsubr (&Splay_sound); | |
828 | } | |
829 | ||
830 | ||
831 | void | |
832 | init_sound () | |
833 | { | |
834 | } | |
835 | ||
836 | #endif /* HAVE_SOUND */ |