| 1 | /* sound.c -- sound support. |
| 2 | Copyright (C) 1998, 1999 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 | #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 |
| 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 | |
| 59 | struct sound; |
| 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 | |
| 157 | /* Choose a device-dependent format for outputting sound S. */ |
| 158 | void (* choose_format) P_ ((struct sound_device *sd, |
| 159 | struct sound *s)); |
| 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 | |
| 178 | struct sound |
| 179 | { |
| 180 | /* The type of the file. */ |
| 181 | enum sound_type type; |
| 182 | |
| 183 | /* File descriptor of a sound file. */ |
| 184 | int fd; |
| 185 | |
| 186 | /* Pointer to sound file header. This contains header_size bytes |
| 187 | read from the start of a sound file. */ |
| 188 | char *header; |
| 189 | |
| 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)); |
| 199 | }; |
| 200 | |
| 201 | /* Indices of attributes in a sound attributes vector. */ |
| 202 | |
| 203 | enum sound_attr |
| 204 | { |
| 205 | SOUND_FILE, |
| 206 | SOUND_DATA, |
| 207 | SOUND_DEVICE, |
| 208 | SOUND_VOLUME, |
| 209 | SOUND_ATTR_SENTINEL |
| 210 | }; |
| 211 | |
| 212 | /* Symbols. */ |
| 213 | |
| 214 | extern Lisp_Object QCfile, QCdata; |
| 215 | Lisp_Object QCvolume, QCdevice; |
| 216 | Lisp_Object Qsound; |
| 217 | Lisp_Object Qplay_sound_functions; |
| 218 | |
| 219 | /* These are set during `play-sound' so that sound_cleanup has |
| 220 | access to them. */ |
| 221 | |
| 222 | struct sound_device *current_sound_device; |
| 223 | struct sound *current_sound; |
| 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)); |
| 230 | static void vox_choose_format P_ ((struct sound_device *, struct sound *)); |
| 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 *)); |
| 235 | static void find_sound_type P_ ((struct sound *)); |
| 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)); |
| 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 *)); |
| 243 | |
| 244 | #if 0 /* Currently not used. */ |
| 245 | static u_int16_t be2hs P_ ((u_int16_t)); |
| 246 | #endif |
| 247 | |
| 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 | |
| 275 | - `:data DATA' |
| 276 | |
| 277 | DATA is a string containing sound data. Either :file or :data |
| 278 | may be present, but not both. |
| 279 | |
| 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 | |
| 287 | VOL must be an integer in the range [0, 100], or a float in the |
| 288 | range [0, 1]. */ |
| 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); |
| 301 | attrs[SOUND_DATA] = Fplist_get (sound, QCdata); |
| 302 | attrs[SOUND_DEVICE] = Fplist_get (sound, QCdevice); |
| 303 | attrs[SOUND_VOLUME] = Fplist_get (sound, QCvolume); |
| 304 | |
| 305 | /* File name or data must be specified. */ |
| 306 | if (!STRINGP (attrs[SOUND_FILE]) |
| 307 | && !STRINGP (attrs[SOUND_DATA])) |
| 308 | return 0; |
| 309 | |
| 310 | /* Volume must be in the range 0..100 or unspecified. */ |
| 311 | if (!NILP (attrs[SOUND_VOLUME])) |
| 312 | { |
| 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 |
| 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. |
| 339 | S is the sound file structure to fill in. */ |
| 340 | |
| 341 | static void |
| 342 | find_sound_type (s) |
| 343 | struct sound *s; |
| 344 | { |
| 345 | if (!wav_init (s) && !au_init (s)) |
| 346 | error ("Unknown sound format"); |
| 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 | { |
| 356 | if (current_sound_device) |
| 357 | { |
| 358 | if (current_sound_device->close) |
| 359 | current_sound_device->close (current_sound_device); |
| 360 | if (current_sound->fd > 0) |
| 361 | emacs_close (current_sound->fd); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | |
| 366 | DEFUN ("play-sound", Fplay_sound, Splay_sound, 1, 1, 0, |
| 367 | "Play sound SOUND.\n\ |
| 368 | SOUND is a list of the form `(sound KEYWORD VALUE...)'.\n\ |
| 369 | The following keywords are recognized:\n\ |
| 370 | \n\ |
| 371 | :file FILE.- read sound data from FILE. If FILE Isn't an\n\ |
| 372 | absolute file name, it is searched in `data-directory'.\n\ |
| 373 | \n\ |
| 374 | :data DATA - read sound data from string DATA.\n\ |
| 375 | \n\ |
| 376 | Exactly one of :file or :data must be present.\n\ |
| 377 | \n\ |
| 378 | :volume VOL - set volume to VOL. VOL must an integer in the\n\ |
| 379 | range 0..100 or a float in the range 0..1.0. If not specified,\n\ |
| 380 | don't change the volume setting of the sound device.\n\ |
| 381 | \n\ |
| 382 | :device DEVICE - play sound on DEVICE. If not specified,\n\ |
| 383 | a system-dependent default device name is used.") |
| 384 | (sound) |
| 385 | Lisp_Object sound; |
| 386 | { |
| 387 | Lisp_Object attrs[SOUND_ATTR_SENTINEL]; |
| 388 | Lisp_Object file; |
| 389 | struct gcpro gcpro1, gcpro2; |
| 390 | struct sound_device sd; |
| 391 | struct sound s; |
| 392 | Lisp_Object args[2]; |
| 393 | int count = specpdl_ptr - specpdl; |
| 394 | |
| 395 | file = Qnil; |
| 396 | GCPRO2 (sound, file); |
| 397 | bzero (&sd, sizeof sd); |
| 398 | bzero (&s, sizeof s); |
| 399 | current_sound_device = &sd; |
| 400 | current_sound = &s; |
| 401 | record_unwind_protect (sound_cleanup, Qnil); |
| 402 | s.header = (char *) alloca (MAX_SOUND_HEADER_BYTES); |
| 403 | |
| 404 | /* Parse the sound specification. Give up if it is invalid. */ |
| 405 | if (!parse_sound (sound, attrs)) |
| 406 | error ("Invalid sound specification"); |
| 407 | |
| 408 | if (STRINGP (attrs[SOUND_FILE])) |
| 409 | { |
| 410 | /* Open the sound file. */ |
| 411 | s.fd = openp (Fcons (Vdata_directory, Qnil), |
| 412 | attrs[SOUND_FILE], "", &file, 0); |
| 413 | if (s.fd < 0) |
| 414 | sound_perror ("Open sound file"); |
| 415 | |
| 416 | /* Read the first bytes from the file. */ |
| 417 | s.header_size = emacs_read (s.fd, s.header, MAX_SOUND_HEADER_BYTES); |
| 418 | if (s.header_size < 0) |
| 419 | sound_perror ("Reading sound file header"); |
| 420 | } |
| 421 | else |
| 422 | { |
| 423 | s.data = attrs[SOUND_DATA]; |
| 424 | bcopy (XSTRING (s.data)->data, s.header, |
| 425 | min (MAX_SOUND_HEADER_BYTES, STRING_BYTES (XSTRING (s.data)))); |
| 426 | } |
| 427 | |
| 428 | /* Find out the type of sound. Give up if we can't tell. */ |
| 429 | find_sound_type (&s); |
| 430 | |
| 431 | /* Set up a device. */ |
| 432 | if (STRINGP (attrs[SOUND_DEVICE])) |
| 433 | { |
| 434 | int len = XSTRING (attrs[SOUND_DEVICE])->size; |
| 435 | sd.file = (char *) alloca (len + 1); |
| 436 | strcpy (sd.file, XSTRING (attrs[SOUND_DEVICE])->data); |
| 437 | } |
| 438 | |
| 439 | if (INTEGERP (attrs[SOUND_VOLUME])) |
| 440 | sd.volume = XFASTINT (attrs[SOUND_VOLUME]); |
| 441 | else if (FLOATP (attrs[SOUND_VOLUME])) |
| 442 | sd.volume = XFLOAT_DATA (attrs[SOUND_VOLUME]) * 100; |
| 443 | |
| 444 | args[0] = Qplay_sound_functions; |
| 445 | args[1] = sound; |
| 446 | Frun_hook_with_args (2, args); |
| 447 | |
| 448 | /* There is only one type of device we currently support, the VOX |
| 449 | sound driver. Set up the device interface functions for that |
| 450 | device. */ |
| 451 | vox_init (&sd); |
| 452 | |
| 453 | /* Open the device. */ |
| 454 | sd.open (&sd); |
| 455 | |
| 456 | /* Play the sound. */ |
| 457 | s.play (&s, &sd); |
| 458 | |
| 459 | /* Close the input file, if any. */ |
| 460 | if (!STRINGP (s.data)) |
| 461 | { |
| 462 | emacs_close (s.fd); |
| 463 | s.fd = -1; |
| 464 | } |
| 465 | |
| 466 | /* Close the device. */ |
| 467 | sd.close (&sd); |
| 468 | |
| 469 | /* Clean up. */ |
| 470 | current_sound_device = NULL; |
| 471 | current_sound = NULL; |
| 472 | UNGCPRO; |
| 473 | unbind_to (count, Qnil); |
| 474 | return Qnil; |
| 475 | } |
| 476 | |
| 477 | \f |
| 478 | /*********************************************************************** |
| 479 | Byte-order Conversion |
| 480 | ***********************************************************************/ |
| 481 | |
| 482 | /* Convert 32-bit value VALUE which is in little-endian byte-order |
| 483 | to host byte-order. */ |
| 484 | |
| 485 | static u_int32_t |
| 486 | le2hl (value) |
| 487 | u_int32_t value; |
| 488 | { |
| 489 | #ifdef WORDS_BIG_ENDIAN |
| 490 | unsigned char *p = (unsigned char *) &value; |
| 491 | value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24); |
| 492 | #endif |
| 493 | return value; |
| 494 | } |
| 495 | |
| 496 | |
| 497 | /* Convert 16-bit value VALUE which is in little-endian byte-order |
| 498 | to host byte-order. */ |
| 499 | |
| 500 | static u_int16_t |
| 501 | le2hs (value) |
| 502 | u_int16_t value; |
| 503 | { |
| 504 | #ifdef WORDS_BIG_ENDIAN |
| 505 | unsigned char *p = (unsigned char *) &value; |
| 506 | value = p[0] + (p[1] << 8); |
| 507 | #endif |
| 508 | return value; |
| 509 | } |
| 510 | |
| 511 | |
| 512 | /* Convert 32-bit value VALUE which is in big-endian byte-order |
| 513 | to host byte-order. */ |
| 514 | |
| 515 | static u_int32_t |
| 516 | be2hl (value) |
| 517 | u_int32_t value; |
| 518 | { |
| 519 | #ifndef WORDS_BIG_ENDIAN |
| 520 | unsigned char *p = (unsigned char *) &value; |
| 521 | value = p[3] + (p[2] << 8) + (p[1] << 16) + (p[0] << 24); |
| 522 | #endif |
| 523 | return value; |
| 524 | } |
| 525 | |
| 526 | |
| 527 | #if 0 /* Currently not used. */ |
| 528 | |
| 529 | /* Convert 16-bit value VALUE which is in big-endian byte-order |
| 530 | to host byte-order. */ |
| 531 | |
| 532 | static u_int16_t |
| 533 | be2hs (value) |
| 534 | u_int16_t value; |
| 535 | { |
| 536 | #ifndef WORDS_BIG_ENDIAN |
| 537 | unsigned char *p = (unsigned char *) &value; |
| 538 | value = p[1] + (p[0] << 8); |
| 539 | #endif |
| 540 | return value; |
| 541 | } |
| 542 | |
| 543 | #endif /* 0 */ |
| 544 | |
| 545 | \f |
| 546 | /*********************************************************************** |
| 547 | RIFF-WAVE (*.wav) |
| 548 | ***********************************************************************/ |
| 549 | |
| 550 | /* Try to initialize sound file S from S->header. S->header |
| 551 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
| 552 | sound file. If the file is a WAV-format file, set up interface |
| 553 | functions in S and convert header fields to host byte-order. |
| 554 | Value is non-zero if the file is a WAV file. */ |
| 555 | |
| 556 | static int |
| 557 | wav_init (s) |
| 558 | struct sound *s; |
| 559 | { |
| 560 | struct wav_header *header = (struct wav_header *) s->header; |
| 561 | |
| 562 | if (s->header_size < sizeof *header |
| 563 | || bcmp (s->header, "RIFF", 4) != 0) |
| 564 | return 0; |
| 565 | |
| 566 | /* WAV files are in little-endian order. Convert the header |
| 567 | if on a big-endian machine. */ |
| 568 | header->magic = le2hl (header->magic); |
| 569 | header->length = le2hl (header->length); |
| 570 | header->chunk_type = le2hl (header->chunk_type); |
| 571 | header->chunk_format = le2hl (header->chunk_format); |
| 572 | header->chunk_length = le2hl (header->chunk_length); |
| 573 | header->format = le2hs (header->format); |
| 574 | header->channels = le2hs (header->channels); |
| 575 | header->sample_rate = le2hl (header->sample_rate); |
| 576 | header->bytes_per_second = le2hl (header->bytes_per_second); |
| 577 | header->sample_size = le2hs (header->sample_size); |
| 578 | header->precision = le2hs (header->precision); |
| 579 | header->chunk_data = le2hl (header->chunk_data); |
| 580 | header->data_length = le2hl (header->data_length); |
| 581 | |
| 582 | /* Set up the interface functions for WAV. */ |
| 583 | s->type = RIFF; |
| 584 | s->play = wav_play; |
| 585 | |
| 586 | return 1; |
| 587 | } |
| 588 | |
| 589 | |
| 590 | /* Play RIFF-WAVE audio file S on sound device SD. */ |
| 591 | |
| 592 | static void |
| 593 | wav_play (s, sd) |
| 594 | struct sound *s; |
| 595 | struct sound_device *sd; |
| 596 | { |
| 597 | struct wav_header *header = (struct wav_header *) s->header; |
| 598 | |
| 599 | /* Let the device choose a suitable device-dependent format |
| 600 | for the file. */ |
| 601 | sd->choose_format (sd, s); |
| 602 | |
| 603 | /* Configure the device. */ |
| 604 | sd->sample_size = header->sample_size; |
| 605 | sd->sample_rate = header->sample_rate; |
| 606 | sd->bps = header->bytes_per_second; |
| 607 | sd->channels = header->channels; |
| 608 | sd->configure (sd); |
| 609 | |
| 610 | /* Copy sound data to the device. The WAV file specification is |
| 611 | actually more complex. This simple scheme worked with all WAV |
| 612 | files I found so far. If someone feels inclined to implement the |
| 613 | whole RIFF-WAVE spec, please do. */ |
| 614 | if (STRINGP (s->data)) |
| 615 | sd->write (sd, XSTRING (s->data)->data + sizeof *header, |
| 616 | STRING_BYTES (XSTRING (s->data)) - sizeof *header); |
| 617 | else |
| 618 | { |
| 619 | char *buffer; |
| 620 | int nbytes; |
| 621 | int blksize = 2048; |
| 622 | |
| 623 | buffer = (char *) alloca (blksize); |
| 624 | lseek (s->fd, sizeof *header, SEEK_SET); |
| 625 | |
| 626 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) |
| 627 | sd->write (sd, buffer, nbytes); |
| 628 | |
| 629 | if (nbytes < 0) |
| 630 | sound_perror ("Reading sound file"); |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | |
| 635 | \f |
| 636 | /*********************************************************************** |
| 637 | Sun Audio (*.au) |
| 638 | ***********************************************************************/ |
| 639 | |
| 640 | /* Sun audio file encodings. */ |
| 641 | |
| 642 | enum au_encoding |
| 643 | { |
| 644 | AU_ENCODING_ULAW_8 = 1, |
| 645 | AU_ENCODING_8, |
| 646 | AU_ENCODING_16, |
| 647 | AU_ENCODING_24, |
| 648 | AU_ENCODING_32, |
| 649 | AU_ENCODING_IEEE32, |
| 650 | AU_ENCODING_IEEE64, |
| 651 | AU_COMPRESSED = 23 |
| 652 | }; |
| 653 | |
| 654 | |
| 655 | /* Try to initialize sound file S from S->header. S->header |
| 656 | contains the first MAX_SOUND_HEADER_BYTES number of bytes from the |
| 657 | sound file. If the file is a AU-format file, set up interface |
| 658 | functions in S and convert header fields to host byte-order. |
| 659 | Value is non-zero if the file is an AU file. */ |
| 660 | |
| 661 | static int |
| 662 | au_init (s) |
| 663 | struct sound *s; |
| 664 | { |
| 665 | struct au_header *header = (struct au_header *) s->header; |
| 666 | |
| 667 | if (s->header_size < sizeof *header |
| 668 | || bcmp (s->header, ".snd", 4) != 0) |
| 669 | return 0; |
| 670 | |
| 671 | header->magic_number = be2hl (header->magic_number); |
| 672 | header->data_offset = be2hl (header->data_offset); |
| 673 | header->data_size = be2hl (header->data_size); |
| 674 | header->encoding = be2hl (header->encoding); |
| 675 | header->sample_rate = be2hl (header->sample_rate); |
| 676 | header->channels = be2hl (header->channels); |
| 677 | |
| 678 | /* Set up the interface functions for AU. */ |
| 679 | s->type = SUN_AUDIO; |
| 680 | s->play = au_play; |
| 681 | |
| 682 | return 1; |
| 683 | } |
| 684 | |
| 685 | |
| 686 | /* Play Sun audio file S on sound device SD. */ |
| 687 | |
| 688 | static void |
| 689 | au_play (s, sd) |
| 690 | struct sound *s; |
| 691 | struct sound_device *sd; |
| 692 | { |
| 693 | struct au_header *header = (struct au_header *) s->header; |
| 694 | |
| 695 | sd->sample_size = 0; |
| 696 | sd->sample_rate = header->sample_rate; |
| 697 | sd->bps = 0; |
| 698 | sd->channels = header->channels; |
| 699 | sd->choose_format (sd, s); |
| 700 | sd->configure (sd); |
| 701 | |
| 702 | if (STRINGP (s->data)) |
| 703 | sd->write (sd, XSTRING (s->data)->data + header->data_offset, |
| 704 | STRING_BYTES (XSTRING (s->data)) - header->data_offset); |
| 705 | else |
| 706 | { |
| 707 | int blksize = 2048; |
| 708 | char *buffer; |
| 709 | int nbytes; |
| 710 | |
| 711 | /* Seek */ |
| 712 | lseek (s->fd, header->data_offset, SEEK_SET); |
| 713 | |
| 714 | /* Copy sound data to the device. */ |
| 715 | buffer = (char *) alloca (blksize); |
| 716 | while ((nbytes = emacs_read (s->fd, buffer, blksize)) > 0) |
| 717 | sd->write (sd, buffer, nbytes); |
| 718 | |
| 719 | if (nbytes < 0) |
| 720 | sound_perror ("Reading sound file"); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | |
| 725 | \f |
| 726 | /*********************************************************************** |
| 727 | Voxware Driver Interface |
| 728 | ***********************************************************************/ |
| 729 | |
| 730 | /* This driver is available on GNU/Linux, and the free BSDs. FreeBSD |
| 731 | has a compatible own driver aka Luigi's driver. */ |
| 732 | |
| 733 | |
| 734 | /* Open device SD. If SD->file is non-null, open that device, |
| 735 | otherwise use a default device name. */ |
| 736 | |
| 737 | static void |
| 738 | vox_open (sd) |
| 739 | struct sound_device *sd; |
| 740 | { |
| 741 | char *file; |
| 742 | |
| 743 | /* Open the sound device. Default is /dev/dsp. */ |
| 744 | if (sd->file) |
| 745 | file = sd->file; |
| 746 | else |
| 747 | file = DEFAULT_SOUND_DEVICE; |
| 748 | |
| 749 | sd->fd = emacs_open (file, O_WRONLY, 0); |
| 750 | if (sd->fd < 0) |
| 751 | sound_perror (file); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | /* Configure device SD from parameters in it. */ |
| 756 | |
| 757 | static void |
| 758 | vox_configure (sd) |
| 759 | struct sound_device *sd; |
| 760 | { |
| 761 | int requested; |
| 762 | |
| 763 | xassert (sd->fd >= 0); |
| 764 | |
| 765 | /* Device parameters apparently depend on each other in undocumented |
| 766 | ways (not to imply that there is any real documentation). Be |
| 767 | careful when reordering the calls below. */ |
| 768 | if (sd->sample_size > 0 |
| 769 | && ioctl (sd->fd, SNDCTL_DSP_SAMPLESIZE, &sd->sample_size) < 0) |
| 770 | sound_perror ("Setting sample size"); |
| 771 | |
| 772 | if (sd->bps > 0 |
| 773 | && ioctl (sd->fd, SNDCTL_DSP_SPEED, &sd->bps) < 0) |
| 774 | sound_perror ("Setting speed"); |
| 775 | |
| 776 | if (sd->sample_rate > 0 |
| 777 | && ioctl (sd->fd, SOUND_PCM_WRITE_RATE, &sd->sample_rate) < 0) |
| 778 | sound_perror ("Setting sample rate"); |
| 779 | |
| 780 | requested = sd->format; |
| 781 | if (ioctl (sd->fd, SNDCTL_DSP_SETFMT, &sd->format) < 0) |
| 782 | sound_perror ("Setting format"); |
| 783 | else if (requested != sd->format) |
| 784 | error ("Setting format"); |
| 785 | |
| 786 | if (sd->channels > 1 |
| 787 | && ioctl (sd->fd, SNDCTL_DSP_STEREO, &sd->channels) < 0) |
| 788 | sound_perror ("Setting channels"); |
| 789 | |
| 790 | if (sd->volume > 0 |
| 791 | && ioctl (sd->fd, SOUND_MIXER_WRITE_PCM, &sd->volume) < 0) |
| 792 | sound_perror ("Setting volume"); |
| 793 | } |
| 794 | |
| 795 | |
| 796 | /* Close device SD if it is open. */ |
| 797 | |
| 798 | static void |
| 799 | vox_close (sd) |
| 800 | struct sound_device *sd; |
| 801 | { |
| 802 | if (sd->fd >= 0) |
| 803 | { |
| 804 | /* Flush sound data, and reset the device. */ |
| 805 | ioctl (sd->fd, SNDCTL_DSP_SYNC, NULL); |
| 806 | ioctl (sd->fd, SNDCTL_DSP_RESET, NULL); |
| 807 | |
| 808 | /* Close the device. */ |
| 809 | emacs_close (sd->fd); |
| 810 | sd->fd = -1; |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | |
| 815 | /* Choose device-dependent format for device SD from sound file S. */ |
| 816 | |
| 817 | static void |
| 818 | vox_choose_format (sd, s) |
| 819 | struct sound_device *sd; |
| 820 | struct sound *s; |
| 821 | { |
| 822 | if (s->type == RIFF) |
| 823 | { |
| 824 | struct wav_header *h = (struct wav_header *) s->header; |
| 825 | if (h->precision == 8) |
| 826 | sd->format = AFMT_U8; |
| 827 | else if (h->precision == 16) |
| 828 | sd->format = AFMT_S16_LE; |
| 829 | else |
| 830 | error ("Unsupported WAV file format"); |
| 831 | } |
| 832 | else if (s->type == SUN_AUDIO) |
| 833 | { |
| 834 | struct au_header *header = (struct au_header *) s->header; |
| 835 | switch (header->encoding) |
| 836 | { |
| 837 | case AU_ENCODING_ULAW_8: |
| 838 | case AU_ENCODING_IEEE32: |
| 839 | case AU_ENCODING_IEEE64: |
| 840 | sd->format = AFMT_MU_LAW; |
| 841 | break; |
| 842 | |
| 843 | case AU_ENCODING_8: |
| 844 | case AU_ENCODING_16: |
| 845 | case AU_ENCODING_24: |
| 846 | case AU_ENCODING_32: |
| 847 | sd->format = AFMT_S16_LE; |
| 848 | break; |
| 849 | |
| 850 | default: |
| 851 | error ("Unsupported AU file format"); |
| 852 | } |
| 853 | } |
| 854 | else |
| 855 | abort (); |
| 856 | } |
| 857 | |
| 858 | |
| 859 | /* Initialize device SD. Set up the interface functions in the device |
| 860 | structure. */ |
| 861 | |
| 862 | static void |
| 863 | vox_init (sd) |
| 864 | struct sound_device *sd; |
| 865 | { |
| 866 | sd->fd = -1; |
| 867 | sd->open = vox_open; |
| 868 | sd->close = vox_close; |
| 869 | sd->configure = vox_configure; |
| 870 | sd->choose_format = vox_choose_format; |
| 871 | sd->write = vox_write; |
| 872 | } |
| 873 | |
| 874 | |
| 875 | /* Write NBYTES bytes from BUFFER to device SD. */ |
| 876 | |
| 877 | static void |
| 878 | vox_write (sd, buffer, nbytes) |
| 879 | struct sound_device *sd; |
| 880 | char *buffer; |
| 881 | int nbytes; |
| 882 | { |
| 883 | int nwritten = emacs_write (sd->fd, buffer, nbytes); |
| 884 | if (nwritten < 0) |
| 885 | sound_perror ("Writing to sound device"); |
| 886 | } |
| 887 | |
| 888 | |
| 889 | \f |
| 890 | /*********************************************************************** |
| 891 | Initialization |
| 892 | ***********************************************************************/ |
| 893 | |
| 894 | void |
| 895 | syms_of_sound () |
| 896 | { |
| 897 | QCdevice = intern (":device"); |
| 898 | staticpro (&QCdevice); |
| 899 | QCvolume = intern (":volume"); |
| 900 | staticpro (&QCvolume); |
| 901 | Qsound = intern ("sound"); |
| 902 | staticpro (&Qsound); |
| 903 | Qplay_sound_functions = intern ("play-sound-functions"); |
| 904 | staticpro (&Qplay_sound_functions); |
| 905 | |
| 906 | defsubr (&Splay_sound); |
| 907 | } |
| 908 | |
| 909 | |
| 910 | void |
| 911 | init_sound () |
| 912 | { |
| 913 | } |
| 914 | |
| 915 | #endif /* HAVE_SOUND */ |