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date Mon, 13 Aug 2007 08:45:50 +0200
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1 /* nas.c --- XEmacs support for the Network Audio System server.
2 *
3 * Author: Richard Caley <R.Caley@ed.ac.uk>
4 *
5 * Copyright 1994 Free Software Foundation, Inc.
6 * Copyright 1993 Network Computing Devices, Inc.
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and
9 * its documentation for any purpose is hereby granted without fee, provided
10 * that the above copyright notice appear in all copies and that both that
11 * copyright notice and this permission notice appear in supporting
12 * documentation, and that the name Network Computing Devices, Inc. not be
13 * used in advertising or publicity pertaining to distribution of this
14 * software without specific, written prior permission.
15 *
16 * THIS SOFTWARE IS PROVIDED 'AS-IS'. NETWORK COMPUTING DEVICES, INC.,
17 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT
18 * LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
19 * PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT SHALL NETWORK
20 * COMPUTING DEVICES, INC., BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING
21 * SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF USE, DATA,
22 * OR PROFITS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF, AND REGARDLESS OF
23 * WHETHER IN AN ACTION IN CONTRACT, TORT OR NEGLIGENCE, ARISING OUT OF OR IN
24 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 */
26
27 /* Synched up with: Not in FSF. */
28
29 /* There are four compile-time options.
30 *
31 * XTOOLKIT This will be part of an Xt program.
32 *
33 * XTEVENTS The playing will be supervised asynchronously by the Xt event
34 * loop. If not set, playing will be completed within the call
35 * to play_file etc.
36 *
37 * ROBUST_PLAY Causes errors in nas to be caught. This means that the
38 * program will attempt not to die if the nas server does.
39 *
40 * CACHE_SOUNDS Causes the sounds to be played in buckets in the NAS
41 * server. They are named by their comment field, or if that is
42 * empty by the filename, or for play_sound_data by a name made up
43 * from the sample itself.
44 */
45
46 /* CHANGES:
47 * 10/8/94, rjc Changed names from netaudio to nas
48 * Added back asynchronous play if nas library has
49 * correct error facilities.
50 * 4/11/94, rjc Added wait_for_sounds to be called when user wants to
51 * be sure all play has finished.
52 */
53
54 #if __STDC__ || defined (STDC_HEADERS)
55
56 # include <stdlib.h>
57 # include <unistd.h>
58 # include <stdarg.h>
59
60 #endif
61
62 #include <stdio.h>
63 #include <string.h>
64 #include <config.h> /* for CONST in syssignal.h (neal@ctd.comsat.com) */
65 #include "syssignal.h"
66
67 #include <audio/audiolib.h>
68 #include <audio/soundlib.h>
69 #include <audio/snd.h>
70 #include <audio/fileutil.h>
71
72 #ifdef emacs
73
74 # include <config.h>
75 # include "lisp.h"
76
77 # define XTOOLKIT
78 # define XTEVENTS
79 # define ROBUST_PLAY
80 # define CACHE_SOUNDS
81
82 /*
83 * For old NAS libraries, force playing to be synchronous
84 * and declare the long jump point locally.
85 */
86
87 # if defined (NAS_NO_ERROR_JUMP)
88
89 # undef XTEVENTS
90
91 # include <setjmp.h>
92 jmp_buf AuXtErrorJump;
93 # endif
94
95 /* The GETTEXT is correct. --ben */
96 # define warn(str) warn_when_safe (Qnas, Qwarning, "nas: %s ", GETTEXT (str))
97
98 # define play_sound_file nas_play_sound_file
99 # define play_sound_data nas_play_sound_data
100 # define wait_for_sounds nas_wait_for_sounds
101 # define init_play nas_init_play
102 # define close_down_play nas_close_down_play
103
104 #else /* !emacs */
105 # define warn(str) fprintf (stderr, "%s\n", (str))
106 # define CONST const
107 #endif /* emacs */
108
109 #ifdef XTOOLKIT
110 # include <X11/Intrinsic.h>
111 # include <audio/Xtutil.h>
112 #endif
113
114 #if defined (ROBUST_PLAY)
115 static AuBool CatchIoErrorAndJump (AuServer *aud);
116 static AuBool CatchErrorAndJump (AuServer *aud, AuErrorEvent *event);
117 SIGTYPE sigpipe_handle (int signo);
118 #endif
119
120 extern Lisp_Object Vsynchronous_sounds;
121
122 static Sound SoundOpenDataForReading (unsigned char *data, int length);
123
124 static AuServer *aud;
125
126 /* count of sounds currently being played. */
127 static int sounds_in_play;
128
129
130 #ifdef XTOOLKIT
131 static Display *aud_server;
132 static XtInputId input_id;
133 #else
134 static char *aud_server;
135 #endif /* XTOOLKIT */
136
137 char *
138 init_play (
139 #ifdef XTOOLKIT
140 Display *display
141 #else
142 char *server
143 #endif
144 )
145 {
146 char *err_message;
147 SIGTYPE (*old_sigpipe) ();
148
149 #ifdef XTOOLKIT
150 char * server = DisplayString (display);
151 XtAppContext app_context = XtDisplayToApplicationContext (display);
152
153 aud_server = display;
154 #else
155
156 aud_server = server;
157 #endif
158
159 #ifdef ROBUST_PLAY
160 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
161 if (setjmp (AuXtErrorJump))
162 {
163 signal (SIGPIPE, old_sigpipe);
164 #ifdef emacs
165 start_interrupts ();
166 #endif
167 return "error in NAS";
168 }
169 #endif
170
171 #if defined (ROBUST_PLAY) && !defined (NAS_NO_ERROR_JUMP)
172 AuDefaultIOErrorHandler = CatchIoErrorAndJump;
173 AuDefaultErrorHandler = CatchErrorAndJump;
174 #endif
175
176 #ifdef emacs
177 stop_interrupts ();
178 #endif
179 aud = AuOpenServer (server, 0, NULL, 0, NULL, &err_message);
180 #ifdef emacs
181 start_interrupts ();
182 #endif
183 if (!aud)
184 {
185 #ifdef ROBUST_PLAY
186 signal (SIGPIPE, old_sigpipe);
187 #endif
188 if (err_message == NULL)
189 return "Can't connect to audio server";
190 else
191 return err_message;
192 }
193
194 #if defined (ROBUST_PLAY)
195 # if defined (NAS_NO_ERROR_JUMP)
196 aud->funcs.ioerror_handler = CatchIoErrorAndJump;
197 aud->funcs.error_handler = CatchErrorAndJump;
198 # else /* !NAS_NO_ERROR_JUMP */
199 AuDefaultIOErrorHandler = NULL;
200 AuDefaultErrorHandler = NULL;
201 # endif
202 #endif
203
204 #ifdef XTEVENTS
205 input_id = AuXtAppAddAudioHandler (app_context, aud);
206 #endif
207
208 #ifdef CACHE_SOUNDS
209 AuSetCloseDownMode (aud, AuCloseDownRetainPermanent, NULL);
210 #endif
211
212 #ifdef ROBUST_PLAY
213 signal (SIGPIPE, old_sigpipe);
214 #endif
215
216 sounds_in_play = 0;
217
218 return NULL;
219 }
220
221 void
222 close_down_play (void)
223
224 {
225 AuCloseServer (aud);
226 warn ("disconnected from audio server");
227 }
228
229 /********************************************************************\
230 * *
231 * Callback which is run when the sound finishes playing. *
232 * *
233 \********************************************************************/
234
235 static void
236 doneCB (AuServer *aud,
237 AuEventHandlerRec *handler,
238 AuEvent *ev,
239 AuPointer data)
240 {
241 int *in_play_p = (int *) data;
242
243 (*in_play_p) --;
244 }
245
246 #ifdef CACHE_SOUNDS
247
248 /********************************************************************\
249 * *
250 * Play a sound by playing the relevant bucket, if any or *
251 * downloading it if not. *
252 * *
253 \********************************************************************/
254
255 static void
256 do_caching_play (Sound s,
257 int volume,
258 unsigned char *buf)
259
260 {
261 AuBucketAttributes *list, b;
262 AuBucketID id;
263 int n;
264
265 AuSetString (AuBucketDescription (&b),
266 AuStringLatin1, strlen (SoundComment (s)), SoundComment (s));
267
268 list = AuListBuckets (aud, AuCompCommonDescriptionMask, &b, &n, NULL);
269
270 if (list == NULL)
271 {
272 unsigned char *my_buf;
273
274 if (buf==NULL)
275 {
276 if ((my_buf=malloc (SoundNumBytes (s)))==NULL)
277 {
278 return;
279 }
280
281 if (SoundReadFile (my_buf, SoundNumBytes (s), s) != SoundNumBytes (s))
282 {
283 free (my_buf);
284 return;
285 }
286 }
287 else
288 my_buf=buf;
289
290 id = AuSoundCreateBucketFromData (aud,
291 s,
292 my_buf,
293 AuAccessAllMasks,
294 NULL,
295 NULL);
296 if (buf == NULL)
297 free (my_buf);
298 }
299 else /* found cached sound */
300 {
301 id = AuBucketIdentifier (list);
302 AuFreeBucketAttributes (aud, n, list);
303 }
304
305 sounds_in_play++;
306
307 AuSoundPlayFromBucket (aud,
308 id,
309 AuNone,
310 AuFixedPointFromFraction (volume, 100),
311 doneCB, (AuPointer) &sounds_in_play,
312 1,
313 NULL, NULL,
314 NULL, NULL);
315
316 }
317 #endif /* CACHE_SOUNDS */
318
319
320 void
321 wait_for_sounds (void)
322
323 {
324 AuEvent ev;
325
326 while (sounds_in_play>0)
327 {
328 AuNextEvent (aud, AuTrue, &ev);
329 AuDispatchEvent (aud, &ev);
330 }
331 }
332
333 int
334 play_sound_file (char *sound_file,
335 int volume)
336 {
337 SIGTYPE (*old_sigpipe) ();
338
339 #ifdef ROBUST_PLAY
340 old_sigpipe=signal (SIGPIPE, sigpipe_handle);
341 if (setjmp (AuXtErrorJump))
342 {
343 signal (SIGPIPE, old_sigpipe);
344 return 0;
345 }
346 #endif
347
348 if (aud==NULL)
349 if (aud_server != NULL)
350 {
351 char *m;
352 /* attempt to reconect */
353 if ((m=init_play (aud_server))!= NULL)
354 {
355
356 #ifdef ROBUST_PLAY
357 signal (SIGPIPE, old_sigpipe);
358 #endif
359 return 0;
360 }
361 }
362 else
363 {
364 warn ("Attempt to play with no audio init\n");
365 #ifdef ROBUST_PLAY
366 signal (SIGPIPE, old_sigpipe);
367 #endif
368 return 0;
369 }
370
371 #ifndef CACHE_SOUNDS
372 sounds_in_play++;
373 AuSoundPlayFromFile (aud,
374 sound_file,
375 AuNone,
376 AuFixedPointFromFraction (volume,100),
377 doneCB, (AuPointer) &sounds_in_play,
378 NULL,
379 NULL,
380 NULL,
381 NULL);
382 #else
383 /* Cache the sounds in buckets on the server */
384
385 {
386 Sound s;
387
388 if ((s = SoundOpenFileForReading (sound_file))==NULL)
389 {
390 #ifdef ROBUST_PLAY
391 signal (SIGPIPE, old_sigpipe);
392 #endif
393 return 0;
394 }
395
396 if (SoundComment (s) == NULL || SoundComment (s)[0] == '\0')
397 {
398 SoundComment (s) = FileCommentFromFilename (sound_file);
399 }
400
401 do_caching_play (s, volume, NULL);
402
403 SoundCloseFile (s);
404
405 }
406 #endif /* CACHE_SOUNDS */
407
408 #ifndef XTEVENTS
409 wait_for_sounds ();
410 #else
411 if (!NILP (Vsynchronous_sounds))
412 {
413 wait_for_sounds ();
414 }
415 #endif
416
417 #ifdef ROBUST_PLAY
418 signal (SIGPIPE, old_sigpipe);
419 #endif
420
421 return 1;
422 }
423
424 int
425 play_sound_data (unsigned char *data,
426 int length,
427 int volume)
428 {
429 Sound s;
430 int offset;
431 SIGTYPE (*old_sigpipe) ();
432
433 #if !defined (XTEVENTS)
434 AuEvent ev;
435 #endif
436
437 #ifdef ROBUST_PLAY
438 old_sigpipe = signal (SIGPIPE, sigpipe_handle);
439 if (setjmp (AuXtErrorJump) !=0)
440 {
441 signal (SIGPIPE, old_sigpipe);
442 return 0;
443 }
444 #endif
445
446
447 if (aud == NULL)
448 if (aud_server != NULL)
449 {
450 char *m;
451 /* attempt to reconect */
452 if ((m = init_play (aud_server)) != NULL)
453 {
454 #ifdef ROBUST_PLAY
455 signal (SIGPIPE, old_sigpipe);
456 #endif
457 return 0;
458 }
459 }
460 else
461 {
462 warn ("Attempt to play with no audio init\n");
463 #ifdef ROBUST_PLAY
464 signal (SIGPIPE, old_sigpipe);
465 #endif
466 return 0;
467 }
468
469 if ((s=SoundOpenDataForReading (data, length))==NULL)
470 {
471 warn ("unknown sound type");
472 #ifdef ROBUST_PLAY
473 signal (SIGPIPE, old_sigpipe);
474 #endif
475 return 0;
476 }
477
478 if (SoundFileFormat (s) == SoundFileFormatSnd)
479 {
480 /* hack, hack */
481 offset = ((SndInfo *) (s->formatInfo))->h.dataOffset;
482 }
483 else
484 {
485 warn ("only understand snd files at the moment");
486 SoundCloseFile (s);
487 #ifdef ROBUST_PLAY
488 signal (SIGPIPE, old_sigpipe);
489 #endif
490 return 0;
491 }
492
493 #ifndef CACHE_SOUNDS
494 sounds_in_play++;
495 AuSoundPlayFromData (aud,
496 s,
497 data+offset,
498 AuNone,
499 AuFixedPointFromFraction (volume,100),
500 doneCB, (AuPointer) &sounds_in_play,
501 NULL,
502 NULL,
503 NULL,
504 NULL);
505 #else
506 /* Cache the sounds in buckets on the server */
507
508 {
509 do_caching_play (s, volume, data+offset);
510 }
511 #endif /* CACHE_SOUNDS */
512
513
514 #ifndef XTEVENTS
515 wait_for_sounds ();
516 #else
517 if (!NILP (Vsynchronous_sounds))
518 {
519 wait_for_sounds ();
520 }
521 #endif
522
523 SoundCloseFile (s);
524
525 #ifdef ROBUST_PLAY
526 signal (SIGPIPE, old_sigpipe);
527 #endif
528
529 return 1;
530 }
531
532 #if defined (ROBUST_PLAY)
533
534 /********************************************************************\
535 * *
536 * Code to protect the client from server shutdowns. *
537 * *
538 * This is unbelievably horrible. *
539 * *
540 \********************************************************************/
541
542 static AuBool
543 CatchIoErrorAndJump (AuServer *old_aud)
544 {
545 if (old_aud)
546 warn ("Audio Server connection broken");
547 else
548 warn ("Audio Server connection broken because of signal");
549
550 #ifdef XTEVENTS
551 #ifdef XTOOLKIT
552 {
553 AuXtAppRemoveAudioHandler (aud, input_id);
554 }
555 #endif
556
557 if (aud)
558 AuCloseServer (aud);
559 aud = NULL;
560 sounds_in_play = 0;
561
562 longjmp (AuXtErrorJump, 1);
563
564 #else /* not XTEVENTS */
565
566 if (aud)
567 AuCloseServer (aud);
568 aud = NULL;
569 sounds_in_play = 0;
570 longjmp (AuXtErrorJump, 1);
571
572 #endif /* XTEVENTS */
573 }
574
575 SIGTYPE
576 sigpipe_handle (int signo)
577 {
578 CatchIoErrorAndJump (NULL);
579 }
580
581 static AuBool
582 CatchErrorAndJump (AuServer *old_aud,
583 AuErrorEvent *event)
584 {
585 return CatchIoErrorAndJump (old_aud);
586 }
587
588 #endif /* ROBUST_PLAY */
589
590 /********************************************************************\
591 * *
592 * This code is here because the nas Sound library doesn't *
593 * support playing from a file buffered in memory. It's a fairly *
594 * direct translation of the file-based equivalent. *
595 * *
596 * Since we don't have a filename, samples with no comment field *
597 * are named by a section of their content. *
598 * *
599 \********************************************************************/
600
601 /* Create a name from the sound. */
602
603 static char *
604 NameFromData (CONST unsigned char *buf,
605 int len)
606
607 {
608 unsigned char name[9];
609 int i;
610 char *s;
611
612 buf+=len/2;
613 len -= len/2;
614
615 i=0;
616 while (i<8 && len >0)
617 {
618 while (*buf < 32 && len>0)
619 {
620 buf++;
621 len--;
622 }
623 name[i]= *buf;
624 i++;
625 buf++;
626 len--;
627 }
628
629 name[i]='\0';
630
631 if (i==8)
632 {
633 strcpy (s=malloc (10), name);
634 }
635 else
636 {
637 strcpy (s=malloc (15), "short sound");
638 }
639
640 return s;
641 }
642
643 /* Code to do a pseudo-open on a data buffer. Only for snd files at the
644 moment.
645 */
646
647 static SndInfo *
648 SndOpenDataForReading (CONST char *data,
649 int length)
650
651 {
652 SndInfo *si;
653 int size;
654
655 if (!(si = (SndInfo *) malloc (sizeof (SndInfo))))
656 return NULL;
657
658 si->comment = NULL;
659 si->writing = 0;
660
661 memcpy (&si->h, data, sizeof (SndHeader));
662
663 if (LITTLE_ENDIAN)
664 {
665 char n;
666
667 swapl (&si->h.magic, n);
668 swapl (&si->h.dataOffset, n);
669 swapl (&si->h.dataSize, n);
670 swapl (&si->h.format, n);
671 swapl (&si->h.sampleRate, n);
672 swapl (&si->h.tracks, n);
673 }
674
675 if (si->h.magic != SND_MAGIC_NUM)
676 {
677 free (si);
678 return NULL;
679 }
680
681 size = si->h.dataOffset - sizeof (SndHeader);
682
683 if (size)
684 {
685 if (!(si->comment = (char *) malloc (size + 1)))
686 {
687 free (si);
688 return NULL;
689 }
690
691 memcpy (si->comment, data+sizeof (SndHeader), size);
692
693 *(si->comment + size) = 0;
694 if (*si->comment == '\0')
695 si->comment =
696 NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
697 }
698 else
699 si->comment = NameFromData (data+si->h.dataOffset, length-si->h.dataOffset);
700
701 si->h.dataSize = length-si->h.dataOffset;
702
703 si->fp=NULL;
704
705 return si;
706 }
707
708 static Sound
709 SoundOpenDataForReading (unsigned char *data,
710 int length)
711
712 {
713 Sound s;
714
715 if (!(s = (Sound) malloc (sizeof (SoundRec))))
716 return NULL;
717
718 if ((s->formatInfo = SndOpenDataForReading (data, length))==NULL)
719 {
720 free (s);
721 return NULL;
722 }
723
724
725 if (!(SoundFileInfo[SoundFileFormatSnd].toSound) (s))
726 {
727 SndCloseFile (s->formatInfo);
728 free (s);
729 return NULL;
730 }
731
732 return s;
733 }
734