2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 2002, Pauline Middelink
7 * See http://www.asterisk.org for more information about
8 * the Asterisk project. Please do not directly contact
9 * any of the maintainers of this project for assistance;
10 * the project provides a web site, mailing lists and IRC
11 * channels for your use.
13 * This program is free software, distributed under the terms of
14 * the GNU General Public License Version 2. See the LICENSE file
15 * at the top of the source tree.
20 * \brief Tone Management
22 * \author Pauline Middelink <middelink@polyware.nl>
24 * This set of function allow us to play a list of tones on a channel.
25 * Each element has two frequencies, which are mixed together and a
26 * duration. For silence both frequencies can be set to 0.
27 * The playtones can be given as a comma separated string.
33 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
37 #include "asterisk/lock.h"
38 #include "asterisk/linkedlists.h"
39 #include "asterisk/indications.h"
40 #include "asterisk/frame.h"
41 #include "asterisk/channel.h"
42 #include "asterisk/utils.h"
44 static int midi_tohz[128] = {
45 8,8,9,9,10,10,11,12,12,13,14,
46 15,16,17,18,19,20,21,23,24,25,
47 27,29,30,32,34,36,38,41,43,46,
48 48,51,55,58,61,65,69,73,77,82,
49 87,92,97,103,110,116,123,130,138,146,
50 155,164,174,184,195,207,220,233,246,261,
51 277,293,311,329,349,369,391,415,440,466,
52 493,523,554,587,622,659,698,739,783,830,
53 880,932,987,1046,1108,1174,1244,1318,1396,1479,
54 1567,1661,1760,1864,1975,2093,2217,2349,2489,2637,
55 2793,2959,3135,3322,3520,3729,3951,4186,4434,4698,
56 4978,5274,5587,5919,6271,6644,7040,7458,7902,8372,
57 8869,9397,9956,10548,11175,11839,12543
60 struct playtones_item {
71 struct playtones_def {
76 struct playtones_item *items;
79 struct playtones_state {
89 struct playtones_item *items;
95 unsigned char offset[AST_FRIENDLY_OFFSET];
99 static void playtones_release(struct ast_channel *chan, void *params)
101 struct playtones_state *ps = params;
104 ast_set_write_format(chan, ps->origwfmt);
111 static void * playtones_alloc(struct ast_channel *chan, void *params)
113 struct playtones_def *pd = params;
114 struct playtones_state *ps = NULL;
116 if (!(ps = ast_calloc(1, sizeof(*ps))))
119 ps->origwfmt = chan->writeformat;
121 if (ast_set_write_format(chan, AST_FORMAT_SLINEAR)) {
122 ast_log(LOG_WARNING, "Unable to set '%s' to signed linear format (write)\n", chan->name);
123 playtones_release(NULL, ps);
127 ps->reppos = pd->reppos;
128 ps->nitems = pd->nitems;
129 ps->items = pd->items;
133 /* Let interrupts interrupt :) */
134 if (pd->interruptible)
135 ast_set_flag(chan, AST_FLAG_WRITE_INT);
137 ast_clear_flag(chan, AST_FLAG_WRITE_INT);
142 static int playtones_generator(struct ast_channel *chan, void *data, int len, int samples)
144 struct playtones_state *ps = data;
145 struct playtones_item *pi;
147 /* we need to prepare a frame with 16 * timelen samples as we're
148 * generating SLIN audio
151 if (len > sizeof(ps->data) / 2 - 1) {
152 ast_log(LOG_WARNING, "Can't generate that much data!\n");
155 memset(&ps->f, 0, sizeof(ps->f));
157 pi = &ps->items[ps->npos];
158 if (ps->oldnpos != ps->npos) {
159 /* Load new parameters */
161 ps->v2_1 = pi->init_v2_1;
162 ps->v3_1 = pi->init_v3_1;
164 ps->v2_2 = pi->init_v2_2;
165 ps->v3_2 = pi->init_v3_2;
166 ps->oldnpos = ps->npos;
168 for (x = 0; x < len/2; x++) {
171 ps->v3_1 = (pi->fac1 * ps->v2_1 >> 15) - ps->v1_1;
175 ps->v3_2 = (pi->fac2 * ps->v2_2 >> 15) - ps->v1_2;
178 p = ps->v3_2 - 32768;
180 p = ((p * 9) / 10) + 1;
181 ps->data[x] = (ps->v3_1 * p) >> 15;
183 ps->data[x] = ps->v3_1 + ps->v3_2;
186 ps->f.frametype = AST_FRAME_VOICE;
187 ps->f.subclass = AST_FORMAT_SLINEAR;
189 ps->f.samples = samples;
190 ps->f.offset = AST_FRIENDLY_OFFSET;
191 ps->f.data = ps->data;
192 ps->f.delivery.tv_sec = 0;
193 ps->f.delivery.tv_usec = 0;
194 ast_write(chan, &ps->f);
197 if (pi->duration && ps->pos >= pi->duration * 8) { /* item finished? */
198 ps->pos = 0; /* start new item */
200 if (ps->npos >= ps->nitems) { /* last item? */
201 if (ps->reppos == -1) /* repeat set? */
203 ps->npos = ps->reppos; /* redo from top */
209 static struct ast_generator playtones = {
210 alloc: playtones_alloc,
211 release: playtones_release,
212 generate: playtones_generator,
215 int ast_playtones_start(struct ast_channel *chan, int vol, const char *playlst, int interruptible)
217 char *s, *data = ast_strdupa(playlst); /* cute */
218 struct playtones_def d = { vol, -1, 0, 1, NULL};
223 d.vol = 7219; /* Default to -8db */
225 d.interruptible = interruptible;
228 /* the stringp/data is not null here */
229 /* check if the data is separated with '|' or with ',' by default */
230 if (strchr(stringp,'|'))
234 s = strsep(&stringp,separator);
236 int freq1, freq2, time, modulate = 0, midinote = 0;
240 else if (d.reppos == -1)
242 if (sscanf(s, "%d+%d/%d", &freq1, &freq2, &time) == 3) {
243 /* f1+f2/time format */
244 } else if (sscanf(s, "%d+%d", &freq1, &freq2) == 2) {
247 } else if (sscanf(s, "%d*%d/%d", &freq1, &freq2, &time) == 3) {
248 /* f1*f2/time format */
250 } else if (sscanf(s, "%d*%d", &freq1, &freq2) == 2) {
254 } else if (sscanf(s, "%d/%d", &freq1, &time) == 2) {
257 } else if (sscanf(s, "%d", &freq1) == 1) {
261 } else if (sscanf(s, "M%d+M%d/%d", &freq1, &freq2, &time) == 3) {
262 /* Mf1+Mf2/time format */
264 } else if (sscanf(s, "M%d+M%d", &freq1, &freq2) == 2) {
268 } else if (sscanf(s, "M%d*M%d/%d", &freq1, &freq2, &time) == 3) {
269 /* Mf1*Mf2/time format */
272 } else if (sscanf(s, "M%d*M%d", &freq1, &freq2) == 2) {
277 } else if (sscanf(s, "M%d/%d", &freq1, &time) == 2) {
278 /* Mf1/time format */
281 } else if (sscanf(s, "M%d", &freq1) == 1) {
287 ast_log(LOG_WARNING,"%s: tone component '%s' of '%s' is no good\n",chan->name,s,playlst);
292 /* midi notes must be between 0 and 127 */
293 if ((freq1 >= 0) && (freq1 <= 127))
294 freq1 = midi_tohz[freq1];
298 if ((freq2 >= 0) && (freq2 <= 127))
299 freq2 = midi_tohz[freq2];
304 if (!(d.items = ast_realloc(d.items, (d.nitems + 1) * sizeof(*d.items)))) {
307 d.items[d.nitems].fac1 = 2.0 * cos(2.0 * M_PI * (freq1 / 8000.0)) * 32768.0;
308 d.items[d.nitems].init_v2_1 = sin(-4.0 * M_PI * (freq1 / 8000.0)) * d.vol;
309 d.items[d.nitems].init_v3_1 = sin(-2.0 * M_PI * (freq1 / 8000.0)) * d.vol;
311 d.items[d.nitems].fac2 = 2.0 * cos(2.0 * M_PI * (freq2 / 8000.0)) * 32768.0;
312 d.items[d.nitems].init_v2_2 = sin(-4.0 * M_PI * (freq2 / 8000.0)) * d.vol;
313 d.items[d.nitems].init_v3_2 = sin(-2.0 * M_PI * (freq2 / 8000.0)) * d.vol;
314 d.items[d.nitems].duration = time;
315 d.items[d.nitems].modulate = modulate;
318 s = strsep(&stringp,separator);
321 if (ast_activate_generator(chan, &playtones, &d)) {
328 void ast_playtones_stop(struct ast_channel *chan)
330 ast_deactivate_generator(chan);
333 /*--------------------------------------------*/
335 static AST_RWLIST_HEAD_STATIC(tone_zones, ind_tone_zone);
336 static struct ind_tone_zone *current_tonezone;
338 struct ind_tone_zone *ast_walk_indications(const struct ind_tone_zone *cur)
340 struct ind_tone_zone *tz = NULL;
342 AST_RWLIST_RDLOCK(&tone_zones);
343 /* If cur is not NULL, then we have to iterate through - otherwise just return the first entry */
345 AST_RWLIST_TRAVERSE(&tone_zones, tz, list) {
349 tz = AST_RWLIST_NEXT(tz, list);
351 tz = AST_RWLIST_FIRST(&tone_zones);
353 AST_RWLIST_UNLOCK(&tone_zones);
358 /* Set global indication country */
359 int ast_set_indication_country(const char *country)
361 struct ind_tone_zone *zone = NULL;
363 /* If no country is specified or we are unable to find the zone, then return not found */
364 if (!country || !(zone = ast_get_indication_zone(country)))
367 ast_verb(3, "Setting default indication country to '%s'\n", country);
369 /* Protect the current tonezone using the tone_zones lock as well */
370 AST_RWLIST_WRLOCK(&tone_zones);
371 current_tonezone = zone;
372 AST_RWLIST_UNLOCK(&tone_zones);
378 /* locate tone_zone, given the country. if country == NULL, use the default country */
379 struct ind_tone_zone *ast_get_indication_zone(const char *country)
381 struct ind_tone_zone *tz = NULL;
384 AST_RWLIST_RDLOCK(&tone_zones);
387 if (current_tonezone)
388 tz = current_tonezone;
390 tz = AST_LIST_FIRST(&tone_zones);
393 AST_RWLIST_TRAVERSE(&tone_zones, tz, list) {
394 if (!strcasecmp(tz->country, country))
399 /* If this is an alias then we have to search yet again otherwise we have found the zonezone */
400 if (tz->alias && tz->alias[0])
404 } while ((++alias_loop < 20) && tz);
407 AST_RWLIST_UNLOCK(&tone_zones);
409 /* If we reached the maximum loops to find the proper country via alias, print out a notice */
410 if (alias_loop == 20)
411 ast_log(LOG_NOTICE, "Alias loop for '%s' is bonkers\n", country);
416 /* locate a tone_zone_sound, given the tone_zone. if tone_zone == NULL, use the default tone_zone */
417 struct ind_tone_zone_sound *ast_get_indication_tone(const struct ind_tone_zone *zone, const char *indication)
419 struct ind_tone_zone_sound *ts = NULL;
421 AST_RWLIST_RDLOCK(&tone_zones);
423 /* If no zone is already specified we need to try to pick one */
425 if (current_tonezone) {
426 zone = current_tonezone;
427 } else if (!(zone = AST_LIST_FIRST(&tone_zones))) {
428 /* No zone has been found ;( */
429 AST_RWLIST_UNLOCK(&tone_zones);
434 /* Look through list of tones in the zone searching for the right one */
435 for (ts = zone->tones; ts; ts = ts->next) {
436 if (!strcasecmp(ts->name, indication))
440 AST_RWLIST_UNLOCK(&tone_zones);
445 /* helper function to delete a tone_zone in its entirety */
446 static inline void free_zone(struct ind_tone_zone* zone)
448 while (zone->tones) {
449 struct ind_tone_zone_sound *tmp = zone->tones->next;
450 ast_free((void *)zone->tones->name);
451 ast_free((void *)zone->tones->data);
452 ast_free(zone->tones);
456 if (zone->ringcadence)
457 ast_free(zone->ringcadence);
462 /*--------------------------------------------*/
464 /* add a new country, if country exists, it will be replaced. */
465 int ast_register_indication_country(struct ind_tone_zone *zone)
467 struct ind_tone_zone *tz = NULL;
469 AST_RWLIST_WRLOCK(&tone_zones);
470 AST_RWLIST_TRAVERSE_SAFE_BEGIN(&tone_zones, tz, list) {
471 /* If this is not the same zone, then just continue to the next entry */
472 if (strcasecmp(zone->country, tz->country))
474 /* If this zone we are going to remove is the current default then make the new zone the default */
475 if (tz == current_tonezone)
476 current_tonezone = zone;
477 /* Remove from the linked list */
478 AST_RWLIST_REMOVE_CURRENT(list);
479 /* Finally free the zone itself */
483 AST_RWLIST_TRAVERSE_SAFE_END;
485 /* Add zone to the list */
486 AST_RWLIST_INSERT_TAIL(&tone_zones, zone, list);
489 AST_RWLIST_UNLOCK(&tone_zones);
491 ast_verb(3, "Registered indication country '%s'\n", zone->country);
496 /* remove an existing country and all its indications, country must exist.
497 * Also, all countries which are an alias for the specified country are removed. */
498 int ast_unregister_indication_country(const char *country)
500 struct ind_tone_zone *tz = NULL;
503 AST_RWLIST_WRLOCK(&tone_zones);
504 AST_RWLIST_TRAVERSE_SAFE_BEGIN(&tone_zones, tz, list) {
505 if (country && (strcasecmp(country, tz->country) && strcasecmp(country, tz->alias)))
507 /* If this tonezone is the current default then unset it */
508 if (tz == current_tonezone) {
509 ast_log(LOG_NOTICE,"Removed default indication country '%s'\n", tz->country);
510 current_tonezone = NULL;
512 /* Remove from the list */
513 AST_RWLIST_REMOVE_CURRENT(list);
514 ast_verb(3, "Unregistered indication country '%s'\n", tz->country);
518 AST_RWLIST_TRAVERSE_SAFE_END;
519 AST_RWLIST_UNLOCK(&tone_zones);
524 /* add a new indication to a tone_zone. tone_zone must exist. if the indication already
525 * exists, it will be replaced. */
526 int ast_register_indication(struct ind_tone_zone *zone, const char *indication, const char *tonelist)
528 struct ind_tone_zone_sound *ts, *ps;
530 /* is it an alias? stop */
534 AST_RWLIST_WRLOCK(&tone_zones);
535 for (ps=NULL,ts=zone->tones; ts; ps=ts,ts=ts->next) {
536 if (!strcasecmp(indication,ts->name)) {
537 /* indication already there, replace */
538 ast_free((void*)ts->name);
539 ast_free((void*)ts->data);
544 /* not there, we have to add */
545 if (!(ts = ast_malloc(sizeof(*ts)))) {
546 AST_RWLIST_UNLOCK(&tone_zones);
551 if (!(ts->name = ast_strdup(indication)) || !(ts->data = ast_strdup(tonelist))) {
552 AST_RWLIST_UNLOCK(&tone_zones);
559 AST_RWLIST_UNLOCK(&tone_zones);
563 /* remove an existing country's indication. Both country and indication must exist */
564 int ast_unregister_indication(struct ind_tone_zone *zone, const char *indication)
566 struct ind_tone_zone_sound *ts,*ps = NULL, *tmp;
569 /* is it an alias? stop */
573 AST_RWLIST_WRLOCK(&tone_zones);
576 if (!strcasecmp(indication,ts->name)) {
577 /* indication found */
583 ast_free((void*)ts->name);
584 ast_free((void*)ts->data);
590 /* next zone please */
595 /* indication not found, goodbye */
596 AST_RWLIST_UNLOCK(&tone_zones);