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/options.h"
42 #include "asterisk/channel.h"
43 #include "asterisk/logger.h"
44 #include "asterisk/utils.h"
46 static int midi_tohz[128] = {
47 8,8,9,9,10,10,11,12,12,13,14,
48 15,16,17,18,19,20,21,23,24,25,
49 27,29,30,32,34,36,38,41,43,46,
50 48,51,55,58,61,65,69,73,77,82,
51 87,92,97,103,110,116,123,130,138,146,
52 155,164,174,184,195,207,220,233,246,261,
53 277,293,311,329,349,369,391,415,440,466,
54 493,523,554,587,622,659,698,739,783,830,
55 880,932,987,1046,1108,1174,1244,1318,1396,1479,
56 1567,1661,1760,1864,1975,2093,2217,2349,2489,2637,
57 2793,2959,3135,3322,3520,3729,3951,4186,4434,4698,
58 4978,5274,5587,5919,6271,6644,7040,7458,7902,8372,
59 8869,9397,9956,10548,11175,11839,12543
62 struct playtones_item {
73 struct playtones_def {
78 struct playtones_item *items;
81 struct playtones_state {
91 struct playtones_item *items;
97 unsigned char offset[AST_FRIENDLY_OFFSET];
101 static void playtones_release(struct ast_channel *chan, void *params)
103 struct playtones_state *ps = params;
106 ast_set_write_format(chan, ps->origwfmt);
113 static void * playtones_alloc(struct ast_channel *chan, void *params)
115 struct playtones_def *pd = params;
116 struct playtones_state *ps = NULL;
118 if (!(ps = ast_calloc(1, sizeof(*ps))))
121 ps->origwfmt = chan->writeformat;
123 if (ast_set_write_format(chan, AST_FORMAT_SLINEAR)) {
124 ast_log(LOG_WARNING, "Unable to set '%s' to signed linear format (write)\n", chan->name);
125 playtones_release(NULL, ps);
129 ps->reppos = pd->reppos;
130 ps->nitems = pd->nitems;
131 ps->items = pd->items;
135 /* Let interrupts interrupt :) */
136 if (pd->interruptible)
137 ast_set_flag(chan, AST_FLAG_WRITE_INT);
139 ast_clear_flag(chan, AST_FLAG_WRITE_INT);
144 static int playtones_generator(struct ast_channel *chan, void *data, int len, int samples)
146 struct playtones_state *ps = data;
147 struct playtones_item *pi;
149 /* we need to prepare a frame with 16 * timelen samples as we're
150 * generating SLIN audio
153 if (len > sizeof(ps->data) / 2 - 1) {
154 ast_log(LOG_WARNING, "Can't generate that much data!\n");
157 memset(&ps->f, 0, sizeof(ps->f));
159 pi = &ps->items[ps->npos];
160 if (ps->oldnpos != ps->npos) {
161 /* Load new parameters */
163 ps->v2_1 = pi->init_v2_1;
164 ps->v3_1 = pi->init_v3_1;
166 ps->v2_2 = pi->init_v2_2;
167 ps->v3_2 = pi->init_v3_2;
168 ps->oldnpos = ps->npos;
170 for (x=0;x<len/2;x++) {
173 ps->v3_1 = (pi->fac1 * ps->v2_1 >> 15) - ps->v1_1;
177 ps->v3_2 = (pi->fac2 * ps->v2_2 >> 15) - ps->v1_2;
180 p = ps->v3_2 - 32768;
182 p = ((p * 9) / 10) + 1;
183 ps->data[x] = (ps->v3_1 * p) >> 15;
185 ps->data[x] = ps->v3_1 + ps->v3_2;
188 ps->f.frametype = AST_FRAME_VOICE;
189 ps->f.subclass = AST_FORMAT_SLINEAR;
191 ps->f.samples = samples;
192 ps->f.offset = AST_FRIENDLY_OFFSET;
193 ps->f.data = ps->data;
194 ps->f.delivery.tv_sec = 0;
195 ps->f.delivery.tv_usec = 0;
196 ast_write(chan, &ps->f);
199 if (pi->duration && ps->pos >= pi->duration * 8) { /* item finished? */
200 ps->pos = 0; /* start new item */
202 if (ps->npos >= ps->nitems) { /* last item? */
203 if (ps->reppos == -1) /* repeat set? */
205 ps->npos = ps->reppos; /* redo from top */
211 static struct ast_generator playtones = {
212 alloc: playtones_alloc,
213 release: playtones_release,
214 generate: playtones_generator,
217 int ast_playtones_start(struct ast_channel *chan, int vol, const char *playlst, int interruptible)
219 char *s, *data = ast_strdupa(playlst); /* cute */
220 struct playtones_def d = { vol, -1, 0, 1, NULL};
225 d.vol = 7219; /* Default to -8db */
227 d.interruptible = interruptible;
230 /* the stringp/data is not null here */
231 /* check if the data is separated with '|' or with ',' by default */
232 if (strchr(stringp,'|'))
236 s = strsep(&stringp,separator);
238 int freq1, freq2, time, modulate=0, midinote=0;
242 else if (d.reppos == -1)
244 if (sscanf(s, "%d+%d/%d", &freq1, &freq2, &time) == 3) {
245 /* f1+f2/time format */
246 } else if (sscanf(s, "%d+%d", &freq1, &freq2) == 2) {
249 } else if (sscanf(s, "%d*%d/%d", &freq1, &freq2, &time) == 3) {
250 /* f1*f2/time format */
252 } else if (sscanf(s, "%d*%d", &freq1, &freq2) == 2) {
256 } else if (sscanf(s, "%d/%d", &freq1, &time) == 2) {
259 } else if (sscanf(s, "%d", &freq1) == 1) {
263 } else if (sscanf(s, "M%d+M%d/%d", &freq1, &freq2, &time) == 3) {
264 /* Mf1+Mf2/time format */
266 } else if (sscanf(s, "M%d+M%d", &freq1, &freq2) == 2) {
270 } else if (sscanf(s, "M%d*M%d/%d", &freq1, &freq2, &time) == 3) {
271 /* Mf1*Mf2/time format */
274 } else if (sscanf(s, "M%d*M%d", &freq1, &freq2) == 2) {
279 } else if (sscanf(s, "M%d/%d", &freq1, &time) == 2) {
280 /* Mf1/time format */
283 } else if (sscanf(s, "M%d", &freq1) == 1) {
289 ast_log(LOG_WARNING,"%s: tone component '%s' of '%s' is no good\n",chan->name,s,playlst);
294 /* midi notes must be between 0 and 127 */
295 if ((freq1 >= 0) && (freq1 <= 127))
296 freq1 = midi_tohz[freq1];
300 if ((freq2 >= 0) && (freq2 <= 127))
301 freq2 = midi_tohz[freq2];
306 if (!(d.items = ast_realloc(d.items, (d.nitems + 1) * sizeof(*d.items)))) {
309 d.items[d.nitems].fac1 = 2.0 * cos(2.0 * M_PI * (freq1 / 8000.0)) * 32768.0;
310 d.items[d.nitems].init_v2_1 = sin(-4.0 * M_PI * (freq1 / 8000.0)) * d.vol;
311 d.items[d.nitems].init_v3_1 = sin(-2.0 * M_PI * (freq1 / 8000.0)) * d.vol;
313 d.items[d.nitems].fac2 = 2.0 * cos(2.0 * M_PI * (freq2 / 8000.0)) * 32768.0;
314 d.items[d.nitems].init_v2_2 = sin(-4.0 * M_PI * (freq2 / 8000.0)) * d.vol;
315 d.items[d.nitems].init_v3_2 = sin(-2.0 * M_PI * (freq2 / 8000.0)) * d.vol;
316 d.items[d.nitems].duration = time;
317 d.items[d.nitems].modulate = modulate;
320 s = strsep(&stringp,separator);
323 if (ast_activate_generator(chan, &playtones, &d)) {
330 void ast_playtones_stop(struct ast_channel *chan)
332 ast_deactivate_generator(chan);
335 /*--------------------------------------------*/
337 static AST_RWLIST_HEAD_STATIC(tone_zones, ind_tone_zone);
338 static struct ind_tone_zone *current_tonezone;
340 struct ind_tone_zone *ast_walk_indications(const struct ind_tone_zone *cur)
342 struct ind_tone_zone *tz = NULL;
344 AST_RWLIST_RDLOCK(&tone_zones);
345 /* If cur is not NULL, then we have to iterate through - otherwise just return the first entry */
347 AST_RWLIST_TRAVERSE(&tone_zones, tz, list) {
351 tz = AST_RWLIST_NEXT(tz, list);
353 tz = AST_RWLIST_FIRST(&tone_zones);
355 AST_RWLIST_UNLOCK(&tone_zones);
360 /* Set global indication country */
361 int ast_set_indication_country(const char *country)
363 struct ind_tone_zone *zone = NULL;
365 /* If no country is specified or we are unable to find the zone, then return not found */
366 if (!country || !(zone = ast_get_indication_zone(country)))
369 ast_verb(3, "Setting default indication country to '%s'\n", country);
371 /* Protect the current tonezone using the tone_zones lock as well */
372 AST_RWLIST_WRLOCK(&tone_zones);
373 current_tonezone = zone;
374 AST_RWLIST_UNLOCK(&tone_zones);
380 /* locate tone_zone, given the country. if country == NULL, use the default country */
381 struct ind_tone_zone *ast_get_indication_zone(const char *country)
383 struct ind_tone_zone *tz = NULL;
386 AST_RWLIST_RDLOCK(&tone_zones);
389 if (current_tonezone)
390 tz = current_tonezone;
392 tz = AST_LIST_FIRST(&tone_zones);
395 AST_RWLIST_TRAVERSE(&tone_zones, tz, list) {
396 if (!strcasecmp(tz->country, country))
401 /* If this is an alias then we have to search yet again otherwise we have found the zonezone */
402 if (tz->alias && tz->alias[0])
406 } while ((++alias_loop < 20) && tz);
409 AST_RWLIST_UNLOCK(&tone_zones);
411 /* If we reached the maximum loops to find the proper country via alias, print out a notice */
412 if (alias_loop == 20)
413 ast_log(LOG_NOTICE, "Alias loop for '%s' is bonkers\n", country);
418 /* locate a tone_zone_sound, given the tone_zone. if tone_zone == NULL, use the default tone_zone */
419 struct ind_tone_zone_sound *ast_get_indication_tone(const struct ind_tone_zone *zone, const char *indication)
421 struct ind_tone_zone_sound *ts = NULL;
423 AST_RWLIST_RDLOCK(&tone_zones);
425 /* If no zone is already specified we need to try to pick one */
427 if (current_tonezone) {
428 zone = current_tonezone;
429 } else if (!(zone = AST_LIST_FIRST(&tone_zones))) {
430 /* No zone has been found ;( */
431 AST_RWLIST_UNLOCK(&tone_zones);
436 /* Look through list of tones in the zone searching for the right one */
437 for (ts = zone->tones; ts; ts = ts->next) {
438 if (!strcasecmp(ts->name, indication))
442 AST_RWLIST_UNLOCK(&tone_zones);
447 /* helper function to delete a tone_zone in its entirety */
448 static inline void free_zone(struct ind_tone_zone* zone)
450 while (zone->tones) {
451 struct ind_tone_zone_sound *tmp = zone->tones->next;
452 ast_free((void *)zone->tones->name);
453 ast_free((void *)zone->tones->data);
454 ast_free(zone->tones);
458 if (zone->ringcadence)
459 ast_free(zone->ringcadence);
464 /*--------------------------------------------*/
466 /* add a new country, if country exists, it will be replaced. */
467 int ast_register_indication_country(struct ind_tone_zone *zone)
469 struct ind_tone_zone *tz = NULL;
471 AST_RWLIST_WRLOCK(&tone_zones);
472 AST_RWLIST_TRAVERSE_SAFE_BEGIN(&tone_zones, tz, list) {
473 /* If this is not the same zone, then just continue to the next entry */
474 if (strcasecmp(zone->country, tz->country))
476 /* If this zone we are going to remove is the current default then make the new zone the default */
477 if (tz == current_tonezone)
478 current_tonezone = zone;
479 /* Remove from the linked list */
480 AST_RWLIST_REMOVE_CURRENT(list);
481 /* Finally free the zone itself */
485 AST_RWLIST_TRAVERSE_SAFE_END;
487 /* Add zone to the list */
488 AST_RWLIST_INSERT_TAIL(&tone_zones, zone, list);
491 AST_RWLIST_UNLOCK(&tone_zones);
493 ast_verb(3, "Registered indication country '%s'\n", zone->country);
498 /* remove an existing country and all its indications, country must exist.
499 * Also, all countries which are an alias for the specified country are removed. */
500 int ast_unregister_indication_country(const char *country)
502 struct ind_tone_zone *tz = NULL;
505 AST_RWLIST_WRLOCK(&tone_zones);
506 AST_RWLIST_TRAVERSE_SAFE_BEGIN(&tone_zones, tz, list) {
507 if (country && (strcasecmp(country, tz->country) && strcasecmp(country, tz->alias)))
509 /* If this tonezone is the current default then unset it */
510 if (tz == current_tonezone) {
511 ast_log(LOG_NOTICE,"Removed default indication country '%s'\n", tz->country);
512 current_tonezone = NULL;
514 /* Remove from the list */
515 AST_RWLIST_REMOVE_CURRENT(list);
516 ast_verb(3, "Unregistered indication country '%s'\n", tz->country);
520 AST_RWLIST_TRAVERSE_SAFE_END;
521 AST_RWLIST_UNLOCK(&tone_zones);
526 /* add a new indication to a tone_zone. tone_zone must exist. if the indication already
527 * exists, it will be replaced. */
528 int ast_register_indication(struct ind_tone_zone *zone, const char *indication, const char *tonelist)
530 struct ind_tone_zone_sound *ts, *ps;
532 /* is it an alias? stop */
536 AST_RWLIST_WRLOCK(&tone_zones);
537 for (ps=NULL,ts=zone->tones; ts; ps=ts,ts=ts->next) {
538 if (strcasecmp(indication,ts->name)==0) {
539 /* indication already there, replace */
540 ast_free((void*)ts->name);
541 ast_free((void*)ts->data);
546 /* not there, we have to add */
547 if (!(ts = ast_malloc(sizeof(*ts)))) {
548 AST_RWLIST_UNLOCK(&tone_zones);
553 if (!(ts->name = ast_strdup(indication)) || !(ts->data = ast_strdup(tonelist))) {
554 AST_RWLIST_UNLOCK(&tone_zones);
561 AST_RWLIST_UNLOCK(&tone_zones);
565 /* remove an existing country's indication. Both country and indication must exist */
566 int ast_unregister_indication(struct ind_tone_zone *zone, const char *indication)
568 struct ind_tone_zone_sound *ts,*ps = NULL, *tmp;
571 /* is it an alias? stop */
575 AST_RWLIST_WRLOCK(&tone_zones);
578 if (strcasecmp(indication,ts->name)==0) {
579 /* indication found */
585 ast_free((void*)ts->name);
586 ast_free((void*)ts->data);
592 /* next zone please */
597 /* indication not found, goodbye */
598 AST_RWLIST_UNLOCK(&tone_zones);