Asterisk - The Open Source Telephony Project  21.4.1
indications.c
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1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2002, Pauline Middelink
5  * Copyright (C) 2009, Digium, Inc.
6  *
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.
12  *
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.
16  */
17 
18 /*!
19  * \file
20  * \brief Indication Tone Handling
21  *
22  * \author Pauline Middelink <middelink@polyware.nl>
23  * \author Russell Bryant <russell@digium.com>
24  */
25 
26 /*** MODULEINFO
27  <support_level>core</support_level>
28  ***/
29 
30 #include "asterisk.h"
31 
32 #include <math.h>
33 
34 #include "asterisk/lock.h"
35 #include "asterisk/linkedlists.h"
36 #include "asterisk/indications.h"
37 #include "asterisk/frame.h"
38 #include "asterisk/format_cache.h"
39 #include "asterisk/channel.h"
40 #include "asterisk/utils.h"
41 #include "asterisk/cli.h"
42 #include "asterisk/module.h"
43 #include "asterisk/astobj2.h"
44 
45 #include "asterisk/_private.h" /* _init(), _reload() */
46 
47 /* Globals */
48 static const char config[] = "indications.conf";
49 
50 static const int midi_tohz[128] = {
51  8, 8, 9, 9, 10, 10, 11, 12, 12, 13,
52  14, 15, 16, 17, 18, 19, 20, 21, 23, 24,
53  25, 27, 29, 30, 32, 34, 36, 38, 41, 43,
54  46, 48, 51, 55, 58, 61, 65, 69, 73, 77,
55  82, 87, 92, 97, 103, 110, 116, 123, 130, 138,
56  146, 155, 164, 174, 184, 195, 207, 220, 233, 246,
57  261, 277, 293, 311, 329, 349, 369, 391, 415, 440,
58  466, 493, 523, 554, 587, 622, 659, 698, 739, 783,
59  830, 880, 932, 987, 1046, 1108, 1174, 1244, 1318, 1396,
60  1479, 1567, 1661, 1760, 1864, 1975, 2093, 2217, 2349, 2489,
61  2637, 2793, 2959, 3135, 3322, 3520, 3729, 3951, 4186, 4434,
62  4698, 4978, 5274, 5587, 5919, 6271, 6644, 7040, 7458, 7902,
63  8372, 8869, 9397, 9956, 10548, 11175, 11839, 12543
64 };
65 
66 static struct ao2_container *ast_tone_zones;
67 
68 #define NUM_TONE_ZONE_BUCKETS 53
69 
70 /*!
71  * \note Access to this is protected by locking the ast_tone_zones container
72  */
74 
76  int fac1;
77  int init_v2_1;
78  int init_v3_1;
79  int fac2;
80  int init_v2_2;
81  int init_v3_2;
82  int modulate;
83  int duration;
84 };
85 
86 struct playtones_def {
87  int vol;
88  int reppos;
89  int nitems;
90  int interruptible;
91  struct playtones_item *items;
92 };
93 
95  int vol;
96  int v1_1;
97  int v2_1;
98  int v3_1;
99  int v1_2;
100  int v2_2;
101  int v3_2;
102  int reppos;
103  int nitems;
104  struct playtones_item *items;
105  int npos;
106  int oldnpos;
107  int pos;
108  struct ast_format *origwfmt;
109  struct ast_frame f;
110  unsigned char offset[AST_FRIENDLY_OFFSET];
111  short data[4000];
112 };
113 
114 static void playtones_release(struct ast_channel *chan, void *params)
115 {
116  struct playtones_state *ps = params;
117 
118  if (chan) {
119  ast_set_write_format(chan, ps->origwfmt);
120  }
121 
122  ao2_cleanup(ps->origwfmt);
123  ast_free(ps->items);
124 
125  ast_free(ps);
126 }
127 
128 static void *playtones_alloc(struct ast_channel *chan, void *params)
129 {
130  struct playtones_def *pd = params;
131  struct playtones_state *ps = NULL;
132 
133  if (!(ps = ast_calloc(1, sizeof(*ps)))) {
134  return NULL;
135  }
136 
137  ps->origwfmt = ao2_bump(ast_channel_writeformat(chan));
138 
140  ast_log(LOG_WARNING, "Unable to set '%s' to signed linear format (write)\n", ast_channel_name(chan));
141  playtones_release(NULL, ps);
142  ps = NULL;
143  } else {
144  ps->vol = pd->vol;
145  ps->reppos = pd->reppos;
146  ps->nitems = pd->nitems;
147  ps->items = pd->items;
148  ps->oldnpos = -1;
149  }
150 
151  /* Let interrupts interrupt :) */
152  if (pd->interruptible) {
153  ast_set_flag(ast_channel_flags(chan), AST_FLAG_WRITE_INT);
154  } else {
155  ast_clear_flag(ast_channel_flags(chan), AST_FLAG_WRITE_INT);
156  }
157 
158  return ps;
159 }
160 
161 static int playtones_generator(struct ast_channel *chan, void *data, int len, int samples)
162 {
163  struct playtones_state *ps = data;
164  struct playtones_item *pi;
165  int x;
166 
167  /* we need to prepare a frame with 16 * timelen samples as we're
168  * generating SLIN audio */
169 
170  len = samples * 2;
171  if (len > sizeof(ps->data) / 2 - 1) {
172  ast_log(LOG_WARNING, "Can't generate that much data!\n");
173  return -1;
174  }
175 
176  memset(&ps->f, 0, sizeof(ps->f));
177 
178  pi = &ps->items[ps->npos];
179 
180  if (ps->oldnpos != ps->npos) {
181  /* Load new parameters */
182  ps->v1_1 = 0;
183  ps->v2_1 = pi->init_v2_1;
184  ps->v3_1 = pi->init_v3_1;
185  ps->v1_2 = 0;
186  ps->v2_2 = pi->init_v2_2;
187  ps->v3_2 = pi->init_v3_2;
188  ps->oldnpos = ps->npos;
189  }
190 
191  for (x = 0; x < samples; x++) {
192  ps->v1_1 = ps->v2_1;
193  ps->v2_1 = ps->v3_1;
194  ps->v3_1 = (pi->fac1 * ps->v2_1 >> 15) - ps->v1_1;
195 
196  ps->v1_2 = ps->v2_2;
197  ps->v2_2 = ps->v3_2;
198  ps->v3_2 = (pi->fac2 * ps->v2_2 >> 15) - ps->v1_2;
199  if (pi->modulate) {
200  int p;
201  p = ps->v3_2 - 32768;
202  if (p < 0) {
203  p = -p;
204  }
205  p = ((p * 9) / 10) + 1;
206  ps->data[x] = (ps->v3_1 * p) >> 15;
207  } else {
208  ps->data[x] = ps->v3_1 + ps->v3_2;
209  }
210  }
211 
212  ps->f.frametype = AST_FRAME_VOICE;
214  ps->f.datalen = len;
215  ps->f.samples = samples;
216  ps->f.offset = AST_FRIENDLY_OFFSET;
217  ps->f.data.ptr = ps->data;
218 
219  if (ast_write(chan, &ps->f)) {
220  return -1;
221  }
222 
223  ps->pos += x;
224 
225  if (pi->duration && ps->pos >= pi->duration * 8) { /* item finished? */
226  ps->pos = 0; /* start new item */
227  ps->npos++;
228  if (ps->npos >= ps->nitems) { /* last item? */
229  if (ps->reppos == -1) { /* repeat set? */
230  return -1;
231  }
232  ps->npos = ps->reppos; /* redo from top */
233  }
234  }
235 
236  return 0;
237 }
238 
239 static struct ast_generator playtones = {
240  .alloc = playtones_alloc,
241  .release = playtones_release,
242  .generate = playtones_generator,
243 };
244 
245 int ast_tone_zone_part_parse(const char *s, struct ast_tone_zone_part *tone_data)
246 {
247  if (sscanf(s, "%30u+%30u/%30u", &tone_data->freq1, &tone_data->freq2,
248  &tone_data->time) == 3) {
249  /* f1+f2/time format */
250  } else if (sscanf(s, "%30u+%30u", &tone_data->freq1, &tone_data->freq2) == 2) {
251  /* f1+f2 format */
252  tone_data->time = 0;
253  } else if (sscanf(s, "%30u*%30u/%30u", &tone_data->freq1, &tone_data->freq2,
254  &tone_data->time) == 3) {
255  /* f1*f2/time format */
256  tone_data->modulate = 1;
257  } else if (sscanf(s, "%30u*%30u", &tone_data->freq1, &tone_data->freq2) == 2) {
258  /* f1*f2 format */
259  tone_data->time = 0;
260  tone_data->modulate = 1;
261  } else if (sscanf(s, "%30u/%30u", &tone_data->freq1, &tone_data->time) == 2) {
262  /* f1/time format */
263  tone_data->freq2 = 0;
264  } else if (sscanf(s, "%30u", &tone_data->freq1) == 1) {
265  /* f1 format */
266  tone_data->freq2 = 0;
267  tone_data->time = 0;
268  } else if (sscanf(s, "M%30u+M%30u/%30u", &tone_data->freq1, &tone_data->freq2,
269  &tone_data->time) == 3) {
270  /* Mf1+Mf2/time format */
271  tone_data->midinote = 1;
272  } else if (sscanf(s, "M%30u+M%30u", &tone_data->freq1, &tone_data->freq2) == 2) {
273  /* Mf1+Mf2 format */
274  tone_data->time = 0;
275  tone_data->midinote = 1;
276  } else if (sscanf(s, "M%30u*M%30u/%30u", &tone_data->freq1, &tone_data->freq2,
277  &tone_data->time) == 3) {
278  /* Mf1*Mf2/time format */
279  tone_data->modulate = 1;
280  tone_data->midinote = 1;
281  } else if (sscanf(s, "M%30u*M%30u", &tone_data->freq1, &tone_data->freq2) == 2) {
282  /* Mf1*Mf2 format */
283  tone_data->time = 0;
284  tone_data->modulate = 1;
285  tone_data->midinote = 1;
286  } else if (sscanf(s, "M%30u/%30u", &tone_data->freq1, &tone_data->time) == 2) {
287  /* Mf1/time format */
288  tone_data->freq2 = -1;
289  tone_data->midinote = 1;
290  } else if (sscanf(s, "M%30u", &tone_data->freq1) == 1) {
291  /* Mf1 format */
292  tone_data->freq2 = -1;
293  tone_data->time = 0;
294  tone_data->midinote = 1;
295  } else {
296  return -1;
297  }
298 
299  return 0;
300 }
301 
302 int ast_playtones_start(struct ast_channel *chan, int vol, const char *playlst, int interruptible)
303 {
304  char *s, *data = ast_strdupa(playlst);
305  struct playtones_def d = { vol, -1, 0, 1, NULL };
306  char *stringp;
307  char *separator;
308  static const float sample_rate = 8000.0;
309  static const float max_sample_val = 32768.0;
310 
311  if (vol < 1) {
312  d.vol = 7219; /* Default to -8db */
313  }
314 
315  d.interruptible = interruptible;
316 
317  stringp = data;
318 
319  /* check if the data is separated with '|' or with ',' by default */
320  if (strchr(stringp,'|')) {
321  separator = "|";
322  } else {
323  separator = ",";
324  }
325 
326  while ((s = strsep(&stringp, separator)) && !ast_strlen_zero(s)) {
327  struct playtones_item *new_items;
328  struct ast_tone_zone_part tone_data = {
329  .time = 0,
330  };
331 
332  s = ast_strip(s);
333  if (s[0]=='!') {
334  s++;
335  } else if (d.reppos == -1) {
336  d.reppos = d.nitems;
337  }
338 
339  if (ast_tone_zone_part_parse(s, &tone_data)) {
340  ast_log(LOG_ERROR, "Failed to parse tone part '%s'\n", s);
341  continue;
342  }
343 
344  if (tone_data.midinote) {
345  /* midi notes must be between 0 and 127 */
346  if (tone_data.freq1 <= 127) {
347  tone_data.freq1 = midi_tohz[tone_data.freq1];
348  } else {
349  tone_data.freq1 = 0;
350  }
351 
352  if (tone_data.freq2 <= 127) {
353  tone_data.freq2 = midi_tohz[tone_data.freq2];
354  } else {
355  tone_data.freq2 = 0;
356  }
357  }
358 
359  new_items = ast_realloc(d.items, (d.nitems + 1) * sizeof(*d.items));
360  if (!new_items) {
361  ast_free(d.items);
362  return -1;
363  }
364  d.items = new_items;
365 
366  d.items[d.nitems].fac1 = 2.0 * cos(2.0 * M_PI * (tone_data.freq1 / sample_rate)) * max_sample_val;
367  d.items[d.nitems].init_v2_1 = sin(-4.0 * M_PI * (tone_data.freq1 / sample_rate)) * d.vol;
368  d.items[d.nitems].init_v3_1 = sin(-2.0 * M_PI * (tone_data.freq1 / sample_rate)) * d.vol;
369 
370  d.items[d.nitems].fac2 = 2.0 * cos(2.0 * M_PI * (tone_data.freq2 / sample_rate)) * max_sample_val;
371  d.items[d.nitems].init_v2_2 = sin(-4.0 * M_PI * (tone_data.freq2 / sample_rate)) * d.vol;
372  d.items[d.nitems].init_v3_2 = sin(-2.0 * M_PI * (tone_data.freq2 / sample_rate)) * d.vol;
373 
374  d.items[d.nitems].duration = tone_data.time;
375  d.items[d.nitems].modulate = tone_data.modulate;
376 
377  d.nitems++;
378  }
379 
380  if (!d.nitems) {
381  ast_log(LOG_ERROR, "No valid tone parts\n");
382  return -1;
383  }
384 
385  if (ast_activate_generator(chan, &playtones, &d)) {
386  ast_free(d.items);
387  return -1;
388  }
389 
390  return 0;
391 }
392 
393 void ast_playtones_stop(struct ast_channel *chan)
394 {
396 }
397 
399 {
400  return ao2_container_count(ast_tone_zones);
401 }
402 
404 {
405  return ao2_iterator_init(ast_tone_zones, 0);
406 }
407 
408 /*! \brief Set global indication country
409  If no country is specified or we are unable to find the zone, then return not found */
410 static int ast_set_indication_country(const char *country)
411 {
412  struct ast_tone_zone *zone = NULL;
413 
414  if (ast_strlen_zero(country)) {
415  ast_log(LOG_WARNING, "Failed to get indication zone, country not set\n");
416  return -1;
417  }
418 
419  if (!(zone = ast_get_indication_zone(country))) {
420  ast_log(LOG_WARNING, "Failed to get indication zone: %s\n", country);
421  return -1;
422  }
423 
424  ast_log(LOG_NOTICE, "Setting default indication country to '%s'\n", country);
425 
426  ao2_lock(ast_tone_zones);
427  if (default_tone_zone) {
428  default_tone_zone = ast_tone_zone_unref(default_tone_zone);
429  }
430  default_tone_zone = ast_tone_zone_ref(zone);
431  ao2_unlock(ast_tone_zones);
432 
433  zone = ast_tone_zone_unref(zone);
434 
435  return 0;
436 }
437 
438 /*! \brief locate ast_tone_zone, given the country. if country == NULL, use the default country */
440 {
441  struct ast_tone_zone *tz = NULL;
442  struct ast_tone_zone zone_arg = {
443  .nrringcadence = 0,
444  };
445 
446  if (ast_strlen_zero(country)) {
447  ao2_lock(ast_tone_zones);
448  if (default_tone_zone) {
449  tz = ast_tone_zone_ref(default_tone_zone);
450  }
451  ao2_unlock(ast_tone_zones);
452 
453  return tz;
454  }
455 
456  ast_copy_string(zone_arg.country, country, sizeof(zone_arg.country));
457 
458  return ao2_find(ast_tone_zones, &zone_arg, OBJ_POINTER);
459 }
460 
461 struct ast_tone_zone_sound *ast_get_indication_tone(const struct ast_tone_zone *_zone, const char *indication)
462 {
463  struct ast_tone_zone_sound *ts = NULL;
464  /* _zone is const to the users of the API */
465  struct ast_tone_zone *zone = (struct ast_tone_zone *) _zone;
466 
467  /* If no zone is specified, use the default */
468  if (!zone) {
469  ao2_lock(ast_tone_zones);
470  if (default_tone_zone) {
471  zone = ast_tone_zone_ref(default_tone_zone);
472  }
473  ao2_unlock(ast_tone_zones);
474 
475  if (!zone) {
476  return NULL;
477  }
478  }
479 
480  ast_tone_zone_lock(zone);
481 
482  /* Look through list of tones in the zone searching for the right one */
483  AST_LIST_TRAVERSE(&zone->tones, ts, entry) {
484  if (!strcasecmp(ts->name, indication)) {
485  /* Increase ref count for the reference we will return */
486  ts = ast_tone_zone_sound_ref(ts);
487  break;
488  }
489  }
490 
491  ast_tone_zone_unlock(zone);
492 
493  if (!_zone)
494  zone = ast_tone_zone_unref(zone);
495 
496  return ts;
497 }
498 
499 static void ast_tone_zone_sound_destructor(void *obj)
500 {
501  struct ast_tone_zone_sound *ts = obj;
502 
503  /* Deconstify the 'const char *'s so the compiler doesn't complain. (but it's safe) */
504  if (ts->name) {
505  ast_free((char *) ts->name);
506  ts->name = NULL;
507  }
508 
509  if (ts->data) {
510  ast_free((char *) ts->data);
511  ts->data = NULL;
512  }
513 }
514 
515 /*! \brief deallocate the passed tone zone */
516 static void ast_tone_zone_destructor(void *obj)
517 {
518  struct ast_tone_zone *zone = obj;
519  struct ast_tone_zone_sound *current;
520 
521  while ((current = AST_LIST_REMOVE_HEAD(&zone->tones, entry))) {
522  current = ast_tone_zone_sound_unref(current);
523  }
524 
525  if (zone->ringcadence) {
526  ast_free(zone->ringcadence);
527  zone->ringcadence = NULL;
528  }
529 }
530 
531 /*! \brief add a new country, if country exists, it will be replaced. */
533 {
534  ao2_lock(ast_tone_zones);
535  if (!default_tone_zone) {
536  default_tone_zone = ast_tone_zone_ref(zone);
537  }
538  ao2_unlock(ast_tone_zones);
539 
540  ao2_link(ast_tone_zones, zone);
541 
542  ast_verb(5, "Registered indication country '%s'\n", zone->country);
543 
544  return 0;
545 }
546 
547 /*! \brief remove an existing country and all its indications, country must exist. */
548 static int ast_unregister_indication_country(const char *country)
549 {
550  struct ast_tone_zone *tz = NULL;
551  struct ast_tone_zone zone_arg = {
552  .nrringcadence = 0,
553  };
554 
555  ast_copy_string(zone_arg.country, country, sizeof(zone_arg.country));
556 
557  ao2_lock(ast_tone_zones);
558  tz = ao2_find(ast_tone_zones, &zone_arg, OBJ_POINTER | OBJ_UNLINK);
559  if (!tz) {
560  ao2_unlock(ast_tone_zones);
561  return -1;
562  }
563 
564  if (default_tone_zone == tz) {
565  ast_tone_zone_unref(default_tone_zone);
566  /* Get a new default, punt to the first one we find */
567  default_tone_zone = ao2_callback(ast_tone_zones, 0, NULL, NULL);
568  }
569  ao2_unlock(ast_tone_zones);
570 
571  tz = ast_tone_zone_unref(tz);
572 
573  return 0;
574 }
575 
576 /*!
577  * \note called with the tone zone locked
578  */
579 static int ast_register_indication(struct ast_tone_zone *zone, const char *indication,
580  const char *tonelist)
581 {
582  struct ast_tone_zone_sound *ts;
583 
584  if (ast_strlen_zero(indication) || ast_strlen_zero(tonelist)) {
585  return -1;
586  }
587 
589  if (!strcasecmp(indication, ts->name)) {
591  ts = ast_tone_zone_sound_unref(ts);
592  break;
593  }
594  }
596 
597  ts = ao2_alloc_options(sizeof(*ts), ast_tone_zone_sound_destructor,
599  if (!ts) {
600  return -1;
601  }
602 
603  if (!(ts->name = ast_strdup(indication)) || !(ts->data = ast_strdup(tonelist))) {
604  ts = ast_tone_zone_sound_unref(ts);
605  return -1;
606  }
607 
608  AST_LIST_INSERT_TAIL(&zone->tones, ts, entry); /* Inherit reference */
609 
610  return 0;
611 }
612 
613 /*! \brief remove an existing country's indication. Both country and indication must exist */
614 static int ast_unregister_indication(struct ast_tone_zone *zone, const char *indication)
615 {
616  struct ast_tone_zone_sound *ts;
617  int res = -1;
618 
619  ast_tone_zone_lock(zone);
620 
622  if (!strcasecmp(indication, ts->name)) {
624  ts = ast_tone_zone_sound_unref(ts);
625  res = 0;
626  break;
627  }
628  }
630 
631  ast_tone_zone_unlock(zone);
632 
633  return res;
634 }
635 
636 static struct ast_tone_zone *ast_tone_zone_alloc(void)
637 {
638  return ao2_alloc(sizeof(struct ast_tone_zone), ast_tone_zone_destructor);
639 }
640 
641 static char *complete_country(struct ast_cli_args *a)
642 {
643  struct ao2_iterator i;
644  size_t wordlen;
645  struct ast_tone_zone *tz;
646 
647  wordlen = strlen(a->word);
648 
649  i = ao2_iterator_init(ast_tone_zones, 0);
650  while ((tz = ao2_iterator_next(&i))) {
651  if (!strncasecmp(a->word, tz->country, wordlen)) {
654  break;
655  }
656  }
658  }
660 
661  return NULL;
662 }
663 
664 static char *handle_cli_indication_add(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
665 {
666  struct ast_tone_zone *tz;
667  int created_country = 0;
668  char *res = CLI_SUCCESS;
669 
670  switch (cmd) {
671  case CLI_INIT:
672  e->command = "indication add";
673  e->usage =
674  "Usage: indication add <country> <indication> \"<tonelist>\"\n"
675  " Add the given indication to the country.\n";
676  return NULL;
677  case CLI_GENERATE:
678  if (a->pos == 2) {
679  return complete_country(a);
680  } else {
681  return NULL;
682  }
683  }
684 
685  if (a->argc != 5) {
686  return CLI_SHOWUSAGE;
687  }
688 
689  if (!(tz = ast_get_indication_zone(a->argv[2]))) {
690  /* country does not exist, create it */
691  ast_log(LOG_NOTICE, "Country '%s' does not exist, creating it.\n", a->argv[2]);
692 
693  if (!(tz = ast_tone_zone_alloc())) {
694  return CLI_FAILURE;
695  }
696 
697  ast_copy_string(tz->country, a->argv[2], sizeof(tz->country));
698 
700  ast_log(LOG_WARNING, "Unable to register new country\n");
701  tz = ast_tone_zone_unref(tz);
702  return CLI_FAILURE;
703  }
704 
705  created_country = 1;
706  }
707 
708  ast_tone_zone_lock(tz);
709 
710  if (ast_register_indication(tz, a->argv[3], a->argv[4])) {
711  if (ast_strlen_zero(a->argv[3])) {
712  ast_log(LOG_WARNING, "Unable to register indication %s\n", a->argv[2]);
713  } else {
714  ast_log(LOG_WARNING, "Unable to register indication %s/%s\n", a->argv[2], a->argv[3]);
715  }
716  if (created_country) {
718  }
719  res = CLI_FAILURE;
720  }
721 
723 
724  tz = ast_tone_zone_unref(tz);
725 
726  return res;
727 }
728 
729 static char *complete_indications(struct ast_cli_args *a)
730 {
731  size_t wordlen;
732  struct ast_tone_zone_sound *ts;
733  struct ast_tone_zone *tz;
734  struct ast_tone_zone tmp_tz = {
735  .nrringcadence = 0,
736  };
737 
738  ast_copy_string(tmp_tz.country, a->argv[a->pos - 1], sizeof(tmp_tz.country));
739 
740  tz = ao2_find(ast_tone_zones, &tmp_tz, OBJ_POINTER);
741  if (!tz) {
742  return NULL;
743  }
744 
745  wordlen = strlen(a->word);
746 
747  ast_tone_zone_lock(tz);
748  AST_LIST_TRAVERSE(&tz->tones, ts, entry) {
749  if (!strncasecmp(a->word, ts->name, wordlen)) {
751  break;
752  }
753  }
754  }
756 
757  tz = ast_tone_zone_unref(tz);
758 
759  return NULL;
760 }
761 
762 static char *handle_cli_indication_remove(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
763 {
764  struct ast_tone_zone *tz;
765  char *res = CLI_SUCCESS;
766 
767  switch (cmd) {
768  case CLI_INIT:
769  e->command = "indication remove";
770  e->usage =
771  "Usage: indication remove <country> [indication]\n"
772  " Remove the given indication from the country.\n";
773  return NULL;
774  case CLI_GENERATE:
775  if (a->pos == 2) {
776  return complete_country(a);
777  }
778  if (a->pos == 3) {
779  return complete_indications(a);
780  }
781  return NULL;
782  }
783 
784  if (a->argc != 3 && a->argc != 4) {
785  return CLI_SHOWUSAGE;
786  }
787 
788  if (a->argc == 3) {
789  /* remove entire country */
790  if (ast_unregister_indication_country(a->argv[2])) {
791  ast_log(LOG_WARNING, "Unable to unregister indication country %s\n", a->argv[2]);
792  return CLI_FAILURE;
793  }
794 
795  return CLI_SUCCESS;
796  }
797 
798  if (!(tz = ast_get_indication_zone(a->argv[2]))) {
799  ast_log(LOG_WARNING, "Unable to unregister indication %s/%s, country does not exists\n", a->argv[2], a->argv[3]);
800  return CLI_FAILURE;
801  }
802 
803  if (ast_unregister_indication(tz, a->argv[3])) {
804  ast_log(LOG_WARNING, "Unable to unregister indication %s/%s\n", a->argv[2], a->argv[3]);
805  res = CLI_FAILURE;
806  }
807 
808  tz = ast_tone_zone_unref(tz);
809 
810  return res;
811 }
812 
813 static char *handle_cli_indication_show(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
814 {
815  struct ast_tone_zone *tz = NULL;
816  struct ast_str *buf;
817  int found_country = 0;
818  int i;
819 
820  switch (cmd) {
821  case CLI_INIT:
822  e->command = "indication show";
823  e->usage =
824  "Usage: indication show [<country> ...]\n"
825  " Display either a condensed summary of all countries and indications, or a\n"
826  " more verbose list of indications for the specified countries.\n";
827  return NULL;
828  case CLI_GENERATE:
829  return complete_country(a);
830  }
831 
832  if (a->argc == 2) {
833  struct ao2_iterator iter;
834  /* no arguments, show a list of countries */
835  ast_cli(a->fd, "Country Description\n");
836  ast_cli(a->fd, "===========================\n");
838  while ((tz = ao2_iterator_next(&iter))) {
839  ast_tone_zone_lock(tz);
840  ast_cli(a->fd, "%-7.7s %s\n", tz->country, tz->description);
842  tz = ast_tone_zone_unref(tz);
843  }
844  ao2_iterator_destroy(&iter);
845 
846  ao2_lock(ast_tone_zones);
847  if (default_tone_zone) {
848  ast_cli(a->fd, "===========================\n");
849  tz = ast_tone_zone_ref(default_tone_zone);
850  ast_cli(a->fd, "Default tone zone: %s\n", tz->country);
852  }
853  ao2_unlock(ast_tone_zones);
854  return CLI_SUCCESS;
855  }
856 
857  buf = ast_str_alloca(256);
858 
859  for (i = 2; i < a->argc; i++) {
860  struct ast_tone_zone zone_arg = {
861  .nrringcadence = 0,
862  };
863  struct ast_tone_zone_sound *ts;
864  int j;
865 
866  ast_copy_string(zone_arg.country, a->argv[i], sizeof(zone_arg.country));
867 
868  if (!(tz = ao2_find(ast_tone_zones, &zone_arg, OBJ_POINTER))) {
869  continue;
870  }
871 
872  if (!found_country) {
873  found_country = 1;
874  ast_cli(a->fd, "Country Indication PlayList\n");
875  ast_cli(a->fd, "=====================================\n");
876  }
877 
878  ast_tone_zone_lock(tz);
879 
880  ast_str_set(&buf, 0, "%-7.7s %-15.15s ", tz->country, "<ringcadence>");
881  for (j = 0; j < tz->nrringcadence; j++) {
882  ast_str_append(&buf, 0, "%d%s", tz->ringcadence[j],
883  (j == tz->nrringcadence - 1) ? "" : ",");
884  }
885  ast_str_append(&buf, 0, "\n");
886  ast_cli(a->fd, "%s", ast_str_buffer(buf));
887 
888  AST_LIST_TRAVERSE(&tz->tones, ts, entry) {
889  ast_cli(a->fd, "%-7.7s %-15.15s %s\n", tz->country, ts->name, ts->data);
890  }
891 
893  tz = ast_tone_zone_unref(tz);
894  }
895 
896  if (!found_country) {
897  ast_cli(a->fd, "No countries matched your criteria.\n");
898  }
899 
900  return CLI_SUCCESS;
901 }
902 
903 static int is_valid_tone_zone(struct ast_tone_zone *zone)
904 {
905  int res;
906 
907  ast_tone_zone_lock(zone);
908  res = (!ast_strlen_zero(zone->description) && !AST_LIST_EMPTY(&zone->tones));
909  ast_tone_zone_unlock(zone);
910 
911  return res;
912 }
913 
914 /*!\brief
915  *
916  * \note This is called with the tone zone locked.
917  */
918 static void store_tone_zone_ring_cadence(struct ast_tone_zone *zone, const char *val)
919 {
920  char buf[1024];
921  char *ring, *c = buf;
922 
923  ast_copy_string(buf, val, sizeof(buf));
924 
925  while ((ring = strsep(&c, ","))) {
926  int *tmp, value;
927 
928  ring = ast_strip(ring);
929 
930  if (!isdigit(ring[0]) || (value = atoi(ring)) == -1) {
931  ast_log(LOG_WARNING, "Invalid ringcadence given '%s'.\n", ring);
932  continue;
933  }
934 
935  if (!(tmp = ast_realloc(zone->ringcadence, (zone->nrringcadence + 1) * sizeof(int)))) {
936  return;
937  }
938 
939  zone->ringcadence = tmp;
940  tmp[zone->nrringcadence] = value;
941  zone->nrringcadence++;
942  }
943 }
944 
945 static void store_config_tone_zone(struct ast_tone_zone *zone, const char *var,
946  const char *value)
947 {
948  CV_START(var, value);
949 
950  CV_STR("description", zone->description);
951  CV_F("ringcadence", store_tone_zone_ring_cadence(zone, value));
952 
953  ast_register_indication(zone, var, value);
954 
955  CV_END;
956 }
957 
958 static void reset_tone_zone(struct ast_tone_zone *zone)
959 {
960  ast_tone_zone_lock(zone);
961 
962  zone->killme = 0;
963 
964  if (zone->nrringcadence) {
965  zone->nrringcadence = 0;
966  ast_free(zone->ringcadence);
967  zone->ringcadence = NULL;
968  }
969 
970  ast_tone_zone_unlock(zone);
971 }
972 
973 static int parse_tone_zone(struct ast_config *cfg, const char *country)
974 {
975  struct ast_variable *v;
976  struct ast_tone_zone *zone;
977  struct ast_tone_zone tmp_zone = {
978  .nrringcadence = 0,
979  };
980  int allocd = 0;
981 
982  ast_copy_string(tmp_zone.country, country, sizeof(tmp_zone.country));
983 
984  if ((zone = ao2_find(ast_tone_zones, &tmp_zone, OBJ_POINTER))) {
985  reset_tone_zone(zone);
986  } else if ((zone = ast_tone_zone_alloc())) {
987  allocd = 1;
988  ast_copy_string(zone->country, country, sizeof(zone->country));
989  } else {
990  return -1;
991  }
992 
993  ast_tone_zone_lock(zone);
994  for (v = ast_variable_browse(cfg, country); v; v = v->next) {
995  store_config_tone_zone(zone, v->name, v->value);
996  }
997  ast_tone_zone_unlock(zone);
998 
999  if (allocd) {
1000  if (!is_valid_tone_zone(zone)) {
1001  ast_log(LOG_WARNING, "Indication country '%s' is invalid\n", country);
1002  } else if (ast_register_indication_country(zone)) {
1003  ast_log(LOG_WARNING, "Unable to register indication country '%s'.\n",
1004  country);
1005  }
1006  }
1007 
1008  zone = ast_tone_zone_unref(zone);
1009 
1010  return 0;
1011 }
1012 
1013 /*! \brief
1014  * Mark the zone and its tones before parsing configuration. We will use this
1015  * to know what to remove after configuration is parsed.
1016  */
1017 static int tone_zone_mark(void *obj, void *arg, int flags)
1018 {
1019  struct ast_tone_zone *zone = obj;
1020  struct ast_tone_zone_sound *s;
1021 
1022  ast_tone_zone_lock(zone);
1023 
1024  zone->killme = 1;
1025 
1026  AST_LIST_TRAVERSE(&zone->tones, s, entry) {
1027  s->killme = 1;
1028  }
1029 
1030  ast_tone_zone_unlock(zone);
1031 
1032  return 0;
1033 }
1034 
1035 /*! \brief
1036  * Prune tones no longer in the configuration, and have the tone zone unlinked
1037  * if it is no longer in the configuration at all.
1038  */
1039 static int prune_tone_zone(void *obj, void *arg, int flags)
1040 {
1041  struct ast_tone_zone *zone = obj;
1042  struct ast_tone_zone_sound *s;
1043 
1044  ast_tone_zone_lock(zone);
1045 
1047  if (s->killme) {
1050  }
1051  }
1053 
1054  ast_tone_zone_unlock(zone);
1055 
1056  return zone->killme ? CMP_MATCH : 0;
1057 }
1058 
1059 /*! \brief load indications module */
1060 static int load_indications(int reload)
1061 {
1062  struct ast_config *cfg;
1063  const char *cxt = NULL;
1064  const char *country = NULL;
1065  struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
1066  int res = -1;
1067 
1068  cfg = ast_config_load2(config, "indications", config_flags);
1069 
1070  if (cfg == CONFIG_STATUS_FILEMISSING || cfg == CONFIG_STATUS_FILEINVALID) {
1071  ast_log(LOG_WARNING, "Can't find indications config file %s.\n", config);
1072  return 0;
1073  } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
1074  return 0;
1075  }
1076 
1077  /* Lock the container to prevent multiple simultaneous reloads */
1078  ao2_lock(ast_tone_zones);
1079 
1080  ao2_callback(ast_tone_zones, OBJ_NODATA, tone_zone_mark, NULL);
1081 
1082  /* Use existing config to populate the Indication table */
1083  while ((cxt = ast_category_browse(cfg, cxt))) {
1084  /* All categories but "general" are considered countries */
1085  if (!strcasecmp(cxt, "general")) {
1086  continue;
1087  }
1088 
1089  if (parse_tone_zone(cfg, cxt)) {
1090  goto return_cleanup;
1091  }
1092  }
1093 
1094  ao2_callback(ast_tone_zones, OBJ_NODATA | OBJ_MULTIPLE | OBJ_UNLINK,
1095  prune_tone_zone, NULL);
1096 
1097  /* determine which country is the default */
1098  country = ast_variable_retrieve(cfg, "general", "country");
1099  if (!ast_strlen_zero(country)) {
1100  ast_log(LOG_NOTICE, "Default country for indication tones: %s\n", country);
1101  if (ast_set_indication_country(country)) {
1102  ast_log(LOG_WARNING, "Unable to set the default country (for indication tones)\n");
1103  }
1104  } else {
1105  ast_log(LOG_WARNING, "Missing default country (for indication tones)\n");
1106  }
1107 
1108  res = 0;
1109 
1110 return_cleanup:
1111  ao2_unlock(ast_tone_zones);
1112  ast_config_destroy(cfg);
1113 
1114  return res;
1115 }
1116 
1117 /*! \brief CLI entries for commands provided by this module */
1118 static struct ast_cli_entry cli_indications[] = {
1119  AST_CLI_DEFINE(handle_cli_indication_add, "Add the given indication to the country"),
1120  AST_CLI_DEFINE(handle_cli_indication_remove, "Remove the given indication from the country"),
1121  AST_CLI_DEFINE(handle_cli_indication_show, "Display a list of all countries/indications")
1122 };
1123 
1124 static int ast_tone_zone_hash(const void *obj, const int flags)
1125 {
1126  const struct ast_tone_zone *zone = obj;
1127 
1128  return ast_str_case_hash(zone->country);
1129 }
1130 
1131 static int ast_tone_zone_cmp(void *obj, void *arg, int flags)
1132 {
1133  struct ast_tone_zone *zone = obj;
1134  struct ast_tone_zone *zone_arg = arg;
1135 
1136  return (!strcasecmp(zone->country, zone_arg->country)) ?
1137  CMP_MATCH | CMP_STOP : 0;
1138 }
1139 
1140 /*!
1141  * \internal
1142  * \brief Clean up resources on Asterisk shutdown
1143  */
1144 static int unload_module(void)
1145 {
1146  ast_cli_unregister_multiple(cli_indications, ARRAY_LEN(cli_indications));
1147  if (default_tone_zone) {
1148  ast_tone_zone_unref(default_tone_zone);
1149  default_tone_zone = NULL;
1150  }
1151  if (ast_tone_zones) {
1152  ao2_ref(ast_tone_zones, -1);
1153  ast_tone_zones = NULL;
1154  }
1155 
1156  return 0;
1157 }
1158 
1159 /*! \brief Load indications module */
1160 static int load_module(void)
1161 {
1163  NUM_TONE_ZONE_BUCKETS, ast_tone_zone_hash, NULL, ast_tone_zone_cmp);
1164  if (!ast_tone_zones) {
1165  return AST_MODULE_LOAD_FAILURE;
1166  }
1167 
1168  if (load_indications(0)) {
1169  return AST_MODULE_LOAD_FAILURE;
1170  }
1171 
1172  ast_cli_register_multiple(cli_indications, ARRAY_LEN(cli_indications));
1173 
1174  return AST_MODULE_LOAD_SUCCESS;
1175 }
1176 
1177 /*! \brief Reload indications module */
1178 static int reload_module(void)
1179 {
1180  return load_indications(1);
1181 }
1182 
1183 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS | AST_MODFLAG_LOAD_ORDER, "Indication Tone Handling",
1184  .support_level = AST_MODULE_SUPPORT_CORE,
1185  .load = load_module,
1186  .unload = unload_module,
1187  .reload = reload_module,
1188  .load_pri = AST_MODPRI_CORE,
1189  .requires = "extconfig",
1190 );
struct ast_variable * next
Tone Indication Support.
Main Channel structure associated with a channel.
Asterisk locking-related definitions:
Asterisk main include file. File version handling, generic pbx functions.
#define ast_realloc(p, len)
A wrapper for realloc()
Definition: astmm.h:226
int ao2_container_count(struct ao2_container *c)
Returns the number of elements in a container.
char description[40]
Text description of the given country.
Definition: indications.h:82
static struct ast_tone_zone * ast_tone_zone_unref(struct ast_tone_zone *tz)
Release a reference to an ast_tone_zone.
Definition: indications.h:205
int ast_cli_unregister_multiple(struct ast_cli_entry *e, int len)
Unregister multiple commands.
Definition: clicompat.c:30
char country[MAX_TONEZONE_COUNTRY]
Country code that this set of tones is for.
Definition: indications.h:76
static struct ast_tone_zone * default_tone_zone
Definition: indications.c:73
int ast_activate_generator(struct ast_channel *chan, struct ast_generator *gen, void *params)
Definition: channel.c:2951
#define OBJ_POINTER
Definition: astobj2.h:1150
descriptor for a cli entry.
Definition: cli.h:171
char * ast_str_buffer(const struct ast_str *buf)
Returns the string buffer within the ast_str buf.
Definition: strings.h:761
#define ast_tone_zone_unlock(tz)
Unlock an ast_tone_zone.
Definition: indications.h:193
#define ao2_callback(c, flags, cb_fn, arg)
ao2_callback() is a generic function that applies cb_fn() to all objects in a container, as described below.
Definition: astobj2.h:1693
A description of a part of a tone.
Definition: indications.h:109
int ast_tone_zone_part_parse(const char *s, struct ast_tone_zone_part *tone_data)
Parse a tone part.
Definition: indications.c:245
static int reload_module(void)
Reload indications module.
Definition: indications.c:1178
struct ast_config * ast_config_load2(const char *filename, const char *who_asked, struct ast_flags flags)
Load a config file.
Definition: main/config.c:3321
Structure for variables, used for configurations and for channel variables.
static int load_module(void)
Load indications module.
Definition: indications.c:1160
static int prune_tone_zone(void *obj, void *arg, int flags)
Prune tones no longer in the configuration, and have the tone zone unlinked if it is no longer in the...
Definition: indications.c:1039
Definition of a media format.
Definition: format.c:43
int ast_str_append(struct ast_str **buf, ssize_t max_len, const char *fmt,...)
Append to a thread local dynamic string.
Definition: strings.h:1139
#define ast_cli_register_multiple(e, len)
Register multiple commands.
Definition: cli.h:265
void ao2_iterator_destroy(struct ao2_iterator *iter)
Destroy a container iterator.
#define AST_LIST_EMPTY(head)
Checks whether the specified list contains any entries.
Definition: linkedlists.h:450
static int ast_unregister_indication(struct ast_tone_zone *zone, const char *indication)
remove an existing country's indication. Both country and indication must exist
Definition: indications.c:614
#define ast_strdup(str)
A wrapper for strdup()
Definition: astmm.h:241
char * ast_category_browse(struct ast_config *config, const char *prev_name)
Browse categories.
Definition: extconf.c:3326
#define CV_END
close a variable parsing block
static int ast_register_indication(struct ast_tone_zone *zone, const char *indication, const char *tonelist)
Definition: indications.c:579
#define CV_START(__in_var, __in_val)
the macro to open a block for variable parsing
#define AST_LIST_TRAVERSE_SAFE_END
Closes a safe loop traversal block.
Definition: linkedlists.h:615
struct ast_frame_subclass subclass
Utility functions.
static int tone_zone_mark(void *obj, void *arg, int flags)
Mark the zone and its tones before parsing configuration. We will use this to know what to remove aft...
Definition: indications.c:1017
#define ao2_bump(obj)
Bump refcount on an AO2 object by one, returning the object.
Definition: astobj2.h:480
int ast_str_set(struct ast_str **buf, ssize_t max_len, const char *fmt,...)
Set a dynamic string using variable arguments.
Definition: strings.h:1113
#define CV_F(__pattern, __body)
call a generic function if the name matches.
static int ast_register_indication_country(struct ast_tone_zone *zone)
add a new country, if country exists, it will be replaced.
Definition: indications.c:532
General Asterisk PBX channel definitions.
#define AST_FRIENDLY_OFFSET
Offset into a frame's data buffer.
A set of tones for a given locale.
Definition: indications.h:74
#define ast_strdupa(s)
duplicate a string in memory from the stack
Definition: astmm.h:298
#define ao2_ref(o, delta)
Reference/unreference an object and return the old refcount.
Definition: astobj2.h:459
static void ast_tone_zone_destructor(void *obj)
deallocate the passed tone zone
Definition: indications.c:516
char * ast_strip(char *s)
Strip leading/trailing whitespace from a string.
Definition: strings.h:223
static struct ast_cli_entry cli_indications[]
CLI entries for commands provided by this module.
Definition: indications.c:1118
#define AST_LIST_REMOVE_CURRENT(field)
Removes the current entry from a list during a traversal.
Definition: linkedlists.h:557
Asterisk internal frame definitions.
static struct ast_tone_zone_sound * ast_tone_zone_sound_unref(struct ast_tone_zone_sound *ts)
Release a reference to an ast_tone_zone_sound.
Definition: indications.h:227
A set of macros to manage forward-linked lists.
int ast_set_write_format(struct ast_channel *chan, struct ast_format *format)
Sets write format on channel chan.
Definition: channel.c:5803
#define AST_LIST_REMOVE_HEAD(head, field)
Removes and returns the head entry from a list.
Definition: linkedlists.h:833
void ast_playtones_stop(struct ast_channel *chan)
Stop playing tones on a channel.
Definition: indications.c:393
int ast_playtones_start(struct ast_channel *chan, int vol, const char *playlst, int interruptible)
Start playing a list of tones on a channel.
Definition: indications.c:302
const char * name
Name of the tone. For example, "busy".
Definition: indications.h:37
#define AST_LIST_INSERT_TAIL(head, elm, field)
Appends a list entry to the tail of a list.
Definition: linkedlists.h:731
#define ao2_container_alloc_hash(ao2_options, container_options, n_buckets, hash_fn, sort_fn, cmp_fn)
Allocate and initialize a hash container with the desired number of buckets.
Definition: astobj2.h:1303
Support for dynamic strings.
Definition: strings.h:623
static struct ast_tone_zone_sound * ast_tone_zone_sound_ref(struct ast_tone_zone_sound *ts)
Increase the reference count on an ast_tone_zone_sound.
Definition: indications.h:238
Description of a tone.
Definition: indications.h:35
static struct ast_tone_zone * ast_tone_zone_ref(struct ast_tone_zone *tz)
Increase the reference count on an ast_tone_zone.
Definition: indications.h:216
#define AST_LIST_TRAVERSE(head, var, field)
Loops over (traverses) the entries in a list.
Definition: linkedlists.h:491
union ast_frame::@224 data
char * command
Definition: cli.h:186
struct ao2_iterator ast_tone_zone_iterator_init(void)
Get an iterator for the available tone zones.
Definition: indications.c:403
#define ast_calloc(num, len)
A wrapper for calloc()
Definition: astmm.h:202
int ast_tone_zone_count(void)
Get the number of registered tone zones.
Definition: indications.c:398
Module could not be loaded properly.
Definition: module.h:102
int ast_write(struct ast_channel *chan, struct ast_frame *frame)
Write a frame to a channel This function writes the given frame to the indicated channel.
Definition: channel.c:5144
Prototypes for public functions only of internal interest,.
Structure used to handle boolean flags.
Definition: utils.h:199
int * ringcadence
Array of ring cadence parts.
Definition: indications.h:91
const char * usage
Definition: cli.h:177
struct ast_tone_zone * ast_get_indication_zone(const char *country)
locate ast_tone_zone, given the country. if country == NULL, use the default country ...
Definition: indications.c:439
static int load_indications(int reload)
load indications module
Definition: indications.c:1060
void ast_deactivate_generator(struct ast_channel *chan)
Definition: channel.c:2893
When we need to walk through a container, we use an ao2_iterator to keep track of the current positio...
Definition: astobj2.h:1821
static int ast_set_indication_country(const char *country)
Set global indication country If no country is specified or we are unable to find the zone...
Definition: indications.c:410
Standard Command Line Interface.
void ast_copy_string(char *dst, const char *src, size_t size)
Size-limited null-terminating string copy.
Definition: strings.h:425
unsigned int nrringcadence
Number of ring cadence elements in the ringcadence array.
Definition: indications.h:84
Data structure associated with a single frame of data.
Definition: search.h:40
const char * data
Description of a tone.
Definition: indications.h:52
#define ast_tone_zone_lock(tz)
Lock an ast_tone_zone.
Definition: indications.h:188
#define AST_LIST_TRAVERSE_SAFE_BEGIN(head, var, field)
Loops safely over (traverses) the entries in a list.
Definition: linkedlists.h:529
enum ast_frame_type frametype
Generic container type.
struct ast_format * format
struct ast_tone_zone_sound * ast_get_indication_tone(const struct ast_tone_zone *_zone, const char *indication)
Locate a tone zone sound.
Definition: indications.c:461
void ast_config_destroy(struct ast_config *cfg)
Destroys a config.
Definition: extconf.c:1289
int ast_cli_completion_add(char *value)
Add a result to a request for completion options.
Definition: main/cli.c:2761
static void store_tone_zone_ring_cadence(struct ast_tone_zone *zone, const char *val)
Definition: indications.c:918
#define ASTERISK_GPL_KEY
The text the key() function should return.
Definition: module.h:46
struct ast_format * ast_format_slin
Built-in cached signed linear 8kHz format.
Definition: format_cache.c:41
Asterisk module definitions.
struct ao2_iterator ao2_iterator_init(struct ao2_container *c, int flags) attribute_warn_unused_result
Create an iterator for a container.
struct ast_tone_zone::@232 tones
A list of tones for this locale.
static int ast_unregister_indication_country(const char *country)
remove an existing country and all its indications, country must exist.
Definition: indications.c:548
static force_inline int attribute_pure ast_str_case_hash(const char *str)
Compute a hash value on a case-insensitive string.
Definition: strings.h:1303
Media Format Cache API.
#define ao2_link(container, obj)
Add an object to a container.
Definition: astobj2.h:1532