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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2002, Pauline Middelink
*
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Tone Management
*
* \author Pauline Middelink <middelink@polyware.nl>
*
* This set of function allow us to play a list of tones on a channel.
* Each element has two frequencies, which are mixed together and a
* duration. For silence both frequencies can be set to 0.
* The playtones can be given as a comma separated string.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h> /* For PI */
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
#include "asterisk/indications.h"
#include "asterisk/frame.h"
#include "asterisk/options.h"
#include "asterisk/channel.h"
#include "asterisk/logger.h"
#include "asterisk/lock.h"
#include "asterisk/utils.h"
static int midi_tohz[128] = {
8,8,9,9,10,10,11,12,12,13,14,
15,16,17,18,19,20,21,23,24,25,
27,29,30,32,34,36,38,41,43,46,
48,51,55,58,61,65,69,73,77,82,
87,92,97,103,110,116,123,130,138,146,
155,164,174,184,195,207,220,233,246,261,
277,293,311,329,349,369,391,415,440,466,
493,523,554,587,622,659,698,739,783,830,
880,932,987,1046,1108,1174,1244,1318,1396,1479,
1567,1661,1760,1864,1975,2093,2217,2349,2489,2637,
2793,2959,3135,3322,3520,3729,3951,4186,4434,4698,
4978,5274,5587,5919,6271,6644,7040,7458,7902,8372,
8869,9397,9956,10548,11175,11839,12543
};
struct playtones_item {
int fac1;
int init_v2_1;
int init_v3_1;
int fac2;
int init_v2_2;
int init_v3_2;
int modulate;
int duration;
};
struct playtones_def {
int vol;
int reppos;
int nitems;
int interruptible;
struct playtones_item *items;
};
struct playtones_state {
int vol;
int v1_1;
int v2_1;
int v3_1;
int v1_2;
int v2_2;
int v3_2;
int reppos;
int nitems;
struct playtones_item *items;
int npos;
int oldnpos;
int pos;
int origwfmt;
struct ast_frame f;
unsigned char offset[AST_FRIENDLY_OFFSET];
short data[4000];
};
static void playtones_release(struct ast_channel *chan, void *params)
{
struct playtones_state *ps = params;
if (chan) {
ast_set_write_format(chan, ps->origwfmt);
}
if (ps->items) free(ps->items);
free(ps);
}
static void * playtones_alloc(struct ast_channel *chan, void *params)
{
struct playtones_def *pd = params;
struct playtones_state *ps = malloc(sizeof(struct playtones_state));
if (!ps)
return NULL;
memset(ps, 0, sizeof(struct playtones_state));
ps->origwfmt = chan->writeformat;
if (ast_set_write_format(chan, AST_FORMAT_SLINEAR)) {
ast_log(LOG_WARNING, "Unable to set '%s' to signed linear format (write)\n", chan->name);
playtones_release(NULL, ps);
ps = NULL;
} else {
ps->vol = pd->vol;
ps->reppos = pd->reppos;
ps->nitems = pd->nitems;
ps->items = pd->items;
ps->oldnpos = -1;
}
/* Let interrupts interrupt :) */
if (pd->interruptible)
ast_set_flag(chan, AST_FLAG_WRITE_INT);
else
ast_clear_flag(chan, AST_FLAG_WRITE_INT);
return ps;
}
static int playtones_generator(struct ast_channel *chan, void *data, int len, int samples)
{
struct playtones_state *ps = data;
struct playtones_item *pi;
int x;
/* we need to prepare a frame with 16 * timelen samples as we're
* generating SLIN audio
*/
len = samples * 2;
if (len > sizeof(ps->data) / 2 - 1) {
ast_log(LOG_WARNING, "Can't generate that much data!\n");
return -1;
}
memset(&ps->f, 0, sizeof(ps->f));
pi = &ps->items[ps->npos];
if (ps->oldnpos != ps->npos) {
/* Load new parameters */
ps->v1_1 = 0;
ps->v2_1 = pi->init_v2_1;
ps->v3_1 = pi->init_v3_1;
ps->v1_2 = 0;
ps->v2_2 = pi->init_v2_2;
ps->v3_2 = pi->init_v3_2;
ps->oldnpos = ps->npos;
}
for (x=0;x<len/2;x++) {
ps->v1_1 = ps->v2_1;
ps->v2_1 = ps->v3_1;
ps->v3_1 = (pi->fac1 * ps->v2_1 >> 15) - ps->v1_1;
ps->v1_2 = ps->v2_2;
ps->v2_2 = ps->v3_2;
ps->v3_2 = (pi->fac2 * ps->v2_2 >> 15) - ps->v1_2;
if (pi->modulate) {
int p;
p = ps->v3_2 - 32768;
if (p < 0) p = -p;
p = ((p * 9) / 10) + 1;
ps->data[x] = (ps->v3_1 * p) >> 15;
} else
ps->data[x] = ps->v3_1 + ps->v3_2;
}
ps->f.frametype = AST_FRAME_VOICE;
ps->f.subclass = AST_FORMAT_SLINEAR;
ps->f.datalen = len;
ps->f.samples = samples;
ps->f.offset = AST_FRIENDLY_OFFSET;
ps->f.data = ps->data;
ps->f.delivery.tv_sec = 0;
ps->f.delivery.tv_usec = 0;
ast_write(chan, &ps->f);
ps->pos += x;
if (pi->duration && ps->pos >= pi->duration * 8) { /* item finished? */
ps->pos = 0; /* start new item */
ps->npos++;
if (ps->npos >= ps->nitems) { /* last item? */
if (ps->reppos == -1) /* repeat set? */
return -1;
ps->npos = ps->reppos; /* redo from top */
}
}
return 0;
}
static struct ast_generator playtones = {
alloc: playtones_alloc,
release: playtones_release,
generate: playtones_generator,
};
int ast_playtones_start(struct ast_channel *chan, int vol, const char *playlst, int interruptible)
{
char *s, *data = ast_strdupa(playlst); /* cute */
struct playtones_def d = { vol, -1, 0, 1, NULL};
char *stringp=NULL;
char *separator;
if (!data)
return -1;
if (vol < 1)
d.vol = 7219; /* Default to -8db */
d.interruptible = interruptible;
stringp=data;
/* the stringp/data is not null here */
/* check if the data is separated with '|' or with ',' by default */
if (strchr(stringp,'|'))
separator = "|";
else
separator = ",";
s = strsep(&stringp,separator);
while (s && *s) {
int freq1, freq2, time, modulate=0, midinote=0;
if (s[0]=='!')
s++;
else if (d.reppos == -1)
d.reppos = d.nitems;
if (sscanf(s, "%d+%d/%d", &freq1, &freq2, &time) == 3) {
/* f1+f2/time format */
} else if (sscanf(s, "%d+%d", &freq1, &freq2) == 2) {
/* f1+f2 format */
time = 0;
} else if (sscanf(s, "%d*%d/%d", &freq1, &freq2, &time) == 3) {
/* f1*f2/time format */
modulate = 1;
} else if (sscanf(s, "%d*%d", &freq1, &freq2) == 2) {
/* f1*f2 format */
time = 0;
modulate = 1;
} else if (sscanf(s, "%d/%d", &freq1, &time) == 2) {
/* f1/time format */
freq2 = 0;
} else if (sscanf(s, "%d", &freq1) == 1) {
/* f1 format */
freq2 = 0;
time = 0;
} else if (sscanf(s, "M%d+M%d/%d", &freq1, &freq2, &time) == 3) {
/* Mf1+Mf2/time format */
midinote = 1;
} else if (sscanf(s, "M%d+M%d", &freq1, &freq2) == 2) {
/* Mf1+Mf2 format */
time = 0;
midinote = 1;
} else if (sscanf(s, "M%d*M%d/%d", &freq1, &freq2, &time) == 3) {
/* Mf1*Mf2/time format */
modulate = 1;
midinote = 1;
} else if (sscanf(s, "M%d*M%d", &freq1, &freq2) == 2) {
/* Mf1*Mf2 format */
time = 0;
modulate = 1;
midinote = 1;
} else if (sscanf(s, "M%d/%d", &freq1, &time) == 2) {
/* Mf1/time format */
freq2 = -1;
midinote = 1;
} else if (sscanf(s, "M%d", &freq1) == 1) {
/* Mf1 format */
freq2 = -1;
time = 0;
midinote = 1;
} else {
ast_log(LOG_WARNING,"%s: tone component '%s' of '%s' is no good\n",chan->name,s,playlst);
return -1;
}
if (midinote) {
/* midi notes must be between 0 and 127 */
if ((freq1 >= 0) && (freq1 <= 127))
freq1 = midi_tohz[freq1];
else
freq1 = 0;
if ((freq2 >= 0) && (freq2 <= 127))
freq2 = midi_tohz[freq2];
else
freq2 = 0;
}
d.items = realloc(d.items,(d.nitems+1)*sizeof(struct playtones_item));
if (d.items == NULL) {
ast_log(LOG_WARNING, "Realloc failed!\n");
return -1;
}
d.items[d.nitems].fac1 = 2.0 * cos(2.0 * M_PI * (freq1 / 8000.0)) * 32768.0;
d.items[d.nitems].init_v2_1 = sin(-4.0 * M_PI * (freq1 / 8000.0)) * d.vol;
d.items[d.nitems].init_v3_1 = sin(-2.0 * M_PI * (freq1 / 8000.0)) * d.vol;
d.items[d.nitems].fac2 = 2.0 * cos(2.0 * M_PI * (freq2 / 8000.0)) * 32768.0;
d.items[d.nitems].init_v2_2 = sin(-4.0 * M_PI * (freq2 / 8000.0)) * d.vol;
d.items[d.nitems].init_v3_2 = sin(-2.0 * M_PI * (freq2 / 8000.0)) * d.vol;
d.items[d.nitems].duration = time;
d.items[d.nitems].modulate = modulate;
d.nitems++;
s = strsep(&stringp,separator);
}
if (ast_activate_generator(chan, &playtones, &d)) {
free(d.items);
return -1;
}
return 0;
}
void ast_playtones_stop(struct ast_channel *chan)
{
ast_deactivate_generator(chan);
}
/*--------------------------------------------*/
struct tone_zone *tone_zones;
static struct tone_zone *current_tonezone;
/* Protect the tone_zones list (highly unlikely that two things would change
* it at the same time, but still! */
AST_MUTEX_DEFINE_EXPORTED(tzlock);
/* Set global indication country */
int ast_set_indication_country(const char *country)
{
if (country) {
struct tone_zone *z = ast_get_indication_zone(country);
if (z) {
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Setting default indication country to '%s'\n",country);
current_tonezone = z;
return 0;
}
}
return 1; /* not found */
}
/* locate tone_zone, given the country. if country == NULL, use the default country */
struct tone_zone *ast_get_indication_zone(const char *country)
{
struct tone_zone *tz;
int alias_loop = 0;
/* we need some tonezone, pick the first */
if (country == NULL && current_tonezone)
return current_tonezone; /* default country? */
if (country == NULL && tone_zones)
return tone_zones; /* any country? */
if (country == NULL)
return 0; /* not a single country insight */
if (ast_mutex_lock(&tzlock)) {
ast_log(LOG_WARNING, "Unable to lock tone_zones list\n");
return 0;
}
do {
for (tz=tone_zones; tz; tz=tz->next) {
if (strcasecmp(country,tz->country)==0) {
/* tone_zone found */
if (tz->alias && tz->alias[0]) {
country = tz->alias;
break;
}
ast_mutex_unlock(&tzlock);
return tz;
}
}
} while (++alias_loop<20 && tz);
ast_mutex_unlock(&tzlock);
if (alias_loop==20)
ast_log(LOG_NOTICE,"Alias loop for '%s' forcefull broken\n",country);
/* nothing found, sorry */
return 0;
}
/* locate a tone_zone_sound, given the tone_zone. if tone_zone == NULL, use the default tone_zone */
struct tone_zone_sound *ast_get_indication_tone(const struct tone_zone *zone, const char *indication)
{
struct tone_zone_sound *ts;
/* we need some tonezone, pick the first */
if (zone == NULL && current_tonezone)
zone = current_tonezone; /* default country? */
if (zone == NULL && tone_zones)
zone = tone_zones; /* any country? */
if (zone == NULL)
return 0; /* not a single country insight */
if (ast_mutex_lock(&tzlock)) {
ast_log(LOG_WARNING, "Unable to lock tone_zones list\n");
return 0;
}
for (ts=zone->tones; ts; ts=ts->next) {
if (strcasecmp(indication,ts->name)==0) {
/* found indication! */
ast_mutex_unlock(&tzlock);
return ts;
}
}
/* nothing found, sorry */
ast_mutex_unlock(&tzlock);
return 0;
}
/* helper function to delete a tone_zone in its entirety */
static inline void free_zone(struct tone_zone* zone)
{
while (zone->tones) {
struct tone_zone_sound *tmp = zone->tones->next;
free((void*)zone->tones->name);
free((void*)zone->tones->data);
free(zone->tones);
zone->tones = tmp;
}
if (zone->ringcadence)
free((void*)zone->ringcadence);
free(zone);
}
/*--------------------------------------------*/
/* add a new country, if country exists, it will be replaced. */
int ast_register_indication_country(struct tone_zone *zone)
{
struct tone_zone *tz,*pz;
if (ast_mutex_lock(&tzlock)) {
ast_log(LOG_WARNING, "Unable to lock tone_zones list\n");
return -1;
}
for (pz=NULL,tz=tone_zones; tz; pz=tz,tz=tz->next) {
if (strcasecmp(zone->country,tz->country)==0) {
/* tone_zone already there, replace */
zone->next = tz->next;
if (pz)
pz->next = zone;
else
tone_zones = zone;
/* if we are replacing the default zone, re-point it */
if (tz == current_tonezone)
current_tonezone = zone;
/* now free the previous zone */
free_zone(tz);
ast_mutex_unlock(&tzlock);
return 0;
}
}
/* country not there, add */
zone->next = NULL;
if (pz)
pz->next = zone;
else
tone_zones = zone;
ast_mutex_unlock(&tzlock);
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Registered indication country '%s'\n",zone->country);
return 0;
}
/* remove an existing country and all its indications, country must exist.
* Also, all countries which are an alias for the specified country are removed. */
int ast_unregister_indication_country(const char *country)
{
struct tone_zone *tz, *pz = NULL, *tmp;
int res = -1;
if (ast_mutex_lock(&tzlock)) {
ast_log(LOG_WARNING, "Unable to lock tone_zones list\n");
return -1;
}
tz = tone_zones;
while (tz) {
if (country==NULL ||
(strcasecmp(country, tz->country)==0 ||
strcasecmp(country, tz->alias)==0)) {
/* tone_zone found, remove */
tmp = tz->next;
if (pz)
pz->next = tmp;
else
tone_zones = tmp;
/* if we are unregistering the default country, w'll notice */
if (tz == current_tonezone) {
ast_log(LOG_NOTICE,"Removed default indication country '%s'\n",tz->country);
current_tonezone = NULL;
}
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Unregistered indication country '%s'\n",tz->country);
free_zone(tz);
if (tone_zones == tz)
tone_zones = tmp;
tz = tmp;
res = 0;
}
else {
/* next zone please */
pz = tz;
tz = tz->next;
}
}
ast_mutex_unlock(&tzlock);
return res;
}
/* add a new indication to a tone_zone. tone_zone must exist. if the indication already
* exists, it will be replaced. */
int ast_register_indication(struct tone_zone *zone, const char *indication, const char *tonelist)
{
struct tone_zone_sound *ts,*ps;
/* is it an alias? stop */
if (zone->alias[0])
return -1;
if (ast_mutex_lock(&tzlock)) {
ast_log(LOG_WARNING, "Unable to lock tone_zones list\n");
return -2;
}
for (ps=NULL,ts=zone->tones; ts; ps=ts,ts=ts->next) {
if (strcasecmp(indication,ts->name)==0) {
/* indication already there, replace */
free((void*)ts->name);
free((void*)ts->data);
break;
}
}
if (!ts) {
/* not there, we have to add */
ts = malloc(sizeof(struct tone_zone_sound));
if (!ts) {
ast_log(LOG_WARNING, "Out of memory\n");
ast_mutex_unlock(&tzlock);
return -2;
}
ts->next = NULL;
}
ts->name = strdup(indication);
ts->data = strdup(tonelist);
if (ts->name==NULL || ts->data==NULL) {
ast_log(LOG_WARNING, "Out of memory\n");
ast_mutex_unlock(&tzlock);
return -2;
}
if (ps)
ps->next = ts;
else
zone->tones = ts;
ast_mutex_unlock(&tzlock);
return 0;
}
/* remove an existing country's indication. Both country and indication must exist */
int ast_unregister_indication(struct tone_zone *zone, const char *indication)
{
struct tone_zone_sound *ts,*ps = NULL, *tmp;
int res = -1;
/* is it an alias? stop */
if (zone->alias[0])
return -1;
if (ast_mutex_lock(&tzlock)) {
ast_log(LOG_WARNING, "Unable to lock tone_zones list\n");
return -1;
}
ts = zone->tones;
while (ts) {
if (strcasecmp(indication,ts->name)==0) {
/* indication found */
tmp = ts->next;
if (ps)
ps->next = tmp;
else
zone->tones = tmp;
free((void*)ts->name);
free((void*)ts->data);
free(ts);
ts = tmp;
res = 0;
}
else {
/* next zone please */
ps = ts;
ts = ts->next;
}
}
/* indication not found, goodbye */
ast_mutex_unlock(&tzlock);
return res;
}
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