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app_mf: Add full tech-agnostic MF support

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Adds tech-agnostic support for MF signaling by adding
MF sender and receiver applications as well as Dial
integration.

ASTERISK-29496-mf #do-not-close

Change-Id: I61962b359b8ec4cfd05df877ddf9f5b8f71927a4
This commit is contained in:
Naveen Albert
2021-09-22 00:18:08 +00:00
committed by Friendly Automation
parent 67c4661fb0
commit ee9eef492c
7 changed files with 590 additions and 146 deletions
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76
main/channel.c
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@@ -97,10 +97,14 @@ unsigned long global_fin, global_fout;
AST_THREADSTORAGE(state2str_threadbuf);
#define STATE2STR_BUFSIZE 32
/*! Default amount of time to use when emulating a digit as a begin and end
/*! Default amount of time to use when emulating a DTMF digit as a begin and end
* 100ms */
#define AST_DEFAULT_EMULATE_DTMF_DURATION 100
/*! Default amount of time to use when emulating an MF digit as a begin and end
* 55ms */
#define DEFAULT_EMULATE_MF_DURATION 55
#define DEFAULT_AMA_FLAGS AST_AMA_DOCUMENTATION
/*! Minimum amount of time between the end of the last digit and the beginning
@@ -4856,6 +4860,45 @@ int ast_sendtext(struct ast_channel *chan, const char *text)
return rc;
}
int ast_senddigit_mf_begin(struct ast_channel *chan, char digit)
{
static const char * const mf_tones[] = {
"1300+1500", /* 0 */
"700+900", /* 1 */
"700+1100", /* 2 */
"900+1100", /* 3 */
"700+1300", /* 4 */
"900+1300", /* 5 */
"1100+1300", /* 6 */
"700+1500", /* 7 */
"900+1500", /* 8 */
"1100+1500", /* 9 */
"1100+1700", /* * (KP) */
"1500+1700", /* # (ST) */
"900+1700", /* A (STP) */
"1300+1700", /* B (ST2P) */
"700+1700" /* C (ST3P) */
};
if (digit >= '0' && digit <='9') {
ast_playtones_start(chan, 0, mf_tones[digit-'0'], 0);
} else if (digit == '*') {
ast_playtones_start(chan, 0, mf_tones[10], 0);
} else if (digit == '#') {
ast_playtones_start(chan, 0, mf_tones[11], 0);
} else if (digit == 'A') {
ast_playtones_start(chan, 0, mf_tones[12], 0);
} else if (digit == 'B') {
ast_playtones_start(chan, 0, mf_tones[13], 0);
} else if (digit == 'C') {
ast_playtones_start(chan, 0, mf_tones[14], 0);
} else {
/* not handled */
ast_log(LOG_WARNING, "Unable to generate MF tone '%c' for '%s'\n", digit, ast_channel_name(chan));
}
return 0;
}
int ast_senddigit_begin(struct ast_channel *chan, char digit)
{
/* Device does not support DTMF tones, lets fake
@@ -4925,6 +4968,37 @@ int ast_senddigit_end(struct ast_channel *chan, char digit, unsigned int duratio
return 0;
}
int ast_senddigit_mf_end(struct ast_channel *chan)
{
if (ast_channel_generator(chan)) {
ast_playtones_stop(chan);
return 0;
}
return -1;
}
int ast_senddigit_mf(struct ast_channel *chan, char digit, unsigned int duration,
unsigned int durationkp, unsigned int durationst, int is_external)
{
if (duration < DEFAULT_EMULATE_MF_DURATION) {
duration = DEFAULT_EMULATE_MF_DURATION;
}
if (ast_channel_tech(chan)->send_digit_begin) {
if (digit == '*') {
duration = durationkp;
} else if (digit == '#' || digit == 'A' || digit == 'B' || digit == 'C') {
duration = durationst;
}
ast_senddigit_mf_begin(chan, digit);
if (is_external) {
usleep(duration * 1000);
} else {
ast_safe_sleep(chan, duration);
}
}
return ast_senddigit_mf_end(chan);
}
int ast_senddigit(struct ast_channel *chan, char digit, unsigned int duration)
{
if (duration < AST_DEFAULT_EMULATE_DTMF_DURATION) {