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app_sf: Add full tech-agnostic SF support

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

ASTERISK-29802 #close

Change-Id: I7ec50752e9a661af639425e5d1e339f17411bcad
This commit is contained in:
Naveen Albert
2021-12-13 16:59:02 +00:00
committed by George Joseph
parent 16a63027c0
commit dd6df42534
5 changed files with 675 additions and 6 deletions
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25
include/asterisk/app.h
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@@ -941,6 +941,31 @@ void ast_replace_sigchld(void);
*/
void ast_unreplace_sigchld(void);
/*!
* \brief Send a string of SF digits to a channel
*
* \param chan The channel that will receive the SF digits
* \param peer (optional) Peer channel that will be autoserviced while the
* primary channel is receiving SF
* \param chan2 A second channel that will simultaneously receive SF digits.
* This option may only be used if is_external is 0.
* \param digits This is a string of characters representing the SF digits
* to be sent to the channel. Valid characters are
* "0123456789". Note: You can pass arguments 'f' or
* 'F', if you want to Flash the channel (if supported by the
* channel), or 'w' or 'W' to add a wink (if supported by the
* channel).
* \param frequency The frequency to use for signaling. 0 can be specified for
* the default, which is 2600 Hz.
* \param is_external 1 if called by a thread that is not the channel's media
* handler thread, 0 if called by the channel's media handler
* thread.
*
* \retval 0 on success.
* \retval -1 on failure or a channel hung up.
*/
int ast_sf_stream(struct ast_channel *chan, struct ast_channel *peer, struct ast_channel *chan2, const char *digits, int frequency, int is_external);
/*!
* \brief Send a string of MF digits to a channel
*