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audiosocket: added support for DTMF frames

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Updated the AudioSocket protocol to allow sending DTMF frames.
AST_FRAME_DTMF frames are now forwarded to the server, in addition to
AST_FRAME_AUDIO frames. A new payload type AST_AUDIOSOCKET_KIND_DTMF
with value 0x03 was added to the protocol. The payload is a 1-byte
ascii representing the DTMF digit (0-9,*,#...).

UserNote: The AudioSocket protocol now forwards DTMF frames with
payload type 0x03. The payload is a 1-byte ascii representing the DTMF
digit (0-9,*,#...).

(cherry picked from commit ea657ec7c7)
This commit is contained in:
Florent CHAUVEAU
2025-02-28 08:47:18 +01:00
committed by Asterisk Development Team
parent b2b1977ad1
commit 870f59e28d
4 changed files with 61 additions and 13 deletions
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6
apps/app_audiosocket.c
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@@ -64,7 +64,7 @@
</parameter>
</syntax>
<description>
<para>Connects to the given TCP server, then transmits channel audio as 16-bit, 8KHz mono PCM over that socket (other codecs available via the channel driver interface). In turn, PCM audio is received from the socket and sent to the channel. Only audio frames will be transmitted.</para>
<para>Connects to the given TCP server, then transmits channel audio as 16-bit, 8KHz mono PCM over that socket (other codecs available via the channel driver interface). In turn, PCM audio is received from the socket and sent to the channel. Only audio frames and DTMF frames will be transmitted.</para>
<para>Protocol is specified at https://docs.asterisk.org/Configuration/Channel-Drivers/AudioSocket/</para>
<para>This application does not automatically answer and should generally be preceeded by an application such as Answer() or Progress().</para>
</description>
@@ -184,8 +184,8 @@ static int audiosocket_run(struct ast_channel *chan, const char *id, int svc, co
return -1;
}
if (f->frametype == AST_FRAME_VOICE) {
/* Send audio frame to audiosocket */
if (f->frametype == AST_FRAME_VOICE || f->frametype == AST_FRAME_DTMF) {
/* Send audio frame or DTMF frame to audiosocket */
if (ast_audiosocket_send_frame(svc, f)) {
ast_log(LOG_WARNING, "Failed to forward frame from channel '%s' to AudioSocket server '%s'\n",
chanName, server);