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feat: AudioSocket channel, application, and ARI support.

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This commit adds support for
[AudioSocket](
https://wiki.asterisk.org/wiki/display/AST/AudioSocket),
a very simple bidirectional audio streaming protocol. There are both
channel and application interfaces.

A description of the protocol can be found on the above referenced
GitHub page.  A short talk about the reasons and implementation can be
found on [YouTube](https://www.youtube.com/watch?v=tjduXbZZEgI), from
CommCon 2019.

ARI support has also been added via the existing "externalMedia" ARI
functionality. The UUID is specified using the arbitrary "data" field.

ASTERISK-28484 #close

Change-Id: Ie866e6c4fa13178ec76f2a6971ad3590a3a588b5
This commit is contained in:
Seán C McCord
2019-07-17 20:47:50 -04:00
committed by Ben Ford
parent 987e10c75f
commit 163efbd724
10 changed files with 1060 additions and 2 deletions
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47
res/ari/resource_channels.c
View File

@@ -2101,6 +2101,51 @@ static void external_media_rtp_udp(struct ast_ari_channels_external_media_args *
ast_channel_unref(chan);
}
static void external_media_audiosocket_tcp(struct ast_ari_channels_external_media_args *args,
struct ast_variable *variables,
struct ast_ari_response *response)
{
size_t endpoint_len;
char *endpoint;
struct ast_channel *chan;
struct varshead *vars;
endpoint_len = strlen("AudioSocket/") + strlen(args->external_host) + 1 + strlen(args->data) + 1;
endpoint = ast_alloca(endpoint_len);
/* The UUID is stored in the arbitrary data field */
snprintf(endpoint, endpoint_len, "AudioSocket/%s/%s", args->external_host, args->data);
chan = ari_channels_handle_originate_with_id(
endpoint,
NULL,
NULL,
0,
NULL,
args->app,
NULL,
NULL,
0,
variables,
args->channel_id,
NULL,
NULL,
args->format,
response);
ast_variables_destroy(variables);
if (!chan) {
return;
}
ast_channel_lock(chan);
vars = ast_channel_varshead(chan);
if (vars && !AST_LIST_EMPTY(vars)) {
ast_json_object_set(response->message, "channelvars", ast_json_channel_vars(vars));
}
ast_channel_unlock(chan);
ast_channel_unref(chan);
}
#include "asterisk/config.h"
#include "asterisk/netsock2.h"
@@ -2161,6 +2206,8 @@ void ast_ari_channels_external_media(struct ast_variable *headers,
if (strcasecmp(args->encapsulation, "rtp") == 0 && strcasecmp(args->transport, "udp") == 0) {
external_media_rtp_udp(args, variables, response);
} else if (strcasecmp(args->encapsulation, "audiosocket") == 0 && strcasecmp(args->transport, "tcp") == 0) {
external_media_audiosocket_tcp(args, variables, response);
} else {
ast_ari_response_error(
response, 501, "Not Implemented",

2
res/ari/resource_channels.h
View File

@@ -844,6 +844,8 @@ struct ast_ari_channels_external_media_args {
const char *format;
/*! External media direction */
const char *direction;
/*! An arbitrary data field */
const char *data;
};
/*!
* \brief Body parsing function for /channels/externalMedia.