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channel: Add ability to request an outgoing channel with stream topology.

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This change extends the ast_request functionality by adding another
function and callback to create an outgoing channel with a requested
stream topology. Fallback is provided by either converting the
requested stream topology into a format capabilities structure if
the channel driver does not support streams or by converting the
requested format capabilities into a stream topology if the channel
driver does support streams.

The Dial application has also been updated to request an outgoing
channel with the stream topology of the calling channel.

ASTERISK-26959

Change-Id: Ifa9037a672ac21d42dd7125aa09816dc879a70e6
This commit is contained in:
Joshua Colp
2017-04-24 15:59:44 +00:00
parent dc6654d969
commit 2b22c3c84b
6 changed files with 230 additions and 47 deletions
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17
apps/app_dial.c
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@@ -66,6 +66,7 @@
#include "asterisk/bridge_after.h"
#include "asterisk/features_config.h"
#include "asterisk/max_forwards.h"
#include "asterisk/stream.h"
/*** DOCUMENTATION
<application name="Dial" language="en_US">
@@ -970,16 +971,16 @@ static void do_forward(struct chanlist *o, struct cause_args *num,
c = o->chan = NULL;
cause = AST_CAUSE_BUSY;
} else {
struct ast_format_cap *nativeformats;
struct ast_stream_topology *topology;
ast_channel_lock(in);
nativeformats = ao2_bump(ast_channel_nativeformats(in));
topology = ast_stream_topology_clone(ast_channel_get_stream_topology(in));
ast_channel_unlock(in);
/* Setup parameters */
c = o->chan = ast_request(tech, nativeformats, NULL, in, stuff, &cause);
c = o->chan = ast_request_with_stream_topology(tech, topology, NULL, in, stuff, &cause);
ao2_cleanup(nativeformats);
ast_stream_topology_free(topology);
if (c) {
if (single && !caller_entertained) {
@@ -2444,7 +2445,7 @@ static int dial_exec_full(struct ast_channel *chan, const char *data, struct ast
char *tech = strsep(&number, "/");
size_t tech_len;
size_t number_len;
struct ast_format_cap *nativeformats;
struct ast_stream_topology *topology;
num_dialed++;
if (ast_strlen_zero(number)) {
@@ -2496,13 +2497,13 @@ static int dial_exec_full(struct ast_channel *chan, const char *data, struct ast
*/
ast_party_connected_line_copy(&tmp->connected, ast_channel_connected(chan));
nativeformats = ao2_bump(ast_channel_nativeformats(chan));
topology = ast_stream_topology_clone(ast_channel_get_stream_topology(chan));
ast_channel_unlock(chan);
tc = ast_request(tmp->tech, nativeformats, NULL, chan, tmp->number, &cause);
tc = ast_request_with_stream_topology(tmp->tech, topology, NULL, chan, tmp->number, &cause);
ao2_cleanup(nativeformats);
ast_stream_topology_free(topology);
if (!tc) {
/* If we can't, just go on to the next call */