Add another small option for the JACK app and JACK_HOOK function. The 'n'

option tells JACK not to start jackd automatically if it is not already
running.  Otherwise, the default is that jackd will get started for you if
it isn't running already.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@98676 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_jack.c

@@ -63,7 +63,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 "    i(<name>) - Connect the output port that gets created to the specified\n" \
 "                jack input port.\n" \
 "    o(<name>) - Connect the input port that gets created to the specified\n" \
-"                jack output port.\n"
+"                jack output port.\n" \
+"    n         - Do not automatically start the JACK server if it is not already\n" \
+"                running.\n"
 
 static char *jack_app = "JACK";
 static char *jack_synopsis = 
@@ -94,6 +96,7 @@ struct jack_data {
 	double input_resample_factor;
 	unsigned int stop:1;
 	unsigned int has_audiohook:1;
+	unsigned int no_start_server:1;
 	/*! Only used with JACK_HOOK */
 	struct ast_audiohook audiohook;
 };
@@ -349,6 +352,7 @@ static int init_jack_data(struct ast_channel *chan, struct jack_data *jack_data)
 {
 	const char *chan_name;
 	jack_status_t status = 0;
+	jack_options_t jack_options = JackNullOption;
 
 	ast_channel_lock(chan);
 	chan_name = ast_strdupa(chan->name);
@@ -360,11 +364,15 @@ static int init_jack_data(struct ast_channel *chan, struct jack_data *jack_data)
 	if (!(jack_data->input_rb = jack_ringbuffer_create(RINGBUFFER_SIZE)))
 		return -1;
 
+	if (jack_data->no_start_server)
+		jack_options |= JackNoStartServer;
+
 	if (!ast_strlen_zero(jack_data->server_name)) {
-		jack_data->client = jack_client_open(chan_name, JackServerName, &status,
+		jack_options |= JackServerName;
+		jack_data->client = jack_client_open(chan_name, jack_options, &status,
 			jack_data->server_name);
 	} else {
-		jack_data->client = jack_client_open(chan_name, JackNullOption, &status);
+		jack_data->client = jack_client_open(chan_name, jack_options, &status);
 	}
 
 	if (status)
@@ -598,9 +606,10 @@ static void handle_jack_audio(struct ast_channel *chan, struct jack_data *jack_d
 }
 
 enum {
-	OPT_SERVER_NAME = (1 << 0),
-	OPT_INPUT_PORT =  (1 << 1),
-	OPT_OUTPUT_PORT = (1 << 2),
+	OPT_SERVER_NAME =    (1 << 0),
+	OPT_INPUT_PORT =     (1 << 1),
+	OPT_OUTPUT_PORT =    (1 << 2),
+	OPT_NOSTART_SERVER = (1 << 3),
 };
 
 enum {
@@ -615,6 +624,7 @@ AST_APP_OPTIONS(jack_exec_options, BEGIN_OPTIONS
 	AST_APP_OPTION_ARG('s', OPT_SERVER_NAME, OPT_ARG_SERVER_NAME),
 	AST_APP_OPTION_ARG('i', OPT_INPUT_PORT, OPT_ARG_INPUT_PORT),
 	AST_APP_OPTION_ARG('o', OPT_OUTPUT_PORT, OPT_ARG_OUTPUT_PORT),
+	AST_APP_OPTION('n', OPT_NOSTART_SERVER),
 END_OPTIONS );
 
 static struct jack_data *jack_data_alloc(void)
@@ -672,6 +682,8 @@ static int handle_options(struct jack_data *jack_data, const char *__options_str
 		}
 	}
 
+	jack_data->no_start_server = ast_test_flag(&options, OPT_NOSTART_SERVER) ? 1 : 0;
+
 	return 0;
 }