Add a command line option for loading a JACK configuration file

An example configuration could look like the following:
l inprocess1 inprocess
l amp1 jalv http://lv2plug.in/plugins/eg-amp
c amp:out system:playback_1

Signed-off-by: Timo Wischer <twischer@de.adit-jv.com>

common/Jackdmp.cpp

@@ -162,7 +162,7 @@ static void print_server_drivers(jackctl_server_t *server, FILE* file)
     const JSList * node_ptr = jackctl_server_get_drivers_list(server);
 
     fprintf(file, "Available backends:\n");
-    
+
     while (node_ptr) {
         jackctl_driver_t* driver = (jackctl_driver_t *)node_ptr->data;
         fprintf(file, "      %s (%s)\n", jackctl_driver_get_name(driver), (jackctl_driver_get_type(driver) == JackMaster) ? "master" : "slave");
@@ -176,7 +176,7 @@ static void print_server_internals(jackctl_server_t *server, FILE* file)
     const JSList * node_ptr = jackctl_server_get_internals_list(server);
 
     fprintf(file, "Available internals:\n");
-    
+
     while (node_ptr) {
         jackctl_internal_t* internal = (jackctl_internal_t *)node_ptr->data;
         fprintf(file, "      %s\n", jackctl_internal_get_name(internal));
@@ -202,6 +202,7 @@ static void usage(FILE* file, jackctl_server_t *server, bool full = true)
             "               [ --port-max OR -p maximum-number-of-ports]\n"
             "               [ --slave-backend OR -X slave-backend-name ]\n"
             "               [ --internal-client OR -I internal-client-name ]\n"
+            "               [ --audio-path-conf OR -C audio-path-configuration-file ]\n"
             "               [ --verbose OR -v ]\n"
 #ifdef __linux__
             "               [ --clocksource OR -c [ h(pet) | s(ystem) ]\n"
@@ -232,7 +233,7 @@ static void usage(FILE* file, jackctl_server_t *server, bool full = true)
             "         -d master-backend-name [ ... master-backend args ... ]\n"
             "       jackdmp -d master-backend-name --help\n"
             "             to display options for each master backend\n\n");
-    
+
     if (full) {
         print_server_drivers(server, file);
         print_server_internals(server, file);
@@ -265,7 +266,7 @@ int main(int argc, char** argv)
             print_version();
         }
     }
-    const char *options = "-d:X:I:P:uvshrRL:STFl:t:mn:p:"
+    const char *options = "-d:X:I:P:uvshrRL:STFl:t:mn:p:C:"
         "a:"
 #ifdef __linux__
         "c:"
@@ -276,6 +277,7 @@ int main(int argc, char** argv)
 #ifdef __linux__
                                        { "clock-source", 1, 0, 'c' },
 #endif
+                                       { "audio-path-conf", 1, 0, 'C' },
                                        { "loopback-driver", 1, 0, 'L' },
                                        { "audio-driver", 1, 0, 'd' },
                                        { "midi-driver", 1, 0, 'X' },
@@ -301,6 +303,7 @@ int main(int argc, char** argv)
 
     int i,opt = 0;
     int option_index = 0;
+    char* audio_path_conf_file = NULL;
     char* master_driver_name = NULL;
     char** master_driver_args = NULL;
     int master_driver_nargs = 1;
@@ -443,6 +446,10 @@ int main(int argc, char** argv)
                 }
                 break;
 
+            case 'C':
+                audio_path_conf_file = optarg;
+                break;
+
             case 'P':
                 param = jackctl_get_parameter(server_parameters, "realtime-priority");
                 if (param != NULL) {
@@ -606,9 +613,11 @@ int main(int argc, char** argv)
         }
     }
 
-    if (!jackctl_server_load_conf_file(server_ctl, "/etc/jackd.conf")) {
-        fprintf(stderr, "Configuration file %s can not be loaded\n", "TODO");
-        goto stop_server;
+    if (audio_path_conf_file != NULL) {
+        if (!jackctl_server_load_conf_file(server_ctl, audio_path_conf_file)) {
+            fprintf(stderr, "Audio path configuration file %s cannot be loaded!\n", audio_path_conf_file);
+            goto stop_server;
+        }
     }
 
     notify_server_start(server_name);

man/jackd.0

@@ -90,6 +90,33 @@ Prevent JACK from ever kicking out clients because they were too slow.
 This cancels the effect any specified timeout value, but JACK and its clients are
 still subject to the supervision of the watchdog thread or its equivalent.
 .TP
+\fB\-C, \-\-audio-path-conf \fIaudio-path-configuration-file\fR
+.br
+Load internal clients and connections from \fIaudio-path-configuration-file\fR.
+Each line of this configuration file starts with a command.
+The following commands are available:
+.br
+\fBl(oad)\fR \fIclient-name lib-name client-args\fR
+.br
+With this command an internal JACK client will be instantiated.
+\fIclient-name\fR and \fIlib-name\fR have not to contain spaces.
+The rest of the line will be interpreted as \fIclient-args\fR and 
+paste to the client library.
+.br
+\fBc(onnect)\fR \fIsource-port destination-port\fR
+.br
+With this command a source port will be connected with a destination port.
+\fIsource-port\fR and \fIdestination-port\fR have not to contain spaces.
+.br
+Comments are starting with \fB#\fR.
+.br
+An example configuration could look like the following:
+.br
+ l inprocess1 inprocess
+ l amp1 jalv http://lv2plug.in/plugins/eg-amp
+.br
+ c amp:out system:playback_1
+.TP
 \fB\-u, \-\-unlock\fR
 .br
 Unlock libraries GTK+, QT, FLTK, Wine.