examples: add test to demonstrate jack_client_t usage

tests/examples/jack/Makefile.am

@@ -0,0 +1,6 @@
+noinst_PROGRAMS = jack_client
+
+jack_client_SOURCES = jack_client.c
+jack_client_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS) $(JACK_CFLAGS)
+jack_client_LDFLAGS = $(GST_LIBS) $(GTK_LIBS) $(JACK_LIBS)
+

tests/examples/jack/jack_client.c

@@ -0,0 +1,79 @@
+/* This app demonstrates the creation and use of a jack client in conjunction
+ * with the jack plugins. This way, an application can control the jack client
+ * directly.
+ */
+
+#include <gst/gst.h>
+#include <gtk/gtk.h>
+#include <jack/jack.h>
+
+static gboolean
+quit_cb (gpointer data)
+{
+  gtk_main_quit ();
+  return FALSE;
+}
+
+int
+main (int argc, char **argv)
+{
+  jack_client_t *src_client, *sink_client;
+  jack_status_t status;
+  GstElement *pipeline, *src, *sink;
+  GstStateChangeReturn ret;
+
+  gst_init (&argc, &argv);
+
+  /* create jack clients */
+  src_client = jack_client_open ("src_client", JackNoStartServer, &status);
+  if (src_client == NULL) {
+    if (status & JackServerFailed)
+      g_print ("JACK server not running\n");
+    else
+      g_print ("jack_client_open() failed, status = 0x%2.0x\n", status);
+    return 1;
+  }
+
+  sink_client = jack_client_open ("sink_client", JackNoStartServer, &status);
+  if (sink_client == NULL) {
+    if (status & JackServerFailed)
+      g_print ("JACK server not running\n");
+    else
+      g_print ("jack_client_open() failed, status = 0x%2.0x\n", status);
+    return 1;
+  }
+
+  /* create gst elements */
+  pipeline = gst_pipeline_new ("my_pipeline");
+
+  src = gst_element_factory_make ("jackaudiosrc", NULL);
+  sink = gst_element_factory_make ("jackaudiosink", NULL);
+
+  g_object_set (src, "client", src_client, NULL);
+  g_object_set (sink, "client", sink_client, NULL);
+
+  gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
+
+  /* link everything together */
+  if (!gst_element_link (src, sink)) {
+    g_print ("Failed to link elements!\n");
+    return 1;
+  }
+
+  /* run */
+  ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
+  if (ret == GST_STATE_CHANGE_FAILURE) {
+    g_print ("Failed to start up pipeline!\n");
+    return 1;
+  }
+
+  /* quit after 5 seconds */
+  g_timeout_add (5000, (GSourceFunc) quit_cb, NULL);
+  gtk_main ();
+
+  /* clean up */
+  gst_element_set_state (pipeline, GST_STATE_NULL);
+  gst_object_unref (pipeline);
+
+  return 0;
+}