added sinesliders - a test app for dparams

Original commit message from CVS:
added sinesliders - a test app for dparams

test/.gitignore

@@ -54,3 +54,7 @@ video2mp1
 mp3mad
 videotest2
 lat
+sinesliders
+mp2tomp1v2
+main
+testspeed

test/Makefile.am

@@ -4,7 +4,7 @@ if HAVE_GNOME
 GNOME_PROGS = spectrum wave mp1parse videotest aviparse \
 		videotest2 video2mp1 dvshow dv2mp1 \
 		mpeg2parse mpeg2parse2 mpeg2parse3 \
-		mp2tomp1v2 main testspeed
+		mp2tomp1v2 main sinesliders testspeed
 else
 GNOME_PROGS =
 endif

test/sinesliders.c

@@ -0,0 +1,104 @@
+#include <stdio.h>
+#include <gtk/gtk.h>
+#include <gst/gst.h>
+#include <sys/soundcard.h>
+
+static gint quit_live(GtkWidget *window, GdkEventAny *e, gpointer data) {
+  gtk_main_quit();
+  return FALSE;
+}
+
+//static void volume_changed(GtkAdjustment *adj,GstElement *element) {
+  //fprintf(stderr,"setting volume to %f\n",adj->value);
+//  gtk_object_set(GTK_OBJECT(element),"volume",adj->value,NULL);
+//}
+
+static void dynparm_value_changed(GtkAdjustment *adj,GstDparam *dparam) {
+  GstDparamPoint *point;
+  GValue *value;
+  g_assert(dparam != NULL);
+  g_assert(GST_IS_DPARAM (dparam));
+
+  point = GST_DPARAM_GET_POINT(dparam, 0LL);
+  
+  GST_DPARAM_LOCK(dparam);
+  value = point->values[0];
+  g_print("setting value from %f to %f\n", g_value_get_float(value), adj->value);  
+  g_value_set_float(value, adj->value);
+  GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
+  GST_DPARAM_UNLOCK(dparam);
+}
+
+
+int main(int argc,char *argv[]) {
+  GtkWidget *window;
+  GtkWidget *hbox;
+  GtkAdjustment *volume_adj;
+  GtkAdjustment *freq_adj;
+  GtkWidget *volume_slider;
+  GtkWidget *freq_slider;
+
+  GstElement *thread, *sinesrc, *osssink;
+  GstDparamManager *dpman;
+  GstDparam *volume, *freq;
+
+  gtk_init(&argc,&argv);
+  gst_init(&argc,&argv);
+
+  /***** set up the GUI *****/
+  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+  g_signal_connect(window,"delete_event",GTK_SIGNAL_FUNC(quit_live),NULL);
+  hbox = gtk_hbox_new(TRUE,0);
+  gtk_container_add(GTK_CONTAINER(window),hbox);
+
+  volume_adj = (GtkAdjustment*)gtk_adjustment_new(1.0, 0.0, 1.0, 0.01, 0.01, 0.01);
+  volume_slider = gtk_vscale_new(volume_adj);
+  gtk_box_pack_start(GTK_BOX(hbox),volume_slider,TRUE,TRUE,0);
+
+  freq_adj = (GtkAdjustment*)gtk_adjustment_new(440.0, 0.0, 2000.0, 1.0, 5.0, 5.0);
+  freq_slider = gtk_vscale_new(freq_adj);
+  gtk_box_pack_start(GTK_BOX(hbox),freq_slider,TRUE,TRUE,0);
+
+  /***** construct the pipeline *****/
+  
+  g_print("creating elements\n");
+  thread = gst_thread_new("live-example");
+  sinesrc = gst_elementfactory_make("sinesrc","sine-source");
+  osssink = gst_elementfactory_make("osssink","sound-sink");
+  gst_bin_add(GST_BIN(thread),sinesrc);
+  gst_bin_add(GST_BIN(thread),osssink);
+  gst_element_connect(sinesrc,"src",osssink,"sink");
+  gtk_object_set(GTK_OBJECT(sinesrc),"GstSineSrc::buffersize",64,NULL);
+ 
+  dpman = GST_ELEMENT_DPARAM_MANAGER(sinesrc);
+  volume = gst_dparam_new();
+  freq = gst_dparam_new();
+
+  g_assert(gst_dpman_attach_dparam (dpman, "volume", volume));
+  g_assert(gst_dpman_attach_dparam (dpman, "freq", freq));
+  
+  gst_dpman_set_mode(dpman, "synchronous");
+
+  /***** set up the handlers and such *****/
+  //gtk_signal_connect(volume_adj,"value-changed",GTK_SIGNAL_FUNC(volume_changed),sinesrc);
+  g_signal_connect(volume_adj,"value-changed",
+					 GTK_SIGNAL_FUNC(dynparm_value_changed),
+					 volume);
+
+  g_signal_connect(freq_adj,"value-changed",
+					 GTK_SIGNAL_FUNC(dynparm_value_changed),
+					 freq);
+  gtk_adjustment_value_changed(volume_adj);
+  gtk_adjustment_value_changed(freq_adj);
+  
+  g_print("starting pipeline\n");
+ 
+  /***** start everything up *****/
+  gst_element_set_state(thread,GST_STATE_PLAYING);
+
+
+  gtk_widget_show_all(window);
+  gtk_main();
+  
+  return 0;
+}