sinesliders -> demo-dparams

Original commit message from CVS:
sinesliders -> demo-dparams

diff --git a/gst/sine/Makefile.am b/gst/sine/Makefile.am
index defd049..2f7d73c 100644 (file)
--- a/gst/sine/Makefile.am
+++ b/gst/sine/Makefile.am
@@ -6,3 +6,11 @@ libgstsinesrc_la_SOURCES = gstsinesrc.c
 libgstsinesrc_la_CFLAGS = $(GST_CFLAGS)
 
 noinst_HEADERS = gstsinesrc.h
+
+if HAVE_GTK
+noinst_PROGRAMS = demo-dparams
+endif
+
+demo_dparams_SOURCES = demo-dparams.c
+demo_dparams_CFLAGS  = $(GST_CFLAGS) $(GTK_CFLAGS)
+demo_dparams_LDFLAGS = $(GST_LIBS) $(GTK_LIBS)

diff --git a/gst/sine/demo-dparams.c b/gst/sine/demo-dparams.c
new file mode 100644 (file)
index 0000000..ee966dc
--- /dev/null
+++ b/gst/sine/demo-dparams.c
@@ -0,0 +1,153 @@
+#include <stdio.h>
+#include <math.h>
+#include <gtk/gtk.h>
+#include <gst/gst.h>
+#include <gst/control/control.h>
+
+static gint quit_live(GtkWidget *window, GdkEventAny *e, gpointer data) {
+  gtk_main_quit();
+  return FALSE;
+}
+
+static void dynparm_log_value_changed(GtkAdjustment *adj,GstDParam *dparam) {
+  GValue **point;
+  g_return_if_fail(dparam != NULL);
+  g_return_if_fail(GST_IS_DPARAM (dparam));
+
+  point = GST_DPARAM_GET_POINT(dparam, 0LL);
+  
+  GST_DPARAM_LOCK(dparam);
+  g_print("setting value from %f to %f\n", g_value_get_float(point[0]), (gfloat)exp(adj->value));  
+  g_value_set_float(point[0], (gfloat)exp(adj->value));
+  GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
+  GST_DPARAM_UNLOCK(dparam);
+}
+
+static void dynparm_value_changed(GtkAdjustment *adj,GstDParam *dparam) {
+  GValue **point;
+  g_return_if_fail(dparam != NULL);
+  g_return_if_fail(GST_IS_DPARAM (dparam));
+
+  point = GST_DPARAM_GET_POINT(dparam, 0LL);
+  
+  GST_DPARAM_LOCK(dparam);
+  g_print("setting value from %f to %f\n", g_value_get_float(point[0]), adj->value);  
+  g_value_set_float(point[0], 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;
+  GstDParam *freq;
+  GstDParamSpec *spec;
+  
+  GValue **vals;
+
+  gtk_init(&argc,&argv);
+  gst_init(&argc,&argv);
+  gst_control_init(&argc,&argv);
+
+  /***** 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");
+  g_object_set(G_OBJECT(osssink),"fragment",0x00180008,NULL);
+  g_object_set(G_OBJECT(sinesrc),"buffersize",64,NULL);
+ 
+  dpman = gst_dpman_get_manager (sinesrc);
+
+  freq = gst_dparam_smooth_new(G_TYPE_FLOAT);
+  vals = GST_DPARAM_GET_POINT(freq, 0LL);
+  
+  g_value_set_float(vals[0], 10.0);
+
+  // this defines the maximum slope that this
+  // param can change.  This says that in 50ms
+  // the value can change by a maximum of one semitone
+  // (the log of one semitone is 0.693)
+  g_value_set_float(vals[1], 0.693);
+  g_value_set_float(vals[2], 50000000.0);
+  
+  // set the default update period to 0.5ms, or 2000Hz
+  GST_DPARAM_DEFAULT_UPDATE_PERIOD(freq) = 2000000LL;
+  
+  volume = gst_dparam_smooth_new(G_TYPE_FLOAT);
+  vals = GST_DPARAM_GET_POINT(volume, 0LL);
+  
+  // this defines the maximum slope that this
+  // param can change.  This says that in 10ms
+  // the value can change by a maximum of 0.2
+  g_value_set_float(vals[1], 0.2);
+  g_value_set_float(vals[2], 10000000.0);
+  
+  // set the default update period to 0.5ms, or 2000Hz
+  GST_DPARAM_DEFAULT_UPDATE_PERIOD(volume) = 2000000LL;
+  
+  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 GUI *****/
+  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+  gtk_window_set_default_size(GTK_WINDOW(window), 80, 400);
+  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);
+
+  spec = gst_dpman_get_dparam_spec (dpman, "volume");
+  volume_adj = (GtkAdjustment*)gtk_adjustment_new(g_value_get_float(spec->default_val), 
+                                                  g_value_get_float(spec->min_val),
+                                                  g_value_get_float(spec->max_val), 0.1, 0.01, 0.01);
+  volume_slider = gtk_vscale_new(volume_adj);
+  gtk_scale_set_digits(GTK_SCALE(volume_slider), 2);
+  gtk_box_pack_start(GTK_BOX(hbox),volume_slider,TRUE,TRUE,0);
+
+  spec = gst_dpman_get_dparam_spec (dpman, "freq");
+  freq_adj = (GtkAdjustment*)gtk_adjustment_new((gfloat)log(g_value_get_float(spec->default_val)), 
+                                                (gfloat)log(g_value_get_float(spec->min_val)),
+                                                (gfloat)log(g_value_get_float(spec->max_val)), 0.1, 0.01, 0.01);
+  freq_slider = gtk_vscale_new(freq_adj);
+  gtk_scale_set_digits(GTK_SCALE(freq_slider), 2);
+  gtk_box_pack_start(GTK_BOX(hbox),freq_slider,TRUE,TRUE,0);
+  
+  
+  /***** 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_log_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;
+}