[gst-cvs] gst-plugins-base: seek: add volume label and sync with sink volume

[Stefan Kost]

Module: gst-plugins-base
Branch: master
Commit: 5f69ffea56cb6af9e95af7855a13f2fa06586961
URL:    http://cgit.freedesktop.org/gstreamer/gst-plugins-base/commit/?id=5f69ffea56cb6af9e95af7855a13f2fa06586961

Author: Stefan Kost <ensonic at users.sf.net>
Date:   Wed May 27 17:37:38 2009 +0300

seek: add volume label and sync with sink volume

Look at the volume and have the pulsemixer open at same time. Unfortunately
playbin2 does not emit notify on volume right, so this polls for now.

---

 tests/examples/seek/seek.c |   35 +++++++++++++++++++++++++++++++++--
 1 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/tests/examples/seek/seek.c b/tests/examples/seek/seek.c
index 861236b..9ec4da6 100644
--- a/tests/examples/seek/seek.c
+++ b/tests/examples/seek/seek.c
@@ -26,6 +26,7 @@
 #endif
 
 #include <stdlib.h>
+#include <math.h>
 #include <glib.h>
 #include <gtk/gtk.h>
 #include <gst/gst.h>
@@ -121,6 +122,8 @@ typedef struct
 static GArray *vis_entries;
 
 static void clear_streams (GstElement * pipeline);
+static void volume_notify_cb (GstElement * pipeline, GParamSpec * arg,
+    gpointer user_dat);
 
 /* pipeline construction */
 
@@ -924,7 +927,12 @@ make_playerbin_pipeline (const gchar * location)
 static GstElement *
 make_playerbin2_pipeline (const gchar * location)
 {
-  return construct_playerbin ("playbin2", location);
+  GstElement *pipeline = construct_playerbin ("playbin2", location);
+
+  /* FIXME: this is not triggered, playbin2 is not forwarding it from the sink */
+  g_signal_connect (pipeline, "notify::volume", G_CALLBACK (volume_notify_cb),
+      NULL);
+  return pipeline;
 }
 
 #ifndef GST_DISABLE_PARSE
@@ -1216,6 +1224,11 @@ update_scale (gpointer data)
     set_scale (position * 100.0 / duration);
   }
 
+  /* FIXME: see make_playerbin2_pipeline() and volume_notify_cb() */
+  if (pipeline_type == 16) {
+    g_object_notify (G_OBJECT (pipeline), "volume");
+  }
+
   return TRUE;
 }
 
@@ -1916,6 +1929,22 @@ volume_spinbutton_changed_cb (GtkSpinButton * button, GstPipeline * pipeline)
 }
 
 static void
+volume_notify_cb (GstElement * pipeline, GParamSpec * arg, gpointer user_dat)
+{
+  gdouble cur_volume, new_volume;
+
+  g_object_get (pipeline, "volume", &new_volume, NULL);
+  cur_volume = gtk_spin_button_get_value (GTK_SPIN_BUTTON (volume_spinbutton));
+  if (fabs (cur_volume - new_volume) > 0.001) {
+    g_signal_handlers_block_by_func (volume_spinbutton,
+        volume_spinbutton_changed_cb, pipeline);
+    gtk_spin_button_set_value (GTK_SPIN_BUTTON (volume_spinbutton), new_volume);
+    g_signal_handlers_unblock_by_func (volume_spinbutton,
+        volume_spinbutton_changed_cb, pipeline);
+  }
+}
+
+static void
 shot_cb (GtkButton * button, gpointer data)
 {
   GstBuffer *buffer;
@@ -2314,7 +2343,7 @@ main (int argc, char **argv)
   GtkWidget *play_button, *pause_button, *stop_button, *shot_button;
   GtkWidget *accurate_checkbox, *key_checkbox, *loop_checkbox, *flush_checkbox;
   GtkWidget *scrub_checkbox, *play_scrub_checkbox, *rate_spinbutton;
-  GtkWidget *rate_label;
+  GtkWidget *rate_label, *volume_label;
   GtkTooltips *tips;
   GOptionEntry options[] = {
     {"stats", 's', 0, G_OPTION_ARG_NONE, &stats,
@@ -2473,6 +2502,7 @@ main (int argc, char **argv)
     audio_checkbox = gtk_check_button_new_with_label ("Audio");
     text_checkbox = gtk_check_button_new_with_label ("Text");
     mute_checkbox = gtk_check_button_new_with_label ("Mute");
+    volume_label = gtk_label_new ("Volume");
     volume_spinbutton = gtk_spin_button_new_with_range (0, 10.0, 0.1);
     gtk_spin_button_set_value (GTK_SPIN_BUTTON (volume_spinbutton), 1.0);
     gtk_box_pack_start (GTK_BOX (boxes), video_checkbox, TRUE, TRUE, 2);
@@ -2480,6 +2510,7 @@ main (int argc, char **argv)
     gtk_box_pack_start (GTK_BOX (boxes), text_checkbox, TRUE, TRUE, 2);
     gtk_box_pack_start (GTK_BOX (boxes), vis_checkbox, TRUE, TRUE, 2);
     gtk_box_pack_start (GTK_BOX (boxes), mute_checkbox, TRUE, TRUE, 2);
+    gtk_box_pack_start (GTK_BOX (boxes), volume_label, TRUE, TRUE, 2);
     gtk_box_pack_start (GTK_BOX (boxes), volume_spinbutton, TRUE, TRUE, 2);
     gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (vis_checkbox), FALSE);
     gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (audio_checkbox), TRUE);