Add audio/video sink and source abstractions

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>

svn path=/trunk/; revision=2384

1 files changed, 298 insertions, 0 deletions

diff --git a/libempathy-gtk/empathy-video-widget.c b/libempathy-gtk/empathy-video-widget.c
new file mode 100644
index 000000000..7941b3198
--- /dev/null
+++ b/libempathy-gtk/empathy-video-widget.c
@@ -0,0 +1,298 @@
+/*
+ * empathy-gst-gtk-widget.c - Source for EmpathyVideoWidget
+ * Copyright (C) 2008 Collabora Ltd.
+ * @author Sjoerd Simons <sjoerd.simons@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <gdk/gdkx.h>
+#include <gst/interfaces/xoverlay.h>
+#include <gst/farsight/fs-element-added-notifier.h>
+
+#include "empathy-video-widget.h"
+
+G_DEFINE_TYPE(EmpathyVideoWidget, empathy_video_widget,
+  GTK_TYPE_DRAWING_AREA)
+
+static void empathy_video_widget_element_added_cb (
+  FsElementAddedNotifier *notifier, GstBin *bin, GstElement *element,
+  EmpathyVideoWidget *self);
+
+static void empathy_video_widget_sync_message_cb (
+  GstBus *bus, GstMessage *message, EmpathyVideoWidget *self);
+
+/* signal enum */
+#if 0
+enum
+{
+    LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = {0};
+#endif
+
+enum {
+  PROP_GST_ELEMENT = 1,
+  PROP_GST_BUS,
+};
+
+/* private structure */
+typedef struct _EmpathyVideoWidgetPriv EmpathyVideoWidgetPriv;
+
+struct _EmpathyVideoWidgetPriv
+{
+  gboolean dispose_has_run;
+  GstBus *bus;
+  GstElement *videosink;
+  GstPad *sink_pad;
+  GstElement *overlay;
+  FsElementAddedNotifier *notifier;
+};
+
+#define GET_PRIV(o)     (G_TYPE_INSTANCE_GET_PRIVATE ((o), \
+  EMPATHY_TYPE_GST_GTK_WIDGET, EmpathyVideoWidgetPriv))
+
+static void
+empathy_video_widget_init (EmpathyVideoWidget *obj)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (obj);
+
+  priv->notifier = fs_element_added_notifier_new ();
+  g_signal_connect (priv->notifier, "element-added",
+    G_CALLBACK (empathy_video_widget_element_added_cb),
+    obj);
+
+  gtk_widget_set_size_request (GTK_WIDGET (obj), 320, 240);
+
+  GTK_WIDGET_UNSET_FLAGS (GTK_WIDGET (obj), GTK_DOUBLE_BUFFERED);
+}
+
+static void
+empathy_video_widget_constructed (GObject *object)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (object);
+
+  priv->videosink = gst_element_factory_make ("gconfvideosink", NULL);
+  priv->sink_pad = gst_element_get_static_pad (priv->videosink, "sink");
+
+  fs_element_added_notifier_add (priv->notifier, GST_BIN (priv->videosink));
+  gst_bus_enable_sync_message_emission (priv->bus);
+
+  g_signal_connect (priv->bus, "sync-message",
+    G_CALLBACK (empathy_video_widget_sync_message_cb), object);
+
+}
+
+static void empathy_video_widget_dispose (GObject *object);
+static void empathy_video_widget_finalize (GObject *object);
+static gboolean empathy_video_widget_expose_event (GtkWidget *widget,
+  GdkEventExpose *event);
+
+static void
+empathy_video_widget_set_property (GObject *object,
+  guint property_id, const GValue *value, GParamSpec *pspec)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (object);
+
+  switch (property_id)
+    {
+      case PROP_GST_BUS:
+        priv->bus = g_value_dup_object (value);
+        break;
+      default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+    }
+}
+
+static void
+empathy_video_widget_get_property (GObject *object,
+  guint property_id, GValue *value, GParamSpec *pspec)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (object);
+
+  switch (property_id)
+    {
+      case PROP_GST_ELEMENT:
+        g_value_set_object (value, priv->videosink);
+        break;
+      case PROP_GST_BUS:
+        g_value_set_object (value, priv->bus);
+        break;
+      default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+    }
+}
+
+
+static void
+empathy_video_widget_class_init (
+  EmpathyVideoWidgetClass *empathy_video_widget_class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (empathy_video_widget_class);
+  GtkWidgetClass *widget_class =
+    GTK_WIDGET_CLASS (empathy_video_widget_class);
+  GParamSpec *param_spec;
+
+  g_type_class_add_private (empathy_video_widget_class,
+    sizeof (EmpathyVideoWidgetPriv));
+
+  object_class->dispose = empathy_video_widget_dispose;
+  object_class->finalize = empathy_video_widget_finalize;
+  object_class->constructed = empathy_video_widget_constructed;
+
+  object_class->set_property = empathy_video_widget_set_property;
+  object_class->get_property = empathy_video_widget_get_property;
+
+  widget_class->expose_event = empathy_video_widget_expose_event;
+
+  param_spec = g_param_spec_object ("gst-element",
+    "gst-element", "The underlaying gstreamer element",
+    GST_TYPE_ELEMENT,
+    G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+  g_object_class_install_property (object_class, PROP_GST_ELEMENT, param_spec);
+
+  param_spec = g_param_spec_object ("gst-bus",
+    "gst-bus",
+    "The toplevel bus from the pipeline in which this bin will be added",
+    GST_TYPE_BUS,
+    G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+  g_object_class_install_property (object_class, PROP_GST_BUS, param_spec);
+}
+
+void
+empathy_video_widget_dispose (GObject *object)
+{
+  EmpathyVideoWidget *self = EMPATHY_VIDEO_WIDGET (object);
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+
+  if (priv->dispose_has_run)
+    return;
+
+  priv->dispose_has_run = TRUE;
+
+  if (priv->bus != NULL)
+    g_object_unref (priv->bus);
+
+  priv->bus = NULL;
+
+  /* release any references held by the object here */
+
+  if (G_OBJECT_CLASS (empathy_video_widget_parent_class)->dispose)
+    G_OBJECT_CLASS (empathy_video_widget_parent_class)->dispose (object);
+}
+
+void
+empathy_video_widget_finalize (GObject *object)
+{
+  //EmpathyVideoWidget *self = EMPATHY_VIDEO_WIDGET (object);
+  //EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+
+  /* free any data held directly by the object here */
+
+  G_OBJECT_CLASS (empathy_video_widget_parent_class)->finalize (object);
+}
+
+static void
+empathy_video_widget_element_added_cb (FsElementAddedNotifier *notifier,
+  GstBin *bin, GstElement *element, EmpathyVideoWidget *self)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+
+  if (priv->overlay == NULL && GST_IS_X_OVERLAY (element))
+    {
+      priv->overlay = element;
+      gst_x_overlay_expose (GST_X_OVERLAY (priv->overlay));
+    }
+
+  if (g_object_class_find_property (
+      G_OBJECT_GET_CLASS (element), "force-aspect-ratio"))
+    {
+      g_object_set (G_OBJECT (element), "force-aspect-ratio", TRUE, NULL);
+    }
+}
+
+static void
+empathy_video_widget_sync_message_cb (GstBus *bus, GstMessage *message,
+  EmpathyVideoWidget *self)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+  const GstStructure *s;
+
+  if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
+    return;
+
+  if (GST_MESSAGE_SRC (message) != (GstObject *) priv->overlay)
+    return;
+
+  s = gst_message_get_structure (message);
+
+  if (gst_structure_has_name (s, "prepare-xwindow-id"))
+    {
+      gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (priv->overlay),
+        GDK_WINDOW_XID (GTK_WIDGET (self)->window));
+    }
+}
+
+static gboolean
+empathy_video_widget_expose_event (GtkWidget *widget, GdkEventExpose *event)
+{
+  EmpathyVideoWidget *self = EMPATHY_VIDEO_WIDGET (widget);
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+
+  if (event != NULL && event->count > 0)
+    return TRUE;
+
+  if (priv->overlay == NULL)
+    return TRUE;
+
+  gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (priv->overlay),
+    GDK_WINDOW_XID (widget->window));
+
+  gst_x_overlay_expose (GST_X_OVERLAY (priv->overlay));
+
+  return TRUE;
+}
+
+
+GtkWidget *
+empathy_video_widget_new (GstBus *bus)
+{
+  g_return_val_if_fail (bus != NULL, NULL);
+
+  return GTK_WIDGET (g_object_new (EMPATHY_TYPE_GST_GTK_WIDGET,
+    "gst-bus", bus,
+    NULL));
+}
+
+GstPad *
+empathy_video_widget_get_sink (EmpathyVideoWidget *widget)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (widget);
+
+  return priv->sink_pad;
+}
+
+GstElement *
+empathy_video_widget_get_element (EmpathyVideoWidget *widget)
+{
+  EmpathyVideoWidgetPriv *priv = GET_PRIV (widget);
+
+  return priv->videosink;
+}