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-rw-r--r--src/empathy-video-widget.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/src/empathy-video-widget.c b/src/empathy-video-widget.c
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+/*
+ * 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,
+ PROP_MIN_WIDTH,
+ PROP_MIN_HEIGHT,
+ PROP_SYNC,
+ PROP_ASYNC,
+};
+
+/* private structure */
+typedef struct _EmpathyVideoWidgetPriv EmpathyVideoWidgetPriv;
+
+struct _EmpathyVideoWidgetPriv
+{
+ gboolean dispose_has_run;
+ GstBus *bus;
+ GstElement *videosink;
+ GstPad *sink_pad;
+ GstElement *overlay;
+ FsElementAddedNotifier *notifier;
+ gint min_width;
+ gint min_height;
+ gboolean sync;
+ gboolean async;
+
+ GMutex *lock;
+};
+
+#define GET_PRIV(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), \
+ EMPATHY_TYPE_VIDEO_WIDGET, EmpathyVideoWidgetPriv))
+
+static void
+empathy_video_widget_init (EmpathyVideoWidget *obj)
+{
+ EmpathyVideoWidgetPriv *priv = GET_PRIV (obj);
+ GdkRGBA black;
+
+ priv->lock = g_mutex_new ();
+
+ priv->notifier = fs_element_added_notifier_new ();
+ g_signal_connect (priv->notifier, "element-added",
+ G_CALLBACK (empathy_video_widget_element_added_cb),
+ obj);
+
+ if (gdk_rgba_parse (&black, "Black"))
+ gtk_widget_override_background_color (GTK_WIDGET (obj), 0, &black);
+
+ gtk_widget_set_double_buffered (GTK_WIDGET (obj), FALSE);
+}
+
+static void
+empathy_video_widget_realized (GtkWidget *widget, gpointer user_data)
+{
+ /* requesting the XID forces the GdkWindow to be native in GTK+ 2.18
+ * onwards, requesting the native window in a thread causes a BadWindowID,
+ * so we need to request it now. We could call gdk_window_ensure_native(),
+ * but that would mean we require GTK+ 2.18, so instead we call this */
+ GDK_WINDOW_XID (gtk_widget_get_window (GTK_WIDGET (widget)));
+}
+
+static void
+empathy_video_widget_constructed (GObject *object)
+{
+ EmpathyVideoWidgetPriv *priv = GET_PRIV (object);
+ GstElement *colorspace, *videoscale, *sink;
+ GstPad *pad;
+
+ g_signal_connect (object, "realize",
+ G_CALLBACK (empathy_video_widget_realized), NULL);
+
+ priv->videosink = gst_bin_new (NULL);
+
+ gst_object_ref (priv->videosink);
+ gst_object_sink (priv->videosink);
+
+ priv->sink_pad = gst_element_get_static_pad (priv->videosink, "sink");
+
+ sink = gst_element_factory_make ("gconfvideosink", NULL);
+ g_assert (sink != NULL);
+
+ videoscale = gst_element_factory_make ("videoscale", NULL);
+ g_assert (videoscale != NULL);
+
+ g_object_set (videoscale, "qos", FALSE, NULL);
+
+ colorspace = gst_element_factory_make ("ffmpegcolorspace", NULL);
+ g_assert (colorspace != NULL);
+
+ g_object_set (colorspace, "qos", FALSE, NULL);
+
+ gst_bin_add_many (GST_BIN (priv->videosink), colorspace, videoscale,
+ sink, NULL);
+
+ if (!gst_element_link (colorspace, videoscale))
+ g_error ("Failed to link ffmpegcolorspace and videoscale");
+
+ if (!gst_element_link (videoscale, sink))
+ g_error ("Failed to link videoscale and gconfvideosink");
+
+ pad = gst_element_get_static_pad (colorspace, "sink");
+ g_assert (pad != NULL);
+
+ priv->sink_pad = gst_ghost_pad_new ("sink", pad);
+ if (!gst_element_add_pad (priv->videosink, priv->sink_pad))
+ g_error ("Couldn't add sink ghostpad to the bin");
+
+ gst_object_unref (pad);
+
+ 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);
+
+ gtk_widget_set_size_request (GTK_WIDGET (object), priv->min_width,
+ priv->min_height);
+}
+
+static void empathy_video_widget_dispose (GObject *object);
+static void empathy_video_widget_finalize (GObject *object);
+
+
+static gboolean empathy_video_widget_draw (GtkWidget *widget,
+ cairo_t *cr);
+
+static void
+empathy_video_widget_element_set_sink_properties (EmpathyVideoWidget *self);
+
+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;
+ case PROP_MIN_WIDTH:
+ priv->min_width = g_value_get_int (value);
+ break;
+ case PROP_MIN_HEIGHT:
+ priv->min_height = g_value_get_int (value);
+ break;
+ case PROP_SYNC:
+ priv->sync = g_value_get_boolean (value);
+ empathy_video_widget_element_set_sink_properties (
+ EMPATHY_VIDEO_WIDGET (object));
+ break;
+ case PROP_ASYNC:
+ priv->async = g_value_get_boolean (value);
+ empathy_video_widget_element_set_sink_properties (
+ EMPATHY_VIDEO_WIDGET (object));
+ 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;
+ case PROP_MIN_WIDTH:
+ g_value_set_int (value, priv->min_width);
+ break;
+ case PROP_MIN_HEIGHT:
+ g_value_set_int (value, priv->min_height);
+ break;
+ case PROP_SYNC:
+ g_value_set_boolean (value, priv->sync);
+ break;
+ case PROP_ASYNC:
+ g_value_set_boolean (value, priv->async);
+ 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->draw = empathy_video_widget_draw;
+
+ 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);
+
+ param_spec = g_param_spec_int ("min-width",
+ "min-width",
+ "Minimal width of the widget",
+ 0, G_MAXINT, EMPATHY_VIDEO_WIDGET_DEFAULT_WIDTH,
+ G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+ g_object_class_install_property (object_class, PROP_MIN_WIDTH, param_spec);
+
+ param_spec = g_param_spec_int ("min-height",
+ "min-height",
+ "Minimal height of the widget",
+ 0, G_MAXINT, EMPATHY_VIDEO_WIDGET_DEFAULT_HEIGHT,
+ G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+ g_object_class_install_property (object_class, PROP_MIN_HEIGHT, param_spec);
+
+ param_spec = g_param_spec_boolean ("sync",
+ "sync",
+ "Whether the underlying sink should be sync or not",
+ TRUE,
+ G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+ g_object_class_install_property (object_class, PROP_SYNC, param_spec);
+
+ param_spec = g_param_spec_boolean ("async",
+ "async",
+ "Whether the underlying sink should be async or not",
+ TRUE,
+ G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+ g_object_class_install_property (object_class, PROP_ASYNC, 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;
+
+ g_signal_handlers_disconnect_by_func (priv->bus,
+ empathy_video_widget_sync_message_cb, object);
+
+ if (priv->bus != NULL)
+ g_object_unref (priv->bus);
+
+ priv->bus = NULL;
+
+ if (priv->videosink != NULL)
+ g_object_unref (priv->videosink);
+
+ priv->videosink = 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_mutex_free (priv->lock);
+
+ G_OBJECT_CLASS (empathy_video_widget_parent_class)->finalize (object);
+}
+
+
+static void
+empathy_video_widget_element_set_sink_properties_unlocked (
+ EmpathyVideoWidget *self)
+{
+ EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+
+ if (priv->overlay == NULL)
+ return;
+
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS (priv->overlay),
+ "force-aspect-ratio"))
+ g_object_set (G_OBJECT (priv->overlay), "force-aspect-ratio", TRUE, NULL);
+
+ if (g_object_class_find_property (
+ G_OBJECT_GET_CLASS (priv->overlay), "sync"))
+ g_object_set (G_OBJECT (priv->overlay), "sync", priv->sync, NULL);
+
+ if (g_object_class_find_property (G_OBJECT_GET_CLASS (priv->overlay),
+ "async"))
+ g_object_set (G_OBJECT (priv->overlay), "async", priv->async, NULL);
+}
+
+static void
+empathy_video_widget_element_set_sink_properties (EmpathyVideoWidget *self)
+{
+ EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+
+ g_mutex_lock (priv->lock);
+ empathy_video_widget_element_set_sink_properties_unlocked (self);
+ g_mutex_unlock (priv->lock);
+}
+
+static void
+empathy_video_widget_element_added_cb (FsElementAddedNotifier *notifier,
+ GstBin *bin, GstElement *element, EmpathyVideoWidget *self)
+{
+ EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+
+ /* We assume the overlay is the sink */
+ g_mutex_lock (priv->lock);
+ if (priv->overlay == NULL && GST_IS_X_OVERLAY (element))
+ {
+ priv->overlay = element;
+ g_object_add_weak_pointer (G_OBJECT (element),
+ (gpointer) &priv->overlay);
+ empathy_video_widget_element_set_sink_properties_unlocked (self);
+ gst_x_overlay_expose (GST_X_OVERLAY (priv->overlay));
+ }
+ g_mutex_unlock (priv->lock);
+}
+
+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"))
+ {
+ g_assert (gtk_widget_get_realized (GTK_WIDGET (self)));
+ gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (priv->overlay),
+ GDK_WINDOW_XID (gtk_widget_get_window (GTK_WIDGET (self))));
+ }
+}
+
+static gboolean
+empathy_video_widget_draw (GtkWidget *widget,
+ cairo_t *cr)
+{
+ EmpathyVideoWidget *self = EMPATHY_VIDEO_WIDGET (widget);
+ EmpathyVideoWidgetPriv *priv = GET_PRIV (self);
+ GtkAllocation allocation;
+
+ if (priv->overlay == NULL)
+ {
+ gtk_widget_get_allocation (widget, &allocation);
+
+ gtk_render_frame (gtk_widget_get_style_context (widget), cr,
+ 0, 0,
+ gtk_widget_get_allocated_width (widget),
+ gtk_widget_get_allocated_height (widget));
+ return TRUE;
+ }
+
+ gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (priv->overlay),
+ GDK_WINDOW_XID (gtk_widget_get_window (widget)));
+
+ gst_x_overlay_expose (GST_X_OVERLAY (priv->overlay));
+
+ return TRUE;
+}
+
+GtkWidget *
+empathy_video_widget_new_with_size (GstBus *bus, gint width, gint height)
+{
+ g_return_val_if_fail (bus != NULL, NULL);
+
+ return GTK_WIDGET (g_object_new (EMPATHY_TYPE_VIDEO_WIDGET,
+ "gst-bus", bus,
+ "min-width", width,
+ "min-height", height,
+ NULL));
+}
+
+GtkWidget *
+empathy_video_widget_new (GstBus *bus)
+{
+ g_return_val_if_fail (bus != NULL, NULL);
+
+ return GTK_WIDGET (g_object_new (EMPATHY_TYPE_VIDEO_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;
+}