Initial Voice+Video support Fixes bug #468204 (Elliot Fairweather, Xavier

2007-09-29  Xavier Claessens  <xclaesse@gmail.com>

	* libempathy-gtk/empathy-call-window.c:
	* libempathy-gtk/empathy-call-window.h:
	* libempathy-gtk/empathy-contact-list-view.c:
	* libempathy-gtk/empathy-call-window.glade:
	* libempathy-gtk/Makefile.am:
	* libempathy-gtk/empathy-chat-window.c:
	* src/empathy-call-chandler.c:
	* src/empathy-call.chandler:
	* src/org.gnome.Empathy.Call.service.in:
	* src/Makefile.am:
	* libempathy/empathy-utils.c:
	* libempathy/empathy-utils.h:
	* libempathy/empathy-tp-call.c:
	* libempathy/empathy-tp-call.h:
	* libempathy/Makefile.am:
	* libempathy/tp-stream-engine.xml:
	* configure.ac:
	* doc/libempathy-gtk/libempathy-gtk-docs.sgml:
	* doc/libempathy/libempathy.types:
	* doc/libempathy/libempathy-docs.sgml:
	* doc/libempathy/Makefile.am:
	* doc/libempathy/tmpl/empathy-utils.sgml: Initial Voice+Video support
	Fixes bug #468204 (Elliot Fairweather, Xavier Claessens).


svn path=/trunk/; revision=339

6 files changed, 869 insertions, 1 deletions

diff --git a/libempathy/Makefile.am b/libempathy/Makefile.am
index 9dc4021e2..0480d0bff 100644
--- a/libempathy/Makefile.am
+++ b/libempathy/Makefile.am
@@ -34,6 +34,7 @@ libempathy_la_SOURCES =					\
 	empathy-tp-chat.c				\
 	empathy-tp-chatroom.c				\
 	empathy-tp-roomlist.c				\
+	empathy-tp-call.c				\
 	empathy-chandler.c				\
 	empathy-filter.c				\
 	empathy-idle.c					\
@@ -68,10 +69,12 @@ libempathy_headers =				\
 	empathy-tp-chat.h			\
 	empathy-tp-chatroom.h			\
 	empathy-tp-roomlist.h			\
+	empathy-tp-call.h			\
 	empathy-chandler.h			\
 	empathy-filter.h			\
 	empathy-idle.h				\
-	empathy-log-manager.h
+	empathy-log-manager.h			\
+	tp-stream-engine-gen.h
 
 libempathy_includedir = $(includedir)/libempathy/
 libempathy_include_HEADERS =			\
@@ -90,6 +93,10 @@ empathy-chandler-glue.h: empathy-chandler.xml Makefile
 empathy-filter-glue.h: empathy-filter.xml Makefile
 	$(LIBTOOL) --mode=execute $(DBUS_BINDING_TOOL) --prefix=empathy_filter --mode=glib-server --output=$@ $<
 
+tp-stream-engine-gen.h: tp-stream-engine.xml Makefile.am
+	$(LIBTOOL) --mode=execute $(DBUS_BINDING_TOOL) --prefix=tp_stream_engine --mode=glib-client --output=$@ $<
+
+
 empathy-enum-types.h: stamp-empathy-enum-types.h
 	@true
 stamp-empathy-enum-types.h: $(libempathy_headers) Makefile
diff --git a/libempathy/empathy-tp-call.c b/libempathy/empathy-tp-call.c
new file mode 100644
index 000000000..e0347ba9a
--- /dev/null
+++ b/libempathy/empathy-tp-call.c
@@ -0,0 +1,655 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Copyright (C) 2007 Elliot Fairweather
+ * Copyright (C) 2007 Collabora Ltd.
+ *
+ * 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
+ *
+ * Authors: Elliot Fairweather <elliot.fairweather@collabora.co.uk>
+ *          Xavier Claessens <xclaesse@gmail.com>
+ */
+
+#include "config.h"
+
+#include <libtelepathy/tp-chan-type-streamed-media-gen.h>
+#include <libtelepathy/tp-helpers.h>
+#include <libtelepathy/tp-conn.h>
+
+#include <libmissioncontrol/mission-control.h>
+
+#include "empathy-tp-call.h"
+#include "empathy-tp-group.h"
+#include "empathy-utils.h"
+#include "empathy-debug.h"
+#include "empathy-enum-types.h"
+#include "tp-stream-engine-gen.h"
+
+#define DEBUG_DOMAIN "TpCall"
+
+#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), EMPATHY_TYPE_TP_CALL, EmpathyTpCallPriv))
+
+#define STREAM_ENGINE_BUS_NAME "org.freedesktop.Telepathy.StreamEngine"
+#define STREAM_ENGINE_OBJECT_PATH "/org/freedesktop/Telepathy/StreamEngine"
+#define STREAM_ENGINE_INTERFACE "org.freedesktop.Telepathy.StreamEngine"
+#define CHANNEL_HANDLER_INTERFACE "org.freedesktop.Telepathy.ChannelHandler"
+
+typedef struct _EmpathyTpCallPriv EmpathyTpCallPriv;
+
+struct _EmpathyTpCallPriv {
+	TpChan              *tp_chan;
+	DBusGProxy          *streamed_iface;
+	DBusGProxy          *se_ch_proxy;
+	DBusGProxy          *se_proxy;
+	McAccount           *account;
+	EmpathyTpGroup      *group;
+  	EmpathyContact      *contact;
+	EmpathyTpCallStatus  status;
+	gboolean             is_incoming;
+	guint                audio_stream;
+	guint                video_stream;
+};
+
+static void empathy_tp_call_class_init (EmpathyTpCallClass *klass);
+static void empathy_tp_call_init       (EmpathyTpCall      *call);
+
+enum {
+	PROP_0,
+	PROP_ACCOUNT,
+	PROP_TP_CHAN,
+	PROP_STATUS
+};
+
+enum {
+	DESTROY,
+	LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
+
+G_DEFINE_TYPE (EmpathyTpCall, empathy_tp_call, G_TYPE_OBJECT)
+
+static void
+tp_call_set_status (EmpathyTpCall       *call,
+		    EmpathyTpCallStatus  status)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	priv->status = status;
+	g_object_notify (G_OBJECT (call), "status");
+}
+
+static void
+tp_call_set_property (GObject      *object,
+		      guint         prop_id,
+		      const GValue *value,
+		      GParamSpec   *pspec)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (object);
+
+	switch (prop_id) {
+	case PROP_ACCOUNT:
+        	priv->account = g_object_ref (g_value_get_object (value));
+		break;
+	case PROP_TP_CHAN:
+        	priv->tp_chan = g_object_ref (g_value_get_object (value));
+		break;
+	case PROP_STATUS:
+		tp_call_set_status (EMPATHY_TP_CALL (object),
+				    g_value_get_enum (value));
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+static void
+tp_call_get_property (GObject    *object,
+		      guint       prop_id,
+		      GValue     *value,
+		      GParamSpec *pspec)
+{
+  EmpathyTpCallPriv *priv = GET_PRIV (object);
+
+	switch (prop_id) {
+	case PROP_ACCOUNT:
+        	g_value_set_object (value, priv->account);
+		break;
+	case PROP_TP_CHAN:
+        	g_value_set_object (value, priv->tp_chan);
+		break;
+	case PROP_STATUS:
+		g_value_set_enum (value, priv->status);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+static void
+tp_call_destroy_cb (TpChan        *call_chan,
+		    EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	empathy_debug (DEBUG_DOMAIN, "Channel Closed or CM crashed");
+
+	g_object_unref  (priv->tp_chan);
+	priv->tp_chan = NULL;
+	priv->streamed_iface = NULL;
+
+	g_signal_emit (call, signals[DESTROY], 0);
+}
+
+static void
+tp_call_closed_cb (TpChan        *call_chan,
+		   EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	/* The channel is closed, do just like if the proxy was destroyed */
+	g_signal_handlers_disconnect_by_func (priv->tp_chan,
+					      tp_call_destroy_cb,
+					      call);
+	tp_call_destroy_cb (call_chan, call);
+}
+
+static void
+tp_call_stream_added_cb (DBusGProxy    *streamed_iface,
+			 guint          stream_id,
+			 guint          contact_handle,
+			 guint          stream_type,
+			 EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	empathy_debug (DEBUG_DOMAIN, "Stream added: id=%d, stream_type=%d",
+		       stream_id, stream_type);
+
+	switch (stream_type) {
+	case TP_MEDIA_STREAM_TYPE_AUDIO:
+		priv->audio_stream = stream_id;
+		break;
+	case TP_MEDIA_STREAM_TYPE_VIDEO:
+		priv->video_stream = stream_id;
+		break;
+	default:
+		empathy_debug (DEBUG_DOMAIN, "Unknown stream type: %d", stream_type);
+	}
+}
+
+
+static void
+tp_call_stream_removed_cb (DBusGProxy    *streamed_iface,
+			   guint          stream_id,
+			   EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	empathy_debug (DEBUG_DOMAIN, "Stream removed: %d", stream_id);
+
+	if (stream_id == priv->audio_stream) {
+		priv->audio_stream = 0;
+	}
+	else if (stream_id == priv->video_stream) {
+		priv->video_stream = 0;
+	}
+}
+
+static void
+tp_call_list_streams_cb (DBusGProxy *proxy,
+			 GPtrArray  *streams,
+			 GError     *error,
+			 gpointer    user_data)
+{
+	guint i;
+
+	if (error) {
+		empathy_debug (DEBUG_DOMAIN, "Failed to list streams: %s",
+			       error->message);
+		return;
+	}
+
+	for (i = 0; i < streams->len; i++) {
+		GValueArray *values;
+		guint        stream_id;
+		guint        contact_handle;
+		guint        stream_type;
+
+		values = g_ptr_array_index (streams, i);
+		stream_id = g_value_get_uint (g_value_array_get_nth (values, 0));
+		contact_handle = g_value_get_uint (g_value_array_get_nth (values, 1));
+		stream_type = g_value_get_uint (g_value_array_get_nth (values, 2));
+
+		tp_call_stream_added_cb (proxy,
+					 stream_id,
+					 contact_handle,
+					 stream_type,
+					 user_data);
+	}
+}
+
+static void
+tp_call_member_added_cb (EmpathyTpGroup *group,
+			 EmpathyContact *contact,
+			 EmpathyContact *actor,
+			 guint           reason,
+			 const gchar    *message,
+			 EmpathyTpCall  *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	empathy_debug (DEBUG_DOMAIN, "Members added %s (%d)",
+		       empathy_contact_get_id (contact),
+		       empathy_contact_get_handle (contact));
+
+	if (!priv->contact) {
+		if (!empathy_contact_is_user (contact)) {
+			priv->is_incoming = TRUE;
+			priv->contact = g_object_ref (contact);
+			tp_call_set_status (call, EMPATHY_TP_CALL_STATUS_RINGING);
+		}
+		return;
+	}
+
+	/* We already have the other contact, that means we now have 2 members,
+	 * so we can start the call */
+	tp_call_set_status (call, EMPATHY_TP_CALL_STATUS_RUNNING);
+}
+
+static void
+tp_call_remote_pending_cb (EmpathyTpGroup *group,
+			   EmpathyContact *contact,
+			   EmpathyContact *actor,
+			   guint           reason,
+			   const gchar    *message,
+			   EmpathyTpCall  *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	empathy_debug (DEBUG_DOMAIN, "Remote pending: %s (%d)",
+		       empathy_contact_get_id (contact),
+		       empathy_contact_get_handle (contact));
+
+	if (!priv->contact) {
+		priv->is_incoming = FALSE;
+		priv->contact = g_object_ref (contact);
+		tp_call_set_status (call, EMPATHY_TP_CALL_STATUS_RINGING);
+	}
+}
+
+static void
+tp_call_async_cb (DBusGProxy *proxy,
+		  GError     *error,
+		  gpointer    user_data)
+{
+	if (error) {
+		empathy_debug (DEBUG_DOMAIN, "Failed to %s: %s",
+			       user_data,
+			       error->message);
+	}
+}
+
+static GObject *
+tp_call_constructor (GType                  type,
+		     guint                  n_props,
+		     GObjectConstructParam *props)
+{
+	GObject           *call;
+	EmpathyTpCallPriv *priv;
+	TpConn            *tp_conn;
+	MissionControl    *mc;
+
+	call = G_OBJECT_CLASS (empathy_tp_call_parent_class)->constructor (type, n_props, props);
+	priv = GET_PRIV (call);
+
+	priv->group = empathy_tp_group_new (priv->account, priv->tp_chan);
+	priv->streamed_iface = tp_chan_get_interface (priv->tp_chan,
+						      TELEPATHY_CHAN_IFACE_STREAMED_QUARK);
+
+	/* Connect signals */
+	dbus_g_proxy_connect_signal (priv->streamed_iface, "StreamAdded",
+				     G_CALLBACK (tp_call_stream_added_cb),
+				     call, NULL);
+	dbus_g_proxy_connect_signal (priv->streamed_iface, "StreamRemoved",
+				     G_CALLBACK (tp_call_stream_removed_cb), 
+				     call, NULL);
+	dbus_g_proxy_connect_signal (DBUS_G_PROXY (priv->tp_chan), "Closed",
+				     G_CALLBACK (tp_call_closed_cb),
+				     call, NULL);
+	g_signal_connect (priv->tp_chan, "destroy",
+			  G_CALLBACK (tp_call_destroy_cb),
+			  call);
+	g_signal_connect (priv->group, "member-added",
+			  G_CALLBACK (tp_call_member_added_cb),
+			  call);
+	g_signal_connect (priv->group, "remote-pending",
+			  G_CALLBACK (tp_call_remote_pending_cb),
+			  call);
+
+	/* Start stream engine */
+	mc = empathy_mission_control_new ();
+	tp_conn = mission_control_get_connection (mc, priv->account, NULL);
+	priv->se_ch_proxy = dbus_g_proxy_new_for_name (tp_get_bus (),
+						       STREAM_ENGINE_BUS_NAME,
+						       STREAM_ENGINE_OBJECT_PATH,
+						       CHANNEL_HANDLER_INTERFACE);
+	priv->se_proxy = dbus_g_proxy_new_for_name (tp_get_bus (),
+						    STREAM_ENGINE_BUS_NAME,
+						    STREAM_ENGINE_OBJECT_PATH,
+						    STREAM_ENGINE_INTERFACE);
+	org_freedesktop_Telepathy_ChannelHandler_handle_channel_async (priv->se_ch_proxy,
+		dbus_g_proxy_get_bus_name (DBUS_G_PROXY (tp_conn)),
+		dbus_g_proxy_get_path (DBUS_G_PROXY (tp_conn)),
+		priv->tp_chan->type,
+		dbus_g_proxy_get_path (DBUS_G_PROXY (priv->tp_chan)),
+		priv->tp_chan->handle_type,
+		priv->tp_chan->handle,
+		tp_call_async_cb,
+		"handle channel");
+	g_object_unref (tp_conn);
+	g_object_unref (mc);
+
+	/* Get streams */
+	tp_chan_type_streamed_media_list_streams_async (priv->streamed_iface,
+							tp_call_list_streams_cb,
+							call);
+
+	return call;
+}
+
+static void
+tp_call_finalize (GObject *object)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (object);
+
+	empathy_debug (DEBUG_DOMAIN, "Finalizing: %p", object);
+
+	if (priv->tp_chan) {
+		GError *error;
+
+		g_signal_handlers_disconnect_by_func (priv->tp_chan,
+						      tp_call_destroy_cb,
+						      object);
+		empathy_debug (DEBUG_DOMAIN, "Closing channel...");
+		if (!tp_chan_close (DBUS_G_PROXY (priv->tp_chan), &error)) {
+			empathy_debug (DEBUG_DOMAIN, 
+				      "Error closing text channel: %s",
+				      error ? error->message : "No error given");
+			g_clear_error (&error);
+		}
+		g_object_unref (priv->tp_chan);
+	}
+
+	g_object_unref (priv->group);
+	g_object_unref (priv->contact);
+	g_object_unref (priv->account);
+	g_object_unref (priv->se_ch_proxy);
+	g_object_unref (priv->se_proxy);
+
+	G_OBJECT_CLASS (empathy_tp_call_parent_class)->finalize (object);
+}
+
+static void
+empathy_tp_call_class_init (EmpathyTpCallClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+	object_class->constructor = tp_call_constructor;
+	object_class->finalize = tp_call_finalize;
+	object_class->set_property = tp_call_set_property;
+	object_class->get_property = tp_call_get_property;
+
+	/* Construct-only properties */
+	g_object_class_install_property (object_class,
+					 PROP_ACCOUNT,
+					 g_param_spec_object ("account",
+							      "channel Account",
+							      "The account associated with the channel",
+							      MC_TYPE_ACCOUNT,
+							      G_PARAM_READWRITE |
+							      G_PARAM_CONSTRUCT_ONLY));
+	g_object_class_install_property (object_class,
+					 PROP_TP_CHAN,
+					 g_param_spec_object ("tp-chan",
+							      "telepathy channel",
+							      "The media channel for the call",
+							      TELEPATHY_CHAN_TYPE,
+							      G_PARAM_READWRITE |
+							      G_PARAM_CONSTRUCT_ONLY));
+
+	/* Normal properties */
+	g_object_class_install_property (object_class,
+					 PROP_STATUS,
+					 g_param_spec_enum ("status",
+							    "call status",
+							    "The status of the call",
+							    EMPATHY_TYPE_TP_CALL_STATUS,
+							    EMPATHY_TP_CALL_STATUS_PREPARING,
+							    G_PARAM_READABLE));
+
+	/* Signals */
+	signals[DESTROY] =
+		g_signal_new ("destroy",
+			      G_TYPE_FROM_CLASS (klass),
+			      G_SIGNAL_RUN_LAST,
+			      0,
+			      NULL, NULL,
+			      g_cclosure_marshal_VOID__VOID,
+			      G_TYPE_NONE,
+			      0);
+
+
+	g_type_class_add_private (klass, sizeof (EmpathyTpCallPriv));
+}
+
+static void
+empathy_tp_call_init (EmpathyTpCall *call)
+{
+}
+
+EmpathyTpCall *
+empathy_tp_call_new (McAccount *account, TpChan *channel)
+{
+	return g_object_new (EMPATHY_TYPE_TP_CALL,
+			     "account", account,
+			     "tp_chan", channel,
+			     NULL);
+}
+
+gboolean
+empathy_tp_call_is_incoming (EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	return priv->is_incoming;
+}
+
+EmpathyTpCallStatus
+empathy_tp_call_get_status (EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	return priv->status;
+}
+
+EmpathyContact *
+empathy_tp_call_get_contact (EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	return priv->contact;
+}
+
+void
+empathy_tp_call_accept (EmpathyTpCall *call)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+	EmpathyContact    *contact;
+
+	contact = empathy_tp_group_get_self_contact (priv->group);
+	empathy_tp_group_add_member (priv->group, contact, "");
+}
+
+void
+empathy_tp_call_invite (EmpathyTpCall  *call,
+			EmpathyContact *contact)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	empathy_tp_group_add_member (priv->group, contact, "you're welcome");
+}
+
+void
+empathy_tp_call_request_streams (EmpathyTpCall *call,
+				 gboolean       audio,
+				 gboolean       video)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+	GArray            *stream_types;
+	guint              handle;
+	guint              type;
+
+	empathy_debug (DEBUG_DOMAIN, "Requesting streams for audio=%s video=%s",
+		       audio ? "Yes" : "No",
+		       video ? "Yes" : "No");
+
+	stream_types = g_array_new (FALSE, FALSE, sizeof (guint));
+	if (audio) {
+		type = TP_MEDIA_STREAM_TYPE_AUDIO;
+		g_array_append_val (stream_types, type);
+	}
+	if (video) {
+		type = TP_MEDIA_STREAM_TYPE_VIDEO;
+		g_array_append_val (stream_types, type);
+	}
+
+	handle = empathy_contact_get_handle (priv->contact);
+	tp_chan_type_streamed_media_request_streams_async (priv->streamed_iface,
+							   handle,
+							   stream_types,
+							   tp_call_list_streams_cb,
+							   call);
+
+	g_array_free (stream_types, TRUE);
+}
+
+void
+empathy_tp_call_send_video (EmpathyTpCall *call,
+			    gboolean       send)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+	guint              new_direction;
+
+	if (!priv->video_stream) {
+		return;
+	}
+
+	if (send) {
+		new_direction = TP_MEDIA_STREAM_DIRECTION_BIDIRECTIONAL;
+	} else {
+		new_direction = TP_MEDIA_STREAM_DIRECTION_RECEIVE;
+	}
+
+	tp_chan_type_streamed_media_request_stream_direction_async (priv->streamed_iface,
+								    priv->video_stream,
+								    new_direction,
+								    tp_call_async_cb,
+								    "request stream direction");
+}
+
+void
+empathy_tp_call_add_preview_window (EmpathyTpCall *call,
+				    guint          socket_id)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	org_freedesktop_Telepathy_StreamEngine_add_preview_window_async (priv->se_proxy,
+									 socket_id,
+									 tp_call_async_cb,
+									 "add preview window");
+}
+
+void
+empathy_tp_call_remove_preview_window (EmpathyTpCall *call,
+				       guint          socket_id)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	org_freedesktop_Telepathy_StreamEngine_remove_preview_window_async (priv->se_proxy,
+									    socket_id,
+									    tp_call_async_cb,
+									    "remove preview window");
+}
+
+void
+empathy_tp_call_set_output_window (EmpathyTpCall *call,
+				   guint          socket_id)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	org_freedesktop_Telepathy_StreamEngine_set_output_window_async (priv->se_proxy,
+									dbus_g_proxy_get_path (DBUS_G_PROXY (priv->tp_chan)),
+									priv->video_stream,
+									socket_id,
+									tp_call_async_cb,
+									"set output window");
+}
+
+void
+empathy_tp_call_set_output_volume (EmpathyTpCall *call,
+				   guint          volume)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	org_freedesktop_Telepathy_StreamEngine_set_output_volume_async (priv->se_proxy,
+									dbus_g_proxy_get_path (DBUS_G_PROXY (priv->tp_chan)),
+									priv->audio_stream,
+									volume,
+									tp_call_async_cb,
+									"set output volume");
+}
+
+
+void
+empathy_tp_call_mute_output (EmpathyTpCall *call,
+                             gboolean       is_muted)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	org_freedesktop_Telepathy_StreamEngine_mute_output_async (priv->se_proxy,
+								  dbus_g_proxy_get_path (DBUS_G_PROXY (priv->tp_chan)),
+								  priv->audio_stream,
+								  is_muted,
+								  tp_call_async_cb,
+								  "mute output");
+}
+
+
+void
+empathy_tp_call_mute_input (EmpathyTpCall *call,
+                            gboolean       is_muted)
+{
+	EmpathyTpCallPriv *priv = GET_PRIV (call);
+
+	org_freedesktop_Telepathy_StreamEngine_mute_input_async (priv->se_proxy,
+								 dbus_g_proxy_get_path (DBUS_G_PROXY (priv->tp_chan)),
+								 priv->audio_stream,
+								 is_muted,
+								 tp_call_async_cb,
+								 "mute output");
+}
+
diff --git a/libempathy/empathy-tp-call.h b/libempathy/empathy-tp-call.h
new file mode 100644
index 000000000..13ab33fcb
--- /dev/null
+++ b/libempathy/empathy-tp-call.h
@@ -0,0 +1,89 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Copyright (C) 2007 Elliot Fairweather
+ * Copyright (C) 2007 Collabora Ltd.
+ *
+ * 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
+ *
+ * Authors: Elliot Fairweather <elliot.fairweather@collabora.co.uk>
+ *          Xavier Claessens <xclaesse@gmail.com>
+ */
+
+#ifndef __EMPATHY_TP_CALL_H__
+#define __EMPATHY_TP_CALL_H__
+
+#include <libtelepathy/tp-chan.h>
+#include <libtelepathy/tp-constants.h>
+
+#include <libmissioncontrol/mc-account.h>
+
+#include "empathy-contact.h"
+
+G_BEGIN_DECLS
+
+#define EMPATHY_TYPE_TP_CALL              (empathy_tp_call_get_type ())
+#define EMPATHY_TP_CALL(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), EMPATHY_TYPE_TP_CALL, EmpathyTpCall))
+#define EMPATHY_TP_CALL_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST((klass), EMPATHY_TYPE_TP_CALL, EmpathyTpCallClass))
+#define EMPATHY_IS_TP_CALL(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), EMPATHY_TYPE_TP_CALL))
+#define EMPATHY_IS_TP_CALL_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), EMPATHY_TYPE_TP_CALL))
+#define EMPATHY_TP_CALL_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS ((object), EMPATHY_TYPE_TP_CALL, EmpathyTpCallClass))
+
+typedef struct _EmpathyTpCall EmpathyTpCall;
+typedef struct _EmpathyTpCallClass EmpathyTpCallClass;
+
+struct _EmpathyTpCall {
+	GObject parent;
+};
+
+struct _EmpathyTpCallClass {
+	GObjectClass parent_class;
+};
+
+typedef enum {
+	EMPATHY_TP_CALL_STATUS_PREPARING,
+	EMPATHY_TP_CALL_STATUS_RINGING,
+	EMPATHY_TP_CALL_STATUS_RUNNING
+} EmpathyTpCallStatus;
+
+GType               empathy_tp_call_get_type              (void) G_GNUC_CONST;
+EmpathyTpCall *     empathy_tp_call_new                   (McAccount      *account,
+							   TpChan         *tp_chan);
+gboolean            empathy_tp_call_is_incoming           (EmpathyTpCall  *call);
+EmpathyTpCallStatus empathy_tp_call_get_status            (EmpathyTpCall  *call);
+EmpathyContact *    empathy_tp_call_get_contact           (EmpathyTpCall  *call);
+void                empathy_tp_call_accept                (EmpathyTpCall  *call);
+void                empathy_tp_call_invite                (EmpathyTpCall  *call,
+							   EmpathyContact *contact);
+void                empathy_tp_call_request_streams       (EmpathyTpCall  *call,
+							   gboolean        audio,
+							   gboolean        video);
+void                empathy_tp_call_send_video            (EmpathyTpCall  *call,
+							   gboolean        send);
+void                empathy_tp_call_add_preview_window    (EmpathyTpCall  *call,
+							   guint           socket_id);
+void                empathy_tp_call_remove_preview_window (EmpathyTpCall  *call,
+							   guint           socket_id);
+void                empathy_tp_call_set_output_window     (EmpathyTpCall  *call,
+							   guint           socket_id);
+void                empathy_tp_call_set_output_volume     (EmpathyTpCall  *call,
+							   guint           volume);
+void                empathy_tp_call_mute_output           (EmpathyTpCall  *call,
+							   gboolean        is_muted);
+void                empathy_tp_call_mute_input            (EmpathyTpCall  *call,
+							   gboolean        is_muted);
+
+G_END_DECLS
+
+#endif /* __EMPATHY_TP_CALL_H__ */
diff --git a/libempathy/empathy-utils.c b/libempathy/empathy-utils.c
index e0c6cfc9d..f33d83e48 100644
--- a/libempathy/empathy-utils.c
+++ b/libempathy/empathy-utils.c
@@ -38,6 +38,7 @@
 #include "empathy-debug.h"
 #include "empathy-utils.h"
 #include "empathy-contact-manager.h"
+#include "empathy-tp-group.h"
 
 #define DEBUG_DOMAIN "Utils"
 
@@ -462,3 +463,64 @@ empathy_inspect_handle (McAccount *account,
 	return name;
 }
 
+void
+empathy_call_contact (EmpathyContact *contact)
+{
+#ifdef HAVE_VOIP
+	MissionControl *mc;
+	McAccount      *account;
+	TpConn         *tp_conn;
+	gchar          *object_path;
+	const gchar    *bus_name;
+	TpChan         *new_chan;
+	EmpathyTpGroup *group;
+	GError         *error;
+
+	/* StreamedMedia channels must have handle=0 and handle_type=none.
+	 * To call a contact we have to add him in the group interface of the
+	 * channel. MissionControl will detect the channel creation and 
+	 * dispatch it to the VoIP chandler automatically. */
+
+	mc = empathy_mission_control_new ();
+	account = empathy_contact_get_account (contact);
+	tp_conn = mission_control_get_connection (mc, account, NULL);
+	/* FIXME: Should be async */
+	if (!tp_conn_request_channel (DBUS_G_PROXY (tp_conn),
+				      TP_IFACE_CHANNEL_TYPE_STREAMED_MEDIA,
+				      TP_HANDLE_TYPE_NONE,
+				      0,
+				      FALSE,
+				      &object_path,
+				      &error)) {
+		empathy_debug (DEBUG_DOMAIN, 
+			      "Couldn't request channel: %s",
+			      error ? error->message : "No error given");
+		g_clear_error (&error);
+		g_object_unref (mc);
+		g_object_unref (tp_conn);
+		return;
+	}
+
+	bus_name = dbus_g_proxy_get_bus_name (DBUS_G_PROXY (tp_conn));
+	new_chan = tp_chan_new (tp_get_bus (),
+				bus_name,
+				object_path,
+				TP_IFACE_CHANNEL_TYPE_STREAMED_MEDIA,
+				TP_HANDLE_TYPE_NONE,
+				0);
+
+	/* FIXME: group is leaked, we can't unref it directly because
+	 * _add_member is async so we have to wait for it to return before
+	 * finalizing the group. I think EmpathyTpGroup should ref itself
+	 * when it does async calls to avoid finalizing when there is calls
+	 * in fligth like that we could unref it here. */
+	group = empathy_tp_group_new (account, new_chan);
+	empathy_tp_group_add_member (group, contact, "");
+
+	g_object_unref (mc);
+	g_object_unref (tp_conn);
+	g_object_unref (new_chan);
+	g_free (object_path);
+#endif
+}
+
diff --git a/libempathy/empathy-utils.h b/libempathy/empathy-utils.h
index 88d533728..587adaedc 100644
--- a/libempathy/empathy-utils.h
+++ b/libempathy/empathy-utils.h
@@ -91,6 +91,7 @@ gchar *      empathy_inspect_handle                 (McAccount       *account,
 						     guint            handle_type);
 gchar *      empathy_inspect_channel                (McAccount       *account,
 						     TpChan          *tp_chan);
+void         empathy_call_contact                   (EmpathyContact  *contact);
 G_END_DECLS
 
 #endif /*  __EMPATHY_UTILS_H__ */
diff --git a/libempathy/tp-stream-engine.xml b/libempathy/tp-stream-engine.xml
new file mode 100644
index 000000000..5a8783d0e
--- /dev/null
+++ b/libempathy/tp-stream-engine.xml
@@ -0,0 +1,54 @@
+<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+<node name="/TpMediaEngine">
+  <interface name="org.freedesktop.Telepathy.ChannelHandler">
+    <method name="HandleChannel">
+      <arg direction="in" type="s" name="bus_name" />
+      <arg direction="in" type="o" name="connection" />
+      <arg direction="in" type="s" name="channel_type" />
+      <arg direction="in" type="o" name="channel" />
+      <arg direction="in" type="u" name="handle_type" />
+      <arg direction="in" type="u" name="handle" />
+    </method>
+  </interface>
+  <interface name="org.freedesktop.Telepathy.StreamEngine">
+    <method name="SetOutputVolume">
+      <arg direction="in" type="o" name="channel_path" />
+      <arg direction="in" type="u" name="stream_id" />
+      <arg direction="in" type="u" name="volume" />
+    </method>
+    <method name="MuteInput">
+      <arg direction="in" type="o" name="channel_path" />
+      <arg direction="in" type="u" name="stream_id" />
+      <arg direction="in" type="b" name="mute_state" />
+    </method>
+    <method name="MuteOutput">
+      <arg direction="in" type="o" name="channel_path" />
+      <arg direction="in" type="u" name="stream_id" />
+      <arg direction="in" type="b" name="mute_state" />
+    </method>
+    <method name="SetOutputWindow">
+      <arg direction="in" type="o" name="channel_path" />
+      <arg direction="in" type="u" name="stream_id" />
+      <arg direction="in" type="u" name="window" />
+    </method>
+    <method name="AddPreviewWindow">
+      <arg direction="in" type="u" name="window" />
+    </method>
+    <method name="RemovePreviewWindow">
+      <arg direction="in" type="u" name="window" />
+    </method>
+    <signal name="Receiving">
+      <arg type="o" name="channel_path" />
+      <arg type="u" name="stream_id" />
+      <arg type="b" name="state" />
+    </signal>
+    <signal name="StreamStateChanged">
+      <arg type="o" name="channel_path" />
+      <arg type="u" name="stream_id" />
+      <arg type="u" name="state" />
+      <arg type="u" name="direction" />
+    </signal>
+    <method name="Shutdown">
+    </method>
+  </interface>
+</node>