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1 /*
2  * Copyright (C) 2011 Collabora Ltd.
3  *
4  * The code contained in this file is free software; you can redistribute
5  * it and/or modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either version
7  * 2.1 of the License, or (at your option) any later version.
8  *
9  * This file is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this code; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17  *
18  * Authors: Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>
19  */
20
21 #include "config.h"
22
23 #include <glib/gi18n.h>
24
25 #include <gtk/gtk.h>
26 #include <pulse/pulseaudio.h>
27
28 #include <telepathy-glib/telepathy-glib.h>
29
30 #include "empathy-call-utils.h"
31
32 #include <libempathy/empathy-gsettings.h>
33 #include <libempathy/empathy-request-util.h>
34
35 #define DEBUG_FLAG EMPATHY_DEBUG_OTHER
36 #include <libempathy/empathy-debug.h>
37
38 static const gchar *
39 get_error_display_message (GError *error)
40 {
41   if (error->domain != TP_ERROR)
42     return _("There was an error starting the call");
43
44   switch (error->code)
45     {
46       case TP_ERROR_NETWORK_ERROR:
47         return _("Network error");
48       case TP_ERROR_NOT_CAPABLE:
49         return _("The specified contact doesn't support calls");
50       case TP_ERROR_OFFLINE:
51         return _("The specified contact is offline");
52       case TP_ERROR_INVALID_HANDLE:
53         return _("The specified contact is not valid");
54       case TP_ERROR_EMERGENCY_CALLS_NOT_SUPPORTED:
55         return _("Emergency calls are not supported on this protocol");
56       case TP_ERROR_INSUFFICIENT_BALANCE:
57         return _("You don't have enough credit in order to place this call");
58     }
59
60   return _("There was an error starting the call");
61 }
62
63 static void
64 show_call_error (GError *error)
65 {
66   GtkWidget *dialog;
67
68   dialog = gtk_message_dialog_new (NULL, 0,
69       GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE,
70       "%s", get_error_display_message (error));
71
72   g_signal_connect_swapped (dialog, "response",
73       G_CALLBACK (gtk_widget_destroy),
74       dialog);
75
76   gtk_widget_show (dialog);
77 }
78
79 GHashTable *
80 empathy_call_create_call_request (const gchar *contact,
81     gboolean initial_audio,
82     gboolean initial_video)
83 {
84   return tp_asv_new (
85     TP_PROP_CHANNEL_CHANNEL_TYPE, G_TYPE_STRING,
86       TP_IFACE_CHANNEL_TYPE_CALL,
87     TP_PROP_CHANNEL_TARGET_HANDLE_TYPE, G_TYPE_UINT,
88       TP_HANDLE_TYPE_CONTACT,
89     TP_PROP_CHANNEL_TARGET_ID, G_TYPE_STRING,
90       contact,
91     TP_PROP_CHANNEL_TYPE_CALL_INITIAL_AUDIO, G_TYPE_BOOLEAN,
92       initial_audio,
93     TP_PROP_CHANNEL_TYPE_CALL_INITIAL_VIDEO, G_TYPE_BOOLEAN,
94       initial_video,
95     NULL);
96 }
97
98 GHashTable *
99 empathy_call_create_streamed_media_request (const gchar *contact,
100     gboolean initial_audio,
101     gboolean initial_video)
102 {
103   return tp_asv_new (
104     TP_PROP_CHANNEL_CHANNEL_TYPE, G_TYPE_STRING,
105       TP_IFACE_CHANNEL_TYPE_STREAMED_MEDIA,
106     TP_PROP_CHANNEL_TARGET_HANDLE_TYPE, G_TYPE_UINT,
107       TP_HANDLE_TYPE_CONTACT,
108     TP_PROP_CHANNEL_TARGET_ID, G_TYPE_STRING,
109       contact,
110     TP_PROP_CHANNEL_TYPE_STREAMED_MEDIA_INITIAL_AUDIO, G_TYPE_BOOLEAN,
111       initial_audio,
112     TP_PROP_CHANNEL_TYPE_STREAMED_MEDIA_INITIAL_VIDEO, G_TYPE_BOOLEAN,
113       initial_video,
114     NULL);
115 }
116
117 static void
118 create_streamed_media_channel_cb (GObject *source,
119     GAsyncResult *result,
120     gpointer user_data)
121 {
122   GError *error = NULL;
123
124   if (!tp_account_channel_request_create_channel_finish (
125            TP_ACCOUNT_CHANNEL_REQUEST (source),
126            result,
127            &error))
128     {
129       DEBUG ("Failed to create StreamedMedia channel: %s", error->message);
130       show_call_error (error);
131       g_error_free (error);
132     }
133 }
134
135 #ifdef HAVE_CALL
136 static void
137 create_call_channel_cb (GObject *source,
138     GAsyncResult *result,
139     gpointer user_data)
140 {
141   TpAccountChannelRequest *streamed_media_req = user_data;
142   GError *error = NULL;
143
144   if (tp_account_channel_request_create_channel_finish (
145       TP_ACCOUNT_CHANNEL_REQUEST (source), result, &error))
146     {
147       g_object_unref (streamed_media_req);
148       return;
149     }
150
151   DEBUG ("Failed to create Call channel: %s", error->message);
152
153   if (error->code != TP_ERROR_NOT_IMPLEMENTED)
154     {
155       show_call_error (error);
156       return;
157     }
158
159   DEBUG ("Let's try with an StreamedMedia channel");
160   g_error_free (error);
161   tp_account_channel_request_create_channel_async (streamed_media_req,
162       EMPATHY_AV_BUS_NAME, NULL,
163       create_streamed_media_channel_cb,
164       NULL);
165 }
166
167 /* Try to request a Call channel and fallback to StreamedMedia if that fails */
168 static void
169 call_new_with_streams (const gchar *contact,
170     TpAccount *account,
171     gboolean initial_audio,
172     gboolean initial_video,
173     gint64 timestamp)
174 {
175   GHashTable *call_request, *streamed_media_request;
176   TpAccountChannelRequest *call_req, *streamed_media_req;
177
178   /* Call */
179   call_request = empathy_call_create_call_request (contact,
180       initial_audio,
181       initial_video);
182
183   call_req = tp_account_channel_request_new (account, call_request, timestamp);
184
185   g_hash_table_unref (call_request);
186
187   /* StreamedMedia */
188   streamed_media_request = empathy_call_create_streamed_media_request (
189       contact, initial_audio, initial_video);
190
191   streamed_media_req = tp_account_channel_request_new (account,
192       streamed_media_request,
193       timestamp);
194
195   g_hash_table_unref (streamed_media_request);
196
197   tp_account_channel_request_create_channel_async (call_req,
198       EMPATHY_CALL_BUS_NAME, NULL,
199       create_call_channel_cb,
200       streamed_media_req);
201
202   g_object_unref (call_req);
203 }
204
205 #else /* HAVE_CALL */
206
207 static void
208 sm_new_with_streams (const gchar *contact,
209     TpAccount *account,
210     gboolean initial_audio,
211     gboolean initial_video,
212     gint64 timestamp)
213 {
214   GHashTable *streamed_media_request;
215   TpAccountChannelRequest *streamed_media_req;
216
217   /* StreamedMedia */
218   streamed_media_request = empathy_call_create_streamed_media_request (
219       contact, initial_audio, initial_video);
220
221   streamed_media_req = tp_account_channel_request_new (account,
222       streamed_media_request,
223       timestamp);
224
225   g_hash_table_unref (streamed_media_request);
226
227   tp_account_channel_request_create_channel_async (streamed_media_req,
228       EMPATHY_AV_BUS_NAME, NULL, create_streamed_media_channel_cb, NULL);
229
230   g_object_unref (streamed_media_req);
231 }
232 #endif /* HAVE_CALL */
233
234 void
235 empathy_call_new_with_streams (const gchar *contact,
236     TpAccount *account,
237     gboolean initial_audio,
238     gboolean initial_video,
239     gint64 timestamp)
240 {
241 #ifdef HAVE_CALL
242   call_new_with_streams (contact, account, initial_audio, initial_video,
243       timestamp);
244 #else
245   sm_new_with_streams (contact, account, initial_audio, initial_video,
246       timestamp);
247 #endif
248 }
249
250 void
251 empathy_call_set_stream_properties (GstElement *element,
252   gboolean echo_cancellation)
253 {
254   GstStructure *props;
255   GSettings *gsettings_call;
256   gboolean echo_cancellation_setting;
257
258   gsettings_call = g_settings_new (EMPATHY_PREFS_CALL_SCHEMA);
259
260   echo_cancellation_setting = g_settings_get_boolean (gsettings_call,
261       EMPATHY_PREFS_CALL_ECHO_CANCELLATION);
262
263   DEBUG ("Echo cancellation: element allowed: %s, user enabled: %s",
264     echo_cancellation ? " yes" : "no",
265     echo_cancellation_setting ? " yes" : "no");
266
267
268   props = gst_structure_new ("props",
269       PA_PROP_MEDIA_ROLE, G_TYPE_STRING, "phone",
270       NULL);
271
272   if (echo_cancellation && echo_cancellation_setting)
273     {
274       gst_structure_set (props,
275           "filter.want", G_TYPE_STRING, "echo-cancel",
276           NULL);
277     }
278
279   g_object_set (element, "stream-properties", props, NULL);
280   gst_structure_free (props);
281
282   g_object_unref (gsettings_call);
283 }
284
285 /* Copied from telepathy-yell call-channel.c */
286 void
287 empathy_call_channel_send_video (TpCallChannel *self,
288     gboolean send)
289 {
290   GPtrArray *contents;
291   gboolean found = FALSE;
292   guint i;
293
294   g_return_if_fail (TP_IS_CALL_CHANNEL (self));
295
296   /* Loop over all the contents, if some of them a video set all their
297    * streams to sending, otherwise request a video channel in case we want to
298    * sent */
299   contents = tp_call_channel_get_contents (self);
300   for (i = 0 ; i < contents->len ; i++)
301     {
302       TpCallContent *content = g_ptr_array_index (contents, i);
303
304       if (tp_call_content_get_media_type (content) ==
305               TP_MEDIA_STREAM_TYPE_VIDEO)
306         {
307           GPtrArray *streams;
308           guint j;
309
310           found = TRUE;
311           streams = tp_call_content_get_streams (content);
312           for (j = 0; j < streams->len; j++)
313             {
314               TpCallStream *stream = g_ptr_array_index (streams, j);
315
316               tp_call_stream_set_sending_async (stream, send, NULL, NULL);
317             }
318         }
319     }
320
321   if (send && !found)
322     {
323       tp_call_channel_add_content_async (self, "video",
324           TP_MEDIA_STREAM_TYPE_VIDEO, TP_MEDIA_STREAM_DIRECTION_BIDIRECTIONAL,
325           NULL, NULL);
326     }
327 }
328
329 /* Copied from telepathy-yell call-channel.c */
330 TpSendingState
331 empathy_call_channel_get_video_state (TpCallChannel *self)
332 {
333   TpSendingState result = TP_SENDING_STATE_NONE;
334   GPtrArray *contents;
335   guint i;
336
337   g_return_val_if_fail (TP_IS_CALL_CHANNEL (self), TP_SENDING_STATE_NONE);
338
339   contents = tp_call_channel_get_contents (self);
340   for (i = 0 ; i < contents->len ; i++)
341     {
342       TpCallContent *content = g_ptr_array_index (contents, i);
343
344       if (tp_call_content_get_media_type (content) ==
345               TP_MEDIA_STREAM_TYPE_VIDEO)
346         {
347           GPtrArray *streams;
348           guint j;
349
350           streams = tp_call_content_get_streams (content);
351           for (j = 0; j < streams->len; j++)
352             {
353               TpCallStream *stream = g_ptr_array_index (streams, j);
354               TpSendingState state;
355
356               state = tp_call_stream_get_local_sending_state (stream);
357               if (state != TP_SENDING_STATE_PENDING_STOP_SENDING &&
358                   state > result)
359                 result = state;
360             }
361         }
362     }
363
364   return result;
365 }