evolution-3.6.4/modules/audio-inline/e-mail-formatter-audio-inline.c

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  1 /*
  2  * e-mail-formatter-audio-inline.c
  3  *
  4  * This program is free software; you can redistribute it and/or
  5  * modify it under the terms of the GNU Lesser General Public
  6  * License as published by the Free Software Foundation; either
  7  * version 2 of the License, or (at your option) version 3.
  8  *
  9  * This program 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 the program; if not, see <http://www.gnu.org/licenses/>
 16  *
 17  */
 18 
 19 #include "e-mail-formatter-audio-inline.h"
 20 
 21 #ifdef HAVE_CONFIG_H
 22 #include <config.h>
 23 #endif
 24 
 25 #include <glib/gi18n-lib.h>
 26 
 27 #include <libebackend/libebackend.h>
 28 
 29 #include <em-format/e-mail-formatter-extension.h>
 30 #include <em-format/e-mail-formatter.h>
 31 
 32 #include "e-util/e-mktemp.h"
 33 
 34 #include <camel/camel.h>
 35 #include <gst/gst.h>
 36 
 37 #include "e-mail-part-audio-inline.h"
 38 
 39 #define d(x)
 40 
 41 typedef struct _EMailFormatterAudioInline {
 42 	EExtension parent;
 43 } EMailFormatterAudioInline;
 44 
 45 typedef struct _EMailFormatterAudioInlineClass {
 46 	EExtensionClass parent_class;
 47 } EMailFormatterAudioInlineClass;
 48 
 49 GType e_mail_formatter_audio_inline_get_type (void);
 50 static void e_mail_formatter_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface);
 51 static void e_mail_formatter_mail_extension_interface_init (EMailExtensionInterface *iface);
 52 
 53 G_DEFINE_DYNAMIC_TYPE_EXTENDED (
 54 	EMailFormatterAudioInline,
 55 	e_mail_formatter_audio_inline,
 56 	E_TYPE_EXTENSION,
 57 	0,
 58 	G_IMPLEMENT_INTERFACE_DYNAMIC (
 59 		E_TYPE_MAIL_EXTENSION,
 60 		e_mail_formatter_mail_extension_interface_init)
 61 	G_IMPLEMENT_INTERFACE_DYNAMIC (
 62 		E_TYPE_MAIL_FORMATTER_EXTENSION,
 63 		e_mail_formatter_formatter_extension_interface_init));
 64 
 65 static const gchar * formatter_mime_types[] = { "application/vnd.evolution.widget.audio-inline",
 66 					       "audio/ac3", "audio/x-ac3",
 67 					       "audio/basic", "audio/mpeg",
 68 					       "audio/x-mpeg", "audio/mpeg3",
 69 					       "audio/x-mpeg3", "audio/mp3",
 70 					       "audio/x-mp3", "audio/mp4",
 71 					       "audio/flac", "audio/x-flac",
 72 					       "audio/mod", "audio/x-mod",
 73 					       "audio/x-wav", "audio/microsoft-wav",
 74 					       "audio/x-wma", "audio/x-ms-wma",
 75 					       "application/ogg", "application/x-ogg",
 76 					       NULL };
 77 
 78 static void
 79 pause_clicked (GtkWidget *button,
 80                EMailPartAudioInline *part)
 81 {
 82 	if (part->playbin) {
 83 		/* pause playing */
 84 		gst_element_set_state (part->playbin, GST_STATE_PAUSED);
 85 	}
 86 }
 87 
 88 static void
 89 stop_clicked (GtkWidget *button,
 90               EMailPartAudioInline *part)
 91 {
 92 	if (part->playbin) {
 93 		/* ready to play */
 94 		gst_element_set_state (part->playbin, GST_STATE_READY);
 95 		part->target_state = GST_STATE_READY;
 96 	}
 97 }
 98 
 99 static void
100 set_audiosink (GstElement *playbin)
101 {
102 	GstElement *audiosink;
103 
104 	/* now it's time to get the audio sink */
105 	audiosink = gst_element_factory_make ("gconfaudiosink", "play_audio");
106 	if (audiosink == NULL) {
107 		audiosink = gst_element_factory_make ("autoaudiosink", "play_audio");
108 	}
109 
110 	if (audiosink) {
111 		g_object_set (playbin, "audio-sink", audiosink, NULL);
112 	}
113 }
114 
115 static gboolean
116 gst_callback (GstBus *bus,
117               GstMessage *message,
118               gpointer data)
119 {
120 	EMailPartAudioInline *part = data;
121 	GstMessageType msg_type;
122 
123 	g_return_val_if_fail (part != NULL, TRUE);
124 	g_return_val_if_fail (part->playbin != NULL, TRUE);
125 
126 	msg_type = GST_MESSAGE_TYPE (message);
127 
128 	switch (msg_type) {
129 		case GST_MESSAGE_ERROR:
130 			gst_element_set_state (part->playbin, GST_STATE_NULL);
131 			break;
132 		case GST_MESSAGE_EOS:
133 			gst_element_set_state (part->playbin, GST_STATE_READY);
134 			break;
135 		case GST_MESSAGE_STATE_CHANGED:
136 			{
137 			      GstState old_state, new_state;
138 
139 			      if (GST_MESSAGE_SRC (message) != GST_OBJECT (part->playbin))
140 				      break;
141 
142 			      gst_message_parse_state_changed (message, &old_state, &new_state, NULL);
143 
144 			      if (old_state == new_state)
145 				      break;
146 
147 			      if (part->play_button)
148 					gtk_widget_set_sensitive (
149 						part->play_button,
150 						new_state <= GST_STATE_PAUSED);
151 			      if (part->pause_button)
152 					gtk_widget_set_sensitive (
153 						part->pause_button,
154 						new_state > GST_STATE_PAUSED);
155 			      if (part->stop_button)
156 					gtk_widget_set_sensitive (
157 						part->stop_button,
158 						new_state >= GST_STATE_PAUSED);
159 			}
160 
161 			break;
162 		default:
163 			break;
164 	}
165 
166 	return TRUE;
167 }
168 
169 static void
170 play_clicked (GtkWidget *button,
171               EMailPartAudioInline *part)
172 {
173 	GstState cur_state;
174 
175 	d (printf ("audio inline formatter: play\n"));
176 
177 	if (!part->filename) {
178 		CamelStream *stream;
179 		CamelDataWrapper *data;
180 		GError *error = NULL;
181 		gint argc = 1;
182 		const gchar *argv[] = { "org_gnome_audio_inline", NULL };
183 
184 		/* FIXME this is ugly, we should stream this directly to gstreamer */
185 		part->filename = e_mktemp ("org-gnome-audio-inline-file-XXXXXX");
186 
187 		d (printf ("audio inline formatter: write to temp file %s\n", po->filename));
188 
189 		stream = camel_stream_fs_new_with_name (
190 			part->filename, O_RDWR | O_CREAT | O_TRUNC, 0600, NULL);
191 		data = camel_medium_get_content (CAMEL_MEDIUM (part->parent.part));
192 		camel_data_wrapper_decode_to_stream_sync (data, stream, NULL, NULL);
193 		camel_stream_flush (stream, NULL, NULL);
194 		g_object_unref (stream);
195 
196 		d (printf ("audio inline formatter: init gst playbin\n"));
197 
198 		if (gst_init_check (&argc, (gchar ***) &argv, &error)) {
199 			gchar *uri;
200 			GstBus *bus;
201 
202 			/* create a disk reader */
203 			part->playbin = gst_element_factory_make ("playbin", "playbin");
204 			if (part->playbin == NULL) {
205 				g_printerr ("Failed to create gst_element_factory playbin; check your installation\n");
206 				return;
207 
208 			}
209 
210 			uri = g_filename_to_uri (part->filename, NULL, NULL);
211 			g_object_set (part->playbin, "uri", uri, NULL);
212 			g_free (uri);
213 			set_audiosink (part->playbin);
214 
215 			bus = gst_element_get_bus (part->playbin);
216 			part->bus_id = gst_bus_add_watch (bus, gst_callback, part);
217 			gst_object_unref (bus);
218 
219 		} else {
220 			g_printerr ("GStreamer failed to initialize: %s",error ? error->message : "");
221 			g_error_free (error);
222 		}
223 	}
224 
225 	gst_element_get_state (part->playbin, &cur_state, NULL, 0);
226 
227 	if (cur_state >= GST_STATE_PAUSED) {
228 		gst_element_set_state (part->playbin, GST_STATE_READY);
229 	}
230 
231 	if (part->playbin) {
232 		/* start playing */
233 		gst_element_set_state (part->playbin, GST_STATE_PLAYING);
234 	}
235 }
236 
237 static GtkWidget *
238 add_button (GtkWidget *box,
239             const gchar *stock_icon,
240             GCallback cb,
241             gpointer data,
242             gboolean sensitive)
243 {
244 	GtkWidget *button;
245 
246 	button = gtk_button_new_from_stock (stock_icon);
247 	gtk_widget_set_sensitive (button, sensitive);
248 	g_signal_connect (button, "clicked", cb, data);
249 
250 	gtk_widget_show (button);
251 	gtk_box_pack_end (GTK_BOX (box), button, TRUE, TRUE, 0);
252 
253 	return button;
254 }
255 
256 static gboolean
257 emfe_audio_inline_format (EMailFormatterExtension *extension,
258                           EMailFormatter *formatter,
259                           EMailFormatterContext *context,
260                           EMailPart *part,
261                           CamelStream *stream,
262                           GCancellable *cancellable)
263 {
264 	gchar *str;
265 
266 	str = g_strdup_printf (
267 		"<object type=\"application/vnd.evolution.widget.audio-inline\" "
268 			"width=\"100%%\" height=\"auto\" data=\"%s\" id=\"%s\"></object>",
269 		part->id, part->id);
270 
271 	camel_stream_write_string (stream, str, cancellable, NULL);
272 
273 	g_free (str);
274 
275 	return TRUE;
276 }
277 
278 static GtkWidget *
279 emfe_audio_inline_get_widget (EMailFormatterExtension *extension,
280                               EMailPartList *context,
281                               EMailPart *part,
282                               GHashTable *params)
283 {
284 	GtkWidget *box;
285 	EMailPartAudioInline *ai_part;
286 
287 	g_return_val_if_fail (E_MAIL_PART_IS (part, EMailPartAudioInline), NULL);
288 	ai_part = (EMailPartAudioInline *) part;
289 
290 	/* it is OK to call UI functions here, since we are called from UI thread */
291 	box = gtk_hbutton_box_new ();
292 	ai_part->play_button = g_object_ref (
293 		add_button (box, GTK_STOCK_MEDIA_PLAY,
294 		G_CALLBACK (play_clicked), part, TRUE));
295 	ai_part->pause_button = g_object_ref (
296 		add_button (box, GTK_STOCK_MEDIA_PAUSE,
297 		G_CALLBACK (pause_clicked), part, FALSE));
298 	ai_part->stop_button = g_object_ref (
299 		add_button (box, GTK_STOCK_MEDIA_STOP,
300 		G_CALLBACK (stop_clicked), part, FALSE));
301 
302 	gtk_widget_show (box);
303 
304 	return box;
305 }
306 
307 static const gchar *
308 emfe_audio_inline_get_display_name (EMailFormatterExtension *extension)
309 {
310 	return _("Audio Player");
311 }
312 
313 static const gchar *
314 emfe_audio_inline_get_description (EMailFormatterExtension *extension)
315 {
316 	return _("Play the attachment in embedded audio player");
317 }
318 
319 static const gchar **
320 emfe_audio_inline_mime_types (EMailExtension *extension)
321 {
322 	return formatter_mime_types;
323 }
324 
325 static void
326 e_mail_formatter_audio_inline_constructed (GObject *object)
327 {
328 	EExtensible *extensible;
329 	EMailExtensionRegistry *reg;
330 
331 	extensible = e_extension_get_extensible (E_EXTENSION (object));
332 	reg = E_MAIL_EXTENSION_REGISTRY (extensible);
333 
334 	e_mail_extension_registry_add_extension (reg, E_MAIL_EXTENSION (object));
335 }
336 
337 static void
338 e_mail_formatter_audio_inline_class_init (EMailFormatterAudioInlineClass *class)
339 {
340 	GObjectClass *object_class;
341 	EExtensionClass *extension_class;
342 
343 	object_class = G_OBJECT_CLASS (class);
344 	object_class->constructed = e_mail_formatter_audio_inline_constructed;
345 
346 	extension_class = E_EXTENSION_CLASS (class);
347 	extension_class->extensible_type = E_TYPE_MAIL_FORMATTER_EXTENSION_REGISTRY;
348 }
349 
350 static void
351 e_mail_formatter_formatter_extension_interface_init (EMailFormatterExtensionInterface *iface)
352 {
353 	iface->format = emfe_audio_inline_format;
354 	iface->get_widget = emfe_audio_inline_get_widget;
355 	iface->get_display_name = emfe_audio_inline_get_display_name;
356 	iface->get_description = emfe_audio_inline_get_description;
357 }
358 
359 static void
360 e_mail_formatter_mail_extension_interface_init (EMailExtensionInterface *iface)
361 {
362 	iface->mime_types = emfe_audio_inline_mime_types;
363 }
364 
365 static void
366 e_mail_formatter_audio_inline_init (EMailFormatterAudioInline *formatter)
367 {
368 
369 }
370 
371 void
372 e_mail_formatter_audio_inline_type_register (GTypeModule *type_module)
373 {
374 	e_mail_formatter_audio_inline_register_type (type_module);
375 }
376 
377 static void
378 e_mail_formatter_audio_inline_class_finalize (EMailFormatterAudioInlineClass *class)
379 {
380 
381 }