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  • Committer: Bazaar Package Importer
  • Author(s): Rodrigo Moya
  • Date: 2011-05-17 10:47:27 UTC
  • mfrom: (0.1.11 experimental) (1.1.45 upstream)
  • Revision ID: james.westby@ubuntu.com-20110517104727-lqel6m8vhfw5jby1
Tags: 1:3.0.1.1-1ubuntu1
* Rebase on Debian, remaining Ubuntu changes:
* debian/control:
  - Build-Depend on hardening-wrapper, dpkg-dev and dh-autoreconf
  - Add dependency on ubuntu-system-service
  - Remove dependency on gnome-icon-theme-symbolic
  - Move dependency on apg, gnome-icon-theme-symbolic and accountsservice to
    be a Recommends: until we get them in main
* debian/rules:
  - Use autoreconf
  - Add binary-post-install rule for gnome-control-center-data
  - Run dh-autoreconf
* debian/gnome-control-center.dirs:
* debian/gnome-control-center.links:
  - Add a link to the control center shell for indicators
* debian/patches/00_disable-nm.patch:
  - Temporary patch to disable building with NetworkManager until we get
    the new one in the archive
* debian/patches/01_git_remove_gettext_calls.patch:
  - Remove calls to AM_GNU_GETTEXT, IT_PROG_INTLTOOL should be enough
* debian/patches/01_git_kill_warning.patch:
  - Kill warning
* debian/patches/50_ubuntu_systemwide_prefs.patch:
  - Ubuntu specific proxy preferences
* debian/patches/51_ubuntu_system_keyboard.patch:
  - Implement the global keyboard spec at https://wiki.ubuntu.com/DefaultKeyboardSettings

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panels/sound/gvc-speaker-test.c
 
1
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
 
2
 *
 
3
 * Copyright (C) 2009 Bastien Nocera
 
4
 *
 
5
 * This program is free software; you can redistribute it and/or modify
 
6
 * it under the terms of the GNU General Public License as published by
 
7
 * the Free Software Foundation; either version 2 of the License, or
 
8
 * (at your option) any later version.
 
9
 *
 
10
 * This program is distributed in the hope that it will be useful,
 
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
13
 * GNU General Public License for more details.
 
14
 *
 
15
 * You should have received a copy of the GNU General Public License
 
16
 * along with this program; if not, write to the Free Software
 
17
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
18
 *
 
19
 */
 
20
 
 
21
#include "config.h"
 
22
 
 
23
#include <stdlib.h>
 
24
#include <stdio.h>
 
25
#include <unistd.h>
 
26
 
 
27
#include <glib.h>
 
28
#include <glib/gi18n-lib.h>
 
29
#include <gtk/gtk.h>
 
30
#include <canberra.h>
 
31
#include <canberra-gtk.h>
 
32
#include <pulse/pulseaudio.h>
 
33
 
 
34
#include "gvc-speaker-test.h"
 
35
#include "gvc-mixer-stream.h"
 
36
#include "gvc-mixer-card.h"
 
37
 
 
38
#define GVC_SPEAKER_TEST_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GVC_TYPE_SPEAKER_TEST, GvcSpeakerTestPrivate))
 
39
 
 
40
struct GvcSpeakerTestPrivate
 
41
{
 
42
        GtkWidget       *channel_controls[PA_CHANNEL_POSITION_MAX];
 
43
        ca_context      *canberra;
 
44
        GvcMixerCard    *card;
 
45
        GvcMixerControl *control;
 
46
};
 
47
 
 
48
enum {
 
49
        COL_NAME,
 
50
        COL_HUMAN_NAME,
 
51
        NUM_COLS
 
52
};
 
53
 
 
54
enum {
 
55
        PROP_0,
 
56
        PROP_CARD,
 
57
        PROP_CONTROL
 
58
};
 
59
 
 
60
static void     gvc_speaker_test_class_init (GvcSpeakerTestClass *klass);
 
61
static void     gvc_speaker_test_init       (GvcSpeakerTest      *speaker_test);
 
62
static void     gvc_speaker_test_finalize   (GObject            *object);
 
63
static void     update_channel_map          (GvcSpeakerTest *speaker_test);
 
64
 
 
65
G_DEFINE_TYPE (GvcSpeakerTest, gvc_speaker_test, GTK_TYPE_TABLE)
 
66
 
 
67
static const int position_table[] = {
 
68
        /* Position, X, Y */
 
69
        PA_CHANNEL_POSITION_FRONT_LEFT, 0, 0,
 
70
        PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, 1, 0,
 
71
        PA_CHANNEL_POSITION_FRONT_CENTER, 2, 0,
 
72
        PA_CHANNEL_POSITION_MONO, 2, 0,
 
73
        PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER, 3, 0,
 
74
        PA_CHANNEL_POSITION_FRONT_RIGHT, 4, 0,
 
75
        PA_CHANNEL_POSITION_SIDE_LEFT, 0, 1,
 
76
        PA_CHANNEL_POSITION_SIDE_RIGHT, 4, 1,
 
77
        PA_CHANNEL_POSITION_REAR_LEFT, 0, 2,
 
78
        PA_CHANNEL_POSITION_REAR_CENTER, 2, 2,
 
79
        PA_CHANNEL_POSITION_REAR_RIGHT, 4, 2,
 
80
        PA_CHANNEL_POSITION_LFE, 3, 2
 
81
};
 
82
 
 
83
static void
 
84
gvc_speaker_test_set_property (GObject       *object,
 
85
                               guint          prop_id,
 
86
                               const GValue  *value,
 
87
                               GParamSpec    *pspec)
 
88
{
 
89
        GvcSpeakerTest *self = GVC_SPEAKER_TEST (object);
 
90
 
 
91
        switch (prop_id) {
 
92
        case PROP_CARD:
 
93
                self->priv->card = g_value_dup_object (value);
 
94
                if (self->priv->control != NULL)
 
95
                        update_channel_map (self);
 
96
                break;
 
97
        case PROP_CONTROL:
 
98
                self->priv->control = g_value_dup_object (value);
 
99
                if (self->priv->card != NULL)
 
100
                        update_channel_map (self);
 
101
                break;
 
102
        default:
 
103
                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 
104
                break;
 
105
        }
 
106
}
 
107
 
 
108
static void
 
109
gvc_speaker_test_get_property (GObject     *object,
 
110
                               guint        prop_id,
 
111
                               GValue      *value,
 
112
                               GParamSpec  *pspec)
 
113
{
 
114
        GvcSpeakerTest *self = GVC_SPEAKER_TEST (object);
 
115
 
 
116
        switch (prop_id) {
 
117
        case PROP_CARD:
 
118
                g_value_set_object (value, self->priv->card);
 
119
                break;
 
120
        case PROP_CONTROL:
 
121
                g_value_set_object (value, self->priv->control);
 
122
                break;
 
123
        default:
 
124
                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 
125
                break;
 
126
        }
 
127
}
 
128
 
 
129
static void
 
130
gvc_speaker_test_class_init (GvcSpeakerTestClass *klass)
 
131
{
 
132
        GObjectClass   *object_class = G_OBJECT_CLASS (klass);
 
133
 
 
134
        object_class->finalize = gvc_speaker_test_finalize;
 
135
        object_class->set_property = gvc_speaker_test_set_property;
 
136
        object_class->get_property = gvc_speaker_test_get_property;
 
137
 
 
138
        g_object_class_install_property (object_class,
 
139
                                         PROP_CARD,
 
140
                                         g_param_spec_object ("card",
 
141
                                                              "card",
 
142
                                                              "The card",
 
143
                                                              GVC_TYPE_MIXER_CARD,
 
144
                                                              G_PARAM_READWRITE|G_PARAM_CONSTRUCT));
 
145
        g_object_class_install_property (object_class,
 
146
                                         PROP_CONTROL,
 
147
                                         g_param_spec_object ("control",
 
148
                                                              "control",
 
149
                                                              "The mixer controller",
 
150
                                                              GVC_TYPE_MIXER_CONTROL,
 
151
                                                              G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
 
152
        g_type_class_add_private (klass, sizeof (GvcSpeakerTestPrivate));
 
153
}
 
154
 
 
155
static const char *
 
156
sound_name (pa_channel_position_t position)
 
157
{
 
158
        switch (position) {
 
159
        case PA_CHANNEL_POSITION_FRONT_LEFT:
 
160
                return "audio-channel-front-left";
 
161
        case PA_CHANNEL_POSITION_FRONT_RIGHT:
 
162
                return "audio-channel-front-right";
 
163
        case PA_CHANNEL_POSITION_FRONT_CENTER:
 
164
                return "audio-channel-front-center";
 
165
        case PA_CHANNEL_POSITION_REAR_LEFT:
 
166
                return "audio-channel-rear-left";
 
167
        case PA_CHANNEL_POSITION_REAR_RIGHT:
 
168
                return "audio-channel-rear-right";
 
169
        case PA_CHANNEL_POSITION_REAR_CENTER:
 
170
                return "audio-channel-rear-center";
 
171
        case PA_CHANNEL_POSITION_LFE:
 
172
                return "audio-channel-lfe";
 
173
        case PA_CHANNEL_POSITION_SIDE_LEFT:
 
174
                return "audio-channel-side-left";
 
175
        case PA_CHANNEL_POSITION_SIDE_RIGHT:
 
176
                return "audio-channel-side-right";
 
177
        default:
 
178
                return NULL;
 
179
        }
 
180
}
 
181
 
 
182
static const char *
 
183
icon_name (pa_channel_position_t position, gboolean playing)
 
184
{
 
185
        switch (position) {
 
186
        case PA_CHANNEL_POSITION_FRONT_LEFT:
 
187
                return playing ? "audio-speaker-left-testing" : "audio-speaker-left";
 
188
        case PA_CHANNEL_POSITION_FRONT_RIGHT:
 
189
                return playing ? "audio-speaker-right-testing" : "audio-speaker-right";
 
190
        case PA_CHANNEL_POSITION_FRONT_CENTER:
 
191
                return playing ? "audio-speaker-center-testing" : "audio-speaker-center";
 
192
        case PA_CHANNEL_POSITION_REAR_LEFT:
 
193
                return playing ? "audio-speaker-left-back-testing" : "audio-speaker-left-back";
 
194
        case PA_CHANNEL_POSITION_REAR_RIGHT:
 
195
                return playing ? "audio-speaker-right-back-testing" : "audio-speaker-right-back";
 
196
        case PA_CHANNEL_POSITION_REAR_CENTER:
 
197
                return playing ? "audio-speaker-center-back-testing" : "audio-speaker-center-back";
 
198
        case PA_CHANNEL_POSITION_LFE:
 
199
                return playing ? "audio-subwoofer-testing" : "audio-subwoofer";
 
200
        case PA_CHANNEL_POSITION_SIDE_LEFT:
 
201
                return playing ? "audio-speaker-left-side-testing" : "audio-speaker-left-side";
 
202
        case PA_CHANNEL_POSITION_SIDE_RIGHT:
 
203
                return playing ? "audio-speaker-right-side-testing" : "audio-speaker-right-side";
 
204
        default:
 
205
                return NULL;
 
206
        }
 
207
}
 
208
 
 
209
static void
 
210
update_button (GtkWidget *control)
 
211
{
 
212
        GtkWidget *button;
 
213
        GtkWidget *image;
 
214
        pa_channel_position_t position;
 
215
        gboolean playing;
 
216
 
 
217
        button = g_object_get_data (G_OBJECT (control), "button");
 
218
        image = g_object_get_data (G_OBJECT (control), "image");
 
219
        position = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (control), "position"));
 
220
        playing = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (control), "playing"));
 
221
        gtk_button_set_label (GTK_BUTTON (button), playing ? _("Stop") : _("Test"));
 
222
        gtk_image_set_from_icon_name (GTK_IMAGE (image), icon_name (position, playing), GTK_ICON_SIZE_DIALOG);
 
223
}
 
224
 
 
225
static const char *
 
226
pretty_position (pa_channel_position_t position)
 
227
{
 
228
        if (position == PA_CHANNEL_POSITION_LFE)
 
229
                return N_("Subwoofer");
 
230
 
 
231
        return pa_channel_position_to_pretty_string (position);
 
232
}
 
233
 
 
234
static gboolean
 
235
idle_cb (GtkWidget *control)
 
236
{
 
237
        if (control == NULL)
 
238
                return FALSE;
 
239
 
 
240
        /* This is called in the background thread, hence
 
241
         * forward to main thread via idle callback */
 
242
        g_object_set_data (G_OBJECT (control), "playing", GINT_TO_POINTER(FALSE));
 
243
        update_button (control);
 
244
 
 
245
        return FALSE;
 
246
}
 
247
 
 
248
static void
 
249
finish_cb (ca_context *c, uint32_t id, int error_code, void *userdata)
 
250
{
 
251
        GtkWidget *control = (GtkWidget *) userdata;
 
252
 
 
253
        if (error_code == CA_ERROR_DESTROYED || control == NULL)
 
254
                return;
 
255
        g_idle_add ((GSourceFunc) idle_cb, control);
 
256
}
 
257
 
 
258
static void
 
259
on_test_button_clicked (GtkButton *button,
 
260
                        GtkWidget *control)
 
261
{
 
262
        gboolean playing;
 
263
        ca_context *canberra;
 
264
 
 
265
        canberra = g_object_get_data (G_OBJECT (control), "canberra");
 
266
 
 
267
        ca_context_cancel (canberra, 1);
 
268
 
 
269
        playing = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (control), "playing"));
 
270
 
 
271
        if (playing) {
 
272
                g_object_set_data (G_OBJECT (control), "playing", GINT_TO_POINTER(FALSE));
 
273
        } else {
 
274
                pa_channel_position_t position;
 
275
                const char *name;
 
276
                ca_proplist *proplist;
 
277
 
 
278
                position = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (control), "position"));
 
279
 
 
280
                ca_proplist_create (&proplist);
 
281
                ca_proplist_sets (proplist, CA_PROP_MEDIA_ROLE, "test");
 
282
                ca_proplist_sets (proplist, CA_PROP_MEDIA_NAME, pretty_position (position));
 
283
                ca_proplist_sets (proplist, CA_PROP_CANBERRA_FORCE_CHANNEL,
 
284
                                  pa_channel_position_to_string (position));
 
285
                ca_proplist_sets (proplist, CA_PROP_CANBERRA_ENABLE, "1");
 
286
 
 
287
                name = sound_name (position);
 
288
                if (name != NULL) {
 
289
                        ca_proplist_sets (proplist, CA_PROP_EVENT_ID, name);
 
290
                        playing = ca_context_play_full (canberra, 1, proplist, finish_cb, control) >= 0;
 
291
                }
 
292
 
 
293
                if (!playing) {
 
294
                        ca_proplist_sets (proplist, CA_PROP_EVENT_ID, "audio-test-signal");
 
295
                        playing = ca_context_play_full (canberra, 1, proplist, finish_cb, control) >= 0;
 
296
                }
 
297
 
 
298
                if (!playing) {
 
299
                        ca_proplist_sets(proplist, CA_PROP_EVENT_ID, "bell-window-system");
 
300
                        playing = ca_context_play_full (canberra, 1, proplist, finish_cb, control) >= 0;
 
301
                }
 
302
                g_object_set_data (G_OBJECT (control), "playing", GINT_TO_POINTER(playing));
 
303
        }
 
304
 
 
305
        update_button (control);
 
306
}
 
307
 
 
308
static GtkWidget *
 
309
channel_control_new (ca_context *canberra, pa_channel_position_t position)
 
310
{
 
311
        GtkWidget *control;
 
312
        GtkWidget *box;
 
313
        GtkWidget *label;
 
314
        GtkWidget *image;
 
315
        GtkWidget *test_button;
 
316
        const char *name;
 
317
 
 
318
        control = gtk_vbox_new (FALSE, 6);
 
319
        g_object_set_data (G_OBJECT (control), "playing", GINT_TO_POINTER(FALSE));
 
320
        g_object_set_data (G_OBJECT (control), "position", GINT_TO_POINTER(position));
 
321
        g_object_set_data (G_OBJECT (control), "canberra", canberra);
 
322
 
 
323
        name = icon_name (position, FALSE);
 
324
        if (name == NULL)
 
325
                name = "audio-volume-medium";
 
326
        image = gtk_image_new_from_icon_name (name, GTK_ICON_SIZE_DIALOG);
 
327
        g_object_set_data (G_OBJECT (control), "image", image);
 
328
        gtk_box_pack_start (GTK_BOX (control), image, FALSE, FALSE, 0);
 
329
 
 
330
        label = gtk_label_new (pretty_position (position));
 
331
        gtk_box_pack_start (GTK_BOX (control), label, FALSE, FALSE, 0);
 
332
 
 
333
        test_button = gtk_button_new_with_label (_("Test"));
 
334
        g_signal_connect (G_OBJECT (test_button), "clicked",
 
335
                          G_CALLBACK (on_test_button_clicked), control);
 
336
        g_object_set_data (G_OBJECT (control), "button", test_button);
 
337
 
 
338
        box = gtk_hbox_new (FALSE, 0);
 
339
        gtk_box_pack_start (GTK_BOX (box), test_button, TRUE, FALSE, 0);
 
340
        gtk_box_pack_start (GTK_BOX (control), box, FALSE, FALSE, 0);
 
341
 
 
342
        gtk_widget_show_all (control);
 
343
 
 
344
        return control;
 
345
}
 
346
 
 
347
static void
 
348
create_channel_controls (GvcSpeakerTest *speaker_test)
 
349
{
 
350
        guint i;
 
351
 
 
352
        for (i = 0; i < G_N_ELEMENTS (position_table); i += 3) {
 
353
                speaker_test->priv->channel_controls[position_table[i]] = channel_control_new (speaker_test->priv->canberra, (pa_channel_position_t) position_table[i]);
 
354
                gtk_table_attach (GTK_TABLE (speaker_test),
 
355
                                  speaker_test->priv->channel_controls[position_table[i]],
 
356
                                  position_table[i+1],
 
357
                                  position_table[i+1]+1,
 
358
                                  position_table[i+2],
 
359
                                  position_table[i+2]+1,
 
360
                                  GTK_EXPAND, GTK_EXPAND, 0, 0);
 
361
        }
 
362
}
 
363
 
 
364
static const GvcChannelMap *
 
365
get_channel_map_for_card (GvcMixerControl *control,
 
366
                          GvcMixerCard    *card,
 
367
                          char           **output_name)
 
368
{
 
369
        int card_index;
 
370
        GSList *sinks, *l;
 
371
        GvcMixerStream *stream;
 
372
        const GvcChannelMap *map;
 
373
 
 
374
        /* This gets the channel map for the only
 
375
         * output for the card */
 
376
 
 
377
        card_index = gvc_mixer_card_get_index (card);
 
378
        if (card_index == PA_INVALID_INDEX)
 
379
                return NULL;
 
380
        sinks = gvc_mixer_control_get_sinks (control);
 
381
        stream = NULL;
 
382
        for (l = sinks; l != NULL; l = l->next) {
 
383
                GvcMixerStream *s = l->data;
 
384
                if (gvc_mixer_stream_get_card_index (s) == card_index) {
 
385
                        stream = g_object_ref (s);
 
386
                        break;
 
387
                }
 
388
        }
 
389
        g_slist_free (sinks);
 
390
 
 
391
        g_assert (stream);
 
392
 
 
393
        g_debug ("Found stream '%s' for card '%s'",
 
394
                 gvc_mixer_stream_get_name (stream),
 
395
                 gvc_mixer_card_get_name (card));
 
396
 
 
397
        *output_name = g_strdup (gvc_mixer_stream_get_name (stream));
 
398
        map = gvc_mixer_stream_get_channel_map (stream);
 
399
 
 
400
        g_debug ("Got channel map '%s' for port '%s'",
 
401
                 gvc_channel_map_get_mapping (map), *output_name);
 
402
 
 
403
        return map;
 
404
}
 
405
 
 
406
static void
 
407
update_channel_map (GvcSpeakerTest *speaker_test)
 
408
{
 
409
        guint i;
 
410
        const GvcChannelMap *map;
 
411
        char *output_name;
 
412
 
 
413
        g_return_if_fail (speaker_test->priv->control != NULL);
 
414
        g_return_if_fail (speaker_test->priv->card != NULL);
 
415
 
 
416
        g_debug ("XXX update_channel_map called XXX");
 
417
 
 
418
        map = get_channel_map_for_card (speaker_test->priv->control,
 
419
                                        speaker_test->priv->card,
 
420
                                        &output_name);
 
421
 
 
422
        g_return_if_fail (map != NULL);
 
423
 
 
424
        ca_context_change_device (speaker_test->priv->canberra, output_name);
 
425
        g_free (output_name);
 
426
 
 
427
        for (i = 0; i < G_N_ELEMENTS (position_table); i += 3) {
 
428
                gtk_widget_set_visible (speaker_test->priv->channel_controls[position_table[i]],
 
429
                                        gvc_channel_map_has_position(map, position_table[i]));
 
430
        }
 
431
}
 
432
 
 
433
static void
 
434
gvc_speaker_test_init (GvcSpeakerTest *speaker_test)
 
435
{
 
436
        GtkWidget *face;
 
437
 
 
438
        speaker_test->priv = GVC_SPEAKER_TEST_GET_PRIVATE (speaker_test);
 
439
 
 
440
        ca_context_create (&speaker_test->priv->canberra);
 
441
        ca_context_set_driver (speaker_test->priv->canberra, "pulse");
 
442
        ca_context_change_props (speaker_test->priv->canberra,
 
443
                                 CA_PROP_APPLICATION_ID, "org.gnome.VolumeControl",
 
444
                                 NULL);
 
445
 
 
446
        gtk_table_resize (GTK_TABLE (speaker_test), 3, 5);
 
447
        gtk_container_set_border_width (GTK_CONTAINER (speaker_test), 12);
 
448
        gtk_table_set_homogeneous (GTK_TABLE (speaker_test), TRUE);
 
449
        gtk_table_set_row_spacings (GTK_TABLE (speaker_test), 12);
 
450
        gtk_table_set_col_spacings (GTK_TABLE (speaker_test), 12);
 
451
 
 
452
        create_channel_controls (speaker_test);
 
453
 
 
454
        face = gtk_image_new_from_icon_name ("face-smile", GTK_ICON_SIZE_DIALOG);
 
455
        gtk_table_attach (GTK_TABLE (speaker_test), face,
 
456
                          2, 3, 1, 2, GTK_EXPAND, GTK_EXPAND, 0, 0);
 
457
        gtk_widget_show (face);
 
458
}
 
459
 
 
460
static void
 
461
gvc_speaker_test_finalize (GObject *object)
 
462
{
 
463
        GvcSpeakerTest *speaker_test;
 
464
 
 
465
        g_return_if_fail (object != NULL);
 
466
        g_return_if_fail (GVC_IS_SPEAKER_TEST (object));
 
467
 
 
468
        speaker_test = GVC_SPEAKER_TEST (object);
 
469
 
 
470
        g_return_if_fail (speaker_test->priv != NULL);
 
471
 
 
472
        g_object_unref (speaker_test->priv->card);
 
473
        speaker_test->priv->card = NULL;
 
474
 
 
475
        g_object_unref (speaker_test->priv->control);
 
476
        speaker_test->priv->control = NULL;
 
477
 
 
478
        ca_context_destroy (speaker_test->priv->canberra);
 
479
        speaker_test->priv->canberra = NULL;
 
480
 
 
481
        G_OBJECT_CLASS (gvc_speaker_test_parent_class)->finalize (object);
 
482
}
 
483
 
 
484
GtkWidget *
 
485
gvc_speaker_test_new (GvcMixerControl *control,
 
486
                      GvcMixerCard *card)
 
487
{
 
488
        GObject *speaker_test;
 
489
 
 
490
        g_return_val_if_fail (card != NULL, NULL);
 
491
        g_return_val_if_fail (control != NULL, NULL);
 
492
 
 
493
        speaker_test = g_object_new (GVC_TYPE_SPEAKER_TEST,
 
494
                                  "card", card,
 
495
                                  "control", control,
 
496
                                  NULL);
 
497
 
 
498
        return GTK_WIDGET (speaker_test);
 
499
}
 
500