summaryrefslogtreecommitdiff
path: root/gst-mixer/src/volume.c
blob: 3df721fcf40ffde37758944bec2d9a60ee45e38d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
/* MATE Volume Control
 * Copyright (C) 2003-2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
 *
 * volume.c: representation of a track's volume channels
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#define _ISOC99_SOURCE

#include <math.h>
#include <glib/gi18n.h>
#include <gdk/gdkx.h>
#include <gtk/gtk.h>

#include "volume.h"
#include "button.h"

G_DEFINE_TYPE (MateVolumeControlVolume, mate_volume_control_volume, GTK_TYPE_FIXED)


static void	mate_volume_control_volume_class_init	(MateVolumeControlVolumeClass *klass);
static void	mate_volume_control_volume_init	(MateVolumeControlVolume *el);
static void	mate_volume_control_volume_dispose	(GObject   *object);

static void	mate_volume_control_volume_size_req	(GtkWidget *widget,
							 GtkRequisition *req);
static void	mate_volume_control_volume_size_alloc	(GtkWidget *widget,
							 GtkAllocation *alloc);
static gboolean	mate_volume_control_volume_expose	(GtkWidget *widget,
							 GdkEventExpose *expose);

static void	cb_volume_changed			(GtkAdjustment *adj,
							 gpointer   data);
static void	cb_lock_toggled				(GtkToggleButton *button,
							 gpointer   data);

static gboolean	cb_check				(gpointer   data);


static void
mate_volume_control_volume_class_init (MateVolumeControlVolumeClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);

  gobject_class->dispose = mate_volume_control_volume_dispose;
  gtkwidget_class->size_allocate = mate_volume_control_volume_size_alloc;
  gtkwidget_class->size_request = mate_volume_control_volume_size_req;
  gtkwidget_class->expose_event = mate_volume_control_volume_expose;
}

static void
mate_volume_control_volume_init (MateVolumeControlVolume *vol)
{
  #if GTK_CHECK_VERSION(2,18,0)
  gtk_widget_set_has_window (GTK_WIDGET (vol), TRUE);
  #else
  gtk_fixed_set_has_window (GTK_FIXED (vol), TRUE);
  #endif

  vol->mixer = NULL;
  vol->track = NULL;
  vol->padding = 6;
  vol->scales = NULL;
  vol->button = NULL;
  vol->locked = FALSE;
  vol->id = 0;
}

static GtkWidget *
get_scale (MateVolumeControlVolume *vol,
	   gint num_chan,
	   gint volume)
{
  GtkWidget *slider;
  GtkObject *adj;
  AtkObject *accessible;
  gchar *accessible_name;

  adj = gtk_adjustment_new (volume,
		vol->track->min_volume, vol->track->max_volume,
		(vol->track->max_volume - vol->track->min_volume) / 100.0,
		(vol->track->max_volume - vol->track->min_volume) / 10.0, 0.0);
  g_signal_connect (adj, "value_changed",
		    G_CALLBACK (cb_volume_changed), vol);
  slider = gtk_vscale_new (GTK_ADJUSTMENT (adj));
  gtk_scale_set_draw_value (GTK_SCALE (slider), FALSE);
  gtk_range_set_inverted (GTK_RANGE (slider), TRUE);

  /* a11y */
  accessible = gtk_widget_get_accessible (slider);
  if (GTK_IS_ACCESSIBLE (accessible)) {
    if (vol->track->num_channels == 1) {
      accessible_name = g_strdup_printf (_("Track %s"),
					 vol->track->label);
    } else {
      gchar *accessible_desc = g_strdup_printf (_("Channel %d of track %s"),
						num_chan + 1,
						vol->track->label);
      accessible_name = g_strdup_printf (_("Track %s, channel %d"),
					 vol->track->label, num_chan + 1);
      atk_object_set_description (accessible, accessible_desc); 
      g_free (accessible_desc);
    }
    atk_object_set_name (accessible, accessible_name);
    g_free (accessible_name);
  }

  return slider;
}

static void
get_button (MateVolumeControlVolume *vol,
	    gint *volumes)
{
  AtkObject *accessible;
  gchar *accessible_name, *msg;
  gint n;

  msg = g_strdup_printf (_("Lock channels for %s together"), vol->track->label);
  vol->button = mate_volume_control_button_new ("chain.png",
						 "chain-broken.png",
						 msg);
  g_free (msg);
  g_signal_connect (vol->button, "clicked",
		    G_CALLBACK (cb_lock_toggled), vol);
  for (n = 1; n < vol->track->num_channels; n++) {
    /* default, unlocked */
    if (volumes[n] != volumes[0])
      break;
  }
  mate_volume_control_button_set_active (MATE_VOLUME_CONTROL_BUTTON (vol->button),
					  n == vol->track->num_channels);

  /* a11y */
  accessible = gtk_widget_get_accessible (vol->button);
  if (GTK_IS_ACCESSIBLE (accessible)) {
    accessible_name = g_strdup_printf (_("Track %s: lock channels together"),
				       vol->track->label);
    atk_object_set_name (accessible, accessible_name);
    g_free (accessible_name);
  }
}

GtkWidget *
mate_volume_control_volume_new (GstMixer *mixer,
				 GstMixerTrack *track,
				 gint      padding)
{
  MateVolumeControlVolume *vol;
  gint *volumes, n;
  gchar *msg, *chan;
  gboolean need_timeout = TRUE;

  need_timeout = ((gst_mixer_get_mixer_flags (GST_MIXER (mixer)) &
		   GST_MIXER_FLAG_AUTO_NOTIFICATIONS) == 0);

  /* volume */
  vol = g_object_new (MATE_VOLUME_CONTROL_TYPE_VOLUME, NULL);
  gst_object_ref (GST_OBJECT (mixer));
  vol->mixer = mixer;
  vol->track = g_object_ref (G_OBJECT (track));
  if (padding >= 0)
    vol->padding = padding;

  /* sliders */
  volumes = g_new0 (gint, track->num_channels);
  gst_mixer_get_volume (mixer, track, volumes);
  for (n = 0; n < track->num_channels; n++) {
    GtkWidget *slider;

    /* we will reposition the widget once we're drawing up */
    slider = get_scale (vol, n, volumes[n]);
    gtk_fixed_put (GTK_FIXED (vol), slider, 0, 0);
    gtk_widget_show (slider);
    vol->scales = g_list_append (vol->scales, slider);

    /* somewhat dirty hack that will suffice for now. 1 chan
     * means mono, two means stereo (left/right) and > 2 means
     * alsa, where channel order is front, rear, center, lfe,
     * side. */
    if (vol->track->num_channels == 1) {
        chan = _("mono");
    } else if (vol->track->num_channels == 2) {
        chan = (n == 0) ? _("left") : _("right");
    } else {
        switch (n) {
            case 0:  chan = _("front left"); break;
            case 1:  chan = _("front right"); break;
            case 2:  chan = _("rear left"); break;
            case 3:  chan = _("rear right"); break;
            case 4:  chan = _("front center"); break;
            /* Translators: This is the name of a surround sound channel. It
             * stands for "Low-Frequency Effects". If you're not sure that
             * this has an established and different translation in your
             * language, leave it unchanged. */
            case 5:  chan = _("LFE"); break;
            case 6:  chan = _("side left"); break;
            case 7:  chan = _("side right"); break;
            default: chan = _("unknown"); break;
        }
    }

    /* Here, we can actually tell people that this
     * is a slider that will change channel X. */
    msg = g_strdup_printf (_("Volume of %s channel on %s"),
            chan, vol->track->label);
    gtk_widget_set_tooltip_text (slider, msg);
    g_free (msg);
  }

  /* chainbutton */
  get_button (vol, volumes);
  if (track->num_channels > 1) {
    gtk_fixed_put (GTK_FIXED (vol), vol->button, 0, 0);
    gtk_widget_show (vol->button);
  }

  g_free (volumes);

  /* GStreamer signals */
  if (need_timeout)
    vol->id = g_timeout_add (100, cb_check, vol);

  return GTK_WIDGET (vol);
}

static void
mate_volume_control_volume_dispose (GObject *object)
{
  MateVolumeControlVolume *vol = MATE_VOLUME_CONTROL_VOLUME (object);

  if (vol->id != 0) {
    g_source_remove (vol->id);
    vol->id = 0;
  }

  if (vol->track) {
    g_object_unref (G_OBJECT (vol->track));
    vol->track = NULL;
  }

  if (vol->mixer) {
    gst_object_unref (GST_OBJECT (vol->mixer));
    vol->mixer = NULL;
  }

  if (vol->scales) {
    g_list_free (vol->scales);
    vol->scales = NULL;
  }

  G_OBJECT_CLASS (mate_volume_control_volume_parent_class)->dispose (object);
}

/*
 * Gtk/GDK virtual functions for size negotiation.
 */

static void
mate_volume_control_volume_size_req (GtkWidget *widget,
				      GtkRequisition *req)
{
  MateVolumeControlVolume *vol = MATE_VOLUME_CONTROL_VOLUME (widget);
  GtkRequisition but_req, scale_req;

  /* request size of kids */
  GTK_WIDGET_GET_CLASS (vol->button)->size_request (vol->button, &but_req);
  GTK_WIDGET_GET_CLASS (vol->scales->data)->size_request (vol->scales->data,
							  &scale_req);
  if (scale_req.height < 100)
    scale_req.height = 100;

  /* calculate our own size from that */
  req->width = scale_req.width * vol->track->num_channels +
      vol->padding * (vol->track->num_channels - 1);
  req->height = scale_req.height + but_req.height /*+ vol->padding*/;
}

static void
mate_volume_control_volume_size_alloc (GtkWidget *widget,
					GtkAllocation *alloc)
{
  MateVolumeControlVolume *vol = MATE_VOLUME_CONTROL_VOLUME (widget);
  GtkRequisition but_req, scale_req;
  GtkAllocation but_all, scale_all;
  gint x_offset, but_deco_width, n = 0;
  GList *scales;
  GtkAllocation allocation;

  /* loop? */
  gtk_widget_get_allocation (widget, &allocation);
  if (alloc->x == allocation.x &&
      alloc->y == allocation.y &&
      alloc->width == allocation.width &&
      alloc->height == allocation.height)
    return;

  /* request size of kids */
  GTK_WIDGET_GET_CLASS (vol->button)->size_request (vol->button, &but_req);
  GTK_WIDGET_GET_CLASS (vol->scales->data)->size_request (vol->scales->data,
							  &scale_req);

  /* calculate */
  x_offset = (alloc->width - ((vol->track->num_channels * scale_req.width) +
      (vol->track->num_channels - 1) * vol->padding)) / 2;
  scale_all.width = scale_req.width;
  scale_all.height = alloc->height - but_req.height;
  scale_all.y = 0;
  but_deco_width = alloc->width - (2 * x_offset);
  but_all.width = but_req.width;
  but_all.height = but_req.height;
  but_all.x = x_offset + (but_deco_width - but_req.width) / 2;
  but_all.y = alloc->height - but_req.height;

  /* tell sliders */
  for (scales = vol->scales; scales != NULL; scales = scales->next, n++) {
    scale_all.x = x_offset + n * (scale_req.width + vol->padding);
    gtk_fixed_move (GTK_FIXED (vol), scales->data, scale_all.x, scale_all.y);
    gtk_widget_set_size_request (scales->data, scale_all.width, scale_all.height);
  }

  /* tell button */
  if (vol->track->num_channels > 1) {
    gtk_fixed_move (GTK_FIXED (vol), vol->button, but_all.x, but_all.y);
    gtk_widget_set_size_request (vol->button, but_all.width, but_all.height);
  }

  /* parent will resize window */
  GTK_WIDGET_CLASS (mate_volume_control_volume_parent_class)->size_allocate (widget, alloc);
}

static gboolean
mate_volume_control_volume_expose (GtkWidget *widget,
				    GdkEventExpose *expose)
{
  GtkAllocation allocation;
  MateVolumeControlVolume *vol = MATE_VOLUME_CONTROL_VOLUME (widget);

  /* clear background */
  gtk_widget_get_allocation (widget, &allocation);
  gdk_window_clear_area (gtk_widget_get_window (widget), 0, 0,
			 allocation.width,
			 allocation.height);

  if (vol->track->num_channels > 1) {
    gint x_offset, y_offset, height, width;
    GtkRequisition scale_req, but_req;
    GdkPoint points[3];
    GtkStyle *style;
    GtkStateType state;

    /* request size of kids */
    GTK_WIDGET_GET_CLASS (vol->button)->size_request (vol->button, &but_req);
    GTK_WIDGET_GET_CLASS (vol->scales->data)->size_request (vol->scales->data,
							    &scale_req);

    /* calculate */
    gtk_widget_get_allocation (widget, &allocation);
    x_offset = (allocation.width -
        ((vol->track->num_channels * scale_req.width) +
        (vol->track->num_channels - 1) * vol->padding)) / 2;
    y_offset = allocation.height - but_req.height;
    width = allocation.width - (2 * x_offset + but_req.width);
    height = but_req.height / 2;
    points[0].y = y_offset + 3;
    points[1].y = points[2].y = points[0].y + height - 3;

    /* draw chainbutton decorations */
    style = gtk_widget_get_style (widget);
    state = gtk_widget_get_state (widget);

    points[0].x = points[1].x = x_offset + 3;
    points[2].x = points[0].x + width - 6;
    gtk_paint_polygon (style, gtk_widget_get_window (widget),
		       state,
		       GTK_SHADOW_ETCHED_IN,
		       &expose->area, widget, "hseparator",
		       points, 3, FALSE);

    points[0].x = points[1].x = allocation.width - x_offset - 3;
    points[2].x = points[0].x - width + 6;
    gtk_paint_polygon (style, gtk_widget_get_window (widget),
		       state,
		       GTK_SHADOW_ETCHED_IN,
		       &expose->area, widget, "hseparator",
		       points, 3, FALSE);
  }

  /* take care of redrawing the kids */
  return GTK_WIDGET_CLASS (mate_volume_control_volume_parent_class)->expose_event (widget, expose);
}

/*
 * Signals handlers.
 */

static void
cb_volume_changed (GtkAdjustment *_adj,
		   gpointer       data)
{
  MateVolumeControlVolume *vol = data;
  gint *volumes, i = 0;
  GList *scales;

  if (vol->locked)
    return;
  vol->locked = TRUE;
  volumes = g_new (gint, vol->track->num_channels);

  for (scales = vol->scales; scales != NULL; scales = scales->next) {
    GtkAdjustment *adj = gtk_range_get_adjustment (scales->data);

    if (mate_volume_control_button_get_active (
            MATE_VOLUME_CONTROL_BUTTON (vol->button))) {
      gtk_adjustment_set_value (adj, gtk_adjustment_get_value (_adj));
      volumes[i++] = rint (gtk_adjustment_get_value (_adj));
    } else {
      volumes[i++] = rint (gtk_adjustment_get_value (adj));
    }
  }

  gst_mixer_set_volume (vol->mixer, vol->track, volumes);

  g_free (volumes);
  vol->locked = FALSE;
}

static void
cb_lock_toggled (GtkToggleButton *button,
		 gpointer         data)
{
  MateVolumeControlVolume *vol = data;

  if (mate_volume_control_button_get_active (
          MATE_VOLUME_CONTROL_BUTTON (vol->button))) {
    /* get the mean value, and set it on the first adjustment.
     * the cb_volume_changed () callback will take care of the
     * rest. */
    gint volume = 0, num = 0;
    GList *scales;

    for (scales = vol->scales ; scales != NULL; scales = scales->next) {
      GtkAdjustment *adj = gtk_range_get_adjustment (scales->data);

      num++;
      volume += gtk_adjustment_get_value (adj);
    }

    /* safety check */
    if (vol->scales != NULL) {
      gtk_adjustment_set_value (gtk_range_get_adjustment (vol->scales->data),
				volume / num);
    }
  }
}

/*
 * See if our volume is zero.
 */

void
mate_volume_control_volume_ask (MateVolumeControlVolume * vol,
    gboolean *real_zero, gboolean *slider_zero)
{
  GList *scales;
  gint *volumes, n, tot = 0;

  volumes = g_new (gint, vol->track->num_channels);
  gst_mixer_get_volume (vol->mixer, vol->track, volumes);
  for (n = 0; n < vol->track->num_channels; n++)
    tot += volumes[n];
  g_free (volumes);
  *real_zero = (tot == 0);

  *slider_zero = TRUE;
  for (n = 0, scales = vol->scales;
       scales != NULL; scales = scales->next, n++) {
    GtkAdjustment *adj = gtk_range_get_adjustment (scales->data);
                                                                                
    if (rint (gtk_adjustment_get_value (adj)) != 0) {
      *slider_zero = FALSE;
      break;
    }
  }
}


void
mate_volume_control_volume_update (MateVolumeControlVolume *vol)
{
  gint *volumes, n;
  GList *scales;

  /* don't do callbacks */
  if (vol->locked)
    return;

  vol->locked = TRUE;

  volumes = g_new (gint, vol->track->num_channels);
  gst_mixer_get_volume (vol->mixer, vol->track, volumes);

  /* did we change? */
  for (n = 0, scales = vol->scales;
       scales != NULL; scales = scales->next, n++) {
    GtkAdjustment *adj = gtk_range_get_adjustment (scales->data);

    if ((gint) gtk_adjustment_get_value (adj) != volumes[n]) {
      gtk_range_set_value (scales->data, volumes[n]);
    }

    /* should we release lock? */
    if (volumes[n] != volumes[0]) {
      mate_volume_control_button_set_active (
	MATE_VOLUME_CONTROL_BUTTON (vol->button), FALSE);
    }
  }

  g_free (volumes);
  vol->locked = FALSE;
}

/*
 * Timeout to check for volume changes.
 */

static gboolean
cb_check (gpointer data)
{
  mate_volume_control_volume_update (data);

  return TRUE;
}