2 * This file is part of DisOrder.
3 * Copyright (C) 2006, 2007 Richard Kettlewell
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.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
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
20 /** @file disobedience/control.c
21 * @brief Volume control and buttons
24 #include "disobedience.h"
27 /* Forward declarations ---------------------------------------------------- */
39 static void update_pause(const struct icon *);
40 static void update_play(const struct icon *);
41 static void update_scratch(const struct icon *);
42 static void update_random_enable(const struct icon *);
43 static void update_random_disable(const struct icon *);
44 static void update_enable(const struct icon *);
45 static void update_disable(const struct icon *);
46 static void update_rtp(const struct icon *);
47 static void update_nortp(const struct icon *);
48 static void clicked_icon(GtkButton *, gpointer);
49 static void clicked_menu(GtkMenuItem *, gpointer userdata);
50 static void toggled_menu(GtkCheckMenuItem *, gpointer userdata);
52 static int enable_rtp(disorder_eclient *c,
53 disorder_eclient_no_response *completed,
55 static int disable_rtp(disorder_eclient *c,
56 disorder_eclient_no_response *completed,
59 static double left(double v, double b);
60 static double right(double v, double b);
61 static double volume(double l, double r);
62 static double balance(double l, double r);
64 static void volume_adjusted(GtkAdjustment *a, gpointer user_data);
65 static gchar *format_volume(GtkScale *scale, gdouble value);
66 static gchar *format_balance(GtkScale *scale, gdouble value);
68 static void volume_changed(const char *event,
72 /* Control bar ------------------------------------------------------------- */
74 /** @brief Guard against feedback */
75 int suppress_actions = 1;
77 /** @brief Definition of an icon
79 * The design here is rather mad: rather than changing the image displayed by
80 * icons according to their state, we flip the visibility of pairs of icons.
83 /** @brief Filename for image */
86 /** @brief Text for tooltip */
89 /** @brief Associated menu item or NULL */
92 /** @brief Called to update button when state may have changed */
93 void (*update)(const struct icon *i);
95 /** @brief @ref eclient.h function to call */
96 int (*action)(disorder_eclient *c,
97 disorder_eclient_no_response *completed,
103 /** @brief Pointer to button */
106 /** @brief Pointer to menu item */
110 /** @brief This is the active half of a pair */
111 #define ICON_ACTIVE 0x0001
113 /** @brief This is the inactive half of a pair */
114 #define ICON_INACTIVE 0x0002
116 /** @brief Table of all icons */
117 static struct icon icons[] = {
119 "pause.png", /* icon */
120 "Pause playing track", /* tip */
121 "<GdisorderMain>/Control/Playing", /* menuitem */
122 update_pause, /* update */
123 disorder_eclient_pause, /* action */
124 ICON_ACTIVE, /* flags */
129 "play.png", /* icon */
130 "Resume playing track", /* tip */
131 "<GdisorderMain>/Control/Playing", /* menuitem */
132 update_play, /* update */
133 disorder_eclient_resume, /* action */
134 ICON_INACTIVE, /* flags */
139 "cross.png", /* icon */
140 "Cancel playing track", /* tip */
141 "<GdisorderMain>/Control/Scratch", /* menuitem */
142 update_scratch, /* update */
143 disorder_eclient_scratch_playing, /* action */
149 "random.png", /* icon */
150 "Enable random play", /* tip */
151 "<GdisorderMain>/Control/Random play", /* menuitem */
152 update_random_enable, /* update */
153 disorder_eclient_random_enable, /* action */
154 ICON_INACTIVE, /* flags */
159 "randomcross.png", /* icon */
160 "Disable random play", /* tip */
161 "<GdisorderMain>/Control/Random play", /* menuitem */
162 update_random_disable, /* update */
163 disorder_eclient_random_disable, /* action */
164 ICON_ACTIVE, /* flags */
169 "notes.png", /* icon */
170 "Enable play", /* tip */
172 update_enable, /* update */
173 disorder_eclient_enable, /* action */
174 ICON_INACTIVE, /* flags */
179 "notescross.png", /* icon */
180 "Disable play", /* tip */
182 update_disable, /* update */
183 disorder_eclient_disable, /* action */
184 ICON_ACTIVE, /* flags */
189 "speaker.png", /* icon */
190 "Play network stream", /* tip */
191 "<GdisorderMain>/Control/Network player", /* menuitem */
192 update_rtp, /* update */
193 enable_rtp, /* action */
194 ICON_INACTIVE, /* flags */
199 "speakercross.png", /* icon */
200 "Stop playing network stream", /* tip */
201 "<GdisorderMain>/Control/Network player", /* menuitem */
202 update_nortp, /* update */
203 disable_rtp, /* action */
204 ICON_ACTIVE, /* flags */
210 /** @brief Count of icons */
211 #define NICONS (int)(sizeof icons / sizeof *icons)
213 static GtkAdjustment *volume_adj;
214 static GtkAdjustment *balance_adj;
215 static GtkWidget *volume_widget;
216 static GtkWidget *balance_widget;
218 /** @brief Called whenever last_state changes in any way */
219 void control_monitor(void attribute((unused)) *u) {
221 gboolean volume_supported;
223 D(("control_monitor"));
224 for(n = 0; n < NICONS; ++n)
225 icons[n].update(&icons[n]);
226 /* Only display volume/balance controls if they will work */
228 || (rtp_supported && mixer_supported(DEFAULT_BACKEND)))
229 volume_supported = TRUE;
231 volume_supported = FALSE;
232 (volume_supported ? gtk_widget_show : gtk_widget_hide)(volume_widget);
233 (volume_supported ? gtk_widget_show : gtk_widget_hide)(balance_widget);
236 /** @brief Create the control bar */
237 GtkWidget *control_widget(void) {
238 GtkWidget *hbox = gtk_hbox_new(FALSE, 1), *vbox;
242 D(("control_widget"));
243 assert(mainmenufactory); /* ordering must be right */
244 for(n = 0; n < NICONS; ++n) {
246 icons[n].button = iconbutton(icons[n].icon, icons[n].tip);
247 g_signal_connect(G_OBJECT(icons[n].button), "clicked",
248 G_CALLBACK(clicked_icon), &icons[n]);
249 /* pop the icon in a vbox so it doesn't get vertically stretch if there are
250 * taller things in the control bar */
252 vbox = gtk_vbox_new(FALSE, 0);
253 gtk_box_pack_start(GTK_BOX(vbox), icons[n].button, TRUE, FALSE, 0);
254 gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);
255 if(icons[n].menuitem) {
256 icons[n].item = gtk_item_factory_get_widget(mainmenufactory,
258 switch(icons[n].flags & (ICON_ACTIVE|ICON_INACTIVE)) {
260 g_signal_connect(G_OBJECT(icons[n].item), "toggled",
261 G_CALLBACK(toggled_menu), &icons[n]);
264 /* Don't connect two instances of the signal! */
267 g_signal_connect(G_OBJECT(icons[n].item), "activate",
268 G_CALLBACK(clicked_menu), &icons[n]);
273 /* create the adjustments for the volume control */
275 volume_adj = GTK_ADJUSTMENT(gtk_adjustment_new(0, 0, goesupto,
276 goesupto / 20, goesupto / 20,
279 balance_adj = GTK_ADJUSTMENT(gtk_adjustment_new(0, -1, 1,
281 /* the volume control */
283 volume_widget = gtk_hscale_new(volume_adj);
285 balance_widget = gtk_hscale_new(balance_adj);
286 gtk_widget_set_style(volume_widget, tool_style);
287 gtk_widget_set_style(balance_widget, tool_style);
288 gtk_scale_set_digits(GTK_SCALE(volume_widget), 10);
289 gtk_scale_set_digits(GTK_SCALE(balance_widget), 10);
290 gtk_widget_set_size_request(volume_widget, 192, -1);
291 gtk_widget_set_size_request(balance_widget, 192, -1);
292 gtk_tooltips_set_tip(tips, volume_widget, "Volume", "");
293 gtk_tooltips_set_tip(tips, balance_widget, "Balance", "");
294 gtk_box_pack_start(GTK_BOX(hbox), volume_widget, FALSE, TRUE, 0);
295 gtk_box_pack_start(GTK_BOX(hbox), balance_widget, FALSE, TRUE, 0);
296 /* space updates rather than hammering the server */
297 gtk_range_set_update_policy(GTK_RANGE(volume_widget), GTK_UPDATE_DELAYED);
298 gtk_range_set_update_policy(GTK_RANGE(balance_widget), GTK_UPDATE_DELAYED);
299 /* notice when the adjustments are changed */
300 g_signal_connect(G_OBJECT(volume_adj), "value-changed",
301 G_CALLBACK(volume_adjusted), 0);
302 g_signal_connect(G_OBJECT(balance_adj), "value-changed",
303 G_CALLBACK(volume_adjusted), 0);
304 /* format the volume/balance values ourselves */
305 g_signal_connect(G_OBJECT(volume_widget), "format-value",
306 G_CALLBACK(format_volume), 0);
307 g_signal_connect(G_OBJECT(balance_widget), "format-value",
308 G_CALLBACK(format_balance), 0);
309 register_monitor(control_monitor, 0, -1UL);
310 event_register("volume-changed", volume_changed, 0);
314 /** @brief Update the volume control when it changes */
315 static void volume_changed(const char attribute((unused)) *event,
316 void attribute((unused)) *eventdata,
317 void attribute((unused)) *callbackdata) {
320 D(("volume_changed"));
321 l = volume_l / 100.0;
322 r = volume_r / 100.0;
324 gtk_adjustment_set_value(volume_adj, volume(l, r) * goesupto);
325 gtk_adjustment_set_value(balance_adj, balance(l, r));
329 /** @brief Update the state of one of the control icons
330 * @param icon Target icon
331 * @param visible True if this version of the button should be visible
332 * @param usable True if the button is currently usable
334 * Several of the icons, rather bizarrely, come in pairs: for instance exactly
335 * one of the play and pause buttons is supposed to be visible at any given
338 * @p usable need not take into account server availability, that is done
341 static void update_icon(const struct icon *icon,
342 int visible, int usable) {
343 /* If the connection is down nothing is ever usable */
344 if(!(last_state & DISORDER_CONNECTED))
346 (visible ? gtk_widget_show : gtk_widget_hide)(icon->button);
347 /* Only both updating usability if the button is visible */
349 gtk_widget_set_sensitive(icon->button, usable);
351 /* There's an associated menu item. These are always visible, but may not
353 if((icon->flags & (ICON_ACTIVE|ICON_INACTIVE)) == ICON_ACTIVE) {
354 /* The active half of a pair */
355 gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(icon->item), visible);
357 gtk_widget_set_sensitive(icon->item, usable);
361 static void update_pause(const struct icon *icon) {
362 const int visible = !(last_state & DISORDER_TRACK_PAUSED);
363 const int usable = !!(last_state & DISORDER_PLAYING); /* TODO: might be a lie */
364 update_icon(icon, visible, usable);
367 static void update_play(const struct icon *icon) {
368 const int visible = !!(last_state & DISORDER_TRACK_PAUSED);
369 const int usable = !!(last_state & DISORDER_PLAYING);
370 update_icon(icon, visible, usable);
373 static void update_scratch(const struct icon *icon) {
374 const int visible = 1;
375 const int usable = !!(last_state & DISORDER_PLAYING);
376 update_icon(icon, visible, usable);
379 static void update_random_enable(const struct icon *icon) {
380 const int visible = !(last_state & DISORDER_RANDOM_ENABLED);
381 const int usable = 1;
382 update_icon(icon, visible, usable);
385 static void update_random_disable(const struct icon *icon) {
386 const int visible = !!(last_state & DISORDER_RANDOM_ENABLED);
387 const int usable = 1;
388 update_icon(icon, visible, usable);
391 static void update_enable(const struct icon *icon) {
392 const int visible = !(last_state & DISORDER_PLAYING_ENABLED);
393 const int usable = 1;
394 update_icon(icon, visible, usable);
397 static void update_disable(const struct icon *icon) {
398 const int visible = !!(last_state & DISORDER_PLAYING_ENABLED);
399 const int usable = 1;
400 update_icon(icon, visible, usable);
403 static void update_rtp(const struct icon *icon) {
404 const int visible = !rtp_is_running;
405 const int usable = rtp_supported;
406 update_icon(icon, visible, usable);
409 static void update_nortp(const struct icon *icon) {
410 const int visible = rtp_is_running;
411 const int usable = rtp_supported;
412 update_icon(icon, visible, usable);
415 static void icon_action_completed(void attribute((unused)) *v,
418 popup_protocol_error(0, error);
421 static void clicked_icon(GtkButton attribute((unused)) *button,
423 const struct icon *icon = userdata;
425 if(!suppress_actions)
426 icon->action(client, icon_action_completed, 0);
429 static void clicked_menu(GtkMenuItem attribute((unused)) *menuitem,
431 const struct icon *icon = userdata;
433 if(!suppress_actions)
434 icon->action(client, icon_action_completed, 0);
437 static void toggled_menu(GtkCheckMenuItem *menuitem,
439 const struct icon *icon = userdata;
444 /* This is a bit fiddlier than the others, we need to find the action for the
445 * new state. If the new state is active then we want the ICON_INACTIVE
446 * version and vica versa. */
447 for(n = 0; n < NICONS; ++n)
448 if(icons[n].item == icon->item
449 && !!(icons[n].flags & ICON_INACTIVE) == !!menuitem->active)
452 icons[n].action(client, icon_action_completed, 0);
455 /** @brief Called when a volume command completes */
456 static void volume_completed(void attribute((unused)) *v,
458 int attribute((unused)) l,
459 int attribute((unused)) r) {
461 popup_protocol_error(0, error);
462 /* We don't set the UI's notion of the volume here, it is set from the log
463 * regardless of the reason it changed */
466 /** @brief Called when the volume has been adjusted */
467 static void volume_adjusted(GtkAdjustment attribute((unused)) *a,
468 gpointer attribute((unused)) user_data) {
469 double v = gtk_adjustment_get_value(volume_adj) / goesupto;
470 double b = gtk_adjustment_get_value(balance_adj);
473 /* This is the result of an update from the server, not a change from the
474 * user. Don't feedback! */
476 D(("volume_adjusted"));
477 /* force to 'stereotypical' values */
478 v = nearbyint(100 * v) / 100;
479 b = nearbyint(5 * b) / 5;
480 /* Set the volume. We don't want a reply, we'll get the actual new volume
483 int l = nearbyint(left(v, b) * 100), r = nearbyint(right(v, b) * 100);
484 mixer_control(DEFAULT_BACKEND, &l, &r, 1);
486 disorder_eclient_volume(client, volume_completed,
487 nearbyint(left(v, b) * 100),
488 nearbyint(right(v, b) * 100),
492 /** @brief Formats the volume value */
493 static gchar *format_volume(GtkScale attribute((unused)) *scale,
497 snprintf(s, sizeof s, "%.1f", (double)value);
501 /** @brief Formats the balance value */
502 static gchar *format_balance(GtkScale attribute((unused)) *scale,
506 if(fabs(value) < 0.1)
507 return g_strdup("0");
508 snprintf(s, sizeof s, "%+.1f", (double)value);
512 /* Volume mapping. We consider left, right, volume to be in [0,1]
513 * and balance to be in [-1,1].
515 * First, we just have volume = max(left, right).
517 * Balance we consider to linearly represent the amount by which the quieter
518 * channel differs from the louder. In detail:
520 * if right > left then balance > 0:
521 * balance = 0 => left = right (as an endpoint, not an instance)
522 * balance = 1 => left = 0
523 * fitting to linear, left = right * (1 - balance)
524 * so balance = 1 - left / right
525 * (right > left => right > 0 so no division by 0.)
527 * if left > right then balance < 0:
528 * balance = 0 => right = left (same caveat as above)
529 * balance = -1 => right = 0
530 * again fitting to linear, right = left * (1 + balance)
531 * so balance = right / left - 1
532 * (left > right => left > 0 so no division by 0.)
534 * if left = right then we just have balance = 0.
536 * Thanks to Clive and Andrew.
539 /** @brief Return the greater of @p x and @p y */
540 static double max(double x, double y) {
541 return x > y ? x : y;
544 /** @brief Compute the left channel volume */
545 static double left(double v, double b) {
546 if(b > 0) /* volume = right */
548 else /* volume = left */
552 /** @brief Compute the right channel volume */
553 static double right(double v, double b) {
554 if(b > 0) /* volume = right */
556 else /* volume = left */
560 /** @brief Compute the overall volume */
561 static double volume(double l, double r) {
565 /** @brief Compute the balance */
566 static double balance(double l, double r) {
571 else /* left = right */
575 /** @brief Called to enable RTP play
577 * Rather odd signature is to fit in with the other icons which all call @ref
578 * lib/eclient.h functions.
580 static int enable_rtp(disorder_eclient attribute((unused)) *c,
581 disorder_eclient_no_response attribute((unused)) *completed,
582 void attribute((unused)) *v) {
587 /** @brief Called to disable RTP play
589 * Rather odd signature is to fit in with the other icons which all call @ref
590 * lib/eclient.h functions.
592 static int disable_rtp(disorder_eclient attribute((unused)) *c,
593 disorder_eclient_no_response attribute((unused)) *completed,
594 void attribute((unused)) *v) {