2 * This file is part of DisOrder.
3 * Copyright (C) 2006-2008 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_icon(const struct icon *icon);
40 static void clicked_icon(GtkButton *, gpointer);
41 static void clicked_menu(GtkMenuItem *, gpointer userdata);
42 static void toggled_menu(GtkCheckMenuItem *, gpointer userdata);
44 static int enable_rtp(disorder_eclient *c,
45 disorder_eclient_no_response *completed,
47 static int disable_rtp(disorder_eclient *c,
48 disorder_eclient_no_response *completed,
51 static double left(double v, double b);
52 static double right(double v, double b);
53 static double volume(double l, double r);
54 static double balance(double l, double r);
56 static void volume_adjusted(GtkAdjustment *a, gpointer user_data);
57 static gchar *format_volume(GtkScale *scale, gdouble value);
58 static gchar *format_balance(GtkScale *scale, gdouble value);
60 static void volume_changed(const char *event,
64 /* Control bar ------------------------------------------------------------- */
66 /** @brief Guard against feedback */
67 int suppress_actions = 1;
69 /** @brief Definition of an icon
71 * We have two kinds of icon:
72 * - action icons, which just do something but don't have a state as such
73 * - toggle icons, which toggle between two states ("on" and "off").
75 * The scratch button is an action icon; currently all the others are toggle
78 * (All icons can be sensitive or insensitive, separately to the above.)
81 /** @brief Filename for 'on' image */
84 /** @brief Text for 'on' tooltip */
87 /** @brief Filename for 'off' image or NULL for an action icon */
90 /** @brief Text for 'off tooltip */
93 /** @brief Associated menu item or NULL */
96 /** @brief @ref eclient.h function to call to go from off to on
98 * For action buttons, this should be NULL.
100 int (*action_go_on)(disorder_eclient *c,
101 disorder_eclient_no_response *completed,
104 /** @brief @ref eclient.h function to call to go from on to off
106 * For action buttons, this action is used.
108 int (*action_go_off)(disorder_eclient *c,
109 disorder_eclient_no_response *completed,
112 /** @brief Get button state
113 * @return 1 for on, 0 for off
117 /** @brief Get button sensitivity
118 * @return 1 for sensitive, 0 for insensitive
120 * Can be NULL for always sensitive.
122 int (*sensitive)(void);
124 /** @brief Pointer to button */
127 /** @brief Pointer to menu item */
131 GtkWidget *image_off;
134 /* TODO: Add rights into the mix below */
136 static int pause_resume_on(void) {
137 return !(last_state & DISORDER_TRACK_PAUSED);
140 static int pause_resume_sensitive(void) {
141 return !!(last_state & DISORDER_PLAYING)
142 && (last_rights & RIGHT_PAUSE);
145 static int scratch_sensitive(void) {
146 return !!(last_state & DISORDER_PLAYING)
147 && (last_rights & RIGHT_SCRATCH__MASK);
148 /* TODO: it's more complicated than that... */
151 static int random_sensitive(void) {
152 return !!(last_rights & RIGHT_GLOBAL_PREFS);
155 static int random_enabled(void) {
156 return !!(last_state & DISORDER_RANDOM_ENABLED);
159 static int playing_sensitive(void) {
160 return !!(last_rights & RIGHT_GLOBAL_PREFS);
163 static int playing_enabled(void) {
164 return !!(last_state & DISORDER_PLAYING_ENABLED);
167 static int rtp_enabled(void) {
168 return rtp_is_running;
171 static int rtp_sensitive(void) {
172 return rtp_supported;
175 /** @brief Table of all icons */
176 static struct icon icons[] = {
178 icon_on: "pause.png",
179 tip_on: "Pause playing track",
180 icon_off: "play.png",
181 tip_off: "Resume playing track",
182 menuitem: "<GdisorderMain>/Control/Playing",
184 sensitive: pause_resume_sensitive,
185 action_go_on: disorder_eclient_resume,
186 action_go_off: disorder_eclient_pause,
189 icon_on: "cross.png",
190 tip_on: "Cancel playing track",
191 menuitem: "<GdisorderMain>/Control/Scratch",
192 sensitive: scratch_sensitive,
193 action_go_off: disorder_eclient_scratch_playing,
196 icon_on: "randomcross.png",
197 tip_on: "Disable random play",
198 icon_off: "random.png",
199 tip_off: "Enable random play",
200 menuitem: "<GdisorderMain>/Control/Random play",
202 sensitive: random_sensitive,
203 action_go_on: disorder_eclient_random_enable,
204 action_go_off: disorder_eclient_random_disable,
207 icon_on: "notescross.png",
208 tip_on: "Disable play",
209 icon_off: "notes.png",
210 tip_off: "Enable play",
212 sensitive: playing_sensitive,
213 action_go_on: disorder_eclient_enable,
214 action_go_off: disorder_eclient_disable,
217 icon_on: "speakercross.png",
218 tip_on: "Stop playing network stream",
219 icon_off: "speaker.png",
220 tip_off: "Play network stream",
221 menuitem: "<GdisorderMain>/Control/Network player",
223 sensitive: rtp_sensitive,
224 action_go_on: enable_rtp,
225 action_go_off: disable_rtp
229 /** @brief Count of icons */
230 #define NICONS (int)(sizeof icons / sizeof *icons)
232 static GtkAdjustment *volume_adj;
233 static GtkAdjustment *balance_adj;
234 static GtkWidget *volume_widget;
235 static GtkWidget *balance_widget;
237 /** @brief Called whenever last_state changes in any way
239 * TODO we should only update things that have changed.
241 static void control_changed(const char attribute((unused)) *event,
242 void attribute((unused)) *evendata,
243 void attribute((unused)) *callbackdata) {
245 gboolean volume_supported;
247 D(("control_changed"));
248 /* Update all the icons */
249 for(n = 0; n < NICONS; ++n)
250 update_icon(&icons[n]);
251 /* Only display volume/balance controls if they will work */
253 || (rtp_supported && mixer_supported(DEFAULT_BACKEND)))
254 volume_supported = TRUE;
256 volume_supported = FALSE;
257 (volume_supported ? gtk_widget_show : gtk_widget_hide)(volume_widget);
258 (volume_supported ? gtk_widget_show : gtk_widget_hide)(balance_widget);
261 /** @brief Create the control bar */
262 GtkWidget *control_widget(void) {
263 GtkWidget *hbox = gtk_hbox_new(FALSE, 1), *vbox;
267 D(("control_widget"));
268 assert(mainmenufactory); /* ordering must be right */
269 for(n = 0; n < NICONS; ++n) {
270 /* Create the button */
272 icons[n].button = gtk_button_new();
273 gtk_widget_set_style(icons[n].button, tool_style);
274 icons[n].image_on = gtk_image_new_from_pixbuf(find_image(icons[n].icon_on));
275 gtk_widget_set_style(icons[n].image_on, tool_style);
276 g_object_ref(icons[n].image_on);
277 /* If it's a toggle icon, create the 'off' half too */
278 if(icons[n].icon_off) {
279 icons[n].image_off = gtk_image_new_from_pixbuf(find_image(icons[n].icon_off));
280 gtk_widget_set_style(icons[n].image_off, tool_style);
281 g_object_ref(icons[n].image_off);
283 g_signal_connect(G_OBJECT(icons[n].button), "clicked",
284 G_CALLBACK(clicked_icon), &icons[n]);
285 /* pop the icon in a vbox so it doesn't get vertically stretch if there are
286 * taller things in the control bar */
288 vbox = gtk_vbox_new(FALSE, 0);
289 gtk_box_pack_start(GTK_BOX(vbox), icons[n].button, TRUE, FALSE, 0);
290 gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);
291 if(icons[n].menuitem) {
292 /* Find the menu item */
293 icons[n].item = gtk_item_factory_get_widget(mainmenufactory,
295 if(icons[n].icon_off)
296 g_signal_connect(G_OBJECT(icons[n].item), "toggled",
297 G_CALLBACK(toggled_menu), &icons[n]);
299 g_signal_connect(G_OBJECT(icons[n].item), "activate",
300 G_CALLBACK(clicked_menu), &icons[n]);
303 /* create the adjustments for the volume control */
305 volume_adj = GTK_ADJUSTMENT(gtk_adjustment_new(0, 0, goesupto,
306 goesupto / 20, goesupto / 20,
309 balance_adj = GTK_ADJUSTMENT(gtk_adjustment_new(0, -1, 1,
311 /* the volume control */
313 volume_widget = gtk_hscale_new(volume_adj);
315 balance_widget = gtk_hscale_new(balance_adj);
316 gtk_widget_set_style(volume_widget, tool_style);
317 gtk_widget_set_style(balance_widget, tool_style);
318 gtk_scale_set_digits(GTK_SCALE(volume_widget), 10);
319 gtk_scale_set_digits(GTK_SCALE(balance_widget), 10);
320 gtk_widget_set_size_request(volume_widget, 192, -1);
321 gtk_widget_set_size_request(balance_widget, 192, -1);
322 gtk_tooltips_set_tip(tips, volume_widget, "Volume", "");
323 gtk_tooltips_set_tip(tips, balance_widget, "Balance", "");
324 gtk_box_pack_start(GTK_BOX(hbox), volume_widget, FALSE, TRUE, 0);
325 gtk_box_pack_start(GTK_BOX(hbox), balance_widget, FALSE, TRUE, 0);
326 /* space updates rather than hammering the server */
327 gtk_range_set_update_policy(GTK_RANGE(volume_widget), GTK_UPDATE_DELAYED);
328 gtk_range_set_update_policy(GTK_RANGE(balance_widget), GTK_UPDATE_DELAYED);
329 /* notice when the adjustments are changed */
330 g_signal_connect(G_OBJECT(volume_adj), "value-changed",
331 G_CALLBACK(volume_adjusted), 0);
332 g_signal_connect(G_OBJECT(balance_adj), "value-changed",
333 G_CALLBACK(volume_adjusted), 0);
334 /* format the volume/balance values ourselves */
335 g_signal_connect(G_OBJECT(volume_widget), "format-value",
336 G_CALLBACK(format_volume), 0);
337 g_signal_connect(G_OBJECT(balance_widget), "format-value",
338 G_CALLBACK(format_balance), 0);
339 event_register("enabled-changed", control_changed, 0);
340 event_register("random-changed", control_changed, 0);
341 event_register("pause-changed", control_changed, 0);
342 event_register("playing-changed", control_changed, 0);
343 event_register("rtp-changed", control_changed, 0);
344 event_register("rights-changed", control_changed, 0);
345 event_register("volume-changed", volume_changed, 0);
349 /** @brief Update the volume control when it changes */
350 static void volume_changed(const char attribute((unused)) *event,
351 void attribute((unused)) *eventdata,
352 void attribute((unused)) *callbackdata) {
355 D(("volume_changed"));
356 l = volume_l / 100.0;
357 r = volume_r / 100.0;
359 gtk_adjustment_set_value(volume_adj, volume(l, r) * goesupto);
360 gtk_adjustment_set_value(balance_adj, balance(l, r));
364 /** @brief Update the state of one of the control icons
365 * @param icon Target icon
367 static void update_icon(const struct icon *icon) {
368 int on = icon->on ? icon->on() : 1;
369 int sensitive = icon->sensitive ? icon->sensitive() : 1;
370 GtkWidget *child, *newchild;
373 /* If the connection is down nothing is ever usable */
374 if(!(last_state & DISORDER_CONNECTED))
376 /* Replace the child */
377 newchild = on ? icon->image_on : icon->image_off;
378 child = gtk_bin_get_child(GTK_BIN(icon->button));
379 if(child != newchild) {
381 gtk_container_remove(GTK_CONTAINER(icon->button), child);
382 gtk_container_add(GTK_CONTAINER(icon->button), newchild);
383 gtk_widget_show(newchild);
386 gtk_tooltips_set_tip(tips, icon->button,
387 on ? icon->tip_on : icon->tip_off, "");
388 gtk_widget_set_sensitive(icon->button, sensitive);
389 /* Icons with an associated menu item */
392 gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(icon->item), on);
393 gtk_widget_set_sensitive(icon->item, sensitive);
398 static void icon_action_completed(void attribute((unused)) *v,
401 popup_protocol_error(0, error);
404 static void clicked_icon(GtkButton attribute((unused)) *button,
406 const struct icon *icon = userdata;
410 if(!icon->on || icon->on())
411 icon->action_go_off(client, icon_action_completed, 0);
413 icon->action_go_on(client, icon_action_completed, 0);
416 static void clicked_menu(GtkMenuItem attribute((unused)) *menuitem,
418 clicked_icon(NULL, userdata);
421 static void toggled_menu(GtkCheckMenuItem attribute((unused)) *menuitem,
423 clicked_icon(NULL, userdata);
426 /** @brief Called when a volume command completes */
427 static void volume_completed(void attribute((unused)) *v,
429 int attribute((unused)) l,
430 int attribute((unused)) r) {
432 popup_protocol_error(0, error);
433 /* We don't set the UI's notion of the volume here, it is set from the log
434 * regardless of the reason it changed */
437 /** @brief Called when the volume has been adjusted */
438 static void volume_adjusted(GtkAdjustment attribute((unused)) *a,
439 gpointer attribute((unused)) user_data) {
440 double v = gtk_adjustment_get_value(volume_adj) / goesupto;
441 double b = gtk_adjustment_get_value(balance_adj);
444 /* This is the result of an update from the server, not a change from the
445 * user. Don't feedback! */
447 D(("volume_adjusted"));
448 /* force to 'stereotypical' values */
449 v = nearbyint(100 * v) / 100;
450 b = nearbyint(5 * b) / 5;
451 /* Set the volume. We don't want a reply, we'll get the actual new volume
454 int l = nearbyint(left(v, b) * 100), r = nearbyint(right(v, b) * 100);
455 mixer_control(DEFAULT_BACKEND, &l, &r, 1);
457 disorder_eclient_volume(client, volume_completed,
458 nearbyint(left(v, b) * 100),
459 nearbyint(right(v, b) * 100),
463 /** @brief Formats the volume value */
464 static gchar *format_volume(GtkScale attribute((unused)) *scale,
468 snprintf(s, sizeof s, "%.1f", (double)value);
472 /** @brief Formats the balance value */
473 static gchar *format_balance(GtkScale attribute((unused)) *scale,
477 if(fabs(value) < 0.1)
478 return g_strdup("0");
479 snprintf(s, sizeof s, "%+.1f", (double)value);
483 /* Volume mapping. We consider left, right, volume to be in [0,1]
484 * and balance to be in [-1,1].
486 * First, we just have volume = max(left, right).
488 * Balance we consider to linearly represent the amount by which the quieter
489 * channel differs from the louder. In detail:
491 * if right > left then balance > 0:
492 * balance = 0 => left = right (as an endpoint, not an instance)
493 * balance = 1 => left = 0
494 * fitting to linear, left = right * (1 - balance)
495 * so balance = 1 - left / right
496 * (right > left => right > 0 so no division by 0.)
498 * if left > right then balance < 0:
499 * balance = 0 => right = left (same caveat as above)
500 * balance = -1 => right = 0
501 * again fitting to linear, right = left * (1 + balance)
502 * so balance = right / left - 1
503 * (left > right => left > 0 so no division by 0.)
505 * if left = right then we just have balance = 0.
507 * Thanks to Clive and Andrew.
510 /** @brief Return the greater of @p x and @p y */
511 static double max(double x, double y) {
512 return x > y ? x : y;
515 /** @brief Compute the left channel volume */
516 static double left(double v, double b) {
517 if(b > 0) /* volume = right */
519 else /* volume = left */
523 /** @brief Compute the right channel volume */
524 static double right(double v, double b) {
525 if(b > 0) /* volume = right */
527 else /* volume = left */
531 /** @brief Compute the overall volume */
532 static double volume(double l, double r) {
536 /** @brief Compute the balance */
537 static double balance(double l, double r) {
542 else /* left = right */
546 /** @brief Called to enable RTP play
548 * Rather odd signature is to fit in with the other icons which all call @ref
549 * lib/eclient.h functions.
551 static int enable_rtp(disorder_eclient attribute((unused)) *c,
552 disorder_eclient_no_response attribute((unused)) *completed,
553 void attribute((unused)) *v) {
558 /** @brief Called to disable RTP play
560 * Rather odd signature is to fit in with the other icons which all call @ref
561 * lib/eclient.h functions.
563 static int disable_rtp(disorder_eclient attribute((unused)) *c,
564 disorder_eclient_no_response attribute((unused)) *completed,
565 void attribute((unused)) *v) {