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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
eb525fcd | 3 | * Copyright (C) 2006, 2007 Richard Kettlewell |
460b9539 | 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, 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. | |
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 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include "disobedience.h" | |
22 | ||
e9b70a84 | 23 | /* Forward declarations ---------------------------------------------------- */ |
24 | ||
25 | WT(adjustment); | |
26 | WT(hscale); | |
27 | WT(hbox); | |
28 | WT(tooltips); | |
29 | WT(button); | |
30 | WT(image); | |
31 | WT(label); | |
32 | WT(vbox); | |
460b9539 | 33 | |
34 | struct icon; | |
35 | ||
36 | static void update_pause(const struct icon *); | |
37 | static void update_play(const struct icon *); | |
38 | static void update_scratch(const struct icon *); | |
39 | static void update_random_enable(const struct icon *); | |
40 | static void update_random_disable(const struct icon *); | |
41 | static void update_enable(const struct icon *); | |
42 | static void update_disable(const struct icon *); | |
43 | static void clicked_icon(GtkButton *, gpointer); | |
44 | ||
45 | static double left(double v, double b); | |
46 | static double right(double v, double b); | |
47 | static double volume(double l, double r); | |
48 | static double balance(double l, double r); | |
49 | ||
50 | static void volume_adjusted(GtkAdjustment *a, gpointer user_data); | |
51 | static gchar *format_volume(GtkScale *scale, gdouble value); | |
52 | static gchar *format_balance(GtkScale *scale, gdouble value); | |
53 | ||
00959300 RK |
54 | static void control_monitor(void *u); |
55 | ||
460b9539 | 56 | /* Control bar ------------------------------------------------------------- */ |
57 | ||
58 | static int suppress_set_volume; | |
59 | /* Guard against feedback loop in volume control */ | |
60 | ||
61 | static struct icon { | |
62 | const char *icon; | |
63 | const char *tip; | |
64 | void (*clicked)(GtkButton *button, gpointer userdata); | |
65 | void (*update)(const struct icon *i); | |
66 | int (*action)(disorder_eclient *c, | |
67 | disorder_eclient_no_response *completed, | |
68 | void *v); | |
69 | GtkWidget *button; | |
70 | } icons[] = { | |
71 | { "pause.png", "Pause playing track", clicked_icon, update_pause, | |
72 | disorder_eclient_pause, 0 }, | |
73 | { "play.png", "Resume playing track", clicked_icon, update_play, | |
74 | disorder_eclient_resume, 0 }, | |
75 | { "cross.png", "Cancel playing track", clicked_icon, update_scratch, | |
76 | disorder_eclient_scratch_playing, 0 }, | |
77 | { "random.png", "Enable random play", clicked_icon, update_random_enable, | |
78 | disorder_eclient_random_enable, 0 }, | |
79 | { "randomcross.png", "Disable random play", clicked_icon, update_random_disable, | |
80 | disorder_eclient_random_disable, 0 }, | |
81 | { "notes.png", "Enable play", clicked_icon, update_enable, | |
82 | disorder_eclient_enable, 0 }, | |
83 | { "notescross.png", "Disable play", clicked_icon, update_disable, | |
84 | disorder_eclient_disable, 0 }, | |
85 | }; | |
86 | #define NICONS (int)(sizeof icons / sizeof *icons) | |
87 | ||
88 | GtkAdjustment *volume_adj, *balance_adj; | |
89 | ||
90 | /* Create the control bar */ | |
e9b70a84 | 91 | GtkWidget *control_widget(void) { |
460b9539 | 92 | GtkWidget *hbox = gtk_hbox_new(FALSE, 1), *vbox; |
93 | GtkWidget *content; | |
94 | GdkPixbuf *pb; | |
95 | GtkWidget *v, *b; | |
96 | GtkTooltips *tips = gtk_tooltips_new(); | |
97 | int n; | |
98 | ||
e9b70a84 | 99 | NW(hbox); |
100 | NW(tooltips); | |
460b9539 | 101 | D(("control_widget")); |
102 | for(n = 0; n < NICONS; ++n) { | |
e9b70a84 | 103 | NW(button); |
460b9539 | 104 | icons[n].button = gtk_button_new(); |
e9b70a84 | 105 | if((pb = find_image(icons[n].icon))) { |
106 | NW(image); | |
460b9539 | 107 | content = gtk_image_new_from_pixbuf(pb); |
e9b70a84 | 108 | } else { |
109 | NW(label); | |
460b9539 | 110 | content = gtk_label_new(icons[n].icon); |
e9b70a84 | 111 | } |
460b9539 | 112 | gtk_container_add(GTK_CONTAINER(icons[n].button), content); |
113 | gtk_tooltips_set_tip(tips, icons[n].button, icons[n].tip, ""); | |
114 | g_signal_connect(G_OBJECT(icons[n].button), "clicked", | |
115 | G_CALLBACK(icons[n].clicked), &icons[n]); | |
116 | /* pop the icon in a vbox so it doesn't get vertically stretch if there are | |
117 | * taller things in the control bar */ | |
e9b70a84 | 118 | NW(vbox); |
460b9539 | 119 | vbox = gtk_vbox_new(FALSE, 0); |
120 | gtk_box_pack_start(GTK_BOX(vbox), icons[n].button, TRUE, FALSE, 0); | |
121 | gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0); | |
122 | } | |
123 | /* create the adjustments for the volume control */ | |
e9b70a84 | 124 | NW(adjustment); |
460b9539 | 125 | volume_adj = GTK_ADJUSTMENT(gtk_adjustment_new(0, 0, goesupto, |
126 | goesupto / 20, goesupto / 20, | |
127 | 0)); | |
e9b70a84 | 128 | NW(adjustment); |
460b9539 | 129 | balance_adj = GTK_ADJUSTMENT(gtk_adjustment_new(0, -1, 1, |
130 | 0.2, 0.2, 0)); | |
131 | /* the volume control */ | |
e9b70a84 | 132 | NW(hscale); |
460b9539 | 133 | v = gtk_hscale_new(volume_adj); |
e9b70a84 | 134 | NW(hscale); |
460b9539 | 135 | b = gtk_hscale_new(balance_adj); |
136 | gtk_scale_set_digits(GTK_SCALE(v), 10); | |
137 | gtk_scale_set_digits(GTK_SCALE(b), 10); | |
138 | gtk_widget_set_size_request(v, 192, -1); | |
139 | gtk_widget_set_size_request(b, 192, -1); | |
140 | gtk_tooltips_set_tip(tips, v, "Volume", ""); | |
141 | gtk_tooltips_set_tip(tips, b, "Balance", ""); | |
142 | gtk_box_pack_start(GTK_BOX(hbox), v, FALSE, TRUE, 0); | |
143 | gtk_box_pack_start(GTK_BOX(hbox), b, FALSE, TRUE, 0); | |
144 | /* space updates rather than hammering the server */ | |
145 | gtk_range_set_update_policy(GTK_RANGE(v), GTK_UPDATE_DELAYED); | |
146 | gtk_range_set_update_policy(GTK_RANGE(b), GTK_UPDATE_DELAYED); | |
147 | /* notice when the adjustments are changed */ | |
148 | g_signal_connect(G_OBJECT(volume_adj), "value-changed", | |
149 | G_CALLBACK(volume_adjusted), 0); | |
150 | g_signal_connect(G_OBJECT(balance_adj), "value-changed", | |
151 | G_CALLBACK(volume_adjusted), 0); | |
152 | /* format the volume/balance values ourselves */ | |
153 | g_signal_connect(G_OBJECT(v), "format-value", | |
154 | G_CALLBACK(format_volume), 0); | |
155 | g_signal_connect(G_OBJECT(b), "format-value", | |
156 | G_CALLBACK(format_balance), 0); | |
00959300 | 157 | register_monitor(control_monitor, 0, -1UL); |
460b9539 | 158 | return hbox; |
159 | } | |
160 | ||
ad58ebcc | 161 | /** @brief Update the control bar after some kind of state change */ |
460b9539 | 162 | void control_update(void) { |
460b9539 | 163 | double l, r; |
164 | ||
165 | D(("control_update")); | |
00959300 | 166 | /*control_monitor(0, disorder_eclient_state(client));*/ |
460b9539 | 167 | l = volume_l / 100.0; |
168 | r = volume_r / 100.0; | |
00959300 | 169 | ++suppress_set_volume; |
460b9539 | 170 | gtk_adjustment_set_value(volume_adj, volume(l, r) * goesupto); |
171 | gtk_adjustment_set_value(balance_adj, balance(l, r)); | |
172 | --suppress_set_volume; | |
173 | } | |
174 | ||
00959300 RK |
175 | static void control_monitor(void attribute((unused)) *u) { |
176 | int n; | |
177 | ||
00959300 RK |
178 | for(n = 0; n < NICONS; ++n) |
179 | icons[n].update(&icons[n]); | |
00959300 RK |
180 | } |
181 | ||
ad58ebcc | 182 | /** @brief Update the state of one of the control icons |
00959300 | 183 | * @param icon Target icon |
ad58ebcc | 184 | * @param visible True if this version of the button should be visible |
185 | * @param usable True if the button is currently usable | |
186 | * | |
187 | * Several of the icons, rather bizarrely, come in pairs: for instance exactly | |
188 | * one of the play and pause buttons is supposed to be visible at any given | |
189 | * moment. | |
190 | * | |
191 | * @p usable need not take into account server availability, that is done | |
192 | * automatically. | |
193 | */ | |
00959300 | 194 | static void update_icon(const struct icon *icon, |
ad58ebcc | 195 | int visible, int usable) { |
196 | /* If the connection is down nothing is ever usable */ | |
00959300 | 197 | if(!(last_state & DISORDER_CONNECTED)) |
ad58ebcc | 198 | usable = 0; |
00959300 | 199 | (visible ? gtk_widget_show : gtk_widget_hide)(icon->button); |
ad58ebcc | 200 | /* Only both updating usability if the button is visible */ |
201 | if(visible) | |
00959300 | 202 | gtk_widget_set_sensitive(icon->button, usable); |
460b9539 | 203 | } |
204 | ||
205 | static void update_pause(const struct icon *icon) { | |
00959300 RK |
206 | const int visible = !(last_state & DISORDER_TRACK_PAUSED); |
207 | const int usable = !!(last_state & DISORDER_PLAYING); /* TODO: might be a lie */ | |
208 | update_icon(icon, visible, usable); | |
460b9539 | 209 | } |
210 | ||
211 | static void update_play(const struct icon *icon) { | |
00959300 RK |
212 | const int visible = !!(last_state & DISORDER_TRACK_PAUSED); |
213 | const int usable = !!(last_state & DISORDER_PLAYING); | |
214 | update_icon(icon, visible, usable); | |
460b9539 | 215 | } |
216 | ||
217 | static void update_scratch(const struct icon *icon) { | |
00959300 RK |
218 | const int visible = 1; |
219 | const int usable = !!(last_state & DISORDER_PLAYING); | |
220 | update_icon(icon, visible, usable); | |
460b9539 | 221 | } |
222 | ||
223 | static void update_random_enable(const struct icon *icon) { | |
00959300 RK |
224 | const int visible = !(last_state & DISORDER_RANDOM_ENABLED); |
225 | const int usable = 1; | |
226 | update_icon(icon, visible, usable); | |
460b9539 | 227 | } |
228 | ||
229 | static void update_random_disable(const struct icon *icon) { | |
00959300 RK |
230 | const int visible = !!(last_state & DISORDER_RANDOM_ENABLED); |
231 | const int usable = 1; | |
232 | update_icon(icon, visible, usable); | |
460b9539 | 233 | } |
234 | ||
235 | static void update_enable(const struct icon *icon) { | |
00959300 RK |
236 | const int visible = !(last_state & DISORDER_PLAYING_ENABLED); |
237 | const int usable = 1; | |
238 | update_icon(icon, visible, usable); | |
460b9539 | 239 | } |
240 | ||
241 | static void update_disable(const struct icon *icon) { | |
00959300 RK |
242 | const int visible = !!(last_state & DISORDER_PLAYING_ENABLED); |
243 | const int usable = 1; | |
244 | update_icon(icon, visible, usable); | |
460b9539 | 245 | } |
246 | ||
247 | static void clicked_icon(GtkButton attribute((unused)) *button, | |
248 | gpointer userdata) { | |
249 | const struct icon *icon = userdata; | |
250 | ||
251 | icon->action(client, 0, 0); | |
252 | } | |
253 | ||
254 | static void volume_adjusted(GtkAdjustment attribute((unused)) *a, | |
255 | gpointer attribute((unused)) user_data) { | |
256 | double v = gtk_adjustment_get_value(volume_adj) / goesupto; | |
257 | double b = gtk_adjustment_get_value(balance_adj); | |
258 | ||
259 | if(suppress_set_volume) | |
260 | /* This is the result of an update from the server, not a change from the | |
261 | * user. Don't feedback! */ | |
262 | return; | |
263 | D(("volume_adjusted")); | |
264 | /* force to 'stereotypical' values */ | |
265 | v = nearbyint(100 * v) / 100; | |
266 | b = nearbyint(5 * b) / 5; | |
267 | /* Set the volume. We don't want a reply, we'll get the actual new volume | |
268 | * from the log. */ | |
269 | disorder_eclient_volume(client, 0, | |
270 | nearbyint(left(v, b) * 100), | |
271 | nearbyint(right(v, b) * 100), | |
272 | 0); | |
273 | } | |
274 | ||
275 | /* Called to format the volume value */ | |
276 | static gchar *format_volume(GtkScale attribute((unused)) *scale, | |
277 | gdouble value) { | |
278 | char s[32]; | |
279 | ||
280 | snprintf(s, sizeof s, "%.1f", (double)value); | |
2fc4475d | 281 | return g_strdup(s); |
460b9539 | 282 | } |
283 | ||
284 | /* Called to format the balance value. */ | |
285 | static gchar *format_balance(GtkScale attribute((unused)) *scale, | |
286 | gdouble value) { | |
287 | char s[32]; | |
288 | ||
289 | if(fabs(value) < 0.1) | |
2fc4475d | 290 | return g_strdup("0"); |
460b9539 | 291 | snprintf(s, sizeof s, "%+.1f", (double)value); |
2fc4475d | 292 | return g_strdup(s); |
460b9539 | 293 | } |
294 | ||
295 | /* Volume mapping. We consider left, right, volume to be in [0,1] | |
296 | * and balance to be in [-1,1]. | |
297 | * | |
298 | * First, we just have volume = max(left, right). | |
299 | * | |
300 | * Balance we consider to linearly represent the amount by which the quieter | |
301 | * channel differs from the louder. In detail: | |
302 | * | |
303 | * if right > left then balance > 0: | |
304 | * balance = 0 => left = right (as an endpoint, not an instance) | |
305 | * balance = 1 => left = 0 | |
306 | * fitting to linear, left = right * (1 - balance) | |
307 | * so balance = 1 - left / right | |
308 | * (right > left => right > 0 so no division by 0.) | |
309 | * | |
310 | * if left > right then balance < 0: | |
311 | * balance = 0 => right = left (same caveat as above) | |
312 | * balance = -1 => right = 0 | |
313 | * again fitting to linear, right = left * (1 + balance) | |
314 | * so balance = right / left - 1 | |
315 | * (left > right => left > 0 so no division by 0.) | |
316 | * | |
317 | * if left = right then we just have balance = 0. | |
318 | * | |
319 | * Thanks to Clive and Andrew. | |
320 | */ | |
321 | ||
322 | static double max(double x, double y) { | |
323 | return x > y ? x : y; | |
324 | } | |
325 | ||
326 | static double left(double v, double b) { | |
327 | if(b > 0) /* volume = right */ | |
328 | return v * (1 - b); | |
329 | else /* volume = left */ | |
330 | return v; | |
331 | } | |
332 | ||
333 | static double right(double v, double b) { | |
334 | if(b > 0) /* volume = right */ | |
335 | return v; | |
336 | else /* volume = left */ | |
337 | return v * (1 + b); | |
338 | } | |
339 | ||
340 | static double volume(double l, double r) { | |
341 | return max(l, r); | |
342 | } | |
343 | ||
344 | static double balance(double l, double r) { | |
345 | if(l > r) | |
346 | return r / l - 1; | |
347 | else if(r > l) | |
348 | return 1 - l / r; | |
349 | else /* left = right */ | |
350 | return 0; | |
351 | } | |
352 | ||
353 | /* | |
354 | Local Variables: | |
355 | c-basic-offset:2 | |
356 | comment-column:40 | |
357 | fill-column:79 | |
358 | indent-tabs-mode:nil | |
359 | End: | |
360 | */ |