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