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10e226b3 RK |
1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2006, 2007 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 | */ | |
219dc95c RK |
20 | /** @file disobedience/log.c |
21 | * @brief State monitoring | |
22 | * | |
23 | * Disobedience relies on the server to tell when essentially anything changes, | |
24 | * even if it initiated the change itself. It uses the @c log command to | |
25 | * achieve this. | |
26 | */ | |
10e226b3 RK |
27 | |
28 | #include "disobedience.h" | |
29 | ||
186f896b | 30 | /* State monitoring -------------------------------------------------------- */ |
10e226b3 RK |
31 | |
32 | static void log_connected(void *v); | |
33 | static void log_completed(void *v, const char *track); | |
34 | static void log_failed(void *v, const char *track, const char *status); | |
35 | static void log_moved(void *v, const char *user); | |
36 | static void log_playing(void *v, const char *track, const char *user); | |
37 | static void log_queue(void *v, struct queue_entry *q); | |
38 | static void log_recent_added(void *v, struct queue_entry *q); | |
39 | static void log_recent_removed(void *v, const char *id); | |
40 | static void log_removed(void *v, const char *id, const char *user); | |
41 | static void log_scratched(void *v, const char *track, const char *user); | |
42 | static void log_state(void *v, unsigned long state); | |
43 | static void log_volume(void *v, int l, int r); | |
44 | ||
45 | /** @brief Callbacks for server state monitoring */ | |
46 | const disorder_eclient_log_callbacks log_callbacks = { | |
47 | log_connected, | |
48 | log_completed, | |
49 | log_failed, | |
50 | log_moved, | |
51 | log_playing, | |
52 | log_queue, | |
53 | log_recent_added, | |
54 | log_recent_removed, | |
55 | log_removed, | |
56 | log_scratched, | |
57 | log_state, | |
58 | log_volume | |
59 | }; | |
60 | ||
219dc95c RK |
61 | /** @brief State monitor |
62 | * | |
63 | * We keep a linked list of everything that is interested in state changes. | |
64 | */ | |
186f896b | 65 | struct monitor { |
219dc95c | 66 | /** @brief Next monitor */ |
186f896b | 67 | struct monitor *next; |
219dc95c RK |
68 | |
69 | /** @brief State bits of interest */ | |
186f896b | 70 | unsigned long mask; |
219dc95c RK |
71 | |
72 | /** @brief Function to call if any of @c mask change */ | |
186f896b | 73 | monitor_callback *callback; |
219dc95c RK |
74 | |
75 | /** @brief User data for callback */ | |
186f896b RK |
76 | void *u; |
77 | }; | |
78 | ||
219dc95c | 79 | /** @brief List of monitors */ |
186f896b | 80 | static struct monitor *monitors; |
10e226b3 | 81 | |
219dc95c | 82 | /** @brief Update everything */ |
10e226b3 RK |
83 | void all_update(void) { |
84 | playing_update(); | |
85 | queue_update(); | |
86 | recent_update(); | |
6d1302f0 | 87 | volume_update(); |
10e226b3 RK |
88 | } |
89 | ||
219dc95c RK |
90 | /** @brief Called when the client connects |
91 | * | |
92 | * Depending on server and network state the TCP connection to the server may | |
93 | * go up or down many times during the lifetime of Disobedience. This function | |
94 | * is called whenever it connects. | |
95 | * | |
96 | * The intent is to use the monitor logic to achieve this in future. | |
97 | */ | |
10e226b3 | 98 | static void log_connected(void attribute((unused)) *v) { |
10e226b3 RK |
99 | /* Don't know what we might have missed while disconnected so update |
100 | * everything. We get this at startup too and this is how we do the initial | |
101 | * state fetch. */ | |
102 | all_update(); | |
10e226b3 RK |
103 | } |
104 | ||
219dc95c | 105 | /** @brief Called when the current track finishes playing */ |
10e226b3 RK |
106 | static void log_completed(void attribute((unused)) *v, |
107 | const char attribute((unused)) *track) { | |
108 | playing = 0; | |
109 | playing_update(); | |
10e226b3 RK |
110 | } |
111 | ||
219dc95c | 112 | /** @brief Called when the current track fails */ |
10e226b3 RK |
113 | static void log_failed(void attribute((unused)) *v, |
114 | const char attribute((unused)) *track, | |
115 | const char attribute((unused)) *status) { | |
116 | playing = 0; | |
117 | playing_update(); | |
10e226b3 RK |
118 | } |
119 | ||
219dc95c | 120 | /** @brief Called when some track is moved within the queue */ |
10e226b3 RK |
121 | static void log_moved(void attribute((unused)) *v, |
122 | const char attribute((unused)) *user) { | |
219dc95c | 123 | queue_update(); |
10e226b3 RK |
124 | } |
125 | ||
126 | static void log_playing(void attribute((unused)) *v, | |
127 | const char attribute((unused)) *track, | |
128 | const char attribute((unused)) *user) { | |
129 | playing = 1; | |
130 | playing_update(); | |
10e226b3 RK |
131 | /* we get a log_removed() anyway so we don't need to update_queue() from |
132 | * here */ | |
133 | } | |
134 | ||
219dc95c | 135 | /** @brief Called when a track is added to the queue */ |
10e226b3 RK |
136 | static void log_queue(void attribute((unused)) *v, |
137 | struct queue_entry attribute((unused)) *q) { | |
138 | queue_update(); | |
139 | } | |
140 | ||
219dc95c | 141 | /** @brief Called when a track is added to the recently-played list */ |
10e226b3 RK |
142 | static void log_recent_added(void attribute((unused)) *v, |
143 | struct queue_entry attribute((unused)) *q) { | |
144 | recent_update(); | |
145 | } | |
146 | ||
219dc95c RK |
147 | /** @brief Called when a track is removed from the recently-played list |
148 | * | |
149 | * We do nothing here - log_recent_added() suffices. | |
150 | */ | |
10e226b3 RK |
151 | static void log_recent_removed(void attribute((unused)) *v, |
152 | const char attribute((unused)) *id) { | |
153 | /* nothing - log_recent_added() will trigger the relevant update */ | |
154 | } | |
155 | ||
219dc95c | 156 | /** @brief Called when a track is removed from the queue */ |
10e226b3 RK |
157 | static void log_removed(void attribute((unused)) *v, |
158 | const char attribute((unused)) *id, | |
159 | const char attribute((unused)) *user) { | |
160 | queue_update(); | |
161 | } | |
162 | ||
219dc95c | 163 | /** @brief Called when the current track is scratched */ |
10e226b3 RK |
164 | static void log_scratched(void attribute((unused)) *v, |
165 | const char attribute((unused)) *track, | |
166 | const char attribute((unused)) *user) { | |
167 | playing = 0; | |
168 | playing_update(); | |
10e226b3 RK |
169 | } |
170 | ||
219dc95c | 171 | /** @brief Called when a state change occurs */ |
10e226b3 RK |
172 | static void log_state(void attribute((unused)) *v, |
173 | unsigned long state) { | |
186f896b | 174 | const struct monitor *m; |
6d1302f0 RK |
175 | unsigned long changes = state ^ last_state; |
176 | static int first = 1; | |
177 | ||
178 | if(first) { | |
179 | changes = -1UL; | |
180 | first = 0; | |
181 | } | |
182 | D(("log_state old=%s new=%s changed=%s", | |
183 | disorder_eclient_interpret_state(last_state), | |
184 | disorder_eclient_interpret_state(state), | |
185 | disorder_eclient_interpret_state(changes))); | |
00959300 | 186 | last_state = state; |
186f896b RK |
187 | /* Tell anything that cares about the state change */ |
188 | for(m = monitors; m; m = m->next) { | |
00959300 RK |
189 | if(changes & m->mask) |
190 | m->callback(m->u); | |
186f896b | 191 | } |
10e226b3 RK |
192 | /* If the track is paused or resume then the currently playing track is |
193 | * refetched so that we can continue to correctly calculate the played so-far | |
194 | * field */ | |
195 | playing_update(); | |
196 | } | |
197 | ||
219dc95c | 198 | /** @brief Called when volume changes */ |
10e226b3 RK |
199 | static void log_volume(void attribute((unused)) *v, |
200 | int l, int r) { | |
201 | if(volume_l != l || volume_r != r) { | |
202 | volume_l = l; | |
203 | volume_r = r; | |
6d1302f0 | 204 | volume_update(); |
10e226b3 RK |
205 | } |
206 | } | |
207 | ||
219dc95c | 208 | /** @brief Add a monitor to the list */ |
186f896b RK |
209 | void register_monitor(monitor_callback *callback, |
210 | void *u, | |
211 | unsigned long mask) { | |
212 | struct monitor *m = xmalloc(sizeof *m); | |
213 | ||
214 | m->next = monitors; | |
215 | m->mask = mask; | |
216 | m->callback = callback; | |
217 | m->u = u; | |
218 | monitors = m; | |
219 | } | |
220 | ||
10e226b3 RK |
221 | /* |
222 | Local Variables: | |
223 | c-basic-offset:2 | |
224 | comment-column:40 | |
225 | fill-column:79 | |
226 | indent-tabs-mode:nil | |
227 | End: | |
228 | */ |