chiark / gitweb /
Add 'adopt' command. This adopts a randomly picked track by changing
[disorder] / disobedience / log.c
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 3 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,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU 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, see <http://www.gnu.org/licenses/>.
17  */
18 /** @file disobedience/log.c
19  * @brief State monitoring
20  *
21  * Disobedience relies on the server to tell when essentially anything changes,
22  * even if it initiated the change itself.  It uses the @c log command to
23  * achieve this.
24  */
25
26 #include "disobedience.h"
27
28 /* State monitoring -------------------------------------------------------- */
29
30 static void log_connected(void *v);
31 static void log_completed(void *v, const char *track);
32 static void log_failed(void *v, const char *track, const char *status);
33 static void log_moved(void *v, const char *user);
34 static void log_playing(void *v, const char *track, const char *user);
35 static void log_queue(void *v, struct queue_entry *q);
36 static void log_recent_added(void *v, struct queue_entry *q);
37 static void log_recent_removed(void *v, const char *id);
38 static void log_removed(void *v, const char *id, const char *user);
39 static void log_scratched(void *v, const char *track, const char *user);
40 static void log_state(void *v, unsigned long state);
41 static void log_volume(void *v, int l, int r);
42 static void log_rescanned(void *v);
43 static void log_rights_changed(void *v, rights_type r);
44
45 /** @brief Callbacks for server state monitoring */
46 const disorder_eclient_log_callbacks log_callbacks = {
47   .connected = log_connected,
48   .completed = log_completed,
49   .failed = log_failed,
50   .moved = log_moved,
51   .playing = log_playing,
52   .queue = log_queue,
53   .recent_added = log_recent_added,
54   .recent_removed = log_recent_removed,
55   .removed = log_removed,
56   .scratched = log_scratched,
57   .state = log_state,
58   .volume = log_volume,
59   .rescanned = log_rescanned,
60   .rights_changed = log_rights_changed
61 };
62
63 /** @brief Update everything */
64 void all_update(void) {
65   ++suppress_actions;
66   event_raise("queue-changed", 0);
67   event_raise("recent-changed", 0);
68   event_raise("volume-changed", 0);
69   event_raise("rescan-complete", 0);
70   --suppress_actions;
71 }
72
73 /** @brief Called when the client connects
74  *
75  * Depending on server and network state the TCP connection to the server may
76  * go up or down many times during the lifetime of Disobedience.  This function
77  * is called whenever it connects.
78  */
79 static void log_connected(void attribute((unused)) *v) {
80   /* Don't know what we might have missed while disconnected so update
81    * everything.  We get this at startup too and this is how we do the initial
82    * state fetch. */
83   all_update();
84   event_raise("log-connected", 0);
85 }
86
87 /** @brief Called when the current track finishes playing */
88 static void log_completed(void attribute((unused)) *v,
89                           const char attribute((unused)) *track) {
90 }
91
92 /** @brief Called when the current track fails */
93 static void log_failed(void attribute((unused)) *v,
94                        const char attribute((unused)) *track,
95                        const char attribute((unused)) *status) {
96 }
97
98 /** @brief Called when some track is moved within the queue */
99 static void log_moved(void attribute((unused)) *v,
100                       const char attribute((unused)) *user) {
101   event_raise("queue-changed", 0);
102 }
103
104 static void log_playing(void attribute((unused)) *v,
105                         const char attribute((unused)) *track,
106                         const char attribute((unused)) *user) {
107 }
108
109 /** @brief Called when a track is added to the queue */
110 static void log_queue(void attribute((unused)) *v,
111                       struct queue_entry attribute((unused)) *q) {
112   event_raise("queue-changed", 0);
113 }
114
115 /** @brief Called when a track is added to the recently-played list */
116 static void log_recent_added(void attribute((unused)) *v,
117                              struct queue_entry attribute((unused)) *q) {
118   event_raise("recent-changed", 0);
119 }
120
121 /** @brief Called when a track is removed from the recently-played list
122  *
123  * We do nothing here - log_recent_added() suffices.
124  */
125 static void log_recent_removed(void attribute((unused)) *v,
126                                const char attribute((unused)) *id) {
127   /* nothing - log_recent_added() will trigger the relevant update */
128 }
129
130 /** @brief Called when a track is removed from the queue */
131 static void log_removed(void attribute((unused)) *v,
132                         const char attribute((unused)) *id,
133                         const char attribute((unused)) *user) {
134   event_raise("queue-changed", 0);
135 }
136
137 /** @brief Called when the current track is scratched */
138 static void log_scratched(void attribute((unused)) *v,
139                           const char attribute((unused)) *track,
140                           const char attribute((unused)) *user) {
141 }
142
143 /** @brief Map from state bits to state change events */
144 static const struct {
145   unsigned long bit;
146   const char *event;
147 } state_events[] = {
148   { DISORDER_PLAYING_ENABLED, "enabled-changed" },
149   { DISORDER_RANDOM_ENABLED, "random-changed" },
150   { DISORDER_TRACK_PAUSED, "pause-changed" },
151   { DISORDER_PLAYING, "playing-changed" },
152   { DISORDER_CONNECTED, "connected-changed" },
153 };
154 #define NSTATE_EVENTS (sizeof state_events / sizeof *state_events)
155
156 /** @brief Called when a state change occurs */
157 static void log_state(void attribute((unused)) *v,
158                       unsigned long state) {
159   unsigned long changes = state ^ last_state;
160   static int first = 1;
161
162   ++suppress_actions;
163   if(first) {
164     changes = -1UL;
165     first = 0;
166   }
167   D(("log_state old=%s new=%s changed=%s",
168      disorder_eclient_interpret_state(last_state),
169      disorder_eclient_interpret_state(state),
170      disorder_eclient_interpret_state(changes)));
171   last_state = state;
172   /* Notify interested parties what has changed */
173   for(unsigned n = 0; n < NSTATE_EVENTS; ++n)
174     if(changes & state_events[n].bit)
175       event_raise(state_events[n].event, 0);
176   --suppress_actions;
177 }
178
179 /** @brief Called when volume changes */
180 static void log_volume(void attribute((unused)) *v,
181                        int l, int r) {
182   if(!rtp_supported && (volume_l != l || volume_r != r)) {
183     volume_l = l;
184     volume_r = r;
185     ++suppress_actions;
186     event_raise("volume-changed", 0);
187     --suppress_actions;
188   }
189 }
190
191 /** @brief Called when a rescan completes */
192 static void log_rescanned(void attribute((unused)) *v) {
193   event_raise("rescan-complete", 0);
194 }
195
196 /** @brief Called when our rights change */
197 static void log_rights_changed(void attribute((unused)) *v,
198                                rights_type new_rights) {
199   ++suppress_actions;
200   last_rights = new_rights;
201   event_raise("rights-changed", 0);
202   --suppress_actions;
203 }
204
205 /*
206 Local Variables:
207 c-basic-offset:2
208 comment-column:40
209 fill-column:79
210 indent-tabs-mode:nil
211 End:
212 */