mdw@git.distorted.org.uk Git - disorder/blob - 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 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 /** @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  */
  27
  28 #include "disobedience.h"
  29
  30 /* State monitoring -------------------------------------------------------- */
  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 static void log_rescanned(void *v);
  45 static void log_rights_changed(void *v, rights_type r);
  46
  47 /** @brief Callbacks for server state monitoring */
  48 const disorder_eclient_log_callbacks log_callbacks = {
  49   .connected = log_connected,
  50   .completed = log_completed,
  51   .failed = log_failed,
  52   .moved = log_moved,
  53   .playing = log_playing,
  54   .queue = log_queue,
  55   .recent_added = log_recent_added,
  56   .recent_removed = log_recent_removed,
  57   .removed = log_removed,
  58   .scratched = log_scratched,
  59   .state = log_state,
  60   .volume = log_volume,
  61   .rescanned = log_rescanned,
  62   .rights_changed = log_rights_changed
  63 };
  64
  65 /** @brief Update everything */
  66 void all_update(void) {
  67   ++suppress_actions;
  68   event_raise("queue-changed", 0);
  69   event_raise("recent-changed", 0);
  70   event_raise("volume-changed", 0);
  71   event_raise("rescan-complete", 0);
  72   --suppress_actions;
  73 }
  74
  75 /** @brief Called when the client connects
  76  *
  77  * Depending on server and network state the TCP connection to the server may
  78  * go up or down many times during the lifetime of Disobedience.  This function
  79  * is called whenever it connects.
  80  */
  81 static void log_connected(void attribute((unused)) *v) {
  82   /* Don't know what we might have missed while disconnected so update
  83    * everything.  We get this at startup too and this is how we do the initial
  84    * state fetch. */
  85   all_update();
  86   event_raise("log-connected", 0);
  87 }
  88
  89 /** @brief Called when the current track finishes playing */
  90 static void log_completed(void attribute((unused)) *v,
  91                           const char attribute((unused)) *track) {
  92 }
  93
  94 /** @brief Called when the current track fails */
  95 static void log_failed(void attribute((unused)) *v,
  96                        const char attribute((unused)) *track,
  97                        const char attribute((unused)) *status) {
  98 }
  99
 100 /** @brief Called when some track is moved within the queue */
 101 static void log_moved(void attribute((unused)) *v,
 102                       const char attribute((unused)) *user) {
 103   event_raise("queue-changed", 0);
 104 }
 105
 106 static void log_playing(void attribute((unused)) *v,
 107                         const char attribute((unused)) *track,
 108                         const char attribute((unused)) *user) {
 109 }
 110
 111 /** @brief Called when a track is added to the queue */
 112 static void log_queue(void attribute((unused)) *v,
 113                       struct queue_entry attribute((unused)) *q) {
 114   event_raise("queue-changed", 0);
 115 }
 116
 117 /** @brief Called when a track is added to the recently-played list */
 118 static void log_recent_added(void attribute((unused)) *v,
 119                              struct queue_entry attribute((unused)) *q) {
 120   event_raise("recent-changed", 0);
 121 }
 122
 123 /** @brief Called when a track is removed from the recently-played list
 124  *
 125  * We do nothing here - log_recent_added() suffices.
 126  */
 127 static void log_recent_removed(void attribute((unused)) *v,
 128                                const char attribute((unused)) *id) {
 129   /* nothing - log_recent_added() will trigger the relevant update */
 130 }
 131
 132 /** @brief Called when a track is removed from the queue */
 133 static void log_removed(void attribute((unused)) *v,
 134                         const char attribute((unused)) *id,
 135                         const char attribute((unused)) *user) {
 136   event_raise("queue-changed", 0);
 137 }
 138
 139 /** @brief Called when the current track is scratched */
 140 static void log_scratched(void attribute((unused)) *v,
 141                           const char attribute((unused)) *track,
 142                           const char attribute((unused)) *user) {
 143 }
 144
 145 /** @brief Map from state bits to state change events */
 146 static const struct {
 147   unsigned long bit;
 148   const char *event;
 149 } state_events[] = {
 150   { DISORDER_PLAYING_ENABLED, "enabled-changed" },
 151   { DISORDER_RANDOM_ENABLED, "random-changed" },
 152   { DISORDER_TRACK_PAUSED, "pause-changed" },
 153   { DISORDER_PLAYING, "playing-changed" },
 154 };
 155 #define NSTATE_EVENTS (sizeof state_events / sizeof *state_events)
 156
 157 /** @brief Called when a state change occurs */
 158 static void log_state(void attribute((unused)) *v,
 159                       unsigned long state) {
 160   unsigned long changes = state ^ last_state;
 161   static int first = 1;
 162
 163   ++suppress_actions;
 164   if(first) {
 165     changes = -1UL;
 166     first = 0;
 167   }
 168   D(("log_state old=%s new=%s changed=%s",
 169      disorder_eclient_interpret_state(last_state),
 170      disorder_eclient_interpret_state(state),
 171      disorder_eclient_interpret_state(changes)));
 172   last_state = state;
 173   /* Notify interested parties what has changed */
 174   for(unsigned n = 0; n < NSTATE_EVENTS; ++n)
 175     if(changes & state_events[n].bit)
 176       event_raise(state_events[n].event, 0);
 177   --suppress_actions;
 178 }
 179
 180 /** @brief Called when volume changes */
 181 static void log_volume(void attribute((unused)) *v,
 182                        int l, int r) {
 183   if(!rtp_supported && (volume_l != l || volume_r != r)) {
 184     volume_l = l;
 185     volume_r = r;
 186     ++suppress_actions;
 187     event_raise("volume-changed", 0);
 188     --suppress_actions;
 189   }
 190 }
 191
 192 /** @brief Called when a rescan completes */
 193 static void log_rescanned(void attribute((unused)) *v) {
 194   event_raise("rescan-complete", 0);
 195 }
 196
 197 /** @brief Called when our rights change */
 198 static void log_rights_changed(void attribute((unused)) *v,
 199                                rights_type new_rights) {
 200   ++suppress_actions;
 201   last_rights = new_rights;
 202   event_raise("rights-changed", 0);
 203   --suppress_actions;
 204 }
 205
 206 /*
 207 Local Variables:
 208 c-basic-offset:2
 209 comment-column:40
 210 fill-column:79
 211 indent-tabs-mode:nil
 212 End:
 213 */