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
  46 /** @brief Callbacks for server state monitoring */
  47 const disorder_eclient_log_callbacks log_callbacks = {
  48   log_connected,
  49   log_completed,
  50   log_failed,
  51   log_moved,
  52   log_playing,
  53   log_queue,
  54   log_recent_added,
  55   log_recent_removed,
  56   log_removed,
  57   log_scratched,
  58   log_state,
  59   log_volume,
  60   log_rescanned
  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 };
 153 #define NSTATE_EVENTS (sizeof state_events / sizeof *state_events)
 154
 155 /** @brief Called when a state change occurs */
 156 static void log_state(void attribute((unused)) *v,
 157                       unsigned long state) {
 158   unsigned long changes = state ^ last_state;
 159   static int first = 1;
 160
 161   ++suppress_actions;
 162   if(first) {
 163     changes = -1UL;
 164     first = 0;
 165   }
 166   D(("log_state old=%s new=%s changed=%s",
 167      disorder_eclient_interpret_state(last_state),
 168      disorder_eclient_interpret_state(state),
 169      disorder_eclient_interpret_state(changes)));
 170   last_state = state;
 171   /* Notify interested parties what has changed */
 172   for(unsigned n = 0; n < NSTATE_EVENTS; ++n)
 173     if(changes & state_events[n].bit)
 174       event_raise(state_events[n].event, 0);
 175   --suppress_actions;
 176 }
 177
 178 /** @brief Called when volume changes */
 179 static void log_volume(void attribute((unused)) *v,
 180                        int l, int r) {
 181   if(!rtp_supported && (volume_l != l || volume_r != r)) {
 182     volume_l = l;
 183     volume_r = r;
 184     ++suppress_actions;
 185     event_raise("volume-changed", 0);
 186     --suppress_actions;
 187   }
 188 }
 189
 190 /** @brief Called when a rescan completes */
 191 static void log_rescanned(void attribute((unused)) *v) {
 192   event_raise("rescan-complete", 0);
 193 }
 194
 195 /*
 196 Local Variables:
 197 c-basic-offset:2
 198 comment-column:40
 199 fill-column:79
 200 indent-tabs-mode:nil
 201 End:
 202 */