git.maemo.org Git - monky/blob - src/mpd.c

   1 /* Conky, a system monitor, based on torsmo
   2  *
   3  * Any original torsmo code is licensed under the BSD license
   4  *
   5  * All code written since the fork of torsmo is licensed under the GPL
   6  *
   7  * Please see COPYING for details
   8  *
   9  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  10  *      (see AUTHORS)
  11  * All rights reserved.
  12  *
  13  * This program is free software: you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation, either version 3 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24  *
  25  * vim: ts=4 sw=4 noet ai cindent syntax=c
  26  *
  27  */
  28
  29 #include "conky.h"
  30 #include "logging.h"
  31 #include "timed_thread.h"
  32 #include "libmpdclient.h"
  33 #include "mpd.h"
  34
  35 /* server connection data */
  36 static char mpd_host[128];
  37 static char mpd_password[128];
  38 static int mpd_port;
  39
  40 /* this is >0 if the current password was set from MPD_HOST */
  41 static int mpd_environment_password = 0;
  42
  43 /* global mpd information */
  44 static struct mpd_s mpd_info;
  45
  46 /* number of users of the above struct */
  47 static int refcount = 0;
  48
  49 void mpd_set_host(const char *host)
  50 {
  51         snprintf(mpd_host, 128, "%s", host);
  52
  53         if (mpd_environment_password) {
  54                 /* for security, dont use environment password when user specifies host in config */
  55                 mpd_clear_password();
  56         }
  57 }
  58 void mpd_set_password(const char *password, int from_environment)
  59 {
  60         snprintf(mpd_password, 128, "%s", password);
  61         mpd_environment_password = from_environment;
  62 }
  63 void mpd_clear_password(void)
  64 {
  65         *mpd_password = '\0';
  66         mpd_environment_password = 0;
  67 }
  68 int mpd_set_port(const char *port)
  69 {
  70         int val;
  71
  72         val = strtol(port, 0, 0);
  73         if (val < 1 || val > 0xffff)
  74                 return 1;
  75         mpd_port = val;
  76         return 0;
  77 }
  78
  79 void init_mpd(void)
  80 {
  81         if (!(refcount++))      /* first client */
  82                 memset(&mpd_info, 0, sizeof(struct mpd_s));
  83
  84         refcount++;
  85 }
  86
  87 struct mpd_s *mpd_get_info(void)
  88 {
  89         return &mpd_info;
  90 }
  91
  92 static void clear_mpd(void)
  93 {
  94 #define xfree(x) if (x) free(x)
  95         xfree(mpd_info.title);
  96         xfree(mpd_info.artist);
  97         xfree(mpd_info.album);
  98         /* do not free() the const char *status! */
  99         /* do not free() the const char *random! */
 100         /* do not free() the const char *repeat! */
 101         xfree(mpd_info.track);
 102         xfree(mpd_info.name);
 103         xfree(mpd_info.file);
 104 #undef xfree
 105         memset(&mpd_info, 0, sizeof(struct mpd_s));
 106 }
 107
 108 void free_mpd(void)
 109 {
 110         if (!(--refcount))      /* last client */
 111                 clear_mpd();
 112 }
 113
 114 static void *update_mpd_thread(void *) __attribute__((noreturn));
 115
 116 void update_mpd(void)
 117 {
 118         int interval;
 119         static timed_thread *thread = NULL;
 120
 121         if (thread)
 122                 return;
 123
 124         interval = info.music_player_interval * 1000000;
 125         thread = timed_thread_create(&update_mpd_thread, &thread, interval);
 126         if (!thread) {
 127                 ERR("Failed to create MPD timed thread");
 128                 return;
 129         }
 130         timed_thread_register(thread, &thread);
 131         if (timed_thread_run(thread))
 132                 ERR("Failed to run MPD timed thread");
 133 }
 134
 135 /* stringMAXdup dups at most text_buffer_size bytes */
 136 #define strmdup(x) strndup(x, text_buffer_size - 1)
 137
 138 static void *update_mpd_thread(void *arg)
 139 {
 140         static mpd_Connection *conn = NULL;
 141         mpd_Status *status;
 142         mpd_InfoEntity *entity;
 143         timed_thread *me = *(timed_thread **)arg;
 144         const char *emptystr = "";
 145
 146         while (1) {
 147                 if (!conn)
 148                         conn = mpd_newConnection(mpd_host, mpd_port, 10);
 149
 150                 if (*mpd_password) {
 151                         mpd_sendPasswordCommand(conn, mpd_password);
 152                         mpd_finishCommand(conn);
 153                 }
 154
 155                 timed_thread_lock(me);
 156
 157                 if (conn->error || conn == NULL) {
 158                         ERR("MPD error: %s\n", conn->errorStr);
 159                         mpd_closeConnection(conn);
 160                         conn = 0;
 161                         clear_mpd();
 162
 163                         mpd_info.status = "MPD not responding";
 164                         timed_thread_unlock(me);
 165                         if (timed_thread_test(me, 0)) {
 166                                 timed_thread_exit(me);
 167                         }
 168                         continue;
 169                 }
 170
 171                 mpd_sendStatusCommand(conn);
 172                 if ((status = mpd_getStatus(conn)) == NULL) {
 173                         ERR("MPD error: %s\n", conn->errorStr);
 174                         mpd_closeConnection(conn);
 175                         conn = 0;
 176                         clear_mpd();
 177
 178                         mpd_info.status = "MPD not responding";
 179                         timed_thread_unlock(me);
 180                         if (timed_thread_test(me, 0)) {
 181                                 timed_thread_exit(me);
 182                         }
 183                         continue;
 184                 }
 185                 mpd_finishCommand(conn);
 186                 if (conn->error) {
 187                         // fprintf(stderr, "%s\n", conn->errorStr);
 188                         mpd_closeConnection(conn);
 189                         conn = 0;
 190                         timed_thread_unlock(me);
 191                         if (timed_thread_test(me, 0)) {
 192                                 timed_thread_exit(me);
 193                         }
 194                         continue;
 195                 }
 196
 197                 mpd_info.volume = status->volume;
 198                 /* if (status->error) {
 199                         printf("error: %s\n", status->error);
 200                 } */
 201
 202                 switch (status->state) {
 203                         case MPD_STATUS_STATE_PLAY:
 204                                 mpd_info.status = "Playing";
 205                                 break;
 206                         case MPD_STATUS_STATE_STOP:
 207                                 mpd_info.status = "Stopped";
 208                                 break;
 209                         case MPD_STATUS_STATE_PAUSE:
 210                                 mpd_info.status = "Paused";
 211                                 break;
 212                         default:
 213                                 mpd_info.status = "";
 214                                 clear_mpd();
 215                                 break;
 216                 }
 217
 218                 if (status->state == MPD_STATUS_STATE_STOP) {
 219                         mpd_info.progress = (float) status->elapsedTime /
 220                                 status->totalTime;
 221                         mpd_info.elapsed = status->elapsedTime;
 222                 } else if (status->state == MPD_STATUS_STATE_PLAY ||
 223                     status->state == MPD_STATUS_STATE_PAUSE) {
 224                         mpd_info.is_playing = 1;
 225                         mpd_info.bitrate = status->bitRate;
 226                         mpd_info.progress = (float) status->elapsedTime /
 227                                 status->totalTime;
 228                         mpd_info.elapsed = status->elapsedTime;
 229                         mpd_info.length = status->totalTime;
 230                         if (status->random == 0) {
 231                                 mpd_info.random = "Off";
 232                         } else if (status->random == 1) {
 233                                 mpd_info.random = "On";
 234                         } else {
 235                                 mpd_info.random = "";
 236                         }
 237                         if (status->repeat == 0) {
 238                                 mpd_info.repeat = "Off";
 239                         } else if (status->repeat == 1) {
 240                                 mpd_info.repeat = "On";
 241                         } else {
 242                                 mpd_info.repeat = "";
 243                         }
 244                 } else {
 245                         mpd_info.is_playing = 0;
 246                 }
 247
 248                 if (conn->error) {
 249                         // fprintf(stderr, "%s\n", conn->errorStr);
 250                         mpd_closeConnection(conn);
 251                         conn = 0;
 252                         timed_thread_unlock(me);
 253                         if (timed_thread_test(me, 0)) {
 254                                 timed_thread_exit(me);
 255                         }
 256                         continue;
 257                 }
 258
 259                 mpd_sendCurrentSongCommand(conn);
 260                 while ((entity = mpd_getNextInfoEntity(conn))) {
 261                         mpd_Song *song = entity->info.song;
 262
 263                         if (entity->type != MPD_INFO_ENTITY_TYPE_SONG) {
 264                                 mpd_freeInfoEntity(entity);
 265                                 continue;
 266                         }
 267 #define SONGSET(x) {                            \
 268         free(mpd_info.x);                       \
 269         if(song->x)                             \
 270                 mpd_info.x = strmdup(song->x);  \
 271         else                                    \
 272                 mpd_info.x = strmdup(emptystr); \
 273 }
 274                         SONGSET(artist);
 275                         SONGSET(album);
 276                         SONGSET(title);
 277                         SONGSET(track);
 278                         SONGSET(name);
 279                         SONGSET(file);
 280 #undef SONGSET
 281                         if (entity != NULL) {
 282                                 mpd_freeInfoEntity(entity);
 283                                 entity = NULL;
 284                         }
 285                 }
 286                 mpd_finishCommand(conn);
 287                 if (conn->error) {
 288                         // fprintf(stderr, "%s\n", conn->errorStr);
 289                         mpd_closeConnection(conn);
 290                         conn = 0;
 291                         timed_thread_unlock(me);
 292                         if (timed_thread_test(me, 0)) {
 293                                 timed_thread_exit(me);
 294                         }
 295                         continue;
 296                 }
 297
 298                 timed_thread_unlock(me);
 299                 if (conn->error) {
 300                         // fprintf(stderr, "%s\n", conn->errorStr);
 301                         mpd_closeConnection(conn);
 302                         conn = 0;
 303                         if (timed_thread_test(me, 0)) {
 304                                 timed_thread_exit(me);
 305                         }
 306                         continue;
 307                 }
 308
 309                 mpd_freeStatus(status);
 310                 /* if (conn) {
 311                         mpd_closeConnection(conn);
 312                         conn = 0;
 313                 } */
 314                 if (timed_thread_test(me, 0)) {
 315                         timed_thread_exit(me);
 316                 }
 317                 continue;
 318         }
 319         /* never reached */
 320 }
 321