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  */
  26
  27 #include "conky.h"
  28 #include "logging.h"
  29 #include "timed_thread.h"
  30 #include "libmpdclient.h"
  31 #include "mpd.h"
  32
  33 /* server connection data */
  34 static char mpd_host[128];
  35 static char mpd_password[128];
  36 static int mpd_port;
  37
  38 /* this is >0 if the current password was set from MPD_HOST */
  39 static int mpd_environment_password = 0;
  40
  41 /* global mpd information */
  42 static struct mpd_s mpd_info;
  43
  44 /* number of users of the above struct */
  45 static int refcount = 0;
  46
  47 void mpd_set_host(const char *host)
  48 {
  49         snprintf(mpd_host, 128, "%s", host);
  50
  51         if (mpd_environment_password) {
  52                 /* for security, dont use environment password when user specifies host in config */
  53                 mpd_clear_password();
  54         }
  55 }
  56 void mpd_set_password(const char *password, int from_environment)
  57 {
  58         snprintf(mpd_password, 128, "%s", password);
  59         mpd_environment_password = from_environment;
  60 }
  61 void mpd_clear_password(void)
  62 {
  63         *mpd_password = '\0';
  64         mpd_environment_password = 0;
  65 }
  66 int mpd_set_port(const char *port)
  67 {
  68         int val;
  69
  70         val = strtol(port, 0, 0);
  71         if (val < 1 || val > 0xffff)
  72                 return 1;
  73         mpd_port = val;
  74         return 0;
  75 }
  76
  77 void init_mpd(void)
  78 {
  79         if (!(refcount++))      /* first client */
  80                 memset(&mpd_info, 0, sizeof(struct mpd_s));
  81
  82         refcount++;
  83 }
  84
  85 struct mpd_s *mpd_get_info(void)
  86 {
  87         return &mpd_info;
  88 }
  89
  90 static void clear_mpd(void)
  91 {
  92 #define xfree(x) if (x) free(x)
  93         xfree(mpd_info.title);
  94         xfree(mpd_info.artist);
  95         xfree(mpd_info.album);
  96         /* do not free() the const char *status! */
  97         /* do not free() the const char *random! */
  98         /* do not free() the const char *repeat! */
  99         xfree(mpd_info.track);
 100         xfree(mpd_info.name);
 101         xfree(mpd_info.file);
 102 #undef xfree
 103         memset(&mpd_info, 0, sizeof(struct mpd_s));
 104 }
 105
 106 void free_mpd(void)
 107 {
 108         if (!(--refcount))      /* last client */
 109                 clear_mpd();
 110 }
 111
 112 static void *update_mpd_thread(void *) __attribute__((noreturn));
 113
 114 void update_mpd(void)
 115 {
 116         int interval;
 117         static timed_thread *thread = NULL;
 118
 119         if (thread)
 120                 return;
 121
 122         interval = info.music_player_interval * 1000000;
 123         thread = timed_thread_create(&update_mpd_thread, &thread, interval);
 124         if (!thread) {
 125                 ERR("Failed to create MPD timed thread");
 126                 return;
 127         }
 128         timed_thread_register(thread, &thread);
 129         if (timed_thread_run(thread))
 130                 ERR("Failed to run MPD timed thread");
 131 }
 132
 133 /* stringMAXdup dups at most text_buffer_size bytes */
 134 #define strmdup(x) strndup(x, text_buffer_size - 1)
 135
 136 static void *update_mpd_thread(void *arg)
 137 {
 138         static mpd_Connection *conn = NULL;
 139         mpd_Status *status;
 140         mpd_InfoEntity *entity;
 141         timed_thread *me = *(timed_thread **)arg;
 142         const char *emptystr = "";
 143
 144         while (1) {
 145                 if (!conn)
 146                         conn = mpd_newConnection(mpd_host, mpd_port, 10);
 147
 148                 if (*mpd_password) {
 149                         mpd_sendPasswordCommand(conn, mpd_password);
 150                         mpd_finishCommand(conn);
 151                 }
 152
 153                 timed_thread_lock(me);
 154
 155                 if (conn->error || conn == NULL) {
 156                         ERR("MPD error: %s\n", conn->errorStr);
 157                         mpd_closeConnection(conn);
 158                         conn = 0;
 159                         clear_mpd();
 160
 161                         mpd_info.status = "MPD not responding";
 162                         timed_thread_unlock(me);
 163                         if (timed_thread_test(me, 0)) {
 164                                 timed_thread_exit(me);
 165                         }
 166                         continue;
 167                 }
 168
 169                 mpd_sendStatusCommand(conn);
 170                 if ((status = mpd_getStatus(conn)) == NULL) {
 171                         ERR("MPD error: %s\n", conn->errorStr);
 172                         mpd_closeConnection(conn);
 173                         conn = 0;
 174                         clear_mpd();
 175
 176                         mpd_info.status = "MPD not responding";
 177                         timed_thread_unlock(me);
 178                         if (timed_thread_test(me, 0)) {
 179                                 timed_thread_exit(me);
 180                         }
 181                         continue;
 182                 }
 183                 mpd_finishCommand(conn);
 184                 if (conn->error) {
 185                         // fprintf(stderr, "%s\n", conn->errorStr);
 186                         mpd_closeConnection(conn);
 187                         conn = 0;
 188                         timed_thread_unlock(me);
 189                         if (timed_thread_test(me, 0)) {
 190                                 timed_thread_exit(me);
 191                         }
 192                         continue;
 193                 }
 194
 195                 mpd_info.volume = status->volume;
 196                 /* if (status->error) {
 197                         printf("error: %s\n", status->error);
 198                 } */
 199
 200                 switch (status->state) {
 201                         case MPD_STATUS_STATE_PLAY:
 202                                 mpd_info.status = "Playing";
 203                                 break;
 204                         case MPD_STATUS_STATE_STOP:
 205                                 mpd_info.status = "Stopped";
 206                                 break;
 207                         case MPD_STATUS_STATE_PAUSE:
 208                                 mpd_info.status = "Paused";
 209                                 break;
 210                         default:
 211                                 mpd_info.status = "";
 212                                 clear_mpd();
 213                                 break;
 214                 }
 215
 216                 if (status->state == MPD_STATUS_STATE_STOP) {
 217                         mpd_info.progress = (float) status->elapsedTime /
 218                                 status->totalTime;
 219                         mpd_info.elapsed = status->elapsedTime;
 220                 } else if (status->state == MPD_STATUS_STATE_PLAY ||
 221                     status->state == MPD_STATUS_STATE_PAUSE) {
 222                         mpd_info.is_playing = 1;
 223                         mpd_info.bitrate = status->bitRate;
 224                         mpd_info.progress = (float) status->elapsedTime /
 225                                 status->totalTime;
 226                         mpd_info.elapsed = status->elapsedTime;
 227                         mpd_info.length = status->totalTime;
 228                         if (status->random == 0) {
 229                                 mpd_info.random = "Off";
 230                         } else if (status->random == 1) {
 231                                 mpd_info.random = "On";
 232                         } else {
 233                                 mpd_info.random = "";
 234                         }
 235                         if (status->repeat == 0) {
 236                                 mpd_info.repeat = "Off";
 237                         } else if (status->repeat == 1) {
 238                                 mpd_info.repeat = "On";
 239                         } else {
 240                                 mpd_info.repeat = "";
 241                         }
 242                 } else {
 243                         mpd_info.is_playing = 0;
 244                 }
 245
 246                 if (conn->error) {
 247                         // fprintf(stderr, "%s\n", conn->errorStr);
 248                         mpd_closeConnection(conn);
 249                         conn = 0;
 250                         timed_thread_unlock(me);
 251                         if (timed_thread_test(me, 0)) {
 252                                 timed_thread_exit(me);
 253                         }
 254                         continue;
 255                 }
 256
 257                 mpd_sendCurrentSongCommand(conn);
 258                 while ((entity = mpd_getNextInfoEntity(conn))) {
 259                         mpd_Song *song = entity->info.song;
 260
 261                         if (entity->type != MPD_INFO_ENTITY_TYPE_SONG) {
 262                                 mpd_freeInfoEntity(entity);
 263                                 continue;
 264                         }
 265 #define SONGSET(x) {                            \
 266         free(mpd_info.x);                       \
 267         if(song->x)                             \
 268                 mpd_info.x = strmdup(song->x);  \
 269         else                                    \
 270                 mpd_info.x = strmdup(emptystr); \
 271 }
 272                         SONGSET(artist);
 273                         SONGSET(album);
 274                         SONGSET(title);
 275                         SONGSET(track);
 276                         SONGSET(name);
 277                         SONGSET(file);
 278 #undef SONGSET
 279                         if (entity != NULL) {
 280                                 mpd_freeInfoEntity(entity);
 281                                 entity = NULL;
 282                         }
 283                 }
 284                 mpd_finishCommand(conn);
 285                 if (conn->error) {
 286                         // fprintf(stderr, "%s\n", conn->errorStr);
 287                         mpd_closeConnection(conn);
 288                         conn = 0;
 289                         timed_thread_unlock(me);
 290                         if (timed_thread_test(me, 0)) {
 291                                 timed_thread_exit(me);
 292                         }
 293                         continue;
 294                 }
 295
 296                 timed_thread_unlock(me);
 297                 if (conn->error) {
 298                         // fprintf(stderr, "%s\n", conn->errorStr);
 299                         mpd_closeConnection(conn);
 300                         conn = 0;
 301                         if (timed_thread_test(me, 0)) {
 302                                 timed_thread_exit(me);
 303                         }
 304                         continue;
 305                 }
 306
 307                 mpd_freeStatus(status);
 308                 /* if (conn) {
 309                         mpd_closeConnection(conn);
 310                         conn = 0;
 311                 } */
 312                 if (timed_thread_test(me, 0)) {
 313                         timed_thread_exit(me);
 314                 }
 315                 continue;
 316         }
 317         /* never reached */
 318 }
 319