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

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