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

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  *
   3  * Conky, a system monitor, based on torsmo
   4  *
   5  * Any original torsmo code is licensed under the BSD license
   6  *
   7  * All code written since the fork of torsmo is licensed under the GPL
   8  *
   9  * Please see COPYING for details
  10  *
  11  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  12  *      (see AUTHORS)
  13  * All rights reserved.
  14  *
  15  * This program is free software: you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation, either version 3 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26  *
  27  * vim: ts=4 sw=4 noet ai cindent syntax=c
  28  *
  29  */
  30
  31 #include "conky.h"
  32 #include "logging.h"
  33 #include "timed_thread.h"
  34 #include "libmpdclient.h"
  35 #include "mpd.h"
  36
  37 /* server connection data */
  38 static char mpd_host[128];
  39 static char mpd_password[128];
  40 static int mpd_port;
  41
  42 /* this is >0 if the current password was set from MPD_HOST */
  43 static int mpd_environment_password = 0;
  44
  45 /* global mpd information */
  46 static struct mpd_s mpd_info;
  47
  48 /* number of users of the above struct */
  49 static int refcount = 0;
  50
  51 void mpd_set_host(const char *host)
  52 {
  53         snprintf(mpd_host, 128, "%s", host);
  54
  55         if (mpd_environment_password) {
  56                 /* for security, dont use environment password when user specifies host in config */
  57                 mpd_clear_password();
  58         }
  59 }
  60 void mpd_set_password(const char *password, int from_environment)
  61 {
  62         snprintf(mpd_password, 128, "%s", password);
  63         mpd_environment_password = from_environment;
  64 }
  65 void mpd_clear_password(void)
  66 {
  67         *mpd_password = '\0';
  68         mpd_environment_password = 0;
  69 }
  70 int mpd_set_port(const char *port)
  71 {
  72         int val;
  73
  74         val = strtol(port, 0, 0);
  75         if (val < 1 || val > 0xffff)
  76                 return 1;
  77         mpd_port = val;
  78         return 0;
  79 }
  80
  81 void init_mpd(void)
  82 {
  83         if (!(refcount++))      /* first client */
  84                 memset(&mpd_info, 0, sizeof(struct mpd_s));
  85
  86         refcount++;
  87 }
  88
  89 struct mpd_s *mpd_get_info(void)
  90 {
  91         return &mpd_info;
  92 }
  93
  94 static void clear_mpd(void)
  95 {
  96 #define xfree(x) if (x) free(x)
  97         xfree(mpd_info.title);
  98         xfree(mpd_info.artist);
  99         xfree(mpd_info.album);
 100         /* do not free() the const char *status! */
 101         /* do not free() the const char *random! */
 102         /* do not free() the const char *repeat! */
 103         xfree(mpd_info.track);
 104         xfree(mpd_info.name);
 105         xfree(mpd_info.file);
 106 #undef xfree
 107         memset(&mpd_info, 0, sizeof(struct mpd_s));
 108 }
 109
 110 void free_mpd(void)
 111 {
 112         if (!(--refcount))      /* last client */
 113                 clear_mpd();
 114 }
 115
 116 static void *update_mpd_thread(void *) __attribute__((noreturn));
 117
 118 void update_mpd(void)
 119 {
 120         int interval;
 121         static timed_thread *thread = NULL;
 122
 123         if (thread)
 124                 return;
 125
 126         interval = info.music_player_interval * 1000000;
 127         thread = timed_thread_create(&update_mpd_thread, &thread, interval);
 128         if (!thread) {
 129                 ERR("Failed to create MPD timed thread");
 130                 return;
 131         }
 132         timed_thread_register(thread, &thread);
 133         if (timed_thread_run(thread))
 134                 ERR("Failed to run MPD timed thread");
 135 }
 136
 137 /* stringMAXdup dups at most text_buffer_size bytes */
 138 #define strmdup(x) strndup(x, text_buffer_size - 1)
 139
 140 static void *update_mpd_thread(void *arg)
 141 {
 142         static mpd_Connection *conn = NULL;
 143         mpd_Status *status;
 144         mpd_InfoEntity *entity;
 145         timed_thread *me = *(timed_thread **)arg;
 146         const char *emptystr = "";
 147
 148         while (1) {
 149                 if (!conn)
 150                         conn = mpd_newConnection(mpd_host, mpd_port, 10);
 151
 152                 if (*mpd_password) {
 153                         mpd_sendPasswordCommand(conn, mpd_password);
 154                         mpd_finishCommand(conn);
 155                 }
 156
 157                 timed_thread_lock(me);
 158
 159                 if (conn->error || conn == NULL) {
 160                         ERR("MPD error: %s\n", conn->errorStr);
 161                         mpd_closeConnection(conn);
 162                         conn = 0;
 163                         clear_mpd();
 164
 165                         mpd_info.status = "MPD not responding";
 166                         timed_thread_unlock(me);
 167                         if (timed_thread_test(me, 0)) {
 168                                 timed_thread_exit(me);
 169                         }
 170                         continue;
 171                 }
 172
 173                 mpd_sendStatusCommand(conn);
 174                 if ((status = mpd_getStatus(conn)) == NULL) {
 175                         ERR("MPD error: %s\n", conn->errorStr);
 176                         mpd_closeConnection(conn);
 177                         conn = 0;
 178                         clear_mpd();
 179
 180                         mpd_info.status = "MPD not responding";
 181                         timed_thread_unlock(me);
 182                         if (timed_thread_test(me, 0)) {
 183                                 timed_thread_exit(me);
 184                         }
 185                         continue;
 186                 }
 187                 mpd_finishCommand(conn);
 188                 if (conn->error) {
 189                         // fprintf(stderr, "%s\n", conn->errorStr);
 190                         mpd_closeConnection(conn);
 191                         conn = 0;
 192                         timed_thread_unlock(me);
 193                         if (timed_thread_test(me, 0)) {
 194                                 timed_thread_exit(me);
 195                         }
 196                         continue;
 197                 }
 198
 199                 mpd_info.volume = status->volume;
 200                 /* if (status->error) {
 201                         printf("error: %s\n", status->error);
 202                 } */
 203
 204                 switch (status->state) {
 205                         case MPD_STATUS_STATE_PLAY:
 206                                 mpd_info.status = "Playing";
 207                                 break;
 208                         case MPD_STATUS_STATE_STOP:
 209                                 mpd_info.status = "Stopped";
 210                                 break;
 211                         case MPD_STATUS_STATE_PAUSE:
 212                                 mpd_info.status = "Paused";
 213                                 break;
 214                         default:
 215                                 mpd_info.status = "";
 216                                 clear_mpd();
 217                                 break;
 218                 }
 219
 220                 if (status->state == MPD_STATUS_STATE_STOP) {
 221                         mpd_info.progress = (float) status->elapsedTime /
 222                                 status->totalTime;
 223                         mpd_info.elapsed = status->elapsedTime;
 224                 } else if (status->state == MPD_STATUS_STATE_PLAY ||
 225                     status->state == MPD_STATUS_STATE_PAUSE) {
 226                         mpd_info.is_playing = 1;
 227                         mpd_info.bitrate = status->bitRate;
 228                         mpd_info.progress = (float) status->elapsedTime /
 229                                 status->totalTime;
 230                         mpd_info.elapsed = status->elapsedTime;
 231                         mpd_info.length = status->totalTime;
 232                         if (status->random == 0) {
 233                                 mpd_info.random = "Off";
 234                         } else if (status->random == 1) {
 235                                 mpd_info.random = "On";
 236                         } else {
 237                                 mpd_info.random = "";
 238                         }
 239                         if (status->repeat == 0) {
 240                                 mpd_info.repeat = "Off";
 241                         } else if (status->repeat == 1) {
 242                                 mpd_info.repeat = "On";
 243                         } else {
 244                                 mpd_info.repeat = "";
 245                         }
 246                 } else {
 247                         mpd_info.is_playing = 0;
 248                 }
 249
 250                 if (conn->error) {
 251                         // fprintf(stderr, "%s\n", conn->errorStr);
 252                         mpd_closeConnection(conn);
 253                         conn = 0;
 254                         timed_thread_unlock(me);
 255                         if (timed_thread_test(me, 0)) {
 256                                 timed_thread_exit(me);
 257                         }
 258                         continue;
 259                 }
 260
 261                 mpd_sendCurrentSongCommand(conn);
 262                 while ((entity = mpd_getNextInfoEntity(conn))) {
 263                         mpd_Song *song = entity->info.song;
 264
 265                         if (entity->type != MPD_INFO_ENTITY_TYPE_SONG) {
 266                                 mpd_freeInfoEntity(entity);
 267                                 continue;
 268                         }
 269 #define SONGSET(x) {                            \
 270         free(mpd_info.x);                       \
 271         if(song->x)                             \
 272                 mpd_info.x = strmdup(song->x);  \
 273         else                                    \
 274                 mpd_info.x = strmdup(emptystr); \
 275 }
 276                         SONGSET(artist);
 277                         SONGSET(album);
 278                         SONGSET(title);
 279                         SONGSET(track);
 280                         SONGSET(name);
 281                         SONGSET(file);
 282 #undef SONGSET
 283                         if (entity != NULL) {
 284                                 mpd_freeInfoEntity(entity);
 285                                 entity = NULL;
 286                         }
 287                 }
 288                 mpd_finishCommand(conn);
 289                 if (conn->error) {
 290                         // fprintf(stderr, "%s\n", conn->errorStr);
 291                         mpd_closeConnection(conn);
 292                         conn = 0;
 293                         timed_thread_unlock(me);
 294                         if (timed_thread_test(me, 0)) {
 295                                 timed_thread_exit(me);
 296                         }
 297                         continue;
 298                 }
 299
 300                 timed_thread_unlock(me);
 301                 if (conn->error) {
 302                         // fprintf(stderr, "%s\n", conn->errorStr);
 303                         mpd_closeConnection(conn);
 304                         conn = 0;
 305                         if (timed_thread_test(me, 0)) {
 306                                 timed_thread_exit(me);
 307                         }
 308                         continue;
 309                 }
 310
 311                 mpd_freeStatus(status);
 312                 /* if (conn) {
 313                         mpd_closeConnection(conn);
 314                         conn = 0;
 315                 } */
 316                 if (timed_thread_test(me, 0)) {
 317                         timed_thread_exit(me);
 318                 }
 319                 continue;
 320         }
 321         /* never reached */
 322 }
 323