vcs.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) 2005-2010 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 "timeinfo.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(mpd_info));
  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                 NORM_ERR("Failed to create MPD timed thread");
 128                 return;
 129         }
 130         timed_thread_register(thread, &thread);
 131         if (timed_thread_run(thread))
 132                 NORM_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                         NORM_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                         NORM_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.vol = status->volume;
 198                 if (status->random == 0) {
 199                         mpd_info.random = "Off";
 200                 } else if (status->random == 1) {
 201                         mpd_info.random = "On";
 202                 } else {
 203                         mpd_info.random = "";
 204                 }
 205                 if (status->repeat == 0) {
 206                         mpd_info.repeat = "Off";
 207                 } else if (status->repeat == 1) {
 208                         mpd_info.repeat = "On";
 209                 } else {
 210                         mpd_info.repeat = "";
 211                 }
 212                 /* if (status->error) {
 213                         printf("error: %s\n", status->error);
 214                 } */
 215
 216                 switch (status->state) {
 217                         case MPD_STATUS_STATE_PLAY:
 218                                 mpd_info.status = "Playing";
 219                                 break;
 220                         case MPD_STATUS_STATE_STOP:
 221                                 mpd_info.status = "Stopped";
 222                                 break;
 223                         case MPD_STATUS_STATE_PAUSE:
 224                                 mpd_info.status = "Paused";
 225                                 break;
 226                         default:
 227                                 mpd_info.status = "";
 228                                 clear_mpd();
 229                                 break;
 230                 }
 231
 232                 if (status->state == MPD_STATUS_STATE_PLAY ||
 233                     status->state == MPD_STATUS_STATE_PAUSE) {
 234                         mpd_info.is_playing = 1;
 235                         mpd_info.bitrate = status->bitRate;
 236                         mpd_info.progress = (float) status->elapsedTime /
 237                                 status->totalTime;
 238                         mpd_info.elapsed = status->elapsedTime;
 239                         mpd_info.length = status->totalTime;
 240                 } else {
 241                         mpd_info.progress = 0;
 242                         mpd_info.is_playing = 0;
 243                         mpd_info.elapsed = 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
 320 static inline void format_media_player_time(char *buf, const int size,
 321                 int seconds)
 322 {
 323         int days, hours, minutes;
 324
 325         if (times_in_seconds()) {
 326                 snprintf(buf, size, "%d", seconds);
 327                 return;
 328         }
 329
 330         days = seconds / (24 * 60 * 60);
 331         seconds %= (24 * 60 * 60);
 332         hours = seconds / (60 * 60);
 333         seconds %= (60 * 60);
 334         minutes = seconds / 60;
 335         seconds %= 60;
 336
 337         if (days > 0) {
 338                 snprintf(buf, size, "%i days %i:%02i:%02i", days,
 339                                 hours, minutes, seconds);
 340         } else if (hours > 0) {
 341                 snprintf(buf, size, "%i:%02i:%02i", hours, minutes,
 342                                 seconds);
 343         } else {
 344                 snprintf(buf, size, "%i:%02i", minutes, seconds);
 345         }
 346 }
 347
 348 void print_mpd_elapsed(struct text_object *obj, char *p, int p_max_size)
 349 {
 350         (void)obj;
 351         format_media_player_time(p, p_max_size, mpd_get_info()->elapsed);
 352 }
 353
 354 void print_mpd_length(struct text_object *obj, char *p, int p_max_size)
 355 {
 356         (void)obj;
 357         format_media_player_time(p, p_max_size, mpd_get_info()->length);
 358 }
 359
 360 void print_mpd_percent(struct text_object *obj, char *p, int p_max_size)
 361 {
 362         (void)obj;
 363         percent_print(p, p_max_size, (int)(mpd_get_info()->progress * 100));
 364 }
 365
 366 void print_mpd_bar(struct text_object *obj, char *p, int p_max_size)
 367 {
 368         new_bar(obj, p, p_max_size, (int) (mpd_get_info()->progress * 255.0f));
 369 }
 370
 371 void print_mpd_smart(struct text_object *obj, char *p, int p_max_size)
 372 {
 373         struct mpd_s *mpd = mpd_get_info();
 374         int len = obj->data.i;
 375         if (len == 0 || len > p_max_size)
 376                 len = p_max_size;
 377
 378         memset(p, 0, p_max_size);
 379         if (mpd->artist && *mpd->artist &&
 380                         mpd->title && *mpd->title) {
 381                 snprintf(p, len, "%s - %s", mpd->artist,
 382                                 mpd->title);
 383         } else if (mpd->title && *mpd->title) {
 384                 snprintf(p, len, "%s", mpd->title);
 385         } else if (mpd->artist && *mpd->artist) {
 386                 snprintf(p, len, "%s", mpd->artist);
 387         } else if (mpd->file && *mpd->file) {
 388                 snprintf(p, len, "%s", mpd->file);
 389         } else {
 390                 *p = 0;
 391         }
 392 }
 393
 394 #define MPD_PRINT_GENERATOR(name, fmt) \
 395 void print_mpd_##name(struct text_object *obj, char *p, int p_max_size) \
 396 { \
 397         if (obj->data.i && obj->data.i < p_max_size) \
 398                 p_max_size = obj->data.i; \
 399         snprintf(p, p_max_size, fmt, mpd_get_info()->name); \
 400 }
 401
 402 MPD_PRINT_GENERATOR(title, "%s")
 403 MPD_PRINT_GENERATOR(artist, "%s")
 404 MPD_PRINT_GENERATOR(album, "%s")
 405 MPD_PRINT_GENERATOR(random, "%s")
 406 MPD_PRINT_GENERATOR(repeat, "%s")
 407 MPD_PRINT_GENERATOR(track, "%s")
 408 MPD_PRINT_GENERATOR(name, "%s")
 409 MPD_PRINT_GENERATOR(file, "%s")
 410 MPD_PRINT_GENERATOR(vol, "%d")
 411 MPD_PRINT_GENERATOR(bitrate, "%d")
 412 MPD_PRINT_GENERATOR(status, "%s")
 413
 414 #undef MPD_PRINT_GENERATOR