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) 2005-2010 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(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                 NORM_ERR("Failed to create MPD timed thread");
 130                 return;
 131         }
 132         timed_thread_register(thread, &thread);
 133         if (timed_thread_run(thread))
 134                 NORM_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                         NORM_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                         NORM_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.vol = status->volume;
 200                 if (status->random == 0) {
 201                         mpd_info.random = "Off";
 202                 } else if (status->random == 1) {
 203                         mpd_info.random = "On";
 204                 } else {
 205                         mpd_info.random = "";
 206                 }
 207                 if (status->repeat == 0) {
 208                         mpd_info.repeat = "Off";
 209                 } else if (status->repeat == 1) {
 210                         mpd_info.repeat = "On";
 211                 } else {
 212                         mpd_info.repeat = "";
 213                 }
 214                 /* if (status->error) {
 215                         printf("error: %s\n", status->error);
 216                 } */
 217
 218                 switch (status->state) {
 219                         case MPD_STATUS_STATE_PLAY:
 220                                 mpd_info.status = "Playing";
 221                                 break;
 222                         case MPD_STATUS_STATE_STOP:
 223                                 mpd_info.status = "Stopped";
 224                                 break;
 225                         case MPD_STATUS_STATE_PAUSE:
 226                                 mpd_info.status = "Paused";
 227                                 break;
 228                         default:
 229                                 mpd_info.status = "";
 230                                 clear_mpd();
 231                                 break;
 232                 }
 233
 234                 if (status->state == MPD_STATUS_STATE_PLAY ||
 235                     status->state == MPD_STATUS_STATE_PAUSE) {
 236                         mpd_info.is_playing = 1;
 237                         mpd_info.bitrate = status->bitRate;
 238                         mpd_info.progress = (float) status->elapsedTime /
 239                                 status->totalTime;
 240                         mpd_info.elapsed = status->elapsedTime;
 241                         mpd_info.length = status->totalTime;
 242                 } else {
 243                         mpd_info.progress = 0;
 244                         mpd_info.is_playing = 0;
 245                         mpd_info.elapsed = 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
 322 static inline void format_media_player_time(char *buf, const int size,
 323                 int seconds)
 324 {
 325         int days, hours, minutes;
 326
 327         if (times_in_seconds()) {
 328                 snprintf(buf, size, "%d", seconds);
 329                 return;
 330         }
 331
 332         days = seconds / (24 * 60 * 60);
 333         seconds %= (24 * 60 * 60);
 334         hours = seconds / (60 * 60);
 335         seconds %= (60 * 60);
 336         minutes = seconds / 60;
 337         seconds %= 60;
 338
 339         if (days > 0) {
 340                 snprintf(buf, size, "%i days %i:%02i:%02i", days,
 341                                 hours, minutes, seconds);
 342         } else if (hours > 0) {
 343                 snprintf(buf, size, "%i:%02i:%02i", hours, minutes,
 344                                 seconds);
 345         } else {
 346                 snprintf(buf, size, "%i:%02i", minutes, seconds);
 347         }
 348 }
 349
 350 void print_mpd_elapsed(struct text_object *obj, char *p, int p_max_size)
 351 {
 352         (void)obj;
 353         format_media_player_time(p, p_max_size, mpd_get_info()->elapsed);
 354 }
 355
 356 void print_mpd_length(struct text_object *obj, char *p, int p_max_size)
 357 {
 358         (void)obj;
 359         format_media_player_time(p, p_max_size, mpd_get_info()->length);
 360 }
 361
 362 void print_mpd_percent(struct text_object *obj, char *p, int p_max_size)
 363 {
 364         (void)obj;
 365         percent_print(p, p_max_size, (int)(mpd_get_info()->progress * 100));
 366 }
 367
 368 void print_mpd_bar(struct text_object *obj, char *p, int p_max_size)
 369 {
 370         new_bar(obj, p, p_max_size, (int) (mpd_get_info()->progress * 255.0f));
 371 }
 372
 373 void print_mpd_smart(struct text_object *obj, char *p, int p_max_size)
 374 {
 375         struct mpd_s *mpd = mpd_get_info();
 376         int len = obj->data.i;
 377         if (len == 0 || len > p_max_size)
 378                 len = p_max_size;
 379
 380         memset(p, 0, p_max_size);
 381         if (mpd->artist && *mpd->artist &&
 382                         mpd->title && *mpd->title) {
 383                 snprintf(p, len, "%s - %s", mpd->artist,
 384                                 mpd->title);
 385         } else if (mpd->title && *mpd->title) {
 386                 snprintf(p, len, "%s", mpd->title);
 387         } else if (mpd->artist && *mpd->artist) {
 388                 snprintf(p, len, "%s", mpd->artist);
 389         } else if (mpd->file && *mpd->file) {
 390                 snprintf(p, len, "%s", mpd->file);
 391         } else {
 392                 *p = 0;
 393         }
 394 }
 395
 396 #define MPD_PRINT_GENERATOR(name, fmt) \
 397 void print_mpd_##name(struct text_object *obj, char *p, int p_max_size) \
 398 { \
 399         if (obj->data.i && obj->data.i < p_max_size) \
 400                 p_max_size = obj->data.i; \
 401         snprintf(p, p_max_size, fmt, mpd_get_info()->name); \
 402 }
 403
 404 MPD_PRINT_GENERATOR(title, "%s")
 405 MPD_PRINT_GENERATOR(artist, "%s")
 406 MPD_PRINT_GENERATOR(album, "%s")
 407 MPD_PRINT_GENERATOR(random, "%s")
 408 MPD_PRINT_GENERATOR(repeat, "%s")
 409 MPD_PRINT_GENERATOR(track, "%s")
 410 MPD_PRINT_GENERATOR(name, "%s")
 411 MPD_PRINT_GENERATOR(file, "%s")
 412 MPD_PRINT_GENERATOR(vol, "%d")
 413 MPD_PRINT_GENERATOR(bitrate, "%d")
 414 MPD_PRINT_GENERATOR(status, "%s")
 415
 416 #undef MPD_PRINT_GENERATOR