fade.c

   1 /*
   2  * Copyright (C) 1998-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file fade.c A volume fader and alarm clock for linux. */
   8
   9 #include <sys/types.h>
  10 #include <dirent.h>
  11
  12 #include "fade.cmdline.h"
  13 #include "para.h"
  14 #include "fd.h"
  15
  16 #include <sys/ioctl.h>
  17 #include <ctype.h>
  18 #include <stdlib.h> /* EXIT_SUCCESS */
  19 #include <unistd.h>
  20 #include <signal.h>
  21 #include <string.h>
  22 #include <limits.h>
  23 #include <sys/soundcard.h>
  24 #include "string.h"
  25 #include "error.h"
  26
  27
  28 INIT_FADE_ERRLISTS;
  29 struct fade_args_info conf;
  30
  31 __printf_2_3 void para_log(__a_unused int ll, const char *fmt, ...)
  32 {
  33         va_list argp;
  34         time_t t1;
  35         struct tm *tm;
  36
  37         time(&t1);
  38         tm = localtime(&t1);
  39         printf("%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
  40         va_start(argp, fmt);
  41         vprintf(fmt, argp);
  42         va_end(argp);
  43 }
  44
  45 /*
  46  * open mixer device
  47  */
  48 static int open_mixer(void)
  49 {
  50         return para_open(conf.mixer_device_arg, O_RDWR, 42);
  51 }
  52
  53 /*
  54  * Get channel volume via mixer_fd.
  55  */
  56 static int get_mixer_channel(int mixer_fd)
  57 {
  58         int volume;
  59
  60         if (ioctl(mixer_fd, MIXER_READ(conf.mixer_channel_arg), &volume) < 0)
  61                 return -ERRNO_TO_PARA_ERROR(errno);
  62         /* take the mean value of left and right volume */
  63         return (volume % 256 + (volume >> 8)) / 2;
  64 }
  65
  66 /*
  67  * Open mixer, get volume and close mixer.
  68  */
  69 static int open_and_get_mixer_channel(void)
  70 {
  71         int mixer_fd;
  72         int volume;
  73
  74         mixer_fd = open_mixer();
  75         if (mixer_fd < 0)
  76                 return mixer_fd;
  77         volume = get_mixer_channel(mixer_fd);
  78         close(mixer_fd);
  79         return volume;
  80 }
  81
  82 /*
  83  * Set channel volume via mixer_fd.
  84  */
  85 static int set_mixer_channel(int mixer_fd, int volume)
  86 {
  87         int tmp = (volume << 8) + volume;
  88
  89         if (ioctl(mixer_fd, MIXER_WRITE(conf.mixer_channel_arg), &tmp) < 0)
  90                 return -ERRNO_TO_PARA_ERROR(errno);
  91         return 1;
  92 }
  93
  94 /*
  95  * Open mixer, set volume and close mixer.
  96  */
  97 static int open_and_set_mixer_channel(int volume)
  98 {
  99         int mixer_fd, ret = open_mixer();
 100
 101         if (ret < 0)
 102                 return ret;
 103         mixer_fd = ret;
 104         ret = set_mixer_channel(mixer_fd, volume);
 105         close(mixer_fd);
 106         return ret;
 107 }
 108
 109 static void fixup_mixer_channel_arg(void)
 110 {
 111         int val = SOUND_MIXER_VOLUME; /* STFU, gcc */
 112
 113         switch (conf.mixer_channel_arg) {
 114                 case mixer_channel_arg_volume: val = SOUND_MIXER_VOLUME; break;
 115                 case mixer_channel_arg_bass: val = SOUND_MIXER_BASS; break;
 116                 case mixer_channel_arg_treble: val = SOUND_MIXER_TREBLE; break;
 117                 case mixer_channel_arg_synth: val = SOUND_MIXER_SYNTH; break;
 118                 case mixer_channel_arg_pcm: val = SOUND_MIXER_PCM; break;
 119                 case mixer_channel_arg_speaker: val = SOUND_MIXER_SPEAKER; break;
 120                 case mixer_channel_arg_line: val = SOUND_MIXER_LINE; break;
 121                 case mixer_channel_arg_mic: val = SOUND_MIXER_MIC; break;
 122                 case mixer_channel_arg_cd: val = SOUND_MIXER_CD; break;
 123                 case mixer_channel_arg_imix: val = SOUND_MIXER_IMIX; break;
 124                 case mixer_channel_arg_altpcm: val = SOUND_MIXER_ALTPCM; break;
 125                 case mixer_channel_arg_reclev: val = SOUND_MIXER_RECLEV; break;
 126                 case mixer_channel_arg_igain: val = SOUND_MIXER_IGAIN; break;
 127                 case mixer_channel_arg_ogain: val = SOUND_MIXER_OGAIN; break;
 128         }
 129         conf.mixer_channel_arg = val;
 130 }
 131
 132 /*
 133  * Open mixer, get volume, fade to new_vol in secs seconds and
 134  * close mixer
 135  */
 136 static int fade(int new_vol, int fade_time)
 137 {
 138         int vol, mixer_fd, diff, incr, ret;
 139         unsigned secs;
 140         struct timespec ts;
 141         unsigned long long tmp, tmp2; /* Careful with that axe, Eugene! */
 142
 143         if (fade_time <= 0)
 144                 return 1;
 145         secs = fade_time;
 146         PARA_NOTICE_LOG("fading to %d in %d seconds\n", new_vol, secs);
 147         ret = open_mixer();
 148         if (ret < 0)
 149                 return ret;
 150         mixer_fd = ret;
 151         ret = get_mixer_channel(mixer_fd);
 152         if (ret < 0)
 153                 goto out;
 154         vol = ret;
 155         diff = new_vol - vol;
 156         if (!diff) {
 157                 sleep(secs);
 158                 goto out;
 159         }
 160         incr = diff > 0? 1: -1;
 161         diff = diff > 0? diff: -diff;
 162         tmp = secs * 1000 / diff;
 163         tmp2 = tmp % 1000;
 164         while ((new_vol - vol) * incr > 0) {
 165                 ts.tv_nsec = tmp2 * 1000000; /* really nec ?*/
 166                 ts.tv_sec = tmp / 1000; /* really nec ?*/
 167                 //printf("ts.tv_sec: %i\n", ts.tv_nsec);
 168                 vol += incr;
 169                 ret = set_mixer_channel(mixer_fd, vol);
 170                 if (ret < 0)
 171                         goto out;
 172                 //printf("vol = %i\n", vol);
 173                 nanosleep(&ts, NULL);
 174         }
 175 out:
 176         close(mixer_fd);
 177         return ret;
 178 }
 179
 180 static void client_cmd(const char *cmd)
 181 {
 182         int ret, fds[3] = {0, 0, 0};
 183         pid_t pid;
 184         char *cmdline = make_message(BINDIR "/para_client %s", cmd);
 185
 186         PARA_INFO_LOG("%s\n", cmdline);
 187         ret = para_exec_cmdline_pid(&pid, cmdline, fds);
 188         free(cmdline);
 189         if (ret < 0) {
 190                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 191                 exit(EXIT_FAILURE);
 192         }
 193         do
 194                 ret = wait(NULL);
 195         while (ret != -1 && errno != ECHILD);
 196 }
 197
 198 static void change_afs_mode_and_play(char *afs_mode)
 199 {
 200         char *cmd;
 201
 202         client_cmd("stop");
 203         if (!afs_mode)
 204                 return;
 205         cmd = make_message("select %s\n", afs_mode);
 206         client_cmd(cmd);
 207         free(cmd);
 208         client_cmd("play");
 209 }
 210
 211 /*
 212  * sleep
 213  */
 214 static int sweet_dreams(void)
 215 {
 216         time_t t1, wake_time_epoch;
 217         unsigned int delay;
 218         struct tm *tm;
 219         int ret, min = conf.wake_min_arg;
 220         char *fa_mode = conf.fa_mode_arg;
 221         char *wake_mode = conf.wake_mode_arg;
 222         char *sleep_mode = conf.sleep_mode_arg;
 223         int wf = conf.wake_fade_arg;
 224         int sf = conf.fa_fade_arg;
 225         int wv = conf.wake_vol_arg;
 226         int sv = conf.fa_vol_arg;
 227         int iv = conf.sleep_ivol_arg;
 228
 229         /* calculate wake time */
 230         time(&t1);
 231         if (conf.wake_hour_given) {
 232                 int hour = conf.wake_hour_arg;
 233                 tm = localtime(&t1);
 234                 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
 235                         t1 += 86400; /* wake time is tomorrow */
 236                         tm = localtime(&t1);
 237                 }
 238                 tm->tm_hour = hour;
 239                 tm->tm_min = min;
 240                 tm->tm_sec = 0;
 241         } else {
 242                 t1 += 9 * 60 * 60; /* nine hours from now */
 243                 PARA_INFO_LOG("default wake time: %lu\n", (long unsigned)t1);
 244                 tm = localtime(&t1);
 245         }
 246         wake_time_epoch = mktime(tm);
 247         PARA_INFO_LOG("waketime: %s", asctime(tm));
 248         client_cmd("stop");
 249         sleep(1);
 250         if (sf) {
 251                 PARA_INFO_LOG("initial volume: %d\n", iv);
 252                 ret = open_and_set_mixer_channel(iv);
 253                 if (ret < 0)
 254                         return ret;
 255                 change_afs_mode_and_play(fa_mode);
 256                 ret = fade(sv, sf);
 257                 if (ret < 0)
 258                         return ret;
 259         } else {
 260                 ret = open_and_set_mixer_channel(sf);
 261                 if (ret < 0)
 262                         return ret;
 263         }
 264         if (conf.sleep_mode_given)
 265                 change_afs_mode_and_play(sleep_mode);
 266         else
 267                 client_cmd("stop");
 268         if (!wf)
 269                 return 1;
 270         for (;;) {
 271                 time(&t1);
 272                 if (wake_time_epoch <= t1 + wf)
 273                         break;
 274                 delay = wake_time_epoch - t1 - wf;
 275                 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
 276                         delay, delay / 3600,
 277                         (delay % 3600) / 60);
 278                 sleep(delay);
 279         }
 280         change_afs_mode_and_play(wake_mode);
 281         ret = fade(wv, wf);
 282         PARA_INFO_LOG("fade complete, returning\n");
 283         return ret;
 284 }
 285
 286 static int snooze(void)
 287 {
 288         int ret;
 289         unsigned sleep_time;
 290
 291         if (conf.snooze_time_arg <= 0)
 292                 return 1;
 293         sleep_time = conf.snooze_time_arg;
 294         if (open_and_get_mixer_channel() < conf.snooze_out_vol_arg)
 295                 ret = open_and_set_mixer_channel(conf.snooze_out_vol_arg);
 296         else
 297                 ret = fade(conf.snooze_out_vol_arg, conf.snooze_out_fade_arg);
 298         if (ret < 0)
 299                 return ret;
 300         client_cmd("pause");
 301         PARA_NOTICE_LOG("%d seconds snooze time...\n", conf.snooze_time_arg);
 302         sleep(sleep_time);
 303         client_cmd("play");
 304         return fade(conf.snooze_in_vol_arg, conf.snooze_in_fade_arg);
 305 }
 306
 307 static int configfile_exists(void)
 308 {
 309         static char *config_file;
 310
 311         if (!conf.config_file_given) {
 312                 char *home = para_homedir();
 313                 free(config_file);
 314                 config_file = make_message("%s/.paraslash/fade.conf", home);
 315                 free(home);
 316                 conf.config_file_arg = config_file;
 317         }
 318         return file_exists(conf.config_file_arg);
 319 }
 320
 321 int main(int argc, char *argv[])
 322 {
 323         int ret;
 324
 325         if (fade_cmdline_parser(argc, argv, &conf))
 326                 exit(EXIT_FAILURE);
 327         HANDLE_VERSION_FLAG("fade", conf);
 328         ret = configfile_exists();
 329         if (!ret && conf.config_file_given) {
 330                 PARA_EMERG_LOG("can not read config file %s\n",
 331                         conf.config_file_arg);
 332                 exit(EXIT_FAILURE);
 333         }
 334         if (ret) {
 335                 struct fade_cmdline_parser_params params = {
 336                         .override = 0,
 337                         .initialize = 0,
 338                         .check_required = 0,
 339                         .check_ambiguity = 0
 340                 };
 341                 fade_cmdline_parser_config_file(conf.config_file_arg,
 342                         &conf, &params);
 343         }
 344         fixup_mixer_channel_arg();
 345         if (!strcmp(conf.mode_arg, "sleep")) {
 346                 ret = sweet_dreams();
 347                 goto out;
 348         }
 349         if (!strcmp(conf.mode_arg, "fade")) {
 350                 ret = fade(conf.fade_vol_arg, conf.fade_time_arg);
 351                 goto out;
 352         }
 353         if (!strcmp(conf.mode_arg, "snooze")) {
 354                 ret = snooze();
 355                 goto out;
 356         }
 357         ret = -E_FADE_SYNTAX;
 358 out:
 359         if (ret < 0)
 360                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 361         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 362 }