fade.c

   1 /*
   2  * Copyright (C) 1998-2008 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 <stropts.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 <linux/soundcard.h>
  24 #include "string.h"
  25 #include "error.h"
  26
  27
  28 INIT_FADE_ERRLISTS;
  29 struct fade_args_info conf;
  30
  31 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 volume via mixer_fd
  55  */
  56 static int do_get_vol(int mixer_fd)
  57 {
  58         int volume;
  59
  60         if (ioctl(mixer_fd, MIXER_READ(SOUND_MIXER_VOLUME), &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 get_vol(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 = do_get_vol(mixer_fd);
  78         close(mixer_fd);
  79         return volume;
  80 }
  81
  82 /*
  83  * set volume via mixer_fd
  84  */
  85 static int do_set_vol(int mixer_fd, int volume)
  86 {
  87         int tmp = (volume << 8) + volume;
  88
  89         if (ioctl(mixer_fd, MIXER_WRITE(SOUND_MIXER_VOLUME), &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 set_vol(int volume)
  98 {
  99         int mixer_fd, ret = open_mixer();
 100
 101         if (ret < 0)
 102                 return ret;
 103         mixer_fd = ret;
 104         ret = do_set_vol(mixer_fd, volume);
 105         close(mixer_fd);
 106         return ret;
 107 }
 108
 109 /*
 110  * Open mixer, get volume, fade to new_vol in secs seconds and
 111  * close mixer
 112  */
 113 static int fade(int new_vol, int fade_time)
 114 {
 115         int vol, mixer_fd, diff, incr, ret;
 116         unsigned secs;
 117         struct timespec ts;
 118         unsigned long long tmp, tmp2; /* Careful with that axe, Eugene! */
 119
 120         if (fade_time <= 0)
 121                 return 1;
 122         secs = fade_time;
 123         PARA_NOTICE_LOG("fading to %d in %d seconds\n", new_vol, secs);
 124         ret = open_mixer();
 125         if (ret < 0)
 126                 return ret;
 127         mixer_fd = ret;
 128         ret = do_get_vol(mixer_fd);
 129         if (ret < 0)
 130                 goto out;
 131         vol = ret;
 132         diff = new_vol - vol;
 133         if (!diff) {
 134                 sleep(secs);
 135                 goto out;
 136         }
 137         incr = diff > 0? 1: -1;
 138         diff = diff > 0? diff: -diff;
 139         tmp = secs * 1000 / diff;
 140         tmp2 = tmp % 1000;
 141         while ((new_vol - vol) * incr > 0) {
 142                 ts.tv_nsec = tmp2 * 1000000; /* really nec ?*/
 143                 ts.tv_sec = tmp / 1000; /* really nec ?*/
 144                 //printf("ts.tv_sec: %i\n", ts.tv_nsec);
 145                 vol += incr;
 146                 ret = do_set_vol(mixer_fd, vol);
 147                 if (ret < 0)
 148                         goto out;
 149                 //printf("vol = %i\n", vol);
 150                 nanosleep(&ts, NULL);
 151         }
 152 out:
 153         close(mixer_fd);
 154         return ret;
 155 }
 156
 157 static void client_cmd(const char *cmd)
 158 {
 159         int ret, fds[3] = {0, 0, 0};
 160         pid_t pid;
 161         char *cmdline = make_message(BINDIR "/para_client %s", cmd);
 162
 163         PARA_INFO_LOG("%s\n", cmdline);
 164         ret = para_exec_cmdline_pid(&pid, cmdline, fds);
 165         free(cmdline);
 166         if (ret < 0) {
 167                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 168                 exit(EXIT_FAILURE);
 169         }
 170         do
 171                 ret = wait(NULL);
 172         while (ret != -1 && errno != ECHILD);
 173 }
 174
 175 static void change_afs_mode_and_play(char *afs_mode)
 176 {
 177         char *cmd;
 178
 179         client_cmd("stop");
 180         if (!afs_mode)
 181                 return;
 182         cmd = make_message("select %s\n", afs_mode);
 183         client_cmd(cmd);
 184         free(cmd);
 185         client_cmd("play");
 186 }
 187
 188 /*
 189  * sleep
 190  */
 191 static int sweet_dreams(void)
 192 {
 193         time_t t1, wake_time_epoch;
 194         unsigned int delay;
 195         struct tm *tm;
 196         int ret, min = conf.wake_min_arg;
 197         char *fa_mode = conf.fa_mode_arg;
 198         char *wake_mode = conf.wake_mode_arg;
 199         char *sleep_mode = conf.sleep_mode_arg;
 200         int wf = conf.wake_fade_arg;
 201         int sf = conf.fa_fade_arg;
 202         int wv = conf.wake_vol_arg;
 203         int sv = conf.fa_vol_arg;
 204         int iv = conf.sleep_ivol_arg;
 205
 206         /* calculate wake time */
 207         time(&t1);
 208         if (conf.wake_hour_given) {
 209                 int hour = conf.wake_hour_arg;
 210                 tm = localtime(&t1);
 211                 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
 212                         t1 += 86400; /* wake time is tomorrow */
 213                         tm = localtime(&t1);
 214                 }
 215                 tm->tm_hour = hour;
 216                 tm->tm_min = min;
 217                 tm->tm_sec = 0;
 218         } else {
 219                 t1 += 9 * 60 * 60; /* nine hours from now */
 220                 PARA_INFO_LOG("default wake time: %lu\n", t1);
 221                 tm = localtime(&t1);
 222         }
 223         wake_time_epoch = mktime(tm);
 224         PARA_INFO_LOG("waketime: %s", asctime(tm));
 225         client_cmd("stop");
 226         sleep(1);
 227         if (sf) {
 228                 PARA_INFO_LOG("initial volume: %d\n", iv);
 229                 ret = set_vol(iv);
 230                 if (ret < 0)
 231                         return ret;
 232                 change_afs_mode_and_play(fa_mode);
 233                 ret = fade(sv, sf);
 234                 if (ret < 0)
 235                         return ret;
 236         } else {
 237                 ret = set_vol(sf);
 238                 if (ret < 0)
 239                         return ret;
 240         }
 241         if (conf.sleep_mode_given)
 242                 change_afs_mode_and_play(sleep_mode);
 243         else
 244                 client_cmd("stop");
 245         if (!wf)
 246                 return 1;
 247         for (;;) {
 248                 time(&t1);
 249                 if (wake_time_epoch <= t1 + wf)
 250                         break;
 251                 delay = wake_time_epoch - t1 - wf;
 252                 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
 253                         delay, delay / 3600,
 254                         (delay % 3600) / 60);
 255                 sleep(delay);
 256         }
 257         change_afs_mode_and_play(wake_mode);
 258         ret = fade(wv, wf);
 259         PARA_INFO_LOG("fade complete, returning\n");
 260         return ret;
 261 }
 262
 263 static int snooze(void)
 264 {
 265         int ret;
 266         unsigned sleep_time;
 267
 268         if (conf.snooze_time_arg <= 0)
 269                 return 1;
 270         sleep_time = conf.snooze_time_arg;
 271         if (get_vol() < conf.snooze_out_vol_arg)
 272                 ret = set_vol(conf.snooze_out_vol_arg);
 273         else
 274                 ret = fade(conf.snooze_out_vol_arg, conf.snooze_out_fade_arg);
 275         if (ret < 0)
 276                 return ret;
 277         client_cmd("pause");
 278         PARA_NOTICE_LOG("%d seconds snooze time...\n", conf.snooze_time_arg);
 279         sleep(sleep_time);
 280         client_cmd("play");
 281         return fade(conf.snooze_in_vol_arg, conf.snooze_in_fade_arg);
 282 }
 283
 284 static int configfile_exists(void)
 285 {
 286         static char *config_file;
 287
 288         if (!conf.config_file_given) {
 289                 char *home = para_homedir();
 290                 free(config_file);
 291                 config_file = make_message("%s/.paraslash/fade.conf", home);
 292                 free(home);
 293                 conf.config_file_arg = config_file;
 294         }
 295         return file_exists(conf.config_file_arg);
 296 }
 297
 298 int main(int argc, char *argv[])
 299 {
 300         int ret;
 301
 302         if (fade_cmdline_parser(argc, argv, &conf))
 303                 exit(EXIT_FAILURE);
 304         HANDLE_VERSION_FLAG("fade", conf);
 305         ret = configfile_exists();
 306         if (!ret && conf.config_file_given) {
 307                 PARA_EMERG_LOG("can not read config file %s\n",
 308                         conf.config_file_arg);
 309                 exit(EXIT_FAILURE);
 310         }
 311         if (ret) {
 312                 struct fade_cmdline_parser_params params = {
 313                         .override = 0,
 314                         .initialize = 0,
 315                         .check_required = 0,
 316                         .check_ambiguity = 0
 317                 };
 318                 fade_cmdline_parser_config_file(conf.config_file_arg,
 319                         &conf, &params);
 320         }
 321         if (!strcmp(conf.mode_arg, "sleep")) {
 322                 ret = sweet_dreams();
 323                 goto out;
 324         }
 325         if (!strcmp(conf.mode_arg, "fade")) {
 326                 ret = fade(conf.fade_vol_arg, conf.fade_time_arg);
 327                 goto out;
 328         }
 329         if (!strcmp(conf.mode_arg, "snooze")) {
 330                 ret = snooze();
 331                 goto out;
 332         }
 333         ret = -E_FADE_SYNTAX;
 334 out:
 335         if (ret < 0)
 336                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 337         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 338 }