fade.c

   1 /*
   2  * Copyright (C) 1998-2007 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 */
   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 <curses.h>
  19 #include <stdlib.h> /* EXIT_SUCCESS */
  20 #include <unistd.h>
  21 #include <signal.h>
  22 #include <string.h>
  23 #include <limits.h>
  24 #include <linux/soundcard.h>
  25 #include "string.h"
  26
  27
  28 struct fade_args_info conf;
  29
  30 void para_log(__a_unused int ll, const char *fmt,...)
  31 {
  32         va_list argp;
  33         time_t t1;
  34         struct tm *tm;
  35
  36         time(&t1);
  37         tm = localtime(&t1);
  38         printf("%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
  39         va_start(argp, fmt);
  40         vprintf(fmt, argp);
  41         va_end(argp);
  42 }
  43
  44 /*
  45  * open mixer device
  46  */
  47 static int open_mixer(void)
  48 {
  49         return open(conf.mixer_device_arg, O_RDWR, 0);
  50 }
  51
  52 /*
  53  * get volume via mixer_fd
  54  */
  55 static int do_get_vol(int mixer_fd)
  56 {
  57         int volume;
  58
  59         if (ioctl(mixer_fd, MIXER_READ(SOUND_MIXER_VOLUME), &volume) < 0)
  60                 return -1;
  61         /* take the mean value of left and right volume */
  62         return (volume % 256 + (volume >> 8)) / 2;
  63 }
  64
  65 /*
  66  * open mixer, get volume and close mixer
  67  */
  68 static int get_vol(void)
  69 {
  70         int mixer_fd;
  71         int volume;
  72
  73         mixer_fd = open_mixer();
  74         if (mixer_fd < 0)
  75                 return -1;
  76         volume = do_get_vol(mixer_fd);
  77         close(mixer_fd);
  78         return volume;
  79 }
  80
  81 /*
  82  * set volume via mixer_fd
  83  */
  84 static int do_set_vol(int mixer_fd, int volume)
  85 {
  86         int tmp = (volume << 8) + volume;
  87
  88         if (ioctl(mixer_fd, MIXER_WRITE(SOUND_MIXER_VOLUME), &tmp) < 0)
  89                 return -1;
  90         return 1;
  91 }
  92
  93 /*
  94  * open mixer, set volume and close mixer
  95  */
  96 static int set_vol(int volume)
  97 {
  98         int mixer_fd, ret = open_mixer();
  99
 100         if (ret < 0)
 101                 return ret;
 102         mixer_fd = ret;
 103         ret = do_set_vol(mixer_fd, volume);
 104         close(mixer_fd);
 105         return ret;
 106 }
 107
 108 /*
 109  * Open mixer, get volume, fade to new_vol in secs seconds and
 110  * close mixer
 111  */
 112 static void fade(int new_vol, int fade_time)
 113 {
 114         int vol, mixer_fd, diff, incr;
 115         unsigned secs;
 116         struct timespec ts;
 117         unsigned long long tmp, tmp2; /* Careful with that axe, Eugene! */
 118
 119         if (fade_time <= 0)
 120                 return;
 121         secs = fade_time;
 122         PARA_NOTICE_LOG("fading to %d in %d seconds\n", new_vol, secs);
 123         mixer_fd = open_mixer();
 124         if (mixer_fd < 0)
 125                 return;
 126         vol = do_get_vol(mixer_fd);
 127         if (vol < 0)
 128                 goto out;
 129         diff = new_vol - vol;
 130         if (!diff) {
 131                 sleep(secs);
 132                 goto out;
 133         }
 134         incr = diff > 0? 1: -1;
 135         diff = diff > 0? diff: -diff;
 136         tmp = secs * 1000 / diff;
 137         tmp2 = tmp % 1000;
 138         while ((new_vol - vol) * incr > 0) {
 139                 ts.tv_nsec = tmp2 * 1000000; /* really nec ?*/
 140                 ts.tv_sec = tmp / 1000; /* really nec ?*/
 141                 //printf("ts.tv_sec: %i\n", ts.tv_nsec);
 142                 vol += incr;
 143                 if (do_set_vol(mixer_fd, vol) < 0)
 144                         goto out;
 145                 //printf("vol = %i\n", vol);
 146                 nanosleep(&ts, NULL);
 147         }
 148 out:
 149         close(mixer_fd);
 150 }
 151
 152 static void client_cmd(const char *cmd)
 153 {
 154         int ret, fds[3] = {0, 0, 0};
 155         pid_t pid;
 156         char *cmdline = make_message(BINDIR "/para_client %s", cmd);
 157
 158         PARA_INFO_LOG("%s\n", cmdline);
 159         ret = para_exec_cmdline_pid(&pid, cmdline, fds);
 160         free(cmdline);
 161         if (ret < 0)
 162                 exit(EXIT_FAILURE);
 163         do
 164                 ret = wait(NULL);
 165         while (ret != -1 && errno != ECHILD);
 166 }
 167
 168 static void change_afs_mode_and_play(char *afs_mode)
 169 {
 170         char *cmd;
 171
 172         client_cmd("stop");
 173         if (!afs_mode)
 174                 return;
 175         cmd = make_message("select %s\n", afs_mode);
 176         client_cmd(cmd);
 177         free(cmd);
 178         client_cmd("play");
 179 }
 180
 181 /*
 182  * sleep
 183  */
 184 static void sweet_dreams(void)
 185 {
 186         time_t t1, wake_time_epoch;
 187         unsigned int delay;
 188         struct tm *tm;
 189         int min = conf.wake_min_arg;
 190         char *fa_mode = conf.fa_mode_arg;
 191         char *wake_mode = conf.wake_mode_arg;
 192         char *sleep_mode = conf.sleep_mode_arg;
 193         int wf = conf.wake_fade_arg;
 194         int sf = conf.fa_fade_arg;
 195         int wv = conf.wake_vol_arg;
 196         int sv = conf.fa_vol_arg;
 197         int iv = conf.sleep_ivol_arg;
 198
 199         /* calculate wake time */
 200         time(&t1);
 201         if (conf.wake_hour_given) {
 202                 int hour = conf.wake_hour_arg;
 203                 tm = localtime(&t1);
 204                 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
 205                         t1 += 86400; /* wake time is tomorrow */
 206                         tm = localtime(&t1);
 207                 }
 208                 tm->tm_hour = hour;
 209                 tm->tm_min = min;
 210                 tm->tm_sec = 0;
 211         } else {
 212                 t1 += 9 * 60 * 60; /* nine hours from now */
 213                 PARA_INFO_LOG("default wake time: %lu\n", t1);
 214                 tm = localtime(&t1);
 215         }
 216         wake_time_epoch = mktime(tm);
 217         PARA_INFO_LOG("waketime: %s", asctime(tm));
 218         client_cmd("stop");
 219         sleep(1);
 220         if (sf) {
 221                 PARA_INFO_LOG("initial volume: %d\n", iv);
 222                 set_vol(iv);
 223                 change_afs_mode_and_play(fa_mode);
 224                 fade(sv, sf);
 225         } else
 226                 set_vol(sf);
 227         change_afs_mode_and_play(sleep_mode);
 228         if (!wf)
 229                 return;
 230         for (;;) {
 231                 time(&t1);
 232                 if (wake_time_epoch <= t1 + wf)
 233                         break;
 234                 delay = wake_time_epoch - t1 - wf;
 235                 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
 236                         delay, delay / 3600,
 237                         (delay % 3600) / 60);
 238                 sleep(delay);
 239         }
 240         change_afs_mode_and_play(wake_mode);
 241         fade(wv, wf);
 242         PARA_INFO_LOG("fade complete, returning\n");
 243 }
 244
 245 static void snooze(void)
 246 {
 247         unsigned sleep_time;
 248
 249         if (conf.snooze_time_arg <= 0)
 250                 return;
 251         sleep_time = conf.snooze_time_arg;
 252         if (get_vol() < conf.snooze_out_vol_arg)
 253                 set_vol(conf.snooze_out_vol_arg);
 254         else
 255                 fade(conf.snooze_out_vol_arg, conf.snooze_out_fade_arg);
 256         client_cmd("pause");
 257         PARA_NOTICE_LOG("%d seconds snooze time...\n", conf.snooze_time_arg);
 258         sleep(sleep_time);
 259         client_cmd("play");
 260         fade(conf.snooze_in_vol_arg, conf.snooze_in_fade_arg);
 261 }
 262
 263 static int configfile_exists(void)
 264 {
 265         static char *config_file;
 266
 267         if (!conf.config_file_given) {
 268                 char *home = para_homedir();
 269                 free(config_file);
 270                 config_file = make_message("%s/.paraslash/fade.conf", home);
 271                 free(home);
 272                 conf.config_file_arg = config_file;
 273         }
 274         return file_exists(conf.config_file_arg);
 275 }
 276
 277
 278 int main(int argc, char *argv[])
 279 {
 280         int ret;
 281
 282         if (fade_cmdline_parser(argc, argv, &conf))
 283                 exit(EXIT_FAILURE);
 284         HANDLE_VERSION_FLAG("fade", conf);
 285         ret = configfile_exists();
 286         if (!ret && conf.config_file_given) {
 287                 PARA_EMERG_LOG("can not read config file %s\n",
 288                         conf.config_file_arg);
 289                 exit(EXIT_FAILURE);
 290         }
 291         if (ret) {
 292                 struct fade_cmdline_parser_params params = {
 293                         .override = 0,
 294                         .initialize = 0,
 295                         .check_required = 0,
 296                         .check_ambiguity = 0
 297                 };
 298                 fade_cmdline_parser_config_file(conf.config_file_arg,
 299                         &conf, &params);
 300         }
 301         ret = open_mixer();
 302         if (ret < 0) {
 303                 PARA_EMERG_LOG("can not open mixer device %s.",
 304                         conf.mixer_device_arg);
 305                 exit(EXIT_FAILURE);
 306         }
 307         close(ret);
 308         ret = 0;
 309 //      setlinebuf(stdout);
 310         if (!strcmp(conf.mode_arg, "sleep")) {
 311                 sweet_dreams();
 312                 goto out;
 313         }
 314         if (!strcmp(conf.mode_arg, "fade")) {
 315                 fade(conf.fade_vol_arg, conf.fade_time_arg);
 316                 goto out;
 317         }
 318         if (!strcmp(conf.mode_arg, "snooze")) {
 319                 snooze();
 320                 goto out;
 321         }
 322         ret = -1;
 323 out:
 324         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 325 }