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