fade.c

   1 /*
   2  * Copyright (C) 1998-2013 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
  11 #include "fade.cmdline.h"
  12 #include "para.h"
  13 #include "fd.h"
  14 #include "string.h"
  15 #include "mix.h"
  16 #include "error.h"
  17 #include "ggo.h"
  18 #include "version.h"
  19
  20 INIT_FADE_ERRLISTS;
  21 static struct fade_args_info conf;
  22
  23 enum mixer_id {MIXER_ENUM};
  24 static char *mixer_name[] = {MIXER_NAMES};
  25 DECLARE_MIXER_INITS;
  26 static struct mixer supported_mixer[] = {MIXER_ARRAY};
  27 #define FOR_EACH_MIXER(i) for ((i) = 0; (i) < NUM_SUPPORTED_MIXERS; (i)++)
  28
  29 static int loglevel;
  30 static __printf_2_3 void date_log(int ll, const char *fmt, ...)
  31 {
  32         va_list argp;
  33         time_t t1;
  34         struct tm *tm;
  35
  36         if (ll < loglevel)
  37                 return;
  38         time(&t1);
  39         tm = localtime(&t1);
  40         fprintf(stderr, "%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
  41         va_start(argp, fmt);
  42         vprintf(fmt, argp);
  43         va_end(argp);
  44 }
  45 __printf_2_3 void (*para_log)(int, const char*, ...) = date_log;
  46
  47 static int set_channel(struct mixer *m, struct mixer_handle *h, const char *channel)
  48 {
  49         char *channels;
  50         int ret;
  51
  52         ret = m->set_channel(h, channel);
  53         if (ret >= 0) {
  54                 PARA_NOTICE_LOG("using %s mixer channel\n",
  55                         channel? channel : "default");
  56                 return ret;
  57         }
  58         channels = m->get_channels(h);
  59         printf("Available channels: %s\n", channels);
  60         free(channels);
  61         return ret;
  62 }
  63
  64 /* Fade to new volume in fade_time seconds. */
  65 static int fade(struct mixer *m, struct mixer_handle *h, int new_vol, int fade_time)
  66 {
  67         int vol, diff, incr, ret;
  68         unsigned secs;
  69         struct timespec ts;
  70         unsigned long long tmp, tmp2; /* Careful with that axe, Eugene! */
  71
  72         if (fade_time <= 0)
  73                 return m->set(h, new_vol);
  74         secs = fade_time;
  75         ret = m->get(h);
  76         if (ret < 0)
  77                 goto out;
  78         vol = ret;
  79         PARA_NOTICE_LOG("fading %s from %d to %d in %d seconds\n",
  80                 conf.mixer_channel_arg, vol, new_vol, secs);
  81         diff = new_vol - vol;
  82         if (!diff) {
  83                 sleep(secs);
  84                 goto out;
  85         }
  86         incr = diff > 0? 1: -1;
  87         diff = diff > 0? diff: -diff;
  88         tmp = secs * 1000 / diff;
  89         tmp2 = tmp % 1000;
  90         while ((new_vol - vol) * incr > 0) {
  91                 ts.tv_nsec = tmp2 * 1000000; /* really nec ?*/
  92                 ts.tv_sec = tmp / 1000; /* really nec ?*/
  93                 //printf("ts.tv_sec: %i\n", ts.tv_nsec);
  94                 vol += incr;
  95                 ret = m->set(h, vol);
  96                 if (ret < 0)
  97                         goto out;
  98                 //printf("vol = %i\n", vol);
  99                 nanosleep(&ts, NULL);
 100         }
 101 out:
 102         return ret;
 103 }
 104
 105 static void client_cmd(const char *cmd)
 106 {
 107         int ret, status, fds[3] = {0, 0, 0};
 108         pid_t pid;
 109         char *cmdline = make_message(BINDIR "/para_client %s", cmd);
 110
 111         PARA_NOTICE_LOG("%s\n", cmdline);
 112         ret = para_exec_cmdline_pid(&pid, cmdline, fds);
 113         free(cmdline);
 114         if (ret < 0) {
 115                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 116                 goto fail;
 117         }
 118         do
 119                 pid = waitpid(pid, &status, 0);
 120         while (pid == -1 && errno == EINTR);
 121         if (pid < 0) {
 122                 PARA_ERROR_LOG("%s\n", strerror(errno));
 123                 goto fail;
 124         }
 125         if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
 126                 goto fail;
 127         return;
 128 fail:
 129         PARA_EMERG_LOG("command \"%s\" failed\n", cmd);
 130         exit(EXIT_FAILURE);
 131 }
 132
 133 static void change_afs_mode_and_play(char *afs_mode)
 134 {
 135         char *cmd;
 136
 137         client_cmd("stop");
 138         if (!afs_mode)
 139                 return;
 140         cmd = make_message("select %s", afs_mode);
 141         client_cmd(cmd);
 142         free(cmd);
 143         client_cmd("play");
 144 }
 145
 146 static int set_initial_volume(struct mixer *m, struct mixer_handle *h)
 147 {
 148         int i, ret;
 149
 150         for (i = 0; i < conf.ivol_given; i++) {
 151                 char *p, *ch, *arg = para_strdup(conf.ivol_arg[i]);
 152                 int32_t iv;
 153                 p = strchr(arg, ':');
 154                 if (p) {
 155                         *p = '\0';
 156                         p++;
 157                         ch = arg;
 158                 } else {
 159                         p = arg;
 160                         ch = NULL;
 161                 }
 162                 ret = para_atoi32(p, &iv);
 163                 if (ret < 0) {
 164                         free(arg);
 165                         return ret;
 166                 }
 167                 ret = set_channel(m, h, ch);
 168                 if (!ch)
 169                         ch = "default";
 170                 if (ret < 0) {
 171                         PARA_WARNING_LOG("ignoring channel %s\n", ch);
 172                         ret = 0;
 173                 } else {
 174                         PARA_INFO_LOG("initial volume %s: %d\n", ch, iv);
 175                         ret = m->set(h, iv);
 176                 }
 177                 free(arg);
 178                 if (ret < 0)
 179                         return ret;
 180         }
 181         return 1;
 182 }
 183
 184 static int sweet_dreams(struct mixer *m, struct mixer_handle *h)
 185 {
 186         time_t t1, wake_time_epoch;
 187         unsigned int delay;
 188         struct tm *tm;
 189         int ret, min = conf.wake_min_arg;
 190         char *fo_mood = conf.fo_mood_arg;
 191         char *fi_mood = conf.fi_mood_arg;
 192         char *sleep_mood = conf.sleep_mood_arg;
 193         int fit = conf.fi_time_arg;
 194         int fot = conf.fo_time_arg;
 195         int fiv = conf.fi_vol_arg;
 196         int fov = conf.fo_vol_arg;
 197
 198         /* calculate wake time */
 199         time(&t1);
 200         if (conf.wake_hour_given) {
 201                 int hour = conf.wake_hour_arg;
 202                 tm = localtime(&t1);
 203                 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
 204                         t1 += 86400; /* wake time is tomorrow */
 205                         tm = localtime(&t1);
 206                 }
 207                 tm->tm_hour = hour;
 208                 tm->tm_min = min;
 209                 tm->tm_sec = 0;
 210         } else {
 211                 t1 += 9 * 60 * 60; /* nine hours from now */
 212                 PARA_INFO_LOG("default wake time: %lu\n", (long unsigned)t1);
 213                 tm = localtime(&t1);
 214         }
 215         wake_time_epoch = mktime(tm);
 216         PARA_INFO_LOG("waketime: %s", asctime(tm));
 217         client_cmd("stop");
 218         sleep(1);
 219         if (fot) {
 220                 ret = set_initial_volume(m, h);
 221                 if (ret < 0)
 222                         return ret;
 223                 change_afs_mode_and_play(fo_mood);
 224                 ret = set_channel(m, h, conf.mixer_channel_arg);
 225                 if (ret < 0)
 226                         return ret;
 227                 ret = fade(m, h, fov, fot);
 228                 if (ret < 0)
 229                         return ret;
 230         } else {
 231                 ret = m->set(h, fov);
 232                 if (ret < 0)
 233                         return ret;
 234         }
 235         if (conf.sleep_mood_given)
 236                 change_afs_mode_and_play(sleep_mood);
 237         else
 238                 client_cmd("stop");
 239         if (!fit)
 240                 return 1;
 241         for (;;) {
 242                 time(&t1);
 243                 if (wake_time_epoch <= t1 + fit)
 244                         break;
 245                 delay = wake_time_epoch - t1 - fit;
 246                 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
 247                         delay, delay / 3600,
 248                         (delay % 3600) / 60);
 249                 sleep(delay);
 250         }
 251         change_afs_mode_and_play(fi_mood);
 252         ret = fade(m, h, fiv, fit);
 253         PARA_INFO_LOG("fade complete, returning\n");
 254         return ret;
 255 }
 256
 257 static int snooze(struct mixer *m, struct mixer_handle *h)
 258 {
 259         int ret, val;
 260
 261         if (conf.so_time_arg <= 0)
 262                 return 1;
 263         ret = m->get(h);
 264         if (ret < 0)
 265                 return ret;
 266         val = ret;
 267         if (val < conf.so_vol_arg)
 268                 ret = m->set(h, conf.so_vol_arg);
 269         else
 270                 ret = fade(m, h, conf.so_vol_arg, conf.so_time_arg);
 271         if (ret < 0)
 272                 return ret;
 273         client_cmd("pause");
 274         PARA_NOTICE_LOG("%d seconds snooze time...\n", conf.snooze_time_arg);
 275         sleep(conf.snooze_time_arg);
 276         client_cmd("play");
 277         return fade(m, h, conf.si_vol_arg, conf.si_time_arg);
 278 }
 279
 280 static int configfile_exists(void)
 281 {
 282         static char *config_file;
 283
 284         if (!conf.config_file_given) {
 285                 char *home = para_homedir();
 286                 free(config_file);
 287                 config_file = make_message("%s/.paraslash/fade.conf", home);
 288                 free(home);
 289                 conf.config_file_arg = config_file;
 290         }
 291         return file_exists(conf.config_file_arg);
 292 }
 293
 294 static void init_mixers(void)
 295 {
 296         int i;
 297
 298         FOR_EACH_MIXER(i) {
 299                 struct mixer *m = &supported_mixer[i];
 300                 PARA_DEBUG_LOG("initializing mixer API #%d (%s)\n",
 301                         i, mixer_name[i]);
 302                 m->init(m);
 303         }
 304 }
 305
 306 static int set_val(struct mixer *m, struct mixer_handle *h)
 307 {
 308         return m->set(h, conf.val_arg);
 309 }
 310
 311 static struct mixer *get_mixer_or_die(void)
 312 {
 313         int i;
 314
 315         if (!conf.mixer_api_given)
 316                 i = DEFAULT_MIXER;
 317         else
 318                 FOR_EACH_MIXER(i)
 319                         if (!strcmp(mixer_name[i], conf.mixer_api_arg))
 320                                 break;
 321         if (i < NUM_SUPPORTED_MIXERS) {
 322                 PARA_NOTICE_LOG("using %s mixer API\n", mixer_name[i]);
 323                 return supported_mixer + i;
 324         }
 325         printf("available mixer APIs: ");
 326         FOR_EACH_MIXER(i) {
 327                 int d = (i == DEFAULT_MIXER);
 328                 printf("%s%s%s ", d? "[" : "", mixer_name[i], d? "]" : "");
 329         }
 330         printf("\n");
 331         exit(EXIT_FAILURE);
 332 }
 333
 334 __noreturn static void print_help_and_die(void)
 335 {
 336         struct ggo_help h = DEFINE_GGO_HELP(fade);
 337         bool d = conf.detailed_help_given;
 338
 339         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
 340         exit(0);
 341 }
 342
 343 int main(int argc, char *argv[])
 344 {
 345         int ret;
 346         struct mixer *m;
 347         struct mixer_handle *h = NULL;
 348
 349         fade_cmdline_parser(argc, argv, &conf);
 350         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 351         version_handle_flag("fade", conf.version_given);
 352         if (conf.help_given || conf.detailed_help_given)
 353                 print_help_and_die();
 354         ret = configfile_exists();
 355         if (!ret && conf.config_file_given) {
 356                 PARA_EMERG_LOG("can not read config file %s\n",
 357                         conf.config_file_arg);
 358                 exit(EXIT_FAILURE);
 359         }
 360         if (ret) {
 361                 struct fade_cmdline_parser_params params = {
 362                         .override = 0,
 363                         .initialize = 0,
 364                         .check_required = 0,
 365                         .check_ambiguity = 0,
 366                         .print_errors = 1
 367                 };
 368                 fade_cmdline_parser_config_file(conf.config_file_arg,
 369                         &conf, &params);
 370                 loglevel = get_loglevel_by_name(conf.loglevel_arg);
 371         }
 372         init_mixers();
 373         m = get_mixer_or_die();
 374         ret = m->open(conf.mixer_device_arg, &h);
 375         if (ret < 0)
 376                 goto out;
 377         ret = set_channel(m, h, conf.mixer_channel_arg);
 378         if (ret < 0)
 379                 goto out;
 380         switch (conf.mode_arg) {
 381         case mode_arg_fade:
 382                 ret = fade(m, h, conf.fade_vol_arg, conf.fade_time_arg);
 383                 break;
 384         case mode_arg_snooze:
 385                 ret = snooze(m, h);
 386                 break;
 387         case mode_arg_set:
 388                 ret = set_val(m, h);
 389                 break;
 390         default: /* sleep mode */
 391                 ret = sweet_dreams(m, h);
 392                 break;
 393         }
 394 out:
 395         m->close(&h);
 396         if (ret < 0)
 397                 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
 398         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 399 }