fade.c

   1 /*
   2  * Copyright (C) 1998-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     This program is distributed in the hope that it will be useful,
  10  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *     GNU General Public License for more details.
  13  *
  14  *     You should have received a copy of the GNU General Public License
  15  *     along with this program; if not, write to the Free Software
  16  *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  17  */
  18
  19 /** \file fade.c a volume fader and alarm clock */
  20
  21 #include "fade.cmdline.h"
  22 #include "para.h"
  23 #include "fd.h"
  24
  25 #include <stropts.h>
  26 #include <ctype.h>
  27 #include <curses.h>
  28 #include <stdlib.h> /* EXIT_SUCCESS */
  29 #include <unistd.h>
  30 #include <signal.h>
  31 #include <string.h>
  32 #include <limits.h>
  33 #include <linux/soundcard.h>
  34 #include "string.h"
  35
  36
  37 struct fade_args_info conf;
  38
  39 void para_log(__a_unused int ll, const char *fmt,...)
  40 {
  41         va_list argp;
  42         time_t t1;
  43         struct tm *tm;
  44
  45         time(&t1);
  46         tm = localtime(&t1);
  47         printf("%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
  48         va_start(argp, fmt);
  49         vprintf(fmt, argp);
  50         va_end(argp);
  51 }
  52
  53 /*
  54  * open mixer device
  55  */
  56 static int open_mixer(void)
  57 {
  58         return open(conf.mixer_device_arg, O_RDWR, 0);
  59 }
  60
  61 /*
  62  * get volume via mixer_fd
  63  */
  64 static int do_get_vol(int mixer_fd)
  65 {
  66         int volume;
  67
  68         if (ioctl(mixer_fd, MIXER_READ(SOUND_MIXER_VOLUME), &volume) < 0)
  69                 return -1;
  70         /* take the mean value of left and right volume */
  71         return (volume % 256 + (volume >> 8)) / 2;
  72 }
  73
  74 /*
  75  * open mixer, get volume and close mixer
  76  */
  77 static int get_vol(void)
  78 {
  79         int mixer_fd;
  80         int volume;
  81
  82         mixer_fd = open_mixer();
  83         if (mixer_fd < 0)
  84                 return -1;
  85         volume = do_get_vol(mixer_fd);
  86         close(mixer_fd);
  87         return volume;
  88 }
  89
  90 /*
  91  * set volume via mixer_fd
  92  */
  93 static int do_set_vol(int mixer_fd, int volume)
  94 {
  95         int tmp;
  96         tmp = (volume << 8) + volume;
  97         if (ioctl(mixer_fd, MIXER_WRITE(SOUND_MIXER_VOLUME), &tmp) < 0)
  98                 return 0;
  99         return 1;
 100 }
 101
 102 /*
 103  * open mixer, set volume and close mixer
 104  */
 105 static int set_vol(int volume)
 106 {
 107         int mixer_fd;
 108         int ret;
 109
 110         mixer_fd = open_mixer();
 111         ret = 0;
 112         if (mixer_fd < 0)
 113                 goto out;
 114         if (!do_set_vol(mixer_fd, volume))
 115                 goto out;
 116         ret = 1;
 117         close(mixer_fd);
 118 out:
 119         return ret;
 120 }
 121
 122 /*
 123  * Open mixer, get volume, fade to new_vol in secs seconds and
 124  * close mixer
 125  */
 126 static void fade(int new_vol, int fade_time)
 127 {
 128         int vol, mixer_fd = -1, diff, incr;
 129         unsigned secs;
 130         struct timespec ts;
 131         unsigned long long tmp, tmp2; /* Careful with that axe, Eugene! */
 132
 133         if (fade_time <= 0)
 134                 goto out;
 135         secs = fade_time;
 136         PARA_NOTICE_LOG("fading to %d in %d seconds\n", new_vol, secs);
 137         mixer_fd = open_mixer();
 138         if (mixer_fd < 0)
 139                 goto out;
 140         vol = do_get_vol(mixer_fd);
 141         if (vol < 0)
 142                 goto out;
 143         diff = new_vol - vol;
 144         if (!diff) {
 145                 sleep(secs);
 146                 goto out;
 147         }
 148         incr = diff > 0? 1: -1;
 149         diff = diff > 0? diff: -diff;
 150         tmp = secs * 1000 / diff;
 151         tmp2 = tmp % 1000;
 152         while ((new_vol - vol) * incr > 0) {
 153                 ts.tv_nsec = tmp2 * 1000000; /* really nec ?*/
 154                 ts.tv_sec = tmp / 1000; /* really nec ?*/
 155                 //printf("ts.tv_sec: %i\n", ts.tv_nsec);
 156                 vol += incr;
 157                 if (!do_set_vol(mixer_fd, vol))
 158                         goto out;
 159                 //printf("vol = %i\n", vol);
 160                 nanosleep(&ts, NULL);
 161         }
 162 out:
 163         if (mixer_fd >= 0)
 164                 close(mixer_fd);
 165 }
 166
 167 static int client_cmd(const char *cmd,...)
 168 {
 169         int ret, fds[3] = {0, 0, 0};
 170         pid_t pid;
 171         char *cmdline = make_message(BINDIR "/para_client %s", cmd);
 172         PARA_INFO_LOG("%s\n", cmdline);
 173         ret = para_exec_cmdline_pid(&pid, cmdline, fds);
 174         free(cmdline);
 175         return ret;
 176 }
 177
 178 /*
 179  * sleep
 180  */
 181 static void sweet_dreams(void)
 182 {
 183         time_t t1, wake_time_epoch;
 184         unsigned int delay;
 185         struct tm *tm;
 186         int min = conf.wake_min_arg;
 187         char *fa_stream = conf.fa_stream_arg;
 188         char *wake_stream = conf.wake_stream_arg;
 189         //char *current_stream = stat_items[STREAM].content;
 190         int wf = conf.wake_fade_arg;
 191         int sf = conf.fa_fade_arg;
 192         int wv = conf.wake_vol_arg;
 193         int sv = conf.fa_vol_arg;
 194         int iv = conf.sleep_ivol_arg;
 195         char *cmd, *sleep_stream = conf.sleep_stream_given?
 196                 conf.sleep_stream_arg : NULL;
 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 += 8 * 60 * 60;
 212                 PARA_INFO_LOG("default wake time: %lu\n", t1);
 213                 tm = localtime(&t1);
 214         }
 215         wake_time_epoch = mktime(tm);
 216         PARA_INFO_LOG("waketime: %s", asctime(tm));
 217         if (sf) {
 218                 PARA_INFO_LOG("initial volume: %d\n", iv);
 219                 set_vol(iv);
 220                 cmd = make_message("csp %s\n", fa_stream);
 221                 client_cmd(cmd);
 222                 free(cmd);
 223                 fade(sv, sf);
 224         }
 225         if (sleep_stream) {
 226                 cmd = make_message("csp %s\n", sleep_stream);
 227                 client_cmd(cmd);
 228                 free(cmd);
 229         } else
 230                 client_cmd("stop");
 231         if (!wf)
 232                 return;
 233         for (;;) {
 234                 time(&t1);
 235                 if (wake_time_epoch <= t1 + wf)
 236                         break;
 237                 delay = wake_time_epoch - t1 - wf;
 238                 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
 239                         delay, delay / 3600,
 240                         (delay % 3600) / 60);
 241                 sleep(delay);
 242         }
 243         cmd = make_message("csp %s\n", wake_stream);
 244         client_cmd(cmd);
 245         free(cmd);
 246         fade(wv, wf);
 247         PARA_INFO_LOG("%s", "fade complete, returning\n");
 248 }
 249
 250 static void snooze(void)
 251 {
 252         unsigned sleep_time;
 253
 254         if (conf.snooze_time_arg <= 0)
 255                 return;
 256         sleep_time = conf.snooze_time_arg;
 257         if (get_vol() < conf.snooze_out_vol_arg)
 258                 set_vol(conf.snooze_out_vol_arg);
 259         else
 260                 fade(conf.snooze_out_vol_arg, conf.snooze_out_fade_arg);
 261         client_cmd("pause");
 262         PARA_NOTICE_LOG("%d seconds snooze time...\n", conf.snooze_time_arg);
 263         sleep(sleep_time);
 264         client_cmd("play");
 265         fade(conf.snooze_in_vol_arg, conf.snooze_in_fade_arg);
 266 }
 267
 268 static int configfile_exists(void)
 269 {
 270         static char *config_file;
 271
 272         if (!conf.config_file_given) {
 273                 char *home = para_homedir();
 274                 free(config_file);
 275                 config_file = make_message("%s/.paraslash/fade.conf", home);
 276                 free(home);
 277                 conf.config_file_arg = config_file;
 278         }
 279         return file_exists(conf.config_file_arg);
 280 }
 281
 282
 283 int main(int argc, char *argv[])
 284 {
 285         int ret;
 286
 287         if (fade_cmdline_parser(argc, argv, &conf))
 288                 exit(EXIT_FAILURE);
 289         HANDLE_VERSION_FLAG("fade", conf);
 290         ret = configfile_exists();
 291         if (!ret && conf.config_file_given) {
 292                 PARA_EMERG_LOG("can not read config file %s\n",
 293                         conf.config_file_arg);
 294                 exit(EXIT_FAILURE);
 295         }
 296         if (ret)
 297                 fade_cmdline_parser_configfile(conf.config_file_arg,
 298                         &conf, 0, 0, 0);
 299         if ((ret = open_mixer()) < 0) {
 300                 PARA_EMERG_LOG("can not open mixer device %s.",
 301                         conf.mixer_device_arg);
 302                 exit(EXIT_FAILURE);
 303         } else
 304                 close(ret);
 305         ret = 0;
 306         setlinebuf(stdout);
 307         if (!strcmp(conf.mode_arg, "sleep")) {
 308                 sweet_dreams();
 309                 goto out;
 310         }
 311         if (!strcmp(conf.mode_arg, "fade")) {
 312                 fade(conf.fade_vol_arg, conf.fade_time_arg);
 313                 goto out;
 314         }
 315         if (!strcmp(conf.mode_arg, "snooze")) {
 316                 snooze();
 317                 goto out;
 318         }
 319         ret = -1;
 320 out:
 321         return ret;
 322 }