fade.c

   1 /*
   2  * Copyright (C) 1998-2005 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 <ctype.h>
  26 #include <curses.h>
  27 #include <stdlib.h> /* EXIT_SUCCESS */
  28 #include <unistd.h>
  29 #include <signal.h>
  30 #include <string.h>
  31 #include <limits.h>
  32 #include <linux/soundcard.h>
  33 #include "string.h"
  34
  35
  36 struct gengetopt_args_info args_info;
  37
  38 void para_log(__unused int ll, const char *fmt,...)
  39 {
  40         va_list argp;
  41         time_t t1;
  42         struct tm *tm;
  43
  44         time(&t1);
  45         tm = localtime(&t1);
  46         printf("%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
  47         va_start(argp, fmt);
  48         vprintf(fmt, argp);
  49         va_end(argp);
  50 }
  51
  52 /*
  53  * open mixer device
  54  */
  55 static int open_mixer(void)
  56 {
  57         int mixer_fd;
  58
  59         if ((mixer_fd = open(args_info.mixer_device_arg, O_RDWR, 0)) < 0)
  60                 return -1;
  61         return mixer_fd;
  62 }
  63
  64 /*
  65  * get volume via mixer_fd
  66  */
  67 static int do_get_vol(int mixer_fd)
  68 {
  69         int volume;
  70
  71         if (ioctl(mixer_fd, MIXER_READ(SOUND_MIXER_VOLUME), &volume) < 0)
  72                 return -1;
  73         /* take the mean value of left and right volume */
  74         return (volume % 256 + (volume >> 8)) / 2;
  75 }
  76
  77 /*
  78  * open mixer, get volume and close mixer
  79  */
  80 static int get_vol(void)
  81 {
  82         int mixer_fd;
  83         int volume;
  84
  85         mixer_fd = open_mixer();
  86         if (mixer_fd < 0)
  87                 return -1;
  88         volume = do_get_vol(mixer_fd);
  89         close(mixer_fd);
  90         return volume;
  91 }
  92
  93 /*
  94  * set volume via mixer_fd
  95  */
  96 static int do_set_vol(int mixer_fd, int volume)
  97 {
  98         int tmp;
  99         tmp = (volume << 8) + volume;
 100         if (ioctl(mixer_fd, MIXER_WRITE(SOUND_MIXER_VOLUME), &tmp) < 0)
 101                 return 0;
 102         return 1;
 103 }
 104
 105 /*
 106  * open mixer, set volume and close mixer
 107  */
 108 static int set_vol(int volume)
 109 {
 110         int mixer_fd;
 111         int ret;
 112
 113         mixer_fd = open_mixer();
 114         ret = 0;
 115         if (mixer_fd < 0)
 116                 goto out;
 117         if (!do_set_vol(mixer_fd, volume))
 118                 goto out;
 119         ret = 1;
 120         close(mixer_fd);
 121 out:
 122         return ret;
 123 }
 124
 125 /*
 126  * Open mixer, get volume, fade to new_vol in secs seconds and
 127  * close mixer
 128  */
 129 static int fade(int new_vol, unsigned int secs)
 130 {
 131         int vol, mixer_fd = -1, diff, incr, ret;
 132         struct timespec ts;
 133         unsigned long long tmp, tmp2; /* Careful with that axe, Eugene! */
 134
 135         PARA_NOTICE_LOG("fading to %d in %d seconds\n", new_vol, secs);
 136         ret = 0;
 137         if (!secs)
 138                 goto out;
 139         mixer_fd = open_mixer();
 140         if (mixer_fd < 0)
 141                 goto out;
 142         vol = do_get_vol(mixer_fd);
 143         if (vol < 0)
 144                 goto out;
 145         diff = new_vol - vol;
 146         if (!diff) {
 147                 sleep(secs);
 148                 ret = 1;
 149                 goto out;
 150         }
 151         incr = diff > 0? 1: -1;
 152         diff = diff > 0? diff: -diff;
 153         tmp = secs * 1000 / diff;
 154         tmp2 = tmp % 1000;
 155         while ((new_vol - vol) * incr > 0) {
 156                 ts.tv_nsec = tmp2 * 1000000; /* really nec ?*/
 157                 ts.tv_sec = tmp / 1000; /* really nec ?*/
 158                 //printf("ts.tv_sec: %i\n", ts.tv_nsec);
 159                 vol += incr;
 160                 if (!do_set_vol(mixer_fd, vol))
 161                         goto out;
 162                 //printf("vol = %i\n", vol);
 163                 nanosleep(&ts, NULL);
 164         }
 165 out:
 166         if (mixer_fd >= 0)
 167                 close(mixer_fd);
 168         return 1;
 169 }
 170
 171 static int client_cmd(const char *cmd,...)
 172 {
 173         int ret, fds[3] = {0, 0, 0};
 174         pid_t pid;
 175         char *cmdline = make_message(BINDIR "/para_client %s", cmd);
 176         PARA_INFO_LOG("%s", cmdline);
 177         ret = para_exec_cmdline_pid(&pid, cmdline, fds);
 178         free(cmdline);
 179         return ret;
 180 }
 181
 182 /*
 183  * sleep
 184  */
 185 static void sweet_dreams(void)
 186 {
 187         time_t t1, wake_time_epoch;
 188         unsigned int delay;
 189         struct tm *tm;
 190         int hour = args_info.wake_hour_arg;
 191         int min = args_info.wake_min_arg;
 192         char *fa_stream = args_info.fa_stream_arg;
 193         char *wake_stream = args_info.wake_stream_arg;
 194         //char *current_stream = stat_items[STREAM].content;
 195         int wf = args_info.wake_fade_arg;
 196         int sf = args_info.fa_fade_arg;
 197         int wv = args_info.wake_vol_arg;
 198         int sv = args_info.fa_vol_arg;
 199         int iv = args_info.sleep_ivol_arg;
 200         char *cmd, *sleep_stream = args_info.sleep_stream_given?
 201                 args_info.sleep_stream_arg : NULL;
 202
 203         if (sf) {
 204                 PARA_INFO_LOG("initial volume: %d\n", iv);
 205                 set_vol(iv);
 206                 cmd = make_message("csp %s\n", fa_stream);
 207                 client_cmd(cmd);
 208                 free(cmd);
 209                 fade(sv, sf);
 210         }
 211         if (sleep_stream) {
 212                 cmd = make_message("csp %s\n", sleep_stream);
 213                 client_cmd(cmd);
 214                 free(cmd);
 215         } else
 216                 client_cmd("stop");
 217         if (!wf)
 218                 return;
 219         /* calculate wake time */
 220         time(&t1);
 221         tm = localtime(&t1);
 222         if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
 223                 /* wake time is tomorrow */
 224                 t1 += 86400;
 225                 tm = localtime(&t1);
 226                 t1 -= 86400;
 227         }
 228         tm->tm_hour = hour;
 229         tm->tm_min = min;
 230         tm->tm_sec = 0;
 231         wake_time_epoch = mktime(tm);
 232         PARA_INFO_LOG("waketime: %s", asctime(tm));
 233         while (wake_time_epoch > t1 + wf) {
 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                 time(&t1);
 240         }
 241         cmd = make_message("csp %s\n", wake_stream);
 242         client_cmd(cmd);
 243         free(cmd);
 244         fade(wv, wf);
 245         PARA_INFO_LOG("%s", "fade complete, returning\n");
 246 }
 247
 248 static void snooze(void)
 249 {
 250         if (get_vol() < args_info.snooze_out_vol_arg)
 251                 set_vol(args_info.snooze_out_vol_arg);
 252         else
 253                 fade(args_info.snooze_out_vol_arg, args_info.snooze_out_fade_arg);
 254         client_cmd("pause");
 255         PARA_NOTICE_LOG("%d seconds snooze time...\n", args_info.snooze_time_arg);
 256         sleep(args_info.snooze_time_arg);
 257         client_cmd("play");
 258         fade(args_info.snooze_in_vol_arg, args_info.snooze_in_fade_arg);
 259 }
 260
 261 static int configfile_exists(void)
 262 {
 263         static char *config_file;
 264
 265         if (!args_info.config_file_given) {
 266                 char *home = para_homedir();
 267                 const char *conf = ".paraslash/fade.conf";
 268                 free(config_file);
 269                 config_file = make_message("%s/%s", home, conf);
 270                 free(home);
 271                 args_info.config_file_arg = config_file;
 272         }
 273         return file_exists(args_info.config_file_arg);
 274 }
 275
 276
 277 int main(int argc, char *argv[])
 278 {
 279         int ret;
 280
 281         if (cmdline_parser(argc, argv, &args_info))
 282                 exit(EXIT_FAILURE);
 283         ret = configfile_exists();
 284         if (!ret && args_info.config_file_given) {
 285                 PARA_EMERG_LOG("can not read config file %s\n",
 286                         args_info.config_file_arg);
 287                 exit(EXIT_FAILURE);
 288         }
 289         if (ret)
 290                 cmdline_parser_configfile(args_info.config_file_arg,
 291                         &args_info, 0, 0, 0);
 292         if ((ret = open_mixer()) < 0) {
 293                 PARA_EMERG_LOG("can not open mixer device %s.",
 294                         args_info.mixer_device_arg);
 295                 exit(EXIT_FAILURE);
 296         } else
 297                 close(ret);
 298         ret = 0;
 299         setlinebuf(stdout);
 300         if (!strcmp(args_info.mode_arg, "sleep")) {
 301                 sweet_dreams();
 302                 goto out;
 303         }
 304         if (!strcmp(args_info.mode_arg, "fade")) {
 305                 fade(args_info.fade_vol_arg, args_info.fade_time_arg);
 306                 goto out;
 307         }
 308         if (!strcmp(args_info.mode_arg, "snooze")) {
 309                 snooze();
 310                 goto out;
 311         }
 312         ret = -1;
 313 out:
 314         return ret;
 315 }