fade.c: simplify open_mixer()
[paraslash.git] / 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 }