1 /* Copyright (C) 1998 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
3 /** \file mixer.c A volume fader and alarm clock for OSS. */
17 /** Array of error strings. */
20 /* At least one of the two is defined if this file gets compiled. */
21 static const struct mixer *mixers[] = {
30 #define NUM_SUPPORTED_MIXERS (ARRAY_SIZE(mixers))
31 #define FOR_EACH_MIXER(i) for ((i) = 0; (i) < NUM_SUPPORTED_MIXERS; (i)++)
33 static struct lls_parse_result *lpr, *sub_lpr;
35 #define CMD_PTR(_cmd) (lls_cmd(LSG_MIXER_CMD_ ## _cmd, mixer_suite))
36 #define OPT_RESULT(_cmd, _opt) (lls_opt_result( \
37 LSG_MIXER_ ## _cmd ## _OPT_ ## _opt, (LSG_MIXER_CMD_ ## _cmd == 0)? lpr : sub_lpr))
38 #define OPT_GIVEN(_cmd, _opt) (lls_opt_given(OPT_RESULT(_cmd, _opt)))
39 #define OPT_STRING_VAL(_cmd, _opt) (lls_string_val(0, OPT_RESULT(_cmd, _opt)))
40 #define OPT_UINT32_VAL(_cmd, _opt) (lls_uint32_val(0, OPT_RESULT(_cmd, _opt)))
42 typedef int (*mixer_subcommand_handler_t)(const struct mixer *, struct mixer_handle *);
44 #define EXPORT_CMD(_cmd) const mixer_subcommand_handler_t \
45 lsg_mixer_com_ ## _cmd ## _user_data = &com_ ## _cmd;
48 static __printf_2_3 void date_log(int ll, const char *fmt, ...)
58 fprintf(stderr, "%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
63 __printf_2_3 void (*para_log)(int, const char*, ...) = date_log;
65 static int set_channel(const struct mixer *m, struct mixer_handle *h,
69 PARA_NOTICE_LOG("using %s mixer channel\n", channel?
71 return m->set_channel(h, channel);
74 static void millisleep(int ms)
78 PARA_INFO_LOG("sleeping %dms\n", ms);
81 ts.tv_sec = ms / 1000,
82 ts.tv_nsec = (ms % 1000) * 1000 * 1000;
87 * This implements the inverse function of t -> t^alpha, scaled to the time
88 * interval [0,T] and the range given by old_vol and new_vol. It returns the
89 * amount of milliseconds until the given volume is reached.
91 static unsigned volume_time(double vol, double old_vol, double new_vol,
92 double T, double alpha)
96 if (old_vol < new_vol) {
104 x = T * exp(log(((vol - c) / (d - c))) / alpha);
106 if (old_vol < new_vol)
112 /* Fade to new volume in fade_time seconds. */
113 static int fade(const struct mixer *m, struct mixer_handle *h, uint32_t new_vol,
116 int i, T, old_vol, ret, slept, incr;
118 uint32_t fe = OPT_UINT32_VAL(PARA_MIXER, FADE_EXPONENT);
120 if (fade_time <= 0 || fe >= 100) {
121 ret = m->set(h, new_vol);
126 alpha = (100 - fe) / 100.0;
131 if (old_vol == new_vol)
133 PARA_NOTICE_LOG("fading %s from %d to %u in %u seconds\n",
134 OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL), old_vol,
136 incr = old_vol < new_vol? 1 : -1;
137 T = fade_time * 1000;
141 ms = volume_time(i + incr, old_vol, new_vol, T, alpha);
142 millisleep(ms - slept);
148 } while (i != new_vol);
155 static int com_fade(const struct mixer *m, struct mixer_handle *h)
157 uint32_t new_vol = OPT_UINT32_VAL(FADE, FADE_VOL);
158 uint32_t fade_time = OPT_UINT32_VAL(FADE, FADE_TIME);
159 return fade(m, h, new_vol, fade_time);
163 static void client_cmd(const char *cmd)
165 int ret, status, fds[3] = {0, 0, 0};
167 char *cmdline = make_message(BINDIR "/para_client %s", cmd);
169 PARA_NOTICE_LOG("%s\n", cmdline);
170 ret = para_exec_cmdline_pid(&pid, cmdline, fds);
173 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
177 pid = waitpid(pid, &status, 0);
178 while (pid == -1 && errno == EINTR);
180 PARA_ERROR_LOG("%s\n", strerror(errno));
183 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
187 PARA_EMERG_LOG("command \"%s\" failed\n", cmd);
191 static void change_afs_mode(const char *afs_mode)
195 cmd = make_message("select %s", afs_mode);
200 static int set_initial_volume(const struct mixer *m, struct mixer_handle *h)
204 for (i = 0; i < OPT_GIVEN(SLEEP, IVOL); i++) {
205 const char *val = lls_string_val(i, OPT_RESULT(SLEEP, IVOL));
206 char *p, *ch, *arg = para_strdup(val);
208 p = strchr(arg, ':');
217 ret = para_atoi32(p, &iv);
222 ret = set_channel(m, h, ch);
226 PARA_WARNING_LOG("ignoring channel %s\n", ch);
229 PARA_INFO_LOG("initial volume %s: %d\n", ch, iv);
239 static int com_sleep(const struct mixer *m, struct mixer_handle *h)
241 time_t t1, wake_time_epoch;
245 const char *wake_time = OPT_STRING_VAL(SLEEP, WAKE_TIME);
246 const char *fo_mood = OPT_STRING_VAL(SLEEP, FO_MOOD);
247 const char *fi_mood = OPT_STRING_VAL(SLEEP, FI_MOOD);
248 const char *sleep_mood = OPT_STRING_VAL(SLEEP, SLEEP_MOOD);
249 int fit = OPT_UINT32_VAL(SLEEP, FI_TIME);
250 int fot = OPT_UINT32_VAL(SLEEP, FO_TIME);
251 int fiv = OPT_UINT32_VAL(SLEEP, FI_VOL);
252 int fov = OPT_UINT32_VAL(SLEEP, FO_VOL);
253 int32_t hour, min = 0;
255 char *wt = para_strdup(wake_time + (wake_time[0] == '+'));
257 /* calculate wake time */
259 tmp = strchr(wt, ':');
263 ret = para_atoi32(tmp, &min);
269 ret = para_atoi32(wt, &hour);
273 if (wake_time[0] == '+') { /* relative */
274 t1 += hour * 60 * 60 + min * 60;
278 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
279 t1 += 86400; /* wake time is tomorrow */
286 wake_time_epoch = mktime(tm);
287 PARA_INFO_LOG("waketime: %d:%02d\n", tm->tm_hour, tm->tm_min);
290 if (fot && fo_mood) {
291 ret = set_initial_volume(m, h);
294 change_afs_mode(fo_mood);
296 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
299 ret = fade(m, h, fov, fot);
303 ret = m->set(h, fov);
308 change_afs_mode(sleep_mood);
309 if (!fot || !fo_mood) /* currently stopped */
311 } else if (fot && fo_mood) /* currently playing */
313 if (!fit || !fi_mood) /* nothing to do */
315 change_afs_mode(fi_mood);
318 if (wake_time_epoch <= t1 + fit)
320 delay = wake_time_epoch - t1 - fit;
321 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
323 (delay % 3600) / 60);
327 ret = fade(m, h, fiv, fit);
328 PARA_INFO_LOG("fade complete, returning\n");
333 static int com_snooze(const struct mixer *m, struct mixer_handle *h)
337 if (OPT_UINT32_VAL(SNOOZE, SO_TIME) == 0)
343 if (val < OPT_UINT32_VAL(SNOOZE, SO_VOL))
344 ret = m->set(h, OPT_UINT32_VAL(SNOOZE, SO_VOL));
346 ret = fade(m, h, OPT_UINT32_VAL(SNOOZE, SO_VOL),
347 OPT_UINT32_VAL(SNOOZE, SO_TIME));
351 PARA_NOTICE_LOG("%" PRIu32 " seconds snooze time...\n",
352 OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
353 sleep(OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
355 return fade(m, h, OPT_UINT32_VAL(SNOOZE, SI_VOL),
356 OPT_UINT32_VAL(SNOOZE, SI_TIME));
360 static int com_set(const struct mixer *m, struct mixer_handle *h)
362 return m->set(h, OPT_UINT32_VAL(SET, VAL));
366 static const struct mixer *get_mixer_or_die(void)
370 if (!OPT_GIVEN(PARA_MIXER, MIXER_API))
371 i = 0; /* default: use first mixer */
374 if (!strcmp(mixers[i]->name,
375 OPT_STRING_VAL(PARA_MIXER, MIXER_API)))
377 if (i < NUM_SUPPORTED_MIXERS) {
378 PARA_NOTICE_LOG("using %s mixer API\n", mixers[i]->name);
381 printf("available mixer APIs: ");
383 printf("%s%s%s ", i == 0? "[" : "", mixers[i]->name,
389 static void show_subcommands(void)
391 const struct lls_command *cmd;
393 printf("Subcommands:\n");
394 for (i = 1; (cmd = lls_cmd(i, mixer_suite)); i++) {
395 const char *name = lls_command_name(cmd);
396 const char *purpose = lls_purpose(cmd);
397 printf("%-20s%s\n", name, purpose);
402 static int com_help(__a_unused const struct mixer *m,
403 __a_unused struct mixer_handle *h)
405 const struct lls_command *cmd;
406 const struct lls_opt_result *r_l = OPT_RESULT(HELP, LONG);
411 ret = lls_check_arg_count(sub_lpr, 0, 1, NULL);
414 if (lls_num_inputs(sub_lpr) == 0) {
418 name = lls_input(0, sub_lpr);
419 ret = lls(lls_lookup_subcmd(name, mixer_suite, &errctx));
422 PARA_ERROR_LOG("%s\n", errctx);
426 cmd = lls_cmd(ret, mixer_suite);
427 if (lls_opt_given(r_l))
428 txt = lls_long_help(cmd);
430 txt = lls_short_help(cmd);
437 static void handle_help_flags(void)
441 if (OPT_GIVEN(PARA_MIXER, DETAILED_HELP))
442 help = lls_long_help(CMD_PTR(PARA_MIXER));
443 else if (OPT_GIVEN(PARA_MIXER, HELP))
444 help = lls_short_help(CMD_PTR(PARA_MIXER));
453 static int parse_and_merge_config_file(const struct lls_command *cmd)
458 char *cf, *errctx = NULL;
459 struct lls_parse_result **lprp, *cf_lpr, *merged_lpr;
462 const char *subcmd_name;
464 if (cmd == lls_cmd(0, mixer_suite)) {
469 subcmd_name = lls_command_name(cmd);
471 if (OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
472 cf = para_strdup(OPT_STRING_VAL(PARA_MIXER, CONFIG_FILE));
474 char *home = para_homedir();
475 cf = make_message("%s/.paraslash/mixer.conf", home);
478 ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
480 if (ret != -E_EMPTY && ret != -ERRNO_TO_PARA_ERROR(ENOENT))
482 if (ret == -ERRNO_TO_PARA_ERROR(ENOENT) &&
483 OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
486 ret = lls(lls_convert_config(map, sz, subcmd_name, &cf_argv, &errctx));
487 para_munmap(map, sz);
491 ret = lls(lls_parse(cf_argc, cf_argv, cmd, &cf_lpr, &errctx));
492 lls_free_argv(cf_argv);
495 ret = lls(lls_merge(*lprp, cf_lpr, cmd, &merged_lpr, &errctx));
496 lls_free_parse_result(cf_lpr, cmd);
499 lls_free_parse_result(*lprp, cmd);
501 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
507 PARA_ERROR_LOG("%s\n", errctx);
513 * The main function of para_mixer.
515 * The executable is linked with the alsa or the oss mixer API, or both. It has
516 * a custom log function which prefixes log messages with the current date.
518 * \param argc Argument counter.
519 * \param argv Argument vector.
521 * \return EXIT_SUCCESS or EXIT_FAILURE.
523 int main(int argc, char *argv[])
525 const struct lls_command *cmd = CMD_PTR(PARA_MIXER);
529 const struct mixer *m;
530 struct mixer_handle *h;
533 ret = lls(lls_parse(argc, argv, cmd, &lpr, &errctx));
536 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
537 version_handle_flag("mixer", OPT_GIVEN(PARA_MIXER, VERSION));
540 n = lls_num_inputs(lpr);
546 ret = parse_and_merge_config_file(cmd);
549 subcmd = lls_input(0, lpr);
550 ret = lls(lls_lookup_subcmd(subcmd, mixer_suite, &errctx));
553 cmd = lls_cmd(ret, mixer_suite);
554 ret = lls(lls_parse(n, argv + argc - n, cmd, &sub_lpr, &errctx));
557 ret = parse_and_merge_config_file(cmd);
560 m = get_mixer_or_die();
561 ret = m->open(OPT_STRING_VAL(PARA_MIXER, MIXER_DEVICE), &h);
564 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
565 if (ret == -E_BAD_CHANNEL) {
566 char *channels = m->get_channels(h);
567 printf("Available channels: %s\n", channels);
572 ret = (*(mixer_subcommand_handler_t *)(lls_user_data(cmd)))(m ,h);
576 lls_free_parse_result(sub_lpr, cmd);
578 lls_free_parse_result(lpr, CMD_PTR(PARA_MIXER));
583 PARA_ERROR_LOG("%s\n", errctx);
585 PARA_EMERG_LOG("%s\n", para_strerror(-ret));