1 /* Copyright (C) 1998 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
3 /** \file mixer.c A volume fader and alarm clock. */
18 /** Array of error strings. */
21 /* At least one of the two is defined if this file gets compiled. */
22 static const struct mixer *mixers[] = {
31 #define NUM_SUPPORTED_MIXERS (ARRAY_SIZE(mixers))
32 #define FOR_EACH_MIXER(i) for ((i) = 0; (i) < NUM_SUPPORTED_MIXERS; (i)++)
34 static struct lls_parse_result *lpr, *sub_lpr;
36 #define CMD_PTR(_cmd) (lls_cmd(LSG_MIXER_CMD_ ## _cmd, mixer_suite))
37 #define OPT_RESULT(_cmd, _opt) (lls_opt_result( \
38 LSG_MIXER_ ## _cmd ## _OPT_ ## _opt, (LSG_MIXER_CMD_ ## _cmd == 0)? lpr : sub_lpr))
39 #define OPT_GIVEN(_cmd, _opt) (lls_opt_given(OPT_RESULT(_cmd, _opt)))
40 #define OPT_STRING_VAL(_cmd, _opt) (lls_string_val(0, OPT_RESULT(_cmd, _opt)))
41 #define OPT_UINT32_VAL(_cmd, _opt) (lls_uint32_val(0, OPT_RESULT(_cmd, _opt)))
43 typedef int (*mixer_subcommand_handler_t)(const struct mixer *);
45 #define EXPORT_CMD(_cmd) const mixer_subcommand_handler_t \
46 lsg_mixer_com_ ## _cmd ## _user_data = &com_ ## _cmd;
49 static __printf_2_3 void date_log(int ll, const char *fmt, ...)
59 fprintf(stderr, "%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
64 __printf_2_3 void (*para_log)(int, const char*, ...) = date_log;
66 static int set_channel(const struct mixer *m, struct mixer_handle *h,
70 PARA_NOTICE_LOG("using %s mixer channel\n", channel?
72 return m->set_channel(h, channel);
75 static void millisleep(int ms)
79 PARA_INFO_LOG("sleeping %dms\n", ms);
82 ts.tv_sec = ms / 1000,
83 ts.tv_nsec = (ms % 1000) * 1000 * 1000;
88 * This implements the inverse function of t -> t^alpha, scaled to the time
89 * interval [0,T] and the range given by old_vol and new_vol. It returns the
90 * amount of milliseconds until the given volume is reached.
92 static unsigned volume_time(double vol, double old_vol, double new_vol,
93 double T, double alpha)
97 if (old_vol < new_vol) {
105 x = T * exp(log(((vol - c) / (d - c))) / alpha);
107 if (old_vol < new_vol)
113 /* Fade to new volume in fade_time seconds. */
114 static int fade(const struct mixer *m, struct mixer_handle *h, uint32_t new_vol,
117 int i, T, old_vol, ret, slept, incr;
119 uint32_t fe = OPT_UINT32_VAL(PARA_MIXER, FADE_EXPONENT);
121 if (fade_time <= 0 || fe >= 100) {
122 ret = m->set(h, new_vol);
127 alpha = (100 - fe) / 100.0;
132 if (old_vol == new_vol)
134 PARA_NOTICE_LOG("fading %s from %d to %u in %u seconds\n",
135 OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL), old_vol,
137 incr = old_vol < new_vol? 1 : -1;
138 T = fade_time * 1000;
142 ms = volume_time(i + incr, old_vol, new_vol, T, alpha);
143 millisleep(ms - slept);
149 } while (i != new_vol);
156 static int open_mixer_and_set_channel(const struct mixer *m, struct mixer_handle **h)
160 ret = m->open(OPT_STRING_VAL(PARA_MIXER, MIXER_DEVICE), h);
163 ret = set_channel(m, *h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
164 if (ret == -E_BAD_CHANNEL) {
165 char *channels = m->get_channels(*h);
166 printf("Available channels: %s\n", channels);
174 static int com_fade(const struct mixer *m)
176 uint32_t new_vol = OPT_UINT32_VAL(FADE, FADE_VOL);
177 uint32_t fade_time = OPT_UINT32_VAL(FADE, FADE_TIME);
178 struct mixer_handle *h;
181 ret = open_mixer_and_set_channel(m, &h);
184 ret = fade(m, h, new_vol, fade_time);
190 static void run(const char *exe, const char *cmd)
192 int ret, status, fds[3] = {0, 0, 0};
194 char *cmdline = make_message("%s %s", exe, cmd);
196 PARA_NOTICE_LOG("%s\n", cmdline);
197 ret = para_exec_cmdline_pid(&pid, cmdline, fds);
200 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
204 pid = waitpid(pid, &status, 0);
205 while (pid == -1 && errno == EINTR);
207 PARA_ERROR_LOG("%s\n", strerror(errno));
210 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
214 PARA_EMERG_LOG("command \"%s\" failed\n", cmd);
218 static void client_cmd(const char *cmd)
220 run(BINDIR "/para_client", cmd);
223 static void audioc_cmd(const char *cmd)
225 run(BINDIR "/para_audioc", cmd);
228 static void change_afs_mode(const char *afs_mode)
232 cmd = make_message("select %s", afs_mode);
237 static int set_initial_volume(const struct mixer *m, struct mixer_handle *h)
241 for (i = 0; i < OPT_GIVEN(SLEEP, IVOL); i++) {
242 const char *val = lls_string_val(i, OPT_RESULT(SLEEP, IVOL));
243 char *p, *ch, *arg = para_strdup(val);
245 p = strchr(arg, ':');
254 ret = para_atoi32(p, &iv);
259 ret = set_channel(m, h, ch);
263 PARA_WARNING_LOG("ignoring channel %s\n", ch);
266 PARA_INFO_LOG("initial volume %s: %d\n", ch, iv);
276 static void stop(const struct mixer *m, struct mixer_handle *h)
278 int ret, old_vol = 0;
290 static int com_sleep(const struct mixer *m)
292 time_t t1, wake_time_epoch;
296 const char *wake_time = OPT_STRING_VAL(SLEEP, WAKE_TIME);
297 const char *initial_mood = OPT_STRING_VAL(SLEEP, INITIAL_MOOD);
298 const char *fo_mood = OPT_STRING_VAL(SLEEP, FO_MOOD);
299 const char *fi_mood = OPT_STRING_VAL(SLEEP, FI_MOOD);
300 const char *sleep_mood = OPT_STRING_VAL(SLEEP, SLEEP_MOOD);
301 int fit = OPT_UINT32_VAL(SLEEP, FI_TIME);
302 int fot = OPT_UINT32_VAL(SLEEP, FO_TIME);
303 int fiv = OPT_UINT32_VAL(SLEEP, FI_VOL);
304 int fov = OPT_UINT32_VAL(SLEEP, FO_VOL);
305 int32_t hour, min = 0;
307 struct mixer_handle *h;
309 ret = open_mixer_and_set_channel(m, &h);
312 wt = para_strdup(wake_time + (wake_time[0] == '+'));
313 /* calculate wake time */
315 tmp = strchr(wt, ':');
319 ret = para_atoi32(tmp, &min);
325 ret = para_atoi32(wt, &hour);
329 if (wake_time[0] == '+') { /* relative */
330 t1 += hour * 60 * 60 + min * 60;
334 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
335 t1 += 86400; /* wake time is tomorrow */
342 wake_time_epoch = mktime(tm);
343 PARA_INFO_LOG("waketime: %d:%02d\n", tm->tm_hour, tm->tm_min);
345 ret = set_initial_volume(m, h);
349 * Setting the volume invalidates the current channel setting, so we
350 * have to set it again.
352 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
355 delay = OPT_UINT32_VAL(SLEEP, INITIAL_DELAY);
356 if (delay > 0 && initial_mood && *initial_mood) {
357 change_afs_mode(initial_mood);
362 if (fot && fo_mood && *fo_mood) {
363 change_afs_mode(fo_mood);
365 ret = fade(m, h, fov, fot);
369 ret = m->set(h, fov);
373 if (sleep_mood && *sleep_mood) {
374 change_afs_mode(sleep_mood);
375 if (!fot || !fo_mood) /* currently stopped */
377 } else if (fot && fo_mood && *fo_mood) /* currently playing */
380 if (!fit || !fi_mood || !*fi_mood) /* nothing to do */
384 if (wake_time_epoch <= t1 + fit)
386 delay = wake_time_epoch - t1 - fit;
387 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
389 (delay % 3600) / 60);
392 change_afs_mode(fi_mood);
393 ret = open_mixer_and_set_channel(m, &h);
396 if (sleep_mood && *sleep_mood) /* currently playing */
399 ret = fade(m, h, fiv, fit);
406 static int com_snooze(const struct mixer *m)
409 struct mixer_handle *h;
411 ret = open_mixer_and_set_channel(m, &h);
415 if (OPT_UINT32_VAL(SNOOZE, SO_TIME) == 0)
421 if (val < OPT_UINT32_VAL(SNOOZE, SO_VOL))
422 ret = m->set(h, OPT_UINT32_VAL(SNOOZE, SO_VOL));
424 ret = fade(m, h, OPT_UINT32_VAL(SNOOZE, SO_VOL),
425 OPT_UINT32_VAL(SNOOZE, SO_TIME));
429 PARA_NOTICE_LOG("%" PRIu32 " seconds snooze time...\n",
430 OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
432 sleep(OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
434 ret = open_mixer_and_set_channel(m, &h);
437 ret = fade(m, h, OPT_UINT32_VAL(SNOOZE, SI_VOL),
438 OPT_UINT32_VAL(SNOOZE, SI_TIME));
445 static int com_set(const struct mixer *m)
447 struct mixer_handle *h;
450 ret = open_mixer_and_set_channel(m, &h);
453 ret = m->set(h, OPT_UINT32_VAL(SET, VAL));
459 static const struct mixer *get_mixer_or_die(void)
463 if (!OPT_GIVEN(PARA_MIXER, MIXER_API))
464 i = 0; /* default: use first mixer */
467 if (!strcmp(mixers[i]->name,
468 OPT_STRING_VAL(PARA_MIXER, MIXER_API)))
470 if (i < NUM_SUPPORTED_MIXERS) {
471 PARA_NOTICE_LOG("using %s mixer API\n", mixers[i]->name);
474 printf("available mixer APIs: ");
476 printf("%s%s%s ", i == 0? "[" : "", mixers[i]->name,
482 static void show_subcommands(void)
484 const struct lls_command *cmd;
486 printf("Subcommands:\n");
487 for (i = 1; (cmd = lls_cmd(i, mixer_suite)); i++) {
488 const char *name = lls_command_name(cmd);
489 const char *purpose = lls_purpose(cmd);
490 printf("%-20s%s\n", name, purpose);
494 static int com_help(__a_unused const struct mixer *m)
496 const struct lls_command *cmd;
497 const struct lls_opt_result *r_l = OPT_RESULT(HELP, LONG);
502 ret = lls_check_arg_count(sub_lpr, 0, 1, NULL);
505 if (lls_num_inputs(sub_lpr) == 0) {
509 name = lls_input(0, sub_lpr);
510 ret = lls(lls_lookup_subcmd(name, mixer_suite, &errctx));
513 PARA_ERROR_LOG("%s\n", errctx);
517 cmd = lls_cmd(ret, mixer_suite);
518 if (lls_opt_given(r_l))
519 txt = lls_long_help(cmd);
521 txt = lls_short_help(cmd);
528 static void handle_help_flags(void)
532 if (OPT_GIVEN(PARA_MIXER, DETAILED_HELP))
533 help = lls_long_help(CMD_PTR(PARA_MIXER));
534 else if (OPT_GIVEN(PARA_MIXER, HELP))
535 help = lls_short_help(CMD_PTR(PARA_MIXER));
544 static int parse_and_merge_config_file(const struct lls_command *cmd)
547 struct lls_parse_result **lprp = (cmd == lls_cmd(0, mixer_suite))?
550 ret = lsu_merge_config_file_options(OPT_STRING_VAL(PARA_MIXER,
551 CONFIG_FILE), "mixer.conf", lprp, cmd, mixer_suite,
555 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
560 * The main function of para_mixer.
562 * The executable is linked with the alsa or the oss mixer API, or both. It has
563 * a custom log function which prefixes log messages with the current date.
565 * \param argc Argument counter.
566 * \param argv Argument vector.
568 * \return EXIT_SUCCESS or EXIT_FAILURE.
570 int main(int argc, char *argv[])
572 const struct lls_command *cmd = CMD_PTR(PARA_MIXER);
576 const struct mixer *m;
579 ret = lls(lls_parse(argc, argv, cmd, &lpr, &errctx));
582 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
583 version_handle_flag("mixer", OPT_GIVEN(PARA_MIXER, VERSION));
586 n = lls_num_inputs(lpr);
592 ret = parse_and_merge_config_file(cmd);
595 subcmd = lls_input(0, lpr);
596 ret = lls(lls_lookup_subcmd(subcmd, mixer_suite, &errctx));
599 cmd = lls_cmd(ret, mixer_suite);
600 ret = lls(lls_parse(n, argv + argc - n, cmd, &sub_lpr, &errctx));
603 ret = parse_and_merge_config_file(cmd);
606 m = get_mixer_or_die();
607 ret = (*(mixer_subcommand_handler_t *)(lls_user_data(cmd)))(m);
609 lls_free_parse_result(sub_lpr, cmd);
611 lls_free_parse_result(lpr, CMD_PTR(PARA_MIXER));
616 PARA_ERROR_LOG("%s\n", errctx);
618 PARA_EMERG_LOG("%s\n", para_strerror(-ret));