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)
198 cmd = make_message("select %s", afs_mode);
203 static int set_initial_volume(const struct mixer *m, struct mixer_handle *h)
207 for (i = 0; i < OPT_GIVEN(SLEEP, IVOL); i++) {
208 const char *val = lls_string_val(i, OPT_RESULT(SLEEP, IVOL));
209 char *p, *ch, *arg = para_strdup(val);
211 p = strchr(arg, ':');
220 ret = para_atoi32(p, &iv);
225 ret = set_channel(m, h, ch);
229 PARA_WARNING_LOG("ignoring channel %s\n", ch);
232 PARA_INFO_LOG("initial volume %s: %d\n", ch, iv);
242 static int com_sleep(const struct mixer *m, struct mixer_handle *h)
244 time_t t1, wake_time_epoch;
248 const char *wake_time = OPT_STRING_VAL(SLEEP, WAKE_TIME);
249 const char *fo_mood = OPT_STRING_VAL(SLEEP, FO_MOOD);
250 const char *fi_mood = OPT_STRING_VAL(SLEEP, FI_MOOD);
251 const char *sleep_mood = OPT_STRING_VAL(SLEEP, SLEEP_MOOD);
252 int fit = OPT_UINT32_VAL(SLEEP, FI_TIME);
253 int fot = OPT_UINT32_VAL(SLEEP, FO_TIME);
254 int fiv = OPT_UINT32_VAL(SLEEP, FI_VOL);
255 int fov = OPT_UINT32_VAL(SLEEP, FO_VOL);
256 int32_t hour, min = 0;
258 char *wt = para_strdup(wake_time + (wake_time[0] == '+'));
260 /* calculate wake time */
262 tmp = strchr(wt, ':');
266 ret = para_atoi32(tmp, &min);
272 ret = para_atoi32(wt, &hour);
276 if (wake_time[0] == '+') { /* relative */
277 t1 += hour * 60 * 60 + min * 60;
281 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
282 t1 += 86400; /* wake time is tomorrow */
289 wake_time_epoch = mktime(tm);
290 PARA_INFO_LOG("waketime: %d:%02d\n", tm->tm_hour, tm->tm_min);
294 ret = set_initial_volume(m, h);
297 change_afs_mode(fo_mood);
299 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
302 ret = fade(m, h, fov, fot);
306 ret = m->set(h, fov);
310 if (OPT_GIVEN(SLEEP, SLEEP_MOOD)) {
311 change_afs_mode(sleep_mood);
317 change_afs_mode(fi_mood);
320 if (wake_time_epoch <= t1 + fit)
322 delay = wake_time_epoch - t1 - fit;
323 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
325 (delay % 3600) / 60);
329 ret = fade(m, h, fiv, fit);
330 PARA_INFO_LOG("fade complete, returning\n");
335 static int com_snooze(const struct mixer *m, struct mixer_handle *h)
339 if (OPT_UINT32_VAL(SNOOZE, SO_TIME) == 0)
345 if (val < OPT_UINT32_VAL(SNOOZE, SO_VOL))
346 ret = m->set(h, OPT_UINT32_VAL(SNOOZE, SO_VOL));
348 ret = fade(m, h, OPT_UINT32_VAL(SNOOZE, SO_VOL),
349 OPT_UINT32_VAL(SNOOZE, SO_TIME));
353 PARA_NOTICE_LOG("%" PRIu32 " seconds snooze time...\n",
354 OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
355 sleep(OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
357 return fade(m, h, OPT_UINT32_VAL(SNOOZE, SI_VOL),
358 OPT_UINT32_VAL(SNOOZE, SI_TIME));
362 static int com_set(const struct mixer *m, struct mixer_handle *h)
364 return m->set(h, OPT_UINT32_VAL(SET, VAL));
368 static const struct mixer *get_mixer_or_die(void)
372 if (!OPT_GIVEN(PARA_MIXER, MIXER_API))
373 i = 0; /* default: use first mixer */
376 if (!strcmp(mixers[i]->name,
377 OPT_STRING_VAL(PARA_MIXER, MIXER_API)))
379 if (i < NUM_SUPPORTED_MIXERS) {
380 PARA_NOTICE_LOG("using %s mixer API\n", mixers[i]->name);
383 printf("available mixer APIs: ");
385 printf("%s%s%s ", i == 0? "[" : "", mixers[i]->name,
391 static void show_subcommands(void)
393 const struct lls_command *cmd;
395 printf("Subcommands:\n");
396 for (i = 1; (cmd = lls_cmd(i, mixer_suite)); i++) {
397 const char *name = lls_command_name(cmd);
398 const char *purpose = lls_purpose(cmd);
399 printf("%-20s%s\n", name, purpose);
404 static int com_help(__a_unused const struct mixer *m,
405 __a_unused struct mixer_handle *h)
407 const struct lls_command *cmd;
408 const struct lls_opt_result *r_l = OPT_RESULT(HELP, LONG);
413 ret = lls_check_arg_count(sub_lpr, 0, 1, NULL);
416 if (lls_num_inputs(sub_lpr) == 0) {
420 name = lls_input(0, sub_lpr);
421 ret = lls(lls_lookup_subcmd(name, mixer_suite, &errctx));
424 PARA_ERROR_LOG("%s\n", errctx);
428 cmd = lls_cmd(ret, mixer_suite);
429 if (lls_opt_given(r_l))
430 txt = lls_long_help(cmd);
432 txt = lls_short_help(cmd);
439 static void handle_help_flags(void)
443 if (OPT_GIVEN(PARA_MIXER, DETAILED_HELP))
444 help = lls_long_help(CMD_PTR(PARA_MIXER));
445 else if (OPT_GIVEN(PARA_MIXER, HELP))
446 help = lls_short_help(CMD_PTR(PARA_MIXER));
455 static int parse_and_merge_config_file(const struct lls_command *cmd)
460 char *cf, *errctx = NULL;
461 struct lls_parse_result **lprp, *cf_lpr, *merged_lpr;
464 const char *subcmd_name;
466 if (cmd == lls_cmd(0, mixer_suite)) {
471 subcmd_name = lls_command_name(cmd);
473 if (OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
474 cf = para_strdup(OPT_STRING_VAL(PARA_MIXER, CONFIG_FILE));
476 char *home = para_homedir();
477 cf = make_message("%s/.paraslash/mixer.conf", home);
480 ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
482 if (ret != -E_EMPTY && ret != -ERRNO_TO_PARA_ERROR(ENOENT))
484 if (ret == -ERRNO_TO_PARA_ERROR(ENOENT) &&
485 OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
488 ret = lls(lls_convert_config(map, sz, subcmd_name, &cf_argv, &errctx));
489 para_munmap(map, sz);
493 ret = lls(lls_parse(cf_argc, cf_argv, cmd, &cf_lpr, &errctx));
494 lls_free_argv(cf_argv);
497 ret = lls(lls_merge(*lprp, cf_lpr, cmd, &merged_lpr, &errctx));
498 lls_free_parse_result(cf_lpr, cmd);
501 lls_free_parse_result(*lprp, cmd);
503 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
509 PARA_ERROR_LOG("%s\n", errctx);
515 * The main function of para_mixer.
517 * The executable is linked with the alsa or the oss mixer API, or both. It has
518 * a custom log function which prefixes log messages with the current date.
520 * \param argc Argument counter.
521 * \param argv Argument vector.
523 * \return EXIT_SUCCESS or EXIT_FAILURE.
525 int main(int argc, char *argv[])
527 const struct lls_command *cmd = CMD_PTR(PARA_MIXER);
531 const struct mixer *m;
532 struct mixer_handle *h;
535 ret = lls(lls_parse(argc, argv, cmd, &lpr, &errctx));
538 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
539 version_handle_flag("mixer", OPT_GIVEN(PARA_MIXER, VERSION));
542 n = lls_num_inputs(lpr);
548 ret = parse_and_merge_config_file(cmd);
551 subcmd = lls_input(0, lpr);
552 ret = lls(lls_lookup_subcmd(subcmd, mixer_suite, &errctx));
555 cmd = lls_cmd(ret, mixer_suite);
556 ret = lls(lls_parse(n, argv + argc - n, cmd, &sub_lpr, &errctx));
559 ret = parse_and_merge_config_file(cmd);
562 m = get_mixer_or_die();
563 ret = m->open(OPT_STRING_VAL(PARA_MIXER, MIXER_DEVICE), &h);
566 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
567 if (ret == -E_BAD_CHANNEL) {
568 char *channels = m->get_channels(h);
569 printf("Available channels: %s\n", channels);
574 ret = (*(mixer_subcommand_handler_t *)(lls_user_data(cmd)))(m ,h);
578 lls_free_parse_result(sub_lpr, cmd);
580 lls_free_parse_result(lpr, CMD_PTR(PARA_MIXER));
585 PARA_ERROR_LOG("%s\n", errctx);
587 PARA_EMERG_LOG("%s\n", para_strerror(-ret));