2 * Copyright (C) 1998 Andre Noll <maan@tuebingen.mpg.de>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file mixer.c A volume fader and alarm clock for OSS. */
13 #include "mixer.lsg.h"
21 /** Array of error strings. */
24 enum mixer_id {MIXER_ENUM};
25 static char *mixer_name[] = {MIXER_NAMES};
27 static struct mixer supported_mixer[] = {MIXER_ARRAY};
28 #define FOR_EACH_MIXER(i) for ((i) = 0; (i) < NUM_SUPPORTED_MIXERS; (i)++)
30 static struct lls_parse_result *lpr, *sub_lpr;
32 #define CMD_PTR(_cmd) (lls_cmd(LSG_MIXER_CMD_ ## _cmd, mixer_suite))
33 #define OPT_RESULT(_cmd, _opt) (lls_opt_result( \
34 LSG_MIXER_ ## _cmd ## _OPT_ ## _opt, (LSG_MIXER_CMD_ ## _cmd == 0)? lpr : sub_lpr))
35 #define OPT_GIVEN(_cmd, _opt) (lls_opt_given(OPT_RESULT(_cmd, _opt)))
36 #define OPT_STRING_VAL(_cmd, _opt) (lls_string_val(0, OPT_RESULT(_cmd, _opt)))
37 #define OPT_UINT32_VAL(_cmd, _opt) (lls_uint32_val(0, OPT_RESULT(_cmd, _opt)))
39 typedef int (*mixer_subcommand_handler_t)(struct mixer *, struct mixer_handle *);
41 #define EXPORT_CMD(_cmd) const mixer_subcommand_handler_t \
42 lsg_mixer_com_ ## _cmd ## _user_data = &com_ ## _cmd;
45 static __printf_2_3 void date_log(int ll, const char *fmt, ...)
55 fprintf(stderr, "%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
60 __printf_2_3 void (*para_log)(int, const char*, ...) = date_log;
62 static int set_channel(struct mixer *m, struct mixer_handle *h, const char *channel)
65 PARA_NOTICE_LOG("using %s mixer channel\n", channel?
67 return m->set_channel(h, channel);
70 static void millisleep(int ms)
74 PARA_INFO_LOG("sleeping %dms\n", ms);
77 ts.tv_sec = ms / 1000,
78 ts.tv_nsec = (ms % 1000) * 1000 * 1000;
83 * This implements the inverse function of t -> t^alpha, scaled to the time
84 * interval [0,T] and the range given by old_vol and new_vol. It returns the
85 * amount of milliseconds until the given volume is reached.
87 static unsigned volume_time(double vol, double old_vol, double new_vol,
88 double T, double alpha)
92 if (old_vol < new_vol) {
100 x = T * exp(log(((vol - c) / (d - c))) / alpha);
102 if (old_vol < new_vol)
108 /* Fade to new volume in fade_time seconds. */
109 static int fade(struct mixer *m, struct mixer_handle *h, uint32_t new_vol,
112 int i, T, old_vol, ret, slept, incr;
114 uint32_t fe = OPT_UINT32_VAL(PARA_MIXER, FADE_EXPONENT);
116 if (fade_time <= 0 || fe >= 100) {
117 ret = m->set(h, new_vol);
122 alpha = (100 - fe) / 100.0;
127 if (old_vol == new_vol)
129 PARA_NOTICE_LOG("fading %s from %d to %u in %u seconds\n",
130 OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL), old_vol,
132 incr = old_vol < new_vol? 1 : -1;
133 T = fade_time * 1000;
137 ms = volume_time(i + incr, old_vol, new_vol, T, alpha);
138 millisleep(ms - slept);
144 } while (i != new_vol);
151 static int com_fade(struct mixer *m, struct mixer_handle *h)
153 uint32_t new_vol = OPT_UINT32_VAL(FADE, FADE_VOL);
154 uint32_t fade_time = OPT_UINT32_VAL(FADE, FADE_TIME);
155 return fade(m, h, new_vol, fade_time);
159 static void client_cmd(const char *cmd)
161 int ret, status, fds[3] = {0, 0, 0};
163 char *cmdline = make_message(BINDIR "/para_client %s", cmd);
165 PARA_NOTICE_LOG("%s\n", cmdline);
166 ret = para_exec_cmdline_pid(&pid, cmdline, fds);
169 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
173 pid = waitpid(pid, &status, 0);
174 while (pid == -1 && errno == EINTR);
176 PARA_ERROR_LOG("%s\n", strerror(errno));
179 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
183 PARA_EMERG_LOG("command \"%s\" failed\n", cmd);
187 static void change_afs_mode(const char *afs_mode)
194 cmd = make_message("select %s", afs_mode);
199 static int set_initial_volume(struct mixer *m, struct mixer_handle *h)
203 for (i = 0; i < OPT_GIVEN(SLEEP, IVOL); i++) {
204 const char *val = lls_string_val(i, OPT_RESULT(SLEEP, IVOL));
205 char *p, *ch, *arg = para_strdup(val);
207 p = strchr(arg, ':');
216 ret = para_atoi32(p, &iv);
221 ret = set_channel(m, h, ch);
225 PARA_WARNING_LOG("ignoring channel %s\n", ch);
228 PARA_INFO_LOG("initial volume %s: %d\n", ch, iv);
238 static int com_sleep(struct mixer *m, struct mixer_handle *h)
240 time_t t1, wake_time_epoch;
244 const char *wake_time = OPT_STRING_VAL(SLEEP, WAKE_TIME);
245 const char *fo_mood = OPT_STRING_VAL(SLEEP, FO_MOOD);
246 const char *fi_mood = OPT_STRING_VAL(SLEEP, FI_MOOD);
247 const char *sleep_mood = OPT_STRING_VAL(SLEEP, SLEEP_MOOD);
248 int fit = OPT_UINT32_VAL(SLEEP, FI_TIME);
249 int fot = OPT_UINT32_VAL(SLEEP, FO_TIME);
250 int fiv = OPT_UINT32_VAL(SLEEP, FI_VOL);
251 int fov = OPT_UINT32_VAL(SLEEP, FO_VOL);
252 int32_t hour, min = 0;
254 char *wt = para_strdup(wake_time + (wake_time[0] == '+'));
256 /* calculate wake time */
258 tmp = strchr(wt, ':');
262 ret = para_atoi32(tmp, &min);
268 ret = para_atoi32(wt, &hour);
272 if (wake_time[0] == '+') { /* relative */
273 t1 += hour * 60 * 60 + min * 60;
277 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
278 t1 += 86400; /* wake time is tomorrow */
285 wake_time_epoch = mktime(tm);
286 PARA_INFO_LOG("waketime: %d:%02d\n", tm->tm_hour, tm->tm_min);
290 ret = set_initial_volume(m, h);
293 change_afs_mode(fo_mood);
295 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
298 ret = fade(m, h, fov, fot);
302 ret = m->set(h, fov);
306 if (OPT_GIVEN(SLEEP, SLEEP_MOOD)) {
307 change_afs_mode(sleep_mood);
313 change_afs_mode(fi_mood);
316 if (wake_time_epoch <= t1 + fit)
318 delay = wake_time_epoch - t1 - fit;
319 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
321 (delay % 3600) / 60);
325 ret = fade(m, h, fiv, fit);
326 PARA_INFO_LOG("fade complete, returning\n");
331 static int com_snooze(struct mixer *m, struct mixer_handle *h)
335 if (OPT_UINT32_VAL(SNOOZE, SO_TIME) == 0)
341 if (val < OPT_UINT32_VAL(SNOOZE, SO_VOL))
342 ret = m->set(h, OPT_UINT32_VAL(SNOOZE, SO_VOL));
344 ret = fade(m, h, OPT_UINT32_VAL(SNOOZE, SO_VOL),
345 OPT_UINT32_VAL(SNOOZE, SO_TIME));
349 PARA_NOTICE_LOG("%" PRIu32 " seconds snooze time...\n",
350 OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
351 sleep(OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
353 return fade(m, h, OPT_UINT32_VAL(SNOOZE, SI_VOL),
354 OPT_UINT32_VAL(SNOOZE, SI_TIME));
358 static void init_mixers(void)
363 struct mixer *m = &supported_mixer[i];
364 PARA_DEBUG_LOG("initializing mixer API #%d (%s)\n",
370 static int com_set(struct mixer *m, struct mixer_handle *h)
372 return m->set(h, OPT_UINT32_VAL(SET, VAL));
376 static struct mixer *get_mixer_or_die(void)
380 if (!OPT_GIVEN(PARA_MIXER, MIXER_API))
384 if (!strcmp(mixer_name[i],
385 OPT_STRING_VAL(PARA_MIXER, MIXER_API)))
387 if (i < NUM_SUPPORTED_MIXERS) {
388 PARA_NOTICE_LOG("using %s mixer API\n", mixer_name[i]);
389 return supported_mixer + i;
391 printf("available mixer APIs: ");
393 int d = (i == DEFAULT_MIXER);
394 printf("%s%s%s ", d? "[" : "", mixer_name[i], d? "]" : "");
400 static void show_subcommands(void)
402 const struct lls_command *cmd;
404 printf("Subcommands:\n");
405 for (i = 1; (cmd = lls_cmd(i, mixer_suite)); i++) {
406 const char *name = lls_command_name(cmd);
407 const char *purpose = lls_purpose(cmd);
408 printf("%-20s%s\n", name, purpose);
413 static int com_help(__a_unused struct mixer *m, __a_unused struct mixer_handle *h)
415 const struct lls_command *cmd;
416 const struct lls_opt_result *r_l = OPT_RESULT(HELP, LONG);
421 ret = lls_check_arg_count(sub_lpr, 0, 1, NULL);
424 if (lls_num_inputs(sub_lpr) == 0) {
428 name = lls_input(0, sub_lpr);
429 ret = lls(lls_lookup_subcmd(name, mixer_suite, &errctx));
432 PARA_ERROR_LOG("%s\n", errctx);
436 cmd = lls_cmd(ret, mixer_suite);
437 if (lls_opt_given(r_l))
438 txt = lls_long_help(cmd);
440 txt = lls_short_help(cmd);
447 static void handle_help_flags(void)
451 if (OPT_GIVEN(PARA_MIXER, DETAILED_HELP))
452 help = lls_long_help(CMD_PTR(PARA_MIXER));
453 else if (OPT_GIVEN(PARA_MIXER, HELP))
454 help = lls_short_help(CMD_PTR(PARA_MIXER));
463 static int parse_and_merge_config_file(const struct lls_command *cmd)
468 char *cf, *errctx = NULL;
469 struct lls_parse_result **lprp, *cf_lpr, *merged_lpr;
472 const char *subcmd_name;
474 if (cmd == lls_cmd(0, mixer_suite)) {
479 subcmd_name = lls_command_name(cmd);
481 if (OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
482 cf = para_strdup(OPT_STRING_VAL(PARA_MIXER, CONFIG_FILE));
484 char *home = para_homedir();
485 cf = make_message("%s/.paraslash/mixer.conf", home);
488 ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
490 if (ret != -E_EMPTY && ret != -ERRNO_TO_PARA_ERROR(ENOENT))
492 if (ret == -ERRNO_TO_PARA_ERROR(ENOENT) &&
493 OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
496 ret = lls(lls_convert_config(map, sz, subcmd_name, &cf_argv, &errctx));
497 para_munmap(map, sz);
501 ret = lls(lls_parse(cf_argc, cf_argv, cmd, &cf_lpr, &errctx));
502 lls_free_argv(cf_argv);
505 ret = lls(lls_merge(*lprp, cf_lpr, cmd, &merged_lpr, &errctx));
506 lls_free_parse_result(cf_lpr, cmd);
509 lls_free_parse_result(*lprp, cmd);
511 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
517 PARA_ERROR_LOG("%s\n", errctx);
523 * The main function of para_mixer.
525 * The executable is linked with the alsa or the oss mixer API, or both. It has
526 * a custom log function which prefixes log messages with the current date.
528 * \param argc Argument counter.
529 * \param argv Argument vector.
531 * \return EXIT_SUCCESS or EXIT_FAILURE.
533 int main(int argc, char *argv[])
535 const struct lls_command *cmd = CMD_PTR(PARA_MIXER);
540 struct mixer_handle *h;
543 ret = lls(lls_parse(argc, argv, cmd, &lpr, &errctx));
546 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
547 version_handle_flag("mixer", OPT_GIVEN(PARA_MIXER, VERSION));
550 n = lls_num_inputs(lpr);
556 ret = parse_and_merge_config_file(cmd);
559 subcmd = lls_input(0, lpr);
560 ret = lls(lls_lookup_subcmd(subcmd, mixer_suite, &errctx));
563 cmd = lls_cmd(ret, mixer_suite);
564 ret = lls(lls_parse(n, argv + argc - n, cmd, &sub_lpr, &errctx));
567 ret = parse_and_merge_config_file(cmd);
571 m = get_mixer_or_die();
572 ret = m->open(OPT_STRING_VAL(PARA_MIXER, MIXER_DEVICE), &h);
575 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
576 if (ret == -E_BAD_CHANNEL) {
577 char *channels = m->get_channels(h);
578 printf("Available channels: %s\n", channels);
583 ret = (*(mixer_subcommand_handler_t *)(lls_user_data(cmd)))(m ,h);
587 lls_free_parse_result(sub_lpr, cmd);
589 lls_free_parse_result(lpr, CMD_PTR(PARA_MIXER));
594 PARA_ERROR_LOG("%s\n", errctx);
596 PARA_EMERG_LOG("%s\n", para_strerror(-ret));