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 /* At least one of the two is defined if this file gets compiled. */
25 static const struct mixer *mixers[] = {
34 #define NUM_SUPPORTED_MIXERS (ARRAY_SIZE(mixers))
35 #define FOR_EACH_MIXER(i) for ((i) = 0; (i) < NUM_SUPPORTED_MIXERS; (i)++)
37 static struct lls_parse_result *lpr, *sub_lpr;
39 #define CMD_PTR(_cmd) (lls_cmd(LSG_MIXER_CMD_ ## _cmd, mixer_suite))
40 #define OPT_RESULT(_cmd, _opt) (lls_opt_result( \
41 LSG_MIXER_ ## _cmd ## _OPT_ ## _opt, (LSG_MIXER_CMD_ ## _cmd == 0)? lpr : sub_lpr))
42 #define OPT_GIVEN(_cmd, _opt) (lls_opt_given(OPT_RESULT(_cmd, _opt)))
43 #define OPT_STRING_VAL(_cmd, _opt) (lls_string_val(0, OPT_RESULT(_cmd, _opt)))
44 #define OPT_UINT32_VAL(_cmd, _opt) (lls_uint32_val(0, OPT_RESULT(_cmd, _opt)))
46 typedef int (*mixer_subcommand_handler_t)(const struct mixer *, struct mixer_handle *);
48 #define EXPORT_CMD(_cmd) const mixer_subcommand_handler_t \
49 lsg_mixer_com_ ## _cmd ## _user_data = &com_ ## _cmd;
52 static __printf_2_3 void date_log(int ll, const char *fmt, ...)
62 fprintf(stderr, "%d:%02d:%02d ", tm->tm_hour, tm->tm_min, tm->tm_sec);
67 __printf_2_3 void (*para_log)(int, const char*, ...) = date_log;
69 static int set_channel(const struct mixer *m, struct mixer_handle *h,
73 PARA_NOTICE_LOG("using %s mixer channel\n", channel?
75 return m->set_channel(h, channel);
78 static void millisleep(int ms)
82 PARA_INFO_LOG("sleeping %dms\n", ms);
85 ts.tv_sec = ms / 1000,
86 ts.tv_nsec = (ms % 1000) * 1000 * 1000;
91 * This implements the inverse function of t -> t^alpha, scaled to the time
92 * interval [0,T] and the range given by old_vol and new_vol. It returns the
93 * amount of milliseconds until the given volume is reached.
95 static unsigned volume_time(double vol, double old_vol, double new_vol,
96 double T, double alpha)
100 if (old_vol < new_vol) {
108 x = T * exp(log(((vol - c) / (d - c))) / alpha);
110 if (old_vol < new_vol)
116 /* Fade to new volume in fade_time seconds. */
117 static int fade(const struct mixer *m, struct mixer_handle *h, uint32_t new_vol,
120 int i, T, old_vol, ret, slept, incr;
122 uint32_t fe = OPT_UINT32_VAL(PARA_MIXER, FADE_EXPONENT);
124 if (fade_time <= 0 || fe >= 100) {
125 ret = m->set(h, new_vol);
130 alpha = (100 - fe) / 100.0;
135 if (old_vol == new_vol)
137 PARA_NOTICE_LOG("fading %s from %d to %u in %u seconds\n",
138 OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL), old_vol,
140 incr = old_vol < new_vol? 1 : -1;
141 T = fade_time * 1000;
145 ms = volume_time(i + incr, old_vol, new_vol, T, alpha);
146 millisleep(ms - slept);
152 } while (i != new_vol);
159 static int com_fade(const struct mixer *m, struct mixer_handle *h)
161 uint32_t new_vol = OPT_UINT32_VAL(FADE, FADE_VOL);
162 uint32_t fade_time = OPT_UINT32_VAL(FADE, FADE_TIME);
163 return fade(m, h, new_vol, fade_time);
167 static void client_cmd(const char *cmd)
169 int ret, status, fds[3] = {0, 0, 0};
171 char *cmdline = make_message(BINDIR "/para_client %s", cmd);
173 PARA_NOTICE_LOG("%s\n", cmdline);
174 ret = para_exec_cmdline_pid(&pid, cmdline, fds);
177 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
181 pid = waitpid(pid, &status, 0);
182 while (pid == -1 && errno == EINTR);
184 PARA_ERROR_LOG("%s\n", strerror(errno));
187 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
191 PARA_EMERG_LOG("command \"%s\" failed\n", cmd);
195 static void change_afs_mode(const char *afs_mode)
202 cmd = make_message("select %s", afs_mode);
207 static int set_initial_volume(const struct mixer *m, struct mixer_handle *h)
211 for (i = 0; i < OPT_GIVEN(SLEEP, IVOL); i++) {
212 const char *val = lls_string_val(i, OPT_RESULT(SLEEP, IVOL));
213 char *p, *ch, *arg = para_strdup(val);
215 p = strchr(arg, ':');
224 ret = para_atoi32(p, &iv);
229 ret = set_channel(m, h, ch);
233 PARA_WARNING_LOG("ignoring channel %s\n", ch);
236 PARA_INFO_LOG("initial volume %s: %d\n", ch, iv);
246 static int com_sleep(const struct mixer *m, struct mixer_handle *h)
248 time_t t1, wake_time_epoch;
252 const char *wake_time = OPT_STRING_VAL(SLEEP, WAKE_TIME);
253 const char *fo_mood = OPT_STRING_VAL(SLEEP, FO_MOOD);
254 const char *fi_mood = OPT_STRING_VAL(SLEEP, FI_MOOD);
255 const char *sleep_mood = OPT_STRING_VAL(SLEEP, SLEEP_MOOD);
256 int fit = OPT_UINT32_VAL(SLEEP, FI_TIME);
257 int fot = OPT_UINT32_VAL(SLEEP, FO_TIME);
258 int fiv = OPT_UINT32_VAL(SLEEP, FI_VOL);
259 int fov = OPT_UINT32_VAL(SLEEP, FO_VOL);
260 int32_t hour, min = 0;
262 char *wt = para_strdup(wake_time + (wake_time[0] == '+'));
264 /* calculate wake time */
266 tmp = strchr(wt, ':');
270 ret = para_atoi32(tmp, &min);
276 ret = para_atoi32(wt, &hour);
280 if (wake_time[0] == '+') { /* relative */
281 t1 += hour * 60 * 60 + min * 60;
285 if (tm->tm_hour > hour || (tm->tm_hour == hour && tm->tm_min> min)) {
286 t1 += 86400; /* wake time is tomorrow */
293 wake_time_epoch = mktime(tm);
294 PARA_INFO_LOG("waketime: %d:%02d\n", tm->tm_hour, tm->tm_min);
298 ret = set_initial_volume(m, h);
301 change_afs_mode(fo_mood);
303 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
306 ret = fade(m, h, fov, fot);
310 ret = m->set(h, fov);
314 if (OPT_GIVEN(SLEEP, SLEEP_MOOD)) {
315 change_afs_mode(sleep_mood);
321 change_afs_mode(fi_mood);
324 if (wake_time_epoch <= t1 + fit)
326 delay = wake_time_epoch - t1 - fit;
327 PARA_INFO_LOG("sleeping %u seconds (%u:%02u)\n",
329 (delay % 3600) / 60);
333 ret = fade(m, h, fiv, fit);
334 PARA_INFO_LOG("fade complete, returning\n");
339 static int com_snooze(const struct mixer *m, struct mixer_handle *h)
343 if (OPT_UINT32_VAL(SNOOZE, SO_TIME) == 0)
349 if (val < OPT_UINT32_VAL(SNOOZE, SO_VOL))
350 ret = m->set(h, OPT_UINT32_VAL(SNOOZE, SO_VOL));
352 ret = fade(m, h, OPT_UINT32_VAL(SNOOZE, SO_VOL),
353 OPT_UINT32_VAL(SNOOZE, SO_TIME));
357 PARA_NOTICE_LOG("%" PRIu32 " seconds snooze time...\n",
358 OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
359 sleep(OPT_UINT32_VAL(SNOOZE, SNOOZE_TIME));
361 return fade(m, h, OPT_UINT32_VAL(SNOOZE, SI_VOL),
362 OPT_UINT32_VAL(SNOOZE, SI_TIME));
366 static int com_set(const struct mixer *m, struct mixer_handle *h)
368 return m->set(h, OPT_UINT32_VAL(SET, VAL));
372 static const struct mixer *get_mixer_or_die(void)
376 if (!OPT_GIVEN(PARA_MIXER, MIXER_API))
377 i = 0; /* default: use first mixer */
380 if (!strcmp(mixers[i]->name,
381 OPT_STRING_VAL(PARA_MIXER, MIXER_API)))
383 if (i < NUM_SUPPORTED_MIXERS) {
384 PARA_NOTICE_LOG("using %s mixer API\n", mixers[i]->name);
387 printf("available mixer APIs: ");
389 printf("%s%s%s ", i == 0? "[" : "", mixers[i]->name,
395 static void show_subcommands(void)
397 const struct lls_command *cmd;
399 printf("Subcommands:\n");
400 for (i = 1; (cmd = lls_cmd(i, mixer_suite)); i++) {
401 const char *name = lls_command_name(cmd);
402 const char *purpose = lls_purpose(cmd);
403 printf("%-20s%s\n", name, purpose);
408 static int com_help(__a_unused const struct mixer *m,
409 __a_unused struct mixer_handle *h)
411 const struct lls_command *cmd;
412 const struct lls_opt_result *r_l = OPT_RESULT(HELP, LONG);
417 ret = lls_check_arg_count(sub_lpr, 0, 1, NULL);
420 if (lls_num_inputs(sub_lpr) == 0) {
424 name = lls_input(0, sub_lpr);
425 ret = lls(lls_lookup_subcmd(name, mixer_suite, &errctx));
428 PARA_ERROR_LOG("%s\n", errctx);
432 cmd = lls_cmd(ret, mixer_suite);
433 if (lls_opt_given(r_l))
434 txt = lls_long_help(cmd);
436 txt = lls_short_help(cmd);
443 static void handle_help_flags(void)
447 if (OPT_GIVEN(PARA_MIXER, DETAILED_HELP))
448 help = lls_long_help(CMD_PTR(PARA_MIXER));
449 else if (OPT_GIVEN(PARA_MIXER, HELP))
450 help = lls_short_help(CMD_PTR(PARA_MIXER));
459 static int parse_and_merge_config_file(const struct lls_command *cmd)
464 char *cf, *errctx = NULL;
465 struct lls_parse_result **lprp, *cf_lpr, *merged_lpr;
468 const char *subcmd_name;
470 if (cmd == lls_cmd(0, mixer_suite)) {
475 subcmd_name = lls_command_name(cmd);
477 if (OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
478 cf = para_strdup(OPT_STRING_VAL(PARA_MIXER, CONFIG_FILE));
480 char *home = para_homedir();
481 cf = make_message("%s/.paraslash/mixer.conf", home);
484 ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
486 if (ret != -E_EMPTY && ret != -ERRNO_TO_PARA_ERROR(ENOENT))
488 if (ret == -ERRNO_TO_PARA_ERROR(ENOENT) &&
489 OPT_GIVEN(PARA_MIXER, CONFIG_FILE))
492 ret = lls(lls_convert_config(map, sz, subcmd_name, &cf_argv, &errctx));
493 para_munmap(map, sz);
497 ret = lls(lls_parse(cf_argc, cf_argv, cmd, &cf_lpr, &errctx));
498 lls_free_argv(cf_argv);
501 ret = lls(lls_merge(*lprp, cf_lpr, cmd, &merged_lpr, &errctx));
502 lls_free_parse_result(cf_lpr, cmd);
505 lls_free_parse_result(*lprp, cmd);
507 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
513 PARA_ERROR_LOG("%s\n", errctx);
519 * The main function of para_mixer.
521 * The executable is linked with the alsa or the oss mixer API, or both. It has
522 * a custom log function which prefixes log messages with the current date.
524 * \param argc Argument counter.
525 * \param argv Argument vector.
527 * \return EXIT_SUCCESS or EXIT_FAILURE.
529 int main(int argc, char *argv[])
531 const struct lls_command *cmd = CMD_PTR(PARA_MIXER);
535 const struct mixer *m;
536 struct mixer_handle *h;
539 ret = lls(lls_parse(argc, argv, cmd, &lpr, &errctx));
542 loglevel = OPT_UINT32_VAL(PARA_MIXER, LOGLEVEL);
543 version_handle_flag("mixer", OPT_GIVEN(PARA_MIXER, VERSION));
546 n = lls_num_inputs(lpr);
552 ret = parse_and_merge_config_file(cmd);
555 subcmd = lls_input(0, lpr);
556 ret = lls(lls_lookup_subcmd(subcmd, mixer_suite, &errctx));
559 cmd = lls_cmd(ret, mixer_suite);
560 ret = lls(lls_parse(n, argv + argc - n, cmd, &sub_lpr, &errctx));
563 ret = parse_and_merge_config_file(cmd);
566 m = get_mixer_or_die();
567 ret = m->open(OPT_STRING_VAL(PARA_MIXER, MIXER_DEVICE), &h);
570 ret = set_channel(m, h, OPT_STRING_VAL(PARA_MIXER, MIXER_CHANNEL));
571 if (ret == -E_BAD_CHANNEL) {
572 char *channels = m->get_channels(h);
573 printf("Available channels: %s\n", channels);
578 ret = (*(mixer_subcommand_handler_t *)(lls_user_data(cmd)))(m ,h);
582 lls_free_parse_result(sub_lpr, cmd);
584 lls_free_parse_result(lpr, CMD_PTR(PARA_MIXER));
589 PARA_ERROR_LOG("%s\n", errctx);
591 PARA_EMERG_LOG("%s\n", para_strerror(-ret));