2 * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
19 /** \file audiod.c the paraslash's audio daemon */
23 #include "audiod.cmdline.h"
25 #include "close_on_fork.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
39 #include "write_common.h"
41 /** define the array of error lists needed by para_audiod */
43 /** define the array containing all supported audio formats */
44 DEFINE_AUDIO_FORMAT_ARRAY;
47 * the possible modes of operation
49 * - off: disconnect from para_server
50 * - on: receive status information from para_server and play the audio stream
51 * - sb: only receive status information but not the audio stream
53 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
55 /** defines how to handle one supported audio format */
56 struct audio_format_info {
57 /** pointer to the receiver for this audio format */
58 struct receiver *receiver;
59 /** the receiver configuration */
61 /** the number of filters that should be activated for this audio format */
62 unsigned int num_filters;
63 /** pointer to the array of filters to be activated */
64 struct filter **filters;
65 /** pointer to the array of filter configurations */
67 /** the number of filters that should be activated for this audio format */
68 unsigned int num_writers;
69 /** pointer to the array of writers to be activated */
70 struct writer **writers;
71 /** pointer to the array of writer configurations */
73 /** do not start receiver/filters/writer before this time */
74 struct timeval restart_barrier;
78 * describes one instance of a receiver-filter-writer chain
80 * \sa receier_node, receiver, filter, filter_node, filter_chain, writer,
81 * writer_node, writer_node_group.
84 /** number of the audio format in this slot */
86 /** writer start time */
87 struct timeval wstime;
88 /** the receiver info associated with this slot */
89 struct receiver_node *receiver_node;
90 /** the active filter chain */
91 struct filter_chain *fc;
92 /** the active writer node group */
93 struct writer_node_group *wng;
95 static struct slot_info slot[MAX_STREAM_SLOTS];
97 extern const char *status_item_list[NUM_STAT_ITEMS];
99 static struct gengetopt_args_info conf;
100 static struct timeval server_stream_start, sa_time_diff;
101 static int playing, current_decoder = -1,
102 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
103 sa_time_diff_sign = 1;
104 static char *af_status, /* the audio format announced in server status */
105 *socket_name, *hostname;
106 static char *stat_item_values[NUM_STAT_ITEMS];
107 static FILE *logfile;
108 static const struct timeval restart_delay = {0, 200 * 1000};
109 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
110 static struct timeval *now;
112 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
115 * the task for handling audiod commands
117 * \sa struct task, struct sched
119 struct command_task {
120 /** the local listening socket */
122 /** the associated task structure */
127 * the task for audiod's child (para_client stat)
129 * \sa struct task, struct sched
132 /** the output of the stat command is read from this fd */
134 /** stat data is stored here */
135 char buf[STRINGSIZE];
136 /** number of bytes loaded in \a buf */
138 /** the associated task structure */
141 static struct status_task status_task_struct, *stat_task = &status_task_struct;
149 /** defines one command of para_audiod */
150 struct audiod_command {
151 /** the name of the command */
153 /** pointer to the function that handles the command */
154 int (*handler)(int, int, char**);
156 * if the command prefers to handle the full line (rather than the usual
157 * argv[] array), it stores a pointer to the corresponding line handling
158 * function here. In this case, the above \a handler pointer must be NULL.
160 int (*line_handler)(int, char*);
161 /** one-line description of the command */
162 const char *description;
163 /** summary of the command line options */
164 const char *synopsis;
165 /** the long help text */
168 static int com_grab(int, char *);
169 static int com_cycle(int, int, char **);
170 static int com_help(int, int, char **);
171 static int com_kill(int, int, char **);
172 static int com_off(int, int, char **);
173 static int com_on(int, int, char **);
174 static int com_sb(int, int, char **);
175 static int com_stat(int, int, char **);
176 static int com_tasks(int, int, char **);
177 static int com_term(int, int, char **);
178 static struct audiod_command cmds[] = {
181 .handler = com_cycle,
182 .description = "switch to next mode",
186 "on -> standby -> off -> on\n"
191 .line_handler = com_grab,
192 .description = "grab the audio stream",
193 .synopsis = "-- grab [grab_options]",
196 "grab ('splice') the audio stream at any position in the filter \n"
197 "chain and send that data back to the client. Try\n"
198 "\t para_audioc -- grab -h\n"
199 "for the list of available options.\n"
205 .description = "display command list or help for given command",
206 .synopsis = "help [command]",
209 "When I was younger, so much younger than today, I never needed\n"
210 "anybody's help in any way. But now these days are gone, I'm not so\n"
211 "self assured. Now I find I've changed my mind and opened up the doors.\n"
213 " -- Beatles: Help\n"
219 .description = "kill an active audiod task",
220 .synopsis = "kill task_id [task_id ...]",
223 "call sched_unregister() and the event_handler of the given task(s)\n"
229 .description = "deactivate para_audiod",
233 "Close connection to para_server and stop all decoders.\n"
239 .description = "activate para_audiod",
243 "Establish connection to para_server, retrieve para_server's current\n"
244 "status. If playing, start corresponding decoder. Otherwise stop\n"
251 .description = "enter standby mode",
255 "Stop all decoders but leave connection to para_server open.\n"
261 .description = "print status information",
262 .synopsis = "stat [item1 ...]",
265 "Dump given status items (all if none given) to stdout.\n"
270 .handler = com_tasks,
271 .description = "list current tasks",
275 "print the list of task ids together with the status of each task\n"
281 .description = "terminate audiod",
285 "Stop all decoders, shut down connection to para_server and exit.\n"
293 /** iterate over all slots */
294 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
295 /** iterate over all supported audio formats */
296 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
297 /** iterate over the array of all audiod commands */
298 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
301 * get the audio format number
302 * \param name the name of the audio format
304 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
305 * \a name is not a supported audio format.
307 int get_audio_format_num(char *name)
310 FOR_EACH_AUDIO_FORMAT(i)
311 if (!strcmp(name, audio_formats[i]))
313 return -E_UNSUPPORTED_AUDIO_FORMAT;
317 * log function. first argument is loglevel.
319 void para_log(int ll, const char* fmt,...)
325 char str[MAXLINE] = "";
327 if (ll < conf.loglevel_arg)
329 outfd = logfile? logfile : stderr;
332 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
333 fprintf(outfd, "%s %s ", str, hostname);
334 if (conf.loglevel_arg <= INFO)
335 fprintf(outfd, "%i ", ll);
337 vfprintf(outfd, fmt, argp);
341 static int client_write(int fd, const char *buf)
343 size_t len = strlen(buf);
344 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
347 static char *get_time_string(struct timeval *newest_stime)
349 struct timeval diff, adj_stream_start, tmp;
350 int total = 0, use_server_time = 1;
355 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
357 if (audiod_status == AUDIOD_OFF)
359 if (sa_time_diff_sign > 0)
360 tv_diff(&server_stream_start, &sa_time_diff,
363 tv_add(&server_stream_start, &sa_time_diff,
365 tmp = adj_stream_start;
366 if (newest_stime && audiod_status == AUDIOD_ON) {
367 tv_diff(newest_stime, &adj_stream_start, &diff);
368 if (tv2ms(&diff) < 5000) {
373 tv_diff(now, &tmp, &diff);
374 total = diff.tv_sec + offset_seconds;
375 if (total > length_seconds)
376 total = length_seconds;
381 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
382 status_item_list[SI_PLAY_TIME],
383 use_server_time? "~" : "",
386 (length_seconds - total) / 60,
387 (length_seconds - total) % 60,
388 length_seconds? (total * 100 + length_seconds / 2) /
395 __malloc static char *audiod_status_string(void)
397 const char *status = (audiod_status == AUDIOD_ON)?
398 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
399 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
402 static struct timeval *wstime(void)
405 struct timeval *max = NULL;
407 struct slot_info *s = &slot[i];
410 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
416 __malloc static char *decoder_flags(void)
419 char decoder_flags[MAX_STREAM_SLOTS + 1];
422 struct slot_info *s = &slot[i];
424 if (s->receiver_node)
428 decoder_flags[i] = flag;
430 decoder_flags[MAX_STREAM_SLOTS] = '\0';
431 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
435 static char *configfile_exists(void)
437 static char *config_file;
440 char *home = para_homedir();
441 config_file = make_message("%s/.paraslash/audiod.conf", home);
444 return file_exists(config_file)? config_file : NULL;
447 static void setup_signal_handling(void)
449 sig_task->fd = para_signal_init();
450 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
451 para_install_sighandler(SIGINT);
452 para_install_sighandler(SIGTERM);
453 para_install_sighandler(SIGCHLD);
454 para_install_sighandler(SIGHUP);
455 signal(SIGPIPE, SIG_IGN);
458 static void audiod_status_dump(void)
460 static char *p_ts, *p_us, *p_as, *p_df;
461 struct timeval *t = wstime();
462 char *us, *tmp = get_time_string(t);
464 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
465 stat_client_write(tmp, SI_PLAY_TIME);
470 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
472 if (!p_us || strcmp(p_us, tmp))
473 stat_client_write(tmp, SI_AUDIOD_UPTIME);
477 tmp = audiod_status_string();
478 if (!p_as || strcmp(p_as, tmp))
479 stat_client_write(tmp, SI_AUDIOD_STATUS);
483 tmp = decoder_flags();
484 if (!p_df || strcmp(p_df, tmp))
485 stat_client_write(tmp, SI_DECODER_FLAGS);
490 static void clear_slot(int slot_num)
492 struct slot_info *s = &slot[slot_num];
494 PARA_INFO_LOG("clearing slot %d\n", slot_num);
495 memset(s, 0, sizeof(struct slot_info));
499 static void close_receiver(int slot_num)
501 struct slot_info *s = &slot[slot_num];
502 struct audio_format_info *a;
504 if (s->format < 0 || !s->receiver_node)
507 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
508 audio_formats[s->format] , slot_num, s->receiver_node->eof);
509 // if (!s->receiver_node->eof)
510 // unregister_task(&s->receiver_node->task);
511 a->receiver->close(s->receiver_node);
512 free(s->receiver_node);
513 s->receiver_node = NULL;
514 /* set restart barrier */
515 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
518 static void kill_all_decoders(void)
523 struct slot_info *s = &slot[i];
524 if (s->wng && !s->wng->eof) {
525 PARA_INFO_LOG("unregistering writer node group in slot %d\n",
527 wng_unregister(s->wng);
530 if (s->fc && !s->fc->eof) {
531 PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
532 unregister_task(&s->fc->task);
535 if (s->receiver_node && !s->receiver_node->eof) {
536 PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
537 unregister_task(&s->receiver_node->task);
538 s->receiver_node->eof = 1;
543 static int get_empty_slot(void)
554 if (s->wng || s->receiver_node || s->fc)
559 return -E_NO_MORE_SLOTS;
562 static int decoder_running(int format)
569 if (s->format == format && s->receiver_node)
571 if (s->format == format && s->wng)
577 static void close_stat_pipe(void)
581 if (stat_task->fd < 0)
583 PARA_NOTICE_LOG("%s", "closing status pipe\n");
584 close(stat_task->fd);
585 del_close_on_fork_list(stat_task->fd);
588 for (i = 0; i < NUM_STAT_ITEMS; i++) {
589 free(stat_item_values[i]);
590 stat_item_values[i] = NULL;
595 audiod_status_dump();
597 stat_item_values[SI_STATUS_BAR] = make_message(
598 "%s:no connection to para_server\n",
599 status_item_list[SI_STATUS_BAR]);
600 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
603 static void __noreturn clean_exit(int status, const char *msg)
605 PARA_EMERG_LOG("%s\n", msg);
608 if (stat_task->fd >= 0)
614 * get the number of filters
616 * \param audio_format_num the number identifying the audio format
618 * \return the number of filters for the given audio format
622 int num_filters(int audio_format_num)
624 return afi[audio_format_num].num_filters;
627 static void filter_event_handler(struct task *t)
629 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
630 struct filter_chain *fc = t->private_data;
635 static void open_filters(int slot_num)
637 struct slot_info *s = &slot[slot_num];
638 struct audio_format_info *a = &afi[s->format];
639 int nf = a->num_filters;
645 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
646 s->fc = para_calloc(sizeof(struct filter_chain));
647 INIT_LIST_HEAD(&s->fc->filters);
648 s->fc->inbuf = s->receiver_node->buf;
649 s->fc->in_loaded = &s->receiver_node->loaded;
650 s->fc->input_eof = &s->receiver_node->eof;
651 s->fc->task.pre_select = filter_pre_select;
652 s->fc->task.event_handler = filter_event_handler;
653 s->fc->task.private_data = s->fc;
654 s->fc->task.flags = 0;
657 s->receiver_node->output_eof = &s->fc->eof;
658 sprintf(s->fc->task.status, "filter chain");
659 for (i = 0; i < nf; i++) {
660 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
661 fn->conf = a->filter_conf[i];
663 fn->filter = a->filters[i];
664 INIT_LIST_HEAD(&fn->callbacks);
665 list_add_tail(&fn->node, &s->fc->filters);
666 fn->filter->open(fn);
667 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
668 audio_formats[s->format], i + 1, nf,
669 fn->filter->name, slot_num);
670 s->fc->outbuf = fn->buf;
671 s->fc->out_loaded = &fn->loaded;
673 register_task(&s->fc->task);
676 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
678 struct filter_node *fn;
682 struct slot_info *s = &slot[i];
683 if (s->format < 0 || !s->fc)
685 if (slot_num >= 0 && slot_num != i)
687 if (format >= 0 && s->format != format)
689 if (num_filters(i) < filternum)
693 list_for_each_entry(fn, &s->fc->filters, node)
694 if (filternum <= 0 || j++ == filternum)
701 static void wng_event_handler(struct task *t)
703 struct writer_node_group *wng = t->private_data;
705 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
710 static void open_writers(int slot_num)
713 struct slot_info *s = &slot[slot_num];
714 struct audio_format_info *a = &afi[s->format];
716 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
718 s->wng = setup_default_wng();
720 s->wng = wng_new(a->num_writers);
722 s->wng->buf = s->fc->outbuf;
723 s->wng->loaded = s->fc->out_loaded;
724 s->wng->input_eof = &s->fc->eof;
725 s->wng->channels = &s->fc->channels;
726 s->wng->samplerate = &s->fc->samplerate;
727 s->fc->output_eof = &s->wng->eof;
728 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
730 s->wng->buf = s->receiver_node->buf;
731 s->wng->loaded = &s->receiver_node->loaded;
732 s->wng->input_eof = &s->receiver_node->eof;
734 s->wng->task.event_handler = wng_event_handler;
735 for (i = 0; i < a->num_writers; i++) {
736 s->wng->writer_nodes[i].conf = a->writer_conf[i];
737 s->wng->writer_nodes[i].writer = a->writers[i];
738 sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
740 ret = wng_open(s->wng);
742 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
746 current_decoder = slot_num;
747 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
750 static void rn_event_handler(struct task *t)
752 struct receiver_node *rn = t->private_data;
754 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
759 static void open_receiver(int format)
761 struct audio_format_info *a = &afi[format];
764 struct receiver_node *rn;
766 slot_num = get_empty_slot();
768 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
771 s->receiver_node = para_calloc(sizeof(struct receiver_node));
772 rn = s->receiver_node;
773 rn->receiver = a->receiver;
774 rn->conf = a->receiver_conf;
775 ret = a->receiver->open(s->receiver_node);
777 PARA_ERROR_LOG("failed to open receiver (%s)\n",
778 PARA_STRERROR(-ret));
779 free(s->receiver_node);
780 s->receiver_node = NULL;
783 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
784 audio_formats[s->format], a->receiver->name, slot_num);
785 rn->task.private_data = s->receiver_node;
786 rn->task.pre_select = a->receiver->pre_select;
787 rn->task.post_select = a->receiver->post_select;
788 rn->task.event_handler = rn_event_handler;
790 sprintf(rn->task.status, "receiver node");
791 register_task(&rn->task);
794 static int is_frozen(int format)
796 struct audio_format_info *a = &afi[format];
798 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
801 static void open_current_receiver(void)
807 i = get_audio_format_num(af_status);
810 if (decoder_running(i) || is_frozen(i))
815 static void compute_time_diff(const struct timeval *status_time)
817 struct timeval tmp, diff;
820 const struct timeval max_deviation = {0, 500 * 1000};
821 const int time_smooth = 5;
823 sign = tv_diff(status_time, now, &diff);
824 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
825 // sign, sa_time_diff_sign);
827 sa_time_diff_sign = sign;
833 int s = tv_diff(&diff, &sa_time_diff, &tmp);
834 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
835 PARA_WARNING_LOG("time diff jump: %lims\n",
839 sa_time_diff_sign = tv_convex_combination(
840 sa_time_diff_sign * time_smooth, &sa_time_diff,
841 count > 10? sign : sign * time_smooth, &diff,
844 PARA_DEBUG_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
847 sa_time_diff_sign ? "+" : "-",
852 static void check_stat_line(char *line)
856 long unsigned sec, usec;
859 // PARA_INFO_LOG("line: %s\n", line);
862 itemnum = stat_line_valid(line);
864 PARA_WARNING_LOG("invalid status line: %s\n", line);
867 tmp = make_message("%s\n", line);
868 stat_client_write(tmp, itemnum);
870 free(stat_item_values[itemnum]);
871 stat_item_values[itemnum] = para_strdup(line);
872 ilen = strlen(status_item_list[itemnum]);
875 playing = strstr(line, "playing")? 1 : 0;
879 af_status = para_strdup(line + ilen + 1);
882 offset_seconds = atoi(line + ilen + 1);
885 length_seconds = atoi(line + ilen + 1);
887 case SI_STREAM_START:
888 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
889 server_stream_start.tv_sec = sec;
890 server_stream_start.tv_usec = usec;
893 case SI_CURRENT_TIME:
894 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
895 struct timeval tv = {sec, usec};
896 compute_time_diff(&tv);
902 static void handle_signal(int sig)
907 pid_t pid = para_reap_child();
910 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
915 PARA_EMERG_LOG("terminating on signal %d\n", sig);
916 clean_exit(EXIT_FAILURE, "caught deadly signal");
921 static void try_to_close_slot(int slot_num)
923 struct slot_info *s = &slot[slot_num];
927 if (s->receiver_node && !s->receiver_node->eof)
929 if (s->fc && !s->fc->eof)
931 if (s->wng && !s->wng->eof)
933 PARA_INFO_LOG("closing slot %d \n", slot_num);
935 close_filters(s->fc);
937 close_receiver(slot_num);
938 clear_slot(slot_num);
941 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
947 if (audiod_status != AUDIOD_ON || !playing)
950 open_current_receiver();
952 struct slot_info *s = &slot[i];
953 struct audio_format_info *a;
958 if (!s->receiver_node)
960 if (!a->num_filters) {
961 if (s->receiver_node->loaded && !s->wng)
965 if (s->receiver_node->loaded && !s->fc) {
969 if (s->fc && *s->fc->out_loaded && !s->wng)
974 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
978 /* save away the current time for other users */
982 try_to_close_slot(i);
985 static void init_audiod_task(struct task *t)
987 t->pre_select = audiod_pre_select;
988 t->post_select = audiod_post_select;
989 t->event_handler = NULL;
992 sprintf(t->status, "audiod task");
995 static int parse_stream_command(const char *txt, char **cmd)
997 char *p = strchr(txt, ':');
1001 return -E_MISSING_COLON;
1003 FOR_EACH_AUDIO_FORMAT(i) {
1004 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1009 return -E_UNSUPPORTED_AUDIO_FORMAT;
1012 static int add_filter(int format, char *cmdline)
1014 struct audio_format_info *a = &afi[format];
1015 int filter_num, nf = a->num_filters;
1017 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1020 a->filters[nf] = &filters[filter_num];
1022 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1023 a->filters[nf]->name);
1027 static int init_writers(void)
1031 struct audio_format_info *a;
1033 init_supported_writers();
1034 nw = PARA_MAX(1, conf.writer_given);
1035 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
1036 FOR_EACH_AUDIO_FORMAT(i) {
1038 a->writer_conf = para_malloc(nw * sizeof(void *));
1039 a->writers = para_malloc(nw * sizeof(struct writer *));
1042 for (i = 0; i < conf.writer_given; i++) {
1045 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1049 nw = a->num_writers;
1050 wconf = check_writer_arg(cmd, &writer_num);
1055 a->writers[nw] = &writers[writer_num];
1056 a->writer_conf[nw] = wconf;
1057 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1058 nw, writer_names[writer_num]);
1066 static int init_receivers(void)
1068 int i, ret, receiver_num;
1070 struct audio_format_info *a;
1072 for (i = 0; receivers[i].name; i++) {
1073 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1074 receivers[i].init(&receivers[i]);
1076 for (i = 0; i < conf.receiver_given; i++) {
1077 char *arg = conf.receiver_arg[i];
1078 char *recv = strchr(arg, ':');
1079 ret = -E_MISSING_COLON;
1084 ret = get_audio_format_num(arg);
1087 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1088 if (!afi[ret].receiver_conf) {
1089 ret = -E_RECV_SYNTAX;
1092 afi[ret].receiver = &receivers[receiver_num];
1094 /* use the first available receiver with no arguments
1095 * for those audio formats for which no receiver
1098 cmd = para_strdup(receivers[0].name);
1099 FOR_EACH_AUDIO_FORMAT(i) {
1101 if (a->receiver_conf)
1103 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1104 if (!a->receiver_conf)
1105 return -E_RECV_SYNTAX;
1106 a->receiver = &receivers[receiver_num];
1114 static int init_default_filters(void)
1118 FOR_EACH_AUDIO_FORMAT(i) {
1119 struct audio_format_info *a = &afi[i];
1124 continue; /* no default -- nothing to to */
1125 /* add "dec" to audio format name */
1126 tmp = make_message("%sdec", audio_formats[i]);
1127 for (j = 0; filters[j].name; j++)
1128 if (!strcmp(tmp, filters[j].name))
1131 ret = -E_UNSUPPORTED_FILTER;
1132 if (!filters[j].name)
1134 tmp = para_strdup(filters[j].name);
1135 ret = add_filter(i, tmp);
1139 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1146 static int init_filters(void)
1150 filter_init(filters);
1151 nf = PARA_MAX(1, conf.filter_given);
1152 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
1153 FOR_EACH_AUDIO_FORMAT(i) {
1154 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1155 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1157 if (!conf.no_default_filters_given)
1158 return init_default_filters();
1159 for (i = 0; i < conf.filter_given; i++) {
1160 char *arg = conf.filter_arg[i];
1161 char *filter_name = strchr(arg, ':');
1162 ret = -E_MISSING_COLON;
1165 *filter_name = '\0';
1167 ret = get_audio_format_num(arg);
1170 ret = add_filter(ret, filter_name);
1174 ret = init_default_filters(); /* use default values for the rest */
1179 static int init_stream_io(void)
1183 ret = init_writers();
1186 ret = init_receivers();
1189 ret = init_filters();
1195 static int dump_commands(int fd)
1197 char *buf = para_strdup(""), *tmp = NULL;
1201 FOR_EACH_COMMAND(i) {
1202 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1203 cmds[i].description);
1207 ret = client_write(fd, buf);
1213 * command handlers don't close their fd on errors (ret < 0) so that
1214 * its caller can send an error message. Otherwise (ret >= 0) it's up
1215 * to each individual command to close the fd if necessary.
1218 static int com_help(int fd, int argc, char **argv)
1222 const char *dflt = "No such command. Available commands:\n";
1225 ret = dump_commands(fd);
1228 FOR_EACH_COMMAND(i) {
1229 if (strcmp(cmds[i].name, argv[1]))
1232 "NAME\n\t%s -- %s\n"
1233 "SYNOPSIS\n\tpara_audioc %s\n"
1234 "DESCRIPTION\n%s\n",
1236 cmds[i].description,
1240 ret = client_write(fd, buf);
1244 ret = client_write(fd, dflt);
1246 ret = dump_commands(fd);
1253 static int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
1255 char *tl = get_task_list();
1258 ret = client_write(fd, tl);
1265 static int com_kill(int fd, int argc, char **argv)
1269 return -E_AUDIOD_SYNTAX;
1270 for (i = 1; i < argc; i++) {
1271 ret = kill_task(argv[i]);
1280 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1284 long unsigned mask = ~0LU;
1288 for (i = 1; i < argc; i++) {
1289 ret = stat_item_valid(argv[i]);
1295 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1296 if (mask & (1 << SI_PLAY_TIME)) {
1297 struct timeval *t = wstime();
1298 char *ts = get_time_string(t);
1300 ret = client_write(fd, ts);
1306 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1307 char *tmp, *us = uptime_str();
1308 tmp = make_message("%s:%s\n",
1309 status_item_list[SI_AUDIOD_UPTIME], us);
1311 ret = client_write(fd, tmp);
1316 if (mask & (1 << SI_AUDIOD_STATUS)) {
1317 char *s = audiod_status_string();
1318 ret = client_write(fd, s);
1323 if (mask & (1 << SI_DECODER_FLAGS)) {
1324 char *df =decoder_flags();
1325 ret = client_write(fd, df);
1331 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1333 if (!((1 << i) & mask))
1335 v = stat_item_values[i];
1336 tmp = make_message("%s%s%s", buf? buf: "",
1337 v? v : "", v? "\n" : "");
1341 ret = client_write(fd, buf);
1344 ret = stat_client_add(fd, mask);
1349 static int com_grab(int fd, char *cmdline)
1351 struct grab_client *gc;
1352 struct filter_node *fn;
1356 gc = grab_client_new(fd, cmdline, &err);
1359 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1361 activate_grab_client(gc, fn);
1364 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1366 if (err == -E_GC_HELP_GIVEN) {
1367 msg = make_message("%s\n\n", grab_client_args_info_usage);
1368 for (i = 0; grab_client_args_info_help[i]; i++) {
1369 char *tmp = make_message("%s%s\n", msg,
1370 grab_client_args_info_help[i]);
1375 msg = make_message("%s %s\n",
1376 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1377 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1378 err = client_write(fd, msg);
1386 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1389 clean_exit(EXIT_SUCCESS, "terminating on user request");
1392 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1394 audiod_status = AUDIOD_ON;
1399 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1401 audiod_status = AUDIOD_OFF;
1406 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1408 audiod_status = AUDIOD_STANDBY;
1413 static int com_cycle(int fd, int argc, char **argv)
1415 switch (audiod_status) {
1417 return com_sb(fd, argc, argv);
1420 return com_on(fd, argc, argv);
1422 case AUDIOD_STANDBY:
1423 return com_off(fd, argc, argv);
1430 static int check_perms(uid_t uid)
1434 if (!conf.user_allow_given)
1436 for (i = 0; i < conf.user_allow_given; i++)
1437 if (uid == conf.user_allow_arg[i])
1439 return -E_UCRED_PERM;
1442 static int handle_connect(int accept_fd)
1444 int i, argc, ret, clifd = -1;
1445 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1446 struct sockaddr_un unix_addr;
1448 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
1452 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1455 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1456 ret = check_perms(ret);
1459 ret = -E_INVALID_AUDIOD_CMD;
1460 cmd = para_strdup(buf);
1461 p = strchr(cmd, '\n');
1468 for (i = 0; cmds[i].name; i++) {
1470 if (strcmp(cmds[i].name, cmd))
1472 if (cmds[i].handler) {
1473 argc = split_args(buf, &argv, "\n");
1474 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1475 ret = cmds[i].handler(clifd, argc, argv);
1478 for (j = 0; p[j]; j++)
1481 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1482 ret = cmds[i].line_handler(clifd, p);
1485 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1490 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1491 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1492 client_write(clifd, tmp);
1499 static int audiod_get_socket(void)
1501 struct sockaddr_un unix_addr;
1504 if (conf.socket_given)
1505 socket_name = para_strdup(conf.socket_arg);
1507 char *hn = para_hostname();
1508 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1512 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1513 if (conf.force_given)
1514 unlink(socket_name);
1515 fd = create_pf_socket(socket_name, &unix_addr,
1516 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1518 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1519 exit(EXIT_FAILURE); /* do not unlink socket */
1521 if (listen(fd , 5) < 0) {
1522 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1523 exit(EXIT_FAILURE); /* do not unlink socket */
1525 add_close_on_fork_list(fd);
1529 static int open_stat_pipe(void)
1531 int ret, fd[3] = {-1, 1, 0};
1533 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1536 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1537 add_close_on_fork_list(ret);
1539 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1543 void signal_event_handler(struct task *t)
1545 struct signal_task *st = t->private_data;
1547 if (t->ret != -E_SIGNAL_CAUGHT)
1548 PARA_ERROR_LOG("%s (ignored)\n", PARA_STRERROR(-t->ret));
1550 handle_signal(st->signum);
1553 void signal_pre_select(struct sched *s, struct task *t)
1555 struct signal_task *st = t->private_data;
1557 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1560 void signal_post_select(struct sched *s, struct task *t)
1562 struct signal_task *st = t->private_data;
1564 if (!FD_ISSET(st->fd, &s->rfds))
1566 t->ret = -E_SIGNAL_CAUGHT;
1567 st->signum = para_next_signal();
1570 void signal_setup_default(struct signal_task *st)
1572 st->task.pre_select = signal_pre_select;
1573 st->task.post_select = signal_post_select;
1574 st->task.private_data = st;
1576 sprintf(st->task.status, "signal task");
1579 static void command_pre_select(struct sched *s, struct task *t)
1581 struct command_task *ct = t->private_data;
1583 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1587 static void command_post_select(struct sched *s, struct task *t)
1590 struct command_task *ct = t->private_data;
1592 t->ret = 1; /* always successful */
1593 if (audiod_status != AUDIOD_OFF)
1594 audiod_status_dump();
1595 if (!FD_ISSET(ct->fd, &s->rfds))
1597 ret = handle_connect(ct->fd);
1599 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1602 static void init_command_task(struct command_task *ct)
1604 ct->task.pre_select = command_pre_select;
1605 ct->task.post_select = command_post_select;
1606 ct->task.event_handler = NULL;
1607 ct->task.private_data = ct;
1609 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1610 sprintf(ct->task.status, "command task");
1613 static void status_event_handler(__a_unused struct task *t)
1615 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-t->ret));
1617 /* avoid busy loop if server is down */
1618 while (sleep(1) > 0) /* FIXME */
1623 static void status_pre_select(struct sched *s, struct task *t)
1625 struct status_task *st = t->private_data;
1627 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1629 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1630 st->fd = open_stat_pipe();
1634 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1635 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1638 static void status_post_select(struct sched *s, struct task *t)
1640 struct status_task *st = t->private_data;
1643 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1645 t->ret = read(st->fd, st->buf + st->loaded, STRINGSIZE - 1 - st->loaded);
1648 t->ret = -E_STATUS_EOF;
1651 st->buf[t->ret + st->loaded] = '\0';
1652 st->loaded = for_each_line(st->buf, t->ret + st->loaded,
1656 static void init_status_task(struct status_task *st)
1658 st->task.pre_select = status_pre_select;
1659 st->task.post_select = status_post_select;
1660 st->task.event_handler = status_event_handler;
1661 st->task.private_data = st;
1666 sprintf(st->task.status, "status task");
1669 static void set_initial_status(void)
1671 audiod_status = AUDIOD_ON;
1672 if (!conf.mode_given)
1674 if (!strcmp(conf.mode_arg, "sb")) {
1675 audiod_status = AUDIOD_STANDBY;
1678 if (!strcmp(conf.mode_arg, "off")) {
1679 audiod_status = AUDIOD_OFF;
1682 if (strcmp(conf.mode_arg, "on"))
1683 PARA_WARNING_LOG("%s", "invalid mode\n");
1686 int main(int argc, char *argv[])
1691 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1692 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1697 hostname = para_hostname();
1698 cmdline_parser(argc, argv, &conf);
1699 para_drop_privileges(conf.user_arg, conf.group_arg);
1700 cf = configfile_exists();
1702 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1703 PARA_EMERG_LOG("%s", "parse error in config file\n");
1707 if (conf.logfile_given)
1708 logfile = open_log(conf.logfile_arg);
1709 log_welcome("para_audiod", conf.loglevel_arg);
1710 i = init_stream_io();
1712 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1715 server_uptime(UPTIME_SET);
1716 set_initial_status();
1720 setup_signal_handling();
1721 signal_setup_default(sig_task);
1722 sig_task->task.event_handler = signal_event_handler;
1724 init_status_task(stat_task);
1725 init_command_task(cmd_task);
1726 init_audiod_task(audiod_task);
1728 if (conf.daemon_given)
1731 register_task(&sig_task->task);
1732 register_task(&cmd_task->task);
1733 register_task(&stat_task->task);
1734 register_task(audiod_task);
1735 s.default_timeout.tv_sec = 0;
1736 s.default_timeout.tv_usec = 99 * 1000;
1739 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1740 return EXIT_FAILURE;