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 */
21 #include <sys/time.h> /* gettimeofday */
24 #include "audiod.cmdline.h"
26 #include "close_on_fork.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
31 #include "ringbuffer.h"
39 /** define the array of error lists needed by para_audiod */
41 /** define the array containing all supported audio formats */
42 DEFINE_AUDIO_FORMAT_ARRAY;
45 * the possible modes of operation
47 * - off: disconnect from para_server
48 * - on: receive status information from para_server and play the audio stream
49 * - sb: only receive status information but not the audio stream
51 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
53 /** defines how to handle one supported audio format */
54 struct audio_format_info {
55 /** pointer to the receiver for this audio format */
56 struct receiver *receiver;
57 /** the receiver configuration */
59 /** the number of filters that should be activated for this audio format */
60 unsigned int num_filters;
61 /** pointer to the array of filters to be activated */
62 struct filter **filters;
63 /** pointer to the array of filter configurations */
65 /** output of the last filter is written to stdin of this command */
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier;
72 * describes one instance of a receiver-filter-writer chain
74 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
77 /** number of the audio format in this slot */
79 /** the file descriptor of the writer */
81 /** the process id of the writer */
83 /** time of the last successful read from the receiver */
85 /** time the last write to the write fd happend */
87 /** writer start time */
88 struct timeval wstime;
89 /** did we include \a write_fd in the fdset */
91 /** set to one if we have sent the TERM signal to \a wpid */
93 /** the receiver info associated with this slot */
94 struct receiver_node *receiver_node;
95 /** the active filter chain */
96 struct filter_chain_info *fci;
99 static struct slot_info slot[MAX_STREAM_SLOTS];
101 /** defines one command of para_audiod */
102 struct audiod_command {
103 /** the name of the command */
105 /** pointer to the function that handles the command */
106 int (*handler)(int, int, char**);
107 /** one-line description of the command */
108 const char *description;
109 /** summary of the command line options */
110 const char *synopsis;
111 /** the long help text */
115 extern const char *status_item_list[NUM_STAT_ITEMS];
117 static int com_grab(int, int, char **);
118 static int com_cycle(int, int, char **);
119 static int com_help(int, int, char **);
120 static int com_off(int, int, char **);
121 static int com_on(int, int, char **);
122 static int com_sb(int, int, char **);
123 static int com_stat(int, int, char **);
124 static int com_term(int, int, char **);
125 static int stat_pipe = -1, signal_pipe;
127 static struct gengetopt_args_info conf;
128 static struct timeval server_stream_start, sa_time_diff;
129 static int playing, current_decoder = -1,
130 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
131 sa_time_diff_sign = 1, audiod_socket = -1;
132 static char *af_status, /* the audio format announced in server status */
133 *socket_name, *hostname;
134 /** how many status items to remember */
135 #define RINGBUFFER_SIZE 32
136 static void *stat_item_ringbuf;
137 static FILE *logfile;
138 static const struct timeval restart_delay = {0, 300 * 1000};
140 static struct audio_format_info afi[] = {
144 .write_cmd = "para_play",
148 .write_cmd = "para_play",
152 static struct audiod_command cmds[] = {
155 .handler = com_cycle,
156 .description = "switch to next mode",
160 "on -> standby -> off -> on\n"
166 .description = "grab the audio stream",
167 .synopsis = "-- grab [grab_options]",
169 "grab ('splice') the audio stream at any position in the filter \n"
170 "chain and send that data back to the client. \n"
171 "Available options:\n\n"
177 .description = "display command list or help for given command",
178 .synopsis = "help [command]",
181 "When I was younger, so much younger than today, I never needed\n"
182 "anybody's help in any way. But now these days are gone, I'm not so\n"
183 "self assured. Now I find I've changed my mind and opened up the doors.\n"
185 " -- Beatles: Help\n"
191 .description = "deactivate para_audiod",
195 "Close connection to para_server and stop all decoders.\n"
201 .description = "activate para_audiod",
205 "Establish connection to para_server, retrieve para_server's current\n"
206 "status. If playing, start corresponding decoder. Otherwise stop\n"
213 .description = "enter standby mode",
217 "Stop all decoders but leave connection to para_server open.\n"
223 .description = "print status information",
227 "Add para_audiod status information to para_server's status information\n"
228 "and dump everything to stdout.\n"
234 .description = "terminate audiod",
238 "Stop all decoders, shut down connection to para_server and exit.\n"
246 /** iterate over all slots */
247 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
248 /** iterate over all supported audio formats */
249 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
250 /** iterate over the array of all audiod commands */
251 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
254 * get the audio format number
255 * \param name the name of the audio format
257 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
258 * \a name is not a supported audio format.
260 int get_audio_format_num(char *name)
263 FOR_EACH_AUDIO_FORMAT(i)
264 if (!strcmp(name, audio_formats[i]))
266 return -E_UNSUPPORTED_AUDIO_FORMAT;
270 * log function. first argument is loglevel.
272 void para_log(int ll, char* fmt,...)
278 char str[MAXLINE] = "";
280 if (ll < conf.loglevel_arg)
282 if (!logfile && conf.logfile_given)
283 logfile = open_log(conf.logfile_arg);
284 if (!logfile && conf.daemon_given)
295 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
296 fprintf(outfd, "%s %s ", str, hostname);
297 if (conf.loglevel_arg <= INFO)
298 fprintf(outfd, "%i ", ll);
300 vfprintf(outfd, fmt, argp);
304 static int client_write(int fd, const char *buf)
306 size_t len = strlen(buf);
307 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
310 static char *get_time_string(struct timeval *newest_stime)
312 struct timeval now, diff, adj_stream_start, tmp;
313 int total = 0, use_server_time = 1;
316 return make_message("%s:", length_seconds?
317 "" : status_item_list[SI_PLAY_TIME]);
318 if (audiod_status == AUDIOD_OFF)
320 if (sa_time_diff_sign > 0)
321 tv_diff(&server_stream_start, &sa_time_diff,
324 tv_add(&server_stream_start, &sa_time_diff,
326 tmp = adj_stream_start;
327 if (newest_stime && audiod_status == AUDIOD_ON) {
328 tv_diff(newest_stime, &adj_stream_start, &diff);
329 if (tv2ms(&diff) < 5000) {
334 gettimeofday(&now, NULL);
335 tv_diff(&now, &tmp, &diff);
336 total = diff.tv_sec + offset_seconds;
337 if (total > length_seconds)
338 total = length_seconds;
343 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
344 status_item_list[SI_PLAY_TIME],
345 use_server_time? "~" : "",
348 (length_seconds - total) / 60,
349 (length_seconds - total) % 60,
350 length_seconds? (total * 100 + length_seconds / 2) /
357 static char *audiod_status_string(void)
360 struct timeval *newest_stime = NULL;
361 char *ret, *time_string, *uptime_string, *decoder_flags =
362 para_malloc((MAX_STREAM_SLOTS + 1) * sizeof(char));
365 struct slot_info *s = &slot[i];
367 if (s->receiver_node)
372 flag += s->format * 4;
373 decoder_flags[i] = flag;
376 if (newest_stime && tv_diff(&s->wstime, newest_stime, NULL) <= 0)
378 newest_stime = &s->wstime;
380 decoder_flags[MAX_STREAM_SLOTS] = '\0';
381 time_string = get_time_string(newest_stime);
382 uptime_string = uptime_str();
383 ret = make_message("%s:%s\n%s:%s\n%s:%s\n%s",
384 status_item_list[SI_AUDIOD_UPTIME], uptime_string,
385 status_item_list[SI_DECODER_FLAGS], decoder_flags,
386 status_item_list[SI_AUDIOD_STATUS], audiod_status == AUDIOD_ON?
387 "on" : (audiod_status == AUDIOD_OFF? "off": "sb"),
395 static char *configfile_exists(void)
397 static char *config_file;
400 char *home = para_homedir();
401 config_file = make_message("%s/.paraslash/audiod.conf", home);
404 return file_exists(config_file)? config_file : NULL;
407 static void setup_signal_handling(void)
409 signal_pipe = para_signal_init();
410 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
411 para_install_sighandler(SIGINT);
412 para_install_sighandler(SIGTERM);
413 para_install_sighandler(SIGCHLD);
414 para_install_sighandler(SIGHUP);
415 signal(SIGPIPE, SIG_IGN);
418 static void audiod_status_dump(void)
420 static char *prev_status;
421 char *tmp = audiod_status_string();
423 if (!prev_status || strcmp(tmp, prev_status))
424 stat_client_write(tmp);
429 static void clear_slot(int slot_num)
431 struct slot_info *s = &slot[slot_num];
433 PARA_INFO_LOG("clearing slot %d\n", slot_num);
434 memset(s, 0, sizeof(struct slot_info));
438 static void kill_stream_writer(int slot_num)
440 struct slot_info *s = &slot[slot_num];
442 if (s->format < 0 || s->wkilled || s->wpid <= 0)
444 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
445 s->wpid, audio_formats[s->format], slot_num);
446 kill(s->wpid, SIGTERM);
451 static void set_restart_barrier(int format, struct timeval *now)
458 gettimeofday(&tmp, NULL);
459 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
462 static void close_receiver(int slot_num)
464 struct slot_info *s = &slot[slot_num];
465 struct audio_format_info *a;
467 if (s->format < 0 || !s->receiver_node)
470 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
471 audio_formats[s->format] , slot_num);
472 a->receiver->close(s->receiver_node);
473 free(s->receiver_node);
474 s->receiver_node = NULL;
475 set_restart_barrier(s->format, NULL);
478 static void kill_all_decoders(void)
483 if (slot[i].format >= 0) {
484 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
485 kill_stream_writer(i);
489 static void check_sigchld(void)
494 gettimeofday(&now, NULL);
497 pid = para_reap_child();
501 struct slot_info *s = &slot[i];
505 if (pid == s->wpid) {
507 lifetime = now.tv_sec - s->wstime.tv_sec;
508 PARA_INFO_LOG("%s stream writer in slot %d died "
510 audio_formats[s->format], i, lifetime);
511 set_restart_barrier(s->format, &now);
512 goto reap_next_child;
515 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
516 goto reap_next_child;
519 static int get_empty_slot(void)
530 if (s->write_fd > 0 || s->wpid > 0)
532 if (s->receiver_node)
539 return -E_NO_MORE_SLOTS;
542 static int decoder_running(int format)
549 if (s->format == format && s->receiver_node)
551 if (s->format == format && s->wpid > 0)
557 static void close_stat_pipe(void)
564 PARA_NOTICE_LOG("%s", "closing status pipe\n");
566 del_close_on_fork_list(stat_pipe);
569 for (i = 0; i < RINGBUFFER_SIZE; i++)
570 free(ringbuffer_add(stat_item_ringbuf, para_strdup(NULL)));
574 audiod_status_dump();
576 msg = make_message("%s:no connection to para_server\n",
577 status_item_list[SI_STATUS_BAR]);
578 free(ringbuffer_add(stat_item_ringbuf, msg));
579 stat_client_write(msg);
582 static void __noreturn clean_exit(int status, const char *msg)
584 PARA_EMERG_LOG("%s\n", msg);
593 static char *glob_cmd(char *cmd)
595 char *ret, *replacement;
596 struct timeval tmp, delay, rss; /* real stream start */
598 delay.tv_sec = conf.stream_delay_arg / 1000;
599 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
600 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
601 if (sa_time_diff_sign < 0)
602 tv_add(&server_stream_start, &sa_time_diff, &rss);
604 tv_diff(&server_stream_start, &sa_time_diff, &rss);
605 tv_add(&rss, &delay, &tmp);
606 replacement = make_message("%lu:%lu", tmp.tv_sec, tmp.tv_usec);
607 ret = s_a_r(cmd, "STREAM_START", replacement);
611 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
614 gettimeofday(&now, NULL);
615 PARA_INFO_LOG("now: %lu:%lu\n", now.tv_sec, now.tv_usec);
621 /** get 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 open_filters(int slot_num)
629 struct slot_info *s = &slot[slot_num];
630 struct audio_format_info *a = &afi[s->format];
631 int nf = a->num_filters;
634 s->fci = para_calloc(sizeof(struct filter_chain_info));
635 INIT_LIST_HEAD(&s->fci->filters);
638 s->fci->inbuf = s->receiver_node->buf;
639 s->fci->in_loaded = &s->receiver_node->loaded;
640 s->fci->outbuf = s->receiver_node->buf;
641 s->fci->out_loaded = &s->receiver_node->loaded;
642 s->fci->eof = &s->receiver_node->eof;
643 for (i = 0; i < nf; i++) {
644 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
645 fn->conf = a->filter_conf[i];
647 fn->filter = a->filters[i];
648 INIT_LIST_HEAD(&fn->callbacks);
649 list_add_tail(&fn->node, &s->fci->filters);
650 fn->filter->open(fn);
651 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
652 audio_formats[s->format], i + 1, nf,
653 fn->filter->name, slot_num);
654 s->fci->outbuf = fn->buf;
655 s->fci->out_loaded = &fn->loaded;
657 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
661 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
663 struct filter_node *fn;
667 struct slot_info *s = &slot[i];
668 if (s->format < 0 || !s->fci)
670 if (slot_num >= 0 && slot_num != i)
672 if (format >= 0 && s->format != format)
674 if (num_filters(i) < filternum)
678 list_for_each_entry(fn, &s->fci->filters, node)
679 if (filternum <= 0 || j++ == filternum)
686 static void start_stream_writer(int slot_num)
688 int ret, fds[3] = {1, -1, -1};
689 struct slot_info *s = &slot[slot_num];
690 struct audio_format_info *a = &afi[s->format];
691 char *glob = glob_cmd(a->write_cmd);
693 PARA_INFO_LOG("starting stream writer: %s\n", glob? glob : a->write_cmd);
694 open_filters(slot_num);
696 ret = para_exec_cmdline_pid(&s->wpid, glob? glob : a->write_cmd, fds);
699 PARA_ERROR_LOG("exec failed (%d)\n", ret);
702 s->write_fd = fds[0];
703 add_close_on_fork_list(s->write_fd);
704 /* we write to this fd in do_select, so we need non-blocking */
705 fcntl(s->write_fd, F_SETFL, O_NONBLOCK);
706 gettimeofday(&s->wstime, NULL);
707 current_decoder = slot_num;
708 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
711 static void open_receiver(int format)
713 struct audio_format_info *a = &afi[format];
717 slot_num = get_empty_slot();
719 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
722 gettimeofday(&s->rtime, NULL);
724 s->receiver_node = para_calloc(sizeof(struct receiver_node));
725 s->receiver_node->conf = a->receiver_conf;
726 ret = a->receiver->open(s->receiver_node);
728 PARA_ERROR_LOG("failed to open receiver (%s)\n",
729 PARA_STRERROR(-ret));
730 free(s->receiver_node);
731 s->receiver_node = NULL;
734 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
735 audio_formats[s->format], a->receiver->name, slot_num);
738 static int is_frozen(int format)
741 struct audio_format_info *a = &afi[format];
743 gettimeofday(&now, NULL);
744 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
747 static void start_current_receiver(void)
753 i = get_audio_format_num(af_status);
756 if ((decoder_running(i) & 1) || is_frozen(i))
761 static void compute_time_diff(const struct timeval *status_time)
763 struct timeval now, tmp, diff;
766 const struct timeval max_deviation = {0, 500 * 1000};
767 const int time_smooth = 5;
769 gettimeofday(&now, NULL);
770 sign = tv_diff(status_time, &now, &diff);
771 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
772 // sign, sa_time_diff_sign);
774 sa_time_diff_sign = sign;
780 int s = tv_diff(&diff, &sa_time_diff, &tmp);
781 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
782 PARA_WARNING_LOG("time diff jump: %lims\n",
786 sa_time_diff_sign = tv_convex_combination(
787 sa_time_diff_sign * time_smooth, &sa_time_diff,
788 count > 10? sign : sign * time_smooth, &diff,
791 PARA_INFO_LOG("time diff (cur/avg): "
793 sign * diff.tv_sec, (diff.tv_usec + 500) / 1000,
794 sa_time_diff_sign * sa_time_diff.tv_sec,
795 (sa_time_diff.tv_usec + 500)/ 1000);
798 static void check_stat_line(char *line)
806 free(ringbuffer_add(stat_item_ringbuf, para_strdup(line)));
807 stat_client_write(line);
808 itemnum = stat_line_valid(line);
811 ilen = strlen(status_item_list[itemnum]);
814 playing = strstr(line, "playing")? 1 : 0;
818 af_status = para_strdup(line + ilen + 1);
821 offset_seconds = atoi(line + ilen + 1);
824 length_seconds = atoi(line + ilen + 1);
826 case SI_STREAM_START:
827 if (sscanf(line + ilen + 1, "%lu.%lu",
828 &tv.tv_sec, &tv.tv_usec) == 2)
829 server_stream_start = tv;
831 case SI_CURRENT_TIME:
832 if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
834 compute_time_diff(&tv);
839 static void handle_signal(int sig)
843 return check_sigchld();
847 PARA_EMERG_LOG("terminating on signal %d\n", sig);
848 clean_exit(EXIT_FAILURE, "caught deadly signal");
853 static void check_timeouts(void)
856 int slot_num, timeout = conf.stream_timeout_arg;
858 gettimeofday(&now, NULL);
859 FOR_EACH_SLOT(slot_num) {
860 struct slot_info *s = &slot[slot_num];
863 /* check read time */
864 if (s->receiver_node &&
865 now.tv_sec > s->rtime.tv_sec + timeout) {
866 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
867 audio_formats[s->format], slot_num);
871 close_receiver(slot_num);
873 /* check write time */
874 if (s->wpid > 0 && !s->wkilled &&
875 now.tv_sec > s->wtime.tv_sec + timeout) {
876 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
877 audio_formats[s->format], slot_num);
884 static size_t get_loaded_bytes(int slot_num)
887 struct slot_info *s = &slot[slot_num];
888 struct receiver_node *rn = s->receiver_node;
893 if (afi[s->format].num_filters) {
895 loaded = *s->fci->out_loaded;
905 static void close_decoder_if_idle(int slot_num)
907 struct slot_info *s = &slot[slot_num];
908 struct receiver_node *rn = s->receiver_node;
914 if (!rn->eof && !s->fci->error && s->wpid > 0)
916 if (!s->fci->error && s->wpid > 0) { /* eof */
917 if (filter_io(s->fci) > 0)
919 if (get_loaded_bytes(slot_num))
922 if (s->write_fd > 0) {
923 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
926 del_close_on_fork_list(s->write_fd);
930 return; /* wait until writer dies before closing filters */
931 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
933 close_filters(s->fci);
935 close_receiver(slot_num);
936 clear_slot(slot_num);
939 static int set_stream_fds(fd_set *wfds)
941 int i, max_fileno = -1;
945 struct slot_info *s = &slot[i];
946 struct audio_format_info *a;
947 struct receiver_node *rn;
949 close_decoder_if_idle(i);
954 rn = s->receiver_node;
955 if (rn && rn->loaded && !s->wpid) {
956 PARA_INFO_LOG("no writer in slot %d\n", i);
957 start_stream_writer(i);
959 if (s->write_fd <= 0)
961 if (!get_loaded_bytes(i))
963 FD_SET(s->write_fd, wfds);
965 max_fileno = MAX(s->write_fd, max_fileno);
967 // PARA_INFO_LOG("return %d\n", max_fileno);
971 static int write_audio_data(int slot_num)
973 struct slot_info *s = &slot[slot_num];
974 struct audio_format_info *a = &afi[s->format];
975 struct receiver_node *rn = s->receiver_node;
980 if (a->num_filters) {
981 buf = &s->fci->outbuf;
982 len = s->fci->out_loaded;
987 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
988 rv = write(s->write_fd, *buf, *len);
989 PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
991 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
992 slot_num, s->write_fd, strerror(errno));
994 s->fci->error = E_WRITE_AUDIO_DATA;
995 } else if (rv != *len) {
996 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
997 audio_formats[s->format], rv, *len, slot_num);
999 memmove(*buf, *buf + rv, *len);
1003 gettimeofday(&s->wtime, NULL);
1007 static void slot_io(fd_set *wfds)
1012 struct slot_info *s = &slot[i];
1013 struct receiver_node *rn = s->receiver_node;
1015 if (rn && rn->loaded)
1016 gettimeofday(&s->rtime, NULL);
1017 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1018 ret = filter_io(s->fci);
1020 s->fci->error = -ret;
1021 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1022 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1024 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1026 write_audio_data(i);
1030 static int parse_stream_command(const char *txt, char **cmd)
1032 char *p = strchr(txt, ':');
1036 return -E_MISSING_COLON;
1038 FOR_EACH_AUDIO_FORMAT(i) {
1039 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1044 return -E_UNSUPPORTED_AUDIO_FORMAT;
1047 static int add_filter(int format, char *cmdline)
1049 struct audio_format_info *a = &afi[format];
1050 int filter_num, nf = a->num_filters;
1052 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1055 a->filters[nf] = &filters[filter_num];
1057 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1058 a->filters[nf]->name);
1062 static int setup_default_filters(void)
1066 FOR_EACH_AUDIO_FORMAT(i) {
1067 struct audio_format_info *a = &afi[i];
1072 /* add "dec" to audio format name */
1073 tmp = make_message("%sdec", audio_formats[i]);
1074 for (j = 0; filters[j].name; j++)
1075 if (!strcmp(tmp, filters[j].name))
1078 ret = -E_UNSUPPORTED_FILTER;
1079 if (!filters[j].name)
1081 tmp = para_strdup(filters[j].name);
1082 ret = add_filter(i, tmp);
1086 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1087 ret = add_filter(i, "wav");
1090 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1096 static int init_stream_io(void)
1098 int i, ret, receiver_num;
1101 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1102 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1105 afi[ret].write_cmd = para_strdup(cmd);
1106 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1108 for (i = 0; receivers[i].name; i++) {
1109 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1110 receivers[i].init(&receivers[i]);
1112 for (i = 0; i < conf.receiver_given; i++) {
1113 char *arg = conf.receiver_arg[i];
1114 char *recv = strchr(arg, ':');
1115 ret = -E_MISSING_COLON;
1120 ret = get_audio_format_num(arg);
1123 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1124 if (!afi[ret].receiver_conf) {
1125 ret = -E_RECV_SYNTAX;
1128 afi[ret].receiver = &receivers[receiver_num];
1130 /* use the first available receiver with no arguments
1131 * for those audio formats for which no receiver
1134 cmd = para_strdup(receivers[0].name);
1135 FOR_EACH_AUDIO_FORMAT(i) {
1136 struct audio_format_info *a = &afi[i];
1137 if (a->receiver_conf)
1139 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1140 if (!a->receiver_conf)
1141 return -E_RECV_SYNTAX;
1142 a->receiver = &receivers[receiver_num];
1146 filter_init(filters);
1147 FOR_EACH_AUDIO_FORMAT(i) {
1148 afi[i].filter_conf = para_malloc((conf.filter_given + 1) * sizeof(char *));
1149 afi[i].filters = para_malloc((conf.filter_given + 1) * sizeof(struct filter *));
1151 if (!conf.no_default_filters_given)
1152 return setup_default_filters();
1153 for (i = 0; i < conf.filter_given; i++) {
1154 char *arg = conf.filter_arg[i];
1155 char *filter_name = strchr(arg, ':');
1156 ret = -E_MISSING_COLON;
1159 *filter_name = '\0';
1161 ret = get_audio_format_num(arg);
1164 ret = add_filter(ret, filter_name);
1173 static int dump_commands(int fd)
1175 char *buf = para_strdup(""), *tmp = NULL;
1179 FOR_EACH_COMMAND(i) {
1180 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1181 cmds[i].description);
1185 ret = client_write(fd, buf);
1191 * command handlers don't close their fd on errors (ret < 0) so that
1192 * its caller can send an error message. Otherwise (ret >= 0) it's up
1193 * to each individual command to close the fd if necessary.
1196 static int com_help(int fd, int argc, char **argv)
1200 const char *dflt = "No such command. Available commands:\n";
1203 ret = dump_commands(fd);
1206 FOR_EACH_COMMAND(i) {
1207 if (strcmp(cmds[i].name, argv[1]))
1210 "NAME\n\t%s -- %s\n"
1211 "SYNOPSIS\n\tpara_audioc %s\n"
1212 "DESCRIPTION\n%s\n",
1214 cmds[i].description,
1218 ret = client_write(fd, buf);
1222 ret = client_write(fd, dflt);
1224 ret = dump_commands(fd);
1231 static int com_stat(int fd, __unused int argc, __unused char **argv)
1234 char *buf = audiod_status_string();
1236 buf = para_strcat(buf, "\n");
1237 for (i = RINGBUFFER_SIZE - 1; i >= 0; i--) {
1238 char *tmp, *line = ringbuffer_get(stat_item_ringbuf, i);
1241 tmp = make_message("%s\n", line);
1242 buf = para_strcat(buf, tmp);
1245 ret = client_write(fd, buf);
1247 ret = stat_client_add(fd);
1253 static char *list_filters(void)
1256 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1258 FOR_EACH_AUDIO_FORMAT(i) {
1259 for (j = 0; j < afi[i].num_filters; j++) {
1260 tmp = make_message("%s\t%i\t%s\n",
1261 afi[i].name, j, afi[i].filter_cmds[j]);
1262 msg = para_strcat(msg, tmp);
1265 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1266 j, afi[i].write_cmd);
1267 msg = para_strcat(msg, tmp);
1274 static int com_grab(int fd, int argc, char **argv)
1276 struct grab_client *gc;
1277 struct filter_node *fn;
1280 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1281 gc = grab_client_new(fd, argc, argv, &err);
1282 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1285 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1287 activate_grab_client(gc, fn);
1290 if (err != -E_GC_HELP_GIVEN)
1292 err = client_write(fd, "Usage: para_audioc [audioc_options] -- "
1293 "grab [grab_options]\nAvailable options:\n");
1296 err = client_write(fd, GRAB_HELP_TXT);
1303 static int __noreturn com_term(int fd, __unused int argc, __unused char **argv)
1306 clean_exit(EXIT_SUCCESS, "terminating on user request");
1309 static int com_on(int fd, __unused int argc, __unused char **argv)
1311 audiod_status = AUDIOD_ON;
1316 static int com_off(int fd, __unused int argc, __unused char **argv)
1318 audiod_status = AUDIOD_OFF;
1323 static int com_sb(int fd, __unused int argc, __unused char **argv)
1325 audiod_status = AUDIOD_STANDBY;
1330 static int com_cycle(int fd, int argc, char **argv)
1332 switch (audiod_status) {
1334 return com_sb(fd, argc, argv);
1337 return com_on(fd, argc, argv);
1339 case AUDIOD_STANDBY:
1340 return com_off(fd, argc, argv);
1347 static int check_perms(struct ucred *c)
1351 if (!conf.user_allow_given)
1353 for (i = 0; i < conf.user_allow_given; i++)
1354 if (c->uid == conf.user_allow_arg[i])
1356 return -E_UCRED_PERM;
1359 static int handle_connect(void)
1361 int i, argc, ret, clifd = -1;
1363 char *buf = para_malloc(MAXLINE), **argv = NULL;
1364 struct sockaddr_un unix_addr;
1366 ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
1370 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1, &c);
1373 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c.pid, c.uid, c.gid, ret, buf);
1375 ret = check_perms(&c);
1378 argc = split_args(buf, &argv, '\n');
1379 PARA_INFO_LOG("argv[0]: %s\n", argv[0]);
1380 for (i = 0; cmds[i].name; i++) {
1381 if (strcmp(cmds[i].name, argv[0]))
1383 ret = cmds[i].handler(clifd, argc + 1, argv);
1386 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1390 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1391 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1392 client_write(clifd, tmp);
1399 static void audiod_get_socket(void)
1401 struct sockaddr_un unix_addr;
1403 if (conf.socket_given)
1404 socket_name = para_strdup(conf.socket_arg);
1406 char *hn = para_hostname();
1407 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1411 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1412 if (conf.force_given)
1413 unlink(socket_name);
1414 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1415 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1416 if (audiod_socket < 0) {
1417 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1418 exit(EXIT_FAILURE); /* do not unlink socket */
1420 if (listen(audiod_socket, 5) < 0) {
1421 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1422 exit(EXIT_FAILURE); /* do not unlink socket */
1424 add_close_on_fork_list(audiod_socket);
1427 static int open_stat_pipe(void)
1429 int ret, fd[3] = {-1, 1, 0};
1430 char *argv[] = {BINDIR "/para_client", "stat", NULL};
1432 ret = para_exec(&pid, BINDIR "/para_client", argv, fd);
1435 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1436 add_close_on_fork_list(ret);
1438 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1442 static int pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv)
1444 int i, ret, max = -1;
1447 struct slot_info *s = &slot[i];
1448 struct audio_format_info *a;
1449 struct receiver_node *rn = s->receiver_node;
1450 if (s->format < 0 || !rn)
1452 a = &afi[s->format];
1453 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1454 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1455 max = MAX(max, ret);
1460 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1465 struct slot_info *s = &slot[i];
1466 struct audio_format_info *a;
1467 struct receiver_node *rn = s->receiver_node;
1468 if (s->format < 0 || !rn || rn->eof)
1470 a = &afi[s->format];
1471 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1474 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1475 a->receiver->name, PARA_STRERROR(-ret), i);
1477 PARA_INFO_LOG("eof in slot %d\n", i);
1480 if (ret < 0 && s->fci)
1481 s->fci->error = ret;
1485 /* TODO: move everything before the select call to pre_select() */
1486 static void __noreturn audiod_mainloop(void)
1489 int ret, max_fileno, sbo = 0;
1490 char status_buf[STRINGSIZE] = "";
1496 if (audiod_status != AUDIOD_ON)
1497 kill_all_decoders();
1499 start_current_receiver();
1500 max_fileno = set_stream_fds(&wfds);
1501 /* stat pipe (read) */
1502 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1504 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1505 stat_pipe = open_stat_pipe();
1507 status_buf[0] = '\0';
1509 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF) {
1510 FD_SET(stat_pipe, &rfds);
1511 max_fileno = MAX(max_fileno, stat_pipe);
1513 /* always check signal pipe */
1514 FD_SET(signal_pipe, &rfds);
1515 max_fileno = MAX(max_fileno, signal_pipe);
1517 if (audiod_socket < 0)
1518 audiod_get_socket(); /* doesn't return on errors */
1519 FD_SET(audiod_socket, &rfds);
1520 max_fileno = MAX(max_fileno, audiod_socket);
1522 tv.tv_usec = 200 * 1000;
1523 ret = pre_select(&rfds, &wfds, &tv);
1524 max_fileno = MAX(max_fileno, ret);
1525 ret = select(max_fileno + 1, &rfds, &wfds, NULL, &tv);
1526 if (ret < 0 && errno != EINTR)
1527 PARA_ERROR_LOG("select returned %d (%s)\n", ret,
1529 if (audiod_status != AUDIOD_OFF)
1530 audiod_status_dump();
1533 audiod_post_select(ret, &rfds, &wfds);
1534 /* read status pipe */
1535 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1536 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1539 /* avoid busy loop if server is down */
1540 while (sleep(1) > 0)
1543 status_buf[ret + sbo] = '\0';
1544 sbo = for_each_line(status_buf, ret + sbo,
1549 if (FD_ISSET(audiod_socket, &rfds)) {
1550 ret = handle_connect();
1552 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1556 if (FD_ISSET(signal_pipe, &rfds)) {
1557 int sig_nr = para_next_signal();
1559 handle_signal(sig_nr);
1564 static void set_initial_status(void)
1566 audiod_status = AUDIOD_ON;
1567 if (!conf.mode_given)
1569 if (!strcmp(conf.mode_arg, "sb")) {
1570 audiod_status = AUDIOD_STANDBY;
1573 if (!strcmp(conf.mode_arg, "off")) {
1574 audiod_status = AUDIOD_OFF;
1577 if (strcmp(conf.mode_arg, "on"))
1578 PARA_WARNING_LOG("%s", "invalid mode\n");
1581 int __noreturn main(int argc, char *argv[])
1587 hostname = para_hostname();
1588 cmdline_parser(argc, argv, &conf);
1589 para_drop_privileges(conf.user_arg);
1590 cf = configfile_exists();
1592 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1593 fprintf(stderr, "parse error in config file\n");
1597 log_welcome("para_audiod", conf.loglevel_arg);
1598 i = init_stream_io();
1600 fprintf(stderr, "init stream io error: %s\n",
1604 server_uptime(UPTIME_SET);
1605 set_initial_status();
1608 stat_item_ringbuf = ringbuffer_new(RINGBUFFER_SIZE);
1610 setup_signal_handling();
1611 if (conf.daemon_given)