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"
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 static char *stat_item_values[NUM_STAT_ITEMS];
135 static FILE *logfile;
136 static const struct timeval restart_delay = {0, 300 * 1000};
138 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
140 static struct audiod_command cmds[] = {
143 .handler = com_cycle,
144 .description = "switch to next mode",
148 "on -> standby -> off -> on\n"
154 .description = "grab the audio stream",
155 .synopsis = "-- grab [grab_options]",
158 "grab ('splice') the audio stream at any position in the filter \n"
159 "chain and send that data back to the client. Try\n"
160 "\t para_audioc -- grab -h\n"
161 "for the list of available options.\n"
167 .description = "display command list or help for given command",
168 .synopsis = "help [command]",
171 "When I was younger, so much younger than today, I never needed\n"
172 "anybody's help in any way. But now these days are gone, I'm not so\n"
173 "self assured. Now I find I've changed my mind and opened up the doors.\n"
175 " -- Beatles: Help\n"
181 .description = "deactivate para_audiod",
185 "Close connection to para_server and stop all decoders.\n"
191 .description = "activate para_audiod",
195 "Establish connection to para_server, retrieve para_server's current\n"
196 "status. If playing, start corresponding decoder. Otherwise stop\n"
203 .description = "enter standby mode",
207 "Stop all decoders but leave connection to para_server open.\n"
213 .description = "print status information",
214 .synopsis = "stat [item1 ...]",
217 "Dump given status items (all if none given) to stdout.\n"
223 .description = "terminate audiod",
227 "Stop all decoders, shut down connection to para_server and exit.\n"
235 /** iterate over all slots */
236 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
237 /** iterate over all supported audio formats */
238 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
239 /** iterate over the array of all audiod commands */
240 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
243 * get the audio format number
244 * \param name the name of the audio format
246 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
247 * \a name is not a supported audio format.
249 int get_audio_format_num(char *name)
252 FOR_EACH_AUDIO_FORMAT(i)
253 if (!strcmp(name, audio_formats[i]))
255 return -E_UNSUPPORTED_AUDIO_FORMAT;
259 * log function. first argument is loglevel.
261 void para_log(int ll, const char* fmt,...)
267 char str[MAXLINE] = "";
269 if (ll < conf.loglevel_arg)
271 outfd = logfile? logfile : stderr;
274 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
275 fprintf(outfd, "%s %s ", str, hostname);
276 if (conf.loglevel_arg <= INFO)
277 fprintf(outfd, "%i ", ll);
279 vfprintf(outfd, fmt, argp);
283 static int client_write(int fd, const char *buf)
285 size_t len = strlen(buf);
286 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
289 static char *get_time_string(struct timeval *newest_stime)
291 struct timeval now, diff, adj_stream_start, tmp;
292 int total = 0, use_server_time = 1;
297 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
299 if (audiod_status == AUDIOD_OFF)
301 if (sa_time_diff_sign > 0)
302 tv_diff(&server_stream_start, &sa_time_diff,
305 tv_add(&server_stream_start, &sa_time_diff,
307 tmp = adj_stream_start;
308 if (newest_stime && audiod_status == AUDIOD_ON) {
309 tv_diff(newest_stime, &adj_stream_start, &diff);
310 if (tv2ms(&diff) < 5000) {
315 gettimeofday(&now, NULL);
316 tv_diff(&now, &tmp, &diff);
317 total = diff.tv_sec + offset_seconds;
318 if (total > length_seconds)
319 total = length_seconds;
324 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
325 status_item_list[SI_PLAY_TIME],
326 use_server_time? "~" : "",
329 (length_seconds - total) / 60,
330 (length_seconds - total) % 60,
331 length_seconds? (total * 100 + length_seconds / 2) /
338 __malloc static char *audiod_status_string(void)
340 const char *status = (audiod_status == AUDIOD_ON)?
341 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
342 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
345 static struct timeval *wstime(void)
348 struct timeval *max = NULL;
350 struct slot_info *s = &slot[i];
353 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
359 __malloc static char *decoder_flags(void)
362 char decoder_flags[MAX_STREAM_SLOTS + 1];
365 struct slot_info *s = &slot[i];
367 if (s->receiver_node)
372 flag += s->format * 4;
373 decoder_flags[i] = flag;
375 decoder_flags[MAX_STREAM_SLOTS] = '\0';
376 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
380 static char *configfile_exists(void)
382 static char *config_file;
385 char *home = para_homedir();
386 config_file = make_message("%s/.paraslash/audiod.conf", home);
389 return file_exists(config_file)? config_file : NULL;
392 static void setup_signal_handling(void)
394 signal_pipe = para_signal_init();
395 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
396 para_install_sighandler(SIGINT);
397 para_install_sighandler(SIGTERM);
398 para_install_sighandler(SIGCHLD);
399 para_install_sighandler(SIGHUP);
400 signal(SIGPIPE, SIG_IGN);
403 static void audiod_status_dump(void)
405 static char *p_ts, *p_us, *p_as, *p_df;
406 struct timeval *t = wstime();
407 char *us, *tmp = get_time_string(t);
409 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
410 stat_client_write(tmp, SI_PLAY_TIME);
415 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
417 if (!p_us || strcmp(p_us, tmp))
418 stat_client_write(tmp, SI_AUDIOD_UPTIME);
422 tmp = audiod_status_string();
423 if (!p_as || strcmp(p_as, tmp))
424 stat_client_write(tmp, SI_AUDIOD_STATUS);
428 tmp = decoder_flags();
429 if (!p_df || strcmp(p_df, tmp))
430 stat_client_write(tmp, SI_DECODER_FLAGS);
435 static void clear_slot(int slot_num)
437 struct slot_info *s = &slot[slot_num];
439 PARA_INFO_LOG("clearing slot %d\n", slot_num);
440 memset(s, 0, sizeof(struct slot_info));
444 static void kill_stream_writer(int slot_num)
446 struct slot_info *s = &slot[slot_num];
448 if (s->format < 0 || s->wkilled || s->wpid <= 0)
450 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
451 s->wpid, audio_formats[s->format], slot_num);
452 kill(s->wpid, SIGTERM);
457 static void set_restart_barrier(int format, struct timeval *now)
464 gettimeofday(&tmp, NULL);
465 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
468 static void close_receiver(int slot_num)
470 struct slot_info *s = &slot[slot_num];
471 struct audio_format_info *a;
473 if (s->format < 0 || !s->receiver_node)
476 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
477 audio_formats[s->format] , slot_num);
478 a->receiver->close(s->receiver_node);
479 free(s->receiver_node);
480 s->receiver_node = NULL;
481 set_restart_barrier(s->format, NULL);
484 static void kill_all_decoders(void)
489 if (slot[i].format >= 0) {
490 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
491 kill_stream_writer(i);
495 static void check_sigchld(void)
500 gettimeofday(&now, NULL);
503 pid = para_reap_child();
507 struct slot_info *s = &slot[i];
511 if (pid == s->wpid) {
513 lifetime = now.tv_sec - s->wstime.tv_sec;
514 PARA_INFO_LOG("%s stream writer in slot %d died "
516 audio_formats[s->format], i, lifetime);
517 set_restart_barrier(s->format, &now);
518 goto reap_next_child;
521 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
522 goto reap_next_child;
525 static int get_empty_slot(void)
536 if (s->write_fd > 0 || s->wpid > 0)
538 if (s->receiver_node)
545 return -E_NO_MORE_SLOTS;
548 static int decoder_running(int format)
555 if (s->format == format && s->receiver_node)
557 if (s->format == format && s->wpid > 0)
563 static void close_stat_pipe(void)
569 PARA_NOTICE_LOG("%s", "closing status pipe\n");
571 del_close_on_fork_list(stat_pipe);
574 for (i = 0; i < NUM_STAT_ITEMS; i++) {
575 free(stat_item_values[i]);
576 stat_item_values[i] = NULL;
581 audiod_status_dump();
583 stat_item_values[SI_STATUS_BAR] = make_message("%s:no connection to para_server\n",
584 status_item_list[SI_STATUS_BAR]);
585 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
588 static void __noreturn clean_exit(int status, const char *msg)
590 PARA_EMERG_LOG("%s\n", msg);
599 __malloc static char *glob_cmd(char *cmd)
601 char *ret, *replacement;
602 struct timeval tmp, delay, rss; /* real stream start */
604 delay.tv_sec = conf.stream_delay_arg / 1000;
605 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
606 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
607 if (sa_time_diff_sign < 0)
608 tv_add(&server_stream_start, &sa_time_diff, &rss);
610 tv_diff(&server_stream_start, &sa_time_diff, &rss);
611 tv_add(&rss, &delay, &tmp);
612 replacement = make_message("%lu:%lu",
613 (long unsigned)tmp.tv_sec,
614 (long unsigned)tmp.tv_usec);
615 ret = s_a_r(cmd, "STREAM_START", replacement);
619 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
624 /** get the number of filters for the given audio format */
625 int num_filters(int audio_format_num)
627 return afi[audio_format_num].num_filters;
630 static void open_filters(int slot_num)
632 struct slot_info *s = &slot[slot_num];
633 struct audio_format_info *a = &afi[s->format];
634 int nf = a->num_filters;
637 s->fci = para_calloc(sizeof(struct filter_chain_info));
638 INIT_LIST_HEAD(&s->fci->filters);
641 s->fci->inbuf = s->receiver_node->buf;
642 s->fci->in_loaded = &s->receiver_node->loaded;
643 s->fci->outbuf = s->receiver_node->buf;
644 s->fci->out_loaded = &s->receiver_node->loaded;
645 s->fci->eof = &s->receiver_node->eof;
646 for (i = 0; i < nf; i++) {
647 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
648 fn->conf = a->filter_conf[i];
650 fn->filter = a->filters[i];
651 INIT_LIST_HEAD(&fn->callbacks);
652 list_add_tail(&fn->node, &s->fci->filters);
653 fn->filter->open(fn);
654 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
655 audio_formats[s->format], i + 1, nf,
656 fn->filter->name, slot_num);
657 s->fci->outbuf = fn->buf;
658 s->fci->out_loaded = &fn->loaded;
660 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
664 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
666 struct filter_node *fn;
670 struct slot_info *s = &slot[i];
671 if (s->format < 0 || !s->fci)
673 if (slot_num >= 0 && slot_num != i)
675 if (format >= 0 && s->format != format)
677 if (num_filters(i) < filternum)
681 list_for_each_entry(fn, &s->fci->filters, node)
682 if (filternum <= 0 || j++ == filternum)
689 static void start_stream_writer(int slot_num)
691 int ret, fds[3] = {1, -1, -1};
692 struct slot_info *s = &slot[slot_num];
693 struct audio_format_info *a = &afi[s->format];
697 glob = glob_cmd(a->write_cmd);
699 glob = para_strdup("para_write -w alsa");
700 PARA_INFO_LOG("starting stream writer: %s\n", glob);
701 open_filters(slot_num);
702 ret = para_exec_cmdline_pid(&s->wpid, glob, fds);
705 PARA_ERROR_LOG("exec failed (%d)\n", ret);
708 s->write_fd = fds[0];
709 add_close_on_fork_list(s->write_fd);
710 /* we write to this fd in do_select, so we need non-blocking */
711 mark_fd_nonblock(s->write_fd);
712 gettimeofday(&s->wstime, NULL);
713 current_decoder = slot_num;
714 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
717 static void open_receiver(int format)
719 struct audio_format_info *a = &afi[format];
723 slot_num = get_empty_slot();
725 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
728 gettimeofday(&s->rtime, NULL);
730 s->receiver_node = para_calloc(sizeof(struct receiver_node));
731 s->receiver_node->conf = a->receiver_conf;
732 ret = a->receiver->open(s->receiver_node);
734 PARA_ERROR_LOG("failed to open receiver (%s)\n",
735 PARA_STRERROR(-ret));
736 free(s->receiver_node);
737 s->receiver_node = NULL;
740 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
741 audio_formats[s->format], a->receiver->name, slot_num);
744 static int is_frozen(int format)
747 struct audio_format_info *a = &afi[format];
749 gettimeofday(&now, NULL);
750 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
753 static void start_current_receiver(void)
759 i = get_audio_format_num(af_status);
762 if ((decoder_running(i) & 1) || is_frozen(i))
767 static void compute_time_diff(const struct timeval *status_time)
769 struct timeval now, tmp, diff;
772 const struct timeval max_deviation = {0, 500 * 1000};
773 const int time_smooth = 5;
775 gettimeofday(&now, NULL);
776 sign = tv_diff(status_time, &now, &diff);
777 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
778 // sign, sa_time_diff_sign);
780 sa_time_diff_sign = sign;
786 int s = tv_diff(&diff, &sa_time_diff, &tmp);
787 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
788 PARA_WARNING_LOG("time diff jump: %lims\n",
792 sa_time_diff_sign = tv_convex_combination(
793 sa_time_diff_sign * time_smooth, &sa_time_diff,
794 count > 10? sign : sign * time_smooth, &diff,
797 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
800 sa_time_diff_sign ? "+" : "-",
805 static void check_stat_line(char *line)
809 long unsigned sec, usec;
812 PARA_INFO_LOG("line: %s\n", line);
815 itemnum = stat_line_valid(line);
817 PARA_WARNING_LOG("invalid status line: %s\n", line);
820 tmp = make_message("%s\n", line);
821 stat_client_write(tmp, itemnum);
823 free(stat_item_values[itemnum]);
824 stat_item_values[itemnum] = para_strdup(line);
825 ilen = strlen(status_item_list[itemnum]);
828 playing = strstr(line, "playing")? 1 : 0;
832 af_status = para_strdup(line + ilen + 1);
835 offset_seconds = atoi(line + ilen + 1);
838 length_seconds = atoi(line + ilen + 1);
840 case SI_STREAM_START:
841 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
842 server_stream_start.tv_sec = sec;
843 server_stream_start.tv_usec = usec;
846 case SI_CURRENT_TIME:
847 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
848 struct timeval tv = {sec, usec};
849 compute_time_diff(&tv);
855 static void handle_signal(int sig)
859 return check_sigchld();
863 PARA_EMERG_LOG("terminating on signal %d\n", sig);
864 clean_exit(EXIT_FAILURE, "caught deadly signal");
869 static void check_timeouts(void)
872 int slot_num, timeout = conf.stream_timeout_arg;
874 gettimeofday(&now, NULL);
875 FOR_EACH_SLOT(slot_num) {
876 struct slot_info *s = &slot[slot_num];
879 /* check read time */
880 if (s->receiver_node &&
881 now.tv_sec > s->rtime.tv_sec + timeout) {
882 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
883 audio_formats[s->format], slot_num);
887 close_receiver(slot_num);
889 /* check write time */
890 if (s->wpid > 0 && !s->wkilled &&
891 now.tv_sec > s->wtime.tv_sec + timeout) {
892 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
893 audio_formats[s->format], slot_num);
900 static size_t get_loaded_bytes(int slot_num)
903 struct slot_info *s = &slot[slot_num];
904 struct receiver_node *rn = s->receiver_node;
909 if (afi[s->format].num_filters) {
911 loaded = *s->fci->out_loaded;
921 static void close_decoder_if_idle(int slot_num)
923 struct slot_info *s = &slot[slot_num];
924 struct receiver_node *rn = s->receiver_node;
930 if (!rn->eof && !s->fci->error && s->wpid > 0)
932 if (!s->fci->error && s->wpid > 0) { /* eof */
933 if (filter_io(s->fci) > 0)
935 if (get_loaded_bytes(slot_num))
938 if (s->write_fd > 0) {
939 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
942 del_close_on_fork_list(s->write_fd);
946 return; /* wait until writer dies before closing filters */
947 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
949 close_filters(s->fci);
951 close_receiver(slot_num);
952 clear_slot(slot_num);
955 static void set_stream_fds(fd_set *wfds, int *max_fileno)
961 struct slot_info *s = &slot[i];
962 struct audio_format_info *a;
963 struct receiver_node *rn;
965 close_decoder_if_idle(i);
970 rn = s->receiver_node;
971 if (rn && rn->loaded && !s->wpid) {
972 PARA_INFO_LOG("no writer in slot %d\n", i);
973 start_stream_writer(i);
975 if (s->write_fd <= 0)
977 if (!get_loaded_bytes(i))
979 para_fd_set(s->write_fd, wfds, max_fileno);
984 static int write_audio_data(int slot_num)
986 struct slot_info *s = &slot[slot_num];
987 struct audio_format_info *a = &afi[s->format];
988 struct receiver_node *rn = s->receiver_node;
993 if (a->num_filters) {
994 buf = &s->fci->outbuf;
995 len = s->fci->out_loaded;
1000 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
1001 rv = write(s->write_fd, *buf, *len);
1002 PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
1004 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
1005 slot_num, s->write_fd, strerror(errno));
1007 s->fci->error = E_WRITE_AUDIO_DATA;
1008 } else if (rv != *len) {
1009 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
1010 audio_formats[s->format], rv, *len, slot_num);
1012 memmove(*buf, *buf + rv, *len);
1016 gettimeofday(&s->wtime, NULL);
1020 static void slot_io(fd_set *wfds)
1025 struct slot_info *s = &slot[i];
1026 struct receiver_node *rn = s->receiver_node;
1028 if (rn && rn->loaded)
1029 gettimeofday(&s->rtime, NULL);
1030 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1031 ret = filter_io(s->fci);
1033 s->fci->error = -ret;
1034 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1035 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1037 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1039 write_audio_data(i);
1043 static int parse_stream_command(const char *txt, char **cmd)
1045 char *p = strchr(txt, ':');
1049 return -E_MISSING_COLON;
1051 FOR_EACH_AUDIO_FORMAT(i) {
1052 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1057 return -E_UNSUPPORTED_AUDIO_FORMAT;
1060 static int add_filter(int format, char *cmdline)
1062 struct audio_format_info *a = &afi[format];
1063 int filter_num, nf = a->num_filters;
1065 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1068 a->filters[nf] = &filters[filter_num];
1070 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1071 a->filters[nf]->name);
1075 static int setup_default_filters(void)
1079 FOR_EACH_AUDIO_FORMAT(i) {
1080 struct audio_format_info *a = &afi[i];
1085 /* add "dec" to audio format name */
1086 tmp = make_message("%sdec", audio_formats[i]);
1087 for (j = 0; filters[j].name; j++)
1088 if (!strcmp(tmp, filters[j].name))
1091 ret = -E_UNSUPPORTED_FILTER;
1092 if (!filters[j].name)
1094 tmp = para_strdup(filters[j].name);
1095 ret = add_filter(i, tmp);
1099 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1100 ret = add_filter(i, para_strdup("wav"));
1103 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1109 static int init_stream_io(void)
1111 int i, ret, receiver_num, nf;
1114 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1115 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1118 afi[ret].write_cmd = para_strdup(cmd);
1119 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1121 for (i = 0; receivers[i].name; i++) {
1122 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1123 receivers[i].init(&receivers[i]);
1125 for (i = 0; i < conf.receiver_given; i++) {
1126 char *arg = conf.receiver_arg[i];
1127 char *recv = strchr(arg, ':');
1128 ret = -E_MISSING_COLON;
1133 ret = get_audio_format_num(arg);
1136 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1137 if (!afi[ret].receiver_conf) {
1138 ret = -E_RECV_SYNTAX;
1141 afi[ret].receiver = &receivers[receiver_num];
1143 /* use the first available receiver with no arguments
1144 * for those audio formats for which no receiver
1147 cmd = para_strdup(receivers[0].name);
1148 FOR_EACH_AUDIO_FORMAT(i) {
1149 struct audio_format_info *a = &afi[i];
1150 if (a->receiver_conf)
1152 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1153 if (!a->receiver_conf)
1154 return -E_RECV_SYNTAX;
1155 a->receiver = &receivers[receiver_num];
1159 filter_init(filters);
1160 nf = PARA_MAX(2, conf.filter_given) + 1;
1161 PARA_INFO_LOG("allocating space for %d filters\n", nf);
1162 FOR_EACH_AUDIO_FORMAT(i) {
1163 afi[i].filter_conf = para_malloc(nf * sizeof(char *));
1164 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1166 if (!conf.no_default_filters_given)
1167 return setup_default_filters();
1168 for (i = 0; i < conf.filter_given; i++) {
1169 char *arg = conf.filter_arg[i];
1170 char *filter_name = strchr(arg, ':');
1171 ret = -E_MISSING_COLON;
1174 *filter_name = '\0';
1176 ret = get_audio_format_num(arg);
1179 ret = add_filter(ret, filter_name);
1188 static int dump_commands(int fd)
1190 char *buf = para_strdup(""), *tmp = NULL;
1194 FOR_EACH_COMMAND(i) {
1195 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1196 cmds[i].description);
1200 ret = client_write(fd, buf);
1206 * command handlers don't close their fd on errors (ret < 0) so that
1207 * its caller can send an error message. Otherwise (ret >= 0) it's up
1208 * to each individual command to close the fd if necessary.
1211 static int com_help(int fd, int argc, char **argv)
1215 const char *dflt = "No such command. Available commands:\n";
1218 ret = dump_commands(fd);
1221 FOR_EACH_COMMAND(i) {
1222 if (strcmp(cmds[i].name, argv[1]))
1225 "NAME\n\t%s -- %s\n"
1226 "SYNOPSIS\n\tpara_audioc %s\n"
1227 "DESCRIPTION\n%s\n",
1229 cmds[i].description,
1233 ret = client_write(fd, buf);
1237 ret = client_write(fd, dflt);
1239 ret = dump_commands(fd);
1246 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1250 long unsigned mask = ~0LU;
1254 for (i = 1; i < argc; i++) {
1255 ret = stat_item_valid(argv[i]);
1261 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1262 if (mask & (1 << SI_PLAY_TIME)) {
1263 struct timeval *t = wstime();
1264 char *ts = get_time_string(t);
1266 ret = client_write(fd, ts);
1272 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1273 char *tmp, *us = uptime_str();
1274 tmp = make_message("%s:%s\n",
1275 status_item_list[SI_AUDIOD_UPTIME], us);
1277 ret = client_write(fd, tmp);
1282 if (mask & (1 << SI_AUDIOD_STATUS)) {
1283 char *s = audiod_status_string();
1284 ret = client_write(fd, s);
1289 if (mask & (1 << SI_DECODER_FLAGS)) {
1290 char *df =decoder_flags();
1291 ret = client_write(fd, df);
1297 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1299 if (!((1 << i) & mask))
1301 v = stat_item_values[i];
1302 tmp = make_message("%s%s%s", buf? buf: "",
1303 v? v : "", v? "\n" : "");
1307 ret = client_write(fd, buf);
1310 ret = stat_client_add(fd, mask);
1316 static char *list_filters(void)
1319 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1321 FOR_EACH_AUDIO_FORMAT(i) {
1322 for (j = 0; j < afi[i].num_filters; j++) {
1323 tmp = make_message("%s\t%i\t%s\n",
1324 afi[i].name, j, afi[i].filter_cmds[j]);
1325 msg = para_strcat(msg, tmp);
1328 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1329 j, afi[i].write_cmd);
1330 msg = para_strcat(msg, tmp);
1337 static int com_grab(int fd, int argc, char **argv)
1339 struct grab_client *gc;
1340 struct filter_node *fn;
1344 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1345 gc = grab_client_new(fd, argc, argv, &err);
1346 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1349 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1351 activate_grab_client(gc, fn);
1354 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1356 if (err == -E_GC_HELP_GIVEN) {
1357 msg = make_message("%s\n\n", grab_client_args_info_usage);
1358 for (i = 0; grab_client_args_info_help[i]; i++) {
1359 char *tmp = make_message("%s%s\n", msg,
1360 grab_client_args_info_help[i]);
1365 msg = make_message("%s %s\n",
1366 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1367 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1368 err = client_write(fd, msg);
1376 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1379 clean_exit(EXIT_SUCCESS, "terminating on user request");
1382 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1384 audiod_status = AUDIOD_ON;
1389 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1391 audiod_status = AUDIOD_OFF;
1396 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1398 audiod_status = AUDIOD_STANDBY;
1403 static int com_cycle(int fd, int argc, char **argv)
1405 switch (audiod_status) {
1407 return com_sb(fd, argc, argv);
1410 return com_on(fd, argc, argv);
1412 case AUDIOD_STANDBY:
1413 return com_off(fd, argc, argv);
1420 static int check_perms(uid_t uid)
1424 if (!conf.user_allow_given)
1426 for (i = 0; i < conf.user_allow_given; i++)
1427 if (uid == conf.user_allow_arg[i])
1429 return -E_UCRED_PERM;
1432 static int handle_connect(void)
1434 int i, argc, ret, clifd = -1;
1435 char *buf = para_malloc(MAXLINE), **argv = NULL;
1436 struct sockaddr_un unix_addr;
1438 ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
1442 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1445 PARA_INFO_LOG("connection from user %i\n", ret);
1446 ret = check_perms(ret);
1449 argc = split_args(buf, &argv, "\n");
1450 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1451 for (i = 0; cmds[i].name; i++) {
1452 if (strcmp(cmds[i].name, argv[0]))
1454 ret = cmds[i].handler(clifd, argc, argv);
1457 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1461 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1462 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1463 client_write(clifd, tmp);
1470 static void audiod_get_socket(void)
1472 struct sockaddr_un unix_addr;
1474 if (conf.socket_given)
1475 socket_name = para_strdup(conf.socket_arg);
1477 char *hn = para_hostname();
1478 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1482 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1483 if (conf.force_given)
1484 unlink(socket_name);
1485 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1486 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1487 if (audiod_socket < 0) {
1488 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1489 exit(EXIT_FAILURE); /* do not unlink socket */
1491 if (listen(audiod_socket, 5) < 0) {
1492 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1493 exit(EXIT_FAILURE); /* do not unlink socket */
1495 add_close_on_fork_list(audiod_socket);
1498 static int open_stat_pipe(void)
1500 int ret, fd[3] = {-1, 1, 0};
1502 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1505 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1506 add_close_on_fork_list(ret);
1508 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1512 static void audiod_pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv,
1518 struct slot_info *s = &slot[i];
1519 struct audio_format_info *a;
1520 struct receiver_node *rn = s->receiver_node;
1521 if (s->format < 0 || !rn)
1523 a = &afi[s->format];
1524 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1525 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1526 *max_fileno = PARA_MAX(*max_fileno, ret);
1529 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1534 struct slot_info *s = &slot[i];
1535 struct audio_format_info *a;
1536 struct receiver_node *rn = s->receiver_node;
1537 if (s->format < 0 || !rn || rn->eof)
1539 a = &afi[s->format];
1540 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1543 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1544 a->receiver->name, PARA_STRERROR(-ret), i);
1546 PARA_INFO_LOG("eof in slot %d\n", i);
1549 if (ret < 0 && s->fci)
1550 s->fci->error = ret;
1554 /* TODO: move everything before the select call to pre_select() */
1555 static void __noreturn audiod_mainloop(void)
1558 int ret, max_fileno, sbo = 0;
1559 char status_buf[STRINGSIZE] = "";
1564 /* always check signal pipe and the local socket */
1565 FD_SET(signal_pipe, &rfds);
1566 max_fileno = signal_pipe;
1567 para_fd_set(audiod_socket, &rfds, &max_fileno);
1569 if (audiod_status != AUDIOD_ON)
1570 kill_all_decoders();
1572 start_current_receiver();
1574 set_stream_fds(&wfds, &max_fileno);
1576 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1578 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1579 stat_pipe = open_stat_pipe();
1581 status_buf[0] = '\0';
1583 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF)
1584 para_fd_set(stat_pipe, &rfds, &max_fileno);
1587 tv.tv_usec = 200 * 1000;
1588 audiod_pre_select(&rfds, &wfds, &tv, &max_fileno);
1589 ret = para_select(max_fileno + 1, &rfds, &wfds, &tv);
1592 if (audiod_status != AUDIOD_OFF)
1593 audiod_status_dump();
1594 audiod_post_select(ret, &rfds, &wfds);
1595 /* read status pipe */
1596 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1597 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1600 /* avoid busy loop if server is down */
1601 while (sleep(1) > 0)
1604 status_buf[ret + sbo] = '\0';
1605 sbo = for_each_line(status_buf, ret + sbo,
1610 if (FD_ISSET(audiod_socket, &rfds)) {
1611 ret = handle_connect();
1613 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1617 if (FD_ISSET(signal_pipe, &rfds)) {
1618 int sig_nr = para_next_signal();
1620 handle_signal(sig_nr);
1625 static void set_initial_status(void)
1627 audiod_status = AUDIOD_ON;
1628 if (!conf.mode_given)
1630 if (!strcmp(conf.mode_arg, "sb")) {
1631 audiod_status = AUDIOD_STANDBY;
1634 if (!strcmp(conf.mode_arg, "off")) {
1635 audiod_status = AUDIOD_OFF;
1638 if (strcmp(conf.mode_arg, "on"))
1639 PARA_WARNING_LOG("%s", "invalid mode\n");
1642 int __noreturn main(int argc, char *argv[])
1647 fprintf(stderr, "argc: %d\n", argc);
1649 hostname = para_hostname();
1650 cmdline_parser(argc, argv, &conf);
1651 para_drop_privileges(conf.user_arg, conf.group_arg);
1652 cf = configfile_exists();
1654 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1655 PARA_EMERG_LOG("%s", "parse error in config file\n");
1659 if (conf.logfile_given)
1660 logfile = open_log(conf.logfile_arg);
1661 log_welcome("para_audiod", conf.loglevel_arg);
1662 i = init_stream_io();
1664 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1667 server_uptime(UPTIME_SET);
1668 set_initial_status();
1672 setup_signal_handling();
1673 if (conf.daemon_given)
1675 audiod_get_socket(); /* doesn't return on errors */