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, 300 * 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_off(int, int, char **);
172 static int com_on(int, int, char **);
173 static int com_sb(int, int, char **);
174 static int com_stat(int, int, char **);
175 static int com_term(int, int, char **);
176 static struct audiod_command cmds[] = {
179 .handler = com_cycle,
180 .description = "switch to next mode",
184 "on -> standby -> off -> on\n"
189 .line_handler = com_grab,
190 .description = "grab the audio stream",
191 .synopsis = "-- grab [grab_options]",
194 "grab ('splice') the audio stream at any position in the filter \n"
195 "chain and send that data back to the client. Try\n"
196 "\t para_audioc -- grab -h\n"
197 "for the list of available options.\n"
203 .description = "display command list or help for given command",
204 .synopsis = "help [command]",
207 "When I was younger, so much younger than today, I never needed\n"
208 "anybody's help in any way. But now these days are gone, I'm not so\n"
209 "self assured. Now I find I've changed my mind and opened up the doors.\n"
211 " -- Beatles: Help\n"
217 .description = "deactivate para_audiod",
221 "Close connection to para_server and stop all decoders.\n"
227 .description = "activate para_audiod",
231 "Establish connection to para_server, retrieve para_server's current\n"
232 "status. If playing, start corresponding decoder. Otherwise stop\n"
239 .description = "enter standby mode",
243 "Stop all decoders but leave connection to para_server open.\n"
249 .description = "print status information",
250 .synopsis = "stat [item1 ...]",
253 "Dump given status items (all if none given) to stdout.\n"
259 .description = "terminate audiod",
263 "Stop all decoders, shut down connection to para_server and exit.\n"
271 /** iterate over all slots */
272 #define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
273 /** iterate over all supported audio formats */
274 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
275 /** iterate over the array of all audiod commands */
276 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
279 * get the audio format number
280 * \param name the name of the audio format
282 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
283 * \a name is not a supported audio format.
285 int get_audio_format_num(char *name)
288 FOR_EACH_AUDIO_FORMAT(i)
289 if (!strcmp(name, audio_formats[i]))
291 return -E_UNSUPPORTED_AUDIO_FORMAT;
295 * log function. first argument is loglevel.
297 void para_log(int ll, const char* fmt,...)
303 char str[MAXLINE] = "";
305 if (ll < conf.loglevel_arg)
307 outfd = logfile? logfile : stderr;
310 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
311 fprintf(outfd, "%s %s ", str, hostname);
312 if (conf.loglevel_arg <= INFO)
313 fprintf(outfd, "%i ", ll);
315 vfprintf(outfd, fmt, argp);
319 static int client_write(int fd, const char *buf)
321 size_t len = strlen(buf);
322 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
325 static char *get_time_string(struct timeval *newest_stime)
327 struct timeval diff, adj_stream_start, tmp;
328 int total = 0, use_server_time = 1;
333 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
335 if (audiod_status == AUDIOD_OFF)
337 if (sa_time_diff_sign > 0)
338 tv_diff(&server_stream_start, &sa_time_diff,
341 tv_add(&server_stream_start, &sa_time_diff,
343 tmp = adj_stream_start;
344 if (newest_stime && audiod_status == AUDIOD_ON) {
345 tv_diff(newest_stime, &adj_stream_start, &diff);
346 if (tv2ms(&diff) < 5000) {
351 tv_diff(now, &tmp, &diff);
352 total = diff.tv_sec + offset_seconds;
353 if (total > length_seconds)
354 total = length_seconds;
359 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
360 status_item_list[SI_PLAY_TIME],
361 use_server_time? "~" : "",
364 (length_seconds - total) / 60,
365 (length_seconds - total) % 60,
366 length_seconds? (total * 100 + length_seconds / 2) /
373 __malloc static char *audiod_status_string(void)
375 const char *status = (audiod_status == AUDIOD_ON)?
376 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
377 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
380 static struct timeval *wstime(void)
383 struct timeval *max = NULL;
385 struct slot_info *s = &slot[i];
388 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
394 __malloc static char *decoder_flags(void)
397 char decoder_flags[MAX_STREAM_SLOTS + 1];
400 struct slot_info *s = &slot[i];
402 if (s->receiver_node)
406 decoder_flags[i] = flag;
408 decoder_flags[MAX_STREAM_SLOTS] = '\0';
409 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
413 static char *configfile_exists(void)
415 static char *config_file;
418 char *home = para_homedir();
419 config_file = make_message("%s/.paraslash/audiod.conf", home);
422 return file_exists(config_file)? config_file : NULL;
425 static void setup_signal_handling(void)
427 sig_task->fd = para_signal_init();
428 PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
429 para_install_sighandler(SIGINT);
430 para_install_sighandler(SIGTERM);
431 para_install_sighandler(SIGCHLD);
432 para_install_sighandler(SIGHUP);
433 signal(SIGPIPE, SIG_IGN);
436 static void audiod_status_dump(void)
438 static char *p_ts, *p_us, *p_as, *p_df;
439 struct timeval *t = wstime();
440 char *us, *tmp = get_time_string(t);
442 if (tmp && (!p_ts || strcmp(tmp, p_ts)))
443 stat_client_write(tmp, SI_PLAY_TIME);
448 tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
450 if (!p_us || strcmp(p_us, tmp))
451 stat_client_write(tmp, SI_AUDIOD_UPTIME);
455 tmp = audiod_status_string();
456 if (!p_as || strcmp(p_as, tmp))
457 stat_client_write(tmp, SI_AUDIOD_STATUS);
461 tmp = decoder_flags();
462 if (!p_df || strcmp(p_df, tmp))
463 stat_client_write(tmp, SI_DECODER_FLAGS);
468 static void clear_slot(int slot_num)
470 struct slot_info *s = &slot[slot_num];
472 PARA_INFO_LOG("clearing slot %d\n", slot_num);
473 memset(s, 0, sizeof(struct slot_info));
477 static void close_receiver(int slot_num)
479 struct slot_info *s = &slot[slot_num];
480 struct audio_format_info *a;
482 if (s->format < 0 || !s->receiver_node)
485 PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
486 audio_formats[s->format] , slot_num, s->receiver_node->eof);
487 if (!s->receiver_node->eof)
488 unregister_task(&s->receiver_node->task);
489 a->receiver->close(s->receiver_node);
490 free(s->receiver_node);
491 s->receiver_node = NULL;
492 /* set restart barrier */
493 tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
496 static void kill_all_decoders(void)
501 struct slot_info *s = &slot[i];
502 if (s->receiver_node)
503 s->receiver_node->eof = 1;
507 static int get_empty_slot(void)
518 if (s->wng || s->receiver_node || s->fc)
523 return -E_NO_MORE_SLOTS;
526 static int decoder_running(int format)
533 if (s->format == format && s->receiver_node)
535 if (s->format == format && s->wng)
541 static void close_stat_pipe(void)
545 if (stat_task->fd < 0)
547 PARA_NOTICE_LOG("%s", "closing status pipe\n");
548 close(stat_task->fd);
549 del_close_on_fork_list(stat_task->fd);
552 for (i = 0; i < NUM_STAT_ITEMS; i++) {
553 free(stat_item_values[i]);
554 stat_item_values[i] = NULL;
559 audiod_status_dump();
561 stat_item_values[SI_STATUS_BAR] = make_message(
562 "%s:no connection to para_server\n",
563 status_item_list[SI_STATUS_BAR]);
564 stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
567 static void __noreturn clean_exit(int status, const char *msg)
569 PARA_EMERG_LOG("%s\n", msg);
572 if (stat_task->fd >= 0)
578 * get the number of filters
580 * \param audio_format_num the number identifying the audio format
582 * \return the number of filters for the given audio format
586 int num_filters(int audio_format_num)
588 return afi[audio_format_num].num_filters;
591 static void filter_event_handler(struct task *t)
593 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
597 static void open_filters(int slot_num)
599 struct slot_info *s = &slot[slot_num];
600 struct audio_format_info *a = &afi[s->format];
601 int nf = a->num_filters;
607 PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
608 s->fc = para_calloc(sizeof(struct filter_chain));
609 INIT_LIST_HEAD(&s->fc->filters);
610 s->fc->inbuf = s->receiver_node->buf;
611 s->fc->in_loaded = &s->receiver_node->loaded;
612 s->fc->input_eof = &s->receiver_node->eof;
614 s->fc->task.pre_select = filter_pre_select;
615 s->fc->task.event_handler = filter_event_handler;
616 s->fc->task.private_data = s->fc;
617 s->fc->task.flags = 0;
619 sprintf(s->fc->task.status, "filter chain");
620 for (i = 0; i < nf; i++) {
621 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
622 fn->conf = a->filter_conf[i];
624 fn->filter = a->filters[i];
625 INIT_LIST_HEAD(&fn->callbacks);
626 list_add_tail(&fn->node, &s->fc->filters);
627 fn->filter->open(fn);
628 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
629 audio_formats[s->format], i + 1, nf,
630 fn->filter->name, slot_num);
631 s->fc->outbuf = fn->buf;
632 s->fc->out_loaded = &fn->loaded;
634 register_task(&s->fc->task);
637 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
639 struct filter_node *fn;
643 struct slot_info *s = &slot[i];
644 if (s->format < 0 || !s->fc)
646 if (slot_num >= 0 && slot_num != i)
648 if (format >= 0 && s->format != format)
650 if (num_filters(i) < filternum)
654 list_for_each_entry(fn, &s->fc->filters, node)
655 if (filternum <= 0 || j++ == filternum)
662 static void wng_event_handler(struct task *t)
664 PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
668 static void open_writers(int slot_num)
671 struct slot_info *s = &slot[slot_num];
672 struct audio_format_info *a = &afi[s->format];
674 PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
676 s->wng = setup_default_wng();
678 s->wng = wng_new(a->num_writers);
680 s->wng->buf = s->fc->outbuf;
681 s->wng->loaded = s->fc->out_loaded;
682 s->wng->input_eof = &s->fc->eof;
683 s->wng->channels = &s->fc->channels;
684 s->wng->samplerate = &s->fc->samplerate;
685 s->fc->output_eof = &s->wng->eof;
686 PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
688 s->wng->buf = s->receiver_node->buf;
689 s->wng->loaded = &s->receiver_node->loaded;
690 s->wng->input_eof = &s->receiver_node->eof;
692 s->wng->task.event_handler = wng_event_handler;
693 for (i = 0; i < a->num_writers; i++) {
694 s->wng->writer_nodes[i].conf = a->writer_conf[i];
695 s->wng->writer_nodes[i].writer = a->writers[i];
696 sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
698 ret = wng_open(s->wng); /* FIXME */
700 current_decoder = slot_num;
701 activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
704 static void rn_event_handler(struct task *t)
706 // struct receiver_node *rn = t->private_data;
707 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
711 static void open_receiver(int format)
713 struct audio_format_info *a = &afi[format];
716 struct receiver_node *rn;
718 slot_num = get_empty_slot();
720 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
723 s->receiver_node = para_calloc(sizeof(struct receiver_node));
724 rn = s->receiver_node;
725 rn->receiver = a->receiver;
726 rn->conf = a->receiver_conf;
727 ret = a->receiver->open(s->receiver_node);
729 PARA_ERROR_LOG("failed to open receiver (%s)\n",
730 PARA_STRERROR(-ret));
731 free(s->receiver_node);
732 s->receiver_node = NULL;
735 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
736 audio_formats[s->format], a->receiver->name, slot_num);
737 rn->task.private_data = s->receiver_node;
738 rn->task.pre_select = a->receiver->pre_select;
739 rn->task.post_select = a->receiver->post_select;
740 rn->task.event_handler = rn_event_handler;
742 sprintf(rn->task.status, "receiver node");
743 register_task(&rn->task);
746 static int is_frozen(int format)
748 struct audio_format_info *a = &afi[format];
750 return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
753 static void open_current_receiver(void)
759 i = get_audio_format_num(af_status);
762 if (decoder_running(i) || is_frozen(i))
767 static void compute_time_diff(const struct timeval *status_time)
769 struct timeval tmp, diff;
772 const struct timeval max_deviation = {0, 500 * 1000};
773 const int time_smooth = 5;
775 sign = tv_diff(status_time, now, &diff);
776 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
777 // sign, sa_time_diff_sign);
779 sa_time_diff_sign = sign;
785 int s = tv_diff(&diff, &sa_time_diff, &tmp);
786 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
787 PARA_WARNING_LOG("time diff jump: %lims\n",
791 sa_time_diff_sign = tv_convex_combination(
792 sa_time_diff_sign * time_smooth, &sa_time_diff,
793 count > 10? sign : sign * time_smooth, &diff,
796 PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
799 sa_time_diff_sign ? "+" : "-",
804 static void check_stat_line(char *line)
808 long unsigned sec, usec;
811 // PARA_INFO_LOG("line: %s\n", line);
814 itemnum = stat_line_valid(line);
816 PARA_WARNING_LOG("invalid status line: %s\n", line);
819 tmp = make_message("%s\n", line);
820 stat_client_write(tmp, itemnum);
822 free(stat_item_values[itemnum]);
823 stat_item_values[itemnum] = para_strdup(line);
824 ilen = strlen(status_item_list[itemnum]);
827 playing = strstr(line, "playing")? 1 : 0;
831 af_status = para_strdup(line + ilen + 1);
834 offset_seconds = atoi(line + ilen + 1);
837 length_seconds = atoi(line + ilen + 1);
839 case SI_STREAM_START:
840 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
841 server_stream_start.tv_sec = sec;
842 server_stream_start.tv_usec = usec;
845 case SI_CURRENT_TIME:
846 if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
847 struct timeval tv = {sec, usec};
848 compute_time_diff(&tv);
854 static void handle_signal(int sig)
859 pid_t pid = para_reap_child();
862 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
867 PARA_EMERG_LOG("terminating on signal %d\n", sig);
868 clean_exit(EXIT_FAILURE, "caught deadly signal");
873 static void try_to_close_slot(int slot_num)
875 struct slot_info *s = &slot[slot_num];
879 if (s->receiver_node && !s->receiver_node->eof)
881 if (s->fc && !s->fc->eof)
883 if (s->wng && !s->wng->eof)
885 PARA_INFO_LOG("closing slot %d \n", slot_num);
888 close_filters(s->fc);
890 close_receiver(slot_num);
891 clear_slot(slot_num);
894 static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
900 if (audiod_status != AUDIOD_ON)
903 open_current_receiver();
905 struct slot_info *s = &slot[i];
906 struct audio_format_info *a;
908 try_to_close_slot(i);
912 if (!s->receiver_node)
914 if (!a->num_filters) {
915 if (s->receiver_node->loaded && !s->wng)
919 if (s->receiver_node->loaded && !s->fc) {
923 if (s->fc && *s->fc->out_loaded && !s->wng)
928 static void audiod_post_select(struct sched *s, __a_unused struct task *t)
930 /* only save away the current time for other users */
935 static void init_audiod_task(struct task *t)
937 t->pre_select = audiod_pre_select;
938 t->post_select = audiod_post_select;
939 t->event_handler = NULL;
942 sprintf(t->status, "audiod task");
945 static int parse_stream_command(const char *txt, char **cmd)
947 char *p = strchr(txt, ':');
951 return -E_MISSING_COLON;
953 FOR_EACH_AUDIO_FORMAT(i) {
954 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
959 return -E_UNSUPPORTED_AUDIO_FORMAT;
962 static int add_filter(int format, char *cmdline)
964 struct audio_format_info *a = &afi[format];
965 int filter_num, nf = a->num_filters;
967 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
970 a->filters[nf] = &filters[filter_num];
972 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
973 a->filters[nf]->name);
977 static int init_writers(void)
981 struct audio_format_info *a;
983 init_supported_writers();
984 nw = PARA_MAX(1, conf.writer_given);
985 PARA_INFO_LOG("maximal number of writers: %d\n", nw);
986 FOR_EACH_AUDIO_FORMAT(i) {
988 a->writer_conf = para_malloc(nw * sizeof(void *));
989 a->writers = para_malloc(nw * sizeof(struct writer *));
992 for (i = 0; i < conf.writer_given; i++) {
995 ret = parse_stream_command(conf.writer_arg[i], &cmd);
1000 wconf = check_writer_arg(cmd, &writer_num);
1005 a->writers[nw] = &writers[writer_num];
1006 a->writer_conf[nw] = wconf;
1007 PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
1008 nw, writer_names[writer_num]);
1016 static int init_receivers(void)
1018 int i, ret, receiver_num;
1020 struct audio_format_info *a;
1022 for (i = 0; receivers[i].name; i++) {
1023 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1024 receivers[i].init(&receivers[i]);
1026 for (i = 0; i < conf.receiver_given; i++) {
1027 char *arg = conf.receiver_arg[i];
1028 char *recv = strchr(arg, ':');
1029 ret = -E_MISSING_COLON;
1034 ret = get_audio_format_num(arg);
1037 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1038 if (!afi[ret].receiver_conf) {
1039 ret = -E_RECV_SYNTAX;
1042 afi[ret].receiver = &receivers[receiver_num];
1044 /* use the first available receiver with no arguments
1045 * for those audio formats for which no receiver
1048 cmd = para_strdup(receivers[0].name);
1049 FOR_EACH_AUDIO_FORMAT(i) {
1051 if (a->receiver_conf)
1053 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1054 if (!a->receiver_conf)
1055 return -E_RECV_SYNTAX;
1056 a->receiver = &receivers[receiver_num];
1064 static int init_default_filters(void)
1068 FOR_EACH_AUDIO_FORMAT(i) {
1069 struct audio_format_info *a = &afi[i];
1074 continue; /* no default -- nothing to to */
1075 /* add "dec" to audio format name */
1076 tmp = make_message("%sdec", audio_formats[i]);
1077 for (j = 0; filters[j].name; j++)
1078 if (!strcmp(tmp, filters[j].name))
1081 ret = -E_UNSUPPORTED_FILTER;
1082 if (!filters[j].name)
1084 tmp = para_strdup(filters[j].name);
1085 ret = add_filter(i, tmp);
1089 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
1096 static int init_filters(void)
1100 filter_init(filters);
1101 nf = PARA_MAX(1, conf.filter_given);
1102 PARA_INFO_LOG("maximal number of filters: %d\n", nf);
1103 FOR_EACH_AUDIO_FORMAT(i) {
1104 afi[i].filter_conf = para_malloc(nf * sizeof(void *));
1105 afi[i].filters = para_malloc(nf * sizeof(struct filter *));
1107 if (!conf.no_default_filters_given)
1108 return init_default_filters();
1109 for (i = 0; i < conf.filter_given; i++) {
1110 char *arg = conf.filter_arg[i];
1111 char *filter_name = strchr(arg, ':');
1112 ret = -E_MISSING_COLON;
1115 *filter_name = '\0';
1117 ret = get_audio_format_num(arg);
1120 ret = add_filter(ret, filter_name);
1124 ret = init_default_filters(); /* use default values for the rest */
1129 static int init_stream_io(void)
1133 ret = init_writers();
1136 ret = init_receivers();
1139 ret = init_filters();
1145 static int dump_commands(int fd)
1147 char *buf = para_strdup(""), *tmp = NULL;
1151 FOR_EACH_COMMAND(i) {
1152 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1153 cmds[i].description);
1157 ret = client_write(fd, buf);
1163 * command handlers don't close their fd on errors (ret < 0) so that
1164 * its caller can send an error message. Otherwise (ret >= 0) it's up
1165 * to each individual command to close the fd if necessary.
1168 static int com_help(int fd, int argc, char **argv)
1172 const char *dflt = "No such command. Available commands:\n";
1175 ret = dump_commands(fd);
1178 FOR_EACH_COMMAND(i) {
1179 if (strcmp(cmds[i].name, argv[1]))
1182 "NAME\n\t%s -- %s\n"
1183 "SYNOPSIS\n\tpara_audioc %s\n"
1184 "DESCRIPTION\n%s\n",
1186 cmds[i].description,
1190 ret = client_write(fd, buf);
1194 ret = client_write(fd, dflt);
1196 ret = dump_commands(fd);
1203 static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
1207 long unsigned mask = ~0LU;
1211 for (i = 1; i < argc; i++) {
1212 ret = stat_item_valid(argv[i]);
1218 PARA_INFO_LOG("mask: 0x%lx\n", mask);
1219 if (mask & (1 << SI_PLAY_TIME)) {
1220 struct timeval *t = wstime();
1221 char *ts = get_time_string(t);
1223 ret = client_write(fd, ts);
1229 if (mask & (1 << SI_AUDIOD_UPTIME)) {
1230 char *tmp, *us = uptime_str();
1231 tmp = make_message("%s:%s\n",
1232 status_item_list[SI_AUDIOD_UPTIME], us);
1234 ret = client_write(fd, tmp);
1239 if (mask & (1 << SI_AUDIOD_STATUS)) {
1240 char *s = audiod_status_string();
1241 ret = client_write(fd, s);
1246 if (mask & (1 << SI_DECODER_FLAGS)) {
1247 char *df =decoder_flags();
1248 ret = client_write(fd, df);
1254 for (i = 0; i < NUM_STAT_ITEMS; i++) {
1256 if (!((1 << i) & mask))
1258 v = stat_item_values[i];
1259 tmp = make_message("%s%s%s", buf? buf: "",
1260 v? v : "", v? "\n" : "");
1264 ret = client_write(fd, buf);
1267 ret = stat_client_add(fd, mask);
1272 static int com_grab(int fd, char *cmdline)
1274 struct grab_client *gc;
1275 struct filter_node *fn;
1279 gc = grab_client_new(fd, cmdline, &err);
1282 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1284 activate_grab_client(gc, fn);
1287 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
1289 if (err == -E_GC_HELP_GIVEN) {
1290 msg = make_message("%s\n\n", grab_client_args_info_usage);
1291 for (i = 0; grab_client_args_info_help[i]; i++) {
1292 char *tmp = make_message("%s%s\n", msg,
1293 grab_client_args_info_help[i]);
1298 msg = make_message("%s %s\n",
1299 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
1300 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
1301 err = client_write(fd, msg);
1309 static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
1312 clean_exit(EXIT_SUCCESS, "terminating on user request");
1315 static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
1317 audiod_status = AUDIOD_ON;
1322 static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
1324 audiod_status = AUDIOD_OFF;
1329 static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
1331 audiod_status = AUDIOD_STANDBY;
1336 static int com_cycle(int fd, int argc, char **argv)
1338 switch (audiod_status) {
1340 return com_sb(fd, argc, argv);
1343 return com_on(fd, argc, argv);
1345 case AUDIOD_STANDBY:
1346 return com_off(fd, argc, argv);
1353 static int check_perms(uid_t uid)
1357 if (!conf.user_allow_given)
1359 for (i = 0; i < conf.user_allow_given; i++)
1360 if (uid == conf.user_allow_arg[i])
1362 return -E_UCRED_PERM;
1365 static int handle_connect(int accept_fd)
1367 int i, argc, ret, clifd = -1;
1368 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
1369 struct sockaddr_un unix_addr;
1371 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
1375 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
1378 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
1379 ret = check_perms(ret);
1382 ret = -E_INVALID_AUDIOD_CMD;
1383 cmd = para_strdup(buf);
1384 p = strchr(cmd, '\n');
1391 for (i = 0; cmds[i].name; i++) {
1393 if (strcmp(cmds[i].name, cmd))
1395 if (cmds[i].handler) {
1396 argc = split_args(buf, &argv, "\n");
1397 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
1398 ret = cmds[i].handler(clifd, argc, argv);
1401 for (j = 0; p[j]; j++)
1404 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
1405 ret = cmds[i].line_handler(clifd, p);
1408 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1413 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1414 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1415 client_write(clifd, tmp);
1422 static int audiod_get_socket(void)
1424 struct sockaddr_un unix_addr;
1427 if (conf.socket_given)
1428 socket_name = para_strdup(conf.socket_arg);
1430 char *hn = para_hostname();
1431 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1435 PARA_NOTICE_LOG("local socket: %s\n", socket_name);
1436 if (conf.force_given)
1437 unlink(socket_name);
1438 fd = create_pf_socket(socket_name, &unix_addr,
1439 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1441 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1442 exit(EXIT_FAILURE); /* do not unlink socket */
1444 if (listen(fd , 5) < 0) {
1445 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1446 exit(EXIT_FAILURE); /* do not unlink socket */
1448 add_close_on_fork_list(fd);
1452 static int open_stat_pipe(void)
1454 int ret, fd[3] = {-1, 1, 0};
1456 ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
1459 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1460 add_close_on_fork_list(ret);
1462 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1466 void signal_event_handler(struct task *t)
1468 struct signal_task *st = t->private_data;
1469 handle_signal(st->signum);
1472 void signal_pre_select(struct sched *s, struct task *t)
1474 struct signal_task *st = t->private_data;
1476 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1479 void signal_post_select(struct sched *s, struct task *t)
1481 struct signal_task *st = t->private_data;
1483 if (!FD_ISSET(st->fd, &s->rfds))
1485 t->ret = -E_SIGNAL_CAUGHT;
1486 st->signum = para_next_signal();
1489 void signal_setup_default(struct signal_task *st)
1491 st->task.pre_select = signal_pre_select;
1492 st->task.post_select = signal_post_select;
1493 st->task.private_data = st;
1495 sprintf(st->task.status, "signal task");
1498 static void command_pre_select(struct sched *s, struct task *t)
1500 struct command_task *ct = t->private_data;
1502 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
1506 static void command_post_select(struct sched *s, struct task *t)
1509 struct command_task *ct = t->private_data;
1511 t->ret = 1; /* always successful */
1512 if (audiod_status != AUDIOD_OFF)
1513 audiod_status_dump();
1514 if (!FD_ISSET(ct->fd, &s->rfds))
1516 ret = handle_connect(ct->fd);
1518 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1521 static void init_command_task(struct command_task *ct)
1523 ct->task.pre_select = command_pre_select;
1524 ct->task.post_select = command_post_select;
1525 ct->task.event_handler = NULL;
1526 ct->task.private_data = ct;
1528 ct->fd = audiod_get_socket(); /* doesn't return on errors */
1529 sprintf(ct->task.status, "command task");
1532 static void status_pre_select(struct sched *s, struct task *t)
1534 struct status_task *st = t->private_data;
1536 if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
1538 if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
1539 st->fd = open_stat_pipe();
1543 if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
1544 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
1547 static void status_post_select(struct sched *s, struct task *t)
1549 struct status_task *st = t->private_data;
1553 if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
1555 ret = read(st->fd, st->buf + st->loaded,
1556 STRINGSIZE - 1 - st->loaded);
1559 /* avoid busy loop if server is down */
1560 while (sleep(1) > 0) /* FIXME */
1563 st->buf[ret + st->loaded] = '\0';
1564 st->loaded = for_each_line(st->buf, ret + st->loaded,
1569 static void init_status_task(struct status_task *st)
1571 st->task.pre_select = status_pre_select;
1572 st->task.post_select = status_post_select;
1573 st->task.private_data = st;
1578 sprintf(st->task.status, "status task");
1581 static void set_initial_status(void)
1583 audiod_status = AUDIOD_ON;
1584 if (!conf.mode_given)
1586 if (!strcmp(conf.mode_arg, "sb")) {
1587 audiod_status = AUDIOD_STANDBY;
1590 if (!strcmp(conf.mode_arg, "off")) {
1591 audiod_status = AUDIOD_OFF;
1594 if (strcmp(conf.mode_arg, "on"))
1595 PARA_WARNING_LOG("%s", "invalid mode\n");
1598 int main(int argc, char *argv[])
1603 struct command_task command_task_struct, *cmd_task = &command_task_struct;
1604 struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
1609 hostname = para_hostname();
1610 cmdline_parser(argc, argv, &conf);
1611 para_drop_privileges(conf.user_arg, conf.group_arg);
1612 cf = configfile_exists();
1614 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1615 PARA_EMERG_LOG("%s", "parse error in config file\n");
1619 if (conf.logfile_given)
1620 logfile = open_log(conf.logfile_arg);
1621 log_welcome("para_audiod", conf.loglevel_arg);
1622 i = init_stream_io();
1624 PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
1627 server_uptime(UPTIME_SET);
1628 set_initial_status();
1632 setup_signal_handling();
1633 signal_setup_default(sig_task);
1634 sig_task->task.event_handler = signal_event_handler;
1636 init_status_task(stat_task);
1637 init_command_task(cmd_task);
1638 init_audiod_task(audiod_task);
1640 if (conf.daemon_given)
1643 register_task(&sig_task->task);
1644 register_task(&cmd_task->task);
1645 register_task(&stat_task->task);
1646 register_task(audiod_task);
1647 s.default_timeout.tv_sec = 0;
1648 s.default_timeout.tv_usec = 99 * 1000;
1651 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
1652 return EXIT_FAILURE;