/** \file audiod.c the paraslash's audio daemon */
-#include <sys/time.h> /* gettimeofday */
#include "para.h"
#include "audiod.cmdline.h"
struct slot_info {
/** number of the audio format in this slot */
int format;
- /** time of the last successful read from the receiver */
- struct timeval rtime;
- /** time the last write to the write fd happend */
- struct timeval wtime;
/** writer start time */
struct timeval wstime;
/** the receiver info associated with this slot */
static char *stat_item_values[NUM_STAT_ITEMS];
static FILE *logfile;
static const struct timeval restart_delay = {0, 300 * 1000};
-
static struct audio_format_info afi[NUM_AUDIO_FORMATS];
+static struct timeval *now;
static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
+/**
+ * the task for handling audiod commands
+ *
+ * \sa struct task, struct sched
+ */
struct command_task {
+ /** the local listening socket */
int fd;
+ /** the associated task structure */
struct task task;
};
-static struct command_task command_task_struct, *cmd_task = &command_task_struct;
+/**
+ * the task for audiod's child (para_client stat)
+ *
+ * \sa struct task, struct sched
+ */
struct status_task {
+ /** the output of the stat command is read from this fd */
int fd;
- struct task task;
+ /** stat data is stored here */
char buf[STRINGSIZE];
+ /** number of bytes loaded in \a buf */
unsigned loaded;
-};
-static struct status_task status_task_struct, *stat_task = &status_task_struct;
-
-struct audiod_task {
+ /** the associated task structure */
struct task task;
};
-static struct audiod_task audiod_task_struct, *at = &audiod_task_struct;
+static struct status_task status_task_struct, *stat_task = &status_task_struct;
struct signal_task {
int fd;
struct task task;
};
-
/** defines one command of para_audiod */
struct audiod_command {
/** the name of the command */
const char *name;
/** pointer to the function that handles the command */
int (*handler)(int, int, char**);
+ /**
+ * if the command prefers to handle the full line (rather than the usual
+ * argv[] array), it stores a pointer to the corresponding line handling
+ * function here. In this case, the above \a handler pointer must be NULL.
+ */
int (*line_handler)(int, char*);
/** one-line description of the command */
const char *description;
static char *get_time_string(struct timeval *newest_stime)
{
- struct timeval now, diff, adj_stream_start, tmp;
+ struct timeval diff, adj_stream_start, tmp;
int total = 0, use_server_time = 1;
if (!playing) {
use_server_time = 0;
}
}
- gettimeofday(&now, NULL);
- tv_diff(&now, &tmp, &diff);
+ tv_diff(now, &tmp, &diff);
total = diff.tv_sec + offset_seconds;
if (total > length_seconds)
total = length_seconds;
s->format = -1;
}
-static void set_restart_barrier(int format, struct timeval *now)
-{
- struct timeval tmp;
-
- if (now)
- tmp = *now;
- else
- gettimeofday(&tmp, NULL);
- tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
-}
-
static void close_receiver(int slot_num)
{
struct slot_info *s = &slot[slot_num];
if (s->format < 0 || !s->receiver_node)
return;
a = &afi[s->format];
- PARA_NOTICE_LOG("closing %s recevier in slot %d (eof = %d)\n",
+ PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
audio_formats[s->format] , slot_num, s->receiver_node->eof);
if (!s->receiver_node->eof)
unregister_task(&s->receiver_node->task);
a->receiver->close(s->receiver_node);
free(s->receiver_node);
s->receiver_node = NULL;
- set_restart_barrier(s->format, NULL);
+ /* set restart barrier */
+ tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
}
static void kill_all_decoders(void)
}
}
-static void check_sigchld(void)
-{
- pid_t pid;
- struct timeval now;
- gettimeofday(&now, NULL);
-
-reap_next_child:
- pid = para_reap_child();
- if (pid <= 0)
- return;
- PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
- goto reap_next_child;
-}
-
static int get_empty_slot(void)
{
int i;
clear_slot(i);
return i;
}
- if (s->wng)
- continue;
- if (s->receiver_node)
- continue;
- if (s->fc)
+ if (s->wng || s->receiver_node || s->fc)
continue;
clear_slot(i);
return i;
offset_seconds = 0;
audiod_status_dump();
playing = 0;
- stat_item_values[SI_STATUS_BAR] = make_message("%s:no connection to para_server\n",
+ stat_item_values[SI_STATUS_BAR] = make_message(
+ "%s:no connection to para_server\n",
status_item_list[SI_STATUS_BAR]);
stat_client_write(stat_item_values[SI_STATUS_BAR], SI_STATUS_BAR);
}
static void __noreturn clean_exit(int status, const char *msg)
{
PARA_EMERG_LOG("%s\n", msg);
- kill_all_decoders();
if (socket_name)
unlink(socket_name);
if (stat_task->fd >= 0)
exit(status);
}
-/** get the number of filters for the given audio format */
+/**
+ * get the number of filters
+ *
+ * \param audio_format_num the number identifying the audio format
+ *
+ * \return the number of filters for the given audio format
+ *
+ * \sa struct filter;
+ */
int num_filters(int audio_format_num)
{
return afi[audio_format_num].num_filters;
}
-void filter_event_handler(struct task *t)
+static void filter_event_handler(struct task *t)
{
PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
unregister_task(t);
s->fc->out_loaded = &fn->loaded;
}
register_task(&s->fc->task);
-// PARA_DEBUG_LOG("output loaded for filter chain %p: %p\n", s->fc,
-// s->fc->out_loaded);
}
static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
static void wng_event_handler(struct task *t)
{
- struct writer_node_group *g = t->private_data;
- int i;
-
PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
unregister_task(t);
- FOR_EACH_SLOT(i) {
- if (slot[i].wng != g)
- continue;
- wng_close(g);
- wng_destroy(g);
- slot[i].wng = NULL;
- }
}
-static void open_writer(int slot_num, struct timeval *now)
+static void open_writers(int slot_num)
{
int ret, i;
struct slot_info *s = &slot[slot_num];
for (i = 0; i < a->num_writers; i++) {
s->wng->writer_nodes[i].conf = a->writer_conf[i];
s->wng->writer_nodes[i].writer = a->writers[i];
- sprintf(s->wng->writer_nodes[i].task.status, "writer_ node");
+ sprintf(s->wng->writer_nodes[i].task.status, "writer_node");
}
ret = wng_open(s->wng);
s->wstime = *now;
activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
}
-void rn_event_handler(struct task *t)
+static void rn_event_handler(struct task *t)
{
// struct receiver_node *rn = t->private_data;
PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
unregister_task(t);
}
+
static void open_receiver(int format)
{
struct audio_format_info *a = &afi[format];
clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
s = &slot[slot_num];
s->format = format;
- gettimeofday(&s->rtime, NULL);
- s->wtime = s->rtime;
s->receiver_node = para_calloc(sizeof(struct receiver_node));
rn = s->receiver_node;
rn->receiver = a->receiver;
PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
audio_formats[s->format], a->receiver->name, slot_num);
rn->task.private_data = s->receiver_node;
- PARA_NOTICE_LOG("rn = %p\n", rn->task.private_data);
rn->task.pre_select = a->receiver->pre_select;
rn->task.post_select = a->receiver->post_select;
rn->task.event_handler = rn_event_handler;
register_task(&rn->task);
}
-static int is_frozen(int format, struct timeval *now)
+static int is_frozen(int format)
{
struct audio_format_info *a = &afi[format];
return (tv_diff(now, &a->restart_barrier, NULL) > 0)? 0 : 1;
}
-static void open_current_receiver(struct timeval *now)
+static void open_current_receiver(void)
{
int i;
i = get_audio_format_num(af_status);
if (i < 0)
return;
- if ((decoder_running(i) & 1) || is_frozen(i, now))
+ if (decoder_running(i) || is_frozen(i))
return;
open_receiver(i);
}
static void compute_time_diff(const struct timeval *status_time)
{
- struct timeval now, tmp, diff;
+ struct timeval tmp, diff;
static int count;
int sign;
const struct timeval max_deviation = {0, 500 * 1000};
const int time_smooth = 5;
- gettimeofday(&now, NULL);
- sign = tv_diff(status_time, &now, &diff);
+ sign = tv_diff(status_time, now, &diff);
// PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
// sign, sa_time_diff_sign);
if (!count) {
{
switch (sig) {
case SIGCHLD:
- return check_sigchld();
+ for (;;) {
+ pid_t pid = para_reap_child();
+ if (pid <= 0)
+ return;
+ PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
+ }
case SIGINT:
case SIGTERM:
case SIGHUP:
}
}
-static void check_timeouts(void)
-{
- struct timeval now;
- int slot_num, timeout = conf.stream_timeout_arg;
-
- gettimeofday(&now, NULL);
- FOR_EACH_SLOT(slot_num) {
- struct slot_info *s = &slot[slot_num];
- if (s->format < 0)
- continue;
- /* check read time */
- if (s->receiver_node &&
- now.tv_sec > s->rtime.tv_sec + timeout) {
- PARA_INFO_LOG("%s stream (slot %d) not ready\n",
- audio_formats[s->format], slot_num);
- s->receiver_node->eof = 1;
- }
- }
-}
-
-static void close_decoder_if_idle(int slot_num)
+static void try_to_close_slot(int slot_num)
{
struct slot_info *s = &slot[slot_num];
if (s->format < 0)
return;
- if (!s->fc)
+ if (s->receiver_node && !s->receiver_node->eof)
return;
- if (s->wng)
+ if (s->fc && !s->fc->eof)
return;
- PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
- slot_num, s->fc);
+ if (s->wng && !s->wng->eof)
+ return;
+ PARA_INFO_LOG("closing slot %d \n", slot_num);
+ wng_close(s->wng);
+ wng_destroy(s->wng);
close_filters(s->fc);
free(s->fc);
close_receiver(slot_num);
{
int i;
+ now = &s->now;
if (audiod_status != AUDIOD_ON)
kill_all_decoders();
else if (playing)
- open_current_receiver(&s->now);
- check_timeouts();
+ open_current_receiver();
FOR_EACH_SLOT(i) {
struct receiver_node *rn;
- close_decoder_if_idle(i);
+ try_to_close_slot(i);
if (slot[i].format < 0)
continue;
rn = slot[i].receiver_node;
if (rn && rn->loaded && !slot[i].wng) {
open_filters(i);
- open_writer(i, &s->now);
+ open_writers(i);
}
}
}
static void audiod_post_select(struct sched *s, __a_unused struct task *t)
{
- int i;
-
- FOR_EACH_SLOT(i) {
- struct receiver_node *rn = slot[i].receiver_node;
-
- if (rn && rn->loaded)
- slot[i].rtime = s->now;
- }
+ /* only save away the current time for other users */
+ now = &s->now;
}
-static void init_audiod_task(struct audiod_task *at)
+static void init_audiod_task(struct task *t)
{
- at->task.pre_select = audiod_pre_select;
- at->task.post_select = audiod_post_select;
- at->task.private_data = at;
- at->task.flags = 0;
- sprintf(at->task.status, "audiod task");
+ t->pre_select = audiod_pre_select;
+ t->post_select = audiod_post_select;
+ t->event_handler = NULL;
+ t->private_data = t;
+ t->flags = 0;
+ sprintf(t->status, "audiod task");
}
static int parse_stream_command(const char *txt, char **cmd)
return filter_num;
}
-static int setup_default_filters(void)
-{
- int i, ret = 1;
-
- FOR_EACH_AUDIO_FORMAT(i) {
- struct audio_format_info *a = &afi[i];
- char *tmp;
- int j;
- if (a->num_filters)
- continue;
- /* add "dec" to audio format name */
- tmp = make_message("%sdec", audio_formats[i]);
- for (j = 0; filters[j].name; j++)
- if (!strcmp(tmp, filters[j].name))
- break;
- free(tmp);
- ret = -E_UNSUPPORTED_FILTER;
- if (!filters[j].name)
- goto out;
- tmp = para_strdup(filters[j].name);
- ret = add_filter(i, tmp);
- free(tmp);
- if (ret < 0)
- goto out;
- PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
- filters[j].name);
- ret = add_filter(i, "wav");
- if (ret < 0)
- goto out;
- PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
- }
-out:
- return ret;
-}
-
static int init_writers(void)
{
int i, ret, nw;
init_supported_writers();
nw = PARA_MAX(1, conf.writer_given);
- PARA_INFO_LOG("allocating space for %d writers\n", nw);
+ PARA_INFO_LOG("maximal number of writers: %d\n", nw);
FOR_EACH_AUDIO_FORMAT(i) {
a = &afi[i];
a->writer_conf = para_malloc(nw * sizeof(void *));
ret = writer_num;
goto out;
}
- a->writers[nw] = &writers[ret];
+ a->writers[nw] = &writers[writer_num];
a->writer_conf[nw] = wconf;
PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
nw, writer_names[writer_num]);
free(cmd);
return ret;
}
+
+static int init_default_filters(void)
+{
+ int i, ret = 1;
+
+ FOR_EACH_AUDIO_FORMAT(i) {
+ struct audio_format_info *a = &afi[i];
+ char *tmp;
+ int j;
+
+ if (a->num_filters)
+ continue; /* no default -- nothing to to */
+ /* add "dec" to audio format name */
+ tmp = make_message("%sdec", audio_formats[i]);
+ for (j = 0; filters[j].name; j++)
+ if (!strcmp(tmp, filters[j].name))
+ break;
+ free(tmp);
+ ret = -E_UNSUPPORTED_FILTER;
+ if (!filters[j].name)
+ goto out;
+ tmp = para_strdup(filters[j].name);
+ ret = add_filter(i, tmp);
+ free(tmp);
+ if (ret < 0)
+ goto out;
+ PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
+ filters[j].name);
+ }
+out:
+ return ret;
+}
+
static int init_filters(void)
{
int i, ret, nf;
filter_init(filters);
- nf = PARA_MAX(2, conf.filter_given) + 1;
- PARA_INFO_LOG("allocating space for %d filters\n", nf);
+ nf = PARA_MAX(1, conf.filter_given);
+ PARA_INFO_LOG("maximal number of filters: %d\n", nf);
FOR_EACH_AUDIO_FORMAT(i) {
afi[i].filter_conf = para_malloc(nf * sizeof(void *));
afi[i].filters = para_malloc(nf * sizeof(struct filter *));
}
if (!conf.no_default_filters_given)
- return setup_default_filters();
+ return init_default_filters();
for (i = 0; i < conf.filter_given; i++) {
char *arg = conf.filter_arg[i];
char *filter_name = strchr(arg, ':');
if (ret < 0)
goto out;
}
- ret = 1;
+ ret = init_default_filters(); /* use default values for the rest */
out:
return ret;
}
return -E_UCRED_PERM;
}
-static int handle_connect(void)
+static int handle_connect(int accept_fd)
{
int i, argc, ret, clifd = -1;
char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
struct sockaddr_un unix_addr;
- ret = para_accept(cmd_task->fd, &unix_addr, sizeof(struct sockaddr_un));
+ ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
if (ret < 0)
goto out;
clifd = ret;
return ret;
}
-static void audiod_get_socket(void)
+static int audiod_get_socket(void)
{
struct sockaddr_un unix_addr;
+ int fd;
if (conf.socket_given)
socket_name = para_strdup(conf.socket_arg);
hn);
free(hn);
}
- PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
+ PARA_NOTICE_LOG("local socket: %s\n", socket_name);
if (conf.force_given)
unlink(socket_name);
- cmd_task->fd = create_pf_socket(socket_name, &unix_addr,
+ fd = create_pf_socket(socket_name, &unix_addr,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
- if (cmd_task->fd < 0) {
+ if (fd < 0) {
PARA_EMERG_LOG("%s", "can not connect to socket\n");
exit(EXIT_FAILURE); /* do not unlink socket */
}
- if (listen(cmd_task->fd , 5) < 0) {
+ if (listen(fd , 5) < 0) {
PARA_EMERG_LOG("%s", "can not listen on socket\n");
exit(EXIT_FAILURE); /* do not unlink socket */
}
- add_close_on_fork_list(cmd_task->fd);
+ add_close_on_fork_list(fd);
+ return fd;
}
static int open_stat_pipe(void)
t->ret = 1; /* always successful */
if (!FD_ISSET(ct->fd, &s->rfds))
return;
- ret = handle_connect();
+ ret = handle_connect(ct->fd);
if (ret < 0)
PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
}
-void init_command_task(struct command_task *ct)
+static void init_command_task(struct command_task *ct)
{
ct->task.pre_select = command_pre_select;
ct->task.post_select = command_post_select;
+ ct->task.event_handler = NULL;
ct->task.private_data = ct;
ct->task.flags = 0;
+ ct->fd = audiod_get_socket(); /* doesn't return on errors */
sprintf(ct->task.status, "command task");
}
if (ret <= 0) {
close_stat_pipe();
/* avoid busy loop if server is down */
- while (sleep(1) > 0)
+ while (sleep(1) > 0) /* FIXME */
; /* try again*/
} else {
st->buf[ret + st->loaded] = '\0';
char *cf;
int ret, i;
struct sched s;
+ struct command_task command_task_struct, *cmd_task = &command_task_struct;
+ struct task audiod_task_struct, *audiod_task = &audiod_task_struct;
init_sched();
clear_slot(i);
init_grabbing();
setup_signal_handling();
- if (conf.daemon_given)
- daemon_init();
- audiod_get_socket(); /* doesn't return on errors */
-
signal_setup_default(sig_task);
sig_task->task.event_handler = signal_event_handler;
init_status_task(stat_task);
init_command_task(cmd_task);
- init_audiod_task(at);
+ init_audiod_task(audiod_task);
+
+ if (conf.daemon_given)
+ daemon_init();
register_task(&sig_task->task);
register_task(&cmd_task->task);
register_task(&stat_task->task);
- register_task(&at->task);
+ register_task(audiod_task);
s.default_timeout.tv_sec = 0;
s.default_timeout.tv_usec = 99 * 1000;
ret = sched(&s);
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