/*
- * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
+ * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
/** \file audiod.c the paraslash's audio daemon */
-#include <sys/time.h> /* gettimeofday */
#include "para.h"
#include "audiod.cmdline.h"
#include "list.h"
-#include "close_on_fork.h"
+#include "sched.h"
#include "recv.h"
#include "filter.h"
#include "grab_client.cmdline.h"
#include "grab_client.h"
-
-#include "error.h"
+#include "client.cmdline.h"
+#include "client.h"
#include "audiod.h"
#include "net.h"
#include "daemon.h"
#include "string.h"
#include "fd.h"
+#include "write.h"
+#include "write_common.h"
+#include "error.h"
+#include "signal.h"
/** define the array of error lists needed by para_audiod */
INIT_AUDIOD_ERRLISTS;
/** define the array containing all supported audio formats */
-DEFINE_AUDIO_FORMAT_ARRAY;
-
-/**
- * the possible modes of operation
- *
- * - off: disconnect from para_server
- * - on: receive status information from para_server and play the audio stream
- * - sb: only receive status information but not the audio stream
-*/
-enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
+const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
/** defines how to handle one supported audio format */
struct audio_format_info {
-/** pointer to the receiver for this audio format */
+ /** pointer to the receiver for this audio format */
struct receiver *receiver;
-/** the receiver configuration */
+ /** the receiver configuration */
void *receiver_conf;
-/** the number of filters that should be activated for this audio format */
+ /** the number of filters that should be activated for this audio format */
unsigned int num_filters;
-/** pointer to the array of filters to be activated */
+ /** pointer to the array of filters to be activated */
struct filter **filters;
-/** pointer to the array of filter configurations */
+ /** pointer to the array of filter configurations */
void **filter_conf;
-/** output of the last filter is written to stdin of this command */
- char *write_cmd;
-/** do not start receiver/filters/writer before this time */
+ /** the number of filters that should be activated for this audio format */
+ unsigned int num_writers;
+ /** pointer to the array of writers to be activated */
+ struct writer **writers;
+ /** pointer to the array of writer configurations */
+ void **writer_conf;
+ /** do not start receiver/filters/writer before this time */
struct timeval restart_barrier;
};
/**
- * describes one instance of a receiver-filter-writer chain
+ * para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
+ * be associated with a receiver/filter/writer triple. This array holds all
+ * information on the status of these slots.
*
- * \sa receier_node, receiver, filter, filter_node, filter_chain_info
- */
-struct slot_info {
-/** number of the audio format in this slot */
- int format;
-/** the file descriptor of the writer */
- int write_fd;
-/** the process id of the writer */
- pid_t wpid;
-/** 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;
-/** did we include \a write_fd in the fdset */
- int wcheck;
-/** set to one if we have sent the TERM signal to \a wpid */
- int wkilled;
-/** the receiver info associated with this slot */
- struct receiver_node *receiver_node;
-/** the active filter chain */
- struct filter_chain_info *fci;
-};
-
-static struct slot_info slot[MAX_STREAM_SLOTS];
-
-/** 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**);
-/** one-line description of the command */
-const char *description;
-/** summary of the command line options */
-const char *synopsis;
-/** the long help text */
-const char *help;
-};
-
-extern const char *status_item_list[NUM_STAT_ITEMS];
-
-static int com_grab(int, int, char **);
-static int com_cycle(int, int, char **);
-static int com_help(int, int, char **);
-static int com_off(int, int, char **);
-static int com_on(int, int, char **);
-static int com_sb(int, int, char **);
-static int com_stat(int, int, char **);
-static int com_term(int, int, char **);
-static int stat_pipe = -1, signal_pipe;
-
-static struct gengetopt_args_info conf;
-static struct timeval server_stream_start, sa_time_diff;
-static int playing, current_decoder = -1,
- audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
- sa_time_diff_sign = 1, audiod_socket = -1;
-static char *af_status, /* the audio format announced in server status */
- *socket_name, *hostname;
-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 audiod_command cmds[] = {
-{
-.name = "cycle",
-.handler = com_cycle,
-.description = "switch to next mode",
-.synopsis = "cycle",
-.help =
+ * \sa struct slot_info
+ * */
+struct slot_info slot[MAX_STREAM_SLOTS];
-"on -> standby -> off -> on\n"
-},
-{
-.name = "grab",
-.handler = com_grab,
-.description = "grab the audio stream",
-.synopsis = "-- grab [grab_options]",
-.help =
-
-"grab ('splice') the audio stream at any position in the filter \n"
-"chain and send that data back to the client. Try\n"
-"\t para_audioc -- grab -h\n"
-"for the list of available options.\n"
-},
-
-{
-.name = "help",
-.handler = com_help,
-.description = "display command list or help for given command",
-.synopsis = "help [command]",
-.help =
-
-"When I was younger, so much younger than today, I never needed\n"
-"anybody's help in any way. But now these days are gone, I'm not so\n"
-"self assured. Now I find I've changed my mind and opened up the doors.\n"
-"\n"
-" -- Beatles: Help\n"
-
-},
-{
-.name = "off",
-.handler = com_off,
-.description = "deactivate para_audiod",
-.synopsis = "off",
-.help =
-
-"Close connection to para_server and stop all decoders.\n"
-
-},
-{
-.name = "on",
-.handler = com_on,
-.description = "activate para_audiod",
-.synopsis = "on",
-.help =
-
-"Establish connection to para_server, retrieve para_server's current\n"
-"status. If playing, start corresponding decoder. Otherwise stop\n"
-"all decoders.\n"
+/**
+ * the current mode of operation of which can be changed by the on/off/cycle
+ * commands. It is either, AUDIOD_OFF, AUDIOD_ON or AUDIOD_STANDBY.
+ */
+int audiod_status = AUDIOD_ON;
-},
-{
-.name = "sb",
-.handler = com_sb,
-.description = "enter standby mode",
-.synopsis = "sb",
-.help =
+/**
+ * the gengetopt args_info struct that holds information on all command line
+ * arguments
+ */
+struct audiod_args_info conf;
-"Stop all decoders but leave connection to para_server open.\n"
+static char *socket_name;
+static FILE *logfile;
+static struct audio_format_info afi[NUM_AUDIO_FORMATS];
-},
-{
-.name = "stat",
-.handler = com_stat,
-.description = "print status information",
-.synopsis = "stat [item1 ...]",
-.help =
+static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
-"Dump given status items (all if none given) to stdout.\n"
+static struct status_task status_task_struct;
-},
-{
-.name = "term",
-.handler = com_term,
-.description = "terminate audiod",
-.synopsis = "term",
-.help =
+/**
+ * the task that calls the status command of para_server
+ *
+ * \sa struct status_task
+ */
+struct status_task *stat_task = &status_task_struct;
+static struct timeval initial_delay_barrier;
-"Stop all decoders, shut down connection to para_server and exit.\n"
+/**
+ * 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;
+};
-},
-{
-.name = NULL,
-}
+/**
+ * task for signal handling
+ */
+struct signal_task {
+ /** the signal pipe */
+ int fd;
+ /** the number of the most recent signal */
+ int signum;
+ /** the associated task structure */
+ struct task task;
};
-/** iterate over all slots */
-#define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
/** iterate over all supported audio formats */
#define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
-/** iterate over the array of all audiod commands */
-#define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
/**
* get the audio format number
return -E_UNSUPPORTED_AUDIO_FORMAT;
}
-/*
- * log function. first argument is loglevel.
+/**
+ * the log function of para_audiod
+ *
+ * \param ll loglevel
+ * \param fmt the format string
*/
void para_log(int ll, const char* fmt,...)
{
struct tm *tm;
time_t t1;
char str[MAXLINE] = "";
+ static char *hostname;
if (ll < conf.loglevel_arg)
return;
+ if (!hostname)
+ hostname = para_hostname();
outfd = logfile? logfile : stderr;
time(&t1);
tm = localtime(&t1);
va_end(argp);
}
-static int client_write(int fd, const char *buf)
-{
- size_t len = strlen(buf);
- return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
-}
-
-static char *get_time_string(struct timeval *newest_stime)
-{
- struct timeval now, diff, adj_stream_start, tmp;
- int total = 0, use_server_time = 1;
-
- if (!playing) {
- if (length_seconds)
- return NULL;
- return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
- }
- if (audiod_status == AUDIOD_OFF)
- goto out;
- if (sa_time_diff_sign > 0)
- tv_diff(&server_stream_start, &sa_time_diff,
- &adj_stream_start);
- else
- tv_add(&server_stream_start, &sa_time_diff,
- &adj_stream_start);
- tmp = adj_stream_start;
- if (newest_stime && audiod_status == AUDIOD_ON) {
- tv_diff(newest_stime, &adj_stream_start, &diff);
- if (tv2ms(&diff) < 5000) {
- tmp = *newest_stime;
- use_server_time = 0;
- }
- }
- gettimeofday(&now, NULL);
- tv_diff(&now, &tmp, &diff);
- total = diff.tv_sec + offset_seconds;
- if (total > length_seconds)
- total = length_seconds;
- if (total < 0)
- total = 0;
-out:
- return make_message(
- "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
- status_item_list[SI_PLAY_TIME],
- use_server_time? "~" : "",
- total / 60,
- total % 60,
- (length_seconds - total) / 60,
- (length_seconds - total) % 60,
- length_seconds? (total * 100 + length_seconds / 2) /
- length_seconds : 0,
- length_seconds / 60,
- length_seconds % 60
- );
-}
-
-__malloc static char *audiod_status_string(void)
-{
- const char *status = (audiod_status == AUDIOD_ON)?
- "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
- return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
-}
-
-static struct timeval *wstime(void)
-{
- int i;
- struct timeval *max = NULL;
- FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
- if (s->wpid <= 0)
- continue;
- if (max && tv_diff(&s->wstime, max, NULL) <= 0)
- continue;
- max = &s->wstime;
- }
- return max;
-}
-__malloc static char *decoder_flags(void)
-{
- int i;
- char decoder_flags[MAX_STREAM_SLOTS + 1];
-
- FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
- char flag = '0';
- if (s->receiver_node)
- flag += 1;
- if (s->wpid > 0)
- flag += 2;
- if (flag != '0')
- flag += s->format * 4;
- decoder_flags[i] = flag;
- }
- decoder_flags[MAX_STREAM_SLOTS] = '\0';
- return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
- decoder_flags);
-}
-
static char *configfile_exists(void)
{
static char *config_file;
static void setup_signal_handling(void)
{
- signal_pipe = para_signal_init();
- PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
+ sig_task->fd = para_signal_init();
+ PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
para_install_sighandler(SIGINT);
para_install_sighandler(SIGTERM);
- para_install_sighandler(SIGCHLD);
para_install_sighandler(SIGHUP);
signal(SIGPIPE, SIG_IGN);
}
-static void audiod_status_dump(void)
-{
- static char *p_ts, *p_us, *p_as, *p_df;
- struct timeval *t = wstime();
- char *us, *tmp = get_time_string(t);
-
- if (tmp && (!p_ts || strcmp(tmp, p_ts)))
- stat_client_write(tmp, SI_PLAY_TIME);
- free(p_ts);
- p_ts = tmp;
-
- us = uptime_str();
- tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
- free(us);
- if (!p_us || strcmp(p_us, tmp))
- stat_client_write(tmp, SI_AUDIOD_UPTIME);
- free(p_us);
- p_us = tmp;
-
- tmp = audiod_status_string();
- if (!p_as || strcmp(p_as, tmp))
- stat_client_write(tmp, SI_AUDIOD_STATUS);
- free(p_as);
- p_as = tmp;
-
- tmp = decoder_flags();
- if (!p_df || strcmp(p_df, tmp))
- stat_client_write(tmp, SI_DECODER_FLAGS);
- free(p_df);
- p_df = tmp;
-}
-
static void clear_slot(int slot_num)
{
struct slot_info *s = &slot[slot_num];
s->format = -1;
}
-static void kill_stream_writer(int slot_num)
-{
- struct slot_info *s = &slot[slot_num];
-
- if (s->format < 0 || s->wkilled || s->wpid <= 0)
- return;
- PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
- s->wpid, audio_formats[s->format], slot_num);
- kill(s->wpid, SIGTERM);
- s->wkilled = 1;
- s->fci->error = 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\n",
- audio_formats[s->format] , slot_num);
+ PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
+ audio_formats[s->format] , slot_num, s->receiver_node->eof);
a->receiver->close(s->receiver_node);
free(s->receiver_node);
s->receiver_node = NULL;
- set_restart_barrier(s->format, NULL);
}
static void kill_all_decoders(void)
{
int i;
- FOR_EACH_SLOT(i)
- if (slot[i].format >= 0) {
- PARA_INFO_LOG("stopping decoder in slot %d\n", i);
- kill_stream_writer(i);
- }
-}
-
-static void check_sigchld(void)
-{
- pid_t pid;
- int i;
- struct timeval now;
- gettimeofday(&now, NULL);
-
-reap_next_child:
- pid = para_reap_child();
- if (pid <= 0)
- return;
FOR_EACH_SLOT(i) {
struct slot_info *s = &slot[i];
- long lifetime;
- if (s->format < 0)
- continue;
- if (pid == s->wpid) {
- s->wpid = -1;
- lifetime = now.tv_sec - s->wstime.tv_sec;
- PARA_INFO_LOG("%s stream writer in slot %d died "
- "after %li secs\n",
- audio_formats[s->format], i, lifetime);
- set_restart_barrier(s->format, &now);
- goto reap_next_child;
+ if (s->wng && !s->wng->eof) {
+ PARA_INFO_LOG("unregistering writer node group in slot %d\n",
+ i);
+ wng_unregister(s->wng);
+ s->wng->eof = 1;
+ }
+ if (s->fc && !s->fc->eof) {
+ PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
+ unregister_task(&s->fc->task);
+ s->fc->eof = 1;
+ }
+ if (s->receiver_node && !s->receiver_node->eof) {
+ PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
+ unregister_task(&s->receiver_node->task);
+ s->receiver_node->eof = 1;
}
}
- PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
- goto reap_next_child;
}
static int get_empty_slot(void)
clear_slot(i);
return i;
}
- if (s->write_fd > 0 || s->wpid > 0)
- continue;
- if (s->receiver_node)
- continue;
- if (s->fci)
+ if (s->wng || s->receiver_node || s->fc)
continue;
clear_slot(i);
return i;
return -E_NO_MORE_SLOTS;
}
-static int decoder_running(int format)
-{
- int i, ret = 0;
- struct slot_info *s;
-
- FOR_EACH_SLOT(i) {
- s = &slot[i];
- if (s->format == format && s->receiver_node)
- ret |= 1;
- if (s->format == format && s->wpid > 0)
- ret |= 2;
- }
- return ret;
-}
-
-static void close_stat_pipe(void)
-{
- int i;
-
- if (stat_pipe < 0)
- return;
- PARA_NOTICE_LOG("%s", "closing status pipe\n");
- close(stat_pipe);
- del_close_on_fork_list(stat_pipe);
- stat_pipe = -1;
- kill_all_decoders();
- for (i = 0; i < NUM_STAT_ITEMS; i++) {
- free(stat_item_values[i]);
- stat_item_values[i] = NULL;
- }
- dump_empty_status();
- length_seconds = 0;
- offset_seconds = 0;
- audiod_status_dump();
- playing = 0;
- 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_pipe >= 0)
- close_stat_pipe();
- exit(status);
-}
-
-__malloc static char *glob_cmd(char *cmd)
+/**
+ * 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)
{
- char *ret, *replacement;
- struct timeval tmp, delay, rss; /* real stream start */
-
- delay.tv_sec = conf.stream_delay_arg / 1000;
- delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
-// PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
- if (sa_time_diff_sign < 0)
- tv_add(&server_stream_start, &sa_time_diff, &rss);
- else
- tv_diff(&server_stream_start, &sa_time_diff, &rss);
- tv_add(&rss, &delay, &tmp);
- replacement = make_message("%lu:%lu", tmp.tv_sec, tmp.tv_usec);
- ret = s_a_r(cmd, "STREAM_START", replacement);
- free(replacement);
- if (!ret)
- goto out;
- PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
- {
- struct timeval now;
- gettimeofday(&now, NULL);
- PARA_INFO_LOG("now: %lu:%lu\n", now.tv_sec, now.tv_usec);
- }
-out:
- return ret;
+ return afi[audio_format_num].num_filters;
}
-/** get the number of filters for the given audio format */
-int num_filters(int audio_format_num)
+static void filter_event_handler(struct task *t)
{
- return afi[audio_format_num].num_filters;
+ PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+ struct filter_chain *fc = t->private_data;
+ fc->eof = 1;
+ unregister_task(t);
}
static void open_filters(int slot_num)
int nf = a->num_filters;
int i;
- s->fci = para_calloc(sizeof(struct filter_chain_info));
- INIT_LIST_HEAD(&s->fci->filters);
+ s->fc = NULL;
if (!nf)
return;
- s->fci->inbuf = s->receiver_node->buf;
- s->fci->in_loaded = &s->receiver_node->loaded;
- s->fci->outbuf = s->receiver_node->buf;
- s->fci->out_loaded = &s->receiver_node->loaded;
- s->fci->eof = &s->receiver_node->eof;
+ PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
+ s->fc = para_calloc(sizeof(struct filter_chain));
+ INIT_LIST_HEAD(&s->fc->filters);
+ s->fc->inbuf = s->receiver_node->buf;
+ s->fc->in_loaded = &s->receiver_node->loaded;
+ s->fc->input_eof = &s->receiver_node->eof;
+ s->fc->task.pre_select = filter_pre_select;
+ s->fc->task.event_handler = filter_event_handler;
+ s->fc->task.private_data = s->fc;
+ s->fc->eof = 0;
+
+ s->receiver_node->output_eof = &s->fc->eof;
+ sprintf(s->fc->task.status, "filter chain");
for (i = 0; i < nf; i++) {
struct filter_node *fn = para_calloc(sizeof(struct filter_node));
fn->conf = a->filter_conf[i];
- fn->fci = s->fci;
+ fn->fc = s->fc;
fn->filter = a->filters[i];
INIT_LIST_HEAD(&fn->callbacks);
- list_add_tail(&fn->node, &s->fci->filters);
+ list_add_tail(&fn->node, &s->fc->filters);
fn->filter->open(fn);
PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
audio_formats[s->format], i + 1, nf,
fn->filter->name, slot_num);
- s->fci->outbuf = fn->buf;
- s->fci->out_loaded = &fn->loaded;
+ s->fc->outbuf = fn->buf;
+ s->fc->out_loaded = &fn->loaded;
}
- PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
- s->fci->outbuf);
+ register_task(&s->fc->task);
}
-static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
+static void wng_event_handler(struct task *t)
{
- struct filter_node *fn;
- int i, j;
+ struct writer_node_group *wng = t->private_data;
- FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
- if (s->format < 0 || !s->fci)
- continue;
- if (slot_num >= 0 && slot_num != i)
- continue;
- if (format >= 0 && s->format != format)
- continue;
- if (num_filters(i) < filternum)
- continue;
- /* success */
- j = 1;
- list_for_each_entry(fn, &s->fci->filters, node)
- if (filternum <= 0 || j++ == filternum)
- break;
- return fn;
- }
- return NULL;
+ PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
+ wng->eof = 1;
+ wng_unregister(wng);
}
-static void start_stream_writer(int slot_num)
+static void open_writers(int slot_num)
{
- int ret, fds[3] = {1, -1, -1};
+ int ret, i;
struct slot_info *s = &slot[slot_num];
struct audio_format_info *a = &afi[s->format];
- char *glob = NULL;
-
- if (a->write_cmd)
- glob = glob_cmd(a->write_cmd);
- if (!glob)
- glob = para_strdup("para_play");
- PARA_INFO_LOG("starting stream writer: %s\n", glob);
- open_filters(slot_num);
- ret = para_exec_cmdline_pid(&s->wpid, glob, fds);
- free(glob);
+
+ PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
+ if (!a->num_writers)
+ s->wng = setup_default_wng();
+ else
+ s->wng = wng_new(a->num_writers);
+ if (s->fc) {
+ s->wng->buf = s->fc->outbuf;
+ s->wng->loaded = s->fc->out_loaded;
+ s->wng->input_eof = &s->fc->eof;
+ s->wng->channels = &s->fc->channels;
+ s->wng->samplerate = &s->fc->samplerate;
+ s->fc->output_eof = &s->wng->eof;
+ PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
+ } else {
+ s->wng->buf = s->receiver_node->buf;
+ s->wng->loaded = &s->receiver_node->loaded;
+ s->wng->input_eof = &s->receiver_node->eof;
+ }
+ s->wng->task.event_handler = wng_event_handler;
+ 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];
+ }
+ ret = wng_open(s->wng);
if (ret < 0) {
- PARA_ERROR_LOG("exec failed (%d)\n", ret);
+ PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
return;
}
- s->write_fd = fds[0];
- add_close_on_fork_list(s->write_fd);
- /* we write to this fd in do_select, so we need non-blocking */
- mark_fd_nonblock(s->write_fd);
- gettimeofday(&s->wstime, NULL);
- current_decoder = slot_num;
- activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
+ s->wstime = *now;
+ activate_inactive_grab_clients(slot_num, s->format, &s->fc->filters);
+}
+
+static void rn_event_handler(struct task *t)
+{
+ struct receiver_node *rn = t->private_data;
+ const struct timeval restart_delay = {0, 10 * 1000};
+ int i;
+
+ PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+ unregister_task(t);
+ rn->eof = 1;
+ /* set restart barrier */
+ FOR_EACH_SLOT(i) {
+ if (slot[i].receiver_node != rn)
+ continue;
+ tv_add(now, &restart_delay, &afi[slot[i].format].restart_barrier);
+ }
}
-static void open_receiver(int format)
+static int open_receiver(int format)
{
struct audio_format_info *a = &afi[format];
struct slot_info *s;
int ret, slot_num;
+ struct receiver_node *rn;
+ const struct timeval restart_delay = {1, 0};
- slot_num = get_empty_slot();
- if (slot_num < 0)
- clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
+ ret = get_empty_slot();
+ if (ret < 0)
+ goto err;
+ slot_num = ret;
s = &slot[slot_num];
s->format = format;
- gettimeofday(&s->rtime, NULL);
- s->wtime = s->rtime;
s->receiver_node = para_calloc(sizeof(struct receiver_node));
- s->receiver_node->conf = a->receiver_conf;
+ rn = s->receiver_node;
+ rn->receiver = a->receiver;
+ rn->conf = a->receiver_conf;
ret = a->receiver->open(s->receiver_node);
if (ret < 0) {
- PARA_ERROR_LOG("failed to open receiver (%s)\n",
- PARA_STRERROR(-ret));
free(s->receiver_node);
s->receiver_node = NULL;
- return;
+ goto err;
}
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;
+ rn->task.pre_select = a->receiver->pre_select;
+ rn->task.post_select = a->receiver->post_select;
+ rn->task.event_handler = rn_event_handler;
+ sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
+ register_task(&rn->task);
+ return 1;
+err:
+ PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+ tv_add(now, &restart_delay, &afi[format].restart_barrier);
+ return ret;
}
-static int is_frozen(int format)
+static int receiver_running(int format)
{
- struct timeval now;
- struct audio_format_info *a = &afi[format];
+ int i;
- gettimeofday(&now, NULL);
- return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
+ FOR_EACH_SLOT(i) {
+ struct slot_info *s = &slot[i];
+ if (s->format == format && s->receiver_node
+ && !s->receiver_node->eof)
+ return 1;
+ }
+ return 0;
}
-static void start_current_receiver(void)
+static int open_current_receiver(struct sched *s)
{
int i;
+ struct timeval diff;
+ char *audio_format = stat_task->stat_item_values[SI_FORMAT];
- if (!af_status)
- return;
- i = get_audio_format_num(af_status);
+ if (!audio_format || !stat_task->pcd)
+ return 0;
+ i = get_audio_format_num(audio_format + strlen(
+ status_item_list[SI_FORMAT]) + 1);
if (i < 0)
- return;
- if ((decoder_running(i) & 1) || is_frozen(i))
- return;
- open_receiver(i);
+ return 0;
+ if (receiver_running(i))
+ return 0;
+ if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
+ s->timeout = diff;
+ return 0;
+ }
+ return open_receiver(i) < 0? 0 : 1;
}
-static void compute_time_diff(const struct timeval *status_time)
+static unsigned compute_time_diff(const struct timeval *status_time)
{
- struct timeval now, tmp, diff;
- static int count;
- int sign;
+ struct timeval tmp, diff;
+ static unsigned count;
+ int sign, sa_time_diff_sign = stat_task->sa_time_diff_sign;
const struct timeval max_deviation = {0, 500 * 1000};
const int time_smooth = 5;
- gettimeofday(&now, NULL);
- sign = tv_diff(status_time, &now, &diff);
+ if (!status_time)
+ return count;
+ 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) {
sa_time_diff_sign = sign;
- sa_time_diff = diff;
+ stat_task->sa_time_diff = diff;
count++;
- return;
+ goto out;
}
if (count > 5) {
- int s = tv_diff(&diff, &sa_time_diff, &tmp);
+ int s = tv_diff(&diff, &stat_task->sa_time_diff, &tmp);
if (tv_diff(&max_deviation, &tmp, NULL) < 0)
PARA_WARNING_LOG("time diff jump: %lims\n",
s * tv2ms(&tmp));
}
count++;
sa_time_diff_sign = tv_convex_combination(
- sa_time_diff_sign * time_smooth, &sa_time_diff,
+ sa_time_diff_sign * time_smooth, &stat_task->sa_time_diff,
count > 10? sign : sign * time_smooth, &diff,
&tmp);
- sa_time_diff = tmp;
+ stat_task->sa_time_diff = tmp;
PARA_INFO_LOG("time diff (cur/avg): %s%lums/%s%lums\n",
sign > 0? "+" : "-",
tv2ms(&diff),
sa_time_diff_sign ? "+" : "-",
- tv2ms(&sa_time_diff)
+ tv2ms(&stat_task->sa_time_diff)
);
+out:
+ stat_task->sa_time_diff_sign = sa_time_diff_sign;
+ return count;
}
static void check_stat_line(char *line)
{
int itemnum;
size_t ilen = 0;
- struct timeval tv;
+ long unsigned sec, usec;
char *tmp;
- PARA_INFO_LOG("line: %s\n", line);
+// PARA_INFO_LOG("line: %s\n", line);
if (!line)
return;
itemnum = stat_line_valid(line);
PARA_WARNING_LOG("invalid status line: %s\n", line);
return;
}
+ if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
+ return;
tmp = make_message("%s\n", line);
stat_client_write(tmp, itemnum);
free(tmp);
- free(stat_item_values[itemnum]);
- stat_item_values[itemnum] = para_strdup(line);
+ free(stat_task->stat_item_values[itemnum]);
+ stat_task->stat_item_values[itemnum] = para_strdup(line);
ilen = strlen(status_item_list[itemnum]);
switch (itemnum) {
case SI_STATUS:
- playing = strstr(line, "playing")? 1 : 0;
- break;
- case SI_FORMAT:
- free(af_status);
- af_status = para_strdup(line + ilen + 1);
+ stat_task->playing = strstr(line, "playing")? 1 : 0;
break;
case SI_OFFSET:
- offset_seconds = atoi(line + ilen + 1);
+ stat_task->offset_seconds = atoi(line + ilen + 1);
break;
case SI_LENGTH:
- length_seconds = atoi(line + ilen + 1);
+ stat_task->length_seconds = atoi(line + ilen + 1);
break;
case SI_STREAM_START:
- if (sscanf(line + ilen + 1, "%lu.%lu",
- &tv.tv_sec, &tv.tv_usec) == 2)
- server_stream_start = tv;
+ if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
+ struct timeval a_start, delay;
+ delay.tv_sec = conf.stream_delay_arg / 1000;
+ delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
+ stat_task->server_stream_start.tv_sec = sec;
+ stat_task->server_stream_start.tv_usec = usec;
+ if (compute_time_diff(NULL) > 2) {
+ if (stat_task->sa_time_diff_sign < 0)
+ tv_add(&stat_task->server_stream_start,
+ &stat_task->sa_time_diff, &a_start);
+ else
+ tv_diff(&stat_task->server_stream_start,
+ &stat_task->sa_time_diff, &a_start);
+ tv_add(&a_start, &delay, &initial_delay_barrier);
+ }
+ }
break;
case SI_CURRENT_TIME:
- if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
- &tv.tv_usec) == 2)
+ if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
+ struct timeval tv = {sec, usec};
compute_time_diff(&tv);
- break;
- }
-}
-
-static void handle_signal(int sig)
-{
- switch (sig) {
- case SIGCHLD:
- return check_sigchld();
- case SIGINT:
- case SIGTERM:
- case SIGHUP:
- PARA_EMERG_LOG("terminating on signal %d\n", sig);
- clean_exit(EXIT_FAILURE, "caught deadly signal");
- return;
- }
-}
-
-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 input buffer (slot %d) not ready\n",
- audio_formats[s->format], slot_num);
- if (s->fci)
- s->fci->error = 42;
- else
- close_receiver(slot_num);
}
- /* check write time */
- if (s->wpid > 0 && !s->wkilled &&
- now.tv_sec > s->wtime.tv_sec + timeout) {
- PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
- audio_formats[s->format], slot_num);
- if (s->fci)
- s->fci->error = 42;
- }
- }
-}
-
-static size_t get_loaded_bytes(int slot_num)
-{
- size_t loaded = 0;
- struct slot_info *s = &slot[slot_num];
- struct receiver_node *rn = s->receiver_node;
-
- if (s->format < 0)
- goto out;
-
- if (afi[s->format].num_filters) {
- if (s->fci)
- loaded = *s->fci->out_loaded;
- } else {
- if (rn)
- loaded = rn->loaded;
+ if (stat_task->clock_diff_count)
+ stat_task->clock_diff_count--;
+ break;
}
-out:
- return loaded;
}
-
-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];
- struct receiver_node *rn = s->receiver_node;
if (s->format < 0)
return;
- if (!s->fci)
+ if (s->receiver_node && !s->receiver_node->eof)
return;
- if (!rn->eof && !s->fci->error && s->wpid > 0)
+ if (s->fc && !s->fc->eof)
return;
- if (!s->fci->error && s->wpid > 0) { /* eof */
- if (filter_io(s->fci) > 0)
- return;
- if (get_loaded_bytes(slot_num))
- return;
- }
- if (s->write_fd > 0) {
- PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
- s->write_fd);
- close(s->write_fd);
- del_close_on_fork_list(s->write_fd);
- s->write_fd = -1;
- }
- if (s->wpid > 0)
- return; /* wait until writer dies before closing filters */
- PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
- slot_num, s->fci);
- close_filters(s->fci);
- free(s->fci);
+ if (s->wng && !s->wng->eof)
+ return;
+ PARA_INFO_LOG("closing slot %d \n", slot_num);
+ wng_close(s->wng);
+ close_filters(s->fc);
+ free(s->fc);
close_receiver(slot_num);
clear_slot(slot_num);
}
-static void set_stream_fds(fd_set *wfds, int *max_fileno)
+/*
+ * Check if any receivers/filters/writers need to be started and do so if
+ * neccessary. Since the pre_select function didn't have a chance yet to put
+ * file descriptors into the fd sets given by s, make the upcoming select()
+ * return immediately to avoid a long timeout in case we started something.
+ */
+static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
{
int i;
+ struct timeval min_delay = {0, 1};
- check_timeouts();
+ t->ret = 1;
+ if (audiod_status != AUDIOD_ON || !stat_task->playing)
+ return kill_all_decoders();
+ if (open_current_receiver(s))
+ s->timeout = min_delay;
FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
+ struct slot_info *sl = &slot[i];
struct audio_format_info *a;
- struct receiver_node *rn;
+ struct timeval diff;
- close_decoder_if_idle(i);
- s->wcheck = 0;
- if (s->format < 0)
+ if (sl->format < 0)
+ continue;
+ a = &afi[sl->format];
+ if (!sl->receiver_node)
+ continue;
+ if (!a->num_filters) {
+ if (sl->receiver_node->loaded && !sl->wng) {
+ open_writers(i);
+ s->timeout = min_delay;
+ }
continue;
- a = &afi[s->format];
- rn = s->receiver_node;
- if (rn && rn->loaded && !s->wpid) {
- PARA_INFO_LOG("no writer in slot %d\n", i);
- start_stream_writer(i);
}
- if (s->write_fd <= 0)
+ if (sl->receiver_node->loaded && !sl->fc) {
+ open_filters(i);
+ s->timeout = min_delay;
continue;
- if (!get_loaded_bytes(i))
+ }
+ if (!sl->fc || !*sl->fc->out_loaded || sl->wng)
+ continue;
+ if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
+ open_writers(i);
+ s->timeout = min_delay;
continue;
- para_fd_set(s->write_fd, wfds, max_fileno);
- s->wcheck = 1;
+ }
+ PARA_INFO_LOG("inital delay: %lu ms left\n", tv2ms(&diff));
+ if (tv_diff(&s->timeout, &diff, NULL) > 0) {
+ s->timeout = diff;
+ }
}
}
-static int write_audio_data(int slot_num)
+static void audiod_post_select(__a_unused struct sched *s,
+ __a_unused struct task *t)
{
- struct slot_info *s = &slot[slot_num];
- struct audio_format_info *a = &afi[s->format];
- struct receiver_node *rn = s->receiver_node;
- int rv;
- char **buf;
- size_t *len;
-
- if (a->num_filters) {
- buf = &s->fci->outbuf;
- len = s->fci->out_loaded;
- } else {
- buf = &rn->buf;
- len = &rn->loaded;
- }
- PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
- rv = write(s->write_fd, *buf, *len);
- PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
- if (rv < 0) {
- PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
- slot_num, s->write_fd, strerror(errno));
- *len = 0;
- s->fci->error = E_WRITE_AUDIO_DATA;
- } else if (rv != *len) {
- PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
- audio_formats[s->format], rv, *len, slot_num);
- *len -= rv;
- memmove(*buf, *buf + rv, *len);
- } else
- *len = 0;
- if (rv > 0)
- gettimeofday(&s->wtime, NULL);
- return rv;
+ int i;
+
+ t->ret = 1;
+ FOR_EACH_SLOT(i)
+ try_to_close_slot(i);
}
-static void slot_io(fd_set *wfds)
+static void init_audiod_task(struct task *t)
{
- int ret, i;
-
- FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
- struct receiver_node *rn = s->receiver_node;
-
- if (rn && rn->loaded)
- gettimeofday(&s->rtime, NULL);
- if (s->format >= 0 && s->write_fd > 0 && s->fci) {
- ret = filter_io(s->fci);
- if (ret < 0)
- s->fci->error = -ret;
-// PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
-// i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
- }
- if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
- continue;
- write_audio_data(i);
- }
+ t->pre_select = audiod_pre_select;
+ t->post_select = audiod_post_select;
+ t->event_handler = NULL;
+ t->private_data = t;
+ sprintf(t->status, "audiod task");
}
static int parse_stream_command(const char *txt, char **cmd)
return filter_num;
}
-static int setup_default_filters(void)
+static int init_writers(void)
{
- int i, ret = 1;
+ int i, ret, nw;
+ char *cmd;
+ struct audio_format_info *a;
+ init_supported_writers();
+ nw = PARA_MAX(1, conf.writer_given);
+ PARA_INFO_LOG("maximal number of writers: %d\n", nw);
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);
+ a = &afi[i];
+ a->writer_conf = para_malloc(nw * sizeof(void *));
+ a->writers = para_malloc(nw * sizeof(struct writer *));
+ a->num_writers = 0;
+ }
+ for (i = 0; i < conf.writer_given; i++) {
+ void *wconf;
+ int writer_num;
+ ret = parse_stream_command(conf.writer_arg[i], &cmd);
if (ret < 0)
goto out;
- PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
- ret = add_filter(i, para_strdup("wav"));
- if (ret < 0)
+ a = &afi[ret];
+ nw = a->num_writers;
+ wconf = check_writer_arg(cmd, &writer_num);
+ if (!wconf) {
+ ret = writer_num;
goto out;
- PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
+ }
+ 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]);
+ a->num_writers++;
}
+ ret = 1;
out:
return ret;
}
-static int init_stream_io(void)
+static int init_receivers(void)
{
- int i, ret, receiver_num, nf;
- char *cmd;
+ int i, ret, receiver_num;
+ char *cmd = NULL;
+ struct audio_format_info *a;
- for (i = 0; i < conf.stream_write_cmd_given; i++) {
- ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
- if (ret < 0)
- goto out;
- afi[ret].write_cmd = para_strdup(cmd);
- PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
- }
for (i = 0; receivers[i].name; i++) {
PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
receivers[i].init(&receivers[i]);
}
- for (i = 0; i < conf.receiver_given; i++) {
+ for (i = conf.receiver_given - 1; i >= 0; i--) {
char *arg = conf.receiver_arg[i];
- char *recv = strchr(arg, ':');
+ char *recv_arg = strchr(arg, ':');
ret = -E_MISSING_COLON;
- if (!recv)
+ if (!recv_arg)
goto out;
- *recv = '\0';
- recv++;
+ *recv_arg = '\0';
+ recv_arg++;
ret = get_audio_format_num(arg);
if (ret < 0)
goto out;
- afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
+ afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
if (!afi[ret].receiver_conf) {
ret = -E_RECV_SYNTAX;
goto out;
*/
cmd = para_strdup(receivers[0].name);
FOR_EACH_AUDIO_FORMAT(i) {
- struct audio_format_info *a = &afi[i];
+ a = &afi[i];
if (a->receiver_conf)
continue;
a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
return -E_RECV_SYNTAX;
a->receiver = &receivers[receiver_num];
}
+ ret = 1;
+out:
free(cmd);
- /* filters */
+ 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(char *));
+ 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;
}
-static int dump_commands(int fd)
+static int init_stream_io(void)
{
- char *buf = para_strdup(""), *tmp = NULL;
- int i;
- ssize_t ret;
+ int ret;
- FOR_EACH_COMMAND(i) {
- tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
- cmds[i].description);
- free(buf);
- buf = tmp;
- }
- ret = client_write(fd, buf);
- free(buf);
- return ret;
+ ret = init_writers();
+ if (ret < 0)
+ return ret;
+ ret = init_receivers();
+ if (ret < 0)
+ return ret;
+ ret = init_filters();
+ if (ret < 0)
+ return ret;
+ return 1;
}
-/*
- * command handlers don't close their fd on errors (ret < 0) so that
- * its caller can send an error message. Otherwise (ret >= 0) it's up
- * to each individual command to close the fd if necessary.
- */
-
-static int com_help(int fd, int argc, char **argv)
+static int audiod_get_socket(void)
{
- int i, ret;
- char *buf;
- const char *dflt = "No such command. Available commands:\n";
-
- if (argc < 2) {
- ret = dump_commands(fd);
- goto out;
- }
- FOR_EACH_COMMAND(i) {
- if (strcmp(cmds[i].name, argv[1]))
- continue;
- buf = make_message(
- "NAME\n\t%s -- %s\n"
- "SYNOPSIS\n\tpara_audioc %s\n"
- "DESCRIPTION\n%s\n",
- argv[1],
- cmds[i].description,
- cmds[i].synopsis,
- cmds[i].help
- );
- ret = client_write(fd, buf);
- free(buf);
- goto out;
- }
- ret = client_write(fd, dflt);
- if (ret > 0)
- ret = dump_commands(fd);
-out:
- if (ret >= 0)
- close(fd);
- return ret;
-}
+ struct sockaddr_un unix_addr;
+ int fd;
-static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
-{
- int i, ret;
- char *buf = NULL;
- long unsigned mask = ~0LU;
-
- if (argc > 1) {
- mask = 0;
- for (i = 1; i < argc; i++) {
- ret = stat_item_valid(argv[i]);
- if (ret < 0)
- return ret;
- mask |= (1 << ret);
- }
- }
- PARA_INFO_LOG("mask: 0x%lx\n", mask);
- if (mask & (1 << SI_PLAY_TIME)) {
- struct timeval *t = wstime();
- char *ts = get_time_string(t);
- if (ts) {
- ret = client_write(fd, ts);
- if (ret < 0)
- goto out;
- free(ts);
- }
- }
- if (mask & (1 << SI_AUDIOD_UPTIME)) {
- char *tmp, *us = uptime_str();
- tmp = make_message("%s:%s\n",
- status_item_list[SI_AUDIOD_UPTIME], us);
- free(us);
- ret = client_write(fd, tmp);
- if (ret < 0)
- goto out;
- free(tmp);
- }
- if (mask & (1 << SI_AUDIOD_STATUS)) {
- char *s = audiod_status_string();
- ret = client_write(fd, s);
- if (ret < 0)
- goto out;
- free(s);
+ if (conf.socket_given)
+ socket_name = para_strdup(conf.socket_arg);
+ else {
+ char *hn = para_hostname();
+ socket_name = make_message("/var/paraslash/audiod_socket.%s",
+ hn);
+ free(hn);
}
- if (mask & (1 << SI_DECODER_FLAGS)) {
- char *df =decoder_flags();
- ret = client_write(fd, df);
- if (ret < 0)
- goto out;
- free(df);
+ PARA_NOTICE_LOG("local socket: %s\n", socket_name);
+ if (conf.force_given)
+ unlink(socket_name);
+ fd = create_pf_socket(socket_name, &unix_addr,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
+ if (fd < 0) {
+ PARA_EMERG_LOG("%s", "can not connect to socket\n");
+ exit(EXIT_FAILURE); /* do not unlink socket */
}
-
- for (i = 0; i < NUM_STAT_ITEMS; i++) {
- char *tmp, *v;
- if (!((1 << i) & mask))
- continue;
- v = stat_item_values[i];
- tmp = make_message("%s%s%s", buf? buf: "",
- v? v : "", v? "\n" : "");
- free(buf);
- buf = tmp;
+ if (listen(fd , 5) < 0) {
+ PARA_EMERG_LOG("%s", "can not listen on socket\n");
+ exit(EXIT_FAILURE); /* do not unlink socket */
}
- ret = client_write(fd, buf);
-out:
- if (ret > 0)
- ret = stat_client_add(fd, mask);
- free(buf);
- return ret;
+ mark_fd_nonblock(fd);
+ return fd;
}
-#if 0
-static char *list_filters(void)
+static void signal_event_handler(struct task *t)
{
- int i, j;
- char *tmp, *msg = make_message("format\tnum\tcmd\n");
+ struct signal_task *st = t->private_data;
- FOR_EACH_AUDIO_FORMAT(i) {
- for (j = 0; j < afi[i].num_filters; j++) {
- tmp = make_message("%s\t%i\t%s\n",
- afi[i].name, j, afi[i].filter_cmds[j]);
- msg = para_strcat(msg, tmp);
- free(tmp);
- }
- tmp = make_message("%s\t%i\t%s\n", afi[i].name,
- j, afi[i].write_cmd);
- msg = para_strcat(msg, tmp);
- free(tmp);
+ switch (st->signum) {
+ case SIGINT:
+ case SIGTERM:
+ case SIGHUP:
+ PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
+ clean_exit(EXIT_FAILURE, "caught deadly signal");
}
- return msg;
}
-#endif
-static int com_grab(int fd, int argc, char **argv)
+static void signal_pre_select(struct sched *s, struct task *t)
{
- struct grab_client *gc;
- struct filter_node *fn;
- int i, err;
- char *msg;
-
- PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
- gc = grab_client_new(fd, argc, argv, &err);
- PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
- if (!gc)
- goto err_out;
- fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
- if (fn)
- activate_grab_client(gc, fn);
- return 1;
-err_out:
- if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
- return err;
- if (err == -E_GC_HELP_GIVEN) {
- msg = make_message("%s\n\n", grab_client_args_info_usage);
- for (i = 0; grab_client_args_info_help[i]; i++) {
- char *tmp = make_message("%s%s\n", msg,
- grab_client_args_info_help[i]);
- free(msg);
- msg = tmp;
- }
- } else
- msg = make_message("%s %s\n",
- GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
- GRAB_CLIENT_CMDLINE_PARSER_VERSION);
- err = client_write(fd, msg);
- free(msg);
- if (err < 0)
- return err;
- close(fd);
- return 1;
+ struct signal_task *st = t->private_data;
+ t->ret = 1;
+ para_fd_set(st->fd, &s->rfds, &s->max_fileno);
}
-static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
+static void signal_post_select(struct sched *s, struct task *t)
{
- close(fd);
- clean_exit(EXIT_SUCCESS, "terminating on user request");
+ struct signal_task *st = t->private_data;
+ t->ret = 1;
+ if (!FD_ISSET(st->fd, &s->rfds))
+ return;
+ t->ret = -E_SIGNAL_CAUGHT;
+ st->signum = para_next_signal();
}
-static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
+static void signal_setup_default(struct signal_task *st)
{
- audiod_status = AUDIOD_ON;
- close(fd);
- return 1;
+ st->task.pre_select = signal_pre_select;
+ st->task.post_select = signal_post_select;
+ st->task.private_data = st;
+ sprintf(st->task.status, "signal task");
}
-static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
+static void command_pre_select(struct sched *s, struct task *t)
{
- audiod_status = AUDIOD_OFF;
- close(fd);
- return 1;
-}
+ struct command_task *ct = t->private_data;
+ t->ret = 1;
+ para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
-static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
-{
- audiod_status = AUDIOD_STANDBY;
- close(fd);
- return 1;
}
-static int com_cycle(int fd, int argc, char **argv)
+static void command_post_select(struct sched *s, struct task *t)
{
- switch (audiod_status) {
- case AUDIOD_ON:
- return com_sb(fd, argc, argv);
- break;
- case AUDIOD_OFF:
- return com_on(fd, argc, argv);
- break;
- case AUDIOD_STANDBY:
- return com_off(fd, argc, argv);
- break;
- }
- close(fd);
- return 1;
+ int ret;
+ struct command_task *ct = t->private_data;
+
+ t->ret = 1; /* always successful */
+ audiod_status_dump();
+ if (!FD_ISSET(ct->fd, &s->rfds))
+ return;
+ ret = handle_connect(ct->fd);
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
}
-static int check_perms(uid_t uid)
+static void init_command_task(struct command_task *ct)
{
- int i;
-
- if (!conf.user_allow_given)
- return 1;
- for (i = 0; i < conf.user_allow_given; i++)
- if (uid == conf.user_allow_arg[i])
- return 1;
- return -E_UCRED_PERM;
+ 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->fd = audiod_get_socket(); /* doesn't return on errors */
+ sprintf(ct->task.status, "command task");
}
-static int handle_connect(void)
+static void close_stat_pipe(void)
{
- int i, argc, ret, clifd = -1;
- char *buf = para_malloc(MAXLINE), **argv = NULL;
- struct sockaddr_un unix_addr;
+ int i;
- ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
- if (ret < 0)
- goto out;
- clifd = ret;
- ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
- if (ret < 0)
- goto out;
- PARA_INFO_LOG("connection from user %i\n", ret);
- ret = check_perms(ret);
- if (ret < 0)
- goto out;
- argc = split_args(buf, &argv, "\n");
- PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
- for (i = 0; cmds[i].name; i++) {
- if (strcmp(cmds[i].name, argv[0]))
- continue;
- ret = cmds[i].handler(clifd, argc, argv);
- goto out;
+ if (!stat_task->pcd)
+ return;
+ client_close(stat_task->pcd);
+ stat_task->pcd = NULL;
+ for (i = 0; i < NUM_STAT_ITEMS; i++) {
+ free(stat_task->stat_item_values[i]);
+ stat_task->stat_item_values[i] = NULL;
}
- ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
-out:
- free(buf);
- free(argv);
- if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
- char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
- client_write(clifd, tmp);
- free(tmp);
- close(clifd);
+ dump_empty_status();
+ stat_task->length_seconds = 0;
+ stat_task->offset_seconds = 0;
+ audiod_status_dump();
+ stat_task->playing = 0;
+ stat_task->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_task->stat_item_values[SI_STATUS_BAR],
+ SI_STATUS_BAR);
+ if (stat_task->clock_diff_count) {
+ stat_task->clock_diff_barrier.tv_sec = now->tv_sec + 1;
+ stat_task->clock_diff_barrier.tv_usec = now->tv_usec;
}
- return ret;
}
-static void audiod_get_socket(void)
+/**
+ * close the connection to para_server and exit
+ *
+ * \param status the exit status which is passed to exit(3)
+ * \param msg the log message
+ *
+ * Log \a msg with loglevel \p EMERG, close the connection to para_server if
+ * open, and call \p exit(status). \a status should be either EXIT_SUCCESS or
+ * EXIT_FAILURE.
+ *
+ * \sa exit(3)
+ */
+void __noreturn clean_exit(int status, const char *msg)
{
- struct sockaddr_un unix_addr;
-
- if (conf.socket_given)
- socket_name = para_strdup(conf.socket_arg);
- else {
- char *hn = para_hostname();
- socket_name = make_message("/var/paraslash/audiod_socket.%s",
- hn);
- free(hn);
- }
- PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
- if (conf.force_given)
+ PARA_EMERG_LOG("%s\n", msg);
+ if (socket_name)
unlink(socket_name);
- audiod_socket = create_pf_socket(socket_name, &unix_addr,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
- if (audiod_socket < 0) {
- PARA_EMERG_LOG("%s", "can not connect to socket\n");
- exit(EXIT_FAILURE); /* do not unlink socket */
- }
- if (listen(audiod_socket, 5) < 0) {
- PARA_EMERG_LOG("%s", "can not listen on socket\n");
- exit(EXIT_FAILURE); /* do not unlink socket */
- }
- add_close_on_fork_list(audiod_socket);
+ close_stat_pipe();
+ exit(status);
}
-static int open_stat_pipe(void)
+/* avoid busy loop if server is down */
+static void set_stat_task_restart_barrier(void)
{
- int ret, fd[3] = {-1, 1, 0};
- pid_t pid;
- ret = para_exec_cmdline_pid(&pid, BINDIR "/para_client stat", fd);
- if (ret >= 0) {
- ret = fd[1];
- PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
- add_close_on_fork_list(ret);
- } else
- clean_exit(EXIT_FAILURE, "failed to open status pipe");
- return ret;
+ struct timeval delay = {5, 0};
+ tv_add(now, &delay, &stat_task->restart_barrier);
}
-static void audiod_pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv,
- int *max_fileno)
+static void client_task_event_handler(__a_unused struct task *t)
{
- int i, ret;
+ int i;
- FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
- struct audio_format_info *a;
- struct receiver_node *rn = s->receiver_node;
- if (s->format < 0 || !rn)
- continue;
- a = &afi[s->format];
- ret = a->receiver->pre_select(rn, rfds, wfds, tv);
-// PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
- *max_fileno = PARA_MAX(*max_fileno, ret);
- }
+ if (t->ret == -E_HANDSHAKE_COMPLETE)
+ return;
+ unregister_task(t);
+ close_stat_pipe();
+ if (t->ret != -E_SERVER_EOF)
+ stat_task->clock_diff_count = conf.clock_diff_count_arg;
+ set_stat_task_restart_barrier();
+ FOR_EACH_AUDIO_FORMAT(i)
+ afi[i].restart_barrier = stat_task->restart_barrier;
}
-static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
+
+static void status_pre_select(struct sched *s, struct task *t)
{
- int i, ret;
+ struct status_task *st = t->private_data;
+ int ret;
- FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
- struct audio_format_info *a;
- struct receiver_node *rn = s->receiver_node;
- if (s->format < 0 || !rn || rn->eof)
- continue;
- a = &afi[s->format];
- ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
- if (ret <= 0) {
- if (ret)
- PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
- a->receiver->name, PARA_STRERROR(-ret), i);
- else
- PARA_INFO_LOG("eof in slot %d\n", i);
- rn->eof = 1;
- }
- if (ret < 0 && s->fci)
- s->fci->error = ret;
+ t->ret = 1; /* always successful */
+ if (st->pcd || audiod_status == AUDIOD_OFF)
+ return;
+ if (!st->clock_diff_count && tv_diff(now, &st->restart_barrier, NULL)
+ < 0)
+ return;
+ if (st->clock_diff_count) {
+ char *argv[] = {"audiod", "stat", "1", NULL};
+ int argc = 3;
+ if (tv_diff(now, &st->clock_diff_barrier, NULL) < 0)
+ return;
+ PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
+ ret = client_open(argc, argv, &st->pcd);
+
+ } else {
+ char *argv[] = {"audiod", "stat", NULL};
+ int argc = 2;
+ ret = client_open(argc, argv, &st->pcd);
}
+ set_stat_task_restart_barrier();
+ if (ret < 0)
+ return;
+ st->pcd->task.event_handler = client_task_event_handler;
+ s->timeout.tv_sec = 0;
+ s->timeout.tv_usec = 1;
}
-/* TODO: move everything before the select call to pre_select() */
-static void __noreturn audiod_mainloop(void)
+static void status_post_select(__a_unused struct sched *s, struct task *t)
{
- fd_set rfds, wfds;
- int ret, max_fileno, sbo = 0;
- char status_buf[STRINGSIZE] = "";
- struct timeval tv;
-repeat:
- FD_ZERO(&wfds);
- FD_ZERO(&rfds);
- /* always check signal pipe and the local socket */
- FD_SET(signal_pipe, &rfds);
- max_fileno = signal_pipe;
- para_fd_set(audiod_socket, &rfds, &max_fileno);
-
- if (audiod_status != AUDIOD_ON)
- kill_all_decoders();
- else if (playing)
- start_current_receiver();
-
- set_stream_fds(&wfds, &max_fileno);
- /* status pipe */
- if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
+ struct status_task *st = t->private_data;
+ unsigned bytes_left;
+
+ t->ret = 1;
+ if (!st->pcd || st->pcd->status != CL_RECEIVING)
+ return;
+ if (st->pcd && audiod_status == AUDIOD_OFF) {
+ unregister_task(&st->pcd->task);
close_stat_pipe();
- if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
- stat_pipe = open_stat_pipe();
- sbo = 0;
- status_buf[0] = '\0';
+ st->clock_diff_count = conf.clock_diff_count_arg;
+ return;
}
- if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF)
- para_fd_set(stat_pipe, &rfds, &max_fileno);
- /* local socket */
- tv.tv_sec = 0;
- tv.tv_usec = 200 * 1000;
- audiod_pre_select(&rfds, &wfds, &tv, &max_fileno);
- ret = para_select(max_fileno + 1, &rfds, &wfds, &tv);
- if (ret < 0)
- goto repeat;
- if (audiod_status != AUDIOD_OFF)
- audiod_status_dump();
- audiod_post_select(ret, &rfds, &wfds);
- /* read status pipe */
- if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
- ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
- if (ret <= 0) {
+ bytes_left = for_each_line(st->pcd->buf, st->pcd->loaded,
+ &check_stat_line);
+ if (st->pcd->loaded != bytes_left) {
+ st->last_status_read = *now;
+ st->pcd->loaded = bytes_left;
+ } else {
+ struct timeval diff;
+ tv_diff(now, &st->last_status_read, &diff);
+ if (diff.tv_sec > 61)
close_stat_pipe();
- /* avoid busy loop if server is down */
- while (sleep(1) > 0)
- ; /* try again*/
- } else {
- status_buf[ret + sbo] = '\0';
- sbo = for_each_line(status_buf, ret + sbo,
- &check_stat_line);
- }
- }
- slot_io(&wfds);
- if (FD_ISSET(audiod_socket, &rfds)) {
- ret = handle_connect();
- if (ret < 0) {
- PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
- }
- }
- /* signals */
- if (FD_ISSET(signal_pipe, &rfds)) {
- int sig_nr = para_next_signal();
- if (sig_nr > 0)
- handle_signal(sig_nr);
}
- goto repeat;
+}
+
+static void init_status_task(struct status_task *st)
+{
+ memset(st, 0, sizeof(struct status_task));
+ st->task.pre_select = status_pre_select;
+ st->task.post_select = status_post_select;
+ st->task.private_data = st;
+ st->sa_time_diff_sign = 1;
+ st->clock_diff_count = conf.clock_diff_count_arg;
+ sprintf(st->task.status, "status task");
}
static void set_initial_status(void)
PARA_WARNING_LOG("%s", "invalid mode\n");
}
-int __noreturn main(int argc, char *argv[])
+/**
+ * the main function of para_audiod
+ *
+ * \param argc usual argument count
+ * \param argv usual argument vector
+ *
+ * \return EXIT_SUCCESS or EXIT_FAILURE
+ *
+ * \sa para_audiod(1)
+ * */
+int main(int argc, char *argv[])
{
char *cf;
- int i;
+ 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;
- fprintf(stderr, "argc: %d\n", argc);
valid_fd_012();
- hostname = para_hostname();
- cmdline_parser(argc, argv, &conf);
+ audiod_cmdline_parser(argc, argv, &conf);
+ HANDLE_VERSION_FLAG("audiod", conf);
para_drop_privileges(conf.user_arg, conf.group_arg);
cf = configfile_exists();
if (cf) {
- if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
+ if (audiod_cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
PARA_EMERG_LOG("%s", "parse error in config file\n");
exit(EXIT_FAILURE);
}
clear_slot(i);
init_grabbing();
setup_signal_handling();
+ 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(audiod_task);
+
if (conf.daemon_given)
daemon_init();
- audiod_get_socket(); /* doesn't return on errors */
- audiod_mainloop();
+
+ register_task(&sig_task->task);
+ register_task(&cmd_task->task);
+ register_task(&stat_task->task);
+ register_task(audiod_task);
+ s.default_timeout.tv_sec = 0;
+ s.default_timeout.tv_usec = 99 * 1000;
+ ret = sched(&s);
+
+ PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+ return EXIT_FAILURE;
}
projects / paraslash.git / blobdiff