/*
- * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
+ * Copyright (C) 2005-2012 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
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
-/** \file audiod.c the paraslash's audio daemon */
+/** \file audiod.c The paraslash's audio daemon. */
+#include <regex.h>
+#include <sys/types.h>
+#include <signal.h>
-#include <sys/time.h> /* gettimeofday */
#include "para.h"
-
+#include "error.h"
+#include "crypt.h"
#include "audiod.cmdline.h"
#include "list.h"
-#include "close_on_fork.h"
#include "sched.h"
+#include "ggo.h"
#include "recv.h"
+#include "buffer_tree.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 "signal.h"
+#include "version.h"
+__printf_2_3 void (*para_log)(int, const char*, ...) = daemon_log;
/** 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 */
+/** Defines how audiod handles 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 */
- struct filter **filters;
-/** pointer to the array of filter configurations */
+ /** Array of filter numbers to be activated. */
+ unsigned *filter_nums;
+ /** 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;
+ /** Array of writer numbers to be activated. */
+ int *writer_nums;
+ /** 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 *fc;
+ * \sa struct slot_info
+ * */
+struct slot_info slot[MAX_STREAM_SLOTS];
+
+/** The vss status flags audiod is interested in. */
+enum vss_status_flags {
+ /** Whether the 'N' flag is set. */
+ VSS_STATUS_FLAG_NEXT = 1,
+ /** The 'P' flag is set. */
+ VSS_STATUS_FLAG_PLAYING = 2,
};
-static struct slot_info slot[MAX_STREAM_SLOTS];
-
-extern const char *status_item_list[NUM_STAT_ITEMS];
-
-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;
-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 signal_task signal_task_struct, *sig_task = &signal_task_struct;
-struct command_task {
- int fd;
- struct task task;
-};
-static struct command_task command_task_struct, *cmd_task = &command_task_struct;
+/**
+ * The scheduler instance of para_audiod.
+ *
+ * This is needed also in audiod_command.c (for the tasks command), so it can
+ * not be made static.
+ */
+struct sched sched = {.max_fileno = 0};
+/**
+ * The task for obtaining para_server's status (para_client stat).
+ *
+ * \sa struct task, struct sched.
+ */
struct status_task {
- int fd;
- struct task task;
- char buf[STRINGSIZE];
- unsigned loaded;
-};
-static struct status_task status_task_struct, *stat_task = &status_task_struct;
-
-struct audiod_task {
- struct task task;
-};
-static struct audiod_task audiod_task_struct, *at = &audiod_task_struct;
-
-struct signal_task {
- int fd;
- int signum;
+ /** The associated task structure of audiod. */
struct task task;
+ /** Client data associated with the stat task. */
+ struct client_task *ct;
+ /** Do not restart client command until this time. */
+ struct timeval restart_barrier;
+ /** Last time we received status data from para_server. */
+ struct timeval last_status_read;
+ size_t min_iqs;
+ /** The offset value announced by para_server. */
+ int offset_seconds;
+ /** The length of the current audio file as announced by para_server. */
+ int length_seconds;
+ /** The start of the current stream from the view of para_server. */
+ struct timeval server_stream_start;
+ /** The average time deviation between para_server and para_audiod. */
+ struct timeval sa_time_diff;
+ /** Whether client time is ahead of server time. */
+ int sa_time_diff_sign;
+ /** The 'P' and the 'N' flags as announced by para_server. */
+ enum vss_status_flags vss_status;
+ /** Number of times the clock difference is to be checked. */
+ unsigned clock_diff_count;
+ /** When to start the next check for clock difference. */
+ struct timeval clock_diff_barrier;
+ /** Number of the audio format as announced by para_server. */
+ int current_audio_format_num;
+ /* The status task btrn is the child of the client task. */
+ struct btr_node *btrn;
};
+/** The array of status items sent by para_server. */
+char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
-/** 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**);
- int (*line_handler)(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;
-};
-static int com_grab(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 struct audiod_command cmds[] = {
-{
-.name = "cycle",
-.handler = com_cycle,
-.description = "switch to next mode",
-.synopsis = "cycle",
-.help =
-
-"on -> standby -> off -> on\n"
-
-},
-{
-.name = "grab",
-.line_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"
-
-},
-{
-.name = "sb",
-.handler = com_sb,
-.description = "enter standby mode",
-.synopsis = "sb",
-.help =
+/**
+ * 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;
-"Stop all decoders but leave connection to para_server open.\n"
+/**
+ * the gengetopt args_info struct that holds information on all command line
+ * arguments
+ */
+struct audiod_args_info conf;
-},
-{
-.name = "stat",
-.handler = com_stat,
-.description = "print status information",
-.synopsis = "stat [item1 ...]",
-.help =
+static char *socket_name;
+static struct audio_format_info afi[NUM_AUDIO_FORMATS];
-"Dump given status items (all if none given) to stdout.\n"
+static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
-},
-{
-.name = "term",
-.handler = com_term,
-.description = "terminate audiod",
-.synopsis = "term",
-.help =
+static struct status_task status_task_struct;
-"Stop all decoders, shut down connection to para_server and exit.\n"
+/**
+ * the task that calls the status command of para_server
+ *
+ * \sa struct status_task
+ */
+static struct status_task *stat_task = &status_task_struct;
-},
-{
-.name = NULL,
-}
+/**
+ * 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;
};
-/** 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
- * \param name the name of the audio format
+ * Get the audio format number.
+ *
+ * \param name The name of the audio format.
*
* \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
* \a name is not a supported audio format.
*/
-int get_audio_format_num(char *name)
+static int get_audio_format_num(const char *name)
{
int i;
+
+ while (para_isspace(*name))
+ name++;
FOR_EACH_AUDIO_FORMAT(i)
if (!strcmp(name, audio_formats[i]))
return i;
return -E_UNSUPPORTED_AUDIO_FORMAT;
}
-/*
- * log function. first argument is loglevel.
- */
-void para_log(int ll, const char* fmt,...)
+static int get_matching_audio_format_nums(const char *re)
{
- va_list argp;
- FILE *outfd;
- struct tm *tm;
- time_t t1;
- char str[MAXLINE] = "";
-
- if (ll < conf.loglevel_arg)
- return;
- outfd = logfile? logfile : stderr;
- time(&t1);
- tm = localtime(&t1);
- strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
- fprintf(outfd, "%s %s ", str, hostname);
- if (conf.loglevel_arg <= INFO)
- fprintf(outfd, "%i ", ll);
- va_start(argp, fmt);
- vfprintf(outfd, fmt, argp);
- va_end(argp);
-}
+ int i, ret;
+ regex_t preg;
-static int client_write(int fd, const char *buf)
-{
- size_t len = strlen(buf);
- return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
+ ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
+ if (ret < 0)
+ return ret;
+ ret = 0;
+ FOR_EACH_AUDIO_FORMAT(i)
+ if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
+ ret |= (1 << i);
+ regfree(&preg);
+ return ret;
}
-static char *get_time_string(struct timeval *newest_stime)
-{
- struct timeval now, diff, adj_stream_start, tmp;
- int total = 0, use_server_time = 1;
+/**
+ * Compute the play time based on information of the given slot.
+ *
+ * \param slot_num The slot number (negative means: no slot).
+ *
+ * This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
+ * from the status items received from para_server and the start time of the
+ * (first) writer of the given slot.
+ *
+ * It has to to take into account that probably the stream was not started at
+ * the beginning of the file, that the clock between the server and the client
+ * host may differ and that playback of the stream was delayed, e.g. because
+ * the prebuffer filter is used in the filter configuration of the given slot.
+ *
+ * If no writer is active in the given slot, or \a slot_num is negative
+ * (indicating that para_audiod runs in standby mode), an approximation based
+ * only on the status items is computed and the returned string is prefixed
+ * with "~".
+ *
+ * \return A string that must be freed by the caller.
+ */
+char *get_time_string(int slot_num)
+{
+ int ret, seconds = 0, length;
+ struct timeval *tmp, sum, sss, /* server stream start */
+ rstime, /* receiver start time */
+ wstime, /* writer start time */
+ wtime, /* now - writer start */
+ rskip; /* receiver start - sss */
+ struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
+ char *msg;
- if (!playing) {
- if (length_seconds)
+ if (audiod_status == AUDIOD_OFF)
+ goto empty;
+ if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
+ if (stat_task->length_seconds) /* paused */
return NULL;
- return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
+ goto empty; /* stopped */
}
- 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;
+ if (audiod_status == AUDIOD_ON && !s)
+ goto empty;
+ /*
+ * Valid status items and playing, set length and tmp to the stream
+ * start. We use the slot info and fall back to the info from current
+ * status items if no slot info is available.
+ */
+ length = stat_task->length_seconds;
+ tmp = &stat_task->server_stream_start;
+ if (s && s->wns && s->wns[0].btrn) { /* writer active in this slot */
+ btr_get_node_start(s->wns[0].btrn, &wstime);
+ if (wstime.tv_sec != 0) { /* writer wrote something */
+ if (s->server_stream_start.tv_sec == 0) {
+ /* copy status info to slot */
+ s->server_stream_start = stat_task->server_stream_start;
+ s->offset_seconds = stat_task->offset_seconds;
+ s->seconds_total = stat_task->length_seconds;
+ }
+ length = s->seconds_total;
+ tmp = &s->server_stream_start;
}
}
- 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;
+ if (stat_task->sa_time_diff_sign > 0)
+ tv_diff(tmp, &stat_task->sa_time_diff, &sss);
+ else
+ tv_add(tmp, &stat_task->sa_time_diff, &sss);
+ if (!s || !s->wns || !s->wns[0].btrn) {
+ struct timeval diff;
+ tv_diff(now, &sss, &diff);
+ seconds = diff.tv_sec + stat_task->offset_seconds;
+ goto out;
+ }
+ tv_diff(now, &wstime, &wtime);
+ //PARA_CRIT_LOG("offset %d\n", s->offset_seconds);
+ seconds = s->offset_seconds;
+ if (s->receiver_node->btrn) {
+ btr_get_node_start(s->receiver_node->btrn, &rstime);
+ ret = tv_diff(&rstime, &sss, &rskip);
+ if (ret > 0) { /* audiod was started in the middle of the stream */
+ tv_add(&wtime, &rskip, &sum);
+ seconds += sum.tv_sec;
+ } else
+ seconds += wtime.tv_sec;
+ } else
+ seconds += wtime.tv_sec;
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
+ seconds = PARA_MIN(seconds, length);
+ seconds = PARA_MAX(seconds, 0);
+ msg = make_message(
+ "%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
+ s? "" : "~",
+ seconds / 60,
+ seconds % 60,
+ (length - seconds) / 60,
+ (length - seconds) % 60,
+ length? (seconds * 100 + length / 2) / length : 0,
+ length / 60,
+ length % 60
);
+ //PARA_DEBUG_LOG("slot %d: %s\n", slot_num, msg);
+ return msg;
+empty:
+ return para_strdup(NULL);
}
-__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)
+static int want_colors(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;
- decoder_flags[i] = flag;
- }
- decoder_flags[MAX_STREAM_SLOTS] = '\0';
- return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
- decoder_flags);
+ if (conf.color_arg == color_arg_no)
+ return 0;
+ if (conf.color_arg == color_arg_yes)
+ return 1;
+ if (conf.logfile_given)
+ return 0;
+ return isatty(STDERR_FILENO);
}
-static char *configfile_exists(void)
+static void parse_config_or_die(void)
{
- static char *config_file;
-
- if (!config_file) {
+ int ret;
+ char *config_file;
+ struct audiod_cmdline_parser_params params = {
+ .override = 0,
+ .initialize = 0,
+ .check_required = 1,
+ .check_ambiguity = 0,
+ .print_errors = 1
+ };
+
+ if (conf.config_file_given)
+ config_file = para_strdup(conf.config_file_arg);
+ else {
char *home = para_homedir();
config_file = make_message("%s/.paraslash/audiod.conf", home);
free(home);
}
- return file_exists(config_file)? config_file : NULL;
+ ret = file_exists(config_file);
+ if (conf.config_file_given && !ret) {
+ PARA_EMERG_LOG("can not read config file %s\n", config_file);
+ goto err;
+ }
+ if (ret)
+ audiod_cmdline_parser_config_file(config_file, &conf, ¶ms);
+ free(config_file);
+ daemon_set_loglevel(conf.loglevel_arg);
+ return;
+err:
+ free(config_file);
+ exit(EXIT_FAILURE);
}
static void setup_signal_handling(void)
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;
+ para_sigaction(SIGPIPE, SIG_IGN);
}
static void clear_slot(int slot_num)
s->format = -1;
}
-static void kill_stream_writer(int slot_num)
+static void close_receiver(int slot_num)
{
struct slot_info *s = &slot[slot_num];
+ struct audio_format_info *a;
- if (s->format < 0 || s->wkilled || s->wpid <= 0)
+ if (s->format < 0 || !s->receiver_node)
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;
+ a = &afi[s->format];
+ PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
+ audio_formats[s->format], slot_num);
+ a->receiver->close(s->receiver_node);
+ btr_remove_node(&s->receiver_node->btrn);
+ free(s->receiver_node);
+ s->receiver_node = NULL;
+ tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
+ &a->restart_barrier);
}
-static void set_restart_barrier(int format, struct timeval *now)
+static void writer_cleanup(struct writer_node *wn)
{
- struct timeval tmp;
+ struct writer *w;
- if (now)
- tmp = *now;
- else
- gettimeofday(&tmp, NULL);
- tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
+ if (!wn)
+ return;
+ w = writers + wn->writer_num;
+ PARA_INFO_LOG("closing %s\n", writer_names[wn->writer_num]);
+ w->close(wn);
+ btr_remove_node(&wn->btrn);
}
-static void close_receiver(int slot_num)
+static void close_writers(struct slot_info *s)
{
- struct slot_info *s = &slot[slot_num];
struct audio_format_info *a;
+ int i;
- if (s->format < 0 || !s->receiver_node)
+ if (s->format < 0)
return;
- a = &afi[s->format];
- PARA_NOTICE_LOG("closing %s recevier 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);
+ assert(s->wns);
+ a = afi + s->format;
+ if (a->num_writers == 0)
+ writer_cleanup(s->wns);
+ else {
+ for (i = 0; i < a->num_writers; i++)
+ writer_cleanup(s->wns + i);
+ }
+ free(s->wns);
+ s->wns = NULL;
}
-static void kill_all_decoders(void)
+static void close_filters(struct slot_info *s)
{
int i;
+ struct audio_format_info *a = afi + s->format;
+ if (a->num_filters == 0)
+ return;
+ for (i = 0; i < a->num_filters; i++) {
+ struct filter_node *fn = s->fns + i;
+ struct filter *f;
- FOR_EACH_SLOT(i)
- if (slot[i].format >= 0) {
- PARA_INFO_LOG("stopping decoder in slot %d\n", i);
- kill_stream_writer(i);
- }
+ if (!fn)
+ continue;
+ f = filters + fn->filter_num;
+ if (f->close)
+ f->close(fn);
+ btr_remove_node(&fn->btrn);
+ }
+ free(s->fns);
+ s->fns = NULL;
+}
+
+/*
+ * Whenever a task commits suicide by returning from post_select with t->error
+ * < 0, it also removes its btr node. We do exactly that to kill a running
+ * task. Note that the scheduler checks t->error also _before_ each pre/post
+ * select call, so the victim will never be scheduled again.
+ */
+static void kill_btrn(struct btr_node **btrnp, struct task *t, int error)
+{
+ if (t->error < 0)
+ return;
+ t->error = error;
+ btr_remove_node(btrnp);
}
-static void check_sigchld(void)
+static void kill_all_decoders(int error)
{
- 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;
+ struct slot_info *s = slot + i;
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->receiver_node)
+ continue;
+ kill_btrn(&s->receiver_node->btrn, &s->receiver_node->task,
+ error);
}
- 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->fc)
+ if (s->wns || s->receiver_node || s->fns)
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_task->fd < 0)
- return;
- PARA_NOTICE_LOG("%s", "closing status pipe\n");
- close(stat_task->fd);
- del_close_on_fork_list(stat_task->fd);
- stat_task->fd = -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_task->fd >= 0)
- close_stat_pipe();
- exit(status);
-}
-
-__malloc static char *glob_cmd(char *cmd)
-{
- 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",
- (long unsigned)tmp.tv_sec,
- (long unsigned)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);
-out:
- return ret;
-}
-
-/** get the number of filters for the given audio format */
-int num_filters(int audio_format_num)
-{
- return afi[audio_format_num].num_filters;
-}
-
-void filter_event_handler(struct task *t)
-{
- PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
- unregister_task(t);
-}
-
-static void open_filters(int slot_num)
+static void open_filters(struct slot_info *s)
{
- struct slot_info *s = &slot[slot_num];
- struct audio_format_info *a = &afi[s->format];
+ struct audio_format_info *a = afi + s->format;
+ struct filter_node *fn;
int nf = a->num_filters;
+ struct btr_node *parent;
int i;
- static int output_eof; /* FIXME */
- s->fc = para_calloc(sizeof(struct filter_chain));
- INIT_LIST_HEAD(&s->fc->filters);
- if (!nf)
+ if (nf == 0)
return;
- 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->output_eof = &output_eof;
- output_eof = 0;
-
- 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->task.flags = 0;
- s->fc->eof = 0;
- sprintf(s->fc->task.status, "filter chain");
+ PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
+ assert(s->fns == NULL);
+ s->fns = para_calloc(nf * sizeof(struct filter_node));
+ parent = s->receiver_node->btrn;
for (i = 0; i < nf; i++) {
- struct filter_node *fn = para_calloc(sizeof(struct filter_node));
+ struct filter *f = filters + a->filter_nums[i];
+ fn = s->fns + i;
+ fn->filter_num = a->filter_nums[i];
fn->conf = a->filter_conf[i];
- fn->fc = s->fc;
- fn->filter = a->filters[i];
- INIT_LIST_HEAD(&fn->callbacks);
- 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->fc->outbuf = fn->buf;
- 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);
-}
+ fn->task.pre_select = f->pre_select;
+ fn->task.post_select = f->post_select;
-static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
-{
- struct filter_node *fn;
- int i, j;
+ fn->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = f->name, .parent = parent,
+ .handler = f->execute, .context = fn));
- FOR_EACH_SLOT(i) {
- struct slot_info *s = &slot[i];
- if (s->format < 0 || !s->fc)
- 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->fc->filters, node)
- if (filternum <= 0 || j++ == filternum)
- break;
- return fn;
+ f->open(fn);
+ register_task(&sched, &fn->task);
+ parent = fn->btrn;
+ PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
+ audio_formats[s->format], i, nf, f->name, (int)(s - slot));
+ sprintf(fn->task.status, "%s (slot %d)", f->name, (int)(s - slot));
}
- return NULL;
}
-static void start_stream_writer(int slot_num)
+static void open_writers(struct slot_info *s)
{
- int ret, fds[3] = {1, -1, -1};
- 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_write -w alsa");
- PARA_INFO_LOG("starting stream writer: %s\n", glob);
- open_filters(slot_num);
- ret = para_exec_cmdline_pid(&s->wpid, glob, fds);
- free(glob);
- if (ret < 0) {
- PARA_ERROR_LOG("exec failed (%d)\n", ret);
- return;
+ int i;
+ struct audio_format_info *a = afi + s->format;
+ struct writer_node *wn;
+ struct btr_node *parent = s->fns[a->num_filters - 1].btrn;
+
+ assert(s->wns == NULL);
+ s->wns = para_calloc(PARA_MAX(1U, a->num_writers)
+ * sizeof(struct writer_node));
+ PARA_INFO_LOG("opening %s writers\n", audio_formats[s->format]);
+ for (i = 0; i < a->num_writers; i++) {
+ wn = s->wns + i;
+ wn->conf = a->writer_conf[i];
+ wn->writer_num = a->writer_nums[i];
+ register_writer_node(wn, parent, &sched);
}
- 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->fc->filters);
}
-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)
+/* returns slot num on success */
+static int open_receiver(int format)
{
struct audio_format_info *a = &afi[format];
struct slot_info *s;
int ret, slot_num;
+ struct receiver *r = a->receiver;
struct receiver_node *rn;
- slot_num = get_empty_slot();
- if (slot_num < 0)
- 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;
+ tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
+ ret = get_empty_slot();
+ if (ret < 0)
+ return ret;
+ slot_num = ret;
+ rn = para_calloc(sizeof(*rn));
+ rn->receiver = r;
rn->conf = a->receiver_conf;
- ret = a->receiver->open(s->receiver_node);
+ rn->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = r->name, .context = rn));
+ ret = r->open(rn);
if (ret < 0) {
- PARA_ERROR_LOG("failed to open receiver (%s)\n",
- PARA_STRERROR(-ret));
- free(s->receiver_node);
- s->receiver_node = NULL;
- return;
+ btr_remove_node(&rn->btrn);
+ free(rn);
+ return ret;
}
+ s = &slot[slot_num];
+ s->format = format;
+ s->receiver_node = rn;
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;
- rn->task.flags = 0;
- sprintf(rn->task.status, "receiver node");
- register_task(&rn->task);
+ audio_formats[format], r->name, slot_num);
+ rn->task.pre_select = r->pre_select;
+ rn->task.post_select = r->post_select;
+ sprintf(rn->task.status, "%s receiver node", r->name);
+ register_task(&sched, &rn->task);
+ return slot_num;
}
-static int is_frozen(int format)
+static bool receiver_running(void)
{
- struct timeval now;
- struct audio_format_info *a = &afi[format];
+ int i;
+ long unsigned ss1 = stat_task->server_stream_start.tv_sec;
+
+ FOR_EACH_SLOT(i) {
+ struct slot_info *s = &slot[i];
+ long unsigned ss2 = s->server_stream_start.tv_sec;
- gettimeofday(&now, NULL);
- return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
+ if (!s->receiver_node)
+ continue;
+ if (s->receiver_node->task.error >= 0)
+ return true;
+ if (ss1 == ss2)
+ return true;
+ }
+ return false;
}
-static void start_current_receiver(void)
+/**
+ * Return the root node of the current buffer tree.
+ *
+ * This is only used for stream grabbing.
+ *
+ * \return \p NULL if no slot is currently active. If more than one buffer tree
+ * exists, the node corresponding to the most recently started receiver is
+ * returned.
+ */
+struct btr_node *audiod_get_btr_root(void)
{
- int i;
+ int i, newest_slot = -1;
+ struct timeval newest_rstime = {0, 0};
- if (!af_status)
- return;
- i = get_audio_format_num(af_status);
- if (i < 0)
- return;
- if ((decoder_running(i) & 1) || is_frozen(i))
- return;
- open_receiver(i);
+ FOR_EACH_SLOT(i) {
+ struct slot_info *s = &slot[i];
+ struct timeval rstime;
+ if (!s->receiver_node)
+ continue;
+ if (s->receiver_node->task.error < 0)
+ continue;
+ btr_get_node_start(s->receiver_node->btrn, &rstime);
+ if (newest_slot >= 0 && tv_diff(&rstime, &newest_rstime, NULL) < 0)
+ continue;
+ newest_rstime = rstime;
+ newest_slot = i;
+ }
+ if (newest_slot == -1)
+ return NULL;
+ return slot[newest_slot].receiver_node->btrn;
}
-static void compute_time_diff(const struct timeval *status_time)
+/* whether a new instance of a decoder should be started. */
+static bool must_start_decoder(void)
{
- struct timeval now, tmp, diff;
- static int count;
- int sign;
+ int cafn = stat_task->current_audio_format_num;
+ unsigned vs = stat_task->vss_status;
+
+ if (audiod_status != AUDIOD_ON)
+ return false;
+ if (cafn < 0)
+ return false;
+ if (!stat_task->ct)
+ return false;
+ if (vs & VSS_STATUS_FLAG_NEXT)
+ return false;
+ if (!(vs & VSS_STATUS_FLAG_PLAYING))
+ return false;
+ if (receiver_running())
+ return false;
+ if (tv_diff(now, &afi[cafn].restart_barrier, NULL) < 0)
+ return false;
+ return true;
+}
+
+static unsigned compute_time_diff(const struct timeval *status_time)
+{
+ 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? "+" : "-",
+ sign < 0? "-" : "+",
tv2ms(&diff),
- sa_time_diff_sign ? "+" : "-",
- tv2ms(&sa_time_diff)
+ sa_time_diff_sign < 0? "-" : "+",
+ 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)
+static int update_item(int itemnum, char *buf)
{
- int itemnum;
- size_t ilen = 0;
long unsigned sec, usec;
- char *tmp;
-// PARA_INFO_LOG("line: %s\n", line);
- if (!line)
- return;
- itemnum = stat_line_valid(line);
- if (itemnum < 0) {
- PARA_WARNING_LOG("invalid status line: %s\n", line);
- return;
- }
- tmp = make_message("%s\n", line);
- stat_client_write(tmp, itemnum);
- free(tmp);
+ if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
+ return 1;
free(stat_item_values[itemnum]);
- stat_item_values[itemnum] = para_strdup(line);
- ilen = strlen(status_item_list[itemnum]);
+ stat_item_values[itemnum] = para_strdup(buf);
+ stat_client_write_item(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);
+ case SI_STATUS_FLAGS:
+ stat_task->vss_status = 0;
+ if (strchr(buf, 'N'))
+ stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
+ if (strchr(buf, 'P'))
+ stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
break;
case SI_OFFSET:
- offset_seconds = atoi(line + ilen + 1);
+ stat_task->offset_seconds = atoi(buf);
break;
- case SI_LENGTH:
- length_seconds = atoi(line + ilen + 1);
+ case SI_SECONDS_TOTAL:
+ stat_task->length_seconds = atoi(buf);
break;
case SI_STREAM_START:
- if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
- server_stream_start.tv_sec = sec;
- server_stream_start.tv_usec = usec;
+ if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
+ stat_task->server_stream_start.tv_sec = sec;
+ stat_task->server_stream_start.tv_usec = usec;
}
break;
case SI_CURRENT_TIME:
- if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
+ if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
struct timeval tv = {sec, usec};
compute_time_diff(&tv);
}
break;
+ case SI_FORMAT:
+ stat_task->current_audio_format_num
+ = get_audio_format_num(buf);
}
-}
-
-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);
- s->receiver_node->eof = 1;
- }
- /* 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);
- kill_stream_writer(slot_num);
- }
- }
-}
-
-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->fc)
- loaded = *s->fc->out_loaded;
- } else {
- if (rn)
- loaded = rn->loaded;
- }
-out:
- return loaded;
-}
-
-static void close_writer(int slot_num)
-{
- struct slot_info *s = &slot[slot_num];
- 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->fc)
- *s->fc->output_eof = 1; /* FIXME */
-}
-
-
-static void close_decoder_if_idle(int slot_num)
-{
- struct slot_info *s = &slot[slot_num];
- struct receiver_node *rn = s->receiver_node;
-
- if (s->format < 0)
- return;
- if (!s->fc)
- return;
- if (!rn->eof && !s->fc->eof && s->wpid > 0)
- return;
- if (!s->fc->eof && s->wpid > 0 && get_loaded_bytes(slot_num))
- return;
- close_writer(slot_num);
- 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->fc);
- close_filters(s->fc);
- free(s->fc);
- close_receiver(slot_num);
- clear_slot(slot_num);
-}
-
-static void audiod_pre_select(struct sched *s, struct task *t)
-{
- int i;
-
- if (audiod_status != AUDIOD_ON)
- kill_all_decoders();
- else if (playing)
- start_current_receiver();
- check_timeouts();
- FOR_EACH_SLOT(i) {
- struct audio_format_info *a;
- struct receiver_node *rn;
-
- close_decoder_if_idle(i);
- slot[i].wcheck = 0;
- if (slot[i].format < 0)
- continue;
- a = &afi[slot[i].format];
- rn = slot[i].receiver_node;
- if (rn && rn->loaded && !slot[i].wpid) {
- PARA_INFO_LOG("no writer in slot %d\n", i);
- start_stream_writer(i);
- }
- if (slot[i].write_fd <= 0)
- continue;
- if (!get_loaded_bytes(i))
- continue;
- para_fd_set(slot[i].write_fd, &s->wfds, &s->max_fileno);
- slot[i].wcheck = 1;
- }
-}
-
-static int write_audio_data(int slot_num)
-{
- struct slot_info *s = &slot[slot_num];
- struct audio_format_info *a = &afi[s->format];
- struct receiver_node *rn = s->receiver_node;
- int ret;
- char **buf;
- size_t *len;
-
- if (a->num_filters) {
- buf = &s->fc->outbuf;
- len = s->fc->out_loaded;
- } else {
- buf = &rn->buf;
- len = &rn->loaded;
- }
- PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
- ret = write(s->write_fd, *buf, *len);
- PARA_DEBUG_LOG("wrote %d/%zd\n", ret, *len);
- if (ret < 0) {
- PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
- slot_num, s->write_fd, strerror(errno));
- *len = 0;
- close_writer(slot_num);
-// s->fc->error = E_WRITE_AUDIO_DATA;
- } else if (ret != *len) {
- PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
- audio_formats[s->format], ret, *len, slot_num);
- *len -= ret;
- memmove(*buf, *buf + ret, *len);
- } else
- *len = 0;
- if (ret > 0)
- gettimeofday(&s->wtime, NULL);
- return ret;
-}
-
-static void audiod_post_select(struct sched *s, struct task *t)
-{
- int ret, i;
-
- FOR_EACH_SLOT(i) {
- struct receiver_node *rn = slot[i].receiver_node;
-
- if (rn && rn->loaded)
- slot[i].rtime = s->now;
- if (slot[i].write_fd <= 0 || !slot[i].wcheck
- || !FD_ISSET(slot[i].write_fd, &s->wfds))
- continue;
- ret = write_audio_data(i);
- }
-}
-
-static void init_audiod_task(struct audiod_task *at)
-{
- 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");
+ return 1;
}
static int parse_stream_command(const char *txt, char **cmd)
{
- char *p = strchr(txt, ':');
- int i;
+ int ret, len;
+ char *re, *p = strchr(txt, ':');
if (!p)
return -E_MISSING_COLON;
- p++;
- FOR_EACH_AUDIO_FORMAT(i) {
- if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
- continue;
- *cmd = p;
- return i;
- }
- return -E_UNSUPPORTED_AUDIO_FORMAT;
+ *cmd = p + 1;
+ len = p - txt;
+ re = malloc(len + 1);
+ strncpy(re, txt, len);
+ re[len] = '\0';
+ ret = get_matching_audio_format_nums(re);
+ free(re);
+ return ret;
}
static int add_filter(int format, char *cmdline)
{
struct audio_format_info *a = &afi[format];
int filter_num, nf = a->num_filters;
+ void *cfg;
- filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
+ filter_num = check_filter_arg(cmdline, &cfg);
if (filter_num < 0)
return filter_num;
- a->filters[nf] = &filters[filter_num];
+ a->filter_conf = para_realloc(a->filter_conf,
+ (nf + 1) * sizeof(void *));
+ a->filter_nums = para_realloc(a->filter_nums,
+ (nf + 1) * sizeof(unsigned));
+ a->filter_nums[nf] = filter_num;
+ a->filter_conf[nf] = cfg;
a->num_filters++;
- PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
- a->filters[nf]->name);
+ PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
+ filters[filter_num].name);
return filter_num;
}
-static int setup_default_filters(void)
+static int parse_writer_args(void)
{
- int i, ret = 1;
+ int i, ret;
+ char *cmd;
+ struct audio_format_info *a;
- 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");
+ for (i = 0; i < conf.writer_given; i++) {
+ void *wconf;
+ int j, nw, writer_num, af_mask;
+
+ ret = parse_stream_command(conf.writer_arg[i], &cmd);
if (ret < 0)
- goto out;
- PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
+ return ret;
+ af_mask = ret;
+ FOR_EACH_AUDIO_FORMAT(j) {
+ a = afi + j;
+ if ((af_mask & (1 << j)) == 0) /* no match */
+ continue;
+ wconf = check_writer_arg_or_die(cmd, &writer_num);
+ nw = a->num_writers;
+ a->writer_nums = para_realloc(a->writer_nums, (nw + 1) * sizeof(int));
+ a->writer_conf = para_realloc(a->writer_conf, (nw + 1) * sizeof(void *));
+ a->writer_nums[nw] = writer_num;
+ a->writer_conf[nw] = wconf;
+ PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[j],
+ nw, writer_names[writer_num]);
+ a->num_writers++;
+ }
}
-out:
- return ret;
+ /* Use default writer for audio formats which are not yet set up. */
+ FOR_EACH_AUDIO_FORMAT(i) {
+ struct writer *w = writers + DEFAULT_WRITER;
+ a = afi + i;
+ if (a->num_writers > 0)
+ continue; /* already set up */
+ PARA_INFO_LOG("%s writer: %s (default)\n", audio_formats[i],
+ writer_names[DEFAULT_WRITER]);
+ a->writer_nums = para_malloc(sizeof(int));
+ a->writer_nums[0] = DEFAULT_WRITER;
+ a->writer_conf = para_malloc(sizeof(void *));
+ a->writer_conf[0] = w->parse_config_or_die("");
+ a->num_writers = 1;
+ }
+ return 1;
}
-static int init_stream_io(void)
+static int parse_receiver_args(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++) {
- char *arg = conf.receiver_arg[i];
- char *recv = strchr(arg, ':');
- ret = -E_MISSING_COLON;
- if (!recv)
- goto out;
- *recv = '\0';
- recv++;
- ret = get_audio_format_num(arg);
+ for (i = conf.receiver_given - 1; i >= 0; i--) {
+ char *arg;
+ int j, af_mask;
+
+ ret = parse_stream_command(conf.receiver_arg[i], &arg);
if (ret < 0)
goto out;
- afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
- if (!afi[ret].receiver_conf) {
+ af_mask = ret;
+ FOR_EACH_AUDIO_FORMAT(j) {
+ a = afi + j;
+ if ((af_mask & (1 << j)) == 0) /* no match */
+ continue;
+ /*
+ * If multiple receivers are given for this audio format, the
+ * last one wins and we have to free the previous receiver
+ * config here. Since we are iterating backwards, the winning
+ * receiver arg is in fact the first one given.
+ */
+ if (a->receiver_conf)
+ a->receiver->free_config(a->receiver_conf);
+ a->receiver_conf = check_receiver_arg(arg, &receiver_num);
ret = -E_RECV_SYNTAX;
- goto out;
+ if (!a->receiver_conf)
+ goto out;
+ a->receiver = receivers + receiver_num;
}
- afi[ret].receiver = &receivers[receiver_num];
}
- /* use the first available receiver with no arguments
- * for those audio formats for which no receiver
- * was specified
+ /*
+ * Use the first available receiver with no arguments for those audio
+ * formats for which no receiver was specified.
*/
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];
}
- free(cmd);
- /* filters */
- filter_init(filters);
- nf = PARA_MAX(2, conf.filter_given) + 1;
- PARA_INFO_LOG("allocating space for %d filters\n", nf);
FOR_EACH_AUDIO_FORMAT(i) {
- afi[i].filter_conf = para_malloc(nf * sizeof(char *));
- afi[i].filters = para_malloc(nf * sizeof(struct filter *));
- }
- if (!conf.no_default_filters_given)
- return setup_default_filters();
- for (i = 0; i < conf.filter_given; i++) {
- char *arg = conf.filter_arg[i];
- char *filter_name = strchr(arg, ':');
- ret = -E_MISSING_COLON;
- if (!filter_name)
- goto out;
- *filter_name = '\0';
- filter_name++;
- ret = get_audio_format_num(arg);
- if (ret < 0)
- goto out;
- ret = add_filter(ret, filter_name);
- if (ret < 0)
- goto out;
+ a = afi + i;
+ PARA_INFO_LOG("receiving %s streams via %s receiver\n",
+ audio_formats[i], a->receiver->name);
}
ret = 1;
out:
+ free(cmd);
return ret;
}
-static int dump_commands(int fd)
-{
- char *buf = para_strdup(""), *tmp = NULL;
- int i;
- ssize_t 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;
-}
-
-/*
- * 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 init_default_filters(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;
-}
+ int i, ret = 1;
-static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
-{
- int i, ret;
- char *buf = NULL;
- long unsigned mask = ~0LU;
+ FOR_EACH_AUDIO_FORMAT(i) {
+ struct audio_format_info *a = &afi[i];
+ char *tmp;
+ int j;
- 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 (a->num_filters)
+ continue; /* no default -- nothing to to */
+ /*
+ * udp and dccp streams are fec-encoded, so add fecdec as the
+ * first filter.
+ */
+ if (strcmp(afi[i].receiver->name, "udp") == 0 ||
+ strcmp(afi[i].receiver->name, "dccp") == 0) {
+ tmp = para_strdup("fecdec");
+ add_filter(i, tmp);
+ free(tmp);
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;
+ /* 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);
- }
- if (mask & (1 << SI_AUDIOD_STATUS)) {
- char *s = audiod_status_string();
- ret = client_write(fd, s);
- if (ret < 0)
+ ret = -E_UNSUPPORTED_FILTER;
+ if (!filters[j].name)
goto out;
- free(s);
- }
- if (mask & (1 << SI_DECODER_FLAGS)) {
- char *df =decoder_flags();
- ret = client_write(fd, df);
+ tmp = para_strdup(filters[j].name);
+ ret = add_filter(i, tmp);
+ free(tmp);
if (ret < 0)
goto out;
- free(df);
- }
-
- 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;
+ PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
+ filters[j].name);
}
- ret = client_write(fd, buf);
out:
- if (ret > 0)
- ret = stat_client_add(fd, mask);
- free(buf);
return ret;
}
-#if 0
-static char *list_filters(void)
+static int parse_filter_args(void)
{
- int i, j;
- char *tmp, *msg = make_message("format\tnum\tcmd\n");
-
- 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);
- }
- return msg;
-}
-#endif
+ int i, j, ret, af_mask;
-
-static int com_grab(int fd, char *cmdline)
-{
- struct grab_client *gc;
- struct filter_node *fn;
- int i, err;
- char *msg;
-
- gc = grab_client_new(fd, cmdline, &err);
- 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;
+ for (i = 0; i < conf.filter_given; i++) {
+ char *arg;
+ ret = parse_stream_command(conf.filter_arg[i], &arg);
+ if (ret < 0)
+ goto out;
+ af_mask = ret;
+ FOR_EACH_AUDIO_FORMAT(j) {
+ if ((af_mask & (1 << j)) == 0) /* no match */
+ continue;
+ ret = add_filter(j, arg);
+ if (ret < 0)
+ goto out;
}
- } 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;
-}
-
-static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
-{
- close(fd);
- clean_exit(EXIT_SUCCESS, "terminating on user request");
-}
-
-static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
-{
- audiod_status = AUDIOD_ON;
- close(fd);
- return 1;
-}
-
-static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
-{
- audiod_status = AUDIOD_OFF;
- close(fd);
- return 1;
-}
-
-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)
-{
- 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;
-}
-
-static int check_perms(uid_t uid)
-{
- 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;
+ ret = init_default_filters(); /* use default values for the rest */
+out:
+ return ret;
}
-static int handle_connect(void)
+static int parse_stream_args(void)
{
- int i, argc, ret, clifd = -1;
- char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
- struct sockaddr_un unix_addr;
+ int ret;
- ret = para_accept(cmd_task->fd, &unix_addr, sizeof(struct sockaddr_un));
+ ret = parse_receiver_args();
if (ret < 0)
- goto out;
- clifd = ret;
- ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
+ return ret;
+ ret = parse_filter_args();
if (ret < 0)
- goto out;
- PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
- ret = check_perms(ret);
+ return ret;
+ ret = parse_writer_args();
if (ret < 0)
- goto out;
- ret = -E_INVALID_AUDIOD_CMD;
- cmd = para_strdup(buf);
- p = strchr(cmd, '\n');
- if (!p)
- p = "";
- else {
- *p = '\0';
- p++;
- }
- for (i = 0; cmds[i].name; i++) {
- int j;
- if (strcmp(cmds[i].name, cmd))
- continue;
- if (cmds[i].handler) {
- argc = split_args(buf, &argv, "\n");
- PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
- ret = cmds[i].handler(clifd, argc, argv);
- goto out;
- }
- for (j = 0; p[j]; j++)
- if (p[j] == '\n')
- p[j] = ' ';
- PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
- ret = cmds[i].line_handler(clifd, p);
- goto out;
- }
- ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
-out:
- free(cmd);
- 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);
- }
- return ret;
+ return ret;
+ return 1;
}
-static void audiod_get_socket(void)
+/* does not unlink socket on errors */
+static int audiod_get_socket(void)
{
struct sockaddr_un unix_addr;
+ int ret, 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,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
- if (cmd_task->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) {
- PARA_EMERG_LOG("%s", "can not listen on socket\n");
- exit(EXIT_FAILURE); /* do not unlink socket */
+ ret = create_local_socket(socket_name, &unix_addr,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
+ if (ret < 0)
+ goto err;
+ fd = ret;
+ if (listen(fd , 5) < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ goto err;
}
- add_close_on_fork_list(cmd_task->fd);
-}
-
-static int open_stat_pipe(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;
-}
-
-void signal_event_handler(struct task *t)
-{
- struct signal_task *st = t->private_data;
- handle_signal(st->signum);
+ ret = mark_fd_nonblocking(fd);
+ if (ret < 0)
+ goto err;
+ return fd;
+err:
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+ exit(EXIT_FAILURE);
}
-void signal_pre_select(struct sched *s, struct task *t)
+static void signal_pre_select(struct sched *s, struct task *t)
{
- struct signal_task *st = t->private_data;
- t->ret = 1;
+ struct signal_task *st = container_of(t, struct signal_task, task);
para_fd_set(st->fd, &s->rfds, &s->max_fileno);
}
-void signal_post_select(struct sched *s, struct task *t)
+static void signal_post_select(struct sched *s, __a_unused struct task *t)
{
- 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();
+ int signum;
+
+ signum = para_next_signal(&s->rfds);
+ switch (signum) {
+ case SIGINT:
+ case SIGTERM:
+ case SIGHUP:
+ PARA_EMERG_LOG("terminating on signal %d\n", signum);
+ clean_exit(EXIT_FAILURE, "caught deadly signal");
+ }
}
-void signal_setup_default(struct signal_task *st)
+static void signal_setup_default(struct signal_task *st)
{
st->task.pre_select = signal_pre_select;
st->task.post_select = signal_post_select;
- st->task.private_data = st;
- st->task.flags = 0;
sprintf(st->task.status, "signal task");
}
static void command_pre_select(struct sched *s, struct task *t)
{
- struct command_task *ct = t->private_data;
+ struct command_task *ct = container_of(t, struct command_task, task);
para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
-
}
static void command_post_select(struct sched *s, struct task *t)
{
int ret;
- struct command_task *ct = t->private_data;
+ struct command_task *ct = container_of(t, struct command_task, task);
+ static struct timeval last_status_dump;
+ struct timeval tmp, delay = {0, 500 * 1000};
- if (audiod_status != AUDIOD_OFF)
+ tv_add(&last_status_dump, &delay, &tmp);
+ if (tv_diff(&tmp, now, NULL) < 0) {
audiod_status_dump();
- t->ret = 1; /* always successful */
- if (!FD_ISSET(ct->fd, &s->rfds))
- return;
- ret = handle_connect();
+ last_status_dump = *now;
+ }
+
+ ret = handle_connect(ct->fd, &s->rfds);
if (ret < 0)
- PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ audiod_status_dump();
}
-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.private_data = ct;
- ct->task.flags = 0;
+ ct->task.error = 0;
+ ct->fd = audiod_get_socket(); /* doesn't return on errors */
sprintf(ct->task.status, "command task");
}
-static void status_pre_select(struct sched *s, struct task *t)
+static void close_stat_pipe(void)
{
- struct status_task *st = t->private_data;
- t->ret = 1;
- if (st->fd >= 0 && audiod_status == AUDIOD_OFF)
- close_stat_pipe();
- if (st->fd < 0 && audiod_status != AUDIOD_OFF) {
- st->fd = open_stat_pipe();
- st->loaded = 0;
- st->buf[0] = '\0';
- }
- if (st->fd >= 0 && audiod_status != AUDIOD_OFF)
- para_fd_set(st->fd, &s->rfds, &s->max_fileno);
+ if (!stat_task->ct)
+ return;
+ client_close(stat_task->ct);
+ stat_task->ct = NULL;
+ clear_and_dump_items();
+ stat_task->length_seconds = 0;
+ stat_task->offset_seconds = 0;
+ stat_task->vss_status = 0;
+ stat_task->current_audio_format_num = -1;
+ audiod_status_dump();
}
-static void status_post_select(struct sched *s, struct task *t)
+/**
+ * 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 status_task *st = t->private_data;
- int ret;
-
- t->ret = 1;
- if (st->fd < 0 || !FD_ISSET(st->fd, &s->rfds))
- return;
- ret = read(st->fd, st->buf + st->loaded,
- STRINGSIZE - 1 - st->loaded);
- if (ret <= 0) {
- close_stat_pipe();
- /* avoid busy loop if server is down */
- while (sleep(1) > 0)
- ; /* try again*/
- } else {
- st->buf[ret + st->loaded] = '\0';
- st->loaded = for_each_line(st->buf, ret + st->loaded,
- &check_stat_line);
- }
+ PARA_EMERG_LOG("%s\n", msg);
+ if (socket_name)
+ unlink(socket_name);
+ close_stat_pipe();
+ exit(status);
}
-static void init_status_task(struct status_task *st)
+/* avoid busy loop if server is down */
+static void set_stat_task_restart_barrier(unsigned seconds)
{
- st->task.pre_select = status_pre_select;
- st->task.post_select = status_post_select;
- st->task.private_data = st;
- st->task.flags = 0;
- st->loaded = 0;
- st->fd = -1;
- st->buf[0] = '\0';
- sprintf(st->task.status, "status task");
+ struct timeval delay = {seconds, 0};
+ tv_add(now, &delay, &stat_task->restart_barrier);
}
+static void try_to_close_slot(int slot_num)
+{
+ struct slot_info *s = &slot[slot_num];
+ struct audio_format_info *a = afi + s->format;
+ int i;
+ if (s->format < 0)
+ return;
+ if (s->receiver_node && s->receiver_node->task.error >= 0)
+ return;
+ for (i = 0; i < a->num_filters; i++)
+ if (s->fns && s->fns[i].task.error >= 0)
+ return;
+ if (a->num_writers > 0) {
+ for (i = 0; i < a->num_writers; i++)
+ if (s->wns && s->wns[i].task.error >= 0)
+ return;
+ } else {
+ if (s->wns && s->wns[0].task.error >= 0)
+ return;
+ }
+ PARA_INFO_LOG("closing slot %d\n", slot_num);
+ close_writers(s);
+ close_filters(s);
+ close_receiver(slot_num);
+ clear_slot(slot_num);
+}
-#if 0
-/* TODO: move everything before the select call to pre_select() */
-static void __noreturn audiod_mainloop(void)
+/*
+ * Check if any receivers/filters/writers need to be started and do so if
+ * necessary.
+ */
+static void start_stop_decoders(void)
{
- fd_set rfds, wfds;
- int ret, max_fileno, sbo = 0;
- char status_buf[STRINGSIZE] = "";
- struct timeval tv;
+ int i, ret;
+ struct slot_info *sl;
+ struct audio_format_info *a;
+ FOR_EACH_SLOT(i)
+ try_to_close_slot(i);
+ if (audiod_status != AUDIOD_ON ||
+ !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
+ return kill_all_decoders(-E_NOT_PLAYING);
+ if (!must_start_decoder())
+ return;
+ ret = open_receiver(stat_task->current_audio_format_num);
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ return;
+ }
+ sl = slot + ret;
+ a = afi + sl->format;
+ if (a->num_filters)
+ open_filters(sl);
+ open_writers(sl);
+ activate_grab_clients(&sched);
+ btr_log_tree(sl->receiver_node->btrn, LL_NOTICE);
+}
+static void status_pre_select(struct sched *s, struct task *t)
+{
+ struct status_task *st = container_of(t, struct status_task, task);
+ int ret, cafn = stat_task->current_audio_format_num;
-repeat:
- FD_ZERO(&wfds);
- FD_ZERO(&rfds);
- max_fileno = -1;
- /* always check signal pipe and the local socket */
- para_fd_set(signal_pipe, &rfds, &max_fileno);
- para_fd_set(audiod_socket, &rfds, &max_fileno);
+ if (must_start_decoder())
+ goto min_delay;
+ ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
+ if (ret > 0)
+ goto min_delay;
+ if (st->ct && audiod_status == AUDIOD_OFF)
+ goto min_delay;
+ if (!st->ct && audiod_status != AUDIOD_OFF)
+ sched_request_barrier_or_min_delay(&st->restart_barrier, s);
+ if (cafn >= 0)
+ sched_request_barrier(&afi[cafn].restart_barrier, s);
+ /*
+ * If para_server is playing we'd like to have a smooth time display
+ * even if we are running in standby mode. So we request a timeout that
+ * expires at the next full second.
+ */
+ if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
+ sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
+ return;
+min_delay:
+ sched_min_delay(s);
+}
- if (audiod_status != AUDIOD_ON)
- kill_all_decoders();
- else if (playing)
- start_current_receiver();
+/* restart the client task if necessary */
+static void status_post_select(struct sched *s, struct task *t)
+{
+ struct status_task *st = container_of(t, struct status_task, task);
- set_stream_fds(&wfds, &max_fileno);
- /* status pipe */
- if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
+ if (audiod_status == AUDIOD_OFF) {
+ if (!st->ct)
+ goto out;
+ if (st->ct->task.error >= 0) {
+ kill_btrn(&st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
+ goto out;
+ }
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;
+ goto out;
}
- 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) {
+ if (st->ct) {
+ char *buf;
+ size_t sz;
+ int ret;
+ if (st->ct->task.error < 0) {
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);
+ goto out;
}
- }
- slot_io(&wfds);
- if (FD_ISSET(audiod_socket, &rfds)) {
- ret = handle_connect();
+ if (st->ct->status != CL_RECEIVING)
+ goto out;
+ ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
+ if (ret <= 0) {
+ struct timeval diff;
+ tv_diff(now, &st->last_status_read, &diff);
+ if (diff.tv_sec > 61)
+ kill_btrn(&st->ct->btrn, &st->ct->task,
+ -E_STATUS_TIMEOUT);
+ goto out;
+ }
+ btr_merge(st->btrn, st->min_iqs);
+ sz = btr_next_buffer(st->btrn, &buf);
+ ret = for_each_stat_item(buf, sz, update_item);
if (ret < 0) {
- PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+ kill_btrn(&st->ct->btrn, &st->ct->task, ret);
+ goto out;
}
+ if (sz != ret) {
+ btr_consume(st->btrn, sz - ret);
+ st->last_status_read = *now;
+ st->min_iqs = 0;
+ } else /* current status item crosses buffers */
+ st->min_iqs = sz + 1;
+ goto out;
}
- /* signals */
- if (FD_ISSET(signal_pipe, &rfds)) {
- int sig_nr = para_next_signal();
- if (sig_nr > 0)
- handle_signal(sig_nr);
+ btr_drain(st->btrn);
+ st->current_audio_format_num = -1;
+ if (tv_diff(now, &st->restart_barrier, NULL) < 0)
+ goto out;
+ if (st->clock_diff_count) { /* get status only one time */
+ char *argv[] = {"audiod", "--", "stat", "-p", "-n=1", NULL};
+ int argc = 5;
+ PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
+ st->clock_diff_count--;
+ client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
+ set_stat_task_restart_barrier(2);
+
+ } else {
+ char *argv[] = {"audiod", "--", "stat", "-p", NULL};
+ int argc = 4;
+ client_open(argc, argv, &st->ct, NULL, NULL, st->btrn, s);
+ set_stat_task_restart_barrier(5);
}
- goto repeat;
+ free(stat_item_values[SI_BASENAME]);
+ stat_item_values[SI_BASENAME] = para_strdup(
+ "no connection to para_server");
+ stat_client_write_item(SI_BASENAME);
+ st->last_status_read = *now;
+out:
+ start_stop_decoders();
+}
+
+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->sa_time_diff_sign = 1;
+ st->clock_diff_count = conf.clock_diff_count_arg;
+ st->current_audio_format_num = -1;
+ sprintf(st->task.status, "stat");
+ st->btrn = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = "stat"));
}
-#endif
static void set_initial_status(void)
{
return;
}
if (strcmp(conf.mode_arg, "on"))
- PARA_WARNING_LOG("%s", "invalid mode\n");
+ PARA_WARNING_LOG("invalid mode\n");
}
+__noreturn static void print_help_and_die(void)
+{
+ int d = conf.detailed_help_given;
+ const char **p = d? audiod_args_info_detailed_help
+ : audiod_args_info_help;
+
+ printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
+ AUDIOD_CMDLINE_PARSER_VERSION);
+ printf_or_die("%s\n\n", audiod_args_info_usage);
+ for (; *p; p++)
+ printf_or_die("%s\n", *p);
+ print_receiver_helps(d);
+ print_filter_helps(d);
+ print_writer_helps(d);
+ exit(0);
+}
+
+static void init_colors_or_die(void)
+{
+ int i;
+
+ if (!want_colors())
+ return;
+ daemon_set_default_log_colors();
+ daemon_set_flag(DF_COLOR_LOG);
+ for (i = 0; i < conf.log_color_given; i++)
+ daemon_set_log_color_or_die(conf.log_color_arg[i]);
+}
+
+/**
+ * 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 ret, i;
- struct sched s;
-
- init_sched();
+ struct command_task command_task_struct, *cmd_task = &command_task_struct;
+ struct audiod_cmdline_parser_params params = {
+ .override = 0,
+ .initialize = 1,
+ .check_required = 0,
+ .check_ambiguity = 0,
+ .print_errors = 1
+ };
valid_fd_012();
- hostname = para_hostname();
- cmdline_parser(argc, argv, &conf);
- para_drop_privileges(conf.user_arg, conf.group_arg);
- cf = configfile_exists();
- if (cf) {
- if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
- PARA_EMERG_LOG("%s", "parse error in config file\n");
- exit(EXIT_FAILURE);
- }
+ if (audiod_cmdline_parser_ext(argc, argv, &conf, ¶ms))
+ exit(EXIT_FAILURE);
+ HANDLE_VERSION_FLAG("audiod", conf);
+ /* init receivers/filters/writers early to make help work */
+ recv_init();
+ filter_init();
+ writer_init();
+ if (conf.help_given || conf.detailed_help_given)
+ print_help_and_die();
+ drop_privileges_or_die(conf.user_arg, conf.group_arg);
+ parse_config_or_die();
+ init_colors_or_die();
+ init_random_seed_or_die();
+ daemon_set_flag(DF_LOG_TIME);
+ daemon_set_flag(DF_LOG_HOSTNAME);
+ daemon_set_flag(DF_LOG_LL);
+ if (conf.log_timing_given)
+ daemon_set_flag(DF_LOG_TIMING);
+ if (conf.logfile_given) {
+ daemon_set_logfile(conf.logfile_arg);
+ daemon_open_log_or_die();
}
- if (conf.logfile_given)
- logfile = open_log(conf.logfile_arg);
- log_welcome("para_audiod", conf.loglevel_arg);
- i = init_stream_io();
- if (i < 0) {
- PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
+ ret = parse_stream_args();
+ if (ret < 0) {
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
}
- server_uptime(UPTIME_SET);
+ log_welcome("para_audiod");
+ set_server_start_time(NULL);
set_initial_status();
FOR_EACH_SLOT(i)
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);
- register_task(&sig_task->task);
- register_task(&cmd_task->task);
- register_task(&stat_task->task);
- register_task(&at->task);
- s.default_timeout.tv_sec = 0;
- s.default_timeout.tv_usec = 99 * 1000;
- ret = sched(&s);
+ if (conf.daemon_given)
+ daemonize(false /* parent exits immediately */);
+
+ register_task(&sched, &sig_task->task);
+ register_task(&sched, &cmd_task->task);
+ register_task(&sched, &stat_task->task);
+ sched.default_timeout.tv_sec = 2;
+ sched.default_timeout.tv_usec = 999 * 1000;
+ ret = schedule(&sched);
- PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
return EXIT_FAILURE;
}