/*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file audiod.c the paraslash's audio daemon */
#include <sys/types.h>
#include <dirent.h>
+#include <signal.h>
#include "para.h"
#include "error.h"
#include "audiod.cmdline.h"
#include "list.h"
#include "sched.h"
+#include "ggo.h"
#include "recv.h"
#include "filter.h"
#include "grab_client.cmdline.h"
* */
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,
+};
+
+/**
+ * The task for obtaining para_server's status (para_client stat).
+ *
+ * \sa struct task, struct sched.
+ */
+struct status_task {
+ /** 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;
+ /** 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 array of status items sent by para_server. */
+char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
/**
* the current mode of operation of which can be changed by the on/off/cycle
struct audiod_args_info conf;
static char *socket_name;
-static FILE *logfile;
static struct audio_format_info afi[NUM_AUDIO_FORMATS];
static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
*
* \sa struct status_task
*/
-struct status_task *stat_task = &status_task_struct;
+static struct status_task *stat_task = &status_task_struct;
static struct timeval initial_delay_barrier;
/**
return -E_UNSUPPORTED_AUDIO_FORMAT;
}
-/**
- * the log function of para_audiod
- *
- * \param ll loglevel
- * \param fmt the format string
- */
-void para_log(int ll, const char* fmt,...)
+char *get_time_string(int slot_num)
{
- va_list argp;
- FILE *outfd;
- struct tm *tm;
- time_t t1;
- char str[MAXLINE] = "";
- static char *hostname;
-
- if (ll < conf.loglevel_arg)
- return;
- if (!logfile && conf.daemon_given)
- return;
- if (!hostname)
- hostname = para_hostname();
- 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 ret, seconds = 0, length;
+ struct timeval *tmp, sum, sss, /* server stream start */
+ wtime, /* now - writer start */
+ rskip; /* receiver start - sss */
+ struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
+
+ if (audiod_status == AUDIOD_OFF)
+ goto empty;
+ if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
+ if (stat_task->length_seconds) /* paused */
+ return NULL;
+ goto empty; /* stopped */
+ }
+ if (audiod_status == AUDIOD_ON && !s)
+ goto empty;
+ /* valid status items and playing */
+ if (s) { /* writer active in this slot */
+ length = s->seconds_total;
+ tmp = &s->server_stream_start;
+ } else { /* standby mode, rely on status items */
+ length = stat_task->length_seconds;
+ tmp = &stat_task->server_stream_start;
+ }
+ 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) {
+ struct timeval diff;
+ tv_diff(now, &sss, &diff);
+ seconds = diff.tv_sec + stat_task->offset_seconds;
+ goto out;
+ }
+ tv_diff(now, &s->wstime, &wtime);
+ seconds = s->offset_seconds;
+ ret = tv_diff(&s->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;
+out:
+ seconds = PARA_MIN(seconds, length);
+ seconds = PARA_MAX(seconds, 0);
+ return make_message(
+ "%s: %s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
+ status_item_list[SI_PLAY_TIME],
+ s? "" : "~",
+ seconds / 60,
+ seconds % 60,
+ (length - seconds) / 60,
+ (length - seconds) % 60,
+ length? (seconds * 100 + length / 2) / length : 0,
+ length / 60,
+ length % 60
+ );
+empty:
+ return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
+}
+
+static int want_colors(void)
+{
+ 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)
{
- char *home = para_homedir();
- char *config_file = make_message("%s/.paraslash/audiod.conf",
- home);
- free(home);
- if (file_exists(config_file))
- return 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);
+ }
+ 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);
- return NULL;
+ daemon_set_loglevel(conf.loglevel_arg);
+ return;
+err:
+ free(config_file);
+ exit(EXIT_FAILURE);
}
static void setup_signal_handling(void)
para_install_sighandler(SIGINT);
para_install_sighandler(SIGTERM);
para_install_sighandler(SIGHUP);
- signal(SIGPIPE, SIG_IGN);
+ para_sigaction(SIGPIPE, SIG_IGN);
}
static void clear_slot(int slot_num)
return;
PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
s->fc = para_calloc(sizeof(struct filter_chain));
- s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_chain));
- s->fc->inbuf = s->receiver_node->buf;
+ s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
+ s->fc->inbufp = &s->receiver_node->buf;
s->fc->in_loaded = &s->receiver_node->loaded;
s->fc->input_error = &s->receiver_node->task.error;
s->fc->task.pre_select = filter_pre_select;
INIT_LIST_HEAD(&fn->callbacks);
f->open(fn);
PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
- audio_formats[s->format], i + 1, nf, f->name, slot_num);
- s->fc->outbuf = fn->buf;
+ audio_formats[s->format], i, nf, f->name, slot_num);
+ s->fc->outbufp = &fn->buf;
s->fc->out_loaded = &fn->loaded;
}
register_task(&s->fc->task);
else
s->wng = wng_new(a->num_writers);
if (s->fc) {
- s->wng->buf = s->fc->outbuf;
+ s->wng->bufp = s->fc->outbufp;
s->wng->loaded = s->fc->out_loaded;
s->wng->input_error = &s->fc->task.error;
s->wng->channels = &s->fc->channels;
s->fc->output_error = &s->wng->task.error;
PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
} else {
- s->wng->buf = s->receiver_node->buf;
+ s->wng->bufp = &s->receiver_node->buf;
s->wng->loaded = &s->receiver_node->loaded;
s->wng->input_error = &s->receiver_node->task.error;
}
s->wng->writer_nodes[i].writer = a->writers[i];
}
ret = wng_open(s->wng);
- if (ret < 0) {
- PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ if (ret < 0)
return;
- }
s->wstime = *now;
+ s->server_stream_start = stat_task->server_stream_start.tv_sec?
+ stat_task->server_stream_start : *now;
+ s->offset_seconds = stat_task->offset_seconds;
+ s->seconds_total = stat_task->length_seconds;
activate_inactive_grab_clients(slot_num, s->format, s->fc);
}
audio_formats[s->format], a->receiver->name, slot_num);
rn->task.pre_select = a->receiver->pre_select;
rn->task.post_select = a->receiver->post_select;
+ s->rstime = *now;
sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
register_task(&rn->task);
ret = 1;
return ret;
}
+/* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
static int receiver_running(int format)
{
- int i;
+ int i, ret = 0;
FOR_EACH_SLOT(i) {
struct slot_info *s = &slot[i];
- if (s->format == format && s->receiver_node
- && s->receiver_node->task.error >= 0)
+ if (s->format != format)
+ continue;
+ if (!s->receiver_node)
+ continue;
+ if (s->receiver_node->task.error >= 0)
return 1;
+ ret = -1;
}
- return 0;
+ return ret;
}
-static int open_current_receiver(struct sched *s)
+static void open_current_receiver(struct sched *s)
{
struct timeval diff;
- int cafn = stat_task->current_audio_format_num;
+ int ret, cafn = stat_task->current_audio_format_num;
if (cafn < 0 || !stat_task->ct)
- return 0;
- if (receiver_running(cafn))
- return 0;
+ return;
+ /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
+ if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
+ return;
+ ret = receiver_running(cafn);
+ if (ret > 0) /* already running and not eof */
+ return;
+ if (ret < 0) { /* eof */
+ /*
+ * para_server uses a zero start time during the announcement
+ * period, i.e. before it sends the first chunk. Wait until
+ * this period begins to avoid restarting the receiver that
+ * belongs to the file just completed.
+ */
+ if (stat_task->server_stream_start.tv_sec)
+ return;
+ }
if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
+ /* avoid busy loop */
s->timeout = diff;
- return 0;
+ return;
}
- return open_receiver(cafn) < 0? 0 : 1;
+ /* start a new receiver */
+ open_receiver(cafn);
}
static unsigned compute_time_diff(const struct timeval *status_time)
tmp = make_message("%s\n", line);
stat_client_write(tmp, itemnum);
free(tmp);
- free(stat_task->stat_item_values[itemnum]);
- stat_task->stat_item_values[itemnum] = para_strdup(line);
+ free(stat_item_values[itemnum]);
+ stat_item_values[itemnum] = para_strdup(line);
ilen = strlen(status_item_list[itemnum]);
switch (itemnum) {
- case SI_STATUS:
- stat_task->playing = strstr(line, "playing")? 1 : 0;
- PARA_INFO_LOG("stat task playing: %d\n", stat_task->playing);
+ case SI_STATUS_FLAGS:
+ stat_task->vss_status = 0;
+ if (strchr(line, 'N'))
+ stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
+ if (strchr(line, 'P'))
+ stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
break;
case SI_OFFSET:
stat_task->offset_seconds = atoi(line + ilen + 1);
return filter_num;
a->filter_nums[nf] = filter_num;
a->num_filters++;
- PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
+ PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
filters[filter_num].name);
return filter_num;
}
-static int init_writers(void)
+static int parse_writer_args(void)
{
int i, ret, nw;
char *cmd;
struct audio_format_info *a;
- init_supported_writers();
- nw = PARA_MAX(1, conf.writer_given);
+ nw = PARA_MAX(1U, conf.writer_given);
PARA_INFO_LOG("maximal number of writers: %d\n", nw);
FOR_EACH_AUDIO_FORMAT(i) {
a = &afi[i];
return ret;
}
-static int init_receivers(void)
+static int parse_receiver_args(void)
{
int i, ret, receiver_num;
char *cmd = NULL;
struct audio_format_info *a;
- for (i = 0; receivers[i].name; i++) {
- PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
- receivers[i].init(&receivers[i]);
- }
for (i = conf.receiver_given - 1; i >= 0; i--) {
char *arg = conf.receiver_arg[i];
char *recv_arg = strchr(arg, ':');
return ret;
}
-static int init_filters(void)
+static int parse_filter_args(void)
{
int i, ret, nf;
- filter_init(filters);
- nf = PARA_MAX(1, conf.filter_given);
+ nf = PARA_MAX(1U, conf.filter_given);
PARA_INFO_LOG("maximal number of filters: %d\n", nf);
FOR_EACH_AUDIO_FORMAT(i) {
afi[i].filter_conf = para_malloc(nf * sizeof(void *));
return ret;
}
-static int init_stream_io(void)
+static int parse_stream_args(void)
{
int ret;
- ret = init_writers();
+ ret = parse_receiver_args();
if (ret < 0)
return ret;
- ret = init_receivers();
+ ret = parse_filter_args();
if (ret < 0)
return ret;
- ret = init_filters();
+ ret = parse_writer_args();
if (ret < 0)
return ret;
return 1;
static void signal_post_select(struct sched *s, struct task *t)
{
struct signal_task *st = container_of(t, struct signal_task, task);
- int signum;
if (!FD_ISSET(st->fd, &s->rfds))
return;
- signum = para_next_signal();
- switch (signum) {
+ st->signum = para_next_signal();
+ switch (st->signum) {
case SIGINT:
case SIGTERM:
case SIGHUP:
client_close(stat_task->ct);
stat_task->ct = NULL;
FOR_EACH_STATUS_ITEM(i) {
- free(stat_task->stat_item_values[i]);
- stat_task->stat_item_values[i] = NULL;
+ free(stat_item_values[i]);
+ stat_item_values[i] = NULL;
}
dump_empty_status();
stat_task->length_seconds = 0;
stat_task->offset_seconds = 0;
+ stat_task->vss_status = 0;
audiod_status_dump();
- stat_task->playing = 0;
- stat_task->stat_item_values[SI_BASENAME] = make_message(
- "%s: no connection to para_server\n",
- status_item_list[SI_BASENAME]);
- stat_client_write(stat_task->stat_item_values[SI_BASENAME],
- SI_BASENAME);
}
/**
FOR_EACH_SLOT(i)
try_to_close_slot(i);
- if (audiod_status != AUDIOD_ON || !stat_task->playing)
+ if (audiod_status != AUDIOD_ON ||
+ !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
return kill_all_decoders(-E_NOT_PLAYING);
open_current_receiver(s);
FOR_EACH_SLOT(i) {
int argc = 3;
PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
st->clock_diff_count--;
- client_open(argc, argv, &st->ct);
+ client_open(argc, argv, &st->ct, NULL);
set_stat_task_restart_barrier(2);
} else {
char *argv[] = {"audiod", "stat", NULL};
int argc = 2;
- client_open(argc, argv, &st->ct);
+ client_open(argc, argv, &st->ct, NULL);
set_stat_task_restart_barrier(5);
}
+ free(stat_item_values[SI_BASENAME]);
+ stat_item_values[SI_BASENAME] = make_message(
+ "%s: no connection to para_server\n",
+ status_item_list[SI_BASENAME]);
+ stat_client_write(stat_item_values[SI_BASENAME],
+ SI_BASENAME);
st->last_status_read = *now;
out:
start_stop_decoders(s);
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 ret, 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++) {
+ ret = daemon_set_log_color(conf.log_color_arg[i]);
+ if (ret < 0)
+ exit(EXIT_FAILURE);
+ }
+}
+
/**
* the main function of para_audiod
*
* */
int main(int argc, char *argv[])
{
- char *config_file;
int ret, i;
- struct sched s;
+ static struct sched s;
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();
- audiod_cmdline_parser(argc, argv, &conf);
+ if (audiod_cmdline_parser_ext(argc, argv, &conf, ¶ms))
+ exit(EXIT_FAILURE);
HANDLE_VERSION_FLAG("audiod", conf);
- para_drop_privileges(conf.user_arg, conf.group_arg);
- config_file = configfile_exists();
- if (config_file) {
- struct audiod_cmdline_parser_params params = {
- .override = 0,
- .initialize = 0,
- .check_required = 0,
- .check_ambiguity = 0
-
- };
- if (audiod_cmdline_parser_config_file(config_file, &conf, ¶ms)) {
- PARA_EMERG_LOG("parse error in config file\n");
- exit(EXIT_FAILURE);
- }
- free(config_file);
+ /* 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();
+ daemon_set_flag(DF_LOG_TIME);
+ daemon_set_flag(DF_LOG_HOSTNAME);
+ daemon_set_flag(DF_LOG_LL);
+ 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);
}
+ log_welcome("para_audiod");
server_uptime(UPTIME_SET);
set_initial_status();
FOR_EACH_SLOT(i)
init_command_task(cmd_task);
if (conf.daemon_given)
- daemon_init();
+ daemonize();
register_task(&sig_task->task);
register_task(&cmd_task->task);
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