*/
/** \file audiod.c the paraslash's audio daemon */
+#include <regex.h>
#include <sys/types.h>
#include <dirent.h>
#include <signal.h>
+#include <openssl/rc4.h>
#include "para.h"
#include "error.h"
+#include "crypt.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"
#include "grab_client.h"
#include "client.cmdline.h"
#include "client.h"
void **filter_conf;
/** the number of filters that should be activated for this audio format */
unsigned int num_writers;
- /** pointer to the array of writers to be activated */
- struct writer **writers;
+ /** 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 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};
* \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)
+int get_audio_format_num(const char *name)
{
int i;
return -E_UNSUPPORTED_AUDIO_FORMAT;
}
-char *get_time_string(struct timeval *newest_stime)
+char *get_time_string(int slot_num)
{
- struct timeval diff, adj_stream_start, tmp;
- int total = 0, use_server_time = 1,
- length_seconds = stat_task->length_seconds;
+ 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 (!stat_task->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_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 (audiod_status == AUDIOD_OFF)
- goto out;
if (stat_task->sa_time_diff_sign > 0)
- tv_diff(&stat_task->server_stream_start, &stat_task->sa_time_diff,
- &adj_stream_start);
+ tv_diff(tmp, &stat_task->sa_time_diff, &sss);
else
- tv_add(&stat_task->server_stream_start, &stat_task->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;
- }
+ 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, &tmp, &diff);
- total = diff.tv_sec + stat_task->offset_seconds;
- if (total > length_seconds)
- total = length_seconds;
- if (total < 0)
- total = 0;
+ 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],
- 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
+ "%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
);
+empty:
+ return para_strdup(NULL);
}
static int want_colors(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)
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_node));
- s->fc->inbuf = s->receiver_node->buf;
+ 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;
f->open(fn);
PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
audio_formats[s->format], i, nf, f->name, slot_num);
- s->fc->outbuf = fn->buf;
+ 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;
}
for (i = 0; i < a->num_writers; i++) {
s->wng->writer_nodes[i].conf = a->writer_conf[i];
- s->wng->writer_nodes[i].writer = a->writers[i];
+ s->wng->writer_nodes[i].writer_num = a->writer_nums[i];
}
ret = wng_open(s->wng);
- if (ret < 0) {
- PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ if (ret < 0)
return;
- }
s->wstime = *now;
- activate_inactive_grab_clients(slot_num, s->format, s->fc);
+ 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(s->format, s->fc);
}
static int open_receiver(int format)
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)
+ 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)
return count;
}
-static int check_stat_line(char *line, __a_unused void *data)
+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 1;
- itemnum = stat_line_valid(line);
- if (itemnum < 0) {
- PARA_WARNING_LOG("invalid status line: %s\n", line);
- return 1;
- }
if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
return 1;
- tmp = make_message("%s\n", line);
- stat_client_write(tmp, itemnum);
- free(tmp);
free(stat_item_values[itemnum]);
- stat_item_values[itemnum] = para_strdup(line);
- ilen = strlen(status_item_list[itemnum]);
+ stat_item_values[itemnum] = para_strdup(buf);
+ stat_client_write_item(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(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:
- stat_task->offset_seconds = atoi(line + ilen + 1);
+ stat_task->offset_seconds = atoi(buf);
break;
case SI_SECONDS_TOTAL:
- stat_task->length_seconds = atoi(line + ilen + 1);
+ stat_task->length_seconds = atoi(buf);
break;
case SI_STREAM_START:
- if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
+ if (sscanf(buf, "%lu.%lu", &sec, &usec) == 2) {
struct timeval a_start, delay;
delay.tv_sec = conf.stream_delay_arg / 1000;
delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
}
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(
- line + ilen + 1);
+ stat_task->current_audio_format_num
+ = get_audio_format_num(buf);
}
return 1;
}
FOR_EACH_AUDIO_FORMAT(i) {
a = &afi[i];
a->writer_conf = para_malloc(nw * sizeof(void *));
- a->writers = para_malloc(nw * sizeof(struct writer *));
+ a->writer_nums = para_malloc(nw * sizeof(int));
a->num_writers = 0;
}
for (i = 0; i < conf.writer_given; i++) {
ret = writer_num;
goto out;
}
- a->writers[nw] = &writers[writer_num];
+ a->writer_nums[nw] = writer_num;
a->writer_conf[nw] = wconf;
PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
nw, writer_names[writer_num]);
static void close_stat_pipe(void)
{
- int i;
-
if (!stat_task->ct)
return;
client_close(stat_task->ct);
stat_task->ct = NULL;
- FOR_EACH_STATUS_ITEM(i) {
- free(stat_item_values[i]);
- stat_item_values[i] = NULL;
- }
- dump_empty_status();
+ clear_and_dump_items();
stat_task->length_seconds = 0;
stat_task->offset_seconds = 0;
+ stat_task->vss_status = 0;
audiod_status_dump();
- stat_task->playing = 0;
}
/**
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) {
goto out;
}
if (st->ct) {
- unsigned bytes_left;
+ int ret;
if (st->ct->task.error < 0) {
if (st->ct->task.error != -E_TASK_UNREGISTERED)
goto out;
}
if (st->ct->status != CL_RECEIVING)
goto out;
- bytes_left = for_each_line(st->ct->buf, st->ct->loaded,
- &check_stat_line, NULL);
- if (st->ct->loaded != bytes_left) {
+ ret = for_each_stat_item(st->ct->buf, st->ct->loaded,
+ update_item);
+ if (ret < 0) {
+ st->ct->task.error = ret;
+ goto out;
+ }
+ if (st->ct->loaded != ret) {
st->last_status_read = *now;
- st->ct->loaded = bytes_left;
+ st->ct->loaded = ret;
} else {
struct timeval diff;
tv_diff(now, &st->last_status_read, &diff);
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", "1", NULL};
- int argc = 3;
+ char *argv[] = {"audiod", "--", "stat", "-p", "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);
set_stat_task_restart_barrier(2);
} else {
- char *argv[] = {"audiod", "stat", NULL};
- int argc = 2;
+ char *argv[] = {"audiod", "--", "stat", "-p", NULL};
+ int argc = 4;
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);
+ 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(s);
projects / paraslash.git / blobdiff