/*
- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
* \sa struct status_task
*/
static struct status_task *stat_task = &status_task_struct;
-static struct timeval initial_delay_barrier;
/**
* the task for handling audiod commands
#define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
/**
- * 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.
return -E_UNSUPPORTED_AUDIO_FORMAT;
}
+/**
+ * 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 chain 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 slot_info *s = &slot[slot_num];
struct audio_format_info *a;
- struct timeval restart_delay = {0, 200 * 1000};
if (s->format < 0 || !s->receiver_node)
return;
btr_free_node(s->receiver_node->btrn);
free(s->receiver_node);
s->receiver_node = NULL;
- tv_add(now, &restart_delay, &afi[s->format].restart_barrier);
}
static void writer_cleanup(struct writer_node *wn)
int ret, slot_num;
struct receiver *r = a->receiver;
struct receiver_node *rn;
- const struct timeval restart_delay = {2, 0};
+ tv_add(now, &(struct timeval)EMBRACE(2, 0), &a->restart_barrier);
ret = get_empty_slot();
if (ret < 0)
- goto err;
+ return ret;
slot_num = ret;
- s = &slot[slot_num];
- s->format = format;
- s->receiver_node = para_calloc(sizeof(struct receiver_node));
- rn = s->receiver_node;
+ rn = para_calloc(sizeof(*rn));
rn->receiver = r;
rn->conf = a->receiver_conf;
rn->btrn = btr_new_node(&(struct btr_node_description)
if (ret < 0) {
btr_free_node(rn->btrn);
free(rn);
- s->receiver_node = NULL;
- goto err;
+ 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], r->name, slot_num);
+ 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(&rn->task);
- ret = slot_num;
-err:
- if (ret < 0)
- PARA_ERROR_LOG("%s\n", para_strerror(-ret));
- tv_add(now, &restart_delay, &afi[format].restart_barrier);
- return ret;
+ return slot_num;
}
-/* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
-static int receiver_running(int format)
+static bool receiver_running(void)
{
- int i, ret = 0;
+ int i;
+ long unsigned ss1 = stat_task->server_stream_start.tv_sec;
FOR_EACH_SLOT(i) {
struct slot_info *s = &slot[i];
- if (s->format != format)
- continue;
+ long unsigned ss2 = s->server_stream_start.tv_sec;
+
if (!s->receiver_node)
continue;
if (s->receiver_node->task.error >= 0)
- return 1;
- ret = -1;
+ return true;
+ if (ss1 == ss2)
+ return true;
}
- return ret;
+ return false;
}
+/**
+ * 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, newest_slot = -1;
/* whether a new instance of a decoder should be started. */
static bool must_start_decoder(void)
{
- int ret, cafn = stat_task->current_audio_format_num;
+ int cafn = stat_task->current_audio_format_num;
+ unsigned vs = stat_task->vss_status;
- if (cafn < 0 || !stat_task->ct)
+ if (cafn < 0)
return false;
- /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
- if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
+ if (!stat_task->ct)
return false;
- ret = receiver_running(cafn);
- if (ret != 0) /* already running */
+ 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;
break;
case SI_STREAM_START:
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;
stat_task->server_stream_start.tv_sec = sec;
stat_task->server_stream_start.tv_usec = usec;
- if (compute_time_diff(NULL) > 2) {
- if (stat_task->sa_time_diff_sign < 0)
- tv_add(&stat_task->server_stream_start,
- &stat_task->sa_time_diff, &a_start);
- else
- tv_diff(&stat_task->server_stream_start,
- &stat_task->sa_time_diff, &a_start);
- tv_add(&a_start, &delay, &initial_delay_barrier);
- }
}
break;
case SI_CURRENT_TIME:
if (a->num_filters)
continue; /* no default -- nothing to to */
+ /*
+ * If udp is used to receive this audiod format, add fecdec as
+ * the first filter.
+ */
+ if (strcmp(afi[i].receiver->name, "udp") == 0) {
+ tmp = para_strdup("fecdec");
+ add_filter(i, tmp);
+ free(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++)
{
int i, ret, nf;
- nf = PARA_MAX(1U, conf.filter_given);
+ nf = PARA_MAX(2U, 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 *));
if (!must_start_decoder())
return;
ret = open_receiver(stat_task->current_audio_format_num);
- if (ret < 0)
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
return;
+ }
sl = slot + ret;
a = afi + sl->format;
if (a->num_filters)
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