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multiqueue: Add an extra cache time for unlinked streams

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When synchronizing the output by time, there are some use-cases (like
allowing gapless playback downstream) where we want the unlinked streams
to stay slightly behind the linked streams.

The "unlinked-cache-time" property allows the user to specify by how
much time the unlinked streams should wait before pushing again.
This commit is contained in:
Edward Hervey 2015-11-27 09:45:29 +01:00 committed by Edward Hervey
parent 72c31876aa
commit c51d2b2a37
2 changed files with 33 additions and 2 deletions
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33
plugins/elements/gstmultiqueue.c
View file

@ -256,6 +256,7 @@ enum
#define DEFAULT_HIGH_PERCENT 99
#define DEFAULT_SYNC_BY_RUNNING_TIME FALSE
#define DEFAULT_USE_INTERLEAVE FALSE
#define DEFAULT_UNLINKED_CACHE_TIME 250 * GST_MSECOND
enum
{
@ -271,6 +272,7 @@ enum
PROP_HIGH_PERCENT,
PROP_SYNC_BY_RUNNING_TIME,
PROP_USE_INTERLEAVE,
PROP_UNLINKED_CACHE_TIME,
PROP_LAST
};
@ -442,6 +444,14 @@ gst_multi_queue_class_init (GstMultiQueueClass * klass)
"Adjust time limits based on input interleave",
DEFAULT_USE_INTERLEAVE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_UNLINKED_CACHE_TIME,
g_param_spec_uint64 ("unlinked-cache-time", "Unlinked cache time (ns)",
"Extra buffering in time for unlinked streams (if 'sync-by-running-time')",
0, G_MAXUINT64, DEFAULT_UNLINKED_CACHE_TIME,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
gobject_class->finalize = gst_multi_queue_finalize;
gst_element_class_set_static_metadata (gstelement_class,
@ -480,6 +490,7 @@ gst_multi_queue_init (GstMultiQueue * mqueue)
mqueue->sync_by_running_time = DEFAULT_SYNC_BY_RUNNING_TIME;
mqueue->use_interleave = DEFAULT_USE_INTERLEAVE;
mqueue->unlinked_cache_time = DEFAULT_UNLINKED_CACHE_TIME;
mqueue->counter = 1;
mqueue->highid = -1;
@ -623,6 +634,11 @@ gst_multi_queue_set_property (GObject * object, guint prop_id,
break;
case PROP_USE_INTERLEAVE:
mq->use_interleave = g_value_get_boolean (value);
case PROP_UNLINKED_CACHE_TIME:
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
mq->unlinked_cache_time = g_value_get_uint64 (value);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@ -671,6 +687,8 @@ gst_multi_queue_get_property (GObject * object, guint prop_id,
break;
case PROP_USE_INTERLEAVE:
g_value_set_boolean (value, mq->use_interleave);
case PROP_UNLINKED_CACHE_TIME:
g_value_set_uint64 (value, mq->unlinked_cache_time);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@ -1546,6 +1564,9 @@ next:
/* Update the nextid so other threads know when to wake us up */
sq->nextid = newid;
/* Take into account the extra cache time since we're unlinked */
if (GST_CLOCK_TIME_IS_VALID (next_time))
next_time += mq->unlinked_cache_time;
sq->next_time = next_time;
/* Update the oldid (the last ID we output) for highid tracking */
@ -2490,8 +2511,16 @@ single_queue_check_full (GstDataQueue * dataq, guint visible, guint bytes,
res = IS_FILLED (sq, bytes, bytes);
/* We only care about limits in time if we're not a sparse stream or
* we're not syncing by running time */
if (!sq->is_sparse || !mq->sync_by_running_time)
res |= IS_FILLED (sq, time, sq->cur_time);
if (!sq->is_sparse || !mq->sync_by_running_time) {
/* If unlinked, take into account the extra unlinked cache time */
if (mq->sync_by_running_time && sq->srcresult == GST_FLOW_NOT_LINKED) {
if (sq->cur_time > mq->unlinked_cache_time)
res |= IS_FILLED (sq, time, sq->cur_time - mq->unlinked_cache_time);
else
res = FALSE;
} else
res |= IS_FILLED (sq, time, sq->cur_time);
}
return res;
}

2
plugins/elements/gstmultiqueue.h
View file

@ -81,6 +81,8 @@ struct _GstMultiQueue {
GstClockTime interleave; /* Input interleave */
GstClockTime last_interleave_update;
GstClockTime unlinked_cache_time;
};
struct _GstMultiQueueClass {