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identity: Add ts-offset property.

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Add a property to delay or advance sync time
when sync=true, with the same behaviour as
the ts-offset property in basesink
This commit is contained in:
Jan Schmidt 2015-07-14 13:11:11 +00:00
parent 0a1baf6d07
commit 0528645f7c
2 changed files with 24 additions and 0 deletions
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23
plugins/elements/gstidentity.c
View file

@ -72,6 +72,7 @@ enum
#define DEFAULT_CHECK_IMPERFECT_TIMESTAMP FALSE
#define DEFAULT_CHECK_IMPERFECT_OFFSET FALSE
#define DEFAULT_SIGNAL_HANDOFFS TRUE
#define DEFAULT_TS_OFFSET 0
enum
{
@ -86,6 +87,7 @@ enum
PROP_LAST_MESSAGE,
PROP_DUMP,
PROP_SYNC,
PROP_TS_OFFSET,
PROP_CHECK_IMPERFECT_TIMESTAMP,
PROP_CHECK_IMPERFECT_OFFSET,
PROP_SIGNAL_HANDOFFS
@ -197,6 +199,11 @@ gst_identity_class_init (GstIdentityClass * klass)
g_param_spec_boolean ("sync", "Synchronize",
"Synchronize to pipeline clock", DEFAULT_SYNC,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TS_OFFSET,
g_param_spec_int64 ("ts-offset", "Timestamp offset for synchronisation",
"Timestamp offset in nanoseconds for synchronisation, negative for earlier sync",
G_MININT64, G_MAXINT64, DEFAULT_TS_OFFSET,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_CHECK_IMPERFECT_TIMESTAMP,
g_param_spec_boolean ("check-imperfect-timestamp",
@ -274,6 +281,7 @@ gst_identity_init (GstIdentity * identity)
identity->dump = DEFAULT_DUMP;
identity->last_message = NULL;
identity->signal_handoffs = DEFAULT_SIGNAL_HANDOFFS;
identity->ts_offset = DEFAULT_TS_OFFSET;
g_cond_init (&identity->blocked_cond);
gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM_CAST (identity), TRUE);
@ -303,9 +311,18 @@ gst_identity_do_sync (GstIdentity * identity, GstClockTime running_time)
if ((clock = GST_ELEMENT (identity)->clock)) {
GstClockReturn cret;
GstClockTime timestamp;
GstClockTimeDiff ts_offset = identity->ts_offset;
timestamp = running_time + GST_ELEMENT (identity)->base_time +
identity->upstream_latency;
if (ts_offset < 0) {
ts_offset = -ts_offset;
if (ts_offset < timestamp)
timestamp -= ts_offset;
else
timestamp = 0;
} else
timestamp += ts_offset;
/* save id if we need to unlock */
identity->clock_id = gst_clock_new_single_shot_id (clock, timestamp);
@ -715,6 +732,9 @@ gst_identity_set_property (GObject * object, guint prop_id,
case PROP_SYNC:
identity->sync = g_value_get_boolean (value);
break;
case PROP_TS_OFFSET:
identity->ts_offset = g_value_get_int64 (value);
break;
case PROP_CHECK_IMPERFECT_TIMESTAMP:
identity->check_imperfect_timestamp = g_value_get_boolean (value);
break;
@ -775,6 +795,9 @@ gst_identity_get_property (GObject * object, guint prop_id, GValue * value,
case PROP_SYNC:
g_value_set_boolean (value, identity->sync);
break;
case PROP_TS_OFFSET:
identity->ts_offset = g_value_get_int64 (value);
break;
case PROP_CHECK_IMPERFECT_TIMESTAMP:
g_value_set_boolean (value, identity->check_imperfect_timestamp);
break;

1
plugins/elements/gstidentity.h
View file

@ -76,6 +76,7 @@ struct _GstIdentity {
GstClockTime upstream_latency;
GCond blocked_cond;
gboolean blocked;
GstClockTimeDiff ts_offset;
};
struct _GstIdentityClass {