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GESTrack: add a duration property

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User can connect to the notify::duration signal if needed
This commit is contained in:
Thibault Saunier 2011-04-25 17:01:48 -04:00 committed by Edward Hervey
parent 776060452d
commit 6e0d6ba9c5
1 changed files with 45 additions and 0 deletions
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45
ges/ges-track.c
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@ -40,6 +40,7 @@ struct _GESTrackPrivate
/*< private > */
GESTimeline *timeline;
GList *trackobjects;
guint64 duration;
GstCaps *caps;
@ -52,6 +53,7 @@ enum
ARG_0,
ARG_CAPS,
ARG_TYPE,
ARG_DURATION,
ARG_LAST
};
@ -60,6 +62,8 @@ static GParamSpec *properties[ARG_LAST];
static void pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track);
static void
pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track);
static void composition_duration_cb (GstElement * composition, GParamSpec * arg
G_GNUC_UNUSED, GESTrack * obj);
static void
ges_track_get_property (GObject * object, guint property_id,
@ -74,6 +78,9 @@ ges_track_get_property (GObject * object, guint property_id,
case ARG_TYPE:
g_value_set_flags (value, track->type);
break;
case ARG_DURATION:
g_value_set_uint64 (value, track->priv->duration);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
@ -155,6 +162,18 @@ ges_track_class_init (GESTrackClass * klass)
g_object_class_install_property (object_class, ARG_CAPS,
properties[ARG_CAPS]);
/**
* GESTrack:duration
*
* Current duration of the track
*
* Default value: O
*/
properties[ARG_DURATION] = g_param_spec_uint64 ("duration", "Duration",
"The current duration of the track", 0, G_MAXUINT64, GST_SECOND,
G_PARAM_READABLE);
g_object_class_install_property (object_class, ARG_DURATION,
properties[ARG_DURATION]);
/**
* GESTrack:track-type
@ -182,6 +201,8 @@ ges_track_init (GESTrack * self)
self->priv->composition = gst_element_factory_make ("gnlcomposition", NULL);
g_signal_connect (G_OBJECT (self->priv->composition), "notify::duration",
G_CALLBACK (composition_duration_cb), self);
g_signal_connect (self->priv->composition, "pad-added",
(GCallback) pad_added_cb, self);
g_signal_connect (self->priv->composition, "pad-removed",
@ -429,6 +450,30 @@ pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track)
GST_DEBUG ("done");
}
static void
composition_duration_cb (GstElement * composition,
GParamSpec * arg G_GNUC_UNUSED, GESTrack * obj)
{
guint64 duration;
g_object_get (composition, "duration", &duration, NULL);
if (obj->priv->duration != duration) {
GST_DEBUG ("composition duration : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (duration),
GST_TIME_ARGS (obj->priv->duration));
obj->priv->duration = duration;
#if GLIB_CHECK_VERSION(2,26,0)
g_object_notify_by_pspec (G_OBJECT (obj), properties[ARG_DURATION]);
#else
g_object_notify (G_OBJECT (obj), "duration");
#endif
}
}
/**
* ges_track_get_caps:
* @track: a #GESTrack