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ges: Add a duration property to GESTimeline

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API: GESTimeline:duration property
This commit is contained in:
Thibault Saunier 2011-12-16 09:35:31 +01:00
parent 53c4eb35db
commit ffd196d06a
1 changed files with 71 additions and 0 deletions
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71
ges/ges-timeline.c
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@ -43,6 +43,8 @@
#include "ges-timeline-layer.h"
#include "ges.h"
static void track_duration_cb (GstElement * track,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline);
G_DEFINE_TYPE (GESTimeline, ges_timeline, GST_TYPE_BIN);
@ -58,6 +60,9 @@ struct _GESTimelinePrivate
GList *layers; /* A list of GESTimelineLayer sorted by priority */
GList *tracks; /* A list of private track data */
/* The duration of the timeline */
gint64 duration;
/* discoverer used for virgin sources */
GstDiscoverer *discoverer;
GList *pendingobjects;
@ -78,6 +83,15 @@ typedef struct
GstPad *ghostpad;
} TrackPrivate;
enum
{
PROP_0,
PROP_DURATION,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
enum
{
TRACK_ADDED,
@ -104,9 +118,14 @@ static void
ges_timeline_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTimeline *timeline = GES_TIMELINE (object);
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
case PROP_DURATION:
g_value_set_uint64 (value, timeline->priv->duration);
break;
}
}
@ -176,6 +195,20 @@ ges_timeline_class_init (GESTimelineClass * klass)
object_class->dispose = ges_timeline_dispose;
object_class->finalize = ges_timeline_finalize;
/**
* GESTimelineObject:duration
*
* Current duration (in nanoseconds) of the #GESTimeline
*
* Default value: 0
*/
properties[PROP_DURATION] =
g_param_spec_uint64 ("duration", "Duration",
"The duration of the timeline", 0, G_MAXUINT64,
GST_CLOCK_TIME_NONE, G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_DURATION,
properties[PROP_DURATION]);
/**
* GESTimeline::track-added
* @timeline: the #GESTimeline
@ -235,6 +268,7 @@ ges_timeline_init (GESTimeline * self)
self->priv->layers = NULL;
self->priv->tracks = NULL;
self->priv->duration = 0;
self->priv->pendingobjects_lock = g_mutex_new ();
/* New discoverer with a 15s timeout */
@ -963,6 +997,12 @@ ges_timeline_add_track (GESTimeline * timeline, GESTrack * track)
g_list_free (objects);
}
/* We connect to the duration change notify, so we can update
* our duration accordingly */
g_signal_connect (G_OBJECT (track), "notify::duration",
G_CALLBACK (track_duration_cb), timeline);
track_duration_cb (GST_ELEMENT (track), NULL, timeline);
return TRUE;
}
@ -1015,6 +1055,8 @@ ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track)
/* Remove pad-added/-removed handlers */
g_signal_handlers_disconnect_by_func (track, pad_added_cb, tr_priv);
g_signal_handlers_disconnect_by_func (track, pad_removed_cb, tr_priv);
g_signal_handlers_disconnect_by_func (track, track_duration_cb,
tr_priv->track);
/* Signal track removal to all layers/objects */
g_signal_emit (timeline, ges_timeline_signals[TRACK_REMOVED], 0, track);
@ -1135,3 +1177,32 @@ ges_timeline_enable_update (GESTimeline * timeline, gboolean enabled)
return res;
}
static void
track_duration_cb (GstElement * track,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
guint64 duration, max_duration = 0;
GList *tmp;
for (tmp = timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
g_object_get (tr_priv->track, "duration", &duration, NULL);
GST_DEBUG ("track duration : %" GST_TIME_FORMAT, GST_TIME_ARGS (duration));
max_duration = MAX (duration, max_duration);
}
if (timeline->priv->duration != max_duration) {
GST_DEBUG ("track duration : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (max_duration),
GST_TIME_ARGS (timeline->priv->duration));
timeline->priv->duration = max_duration;
#if GLIB_CHECK_VERSION(2,26,0)
g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]);
#else
g_object_notify (G_OBJECT (timeline), "duration");
#endif
}
}