mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-04 05:35:53 +00:00
timeline: Rework snapping signaling so it is easier to use
API: GESTimeline::snap-started signal API: GESTimeline::snap-ended signal (This code has not been released so we can still change the API)
This commit is contained in:
Thibault Saunier
parent
606a788314
commit
28d73a4441
|
|
@ -87,6 +87,11 @@ struct _MoveContext
|
|||
* properties so we don't end up always needing new move context */
|
||||
gboolean ignore_needs_ctx;
|
||||
gboolean needs_move_ctx;
|
||||
|
||||
/* Last snapping properties */
|
||||
GESTrackObject *last_snaped1;
|
||||
GESTrackObject *last_snaped2;
|
||||
GstClockTime last_snap_ts;
|
||||
};
|
||||
|
||||
struct _GESTimelinePrivate
|
||||
|
|
@ -151,7 +156,8 @@ enum
|
|||
LAYER_ADDED,
|
||||
LAYER_REMOVED,
|
||||
DISCOVERY_ERROR,
|
||||
OBJECT_SNAPPING,
|
||||
SNAPING_STARTED,
|
||||
SNAPING_ENDED,
|
||||
LAST_SIGNAL
|
||||
};
|
||||
|
||||
|
|
@ -358,13 +364,30 @@ ges_timeline_class_init (GESTimelineClass * klass)
|
|||
* @obj2: the second #GESTrackObject that was snapping.
|
||||
* @position: the position where the two objects finally snapping.
|
||||
*
|
||||
* Will be emitted after two track objects snapped together.
|
||||
* Will be emitted when the 2 #GESTrackObject first snapped
|
||||
*
|
||||
* Since: 0.10.XX
|
||||
*/
|
||||
ges_timeline_signals[OBJECT_SNAPPING] =
|
||||
g_signal_new ("track-objects-snapping", G_TYPE_FROM_CLASS (klass),
|
||||
G_SIGNAL_RUN_LAST, 0, NULL, NULL, ges_marshal_VOID__OBJECT,
|
||||
ges_timeline_signals[SNAPING_STARTED] =
|
||||
g_signal_new ("snapping-started", G_TYPE_FROM_CLASS (klass),
|
||||
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL,
|
||||
G_TYPE_NONE, 3, GES_TYPE_TRACK_OBJECT, GES_TYPE_TRACK_OBJECT,
|
||||
G_TYPE_UINT64);
|
||||
|
||||
/**
|
||||
* GESTimeline::snapping-end:
|
||||
* @timeline: the #GESTimeline
|
||||
* @obj1: the first #GESTrackObject that was snapping.
|
||||
* @obj2: the second #GESTrackObject that was snapping.
|
||||
* @position: the position where the two objects finally snapping.
|
||||
*
|
||||
* Will be emitted when the 2 #GESTrackObject ended to snap
|
||||
*
|
||||
* Since: 0.10.XX
|
||||
*/
|
||||
ges_timeline_signals[SNAPING_ENDED] =
|
||||
g_signal_new ("snapping-ended", G_TYPE_FROM_CLASS (klass),
|
||||
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL,
|
||||
G_TYPE_NONE, 3, GES_TYPE_TRACK_OBJECT, GES_TYPE_TRACK_OBJECT,
|
||||
G_TYPE_UINT64);
|
||||
}
|
||||
|
|
@ -585,6 +608,9 @@ init_movecontext (MoveContext * mv_ctx)
|
|||
mv_ctx->max_trim_pos = G_MAXUINT64;
|
||||
mv_ctx->min_move_layer = G_MAXUINT;
|
||||
mv_ctx->max_layer_prio = 0;
|
||||
mv_ctx->last_snaped1 = NULL;
|
||||
mv_ctx->last_snaped2 = NULL;
|
||||
mv_ctx->last_snap_ts = GST_CLOCK_TIME_NONE;
|
||||
}
|
||||
|
||||
static inline void
|
||||
|
|
@ -653,20 +679,45 @@ ges_timeline_emit_snappig (GESTimeline * timeline, GESTrackObject * obj1,
|
|||
guint64 * timecode)
|
||||
{
|
||||
GESTrackObject *obj2;
|
||||
MoveContext *mv_ctx = &timeline->priv->movecontext;
|
||||
|
||||
if (timecode == NULL) {
|
||||
if (mv_ctx->last_snaped1 != NULL && mv_ctx->last_snaped2 != NULL) {
|
||||
g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0,
|
||||
mv_ctx->last_snaped1, mv_ctx->last_snaped2, mv_ctx->last_snap_ts);
|
||||
|
||||
/* We then need to recalculate the moving context */
|
||||
timeline->priv->movecontext.needs_move_ctx = TRUE;
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
obj2 = g_hash_table_lookup (timeline->priv->by_object, timecode);
|
||||
|
||||
g_signal_emit (timeline, ges_timeline_signals[OBJECT_SNAPPING], 0,
|
||||
obj1, obj2, *timecode);
|
||||
if (mv_ctx->last_snap_ts != *timecode) {
|
||||
g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0,
|
||||
mv_ctx->last_snaped1, mv_ctx->last_snaped2, mv_ctx->last_snap_ts);
|
||||
|
||||
/* We then need to recalculate the moving context */
|
||||
timeline->priv->movecontext.needs_move_ctx = TRUE;
|
||||
/* We want the snap start signal to be emited anyway */
|
||||
mv_ctx->last_snap_ts = GST_CLOCK_TIME_NONE;
|
||||
}
|
||||
|
||||
if (GST_CLOCK_TIME_IS_VALID (mv_ctx->last_snap_ts) == FALSE) {
|
||||
|
||||
mv_ctx->last_snaped1 = obj1;
|
||||
mv_ctx->last_snaped2 = obj2;
|
||||
mv_ctx->last_snap_ts = *timecode;
|
||||
|
||||
g_signal_emit (timeline, ges_timeline_signals[SNAPING_STARTED], 0,
|
||||
obj1, obj2, *timecode);
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
/* If passing @trackobj will emit the snapping signal, otherwize it won't */
|
||||
static guint64 *
|
||||
ges_timeline_snap_position (GESTimeline * timeline, GESTrackObject * trackobj,
|
||||
guint64 * current, guint64 timecode)
|
||||
guint64 * current, guint64 timecode, gboolean emit)
|
||||
{
|
||||
GESTimelinePrivate *priv = timeline->priv;
|
||||
GSequenceIter *iter, *prev_iter, *nxt_iter;
|
||||
|
|
@ -724,8 +775,11 @@ ges_timeline_snap_position (GESTimeline * timeline, GESTrackObject * trackobj,
|
|||
|
||||
/* We emit the snapping signal only if we snapped with a different value
|
||||
* than the current one */
|
||||
if (trackobj && ret)
|
||||
if (emit) {
|
||||
ges_timeline_emit_snappig (timeline, trackobj, ret);
|
||||
GST_DEBUG_OBJECT (timeline, "Snaping at %" GST_TIME_FORMAT,
|
||||
GST_TIME_ARGS (*ret));
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -895,7 +949,8 @@ ges_timeline_trim_object_simple (GESTimeline * timeline, GESTrackObject * obj,
|
|||
if (snapping) {
|
||||
cur = g_hash_table_lookup (timeline->priv->by_start, obj);
|
||||
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position,
|
||||
TRUE);
|
||||
if (snapped)
|
||||
position = *snapped;
|
||||
}
|
||||
|
|
@ -919,7 +974,7 @@ ges_timeline_trim_object_simple (GESTimeline * timeline, GESTrackObject * obj,
|
|||
case GES_EDGE_END:
|
||||
{
|
||||
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
|
||||
if (snapped)
|
||||
position = *snapped;
|
||||
|
||||
|
|
@ -962,7 +1017,7 @@ timeline_ripple_object (GESTimeline * timeline, GESTrackObject * obj,
|
|||
GST_DEBUG ("Simply rippling");
|
||||
|
||||
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
|
||||
if (snapped)
|
||||
position = *snapped;
|
||||
|
||||
|
|
@ -994,7 +1049,7 @@ timeline_ripple_object (GESTimeline * timeline, GESTrackObject * obj,
|
|||
GST_DEBUG ("Rippling end");
|
||||
|
||||
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
|
||||
if (snapped)
|
||||
position = *snapped;
|
||||
|
||||
|
|
@ -1109,7 +1164,7 @@ timeline_roll_object (GESTimeline * timeline, GESTrackObject * obj,
|
|||
goto error;
|
||||
|
||||
cur = g_hash_table_lookup (timeline->priv->by_start, obj);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
|
||||
if (snapped)
|
||||
position = *snapped;
|
||||
|
||||
|
|
@ -1147,7 +1202,7 @@ timeline_roll_object (GESTimeline * timeline, GESTrackObject * obj,
|
|||
end = obj->start + obj->duration;
|
||||
|
||||
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
|
||||
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
|
||||
if (snapped)
|
||||
position = *snapped;
|
||||
|
||||
|
|
@ -1214,28 +1269,37 @@ ges_timeline_move_object_simple (GESTimeline * timeline,
|
|||
{
|
||||
guint64 *snap_end, *snap_st, *cur, off1, off2, end;
|
||||
|
||||
GST_DEBUG_OBJECT (timeline, "Moving to %" GST_TIME_FORMAT,
|
||||
GST_TIME_ARGS (position));
|
||||
|
||||
end = position + object->duration;
|
||||
cur = g_hash_table_lookup (timeline->priv->by_end, object);
|
||||
snap_end = ges_timeline_snap_position (timeline, object, cur, end);
|
||||
snap_end = ges_timeline_snap_position (timeline, object, cur, end, FALSE);
|
||||
if (snap_end)
|
||||
off1 = end > *snap_end ? end - *snap_end : *snap_end - end;
|
||||
else
|
||||
off1 = G_MAXUINT64;
|
||||
|
||||
cur = g_hash_table_lookup (timeline->priv->by_start, object);
|
||||
snap_st = ges_timeline_snap_position (timeline, object, cur, position);
|
||||
snap_st = ges_timeline_snap_position (timeline, object, cur, position, FALSE);
|
||||
if (snap_st)
|
||||
off2 = position > *snap_st ? position - *snap_st : *snap_st - position;
|
||||
else
|
||||
off2 = G_MAXUINT64;
|
||||
|
||||
/* In the case we could snap on both sides, we snap on the end */
|
||||
if (snap_end && off1 <= off2) {
|
||||
position = position + *snap_end - end;
|
||||
ges_timeline_emit_snappig (timeline, object, snap_end);
|
||||
GST_DEBUG_OBJECT (timeline, "Real snap at %" GST_TIME_FORMAT,
|
||||
GST_TIME_ARGS (position));
|
||||
} else if (snap_st) {
|
||||
position = position + *snap_st - position;
|
||||
ges_timeline_emit_snappig (timeline, object, snap_st);
|
||||
}
|
||||
GST_DEBUG_OBJECT (timeline, "Real snap at %" GST_TIME_FORMAT,
|
||||
GST_TIME_ARGS (position));
|
||||
} else
|
||||
ges_timeline_emit_snappig (timeline, object, NULL);
|
||||
|
||||
|
||||
ges_track_object_set_start (object, position);
|
||||
|
|
|
|||
Loading…
Reference in a new issue