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gstreamer/subprojects/gst-editing-services/ges/ges-track-element.c

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gestrackelement
* @title: GESTrackElement
* @short_description: Base Class for the elements of a #GESTrack
*
* A #GESTrackElement is a #GESTimelineElement that specifically belongs
* to a single #GESTrack of its #GESTimelineElement:timeline. Its
* #GESTimelineElement:start and #GESTimelineElement:duration specify its
* temporal extent in the track. Specifically, a track element wraps some
* nleobject, such as an #nlesource or #nleoperation, which can be
* retrieved with ges_track_element_get_nleobject(), and its
* #GESTimelineElement:start, #GESTimelineElement:duration,
* #GESTimelineElement:in-point, #GESTimelineElement:priority and
* #GESTrackElement:active properties expose the corresponding nleobject
* properties. When a track element is added to a track, its nleobject is
* added to the corresponding #nlecomposition that the track wraps.
*
* Most users will not have to work directly with track elements since a
* #GESClip will automatically create track elements for its timeline's
* tracks and take responsibility for updating them. The only track
* elements that are not automatically created by clips, but a user is
* likely to want to create, are #GESEffect-s.
*
* ## Control Bindings for Children Properties
*
* You can set up control bindings for a track element child property
* using ges_track_element_set_control_source(). A
* #GstTimedValueControlSource should specify the timed values using the
* internal source coordinates (see #GESTimelineElement). By default,
* these will be updated to lie between the #GESTimelineElement:in-point
* and out-point of the element. This can be switched off by setting
* #GESTrackElement:auto-clamp-control-sources to %FALSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-extractable.h"
#include "ges-track-element.h"
#include "ges-clip.h"
#include "ges-meta-container.h"
struct _GESTrackElementPrivate
{
GESTrackType track_type;
GstElement *nleobject; /* The NleObject */
GstElement *element; /* The element contained in the nleobject (can be NULL) */
GESTrack *track;
gboolean has_internal_source_forbidden;
gboolean has_internal_source;
gboolean layer_active;
GHashTable *bindings_hashtable; /* We need this if we want to be able to serialize
and deserialize keyframes */
GESAsset *creator_asset;
GstClockTime outpoint;
gboolean freeze_control_sources;
gboolean auto_clamp_control_sources;
};
enum
{
PROP_0,
PROP_ACTIVE,
PROP_TRACK_TYPE,
PROP_TRACK,
PROP_HAS_INTERNAL_SOURCE,
PROP_AUTO_CLAMP_CONTROL_SOURCES,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
enum
{
CONTROL_BINDING_ADDED,
CONTROL_BINDING_REMOVED,
LAST_SIGNAL
};
static guint ges_track_element_signals[LAST_SIGNAL] = { 0 };
static void ges_track_element_set_asset (GESExtractable * extractable,
GESAsset * asset);
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->set_asset = ges_track_element_set_asset;
iface->asset_type = GES_TYPE_TRACK_ELEMENT_ASSET;
}
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GESTrackElement, ges_track_element,
GES_TYPE_TIMELINE_ELEMENT, G_ADD_PRIVATE (GESTrackElement)
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE,
ges_extractable_interface_init));
static GstElement *ges_track_element_create_gnl_object_func (GESTrackElement *
object);
static gboolean _set_start (GESTimelineElement * element, GstClockTime start);
static gboolean _set_inpoint (GESTimelineElement * element,
GstClockTime inpoint);
static gboolean _set_duration (GESTimelineElement * element,
GstClockTime duration);
static gboolean _set_max_duration (GESTimelineElement * element,
GstClockTime max_duration);
static gboolean _set_priority (GESTimelineElement * element, guint32 priority);
GESTrackType _get_track_types (GESTimelineElement * object);
static gboolean
_lookup_child (GESTrackElement * object,
const gchar * prop_name, GstElement ** element, GParamSpec ** pspec)
{
return
GES_TIMELINE_ELEMENT_GET_CLASS (object)->lookup_child
(GES_TIMELINE_ELEMENT (object), prop_name, (GObject **) element, pspec);
}
static gboolean
strv_find_str (const gchar ** strv, const char *str)
{
guint i;
if (strv == NULL)
return FALSE;
for (i = 0; strv[i]; i++) {
if (g_strcmp0 (strv[i], str) == 0)
return TRUE;
}
return FALSE;
}
static guint32
_get_layer_priority (GESTimelineElement * element)
{
if (!element->parent)
return GES_TIMELINE_ELEMENT_NO_LAYER_PRIORITY;
return ges_timeline_element_get_layer_priority (element->parent);
}
static gboolean
_get_natural_framerate (GESTimelineElement * self, gint * framerate_n,
gint * framerate_d)
{
GESAsset *asset = ges_extractable_get_asset (GES_EXTRACTABLE (self));
/* FIXME: asset should **never** be NULL */
if (asset &&
ges_track_element_asset_get_natural_framerate (GES_TRACK_ELEMENT_ASSET
(asset), framerate_n, framerate_d))
return TRUE;
if (self->parent)
return ges_timeline_element_get_natural_framerate (self->parent,
framerate_n, framerate_d);
return FALSE;
}
static void
ges_track_element_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTrackElement *track_element = GES_TRACK_ELEMENT (object);
switch (property_id) {
case PROP_ACTIVE:
g_value_set_boolean (value, ges_track_element_is_active (track_element));
break;
case PROP_TRACK_TYPE:
g_value_set_flags (value, track_element->priv->track_type);
break;
case PROP_TRACK:
g_value_set_object (value, track_element->priv->track);
break;
case PROP_HAS_INTERNAL_SOURCE:
g_value_set_boolean (value,
ges_track_element_has_internal_source (track_element));
break;
case PROP_AUTO_CLAMP_CONTROL_SOURCES:
g_value_set_boolean (value,
ges_track_element_get_auto_clamp_control_sources (track_element));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_element_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTrackElement *track_element = GES_TRACK_ELEMENT (object);
switch (property_id) {
case PROP_ACTIVE:
ges_track_element_set_active (track_element, g_value_get_boolean (value));
break;
case PROP_TRACK_TYPE:
ges_track_element_set_track_type (track_element,
g_value_get_flags (value));
break;
case PROP_HAS_INTERNAL_SOURCE:
ges_track_element_set_has_internal_source (track_element,
g_value_get_boolean (value));
break;
case PROP_AUTO_CLAMP_CONTROL_SOURCES:
ges_track_element_set_auto_clamp_control_sources (track_element,
g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_element_dispose (GObject * object)
{
GESTrackElement *element = GES_TRACK_ELEMENT (object);
GESTrackElementPrivate *priv = element->priv;
if (priv->bindings_hashtable)
g_hash_table_destroy (priv->bindings_hashtable);
if (priv->nleobject) {
GstState cstate;
if (priv->track != NULL) {
g_error ("%p Still in %p, this means that you forgot"
" to remove it from the GESTrack it is contained in. You always need"
" to remove a GESTrackElement from its track before dropping the last"
" reference\n"
"This problem may also be caused by a refcounting bug in"
" the application or GES itself.", object, priv->track);
gst_element_get_state (priv->nleobject, &cstate, NULL, 0);
if (cstate != GST_STATE_NULL)
gst_element_set_state (priv->nleobject, GST_STATE_NULL);
}
g_object_set_qdata (G_OBJECT (priv->nleobject),
NLE_OBJECT_TRACK_ELEMENT_QUARK, NULL);
gst_object_unref (priv->nleobject);
priv->nleobject = NULL;
}
G_OBJECT_CLASS (ges_track_element_parent_class)->dispose (object);
}
static void
ges_track_element_set_asset (GESExtractable * extractable, GESAsset * asset)
{
GESTrackElementClass *class;
GstElement *nleobject;
gchar *tmp;
GESTrackElement *object = GES_TRACK_ELEMENT (extractable);
if (ges_track_element_get_track_type (object) == GES_TRACK_TYPE_UNKNOWN) {
ges_track_element_set_track_type (object,
ges_track_element_asset_get_track_type (GES_TRACK_ELEMENT_ASSET
(asset)));
}
class = GES_TRACK_ELEMENT_GET_CLASS (object);
g_assert (class->create_gnl_object);
nleobject = class->create_gnl_object (object);
if (G_UNLIKELY (nleobject == NULL)) {
GST_ERROR_OBJECT (object, "Could not create NleObject");
return;
}
tmp = g_strdup_printf ("%s:%s", G_OBJECT_TYPE_NAME (object),
GST_OBJECT_NAME (nleobject));
gst_object_set_name (GST_OBJECT (nleobject), tmp);
g_free (tmp);
object->priv->nleobject = gst_object_ref (nleobject);
g_object_set_qdata (G_OBJECT (nleobject), NLE_OBJECT_TRACK_ELEMENT_QUARK,
object);
/* Set some properties on the NleObject */
g_object_set (object->priv->nleobject,
"start", GES_TIMELINE_ELEMENT_START (object),
"inpoint", GES_TIMELINE_ELEMENT_INPOINT (object),
"duration", GES_TIMELINE_ELEMENT_DURATION (object),
"priority", GES_TIMELINE_ELEMENT_PRIORITY (object),
"active", object->active & object->priv->layer_active, NULL);
}
static void
ges_track_element_constructed (GObject * object)
{
GESTrackElement *self = GES_TRACK_ELEMENT (object);
if (self->priv->track_type == GES_TRACK_TYPE_UNKNOWN)
ges_track_element_set_track_type (GES_TRACK_ELEMENT (object),
GES_TRACK_ELEMENT_GET_CLASS (object)->ABI.abi.default_track_type);
/* set the default has-internal-source */
ges_track_element_set_has_internal_source (self,
GES_TRACK_ELEMENT_CLASS_DEFAULT_HAS_INTERNAL_SOURCE
(GES_TRACK_ELEMENT_GET_CLASS (object)));
G_OBJECT_CLASS (ges_track_element_parent_class)->constructed (object);
}
static void
ges_track_element_class_init (GESTrackElementClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
object_class->get_property = ges_track_element_get_property;
object_class->set_property = ges_track_element_set_property;
object_class->dispose = ges_track_element_dispose;
object_class->constructed = ges_track_element_constructed;
/**
* GESTrackElement:active:
*
* Whether the effect of the element should be applied in its
* #GESTrackElement:track. If set to %FALSE, it will not be used in
* the output of the track.
*/
properties[PROP_ACTIVE] =
g_param_spec_boolean ("active", "Active", "Use object in output", TRUE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_property (object_class, PROP_ACTIVE,
properties[PROP_ACTIVE]);
/**
* GESTrackElement:track-type:
*
* The track type of the element, which determines the type of track the
* element can be added to (see #GESTrack:track-type). This should
* correspond to the type of data that the element can produce or
* process.
*/
properties[PROP_TRACK_TYPE] = g_param_spec_flags ("track-type", "Track Type",
"The track type of the object", GES_TYPE_TRACK_TYPE,
GES_TRACK_TYPE_UNKNOWN, G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_property (object_class, PROP_TRACK_TYPE,
properties[PROP_TRACK_TYPE]);
/**
* GESTrackElement:track:
*
* The track that this element belongs to, or %NULL if it does not
* belong to a track.
*/
properties[PROP_TRACK] = g_param_spec_object ("track", "Track",
"The track the object is in", GES_TYPE_TRACK, G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_TRACK,
properties[PROP_TRACK]);
/**
* GESTrackElement:has-internal-source:
*
* This property is used to determine whether the 'internal time'
* properties of the element have any meaning. In particular, unless
* this is set to %TRUE, the #GESTimelineElement:in-point and
* #GESTimelineElement:max-duration can not be set to any value other
* than the default 0 and #GST_CLOCK_TIME_NONE, respectively.
*
* If an element has some *internal* *timed* source #GstElement that it
* reads stream data from as part of its function in a #GESTrack, then
* you'll likely want to set this to %TRUE to allow the
* #GESTimelineElement:in-point and #GESTimelineElement:max-duration to
* be set.
*
* The default value is determined by the #GESTrackElementClass
* @default_has_internal_source class property. For most
* #GESSourceClass-es, this will be %TRUE, with the exception of those
* that have a potentially *static* source, such as #GESImageSourceClass
* and #GESTitleSourceClass. Otherwise, this will usually be %FALSE.
*
* For most #GESOperation-s you will likely want to leave this set to
* %FALSE. The exception may be for an operation that reads some stream
* data from some private internal source as part of manipulating the
* input data from the usual linked upstream #GESTrackElement.
*
* For example, you may want to set this to %TRUE for a
* #GES_TRACK_TYPE_VIDEO operation that wraps a #textoverlay that reads
* from a subtitle file and places its text on top of the received video
* data. The #GESTimelineElement:in-point of the element would be used
* to shift the initial seek time on the #textoverlay away from 0, and
* the #GESTimelineElement:max-duration could be set to reflect the
* time at which the subtitle file runs out of data.
*
* Note that GES can not support track elements that have both internal
* content and manipulate the timing of their data streams (time
* effects).
*
* Since: 1.18
*/
properties[PROP_HAS_INTERNAL_SOURCE] =
g_param_spec_boolean ("has-internal-source", "Has Internal Source",
"Whether the element has some internal source of stream data", FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_property (object_class, PROP_HAS_INTERNAL_SOURCE,
properties[PROP_HAS_INTERNAL_SOURCE]);
/**
* GESTrackElement:auto-clamp-control-sources:
*
* Whether the control sources on the element (see
* ges_track_element_set_control_source()) will be automatically
* updated whenever the #GESTimelineElement:in-point or out-point of the
* element change in value.
*
* See ges_track_element_clamp_control_source() for how this is done
* per control source.
*
* Default value: %TRUE
*
* Since: 1.18
*/
properties[PROP_AUTO_CLAMP_CONTROL_SOURCES] =
g_param_spec_boolean ("auto-clamp-control-sources",
"Auto-Clamp Control Sources", "Whether to automatically update the "
"control sources with a change in in-point or out-point", TRUE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_property (object_class,
PROP_AUTO_CLAMP_CONTROL_SOURCES,
properties[PROP_AUTO_CLAMP_CONTROL_SOURCES]);
/**
* GESTrackElement::control-binding-added:
* @track_element: A #GESTrackElement
* @control_binding: The control binding that has been added
*
* This is emitted when a control binding is added to a child property
* of the track element.
*/
ges_track_element_signals[CONTROL_BINDING_ADDED] =
g_signal_new ("control-binding-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL,
G_TYPE_NONE, 1, GST_TYPE_CONTROL_BINDING);
/**
* GESTrackElement::control-binding-removed:
* @track_element: A #GESTrackElement
* @control_binding: The control binding that has been removed
*
* This is emitted when a control binding is removed from a child
* property of the track element.
*/
ges_track_element_signals[CONTROL_BINDING_REMOVED] =
g_signal_new ("control-binding-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL,
G_TYPE_NONE, 1, GST_TYPE_CONTROL_BINDING);
element_class->set_start = _set_start;
element_class->set_duration = _set_duration;
element_class->set_inpoint = _set_inpoint;
element_class->set_max_duration = _set_max_duration;
element_class->set_priority = _set_priority;
element_class->get_track_types = _get_track_types;
element_class->deep_copy = ges_track_element_copy_properties;
element_class->get_layer_priority = _get_layer_priority;
element_class->get_natural_framerate = _get_natural_framerate;
klass->create_gnl_object = ges_track_element_create_gnl_object_func;
klass->lookup_child = _lookup_child;
klass->ABI.abi.default_track_type = GES_TRACK_TYPE_UNKNOWN;
}
static void
ges_track_element_init (GESTrackElement * self)
{
GESTrackElementPrivate *priv = self->priv =
ges_track_element_get_instance_private (self);
/* Sane default values */
GES_TIMELINE_ELEMENT_START (self) = 0;
GES_TIMELINE_ELEMENT_INPOINT (self) = 0;
GES_TIMELINE_ELEMENT_DURATION (self) = GST_SECOND;
GES_TIMELINE_ELEMENT_PRIORITY (self) = 0;
self->active = TRUE;
self->priv->layer_active = TRUE;
priv->bindings_hashtable = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, NULL);
/* NOTE: make sure we set this flag to TRUE so that
* g_object_new (, "has-internal-source", TRUE, "in-point", 10, NULL);
* can succeed. The problem is that "in-point" will always be set before
* has-internal-source is set, so we first assume that it is TRUE.
* Note that if we call
* g_object_new (, "has-internal-source", FALSE, "in-point", 10, NULL);
* then "in-point" will be allowed to be set, but then when
* "has-internal-source" is later set to TRUE, this will set the
* "in-point" back to 0.
* This is particularly needed for the ges_timeline_element_copy method
* because it calls g_object_new_with_properties.
*/
self->priv->has_internal_source = TRUE;
self->priv->outpoint = GST_CLOCK_TIME_NONE;
self->priv->auto_clamp_control_sources = TRUE;
}
static gfloat
interpolate_values_for_position (GstTimedValue * first_value,
GstTimedValue * second_value, guint64 position, gboolean absolute)
{
gfloat diff;
GstClockTime interval;
gfloat value_at_pos;
g_assert (second_value || first_value);
if (first_value == NULL)
return second_value->value;
if (second_value == NULL)
return first_value->value;
diff = second_value->value - first_value->value;
interval = second_value->timestamp - first_value->timestamp;
/* FIXME: properly support non-linear timed control sources */
if (position > first_value->timestamp)
value_at_pos =
first_value->value + ((float) (position -
first_value->timestamp) / (float) interval) * diff;
else
value_at_pos =
first_value->value - ((float) (first_value->timestamp -
position) / (float) interval) * diff;
if (!absolute)
value_at_pos = CLAMP (value_at_pos, 0.0, 1.0);
return value_at_pos;
}
static void
_update_control_source (GstTimedValueControlSource * source, gboolean absolute,
GstClockTime inpoint, GstClockTime outpoint)
{
GList *values, *tmp;
GstTimedValue *last, *first, *prev = NULL, *next = NULL;
gfloat value_at_pos;
if (inpoint == outpoint) {
gst_timed_value_control_source_unset_all (source);
return;
}
values = gst_timed_value_control_source_get_all (source);
if (g_list_length (values) == 0)
return;
first = values->data;
for (tmp = values->next; tmp; tmp = tmp->next) {
next = tmp->data;
if (next->timestamp == inpoint) {
/* just leave this value in place */
first = NULL;
break;
}
if (next->timestamp > inpoint)
break;
}
g_list_free (values);
if (first) {
value_at_pos =
interpolate_values_for_position (first, next, inpoint, absolute);
gst_timed_value_control_source_unset (source, first->timestamp);
gst_timed_value_control_source_set (source, inpoint, value_at_pos);
}
if (GST_CLOCK_TIME_IS_VALID (outpoint)) {
values = gst_timed_value_control_source_get_all (source);
last = g_list_last (values)->data;
for (tmp = g_list_last (values)->prev; tmp; tmp = tmp->prev) {
prev = tmp->data;
if (prev->timestamp == outpoint) {
/* leave this value in place */
last = NULL;
break;
}
if (prev->timestamp < outpoint)
break;
}
g_list_free (values);
if (last) {
value_at_pos =
interpolate_values_for_position (prev, last, outpoint, absolute);
gst_timed_value_control_source_unset (source, last->timestamp);
gst_timed_value_control_source_set (source, outpoint, value_at_pos);
}
}
values = gst_timed_value_control_source_get_all (source);
for (tmp = values; tmp; tmp = tmp->next) {
GstTimedValue *value = tmp->data;
if (value->timestamp < inpoint)
gst_timed_value_control_source_unset (source, value->timestamp);
else if (GST_CLOCK_TIME_IS_VALID (outpoint) && value->timestamp > outpoint)
gst_timed_value_control_source_unset (source, value->timestamp);
}
g_list_free (values);
}
static void
_update_control_bindings (GESTrackElement * self, GstClockTime inpoint,
GstClockTime outpoint)
{
gchar *name;
GstControlBinding *binding;
GstControlSource *source;
gboolean absolute;
gpointer value, key;
GHashTableIter iter;
if (self->priv->freeze_control_sources)
return;
g_hash_table_iter_init (&iter, self->priv->bindings_hashtable);
while (g_hash_table_iter_next (&iter, &key, &value)) {
binding = value;
name = key;
g_object_get (binding, "control-source", &source, "absolute", &absolute,
NULL);
if (!GST_IS_TIMED_VALUE_CONTROL_SOURCE (source)) {
GST_INFO_OBJECT (self, "Not updating %s because it does not have a"
" timed value control source", name);
gst_object_unref (source);
continue;
}
_update_control_source (GST_TIMED_VALUE_CONTROL_SOURCE (source), absolute,
inpoint, outpoint);
gst_object_unref (source);
}
}
static gboolean
_set_start (GESTimelineElement * element, GstClockTime start)
{
GESTrackElement *object = GES_TRACK_ELEMENT (element);
g_return_val_if_fail (object->priv->nleobject, FALSE);
g_object_set (object->priv->nleobject, "start", start, NULL);
return TRUE;
}
static void
ges_track_element_update_outpoint_full (GESTrackElement * self,
GstClockTime inpoint, GstClockTime duration)
{
GstClockTime current_inpoint = _INPOINT (self);
gboolean increase = (inpoint > current_inpoint);
GstClockTime outpoint = GST_CLOCK_TIME_NONE;
GESTimelineElement *parent = GES_TIMELINE_ELEMENT_PARENT (self);
GESTrackElementPrivate *priv = self->priv;
if (GES_IS_CLIP (parent) && ges_track_element_get_track (self)
&& ges_track_element_is_active (self)
&& GST_CLOCK_TIME_IS_VALID (duration)) {
outpoint =
ges_clip_get_internal_time_from_timeline_time (GES_CLIP (parent), self,
_START (self) + duration, NULL);
if (!GST_CLOCK_TIME_IS_VALID (outpoint))
GST_ERROR_OBJECT (self, "Got an invalid out-point");
else if (increase)
outpoint += (inpoint - current_inpoint);
else
outpoint -= (current_inpoint - inpoint);
}
if ((priv->outpoint != outpoint || inpoint != current_inpoint)
&& self->priv->auto_clamp_control_sources)
_update_control_bindings (self, inpoint, outpoint);
priv->outpoint = outpoint;
}
void
ges_track_element_update_outpoint (GESTrackElement * self)
{
GESTimelineElement *el = GES_TIMELINE_ELEMENT (self);
ges_track_element_update_outpoint_full (self, el->inpoint, el->duration);
}
static gboolean
_set_inpoint (GESTimelineElement * element, GstClockTime inpoint)
{
GESTrackElement *object = GES_TRACK_ELEMENT (element);
GESTimelineElement *parent = element->parent;
GError *error = NULL;
g_return_val_if_fail (object->priv->nleobject, FALSE);
if (inpoint && !object->priv->has_internal_source) {
GST_WARNING_OBJECT (element, "Cannot set an in-point for a track "
"element that is not registered with internal content");
return FALSE;
}
if (GES_IS_CLIP (parent)
&& !ges_clip_can_set_inpoint_of_child (GES_CLIP (parent), object,
inpoint, &error)) {
GST_WARNING_OBJECT (element, "Cannot set an in-point of %"
GST_TIME_FORMAT " because the parent clip %" GES_FORMAT
" would not allow it%s%s", GST_TIME_ARGS (inpoint),
GES_ARGS (parent), error ? ": " : "", error ? error->message : "");
g_clear_error (&error);
return FALSE;
}
g_object_set (object->priv->nleobject, "inpoint", inpoint, NULL);
ges_track_element_update_outpoint_full (object, inpoint, element->duration);
return TRUE;
}
static gboolean
_set_duration (GESTimelineElement * element, GstClockTime duration)
{
GESTrackElement *object = GES_TRACK_ELEMENT (element);
GESTrackElementPrivate *priv = object->priv;
g_return_val_if_fail (priv->nleobject, FALSE);
g_object_set (priv->nleobject, "duration", duration, NULL);
ges_track_element_update_outpoint_full (object, element->inpoint, duration);
return TRUE;
}
static gboolean
_set_max_duration (GESTimelineElement * element, GstClockTime max_duration)
{
GESTrackElement *object = GES_TRACK_ELEMENT (element);
GESTimelineElement *parent = element->parent;
GError *error = NULL;
if (GST_CLOCK_TIME_IS_VALID (max_duration)
&& !object->priv->has_internal_source) {
GST_WARNING_OBJECT (element, "Cannot set a max-duration for a track "
"element that is not registered with internal content");
return FALSE;
}
if (GES_IS_CLIP (parent)
&& !ges_clip_can_set_max_duration_of_child (GES_CLIP (parent), object,
max_duration, &error)) {
GST_WARNING_OBJECT (element, "Cannot set a max-duration of %"
GST_TIME_FORMAT " because the parent clip %" GES_FORMAT
" would not allow it%s%s", GST_TIME_ARGS (max_duration),
GES_ARGS (parent), error ? ": " : "", error ? error->message : "");
g_clear_error (&error);
return FALSE;
}
return TRUE;
}
static gboolean
_set_priority (GESTimelineElement * element, guint32 priority)
{
GESTrackElement *object = GES_TRACK_ELEMENT (element);
GESTimelineElement *parent = element->parent;
GError *error = NULL;
g_return_val_if_fail (object->priv->nleobject, FALSE);
if (priority < MIN_NLE_PRIO) {
GST_INFO_OBJECT (element, "Priority (%d) < MIN_NLE_PRIO, setting it to %d",
priority, MIN_NLE_PRIO);
priority = MIN_NLE_PRIO;
}
GST_DEBUG_OBJECT (object, "priority:%" G_GUINT32_FORMAT, priority);
if (G_UNLIKELY (priority == _PRIORITY (object)))
return FALSE;
if (GES_IS_CLIP (parent)
&& !ges_clip_can_set_priority_of_child (GES_CLIP (parent), object,
priority, &error)) {
GST_WARNING_OBJECT (element, "Cannot set a priority of %"
G_GUINT32_FORMAT " because the parent clip %" GES_FORMAT
" would not allow it%s%s", priority, GES_ARGS (parent),
error ? ": " : "", error ? error->message : "");
g_clear_error (&error);
return FALSE;
}
g_object_set (object->priv->nleobject, "priority", priority, NULL);
return TRUE;
}
GESTrackType
_get_track_types (GESTimelineElement * object)
{
return ges_track_element_get_track_type (GES_TRACK_ELEMENT (object));
}
/**
* ges_track_element_set_active:
* @object: A #GESTrackElement
* @active: Whether @object should be active in its track
*
* Sets #GESTrackElement:active for the element.
*
* Returns: %TRUE if the property was *toggled*.
*/
gboolean
ges_track_element_set_active (GESTrackElement * object, gboolean active)
{
GESTimelineElement *parent;
GError *error = NULL;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
g_return_val_if_fail (object->priv->nleobject, FALSE);
GST_DEBUG_OBJECT (object, "object:%p, active:%d", object, active);
if (G_UNLIKELY (active == object->active))
return FALSE;
parent = GES_TIMELINE_ELEMENT_PARENT (object);
if (GES_IS_CLIP (parent)
&& !ges_clip_can_set_active_of_child (GES_CLIP (parent), object, active,
&error)) {
GST_WARNING_OBJECT (object,
"Cannot set active to %i because the parent clip %" GES_FORMAT
" would not allow it%s%s", active, GES_ARGS (parent), error ? ": " : "",
error ? error->message : "");
g_clear_error (&error);
return FALSE;
}
g_object_set (object->priv->nleobject, "active",
active & object->priv->layer_active, NULL);
object->active = active;
if (GES_TRACK_ELEMENT_GET_CLASS (object)->active_changed)
GES_TRACK_ELEMENT_GET_CLASS (object)->active_changed (object, active);
g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_ACTIVE]);
return TRUE;
}
/**
* ges_track_element_set_has_internal_source:
* @object: A #GESTrackElement
* @has_internal_source: Whether the @object should be allowed to have its
* 'internal time' properties set.
*
* Sets #GESTrackElement:has-internal-source for the element. If this is
* set to %FALSE, this method will also set the
* #GESTimelineElement:in-point of the element to 0 and its
* #GESTimelineElement:max-duration to #GST_CLOCK_TIME_NONE.
*
* Returns: %FALSE if @has_internal_source is forbidden for @object and
* %TRUE in any other case.
*
* Since: 1.18
*/
gboolean
ges_track_element_set_has_internal_source (GESTrackElement * object,
gboolean has_internal_source)
{
GESTimelineElement *element;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
GST_DEBUG_OBJECT (object, "object:%p, has-internal-source: %s", object,
has_internal_source ? "TRUE" : "FALSE");
if (has_internal_source && object->priv->has_internal_source_forbidden) {
GST_WARNING_OBJECT (object, "Setting an internal source for this "
"element is forbidden");
return FALSE;
}
if (G_UNLIKELY (has_internal_source == object->priv->has_internal_source))
return TRUE;
object->priv->has_internal_source = has_internal_source;
if (!has_internal_source) {
element = GES_TIMELINE_ELEMENT (object);
ges_timeline_element_set_inpoint (element, 0);
ges_timeline_element_set_max_duration (element, GST_CLOCK_TIME_NONE);
}
g_object_notify_by_pspec (G_OBJECT (object),
properties[PROP_HAS_INTERNAL_SOURCE]);
return TRUE;
}
void
ges_track_element_set_has_internal_source_is_forbidden (GESTrackElement *
element)
{
element->priv->has_internal_source_forbidden = TRUE;
}
/**
* ges_track_element_set_track_type:
* @object: A #GESTrackElement
* @type: The new track-type for @object
*
* Sets the #GESTrackElement:track-type for the element.
*/
void
ges_track_element_set_track_type (GESTrackElement * object, GESTrackType type)
{
g_return_if_fail (GES_IS_TRACK_ELEMENT (object));
if (object->priv->track_type != type) {
object->priv->track_type = type;
g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_TRACK_TYPE]);
}
}
/**
* ges_track_element_get_track_type:
* @object: A #GESTrackElement
*
* Gets the #GESTrackElement:track-type for the element.
*
* Returns: The track-type of @object.
*/
GESTrackType
ges_track_element_get_track_type (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), GES_TRACK_TYPE_UNKNOWN);
return object->priv->track_type;
}
/* default 'create_gnl_object' virtual method implementation */
static GstElement *
ges_track_element_create_gnl_object_func (GESTrackElement * self)
{
GESTrackElementClass *klass = NULL;
GstElement *child = NULL;
GstElement *nleobject;
klass = GES_TRACK_ELEMENT_GET_CLASS (self);
if (G_UNLIKELY (self->priv->nleobject != NULL))
goto already_have_nleobject;
if (G_UNLIKELY (klass->nleobject_factorytype == NULL))
goto no_nlefactory;
GST_DEBUG ("Creating a supporting nleobject of type '%s'",
klass->nleobject_factorytype);
nleobject = gst_element_factory_make (klass->nleobject_factorytype, NULL);
if (G_UNLIKELY (nleobject == NULL))
goto no_nleobject;
if (klass->create_element) {
GST_DEBUG ("Calling subclass 'create_element' vmethod");
child = klass->create_element (self);
if (G_UNLIKELY (!child))
goto child_failure;
if (!gst_bin_add (GST_BIN (nleobject), child))
goto add_failure;
GST_DEBUG ("Successfully got the element to put in the nleobject");
self->priv->element = child;
}
GST_DEBUG ("done");
return nleobject;
/* ERROR CASES */
already_have_nleobject:
{
GST_ERROR ("Already controlling a NleObject %s",
GST_ELEMENT_NAME (self->priv->nleobject));
return NULL;
}
no_nlefactory:
{
GST_ERROR ("No GESTrackElement::nleobject_factorytype implementation!");
return NULL;
}
no_nleobject:
{
GST_ERROR ("Error creating a nleobject of type '%s'",
klass->nleobject_factorytype);
return NULL;
}
child_failure:
{
GST_ERROR ("create_element returned NULL");
gst_object_unref (nleobject);
return NULL;
}
add_failure:
{
GST_ERROR ("Error adding the contents to the nleobject");
gst_object_unref (child);
gst_object_unref (nleobject);
return NULL;
}
}
static void
ges_track_element_add_child_props (GESTrackElement * self,
GstElement * child, const gchar ** wanted_categories,
const gchar ** blacklist, const gchar ** whitelist)
{
GstElementFactory *factory;
const gchar *klass;
GParamSpec **parray;
GObjectClass *gobject_klass;
gchar **categories;
guint i;
factory = gst_element_get_factory (child);
/* FIXME: handle NULL factory */
klass = gst_element_factory_get_metadata (factory,
GST_ELEMENT_METADATA_KLASS);
if (strv_find_str (blacklist, GST_OBJECT_NAME (factory))) {
GST_DEBUG_OBJECT (self, "%s blacklisted", GST_OBJECT_NAME (factory));
return;
}
GST_DEBUG_OBJECT (self, "Looking at element '%s' of klass '%s'",
GST_ELEMENT_NAME (child), klass);
categories = g_strsplit (klass, "/", 0);
for (i = 0; categories[i]; i++) {
if ((!wanted_categories ||
strv_find_str (wanted_categories, categories[i]))) {
guint i, nb_specs;
gobject_klass = G_OBJECT_GET_CLASS (child);
parray = g_object_class_list_properties (gobject_klass, &nb_specs);
for (i = 0; i < nb_specs; i++) {
if ((!whitelist && (parray[i]->flags & G_PARAM_WRITABLE))
|| (strv_find_str (whitelist, parray[i]->name))) {
ges_timeline_element_add_child_property (GES_TIMELINE_ELEMENT
(self), parray[i], G_OBJECT (child));
}
}
g_free (parray);
GST_DEBUG
("%d configurable properties of '%s' added to property hashtable",
nb_specs, GST_ELEMENT_NAME (child));
break;
}
}
g_strfreev (categories);
}
/**
* ges_track_element_add_children_props:
* @self: A #GESTrackElement
* @element: The child object to retrieve properties from
* @wanted_categories: (array zero-terminated=1) (transfer none) (allow-none):
* An array of element factory "klass" categories to whitelist, or %NULL
* to accept all categories
* @blacklist: (array zero-terminated=1) (transfer none) (allow-none): A
* blacklist of element factory names, or %NULL to not blacklist any
* element factory
* @whitelist: (array zero-terminated=1) (transfer none) (allow-none): A
* whitelist of element property names, or %NULL to whitelist all
* writeable properties
*
* Adds all the properties of a #GstElement that match the criteria as
* children properties of the track element. If the name of @element's
* #GstElementFactory is not in @blacklist, and the factory's
* #GST_ELEMENT_METADATA_KLASS contains at least one member of
* @wanted_categories (e.g. #GST_ELEMENT_FACTORY_KLASS_DECODER), then
* all the properties of @element that are also in @whitelist are added as
* child properties of @self using
* ges_timeline_element_add_child_property().
*
* This is intended to be used by subclasses when constructing.
*/
void
ges_track_element_add_children_props (GESTrackElement * self,
GstElement * element, const gchar ** wanted_categories,
const gchar ** blacklist, const gchar ** whitelist)
{
GValue item = { 0, };
GstIterator *it;
gboolean done = FALSE;
if (!GST_IS_BIN (element)) {
ges_track_element_add_child_props (self, element, wanted_categories,
blacklist, whitelist);
return;
}
/* We go over child elements recursively, and add writable properties to the
* hashtable */
it = gst_bin_iterate_recurse (GST_BIN (element));
while (!done) {
switch (gst_iterator_next (it, &item)) {
case GST_ITERATOR_OK:
{
GstElement *child = g_value_get_object (&item);
ges_track_element_add_child_props (self, child, wanted_categories,
blacklist, whitelist);
g_value_reset (&item);
break;
}
case GST_ITERATOR_RESYNC:
/* FIXME, properly restart the process */
GST_DEBUG ("iterator resync");
gst_iterator_resync (it);
break;
case GST_ITERATOR_DONE:
GST_DEBUG ("iterator done");
done = TRUE;
break;
default:
break;
}
g_value_unset (&item);
}
gst_iterator_free (it);
}
/* INTERNAL USAGE */
gboolean
ges_track_element_set_track (GESTrackElement * object, GESTrack * track,
GError ** error)
{
GESTimelineElement *parent = GES_TIMELINE_ELEMENT_PARENT (object);
g_return_val_if_fail (object->priv->nleobject, FALSE);
GST_DEBUG_OBJECT (object, "new track: %" GST_PTR_FORMAT, track);
if (GES_IS_CLIP (parent)
&& !ges_clip_can_set_track_of_child (GES_CLIP (parent), object, track,
error)) {
GST_INFO_OBJECT (object,
"The parent clip %" GES_FORMAT " would not allow the track to be "
"set to %" GST_PTR_FORMAT, GES_ARGS (parent), track);
return FALSE;
}
object->priv->track = track;
if (object->priv->track) {
ges_track_element_set_track_type (object, track->type);
g_object_set (object->priv->nleobject,
"caps", ges_track_get_caps (object->priv->track), NULL);
}
g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_TRACK]);
return TRUE;
}
void
ges_track_element_set_layer_active (GESTrackElement * element, gboolean active)
{
if (element->priv->layer_active == active)
return;
element->priv->layer_active = active;
g_object_set (element->priv->nleobject, "active", active & element->active,
NULL);
}
/**
* ges_track_element_get_all_control_bindings
* @trackelement: A #GESTrackElement
*
* Get all the control bindings that have been created for the children
* properties of the track element using
* ges_track_element_set_control_source(). The keys used in the returned
* hash table are the child property names that were passed to
* ges_track_element_set_control_source(), and their values are the
* corresponding created #GstControlBinding.
*
* Returns: (element-type gchar* GstControlBinding*)(transfer none): A
* hash table containing all child-property-name/control-binding pairs
* for @trackelement.
*/
GHashTable *
ges_track_element_get_all_control_bindings (GESTrackElement * trackelement)
{
GESTrackElementPrivate *priv = GES_TRACK_ELEMENT (trackelement)->priv;
return priv->bindings_hashtable;
}
/**
* ges_track_element_get_track:
* @object: A #GESTrackElement
*
* Get the #GESTrackElement:track for the element.
*
* Returns: (transfer none) (nullable): The track that @object belongs to,
* or %NULL if it does not belong to a track.
*/
GESTrack *
ges_track_element_get_track (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL);
return object->priv->track;
}
/**
* ges_track_element_get_gnlobject:
* @object: A #GESTrackElement
*
* Get the GNonLin object this object is controlling.
*
* Returns: (transfer none): The GNonLin object this object is controlling.
*
* Deprecated: use #ges_track_element_get_nleobject instead.
*/
GstElement *
ges_track_element_get_gnlobject (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL);
return object->priv->nleobject;
}
/**
* ges_track_element_get_nleobject:
* @object: A #GESTrackElement
*
* Get the nleobject that this element wraps.
*
* Returns: (transfer none): The nleobject that @object wraps.
*
* Since: 1.6
*/
GstElement *
ges_track_element_get_nleobject (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL);
return object->priv->nleobject;
}
/**
* ges_track_element_get_element:
* @object: A #GESTrackElement
*
* Get the #GstElement that the track element's underlying nleobject
* controls.
*
* Returns: (transfer none) (nullable): The #GstElement being controlled by the
* nleobject that @object wraps.
*/
GstElement *
ges_track_element_get_element (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL);
return object->priv->element;
}
/**
* ges_track_element_is_active:
* @object: A #GESTrackElement
*
* Gets #GESTrackElement:active for the element.
*
* Returns: %TRUE if @object is active in its track.
*/
gboolean
ges_track_element_is_active (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
g_return_val_if_fail (object->priv->nleobject, FALSE);
return object->active;
}
/**
* ges_track_element_has_internal_source:
* @object: A #GESTrackElement
*
* Gets #GESTrackElement:has-internal-source for the element.
*
* Returns: %TRUE if @object can have its 'internal time' properties set.
*
* Since: 1.18
*/
gboolean
ges_track_element_has_internal_source (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
return object->priv->has_internal_source;
}
/**
* ges_track_element_lookup_child:
* @object: Object to lookup the property in
* @prop_name: Name of the property to look up. You can specify the name of the
* class as such: "ClassName::property-name", to guarantee that you get the
* proper GParamSpec in case various GstElement-s contain the same property
* name. If you don't do so, you will get the first element found, having
* this property and the and the corresponding GParamSpec.
* @element: (out) (allow-none) (transfer full): pointer to a #GstElement that
* takes the real object to set property on
* @pspec: (out) (allow-none) (transfer full): pointer to take the specification
* describing the property
*
* Looks up which @element and @pspec would be effected by the given @name. If various
* contained elements have this property name you will get the first one, unless you
* specify the class name in @name.
*
* Returns: TRUE if @element and @pspec could be found. FALSE otherwise. In that
* case the values for @pspec and @element are not modified. Unref @element after
* usage.
*
* Deprecated: Use #ges_timeline_element_lookup_child
*/
gboolean
ges_track_element_lookup_child (GESTrackElement * object,
const gchar * prop_name, GstElement ** element, GParamSpec ** pspec)
{
return ges_timeline_element_lookup_child (GES_TIMELINE_ELEMENT (object),
prop_name, ((GObject **) element), pspec);
}
/**
* ges_track_element_set_child_property_by_pspec: (skip):
* @object: A #GESTrackElement
* @pspec: The #GParamSpec that specifies the property you want to set
* @value: The value
*
* Sets a property of a child of @object.
*
* Deprecated: Use #ges_timeline_element_set_child_property_by_spec
*/
void
ges_track_element_set_child_property_by_pspec (GESTrackElement * object,
GParamSpec * pspec, GValue * value)
{
g_return_if_fail (GES_IS_TRACK_ELEMENT (object));
ges_timeline_element_set_child_property_by_pspec (GES_TIMELINE_ELEMENT
(object), pspec, value);
return;
}
/**
* ges_track_element_set_child_property_valist: (skip):
* @object: The #GESTrackElement parent object
* @first_property_name: The name of the first property to set
* @var_args: Value for the first property, followed optionally by more
* name/return location pairs, followed by NULL
*
* Sets a property of a child of @object. If there are various child elements
* that have the same property name, you can distinguish them using the following
* syntax: 'ClasseName::property_name' as property name. If you don't, the
* corresponding property of the first element found will be set.
*
* Deprecated: Use #ges_timeline_element_set_child_property_valist
*/
void
ges_track_element_set_child_property_valist (GESTrackElement * object,
const gchar * first_property_name, va_list var_args)
{
ges_timeline_element_set_child_property_valist (GES_TIMELINE_ELEMENT (object),
first_property_name, var_args);
}
/**
* ges_track_element_set_child_properties: (skip):
* @object: The #GESTrackElement parent object
* @first_property_name: The name of the first property to set
* @...: value for the first property, followed optionally by more
* name/return location pairs, followed by NULL
*
* Sets a property of a child of @object. If there are various child elements
* that have the same property name, you can distinguish them using the following
* syntax: 'ClasseName::property_name' as property name. If you don't, the
* corresponding property of the first element found will be set.
*
* Deprecated: Use #ges_timeline_element_set_child_properties
*/
void
ges_track_element_set_child_properties (GESTrackElement * object,
const gchar * first_property_name, ...)
{
va_list var_args;
g_return_if_fail (GES_IS_TRACK_ELEMENT (object));
va_start (var_args, first_property_name);
ges_track_element_set_child_property_valist (object, first_property_name,
var_args);
va_end (var_args);
}
/**
* ges_track_element_get_child_property_valist: (skip):
* @object: The #GESTrackElement parent object
* @first_property_name: The name of the first property to get
* @var_args: Value for the first property, followed optionally by more
* name/return location pairs, followed by NULL
*
* Gets a property of a child of @object. If there are various child elements
* that have the same property name, you can distinguish them using the following
* syntax: 'ClasseName::property_name' as property name. If you don't, the
* corresponding property of the first element found will be set.
*
* Deprecated: Use #ges_timeline_element_get_child_property_valist
*/
void
ges_track_element_get_child_property_valist (GESTrackElement * object,
const gchar * first_property_name, va_list var_args)
{
ges_timeline_element_get_child_property_valist (GES_TIMELINE_ELEMENT (object),
first_property_name, var_args);
}
/**
* ges_track_element_list_children_properties:
* @object: The #GESTrackElement to get the list of children properties from
* @n_properties: (out): return location for the length of the returned array
*
* Gets an array of #GParamSpec* for all configurable properties of the
* children of @object.
*
* Returns: (transfer full) (array length=n_properties): An array of #GParamSpec* which should be freed after use or
* %NULL if something went wrong.
*
* Deprecated: Use #ges_timeline_element_list_children_properties
*/
GParamSpec **
ges_track_element_list_children_properties (GESTrackElement * object,
guint * n_properties)
{
return
ges_timeline_element_list_children_properties (GES_TIMELINE_ELEMENT
(object), n_properties);
}
/**
* ges_track_element_get_child_properties: (skip):
* @object: The origin #GESTrackElement
* @first_property_name: The name of the first property to get
* @...: return location for the first property, followed optionally by more
* name/return location pairs, followed by NULL
*
* Gets properties of a child of @object.
*
* Deprecated: Use #ges_timeline_element_get_child_properties
*/
void
ges_track_element_get_child_properties (GESTrackElement * object,
const gchar * first_property_name, ...)
{
va_list var_args;
g_return_if_fail (GES_IS_TRACK_ELEMENT (object));
va_start (var_args, first_property_name);
ges_track_element_get_child_property_valist (object, first_property_name,
var_args);
va_end (var_args);
}
/**
* ges_track_element_get_child_property_by_pspec: (skip):
* @object: A #GESTrackElement
* @pspec: The #GParamSpec that specifies the property you want to get
* @value: (out): return location for the value
*
* Gets a property of a child of @object.
*
* Deprecated: Use #ges_timeline_element_get_child_property_by_pspec
*/
void
ges_track_element_get_child_property_by_pspec (GESTrackElement * object,
GParamSpec * pspec, GValue * value)
{
ges_timeline_element_get_child_property_by_pspec (GES_TIMELINE_ELEMENT
(object), pspec, value);
}
/**
* ges_track_element_set_child_property: (skip):
* @object: The origin #GESTrackElement
* @property_name: The name of the property
* @value: The value
*
* Sets a property of a GstElement contained in @object.
*
* Note that #ges_track_element_set_child_property is really
* intended for language bindings, #ges_track_element_set_child_properties
* is much more convenient for C programming.
*
* Returns: %TRUE if the property was set, %FALSE otherwise.
*
* Deprecated: use #ges_timeline_element_set_child_property instead
*/
gboolean
ges_track_element_set_child_property (GESTrackElement * object,
const gchar * property_name, GValue * value)
{
return ges_timeline_element_set_child_property (GES_TIMELINE_ELEMENT (object),
property_name, value);
}
/**
* ges_track_element_get_child_property: (skip):
* @object: The origin #GESTrackElement
* @property_name: The name of the property
* @value: (out): return location for the property value, it will
* be initialized if it is initialized with 0
*
* In general, a copy is made of the property contents and
* the caller is responsible for freeing the memory by calling
* g_value_unset().
*
* Gets a property of a GstElement contained in @object.
*
* Note that #ges_track_element_get_child_property is really
* intended for language bindings, #ges_track_element_get_child_properties
* is much more convenient for C programming.
*
* Returns: %TRUE if the property was found, %FALSE otherwise.
*
* Deprecated: Use #ges_timeline_element_get_child_property
*/
gboolean
ges_track_element_get_child_property (GESTrackElement * object,
const gchar * property_name, GValue * value)
{
return ges_timeline_element_get_child_property (GES_TIMELINE_ELEMENT (object),
property_name, value);
}
void
ges_track_element_copy_properties (GESTimelineElement * element,
GESTimelineElement * elementcopy)
{
GParamSpec **specs;
guint n, n_specs;
GValue val = { 0 };
GESTrackElement *copy = GES_TRACK_ELEMENT (elementcopy);
specs =
ges_track_element_list_children_properties (GES_TRACK_ELEMENT (element),
&n_specs);
for (n = 0; n < n_specs; ++n) {
if ((specs[n]->flags & G_PARAM_READWRITE) != G_PARAM_READWRITE)
continue;
if (specs[n]->flags & G_PARAM_CONSTRUCT_ONLY)
continue;
g_value_init (&val, specs[n]->value_type);
ges_track_element_get_child_property_by_pspec (GES_TRACK_ELEMENT (element),
specs[n], &val);
ges_track_element_set_child_property_by_pspec (copy, specs[n], &val);
g_value_unset (&val);
}
g_free (specs);
}
void
ges_track_element_set_creator_asset (GESTrackElement * self,
GESAsset * creator_asset)
{
self->priv->creator_asset = creator_asset;
}
GESAsset *
ges_track_element_get_creator_asset (GESTrackElement * self)
{
return self->priv->creator_asset;
}
static void
_split_binding (GESTrackElement * element, GESTrackElement * new_element,
guint64 position, GstTimedValueControlSource * source,
GstTimedValueControlSource * new_source, gboolean absolute)
{
GstTimedValue *last_value = NULL;
gboolean past_position = FALSE;
GList *values, *tmp;
values =
gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE
(source));
for (tmp = values; tmp; tmp = tmp->next) {
GstTimedValue *value = tmp->data;
if (value->timestamp > position && !past_position) {
gfloat value_at_pos;
/* FIXME We should be able to use gst_control_source_get_value so
* all modes are handled. Right now that method only works if the value
* we are looking for is between two actual keyframes which is not enough
* in our case. bug #706621 */
value_at_pos =
interpolate_values_for_position (last_value, value, position,
absolute);
past_position = TRUE;
gst_timed_value_control_source_set (new_source, position, value_at_pos);
gst_timed_value_control_source_set (new_source, value->timestamp,
value->value);
gst_timed_value_control_source_unset (source, value->timestamp);
gst_timed_value_control_source_set (source, position, value_at_pos);
} else if (past_position) {
gst_timed_value_control_source_set (new_source, value->timestamp,
value->value);
gst_timed_value_control_source_unset (source, value->timestamp);
}
last_value = value;
}
g_list_free (values);
}
static void
_copy_binding (GESTrackElement * element, GESTrackElement * new_element,
guint64 position, GstTimedValueControlSource * source,
GstTimedValueControlSource * new_source, gboolean absolute)
{
GList *values, *tmp;
values =
gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE
(source));
for (tmp = values; tmp; tmp = tmp->next) {
GstTimedValue *value = tmp->data;
gst_timed_value_control_source_set (new_source, value->timestamp,
value->value);
}
g_list_free (values);
}
/* position == GST_CLOCK_TIME_NONE means that we do a simple copy
* other position means that the function will do a splitting
* and thus interpollate the values in the element and new_element
*/
void
ges_track_element_copy_bindings (GESTrackElement * element,
GESTrackElement * new_element, guint64 position)
{
GParamSpec **specs;
guint n, n_specs;
gboolean absolute;
GstControlBinding *binding;
GstTimedValueControlSource *source, *new_source;
specs =
ges_track_element_list_children_properties (GES_TRACK_ELEMENT (element),
&n_specs);
for (n = 0; n < n_specs; ++n) {
GstInterpolationMode mode;
binding = ges_track_element_get_control_binding (element, specs[n]->name);
if (!binding)
continue;
g_object_get (binding, "control-source", &source, "absolute", &absolute,
NULL);
if (!GST_IS_TIMED_VALUE_CONTROL_SOURCE (source)) {
GST_FIXME_OBJECT (element,
"Implement support for control source type: %s",
G_OBJECT_TYPE_NAME (source));
gst_object_unref (source);
continue;
}
g_object_get (source, "mode", &mode, NULL);
new_source =
GST_TIMED_VALUE_CONTROL_SOURCE (gst_interpolation_control_source_new
());
g_object_set (new_source, "mode", mode, NULL);
if (GST_CLOCK_TIME_IS_VALID (position))
_split_binding (element, new_element, position, source, new_source,
absolute);
else
_copy_binding (element, new_element, position, source, new_source,
absolute);
/* We only manage direct (absolute) bindings, see TODO in set_control_source */
if (absolute)
ges_track_element_set_control_source (new_element,
GST_CONTROL_SOURCE (new_source), specs[n]->name, "direct-absolute");
else
ges_track_element_set_control_source (new_element,
GST_CONTROL_SOURCE (new_source), specs[n]->name, "direct");
gst_object_unref (source);
gst_object_unref (new_source);
}
g_free (specs);
}
/**
* ges_track_element_edit:
* @object: The #GESTrackElement to edit
* @layers: (element-type GESLayer) (nullable): A whitelist of layers
* where the edit can be performed, %NULL allows all layers in the
* timeline
* @mode: The edit mode
* @edge: The edge of @object where the edit should occur
* @position: The edit position: a new location for the edge of @object
* (in nanoseconds)
*
* Edits the element within its track.
*
* Returns: %TRUE if the edit of @object completed, %FALSE on failure.
*
* Deprecated: 1.18: use #ges_timeline_element_edit instead.
*/
gboolean
ges_track_element_edit (GESTrackElement * object,
GList * layers, GESEditMode mode, GESEdge edge, guint64 position)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
return ges_timeline_element_edit (GES_TIMELINE_ELEMENT (object),
layers, -1, mode, edge, position);
}
/**
* ges_track_element_remove_control_binding:
* @object: A #GESTrackElement
* @property_name: The name of the child property to remove the control
* binding from
*
* Removes the #GstControlBinding that was created for the specified child
* property of the track element using
* ges_track_element_set_control_source(). The given @property_name must
* be the same name of the child property that was passed to
* ges_track_element_set_control_source().
*
* Returns: %TRUE if the control binding was removed from the specified
* child property of @object, or %FALSE if an error occurred.
*/
gboolean
ges_track_element_remove_control_binding (GESTrackElement * object,
const gchar * property_name)
{
GESTrackElementPrivate *priv;
GstControlBinding *binding;
GstObject *target;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
priv = GES_TRACK_ELEMENT (object)->priv;
binding =
(GstControlBinding *) g_hash_table_lookup (priv->bindings_hashtable,
property_name);
if (binding) {
g_object_get (binding, "object", &target, NULL);
GST_DEBUG_OBJECT (object, "Removing binding %p for property %s", binding,
property_name);
gst_object_ref (binding);
gst_object_remove_control_binding (target, binding);
g_signal_emit (object, ges_track_element_signals[CONTROL_BINDING_REMOVED],
0, binding);
gst_object_unref (target);
gst_object_unref (binding);
g_hash_table_remove (priv->bindings_hashtable, property_name);
return TRUE;
}
return FALSE;
}
/**
* ges_track_element_set_control_source:
* @object: A #GESTrackElement
* @source: The control source to bind the child property to
* @property_name: The name of the child property to control
* @binding_type: The type of binding to create ("direct" or
* "direct-absolute")
*
* Creates a #GstControlBinding for the specified child property of the
* track element using the given control source. The given @property_name
* should refer to an existing child property of the track element, as
* used in ges_timeline_element_lookup_child().
*
* If @binding_type is "direct", then the control binding is created with
* gst_direct_control_binding_new() using the given control source. If
* @binding_type is "direct-absolute", it is created with
* gst_direct_control_binding_new_absolute() instead.
*
* Returns: %TRUE if the specified child property could be bound to
* @source, or %FALSE if an error occurred.
*/
gboolean
ges_track_element_set_control_source (GESTrackElement * object,
GstControlSource * source,
const gchar * property_name, const gchar * binding_type)
{
gboolean ret = FALSE;
GESTrackElementPrivate *priv;
GstElement *element;
GstControlBinding *binding;
gboolean direct, direct_absolute;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
priv = GES_TRACK_ELEMENT (object)->priv;
if (G_UNLIKELY (!(GST_IS_CONTROL_SOURCE (source)))) {
GST_WARNING
("You need to provide a non-null control source to build a new control binding");
return FALSE;
}
if (!ges_track_element_lookup_child (object, property_name, &element, NULL)) {
GST_WARNING ("You need to provide a valid and controllable property name");
return FALSE;
}
/* TODO : update this according to new types of bindings */
direct = !g_strcmp0 (binding_type, "direct");
direct_absolute = !g_strcmp0 (binding_type, "direct-absolute");
if (!direct && !direct_absolute) {
GST_WARNING_OBJECT (object, "Binding type must be in "
"[direct, direct-absolute]");
goto done;
}
/* First remove existing binding */
if (ges_track_element_remove_control_binding (object, property_name))
GST_LOG_OBJECT (object, "Removed old binding for property %s",
property_name);
if (direct_absolute)
binding = gst_direct_control_binding_new_absolute (GST_OBJECT (element),
property_name, source);
else
binding = gst_direct_control_binding_new (GST_OBJECT (element),
property_name, source);
gst_object_add_control_binding (GST_OBJECT (element), binding);
/* FIXME: maybe we should force the
* "ChildTypeName:property-name"
* format convention for child property names in bindings_hashtable.
* Currently the table may also contain
* "property-name"
* as keys.
*/
g_hash_table_insert (priv->bindings_hashtable, g_strdup (property_name),
binding);
if (GST_IS_TIMED_VALUE_CONTROL_SOURCE (source)
&& priv->auto_clamp_control_sources) {
/* Make sure we have the control source used by the binding */
g_object_get (binding, "control-source", &source, NULL);
_update_control_source (GST_TIMED_VALUE_CONTROL_SOURCE (source),
direct_absolute, _INPOINT (object), priv->outpoint);
gst_object_unref (source);
}
g_signal_emit (object, ges_track_element_signals[CONTROL_BINDING_ADDED],
0, binding);
ret = TRUE;
done:
gst_object_unref (element);
return ret;
}
/**
* ges_track_element_get_control_binding:
* @object: A #GESTrackElement
* @property_name: The name of the child property to return the control
* binding of
*
* Gets the control binding that was created for the specified child
* property of the track element using
* ges_track_element_set_control_source(). The given @property_name must
* be the same name of the child property that was passed to
* ges_track_element_set_control_source().
*
* Returns: (transfer none) (nullable): The control binding that was
* created for the specified child property of @object, or %NULL if
* @property_name does not correspond to any control binding.
*/
GstControlBinding *
ges_track_element_get_control_binding (GESTrackElement * object,
const gchar * property_name)
{
GESTrackElementPrivate *priv;
GstControlBinding *binding;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL);
priv = GES_TRACK_ELEMENT (object)->priv;
binding =
(GstControlBinding *) g_hash_table_lookup (priv->bindings_hashtable,
property_name);
return binding;
}
/**
* ges_track_element_clamp_control_source:
* @object: A #GESTrackElement
* @property_name: The name of the child property to clamp the control
* source of
*
* Clamp the #GstTimedValueControlSource for the specified child property
* to lie between the #GESTimelineElement:in-point and out-point of the
* element. The out-point is the #GES_TIMELINE_ELEMENT_END of the element
* translated from the timeline coordinates to the internal source
* coordinates of the element.
*
* If the property does not have a #GstTimedValueControlSource set by
* ges_track_element_set_control_source(), nothing happens. Otherwise, if
* a timed value for the control source lies before the in-point of the
* element, or after its out-point, then it will be removed. At the
* in-point and out-point times, a new interpolated value will be placed.
*
* Since: 1.18
*/
void
ges_track_element_clamp_control_source (GESTrackElement * object,
const gchar * property_name)
{
GstControlBinding *binding;
GstControlSource *source;
gboolean absolute;
g_return_if_fail (GES_IS_TRACK_ELEMENT (object));
binding = ges_track_element_get_control_binding (object, property_name);
if (!binding)
return;
g_object_get (binding, "control-source", &source, "absolute", &absolute,
NULL);
if (!GST_IS_TIMED_VALUE_CONTROL_SOURCE (source)) {
gst_object_unref (source);
return;
}
_update_control_source (GST_TIMED_VALUE_CONTROL_SOURCE (source), absolute,
_INPOINT (object), object->priv->outpoint);
gst_object_unref (source);
}
/**
* ges_track_element_set_auto_clamp_control_sources:
* @object: A #GESTrackElement
* @auto_clamp: Whether to automatically clamp the control sources for the
* child properties of @object
*
* Sets #GESTrackElement:auto-clamp-control-sources. If set to %TRUE, this
* will immediately clamp all the control sources.
*
* Since: 1.18
*/
void
ges_track_element_set_auto_clamp_control_sources (GESTrackElement * object,
gboolean auto_clamp)
{
g_return_if_fail (GES_IS_TRACK_ELEMENT (object));
if (auto_clamp == object->priv->auto_clamp_control_sources)
return;
object->priv->auto_clamp_control_sources = auto_clamp;
if (auto_clamp)
_update_control_bindings (object, _INPOINT (object),
object->priv->outpoint);
g_object_notify_by_pspec (G_OBJECT (object),
properties[PROP_AUTO_CLAMP_CONTROL_SOURCES]);
}
/**
* ges_track_element_get_auto_clamp_control_sources:
* @object: A #GESTrackElement
*
* Gets #GESTrackElement:auto-clamp-control-sources.
*
* Returns: Whether the control sources for the child properties of
* @object are automatically clamped.
* Since: 1.18
*/
gboolean
ges_track_element_get_auto_clamp_control_sources (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
return object->priv->auto_clamp_control_sources;
}
void
ges_track_element_freeze_control_sources (GESTrackElement * object,
gboolean freeze)
{
object->priv->freeze_control_sources = freeze;
if (!freeze && object->priv->auto_clamp_control_sources)
_update_control_bindings (object, _INPOINT (object),
object->priv->outpoint);
}
/**
* ges_track_element_is_core:
* @object: A #GESTrackElement
*
* Get whether the given track element is a core track element. That is,
* it was created by the @create_track_elements #GESClipClass method for
* some #GESClip.
*
* Note that such a track element can only be added to a clip that shares
* the same #GESAsset as the clip that created it. For example, you are
* allowed to move core children between clips that resulted from
* ges_container_ungroup(), but you could not move the core child from a
* #GESUriClip to a #GESTitleClip or another #GESUriClip with a different
* #GESUriClip:uri.
*
* Moreover, if a core track element is added to a clip, it will always be
* added as a core child. Therefore, if this returns %TRUE, then @element
* will be a core child of its parent clip.
*
* Returns: %TRUE if @element is a core track element.
* Since: 1.18
*/
gboolean
ges_track_element_is_core (GESTrackElement * object)
{
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
return (ges_track_element_get_creator_asset (object) != NULL);
}
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