gstreamer/ges/ges-track-object.c

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/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
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*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:ges-track-object
* @short_description: Base Class for objects contained in a #GESTrack
*
* #GESTrackObject is the Base Class for any object that can be contained in a
* #GESTrack.
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*
* It contains the basic information as to the location of the object within
* its container, like the start position, the in-point, the duration and the
* priority.
*/
#include "ges-internal.h"
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#include "ges-track-object.h"
#include "ges-timeline-object.h"
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G_DEFINE_ABSTRACT_TYPE (GESTrackObject, ges_track_object,
G_TYPE_INITIALLY_UNOWNED);
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struct _GESTrackObjectPrivate
{
/* These fields are only used before the gnlobject is available */
guint64 pending_start;
guint64 pending_inpoint;
guint64 pending_duration;
guint32 pending_priority;
gboolean pending_active;
GstElement *gnlobject; /* The GnlObject */
GstElement *element; /* The element contained in the gnlobject (can be NULL) */
GESTimelineObject *timelineobj;
GESTrack *track;
gboolean valid;
gboolean locked; /* If TRUE, then moves in sync with its controlling
* GESTimelineObject */
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};
enum
{
PROP_0,
PROP_START,
PROP_INPOINT,
PROP_DURATION,
PROP_PRIORITY,
PROP_ACTIVE,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static GstElement *ges_track_object_create_gnl_object_func (GESTrackObject *
object);
static void gnlobject_start_cb (GstElement * gnlobject, GParamSpec * arg
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G_GNUC_UNUSED, GESTrackObject * obj);
static void gnlobject_media_start_cb (GstElement * gnlobject, GParamSpec * arg
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G_GNUC_UNUSED, GESTrackObject * obj);
static void gnlobject_priority_cb (GstElement * gnlobject, GParamSpec * arg
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G_GNUC_UNUSED, GESTrackObject * obj);
static void gnlobject_duration_cb (GstElement * gnlobject, GParamSpec * arg
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G_GNUC_UNUSED, GESTrackObject * obj);
static void gnlobject_active_cb (GstElement * gnlobject, GParamSpec * arg
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G_GNUC_UNUSED, GESTrackObject * obj);
static inline gboolean
ges_track_object_set_start_internal (GESTrackObject * object, guint64 start);
static inline gboolean
ges_track_object_set_inpoint_internal (GESTrackObject * object,
guint64 inpoint);
static inline gboolean ges_track_object_set_duration_internal (GESTrackObject *
object, guint64 duration);
static inline gboolean ges_track_object_set_priority_internal (GESTrackObject *
object, guint32 priority);
static void
ges_track_object_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTrackObject *tobj = GES_TRACK_OBJECT (object);
switch (property_id) {
case PROP_START:
g_value_set_uint64 (value, tobj->start);
break;
case PROP_INPOINT:
g_value_set_uint64 (value, tobj->inpoint);
break;
case PROP_DURATION:
g_value_set_uint64 (value, tobj->duration);
break;
case PROP_PRIORITY:
g_value_set_uint (value, tobj->priority);
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break;
case PROP_ACTIVE:
g_value_set_boolean (value, tobj->active);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_object_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTrackObject *tobj = GES_TRACK_OBJECT (object);
switch (property_id) {
case PROP_START:
ges_track_object_set_start_internal (tobj, g_value_get_uint64 (value));
break;
case PROP_INPOINT:
ges_track_object_set_inpoint_internal (tobj, g_value_get_uint64 (value));
break;
case PROP_DURATION:
ges_track_object_set_duration_internal (tobj, g_value_get_uint64 (value));
break;
case PROP_PRIORITY:
ges_track_object_set_priority_internal (tobj, g_value_get_uint (value));
break;
case PROP_ACTIVE:
ges_track_object_set_active (tobj, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_object_dispose (GObject * object)
{
G_OBJECT_CLASS (ges_track_object_parent_class)->dispose (object);
}
static void
ges_track_object_finalize (GObject * object)
{
G_OBJECT_CLASS (ges_track_object_parent_class)->finalize (object);
}
static void
ges_track_object_class_init (GESTrackObjectClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GESTrackObjectPrivate));
object_class->get_property = ges_track_object_get_property;
object_class->set_property = ges_track_object_set_property;
object_class->dispose = ges_track_object_dispose;
object_class->finalize = ges_track_object_finalize;
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/**
* GESTrackObject:start
*
* The position of the object in the container #GESTrack (in nanoseconds).
*/
properties[PROP_START] = g_param_spec_uint64 ("start", "Start",
"The position in the container", 0, G_MAXUINT64, 0, G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_START,
properties[PROP_START]);
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/**
* GESTrackObject:in-point
*
* The in-point at which this #GESTrackObject will start outputting data
* from its contents (in nanoseconds).
*
* Ex : an in-point of 5 seconds means that the first outputted buffer will
* be the one located 5 seconds in the controlled resource.
*/
properties[PROP_INPOINT] =
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g_param_spec_uint64 ("in-point", "In-point", "The in-point", 0,
G_MAXUINT64, 0, G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_INPOINT,
properties[PROP_INPOINT]);
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/**
* GESTrackObject:duration
*
* The duration (in nanoseconds) which will be used in the container #GESTrack
* starting from 'in-point'.
*
*/
properties[PROP_DURATION] =
g_param_spec_uint64 ("duration", "Duration", "The duration to use", 0,
G_MAXUINT64, GST_SECOND, G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_DURATION,
properties[PROP_DURATION]);
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/**
* GESTrackObject:priority
*
* The priority of the object within the containing #GESTrack.
* If two objects intersect over the same region of time, the @priority
* property is used to decide which one takes precedence.
*
* The highest priority (that supercedes everything) is 0, and then lowering
* priorities go in increasing numerical value (with #G_MAXUINT64 being the
* lowest priority).
*/
properties[PROP_PRIORITY] = g_param_spec_uint ("priority", "Priority",
"The priority of the object", 0, G_MAXUINT, 0, G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_PRIORITY,
properties[PROP_PRIORITY]);
/**
* GESTrackObject:active
*
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* Whether the object should be taken into account in the #GESTrack output.
* If #FALSE, then its contents will not be used in the resulting track.
*/
properties[PROP_ACTIVE] =
g_param_spec_boolean ("active", "Active", "Use object in output", TRUE,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ACTIVE,
properties[PROP_ACTIVE]);
klass->create_gnl_object = ges_track_object_create_gnl_object_func;
}
static void
ges_track_object_init (GESTrackObject * self)
{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_TRACK_OBJECT, GESTrackObjectPrivate);
/* Sane default values */
self->priv->pending_start = 0;
self->priv->pending_inpoint = 0;
self->priv->pending_duration = GST_SECOND;
self->priv->pending_priority = 1;
self->priv->pending_active = TRUE;
self->priv->locked = TRUE;
}
static inline gboolean
ges_track_object_set_start_internal (GESTrackObject * object, guint64 start)
{
GST_DEBUG ("object:%p, start:%" GST_TIME_FORMAT,
object, GST_TIME_ARGS (start));
if (object->priv->gnlobject != NULL) {
if (G_UNLIKELY (start == object->start))
return FALSE;
g_object_set (object->priv->gnlobject, "start", start, NULL);
} else
object->priv->pending_start = start;
return TRUE;
};
/**
* ges_track_object_set_start:
* @object: a #GESTrackObject
* @start: the start position (in #GstClockTime)
*
* Sets the position of the object in the container #GESTrack.
*/
void
ges_track_object_set_start (GESTrackObject * object, guint64 start)
{
if (ges_track_object_set_start_internal (object, start))
#if GLIB_CHECK_VERSION(2,26,0)
g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_START]);
#else
g_object_notify (G_OBJECT (object), "start");
#endif
}
static inline gboolean
ges_track_object_set_inpoint_internal (GESTrackObject * object, guint64 inpoint)
{
GST_DEBUG ("object:%p, inpoint:%" GST_TIME_FORMAT,
object, GST_TIME_ARGS (inpoint));
if (object->priv->gnlobject != NULL) {
if (G_UNLIKELY (inpoint == object->inpoint))
return FALSE;
g_object_set (object->priv->gnlobject, "media-start", inpoint, NULL);
} else
object->priv->pending_inpoint = inpoint;
return TRUE;
}
/**
* ges_track_object_set_inpoint:
* @object: a #GESTrackObject
* @inpoint: the in-point (in #GstClockTime)
*
* Set the offset within the contents of this #GESTrackObject
*/
void
ges_track_object_set_inpoint (GESTrackObject * object, guint64 inpoint)
{
if (ges_track_object_set_inpoint_internal (object, inpoint))
#if GLIB_CHECK_VERSION(2,26,0)
g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_INPOINT]);
#else
g_object_notify (G_OBJECT (object), "in-point");
#endif
}
static inline gboolean
ges_track_object_set_duration_internal (GESTrackObject * object,
guint64 duration)
{
GST_DEBUG ("object:%p, duration:%" GST_TIME_FORMAT,
object, GST_TIME_ARGS (duration));
if (object->priv->gnlobject != NULL) {
if (G_UNLIKELY (duration == object->duration))
return FALSE;
g_object_set (object->priv->gnlobject, "duration", duration,
"media-duration", duration, NULL);
} else
object->priv->pending_duration = duration;
return TRUE;
}
/**
* ges_track_object_set_duration:
* @object: a #GESTrackObject
* @duration: the duration (in #GstClockTime)
*
* Set the duration which will be used in the container #GESTrack
* starting from the 'in-point'
*/
void
ges_track_object_set_duration (GESTrackObject * object, guint64 duration)
{
if (ges_track_object_set_duration_internal (object, duration))
#if GLIB_CHECK_VERSION(2,26,0)
g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_DURATION]);
#else
g_object_notify (G_OBJECT (object), "duration");
#endif
}
static inline gboolean
ges_track_object_set_priority_internal (GESTrackObject * object,
guint32 priority)
{
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GST_DEBUG ("object:%p, priority:%" G_GUINT32_FORMAT, object, priority);
if (object->priv->gnlobject != NULL) {
if (G_UNLIKELY (priority == object->priority))
return FALSE;
g_object_set (object->priv->gnlobject, "priority", priority, NULL);
} else
object->priv->pending_priority = priority;
return TRUE;
}
/**
* ges_track_object_set_priority:
* @object: a #GESTrackObject
* @priority: the priority
*
* Sets the priority of the object withing the containing #GESTrack.
* If two objects intersect over the same region of time, the priority
* property is used to decide which one takes precedence.
*
* The highest priority (that supercedes everything) is 0, and then
* lowering priorities go in increasing numerical value (with G_MAXUINT32
* being the lowest priority).
*/
void
ges_track_object_set_priority (GESTrackObject * object, guint32 priority)
{
if (ges_track_object_set_priority_internal (object, priority))
#if GLIB_CHECK_VERSION(2,26,0)
g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_PRIORITY]);
#else
g_object_notify (G_OBJECT (object), "priority");
#endif
}
/**
* ges_track_object_set_active:
* @object: a #GESTrackObject
* @active: visibility
*
* Sets the usage of the @object. If @active is %TRUE, the object will be used for
* playback and rendering, else it will be ignored.
*
* Returns: %TRUE if the property was toggled, else %FALSE
*/
gboolean
ges_track_object_set_active (GESTrackObject * object, gboolean active)
{
GST_DEBUG ("object:%p, active:%d", object, active);
if (object->priv->gnlobject != NULL) {
if (G_UNLIKELY (active == object->active))
return FALSE;
g_object_set (object->priv->gnlobject, "active", active, NULL);
} else
object->priv->pending_active = active;
return TRUE;
}
/* Callbacks from the GNonLin object */
static void
gnlobject_start_cb (GstElement * gnlobject, GParamSpec * arg G_GNUC_UNUSED,
GESTrackObject * obj)
{
guint64 start;
GESTrackObjectClass *klass;
klass = GES_TRACK_OBJECT_GET_CLASS (obj);
g_object_get (gnlobject, "start", &start, NULL);
GST_DEBUG ("gnlobject start : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (start), GST_TIME_ARGS (obj->start));
if (start != obj->start) {
obj->start = start;
if (klass->start_changed)
klass->start_changed (obj, start);
}
}
/* Callbacks from the GNonLin object */
static void
gnlobject_media_start_cb (GstElement * gnlobject,
GParamSpec * arg G_GNUC_UNUSED, GESTrackObject * obj)
{
guint64 start;
GESTrackObjectClass *klass;
klass = GES_TRACK_OBJECT_GET_CLASS (obj);
g_object_get (gnlobject, "media-start", &start, NULL);
GST_DEBUG ("gnlobject in-point : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (start), GST_TIME_ARGS (obj->inpoint));
if (start != obj->inpoint) {
obj->inpoint = start;
if (klass->media_start_changed)
klass->media_start_changed (obj, start);
}
}
static void
gnlobject_priority_cb (GstElement * gnlobject, GParamSpec * arg G_GNUC_UNUSED,
GESTrackObject * obj)
{
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guint32 priority;
GESTrackObjectClass *klass;
klass = GES_TRACK_OBJECT_GET_CLASS (obj);
g_object_get (gnlobject, "priority", &priority, NULL);
GST_DEBUG ("gnlobject priority : %d current : %d", priority, obj->priority);
if (priority != obj->priority) {
obj->priority = priority;
if (klass->gnl_priority_changed)
klass->gnl_priority_changed (obj, priority);
}
}
static void
gnlobject_duration_cb (GstElement * gnlobject, GParamSpec * arg G_GNUC_UNUSED,
GESTrackObject * obj)
{
guint64 duration;
GESTrackObjectClass *klass;
klass = GES_TRACK_OBJECT_GET_CLASS (obj);
g_object_get (gnlobject, "duration", &duration, NULL);
GST_DEBUG ("gnlobject duration : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (duration), GST_TIME_ARGS (obj->duration));
if (duration != obj->duration) {
obj->duration = duration;
if (klass->duration_changed)
klass->duration_changed (obj, duration);
}
}
static void
gnlobject_active_cb (GstElement * gnlobject, GParamSpec * arg G_GNUC_UNUSED,
GESTrackObject * obj)
{
gboolean active;
GESTrackObjectClass *klass;
klass = GES_TRACK_OBJECT_GET_CLASS (obj);
g_object_get (gnlobject, "active", &active, NULL);
GST_DEBUG ("gnlobject active : %d current : %d", active, obj->active);
if (active != obj->active) {
obj->active = active;
if (klass->active_changed)
klass->active_changed (obj, active);
}
}
/* default 'create_gnl_object' virtual method implementation */
static GstElement *
ges_track_object_create_gnl_object_func (GESTrackObject * self)
{
GESTrackObjectClass *klass = NULL;
GstElement *child = NULL;
GstElement *gnlobject;
klass = GES_TRACK_OBJECT_GET_CLASS (self);
if (G_UNLIKELY (self->priv->gnlobject != NULL))
goto already_have_gnlobject;
if (G_UNLIKELY (klass->gnlobject_factorytype == NULL))
goto no_gnlfactory;
GST_DEBUG ("Creating a supporting gnlobject of type '%s'",
klass->gnlobject_factorytype);
gnlobject = gst_element_factory_make (klass->gnlobject_factorytype, NULL);
if (G_UNLIKELY (gnlobject == NULL))
goto no_gnlobject;
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 (gnlobject), child))
goto add_failure;
GST_DEBUG ("Succesfully got the element to put in the gnlobject");
self->priv->element = child;
}
GST_DEBUG ("done");
return gnlobject;
/* ERROR CASES */
already_have_gnlobject:
{
GST_ERROR ("Already controlling a GnlObject %s",
GST_ELEMENT_NAME (self->priv->gnlobject));
return NULL;
}
no_gnlfactory:
{
GST_ERROR ("No GESTrackObject::gnlobject_factorytype implementation!");
return NULL;
}
no_gnlobject:
{
GST_ERROR ("Error creating a gnlobject of type '%s'",
klass->gnlobject_factorytype);
return NULL;
}
child_failure:
{
GST_ERROR ("create_element returned NULL");
gst_object_unref (gnlobject);
return NULL;
}
add_failure:
{
GST_ERROR ("Error adding the contents to the gnlobject");
gst_object_unref (child);
gst_object_unref (gnlobject);
return NULL;
}
}
static gboolean
ensure_gnl_object (GESTrackObject * object)
{
GESTrackObjectClass *class;
GstElement *gnlobject;
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gboolean res = FALSE;
if (object->priv->gnlobject && object->priv->valid)
return FALSE;
/* 1. Create the GnlObject */
GST_DEBUG ("Creating GnlObject");
class = GES_TRACK_OBJECT_GET_CLASS (object);
if (G_UNLIKELY (class->create_gnl_object == NULL)) {
GST_ERROR ("No 'create_gnl_object' implementation !");
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goto done;
}
GST_DEBUG ("Calling virtual method");
/* call the create_gnl_object virtual method */
gnlobject = class->create_gnl_object (object);
if (G_UNLIKELY (gnlobject == NULL)) {
GST_ERROR
("'create_gnl_object' implementation returned TRUE but no GnlObject is available");
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goto done;
}
object->priv->gnlobject = gnlobject;
/* 2. Fill in the GnlObject */
if (gnlobject) {
GST_DEBUG ("Got a valid GnlObject, now filling it in");
res =
ges_timeline_object_fill_track_object (object->priv->timelineobj,
object, object->priv->gnlobject);
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if (res) {
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/* Connect to property notifications */
/* FIXME : remember the signalids so we can remove them later on !!! */
g_signal_connect (G_OBJECT (object->priv->gnlobject), "notify::start",
G_CALLBACK (gnlobject_start_cb), object);
g_signal_connect (G_OBJECT (object->priv->gnlobject),
"notify::media-start", G_CALLBACK (gnlobject_media_start_cb), object);
g_signal_connect (G_OBJECT (object->priv->gnlobject), "notify::duration",
G_CALLBACK (gnlobject_duration_cb), object);
g_signal_connect (G_OBJECT (object->priv->gnlobject), "notify::priority",
G_CALLBACK (gnlobject_priority_cb), object);
g_signal_connect (G_OBJECT (object->priv->gnlobject), "notify::active",
G_CALLBACK (gnlobject_active_cb), object);
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/* Set some properties on the GnlObject */
g_object_set (object->priv->gnlobject,
"caps", ges_track_get_caps (object->priv->track),
"duration", object->priv->pending_duration,
"media-duration", object->priv->pending_duration,
"start", object->priv->pending_start,
"media-start", object->priv->pending_inpoint,
"priority", object->priv->pending_priority,
"active", object->priv->pending_active, NULL);
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}
}
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done:
object->priv->valid = res;
GST_DEBUG ("Returning res:%d", res);
return res;
}
/* INTERNAL USAGE */
gboolean
ges_track_object_set_track (GESTrackObject * object, GESTrack * track)
{
GST_DEBUG ("object:%p, track:%p", object, track);
object->priv->track = track;
if (object->priv->track)
return ensure_gnl_object (object);
return TRUE;
}
/**
* ges_track_object_get_track:
* @object: a #GESTrackObject
*
* Get the #GESTrack to which this object belongs.
*
* Returns: (transfer none): The #GESTrack to which this object belongs. Can be %NULL if it
* is not in any track
*/
GESTrack *
ges_track_object_get_track (GESTrackObject * object)
{
g_return_val_if_fail (GES_IS_TRACK_OBJECT (object), NULL);
return object->priv->track;
}
void
ges_track_object_set_timeline_object (GESTrackObject * object,
GESTimelineObject * tlobj)
{
GST_DEBUG ("object:%p, timeline-object:%p", object, tlobj);
object->priv->timelineobj = tlobj;
}
/**
* ges_track_object_get_timeline_object:
* @object: a #GESTrackObject
*
* Get the #GESTimelineObject which is controlling this track object
*
* Returns: (transfer none): the #GESTimelineObject which is controlling
* this track object
*/
GESTimelineObject *
ges_track_object_get_timeline_object (GESTrackObject * object)
{
g_return_val_if_fail (GES_IS_TRACK_OBJECT (object), NULL);
return object->priv->timelineobj;
}
/**
* ges_track_object_get_gnlobject:
* @object: a #GESTrackObject
*
* Get the GNonLin object this object is controlling.
*
* Returns: (transfer none): the GNonLin object this object is controlling.
*/
GstElement *
ges_track_object_get_gnlobject (GESTrackObject * object)
{
return object->priv->gnlobject;
}
/**
* ges_track_object_get_element:
* @object: a #GESTrackObject
*
* Get the #GstElement this track object is controlling within GNonLin.
*
* Returns: (transfer none): the #GstElement this track object is controlling
* within GNonLin.
*/
GstElement *
ges_track_object_get_element (GESTrackObject * object)
{
return object->priv->element;
}
/**
* ges_track_object_set_locked:
* @object: a #GESTrackObject
* @locked: whether the object is lock to its parent
*
* Set the locking status of the @object in relationship to its controlling
* #GESTimelineObject. If @locked is %TRUE, then this object will move synchronously
* with its controlling #GESTimelineObject.
*/
void
ges_track_object_set_locked (GESTrackObject * object, gboolean locked)
{
object->priv->locked = locked;
}
/**
* ges_track_object_is_locked:
* @object: a #GESTrackObject
*
* Let you know if object us locked or not (moving synchronously).
*
* Returns: %TRUE if the object is moving synchronously to its controlling
* #GESTimelineObject, else %FALSE.
*/
gboolean
ges_track_object_is_locked (GESTrackObject * object)
{
return object->priv->locked;
}