gstreamer/ges/ges-track-object.c
2010-09-02 17:55:20 +02:00

585 lines
16 KiB
C

/* 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., 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.
*
* 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"
#include "ges-track-object.h"
#include "ges-timeline-object.h"
static GQuark _start_quark;
static GQuark _inpoint_quark;
static GQuark _duration_quark;
static GQuark _priority_quark;
#define _do_init \
{ \
_start_quark = g_quark_from_static_string ("start"); \
_inpoint_quark = g_quark_from_static_string ("inpoint"); \
_duration_quark = g_quark_from_static_string ("duration"); \
_priority_quark = g_quark_from_static_string ("priority"); \
}
G_DEFINE_TYPE_WITH_CODE (GESTrackObject, ges_track_object, G_TYPE_OBJECT,
_do_init);
enum
{
PROP_0,
PROP_START,
PROP_INPOINT,
PROP_DURATION,
PROP_PRIORITY,
PROP_PRIORITY_OFFSET,
PROP_ACTIVE
};
static gboolean
ges_track_object_create_gnl_object_func (GESTrackObject * object);
void gnlobject_start_cb (GstElement * gnlobject, GParamSpec * arg
G_GNUC_UNUSED, GESTrackObject * obj);
void gnlobject_media_start_cb (GstElement * gnlobject, GParamSpec * arg
G_GNUC_UNUSED, GESTrackObject * obj);
void gnlobject_priority_cb (GstElement * gnlobject, GParamSpec * arg
G_GNUC_UNUSED, GESTrackObject * obj);
void gnlobject_duration_cb (GstElement * gnlobject, GParamSpec * arg
G_GNUC_UNUSED, GESTrackObject * obj);
void gnlobject_active_cb (GstElement * gnlobject, GParamSpec * arg
G_GNUC_UNUSED, GESTrackObject * obj);
static gboolean ges_track_object_update_priority (GESTrackObject * object);
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->base_priority);
break;
case PROP_PRIORITY_OFFSET:
g_value_set_uint (value, tobj->priority_offset);
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_PRIORITY_OFFSET:
ges_track_object_set_priority_offset_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);
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;
/**
* GESTrackObject:start
*
* The position of the object in the container #GESTrack (in nanoseconds).
*/
g_object_class_install_property (object_class, PROP_START,
g_param_spec_uint64 ("start", "Start",
"The position in the container", 0, G_MAXUINT64, 0,
G_PARAM_READWRITE));
/**
* 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.
*/
g_object_class_install_property (object_class, PROP_INPOINT,
g_param_spec_uint64 ("in-point", "In-point", "The in-point", 0,
G_MAXUINT64, 0, G_PARAM_READWRITE));
/**
* GESTrackObject:duration
*
* The duration (in nanoseconds) which will be used in the container #GESTrack
* starting from 'in-point'.
*
*/
g_object_class_install_property (object_class, PROP_DURATION,
g_param_spec_uint64 ("duration", "Duration", "The duration to use",
0, G_MAXUINT64, GST_SECOND, G_PARAM_READWRITE));
/**
* 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).
*/
g_object_class_install_property (object_class, PROP_PRIORITY,
g_param_spec_uint ("priority", "Priority",
"The priority of the object", 0, G_MAXUINT, 0, G_PARAM_READWRITE));
/**
* GESTrackObject:priority-offset
*
* The priority of the object relative to its parent track object.
*/
g_object_class_install_property (object_class, PROP_PRIORITY_OFFSET,
g_param_spec_uint ("priority-offset", "Priority Offset",
"An offset from the base priority", 0, G_MAXUINT, 0,
G_PARAM_READWRITE));
/**
* GESTrackObject:active
*
* 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.
*/
g_object_class_install_property (object_class, PROP_ACTIVE,
g_param_spec_boolean ("active", "Active", "Use object in output",
TRUE, G_PARAM_READWRITE));
klass->create_gnl_object = ges_track_object_create_gnl_object_func;
}
static void
ges_track_object_init (GESTrackObject * self)
{
/* Sane default values */
self->pending_start = 0;
self->pending_inpoint = 0;
self->pending_duration = GST_SECOND;
self->pending_gnl_priority = 1;
self->pending_active = TRUE;
}
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->gnlobject != NULL) {
if (G_UNLIKELY (start == object->start))
return FALSE;
g_object_set (object->gnlobject, "start", start, NULL);
} else
object->pending_start = start;
return TRUE;
};
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->gnlobject != NULL) {
if (G_UNLIKELY (inpoint == object->inpoint))
return FALSE;
g_object_set (object->gnlobject, "media-start", inpoint, NULL);
} else
object->pending_inpoint = inpoint;
return TRUE;
}
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->gnlobject != NULL) {
if (G_UNLIKELY (duration == object->duration))
return FALSE;
g_object_set (object->gnlobject, "duration", duration, "media-duration",
duration, NULL);
} else
object->pending_duration = duration;
return TRUE;
}
/* NOTE: we handle priority differently than other properties! the gnlpriority
* is object->base_priority + object->priority_offset! A change to either one
* will trigger an update to the gnonlin priority and a subsequent property
* notification.
*/
gboolean
ges_track_object_set_priority_internal (GESTrackObject * object,
guint32 priority)
{
guint32 save;
save = object->base_priority;
GST_DEBUG ("object:%p, priority:%d", object, priority);
object->base_priority = priority;
if (!ges_track_object_update_priority (object)) {
object->base_priority = save;
return FALSE;
}
return TRUE;
}
gboolean
ges_track_object_set_priority_offset_internal (GESTrackObject * object,
guint32 priority_offset)
{
guint32 save;
save = object->priority_offset;
GST_DEBUG ("object:%p, offset:%d", object, priority_offset);
object->priority_offset = priority_offset;
if (!ges_track_object_update_priority (object)) {
object->base_priority = save;
return FALSE;
}
return TRUE;
}
static gboolean
ges_track_object_update_priority (GESTrackObject * object)
{
guint32 priority, offset, gnl;
priority = object->base_priority;
offset = object->priority_offset;
gnl = priority + offset;
GST_DEBUG ("object:%p, base:%d, offset:%d: gnl:%d", object, priority, offset,
gnl);
if (object->gnlobject != NULL) {
if (G_UNLIKELY (gnl == object->gnl_priority))
return FALSE;
g_object_set (object->gnlobject, "priority", gnl, NULL);
} else
object->pending_gnl_priority = gnl;
return TRUE;
}
gboolean
ges_track_object_set_active (GESTrackObject * object, gboolean active)
{
GST_DEBUG ("object:%p, active:%d", object, active);
if (object->gnlobject != NULL) {
if (G_UNLIKELY (active == object->active))
return FALSE;
g_object_set (object->gnlobject, "active", active, NULL);
} else
object->pending_active = active;
return TRUE;
}
/* Callbacks from the GNonLin object */
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);
/* FIXME : emit changed */
}
}
/* Callbacks from the GNonLin object */
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);
/* FIXME : emit changed */
}
}
void
gnlobject_priority_cb (GstElement * gnlobject, GParamSpec * arg G_GNUC_UNUSED,
GESTrackObject * obj)
{
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->gnl_priority);
if (priority != obj->gnl_priority) {
obj->gnl_priority = priority;
if (klass->gnl_priority_changed)
klass->gnl_priority_changed (obj, priority);
/* FIXME : emit changed */
}
}
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);
/* FIXME : emit changed */
}
}
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);
/* FIXME : emit changed */
}
}
/* default 'create_gnl_object' virtual method implementation */
static gboolean
ges_track_object_create_gnl_object_func (GESTrackObject * object)
{
return FALSE;
}
static gboolean
ensure_gnl_object (GESTrackObject * object)
{
GESTrackObjectClass *class;
gboolean res;
if (object->gnlobject && object->valid)
return TRUE;
/* 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 !");
return FALSE;
}
GST_DEBUG ("Calling virtual method");
/* call the create_gnl_object virtual method */
res = class->create_gnl_object (object);
if (G_UNLIKELY (res && (object->gnlobject == NULL))) {
GST_ERROR
("'create_gnl_object' implementation returned TRUE but no GnlObject is available");
return FALSE;
}
/* Connect to property notifications */
g_signal_connect (G_OBJECT (object->gnlobject), "notify::start",
G_CALLBACK (gnlobject_start_cb), object);
g_signal_connect (G_OBJECT (object->gnlobject), "notify::media-start",
G_CALLBACK (gnlobject_media_start_cb), object);
g_signal_connect (G_OBJECT (object->gnlobject), "notify::duration",
G_CALLBACK (gnlobject_duration_cb), object);
g_signal_connect (G_OBJECT (object->gnlobject), "notify::priority",
G_CALLBACK (gnlobject_priority_cb), object);
g_signal_connect (G_OBJECT (object->gnlobject), "notify::active",
G_CALLBACK (gnlobject_active_cb), object);
/* 2. Fill in the GnlObject */
if (res) {
GST_DEBUG ("Got a valid GnlObject, now filling it in");
res =
ges_timeline_object_fill_track_object (object->timelineobj, object,
object->gnlobject);
if (res) {
/* Set some properties on the GnlObject */
g_object_set (object->gnlobject,
"caps", object->track->caps,
"duration", object->pending_duration,
"media-duration", object->pending_duration,
"start", object->pending_start,
"media-start", object->pending_inpoint,
"priority", object->pending_gnl_priority,
"active", object->pending_active, NULL);
}
}
object->valid = res;
GST_DEBUG ("Returning res:%d", res);
return res;
}
gboolean
ges_track_object_set_track (GESTrackObject * object, GESTrack * track)
{
GST_DEBUG ("object:%p, track:%p", object, track);
object->track = track;
if (object->track)
return ensure_gnl_object (object);
return TRUE;
}
void
ges_track_object_set_timeline_object (GESTrackObject * object,
GESTimelineObject * tlobj)
{
GST_DEBUG ("object:%p, timeline-object:%p", object, tlobj);
object->timelineobj = tlobj;
}