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/*
Copyright (C) 2009-2010 George Kiagiadakis <kiagiadakis.george@gmail.com>
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "caps.h"
#include "structure.h"
#include "../QGlib/string_p.h"
#include "objectstore_p.h"
#include <QtCore/QDebug>
#include <gst/gstcaps.h>
#include <gst/gstvalue.h>
namespace QGst {
//static
CapsPtr Caps::createSimple(const char *mediaType)
{
return CapsPtr::wrap(gst_caps_new_simple(mediaType, NULL), false);
}
//static
CapsPtr Caps::createAny()
{
return CapsPtr::wrap(gst_caps_new_any(), false);
}
//static
CapsPtr Caps::createEmpty()
{
return CapsPtr::wrap(gst_caps_new_empty(), false);
}
//static
CapsPtr Caps::fromString(const char *string)
{
return CapsPtr::wrap(gst_caps_from_string(string), false);
}
QString Caps::toString() const
{
return QGlib::Private::stringFromGCharPtr(gst_caps_to_string(object<GstCaps>()));
}
void Caps::append(const CapsPtr & caps2)
{
gst_caps_append(object<GstCaps>(), gst_caps_copy(caps2));
}
void Caps::merge(const CapsPtr & caps2)
{
gst_caps_merge(object<GstCaps>(), gst_caps_copy(caps2));
}
void Caps::setValue(const char *field, const QGlib::Value & value)
{
gst_caps_set_value(object<GstCaps>(), field, value);
}
bool Caps::simplify()
{
return gst_caps_do_simplify(object<GstCaps>());
}
void Caps::truncate()
{
gst_caps_truncate(object<GstCaps>());
}
StructurePtr Caps::internalStructure(uint index)
{
return StructurePtr(new SharedStructure(gst_caps_get_structure(object<GstCaps>(), index)));
}
const StructurePtr Caps::internalStructure(uint index) const
{
return StructurePtr(new SharedStructure(gst_caps_get_structure(object<GstCaps>(), index)));
}
void Caps::appendStructure(const Structure & structure)
{
gst_caps_append_structure(object<GstCaps>(), gst_structure_copy(structure));
}
void Caps::mergeStructure(const Structure & structure)
{
gst_caps_merge_structure(object<GstCaps>(), gst_structure_copy(structure));
}
void Caps::removeStructure(uint index)
{
gst_caps_remove_structure(object<GstCaps>(), index);
}
uint Caps::size() const
{
return gst_caps_get_size(object<GstCaps>());
}
bool Caps::isSimple() const
{
return GST_CAPS_IS_SIMPLE(object<GstCaps>());
}
bool Caps::isAny() const
{
return gst_caps_is_any(object<GstCaps>());
}
bool Caps::isEmpty() const
{
return gst_caps_is_empty(object<GstCaps>());
}
bool Caps::isFixed() const
{
return gst_caps_is_fixed(object<GstCaps>());
}
bool Caps::isWritable() const
{
return (GST_CAPS_REFCOUNT_VALUE(object<GstCaps>()) == 1);
}
bool Caps::equals(const CapsPtr & caps2) const
{
return gst_caps_is_equal(object<GstCaps>(), caps2);
}
bool Caps::isAlwaysCompatibleWith(const CapsPtr & caps2) const
{
return gst_caps_is_always_compatible(object<GstCaps>(), caps2);
}
bool Caps::isSubsetOf(const CapsPtr & superset) const
{
return gst_caps_is_subset(object<GstCaps>(), superset);
}
bool Caps::canIntersect(const CapsPtr & caps2) const
{
return gst_caps_can_intersect(object<GstCaps>(), caps2);
}
CapsPtr Caps::getIntersection(const CapsPtr & caps2) const
{
return CapsPtr::wrap(gst_caps_intersect(object<GstCaps>(), caps2), false);
}
CapsPtr Caps::getUnion(const CapsPtr & caps2) const
{
return CapsPtr::wrap(gst_caps_union(object<GstCaps>(), caps2), false);
}
CapsPtr Caps::getNormal() const
{
return CapsPtr::wrap(gst_caps_normalize(object<GstCaps>()), false);
}
CapsPtr Caps::subtract(const CapsPtr & subtrahend) const
{
return CapsPtr::wrap(gst_caps_subtract(object<GstCaps>(), subtrahend), false);
}
CapsPtr Caps::copy() const
{
return CapsPtr::wrap(gst_caps_copy(object<GstCaps>()), false);
}
CapsPtr Caps::copyNth(uint index) const
{
return CapsPtr::wrap(gst_caps_copy_nth(object<GstCaps>(), index), false);
}
void Caps::ref(bool increaseRef)
{
if (Private::ObjectStore::put(m_object)) {
if (increaseRef) {
gst_caps_ref(GST_CAPS(m_object));
}
}
}
void Caps::unref()
{
if (Private::ObjectStore::take(m_object)) {
gst_caps_unref(GST_CAPS(m_object));
}
}
void Caps::makeWritable()
{
if (!isWritable()) {
//m_object will change, need to deal with the reference count properly
unref();
/*
* Calling gst_*_make_writable() below is tempting but wrong, as the above unref() might have
* dropped the gst refcount from 2 to 1 temporarily. When this happens gst_*_make_writable()
* will do nothing, return the same object, and the refcount will go back to 2 when we ref()
* it again below.
* So the right thing to do is to copy() here to make sure we get a new object in this case.
*
* Note that if the external refCount is 1 then the gst_*_make_writable() semantics is
* preserved (nothing is copied, same object is used) as we tested for this condition
* before entering this code path.
*/
m_object = gst_caps_copy(GST_CAPS(m_object));
//Manage our reference count for the new m_object
ref(false);
}
}
QDebug operator<<(QDebug debug, const CapsPtr & caps)
{
debug.nospace() << "QGst::Caps(" << caps->toString() << ")";
return debug.space();
}
} //namespace QGst
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