/* gstreamermm - a C++ wrapper for gstreamer
 *
 * Copyright 2008-2016 The gstreamermm Development Team
 *
 * 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 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <gstreamermm/structure.h>
#include <gstreamermm/capsfeatures.h>

namespace Gst
{

GType Caps::get_type()
{
  return gst_caps_get_type();
}

Glib::RefPtr<Caps> Caps::create_writable()
{
  return Glib::RefPtr<Caps>::cast_static(MiniObject::create_writable());
}

Glib::RefPtr<Gst::Caps> Caps::create(const Structure& structure)
{
  //We take a copy because gst_caps_append_structure() wants to take ownership:
  GstStructure* copy = gst_structure_copy(structure.gobj());
  return Glib::wrap(gst_caps_new_full(copy, nullptr));
}

void Caps::append_structure(const Structure& structure)
{
  //We take a copy because gst_caps_append_structure() wants to take ownership:
  GstStructure* copy = gst_structure_copy(structure.gobj());
  gst_caps_append_structure(gobj(), copy);
}

void Caps::append_structure(const Structure& structure, const CapsFeatures& features)
{
  //We take a copy because gst_caps_append_structure_full() wants to take ownership:
  GstStructure* copy_structure = gst_structure_copy(structure.gobj());
  GstCapsFeatures* copy_features = gst_caps_features_copy(features.gobj());
  gst_caps_append_structure_full(gobj(), copy_structure, copy_features);
}


Glib::RefPtr<Caps> Caps::merge_structure(const Structure& structure)
{
  //We take a copy because gst_caps_merge_structure() wants to take ownership:
  GstStructure* copy = gst_structure_copy(structure.gobj());
  return Glib::wrap(gst_caps_merge_structure(gobj(), copy), true);
}

Glib::RefPtr<Caps> Caps::merge_structure(const Structure& structure, const CapsFeatures& features)
{
  //We take a copy because gst_caps_merge_structure_full() wants to take ownership:
  GstStructure* copy_structure = gst_structure_copy(structure.gobj());
  GstCapsFeatures* copy_features = gst_caps_features_copy(features.gobj());
  return Glib::wrap(gst_caps_merge_structure_full(gobj(), copy_structure, copy_features), true);
}

//TODO: Want to return RefPtr to Caps but using RefPtr in expressions such
// as 'caps->set_simple(name1, value1)->set_simple(name2, value2)' a
// causes gstreamer Structure immutability warnings because the Caps is
// referenced more than once in the expression (see bug #510301).
/*
  This method is implemented in place of gst_caps_set_simple which is a
  variable argument function and cannot be wrapped.  We don't call
  gst_caps_set_simple() directly because we are using a Glib::ValueBase as the
  value to be set instead of listing out each field in the value as would be
  done with gst_caps_set_simple()
*/
//Glib::RefPtr<Gst::Caps>
void
Caps::set_simple(const Glib::ustring& name, const Glib::ValueBase& value)
{
  g_return_if_fail (g_atomic_int_get(&(this->gobj())->mini_object.refcount) == 1); // IS_WRITABLE(caps) fails

  //The result of gst_caps_get_structure() should not be modified, according to
  //its documentation, but we are reimplementing gst_caps_set_simple() which
  //does that:
  GstStructure* structure = gst_caps_get_structure(gobj(), 0);
  if(structure)
    gst_structure_set_value(structure, name.c_str(), value.gobj());

  //return Glib::wrap(gobj(), true);
}

void
Caps::set_simple(const Glib::ustring& name, const char* data)
{
  set_simple(name, std::string(data));
}

CapsFeatures Caps::get_features(guint index) const
{
  GstCapsFeatures* features = gst_caps_get_features(gobj(), index);
  return CapsFeatures(features, true);
}

void Caps::set_features(guint index, const CapsFeatures& features)
{
  GstCapsFeatures* copy = gst_caps_features_copy(features.gobj());
  gst_caps_set_features(gobj(), index, copy);
}

Glib::RefPtr<Gst::Caps> Caps::truncate()
{
  reference();
  return Glib::wrap(gst_caps_truncate(gobj()));
}

Glib::RefPtr<Gst::Caps> Caps::merge(Glib::RefPtr<Gst::Caps>&& caps)
{
  if (is_writable())
  {
    return Glib::wrap(gst_caps_merge(gobj(), caps.release()->gobj()), true);
  }
  else
  {
    reference();
    return Glib::wrap(gst_caps_merge(gobj(), caps.release()->gobj()), false);
  }
}

} //namespace Gst

namespace Glib 
{
Glib::RefPtr<Gst::Caps> Value< Glib::RefPtr<Gst::Caps> >::get()
{
  return Glib::wrap(reinterpret_cast<GstCaps*>(get_boxed()), true); 
}
}
