126 lines
3.7 KiB
C++
126 lines
3.7 KiB
C++
/*
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Clip(Asset) - bookkeeping (asset) view of a media clip.
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "proc/asset/clip.hpp"
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#include "proc/mobject/session/mobjectfactory.hpp" ////TODO: avoidable?
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using std::tr1::static_pointer_cast;
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namespace asset
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{
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namespace
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{
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/** @internal derive a sensible asset ident tuple
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* when creating a asset::Clip based on some asset::Media
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* @todo getting this one correct is important for handling creation
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* of multiple clip instances from one media. Means we
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* have still to figure out a sensible concept...
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*/
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const Asset::Ident
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createClipIdent (const Media& mediaref)
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{
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string name (mediaref.ident.name + "-clip"); // TODO something sensible here; append number, sanitize etc.
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Category category (mediaref.ident.category);
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category.setPath(CLIP_SUBFOLDER);
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return Asset::Ident (name, category,
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mediaref.ident.org,
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mediaref.ident.version );
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}
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Media::PClipMO
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createClipMO (const Clip& thisClipAsset, const Media& mediaChannel)
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{
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return mobject::MObject::create (thisClipAsset,mediaChannel);
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}
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}
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Clip::Clip (Media& mediaref)
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: Media (createClipIdent (mediaref),
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mediaref.getFilename(),
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mediaref.getLength())
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, source_ (mediaref)
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, clipMO_ (createClipMO (*this, source_))
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{
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this->defineDependency (mediaref);
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}
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/** Specialisation of the asset::Media interface method,
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* just returning the already existing Clip-MO. Every
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* asset::Clip internally holds a Clip-MO, which has
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* been created alongside. This Clip-MO may have several
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* Placements or no placement at all (meaning it need not
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* be placed within the EDL)
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*/
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Media::PClipMO
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Clip::createClip () const
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{
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return clipMO_;
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}
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/** in spite of asset::Clip being a concrete subclass (and not an asset subinterface),
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* we need to create the following explicit specialisation for asset::Clip#getClipAsset.
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* Basically, it's a "shared-ptr-from-this"-function.
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*/
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template<>
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shared_ptr<Clip>
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AssetManager::getPtr (const Clip& asset)
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{
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ENSURE (instance().known(asset.id),
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"unregistered asset instance encountered.");
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return static_pointer_cast<Clip,Asset>
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(instance().getAsset (asset.id));
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}
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/** return this wrapped into a shared ptr,
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* because it's already the desired asset::Clip
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*/
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Media::PClip
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Clip::getClipAsset ()
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{
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return AssetManager::getPtr(*this);
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}
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/** specialisation delegating the decision to
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* the media asset referred by this clip
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*/
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Media::PMedia
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Clip::checkCompound ()
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{
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return source_.checkCompound(); ////////////////////////TODO better interface!!!
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}
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} // namespace asset
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