Ichthyostega
6bdf0e2cdc
(search & replace). Please feel free to add your name to any files to which you added any contributions. ALL SOURCECODE IS LICENCED UNDER THE TERMS AND CONDITIONS OF THE GPL (2 and above)
241 lines
7.1 KiB
C++
241 lines
7.1 KiB
C++
/*
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Media(Asset) - key abstraction: media-like assets
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Copyright (C) CinelerraCV
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2007, 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/assetmanager.hpp"
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#include "proc/asset/media.hpp"
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#include "proc/asset/clip.hpp"
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#include "proc/asset/unknown.hpp"
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#include "proc/mobject/session/clip.hpp"
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#include "proc/mobject/session/mobjectfactory.hpp"
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#include "common/util.hpp"
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#include "nobugcfg.h"
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#include <boost/regex.hpp>
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#include <boost/format.hpp>
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using util::isnil;
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using boost::format;
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using boost::regex;
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using boost::smatch;
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using boost::regex_search;
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using std::tr1::dynamic_pointer_cast;
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namespace asset
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{
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namespace // Implementation details
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{
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/** helper: extract a name token out of a given path/filename
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* @return sanitized token based on the name (minus extension),
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* empty string if not the common filename pattern.
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*/
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string extractName (const string& path)
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{
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regex pathname_pattern("([^/\\.]+)(\\.\\w+)?$");
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smatch match;
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if (regex_search (path, match, pathname_pattern))
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return util::sanitize (string (match[1]));
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else
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return "";
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}
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}
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Media::PClipMO
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Media::createClip ()
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{
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PClip clipAsset (getClipAsset());
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PClipMO clipMO = clipAsset->createClip();
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ENSURE (clipMO->isValid());
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return clipMO;
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}
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/** @internal used to either create an asset::Clip denoting the whole media,
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* or to get the right reference to some already existing asset::Clip,
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* especially when this media is part of a compound (multichannel) media.
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*/
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Media::PClip
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Media::getClipAsset ()
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{
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if (PMedia parent = this->checkCompound())
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return parent->getClipAsset();
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else
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return Media::create(*this);
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}
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Media::PMedia
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Media::checkCompound() const
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{
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vector<PAsset> parents = this->getParents();
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PMedia parent;
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if ( !isnil (parents)) // primary parent is a media asset?
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parent = dynamic_pointer_cast<Media,Asset> (parents[0]);
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return parent;
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}
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Media::PProcPatt
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Media::howtoProc () const
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{
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UNIMPLEMENTED ("calculate and return processing pattern for media asset");
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PProcPatt ppatt; //TODO:null
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ENSURE (ppatt);
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return ppatt;
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}
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cinelerra::Time
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Media::getLength() const
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{
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return len_;
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}
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MediaFactory Media::create; ///< storage for the static MediaFactory instance
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/** Factory method for Media Asset instances. Depending on the filename given,
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* either a asset::Media object or an "Unknown" placeholder will be provided. If
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* the given Category already contains an "Unkown", we just get the
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* corresponding smart-ptr. Otherwise a new asset::Unknown is created.
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* @return an Media smart ptr linked to the internally registered smart ptr
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* created as a side effect of calling the concrete Media subclass ctor.
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*/
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MediaFactory::PType
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MediaFactory::operator() (Asset::Ident& key, const string& file)
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{
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asset::Media* pM (0);
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AssetManager& aMang = AssetManager::instance();
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TODO ("check and fix Category if necessary");
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if (isnil (file))
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{
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if (isnil (key.name)) key.name="nil";
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ID<Asset> id = aMang.getID (key);
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if (aMang.known (id))
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return aMang.getAsset(ID<Media>(id));
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else
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pM = new Unknown(key);
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}
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else
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{
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if (isnil (key.name)) key.name=extractName(file);
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TODO ("file exists?");
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TODO ("extract media file properties");
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Time length(25);
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TODO ("detecting and wiring multichannel compound media!");
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pM = new Media (key,file,length);
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}
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ASSERT (pM);
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ENSURE (key.category.hasKind (VIDEO) || key.category.hasKind(AUDIO));
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ENSURE (!isnil (key.name));
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ENSURE (dynamic_cast<Media*>(pM) || (isnil (file) && dynamic_cast<Unknown*>(pM)));
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return aMang.getAsset (pM->getID()); // note: because we query with an ID<Media>,
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// we get a Media smart ptr.
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}
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/** Variant of the Factory method for Media Assets, automatically
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* providing most of the Asset key fields based on the filename given
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*/
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MediaFactory::PType
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MediaFactory::operator() (const string& file, const Category& cat)
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{
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Asset::Ident key(extractName(file), cat, "cin3", 1);
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return operator() (key, file);
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}
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MediaFactory::PType
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MediaFactory::operator() (const string& file, asset::Kind kind)
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{
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Category cat(kind);
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return operator() (file, cat);
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}
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MediaFactory::PType
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MediaFactory::operator() (const char* file, const Category& cat)
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{
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if (!file) file = "";
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return operator() (string(file),cat);
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}
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MediaFactory::PType
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MediaFactory::operator() (const char* file, asset::Kind kind)
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{
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if (!file) file = "";
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return operator() (string(file),kind);
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}
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MediaFactory::PType
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MediaFactory::operator() (Asset::Ident& key, const char* file)
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{
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if (!file) file = "";
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return operator() (key, string(file));
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}
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/** Factory method for creating a Clip asset based
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* on the given Media asset. This asset::Clip can be used
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* to create clip in the EDL covering the whole length of
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* this media.
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* @note creates a dependency between media and new clip
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* @throw Invalid if the given media asset is not top-level,
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* but rather part or a multichannel (compound) media
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*/
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shared_ptr<asset::Clip>
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MediaFactory::operator() (asset::Media& mediaref) throw(cinelerra::error::Invalid)
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{
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if (mediaref.checkCompound())
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throw cinelerra::error::Invalid (str(format("Attempt to create a asset::Clip from the media %s, "
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"which is not toplevel but rather part or a compound "
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"(multichannel) media. Found parent Media %s.")
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% string(mediaref)
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% string(*mediaref.checkCompound()))
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,CINELERRA_ERROR_PART_OF_COMPOUND
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);
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asset::Clip* pC = new asset::Clip (mediaref);
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return AssetManager::instance().getPtr (*pC);
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}
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CINELERRA_ERROR_DEFINE (PART_OF_COMPOUND, "part of compound used as toplevel element");
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} // namespace asset
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