playlist_factory.cc

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/*
    Copyright (C) 2000-2006 Paul Davis

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 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 General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "pbd/error.h"
#include "pbd/xml++.h"

#include "ardour/playlist.h"
#include "ardour/audioplaylist.h"
#include "ardour/midi_playlist.h"
#include "ardour/playlist_factory.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;

PBD::Signal2<void,boost::shared_ptr<Playlist>, bool> PlaylistFactory::PlaylistCreated;

boost::shared_ptr<Playlist>
PlaylistFactory::create (Session& s, const XMLNode& node, bool hidden, bool unused)
{
        const XMLProperty* type = node.property("type");

        boost::shared_ptr<Playlist> pl;

        try {
                if (!type || type->value() == "audio") {
                        pl = boost::shared_ptr<Playlist> (new AudioPlaylist (s, node, hidden));
                } else if (type->value() == "midi") {
                        pl = boost::shared_ptr<Playlist> (new MidiPlaylist (s, node, hidden));
                }
                
                pl->set_region_ownership ();
                
                if (pl && !hidden) {
                        PlaylistCreated (pl, unused);
                }
                return pl;

        } catch (...) {
                return boost::shared_ptr<Playlist> ();
        }
}

boost::shared_ptr<Playlist>
PlaylistFactory::create (DataType type, Session& s, string name, bool hidden)
{
        boost::shared_ptr<Playlist> pl;

        try {
                if (type == DataType::AUDIO)
                        pl = boost::shared_ptr<Playlist> (new AudioPlaylist (s, name, hidden));
                else if (type == DataType::MIDI)
                        pl = boost::shared_ptr<Playlist> (new MidiPlaylist (s, name, hidden));
                
                if (pl && !hidden) {
                        PlaylistCreated (pl, false);
                }
                
                return pl;
        } catch (...) {
                return boost::shared_ptr<Playlist> ();
        }
}

boost::shared_ptr<Playlist>
PlaylistFactory::create (boost::shared_ptr<const Playlist> old, string name, bool hidden)
{
        boost::shared_ptr<Playlist> pl;
        boost::shared_ptr<const AudioPlaylist> apl;
        boost::shared_ptr<const MidiPlaylist> mpl;
        
        try {

                if ((apl = boost::dynamic_pointer_cast<const AudioPlaylist> (old)) != 0) {
                        pl = boost::shared_ptr<Playlist> (new AudioPlaylist (apl, name, hidden));
                        pl->set_region_ownership ();
                } else if ((mpl = boost::dynamic_pointer_cast<const MidiPlaylist> (old)) != 0) {
                        pl = boost::shared_ptr<Playlist> (new MidiPlaylist (mpl, name, hidden));
                        pl->set_region_ownership ();
                }

                if (pl && !hidden) {
                        PlaylistCreated (pl, false);
                }
                
                return pl;
        } catch (...) {
                return boost::shared_ptr<Playlist> ();
        }
                
}

boost::shared_ptr<Playlist>
PlaylistFactory::create (boost::shared_ptr<const Playlist> old, framepos_t start, framecnt_t cnt, string name, bool hidden)
{
        boost::shared_ptr<Playlist> pl;
        boost::shared_ptr<const AudioPlaylist> apl;
        boost::shared_ptr<const MidiPlaylist> mpl;

        try {
                if ((apl = boost::dynamic_pointer_cast<const AudioPlaylist> (old)) != 0) {
                        pl = boost::shared_ptr<Playlist> (new AudioPlaylist (apl, start, cnt, name, hidden));
                        pl->set_region_ownership ();
                } else if ((mpl = boost::dynamic_pointer_cast<const MidiPlaylist> (old)) != 0) {
                        pl = boost::shared_ptr<Playlist> (new MidiPlaylist (mpl, start, cnt, name, hidden));
                        pl->set_region_ownership ();
                }
                
                /* this factory method does NOT notify others */
                
                return pl;
        } catch (...) {
                return boost::shared_ptr<Playlist> ();
        }
}