PresetPreviewPlayHandle.h

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/*
 * PresetPreviewPlayHandle.h - a PlayHandle specialization for playback of a short
 *                             preview of a preset or a file processed by a plugin
 *
 * Copyright (c) 2005-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * 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 (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
#ifndef LMMS_PRESET_PREVIEW_PLAY_HANDLE_H
#define LMMS_PRESET_PREVIEW_PLAY_HANDLE_H
 
#include "NotePlayHandle.h"
 
namespace lmms
{
 
 
class DataFile;
class InstrumentTrack;
class PreviewTrackContainer;
 
class LMMS_EXPORT PresetPreviewPlayHandle : public PlayHandle
{
public:
    PresetPreviewPlayHandle( const QString& presetFile, bool loadByPlugin = false, DataFile *dataFile = 0 );
    ~PresetPreviewPlayHandle() override;
 
    inline bool affinityMatters() const override
    {
        return true;
    }
 
    void play( SampleFrame* buffer ) override;
    bool isFinished() const override;
 
    bool isFromTrack( const Track * _track ) const override;
 
    static void init();
    static void cleanup();
    static ConstNotePlayHandleList nphsOfInstrumentTrack( const InstrumentTrack* instrumentTrack );
 
    static bool isPreviewing();
 
 
private:
    static PreviewTrackContainer* s_previewTC;
 
    NotePlayHandle* m_previewNote;
 
} ;
 
 
} // namespace lmms
 
#endif // LMMS_PRESET_PREVIEW_PLAY_HANDLE_H