From 9453078f2d66fad806ee104e7c6993bba1043c6a Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Tue, 14 Jun 2016 21:13:28 +0200 Subject: New input processor filter system. Moved processing from Instrument calss to new input processing filter system and prepared for new latency filter. --- src/inputfilter.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 src/inputfilter.h (limited to 'src/inputfilter.h') diff --git a/src/inputfilter.h b/src/inputfilter.h new file mode 100644 index 0000000..26f7294 --- /dev/null +++ b/src/inputfilter.h @@ -0,0 +1,50 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * inputfilter.h + * + * Tue Jun 14 20:42:52 CEST 2016 + * Copyright 2016 Bent Bisballe Nyeng + * deva@aasimon.org + ****************************************************************************/ + +/* + * This file is part of DrumGizmo. + * + * DrumGizmo 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 3 of the License, or + * (at your option) any later version. + * + * DrumGizmo 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 DrumGizmo; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#pragma once + +#include + +//! An abstract filter component for the InputProcessor class filter chain. +class InputFilter +{ +public: + //! Implement to filter a single event. + //! \param[in,out] event The event being processed. The filter method + //! might alter any of the event parameters. + //! \param pos The absolute position of the buffer in which the event in + //! event was received. Add event.pos to it to get the absolute position of + //! the event in the stream. + //! \return true to keep the event, false to discard it. + virtual bool filter(event_t& event, std::size_t pos) = 0; + + //! Returns the filter delay in samples. + //! Overload if needed. + virtual std::size_t getLatency() const + { + return 0; + } +}; -- cgit v1.2.3