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67 lines
2.3 KiB
C++
67 lines
2.3 KiB
C++
/*
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* Copyright (C) 2011 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ZeroPole_h
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#define ZeroPole_h
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namespace WebCore {
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// ZeroPole is a simple filter with one zero and one pole.
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class ZeroPole {
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public:
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ZeroPole()
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: m_zero(0)
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, m_pole(0)
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, m_lastX(0)
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, m_lastY(0)
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{
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}
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void process(const float *source, float *destination, unsigned framesToProcess);
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// Reset filter state.
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void reset() { m_lastX = 0; m_lastY = 0; }
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void setZero(float zero) { m_zero = zero; }
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void setPole(float pole) { m_pole = pole; }
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float zero() const { return m_zero; }
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float pole() const { return m_pole; }
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private:
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float m_zero;
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float m_pole;
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float m_lastX;
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float m_lastY;
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};
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} // namespace WebCore
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#endif // ZeroPole_h
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