The Tor Browser: content/media/webaudio/blink/ZeroPole.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /*

     2  * Copyright (C) 2011 Google Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  *

     8  * 1.  Redistributions of source code must retain the above copyright

     9  *     notice, this list of conditions and the following disclaimer.

    10  * 2.  Redistributions in binary form must reproduce the above copyright

    11  *     notice, this list of conditions and the following disclaimer in the

    12  *     documentation and/or other materials provided with the distribution.

    13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

    14  *     its contributors may be used to endorse or promote products derived

    15  *     from this software without specific prior written permission.

    16  *

    17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

    18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

    21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

    24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

    26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    27  */

    29 #ifndef ZeroPole_h

    30 #define ZeroPole_h

    32 namespace WebCore {

    34 // ZeroPole is a simple filter with one zero and one pole.

    36 class ZeroPole {

    37 public:

    38     ZeroPole()

    39         : m_zero(0)

    40         , m_pole(0)

    41         , m_lastX(0)

    42         , m_lastY(0)

    43     {

    44     }

    46     void process(const float *source, float *destination, int framesToProcess);

    48     // Reset filter state.

    49     void reset() { m_lastX = 0; m_lastY = 0; }

    51     void setZero(float zero) { m_zero = zero; }

    52     void setPole(float pole) { m_pole = pole; }

    54     float zero() const { return m_zero; }

    55     float pole() const { return m_pole; }

    57 private:

    58     float m_zero;

    59     float m_pole;

    60     float m_lastX;

    61     float m_lastY;

    62 };

    64 } // namespace WebCore

    66 #endif // ZeroPole_h

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