third_party/WebKit/Source/platform/audio/VectorMath.h

   1 /*
   2  * Copyright (C) 2010, 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  * 1.  Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2.  Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #ifndef VectorMath_h
  26 #define VectorMath_h
  27
  28 #include "platform/PlatformExport.h"
  29
  30 // Defines the interface for several vector math functions whose implementation will ideally be optimized.
  31
  32 namespace blink {
  33 namespace VectorMath {
  34
  35 // Vector scalar multiply and then add.
  36 PLATFORM_EXPORT void vsma(const float* sourceP, int sourceStride, const float* scale, float* destP, int destStride, size_t framesToProcess);
  37
  38 PLATFORM_EXPORT void vsmul(const float* sourceP, int sourceStride, const float* scale, float* destP, int destStride, size_t framesToProcess);
  39 PLATFORM_EXPORT void vadd(const float* source1P, int sourceStride1, const float* source2P, int sourceStride2, float* destP, int destStride, size_t framesToProcess);
  40
  41 // Finds the maximum magnitude of a float vector.
  42 PLATFORM_EXPORT void vmaxmgv(const float* sourceP, int sourceStride, float* maxP, size_t framesToProcess);
  43
  44 // Sums the squares of a float vector's elements.
  45 PLATFORM_EXPORT void vsvesq(const float* sourceP, int sourceStride, float* sumP, size_t framesToProcess);
  46
  47 // For an element-by-element multiply of two float vectors.
  48 PLATFORM_EXPORT void vmul(const float* source1P, int sourceStride1, const float* source2P, int sourceStride2, float* destP, int destStride, size_t framesToProcess);
  49
  50 // Multiplies two complex vectors.
  51 PLATFORM_EXPORT void zvmul(const float* real1P, const float* imag1P, const float* real2P, const float* imag2P, float* realDestP, float* imagDestP, size_t framesToProcess);
  52
  53 // Copies elements while clipping values to the threshold inputs.
  54 PLATFORM_EXPORT void vclip(const float* sourceP, int sourceStride, const float* lowThresholdP, const float* highThresholdP, float* destP, int destStride, size_t framesToProcess);
  55
  56 } // namespace VectorMath
  57 } // namespace blink
  58
  59 #endif // VectorMath_h