1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_BASE_VECTOR_MATH_H_ 6 #define MEDIA_BASE_VECTOR_MATH_H_ 7 8 #include "media/base/media_export.h" 9 10 namespace media { 11 namespace vector_math { 12 13 // Required alignment for inputs and outputs to all vector math functions 14 enum { kRequiredAlignment = 16 }; 15 16 // Selects runtime specific optimizations such as SSE. Must be called prior to 17 // calling FMAC() or FMUL(). Called during media library initialization; most 18 // users should never have to call this. 19 MEDIA_EXPORT void Initialize(); 20 21 // Multiply each element of |src| (up to |len|) by |scale| and add to |dest|. 22 // |src| and |dest| must be aligned by kRequiredAlignment. 23 MEDIA_EXPORT void FMAC(const float src[], float scale, int len, float dest[]); 24 25 // Multiply each element of |src| by |scale| and store in |dest|. |src| and 26 // |dest| must be aligned by kRequiredAlignment. 27 MEDIA_EXPORT void FMUL(const float src[], float scale, int len, float dest[]); 28 29 } // namespace vector_math 30 } // namespace media 31 32 #endif // MEDIA_BASE_VECTOR_MATH_H_ 33
