media/base/simd/convert_rgb_to_yuv_ssse3.h

   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_SIMD_CONVERT_RGB_TO_YUV_SSSE3_H_
   6 #define MEDIA_BASE_SIMD_CONVERT_RGB_TO_YUV_SSSE3_H_
   7
   8 #ifdef __cplusplus
   9 extern "C" {
  10 #endif
  11
  12 // The header file for ASM functions that convert a row of RGB pixels with SSSE3
  13 // instructions so we can call them from C++ code. These functions are
  14 // implemented in "convert_rgb_to_yuv_ssse3.asm".
  15
  16 // We use ptrdiff_t instead of int for yasm routine parameters to portably
  17 // sign-extend int. On Win64, MSVC does not sign-extend the value in the stack
  18 // home of int function parameters, and yasm routines are unaware of this lack
  19 // of extension and fault.  ptrdiff_t is portably sign-extended and fixes this
  20 // issue on at least Win64.
  21
  22 // Convert a row of 24-bit RGB pixels to YV12 pixels.
  23 void ConvertRGBToYUVRow_SSSE3(const uint8* rgb,
  24                               uint8* y,
  25                               uint8* u,
  26                               uint8* v,
  27                               ptrdiff_t width);
  28
  29 // Convert a row of 32-bit RGB pixels to YV12 pixels.
  30 void ConvertARGBToYUVRow_SSSE3(const uint8* argb,
  31                                uint8* y,
  32                                uint8* u,
  33                                uint8* v,
  34                                ptrdiff_t width);
  35
  36 #ifdef __cplusplus
  37 }
  38 #endif
  39
  40 #endif  // MEDIA_BASE_SIMD_CONVERT_RGB_TO_YUV_SSSE3_H_