src/media/base/simd/convert_yuv_to_rgb_x86.cc

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#if defined(_MSC_VER)
#include <intrin.h>
#else
#include <mmintrin.h>
#endif

#include "media/base/simd/convert_yuv_to_rgb.h"
#include "media/base/yuv_convert.h"

namespace media {

void ConvertYUVToRGB32_MMX(const uint8* yplane,
                           const uint8* uplane,
                           const uint8* vplane,
                           uint8* rgbframe,
                           int width,
                           int height,
                           int ystride,
                           int uvstride,
                           int rgbstride,
                           YUVType yuv_type) {
  unsigned int y_shift = yuv_type;
  for (int y = 0; y < height; ++y) {
    uint8* rgb_row = rgbframe + y * rgbstride;
    const uint8* y_ptr = yplane + y * ystride;
    const uint8* u_ptr = uplane + (y >> y_shift) * uvstride;
    const uint8* v_ptr = vplane + (y >> y_shift) * uvstride;

    ConvertYUVToRGB32Row_MMX(y_ptr,
                             u_ptr,
                             v_ptr,
                             rgb_row,
                             width);
  }

  _mm_empty();
}

void ConvertYUVToRGB32_SSE(const uint8* yplane,
                           const uint8* uplane,
                           const uint8* vplane,
                           uint8* rgbframe,
                           int width,
                           int height,
                           int ystride,
                           int uvstride,
                           int rgbstride,
                           YUVType yuv_type) {
  unsigned int y_shift = yuv_type;
  for (int y = 0; y < height; ++y) {
    uint8* rgb_row = rgbframe + y * rgbstride;
    const uint8* y_ptr = yplane + y * ystride;
    const uint8* u_ptr = uplane + (y >> y_shift) * uvstride;
    const uint8* v_ptr = vplane + (y >> y_shift) * uvstride;

    ConvertYUVToRGB32Row_SSE(y_ptr,
                             u_ptr,
                             v_ptr,
                             rgb_row,
                             width);
  }

  _mm_empty();
}

}  // namespace media