1// Copyright (c) 2011 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#include "media/base/simd/filter_yuv.h"
6
7namespace media {
8
9void FilterYUVRows_C(uint8* ybuf, const uint8* y0_ptr, const uint8* y1_ptr,
10                     int source_width, int source_y_fraction) {
11  int y1_fraction = source_y_fraction;
12  int y0_fraction = 256 - y1_fraction;
13  uint8* end = ybuf + source_width;
14  uint8* rounded_end = ybuf + (source_width & ~7);
15
16  while (ybuf < rounded_end) {
17    ybuf[0] = (y0_ptr[0] * y0_fraction + y1_ptr[0] * y1_fraction) >> 8;
18    ybuf[1] = (y0_ptr[1] * y0_fraction + y1_ptr[1] * y1_fraction) >> 8;
19    ybuf[2] = (y0_ptr[2] * y0_fraction + y1_ptr[2] * y1_fraction) >> 8;
20    ybuf[3] = (y0_ptr[3] * y0_fraction + y1_ptr[3] * y1_fraction) >> 8;
21    ybuf[4] = (y0_ptr[4] * y0_fraction + y1_ptr[4] * y1_fraction) >> 8;
22    ybuf[5] = (y0_ptr[5] * y0_fraction + y1_ptr[5] * y1_fraction) >> 8;
23    ybuf[6] = (y0_ptr[6] * y0_fraction + y1_ptr[6] * y1_fraction) >> 8;
24    ybuf[7] = (y0_ptr[7] * y0_fraction + y1_ptr[7] * y1_fraction) >> 8;
25    y0_ptr += 8;
26    y1_ptr += 8;
27    ybuf += 8;
28  }
29
30  while (ybuf < end) {
31    ybuf[0] = (y0_ptr[0] * y0_fraction + y1_ptr[0] * y1_fraction) >> 8;
32    ++ybuf;
33    ++y0_ptr;
34    ++y1_ptr;
35  }
36}
37
38}  // namespace media
39