| // Copyright (c) 2011 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. |
| |
| #include "media/base/simd/convert_rgb_to_yuv.h" |
| |
| namespace media { |
| |
| static int clip_byte(int x) { |
| if (x > 255) |
| return 255; |
| else if (x < 0) |
| return 0; |
| else |
| return x; |
| } |
| |
| void ConvertRGB32ToYUV_C(const uint8* rgbframe, |
| uint8* yplane, |
| uint8* uplane, |
| uint8* vplane, |
| int width, |
| int height, |
| int rgbstride, |
| int ystride, |
| int uvstride) { |
| for (int i = 0; i < height; ++i) { |
| for (int j = 0; j < width; ++j) { |
| // Since the input pixel format is RGB32, there are 4 bytes per pixel. |
| const uint8* pixel = rgbframe + 4 * j; |
| yplane[j] = clip_byte(((pixel[2] * 66 + pixel[1] * 129 + |
| pixel[0] * 25 + 128) >> 8) + 16); |
| if (i % 2 == 0 && j % 2 == 0) { |
| uplane[j / 2] = clip_byte(((pixel[2] * -38 + pixel[1] * -74 + |
| pixel[0] * 112 + 128) >> 8) + 128); |
| vplane[j / 2] = clip_byte(((pixel[2] * 112 + pixel[1] * -94 + |
| pixel[0] * -18 + 128) >> 8) + 128); |
| } |
| } |
| |
| rgbframe += rgbstride; |
| yplane += ystride; |
| if (i % 2 == 0) { |
| uplane += uvstride; |
| vplane += uvstride; |
| } |
| } |
| } |
| |
| void ConvertRGB24ToYUV_C(const uint8* rgbframe, |
| uint8* yplane, |
| uint8* uplane, |
| uint8* vplane, |
| int width, |
| int height, |
| int rgbstride, |
| int ystride, |
| int uvstride) { |
| for (int i = 0; i < height; ++i) { |
| for (int j = 0; j < width; ++j) { |
| // Since the input pixel format is RGB24, there are 3 bytes per pixel. |
| const uint8* pixel = rgbframe + 3 * j; |
| yplane[j] = clip_byte(((pixel[2] * 66 + pixel[1] * 129 + |
| pixel[0] * 25 + 128) >> 8) + 16); |
| if (i % 2 == 0 && j % 2 == 0) { |
| uplane[j / 2] = clip_byte(((pixel[2] * -38 + pixel[1] * -74 + |
| pixel[0] * 112 + 128) >> 8) + 128); |
| vplane[j / 2] = clip_byte(((pixel[2] * 112 + pixel[1] * -94 + |
| pixel[0] * -18 + 128) >> 8) + 128); |
| } |
| } |
| |
| rgbframe += rgbstride; |
| yplane += ystride; |
| if (i % 2 == 0) { |
| uplane += uvstride; |
| vplane += uvstride; |
| } |
| } |
| } |
| |
| } // namespace media |