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/convert_rgb_to_yuv.h"
6
7 namespace media {
8
clip_byte(int x)9 static int clip_byte(int x) {
10 if (x > 255)
11 return 255;
12 else if (x < 0)
13 return 0;
14 else
15 return x;
16 }
17
ConvertRGB32ToYUV_C(const uint8 * rgbframe,uint8 * yplane,uint8 * uplane,uint8 * vplane,int width,int height,int rgbstride,int ystride,int uvstride)18 void ConvertRGB32ToYUV_C(const uint8* rgbframe,
19 uint8* yplane,
20 uint8* uplane,
21 uint8* vplane,
22 int width,
23 int height,
24 int rgbstride,
25 int ystride,
26 int uvstride) {
27 #if defined(OS_ANDROID)
28 const int r = 0;
29 const int g = 1;
30 const int b = 2;
31 #else
32 const int r = 2;
33 const int g = 1;
34 const int b = 0;
35 #endif
36
37 for (int i = 0; i < height; ++i) {
38 for (int j = 0; j < width; ++j) {
39 // Since the input pixel format is RGB32, there are 4 bytes per pixel.
40 const uint8* pixel = rgbframe + 4 * j;
41 yplane[j] = clip_byte(((pixel[r] * 66 + pixel[g] * 129 +
42 pixel[b] * 25 + 128) >> 8) + 16);
43 if (i % 2 == 0 && j % 2 == 0) {
44 uplane[j / 2] = clip_byte(((pixel[r] * -38 + pixel[g] * -74 +
45 pixel[b] * 112 + 128) >> 8) + 128);
46 vplane[j / 2] = clip_byte(((pixel[r] * 112 + pixel[g] * -94 +
47 pixel[b] * -18 + 128) >> 8) + 128);
48 }
49 }
50 rgbframe += rgbstride;
51 yplane += ystride;
52 if (i % 2 == 0) {
53 uplane += uvstride;
54 vplane += uvstride;
55 }
56 }
57 }
58
ConvertRGB24ToYUV_C(const uint8 * rgbframe,uint8 * yplane,uint8 * uplane,uint8 * vplane,int width,int height,int rgbstride,int ystride,int uvstride)59 void ConvertRGB24ToYUV_C(const uint8* rgbframe,
60 uint8* yplane,
61 uint8* uplane,
62 uint8* vplane,
63 int width,
64 int height,
65 int rgbstride,
66 int ystride,
67 int uvstride) {
68 for (int i = 0; i < height; ++i) {
69 for (int j = 0; j < width; ++j) {
70 // Since the input pixel format is RGB24, there are 3 bytes per pixel.
71 const uint8* pixel = rgbframe + 3 * j;
72 yplane[j] = clip_byte(((pixel[2] * 66 + pixel[1] * 129 +
73 pixel[0] * 25 + 128) >> 8) + 16);
74 if (i % 2 == 0 && j % 2 == 0) {
75 uplane[j / 2] = clip_byte(((pixel[2] * -38 + pixel[1] * -74 +
76 pixel[0] * 112 + 128) >> 8) + 128);
77 vplane[j / 2] = clip_byte(((pixel[2] * 112 + pixel[1] * -94 +
78 pixel[0] * -18 + 128) >> 8) + 128);
79 }
80 }
81
82 rgbframe += rgbstride;
83 yplane += ystride;
84 if (i % 2 == 0) {
85 uplane += uvstride;
86 vplane += uvstride;
87 }
88 }
89 }
90
91 } // namespace media
92