OLD | NEW |
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/base/simd/convert_rgb_to_yuv.h" | 5 #include "media/base/simd/convert_rgb_to_yuv.h" |
6 | 6 |
7 namespace media { | 7 namespace media { |
8 | 8 |
9 static int clip_byte(int x) { | 9 static int clip_byte(int x) { |
10 if (x > 255) | 10 if (x > 255) |
11 return 255; | 11 return 255; |
12 else if (x < 0) | 12 else if (x < 0) |
13 return 0; | 13 return 0; |
14 else | 14 else |
15 return x; | 15 return x; |
16 } | 16 } |
17 | 17 |
18 void ConvertRGB32ToYUV_C(const uint8* rgbframe, | 18 void ConvertRGB32ToYUV_C(const uint8_t* rgbframe, |
19 uint8* yplane, | 19 uint8_t* yplane, |
20 uint8* uplane, | 20 uint8_t* uplane, |
21 uint8* vplane, | 21 uint8_t* vplane, |
22 int width, | 22 int width, |
23 int height, | 23 int height, |
24 int rgbstride, | 24 int rgbstride, |
25 int ystride, | 25 int ystride, |
26 int uvstride) { | 26 int uvstride) { |
27 #if defined(OS_ANDROID) | 27 #if defined(OS_ANDROID) |
28 const int r = 0; | 28 const int r = 0; |
29 const int g = 1; | 29 const int g = 1; |
30 const int b = 2; | 30 const int b = 2; |
31 #else | 31 #else |
32 const int r = 2; | 32 const int r = 2; |
33 const int g = 1; | 33 const int g = 1; |
34 const int b = 0; | 34 const int b = 0; |
35 #endif | 35 #endif |
36 | 36 |
37 for (int i = 0; i < height; ++i) { | 37 for (int i = 0; i < height; ++i) { |
38 for (int j = 0; j < width; ++j) { | 38 for (int j = 0; j < width; ++j) { |
39 // Since the input pixel format is RGB32, there are 4 bytes per pixel. | 39 // Since the input pixel format is RGB32, there are 4 bytes per pixel. |
40 const uint8* pixel = rgbframe + 4 * j; | 40 const uint8_t* pixel = rgbframe + 4 * j; |
41 yplane[j] = clip_byte(((pixel[r] * 66 + pixel[g] * 129 + | 41 yplane[j] = clip_byte(((pixel[r] * 66 + pixel[g] * 129 + |
42 pixel[b] * 25 + 128) >> 8) + 16); | 42 pixel[b] * 25 + 128) >> 8) + 16); |
43 if (i % 2 == 0 && j % 2 == 0) { | 43 if (i % 2 == 0 && j % 2 == 0) { |
44 uplane[j / 2] = clip_byte(((pixel[r] * -38 + pixel[g] * -74 + | 44 uplane[j / 2] = clip_byte(((pixel[r] * -38 + pixel[g] * -74 + |
45 pixel[b] * 112 + 128) >> 8) + 128); | 45 pixel[b] * 112 + 128) >> 8) + 128); |
46 vplane[j / 2] = clip_byte(((pixel[r] * 112 + pixel[g] * -94 + | 46 vplane[j / 2] = clip_byte(((pixel[r] * 112 + pixel[g] * -94 + |
47 pixel[b] * -18 + 128) >> 8) + 128); | 47 pixel[b] * -18 + 128) >> 8) + 128); |
48 } | 48 } |
49 } | 49 } |
50 rgbframe += rgbstride; | 50 rgbframe += rgbstride; |
51 yplane += ystride; | 51 yplane += ystride; |
52 if (i % 2 == 0) { | 52 if (i % 2 == 0) { |
53 uplane += uvstride; | 53 uplane += uvstride; |
54 vplane += uvstride; | 54 vplane += uvstride; |
55 } | 55 } |
56 } | 56 } |
57 } | 57 } |
58 | 58 |
59 void ConvertRGB24ToYUV_C(const uint8* rgbframe, | 59 void ConvertRGB24ToYUV_C(const uint8_t* rgbframe, |
60 uint8* yplane, | 60 uint8_t* yplane, |
61 uint8* uplane, | 61 uint8_t* uplane, |
62 uint8* vplane, | 62 uint8_t* vplane, |
63 int width, | 63 int width, |
64 int height, | 64 int height, |
65 int rgbstride, | 65 int rgbstride, |
66 int ystride, | 66 int ystride, |
67 int uvstride) { | 67 int uvstride) { |
68 for (int i = 0; i < height; ++i) { | 68 for (int i = 0; i < height; ++i) { |
69 for (int j = 0; j < width; ++j) { | 69 for (int j = 0; j < width; ++j) { |
70 // Since the input pixel format is RGB24, there are 3 bytes per pixel. | 70 // Since the input pixel format is RGB24, there are 3 bytes per pixel. |
71 const uint8* pixel = rgbframe + 3 * j; | 71 const uint8_t* pixel = rgbframe + 3 * j; |
72 yplane[j] = clip_byte(((pixel[2] * 66 + pixel[1] * 129 + | 72 yplane[j] = clip_byte(((pixel[2] * 66 + pixel[1] * 129 + |
73 pixel[0] * 25 + 128) >> 8) + 16); | 73 pixel[0] * 25 + 128) >> 8) + 16); |
74 if (i % 2 == 0 && j % 2 == 0) { | 74 if (i % 2 == 0 && j % 2 == 0) { |
75 uplane[j / 2] = clip_byte(((pixel[2] * -38 + pixel[1] * -74 + | 75 uplane[j / 2] = clip_byte(((pixel[2] * -38 + pixel[1] * -74 + |
76 pixel[0] * 112 + 128) >> 8) + 128); | 76 pixel[0] * 112 + 128) >> 8) + 128); |
77 vplane[j / 2] = clip_byte(((pixel[2] * 112 + pixel[1] * -94 + | 77 vplane[j / 2] = clip_byte(((pixel[2] * 112 + pixel[1] * -94 + |
78 pixel[0] * -18 + 128) >> 8) + 128); | 78 pixel[0] * -18 + 128) >> 8) + 128); |
79 } | 79 } |
80 } | 80 } |
81 | 81 |
82 rgbframe += rgbstride; | 82 rgbframe += rgbstride; |
83 yplane += ystride; | 83 yplane += ystride; |
84 if (i % 2 == 0) { | 84 if (i % 2 == 0) { |
85 uplane += uvstride; | 85 uplane += uvstride; |
86 vplane += uvstride; | 86 vplane += uvstride; |
87 } | 87 } |
88 } | 88 } |
89 } | 89 } |
90 | 90 |
91 } // namespace media | 91 } // namespace media |
OLD | NEW |