1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "ColorConvert.h" 18 19 #ifndef max 20 #define max(a,b) ((a) > (b) ? (a) : (b)) 21 #endif 22 #ifndef min 23 #define min(a,b) ((a) < (b) ? (a) : (b)) 24 #endif 25 26 namespace android { 27 28 void YUVToRGB( 29 int32_t y, int32_t u, int32_t v, 30 int32_t* r, int32_t* g, int32_t* b) { 31 y -= 16; 32 u -= 128; 33 v -= 128; 34 35 *b = 1192 * y + 2066 * u; 36 *g = 1192 * y - 833 * v - 400 * u; 37 *r = 1192 * y + 1634 * v; 38 39 *r = min(262143, max(0, *r)); 40 *g = min(262143, max(0, *g)); 41 *b = min(262143, max(0, *b)); 42 43 *r >>= 10; 44 *g >>= 10; 45 *b >>= 10; 46 } 47 48 void convertYUV420spToARGB( 49 uint8_t *pY, uint8_t *pUV, int32_t width, int32_t height, 50 uint8_t *dest) { 51 const int32_t bytes_per_pixel = 2; 52 53 for (int32_t i = 0; i < height; i++) { 54 for (int32_t j = 0; j < width; j++) { 55 int32_t y = *(pY + i * width + j); 56 int32_t u = *(pUV + (i/2) * width + bytes_per_pixel * (j/2)); 57 int32_t v = *(pUV + (i/2) * width + bytes_per_pixel * (j/2) + 1); 58 59 int32_t r, g, b; 60 YUVToRGB(y, u, v, &r, &g, &b); 61 62 *dest++ = 0xFF; 63 *dest++ = r; 64 *dest++ = g; 65 *dest++ = b; 66 } 67 } 68 } 69 70 void convertYUV420spToRGB888( 71 uint8_t *pY, uint8_t *pUV, int32_t width, int32_t height, 72 uint8_t *dest) { 73 const int32_t bytes_per_pixel = 2; 74 75 for (int32_t i = 0; i < height; i++) { 76 for (int32_t j = 0; j < width; j++) { 77 int32_t y = *(pY + i * width + j); 78 int32_t u = *(pUV + (i/2) * width + bytes_per_pixel * (j/2)); 79 int32_t v = *(pUV + (i/2) * width + bytes_per_pixel * (j/2) + 1); 80 81 int32_t r, g, b; 82 YUVToRGB(y, u, v, &r, &g, &b); 83 84 *dest++ = r; 85 *dest++ = g; 86 *dest++ = b; 87 } 88 } 89 } 90 91 // HACK - not even slightly optimized 92 // TODO: remove when RGBA support is added to SoftwareRenderer 93 void convertRGBAToARGB( 94 uint8_t *src, int32_t width, int32_t height, uint32_t stride, 95 uint8_t *dest) { 96 for (int32_t i = 0; i < height; ++i) { 97 for (int32_t j = 0; j < width; ++j) { 98 uint8_t r = *src++; 99 uint8_t g = *src++; 100 uint8_t b = *src++; 101 uint8_t a = *src++; 102 *dest++ = a; 103 *dest++ = r; 104 *dest++ = g; 105 *dest++ = b; 106 } 107 src += (stride - width) * 4; 108 } 109 } 110 111 } // namespace android 112
