1 /* 2 * Copyright (C) 2011 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 /* 18 * Contains implemenation of framebuffer conversion routines. 19 */ 20 21 #define LOG_NDEBUG 0 22 #define LOG_TAG "EmulatedCamera_Converter" 23 #include <cutils/log.h> 24 #include "Converters.h" 25 26 namespace android { 27 28 static void _YUV420SToRGB565(const uint8_t* Y, 29 const uint8_t* U, 30 const uint8_t* V, 31 int dUV, 32 uint16_t* rgb, 33 int width, 34 int height) 35 { 36 const uint8_t* U_pos = U; 37 const uint8_t* V_pos = V; 38 39 for (int y = 0; y < height; y++) { 40 for (int x = 0; x < width; x += 2, U += dUV, V += dUV) { 41 const uint8_t nU = *U; 42 const uint8_t nV = *V; 43 *rgb = YUVToRGB565(*Y, nU, nV); 44 Y++; rgb++; 45 *rgb = YUVToRGB565(*Y, nU, nV); 46 Y++; rgb++; 47 } 48 if (y & 0x1) { 49 U_pos = U; 50 V_pos = V; 51 } else { 52 U = U_pos; 53 V = V_pos; 54 } 55 } 56 } 57 58 static void _YUV420SToRGB32(const uint8_t* Y, 59 const uint8_t* U, 60 const uint8_t* V, 61 int dUV, 62 uint32_t* rgb, 63 int width, 64 int height) 65 { 66 const uint8_t* U_pos = U; 67 const uint8_t* V_pos = V; 68 69 for (int y = 0; y < height; y++) { 70 for (int x = 0; x < width; x += 2, U += dUV, V += dUV) { 71 const uint8_t nU = *U; 72 const uint8_t nV = *V; 73 *rgb = YUVToRGB32(*Y, nU, nV); 74 Y++; rgb++; 75 *rgb = YUVToRGB32(*Y, nU, nV); 76 Y++; rgb++; 77 } 78 if (y & 0x1) { 79 U_pos = U; 80 V_pos = V; 81 } else { 82 U = U_pos; 83 V = V_pos; 84 } 85 } 86 } 87 88 void YV12ToRGB565(const void* yv12, void* rgb, int width, int height) 89 { 90 const int pix_total = width * height; 91 const uint8_t* Y = reinterpret_cast<const uint8_t*>(yv12); 92 const uint8_t* U = Y + pix_total; 93 const uint8_t* V = U + pix_total / 4; 94 _YUV420SToRGB565(Y, U, V, 1, reinterpret_cast<uint16_t*>(rgb), width, height); 95 } 96 97 void YV12ToRGB32(const void* yv12, void* rgb, int width, int height) 98 { 99 const int pix_total = width * height; 100 const uint8_t* Y = reinterpret_cast<const uint8_t*>(yv12); 101 const uint8_t* V = Y + pix_total; 102 const uint8_t* U = V + pix_total / 4; 103 _YUV420SToRGB32(Y, U, V, 1, reinterpret_cast<uint32_t*>(rgb), width, height); 104 } 105 106 void YU12ToRGB32(const void* yu12, void* rgb, int width, int height) 107 { 108 const int pix_total = width * height; 109 const uint8_t* Y = reinterpret_cast<const uint8_t*>(yu12); 110 const uint8_t* U = Y + pix_total; 111 const uint8_t* V = U + pix_total / 4; 112 _YUV420SToRGB32(Y, U, V, 1, reinterpret_cast<uint32_t*>(rgb), width, height); 113 } 114 115 /* Common converter for YUV 4:2:0 interleaved to RGB565. 116 * y, u, and v point to Y,U, and V panes, where U and V values are interleaved. 117 */ 118 static void _NVXXToRGB565(const uint8_t* Y, 119 const uint8_t* U, 120 const uint8_t* V, 121 uint16_t* rgb, 122 int width, 123 int height) 124 { 125 _YUV420SToRGB565(Y, U, V, 2, rgb, width, height); 126 } 127 128 /* Common converter for YUV 4:2:0 interleaved to RGB32. 129 * y, u, and v point to Y,U, and V panes, where U and V values are interleaved. 130 */ 131 static void _NVXXToRGB32(const uint8_t* Y, 132 const uint8_t* U, 133 const uint8_t* V, 134 uint32_t* rgb, 135 int width, 136 int height) 137 { 138 _YUV420SToRGB32(Y, U, V, 2, rgb, width, height); 139 } 140 141 void NV12ToRGB565(const void* nv12, void* rgb, int width, int height) 142 { 143 const int pix_total = width * height; 144 const uint8_t* y = reinterpret_cast<const uint8_t*>(nv12); 145 _NVXXToRGB565(y, y + pix_total, y + pix_total + 1, 146 reinterpret_cast<uint16_t*>(rgb), width, height); 147 } 148 149 void NV12ToRGB32(const void* nv12, void* rgb, int width, int height) 150 { 151 const int pix_total = width * height; 152 const uint8_t* y = reinterpret_cast<const uint8_t*>(nv12); 153 _NVXXToRGB32(y, y + pix_total, y + pix_total + 1, 154 reinterpret_cast<uint32_t*>(rgb), width, height); 155 } 156 157 void NV21ToRGB565(const void* nv21, void* rgb, int width, int height) 158 { 159 const int pix_total = width * height; 160 const uint8_t* y = reinterpret_cast<const uint8_t*>(nv21); 161 _NVXXToRGB565(y, y + pix_total + 1, y + pix_total, 162 reinterpret_cast<uint16_t*>(rgb), width, height); 163 } 164 165 void NV21ToRGB32(const void* nv21, void* rgb, int width, int height) 166 { 167 const int pix_total = width * height; 168 const uint8_t* y = reinterpret_cast<const uint8_t*>(nv21); 169 _NVXXToRGB32(y, y + pix_total + 1, y + pix_total, 170 reinterpret_cast<uint32_t*>(rgb), width, height); 171 } 172 173 }; /* namespace android */ 174
