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