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
_YUV420SToRGB565(const uint8_t * Y,const uint8_t * U,const uint8_t * V,int dUV,uint16_t * rgb,int width,int height)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
_YUV420SToRGB32(const uint8_t * Y,const uint8_t * U,const uint8_t * V,int dUV,uint32_t * rgb,int width,int height)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
YV12ToRGB565(const void * yv12,void * rgb,int width,int height)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
YV12ToRGB32(const void * yv12,void * rgb,int width,int height)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
YU12ToRGB32(const void * yu12,void * rgb,int width,int height)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 */
_NVXXToRGB565(const uint8_t * Y,const uint8_t * U,const uint8_t * V,uint16_t * rgb,int width,int height)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 */
_NVXXToRGB32(const uint8_t * Y,const uint8_t * U,const uint8_t * V,uint32_t * rgb,int width,int height)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
NV12ToRGB565(const void * nv12,void * rgb,int width,int height)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
NV12ToRGB32(const void * nv12,void * rgb,int width,int height)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
NV21ToRGB565(const void * nv21,void * rgb,int width,int height)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
NV21ToRGB32(const void * nv21,void * rgb,int width,int height)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