Angus Kong | ed15d1a | 2013-08-19 15:06:12 -0700 | [diff] [blame] | 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 | package com.android.camera; |
| 18 | |
| 19 | import java.text.SimpleDateFormat; |
| 20 | import java.util.Date; |
| 21 | |
| 22 | public class PanoUtil { |
| 23 | public static String createName(String format, long dateTaken) { |
| 24 | Date date = new Date(dateTaken); |
| 25 | SimpleDateFormat dateFormat = new SimpleDateFormat(format); |
| 26 | return dateFormat.format(date); |
| 27 | } |
| 28 | |
| 29 | // TODO: Add comments about the range of these two arguments. |
| 30 | public static double calculateDifferenceBetweenAngles(double firstAngle, |
| 31 | double secondAngle) { |
| 32 | double difference1 = (secondAngle - firstAngle) % 360; |
| 33 | if (difference1 < 0) { |
| 34 | difference1 += 360; |
| 35 | } |
| 36 | |
| 37 | double difference2 = (firstAngle - secondAngle) % 360; |
| 38 | if (difference2 < 0) { |
| 39 | difference2 += 360; |
| 40 | } |
| 41 | |
| 42 | return Math.min(difference1, difference2); |
| 43 | } |
| 44 | |
| 45 | public static void decodeYUV420SPQuarterRes(int[] rgb, byte[] yuv420sp, int width, int height) { |
| 46 | final int frameSize = width * height; |
| 47 | |
| 48 | for (int j = 0, ypd = 0; j < height; j += 4) { |
| 49 | int uvp = frameSize + (j >> 1) * width, u = 0, v = 0; |
| 50 | for (int i = 0; i < width; i += 4, ypd++) { |
| 51 | int y = (0xff & (yuv420sp[j * width + i])) - 16; |
| 52 | if (y < 0) { |
| 53 | y = 0; |
| 54 | } |
| 55 | if ((i & 1) == 0) { |
| 56 | v = (0xff & yuv420sp[uvp++]) - 128; |
| 57 | u = (0xff & yuv420sp[uvp++]) - 128; |
| 58 | uvp += 2; // Skip the UV values for the 4 pixels skipped in between |
| 59 | } |
| 60 | int y1192 = 1192 * y; |
| 61 | int r = (y1192 + 1634 * v); |
| 62 | int g = (y1192 - 833 * v - 400 * u); |
| 63 | int b = (y1192 + 2066 * u); |
| 64 | |
| 65 | if (r < 0) { |
| 66 | r = 0; |
| 67 | } else if (r > 262143) { |
| 68 | r = 262143; |
| 69 | } |
| 70 | if (g < 0) { |
| 71 | g = 0; |
| 72 | } else if (g > 262143) { |
| 73 | g = 262143; |
| 74 | } |
| 75 | if (b < 0) { |
| 76 | b = 0; |
| 77 | } else if (b > 262143) { |
| 78 | b = 262143; |
| 79 | } |
| 80 | |
| 81 | rgb[ypd] = 0xff000000 | ((r << 6) & 0xff0000) | ((g >> 2) & 0xff00) | |
| 82 | ((b >> 10) & 0xff); |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | } |