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 package com.android.camera.one; 18 19 import android.hardware.camera2.params.MeteringRectangle; 20 21 /** 22 * Contains 3A parameters common to all camera flavors. TODO: Move to 23 * GservicesHelper. 24 */ 25 public class Settings3A { 26 27 /** 28 * Width of touch AF region in [0,1] relative to shorter edge of the current 29 * crop region. Multiply this number by the number of pixels along the 30 * shorter edge of the current crop region's width to get a value in pixels. 31 * <p> 32 * This value has been tested on Nexus 5 and Shamu, but will need to be 33 * tuned per device depending on how its ISP interprets the metering box and 34 * weight. 35 * 36 * <pre> 37 * Values prior to L release: 38 * Normal mode: 0.125 * longest edge 39 * Gcam: Fixed at 300px x 300px. 40 */ 41 private static final float AF_REGION_BOX = 0.2f; 42 43 /** 44 * Width of touch metering region in [0,1] relative to shorter edge of the 45 * current crop region. Multiply this number by the number of pixels along 46 * shorter edge of the current crop region's width to get a value in pixels. 47 * <p> 48 * This value has been tested on Nexus 5 and Shamu, but will need to be 49 * tuned per device depending on how its ISP interprets the metering box and 50 * weight. 51 * 52 * <pre> 53 * Values prior to L release: 54 * Normal mode: 0.1875 * longest edge 55 * Gcam: Fixed ffat 300px x 300px. 56 */ 57 private static final float AE_REGION_BOX = 0.3f; 58 59 /** 60 * Metering region weight between 0 and 1. 61 * <p> 62 * This value has been tested on Nexus 5 and Shamu, but will need to be 63 * tuned per device depending on how its ISP interprets the metering box and 64 * weight. 65 * </p> 66 */ 67 private static final float REGION_WEIGHT = 0.022f; 68 69 /** Duration to hold after manual tap to focus. */ 70 private static final int FOCUS_HOLD_MILLIS = 3000; 71 72 /** 73 * The number of milliseconds to hold tap-to-expose/metering after the last 74 * payload frame is received before returning to continuous 3A. 75 */ 76 private static final int GCAM_POST_SHOT_FOCUS_HOLD_MILLIS = 1000; 77 78 /** 79 * Width of touch metering region in [0,1] relative to shorter edge of the 80 * current crop region. Multiply this number by the number of pixels along 81 * shorter edge of the current crop region's width to get a value in pixels. 82 * <p> 83 * This value has been tested on Nexus 5 and Shamu, but will need to be 84 * tuned per device depending on how its ISP interprets the metering box and 85 * weight. 86 * </p> 87 * <p> 88 * Was fixed at 300px x 300px prior to L release. 89 * </p> 90 */ 91 private static final float GCAM_METERING_REGION_FRACTION = 0.1225f; 92 93 /** 94 * Weight of a touch metering region, in [0, \inf). 95 * <p> 96 * This value has been tested on Nexus 5 and Shamu, but will need to be 97 * tuned per device. 98 * </p> 99 * <p> 100 * Was fixed at 15.0f prior to L release. 101 * </p> 102 */ 103 private static final float GCAM_METERING_REGION_WEIGHT = 45.0f; 104 105 /** 106 * @Return The weight to use for {@link MeteringRectangle}s for 3A. 107 */ 108 public int getMeteringWeight() { 109 // TODO Determine the optimal metering region for non-HDR photos. 110 int weightMin = MeteringRectangle.METERING_WEIGHT_MIN; 111 int weightRange = MeteringRectangle.METERING_WEIGHT_MAX 112 - MeteringRectangle.METERING_WEIGHT_MIN; 113 return (int) (weightMin + GCAM_METERING_REGION_FRACTION * weightRange); 114 } 115 116 /** 117 * @return The size of (square) metering regions, normalized with respect to 118 * the smallest dimension of the current crop-region. 119 */ 120 public float getMeteringRegionFraction() { 121 // TODO Determine the optimal metering weight for non-HDR photos. 122 return GCAM_METERING_REGION_FRACTION; 123 } 124 125 @Deprecated 126 public static float getAutoFocusRegionWidth() { 127 return AF_REGION_BOX; 128 } 129 130 @Deprecated 131 public static float getMeteringRegionWidth() { 132 return AE_REGION_BOX; 133 } 134 135 @Deprecated 136 public static float getMeteringRegionWeight() { 137 return REGION_WEIGHT; 138 } 139 140 @Deprecated 141 public static float getGcamMeteringRegionFraction() { 142 return GCAM_METERING_REGION_FRACTION; 143 } 144 145 @Deprecated 146 public static float getGcamMeteringRegionWeight() { 147 return GCAM_METERING_REGION_WEIGHT; 148 } 149 150 @Deprecated 151 public static int getFocusHoldMillis() { 152 return FOCUS_HOLD_MILLIS; 153 } 154 155 @Deprecated 156 public static int getGcamPostShotFocusHoldMillis() { 157 return GCAM_POST_SHOT_FOCUS_HOLD_MILLIS; 158 } 159 } 160
