1/* 2 * Copyright (C) 2010 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 17package com.android.gallery3d.data; 18 19import android.graphics.Bitmap; 20import android.graphics.BitmapRegionDecoder; 21 22import com.android.gallery3d.common.ApiHelper; 23import com.android.gallery3d.ui.ScreenNail; 24import com.android.gallery3d.util.ThreadPool.Job; 25 26// MediaItem represents an image or a video item. 27public abstract class MediaItem extends MediaObject { 28 // NOTE: These type numbers are stored in the image cache, so it should not 29 // not be changed without resetting the cache. 30 public static final int TYPE_THUMBNAIL = 1; 31 public static final int TYPE_MICROTHUMBNAIL = 2; 32 33 public static final int CACHED_IMAGE_QUALITY = 95; 34 35 public static final int IMAGE_READY = 0; 36 public static final int IMAGE_WAIT = 1; 37 public static final int IMAGE_ERROR = -1; 38 39 public static final String MIME_TYPE_JPEG = "image/jpeg"; 40 41 private static final int BYTESBUFFE_POOL_SIZE = 4; 42 private static final int BYTESBUFFER_SIZE = 200 * 1024; 43 44 private static int sMicrothumbnailTargetSize = 200; 45 private static BitmapPool sMicroThumbPool; 46 private static final BytesBufferPool sMicroThumbBufferPool = 47 new BytesBufferPool(BYTESBUFFE_POOL_SIZE, BYTESBUFFER_SIZE); 48 49 private static int sThumbnailTargetSize = 640; 50 private static final BitmapPool sThumbPool = 51 ApiHelper.HAS_REUSING_BITMAP_IN_BITMAP_FACTORY 52 ? new BitmapPool(4) 53 : null; 54 55 // TODO: fix default value for latlng and change this. 56 public static final double INVALID_LATLNG = 0f; 57 58 public abstract Job<Bitmap> requestImage(int type); 59 public abstract Job<BitmapRegionDecoder> requestLargeImage(); 60 61 public MediaItem(Path path, long version) { 62 super(path, version); 63 } 64 65 public long getDateInMs() { 66 return 0; 67 } 68 69 public String getName() { 70 return null; 71 } 72 73 public void getLatLong(double[] latLong) { 74 latLong[0] = INVALID_LATLNG; 75 latLong[1] = INVALID_LATLNG; 76 } 77 78 public String[] getTags() { 79 return null; 80 } 81 82 public Face[] getFaces() { 83 return null; 84 } 85 86 // The rotation of the full-resolution image. By default, it returns the value of 87 // getRotation(). 88 public int getFullImageRotation() { 89 return getRotation(); 90 } 91 92 public int getRotation() { 93 return 0; 94 } 95 96 public long getSize() { 97 return 0; 98 } 99 100 public abstract String getMimeType(); 101 102 public String getFilePath() { 103 return ""; 104 } 105 106 // Returns width and height of the media item. 107 // Returns 0, 0 if the information is not available. 108 public abstract int getWidth(); 109 public abstract int getHeight(); 110 111 // This is an alternative for requestImage() in PhotoPage. If this 112 // is implemented, you don't need to implement requestImage(). 113 public ScreenNail getScreenNail() { 114 return null; 115 } 116 117 public static int getTargetSize(int type) { 118 switch (type) { 119 case TYPE_THUMBNAIL: 120 return sThumbnailTargetSize; 121 case TYPE_MICROTHUMBNAIL: 122 return sMicrothumbnailTargetSize; 123 default: 124 throw new RuntimeException( 125 "should only request thumb/microthumb from cache"); 126 } 127 } 128 129 public static BitmapPool getMicroThumbPool() { 130 if (ApiHelper.HAS_REUSING_BITMAP_IN_BITMAP_FACTORY && sMicroThumbPool == null) { 131 initializeMicroThumbPool(); 132 } 133 return sMicroThumbPool; 134 } 135 136 public static BitmapPool getThumbPool() { 137 return sThumbPool; 138 } 139 140 public static BytesBufferPool getBytesBufferPool() { 141 return sMicroThumbBufferPool; 142 } 143 144 private static void initializeMicroThumbPool() { 145 sMicroThumbPool = 146 ApiHelper.HAS_REUSING_BITMAP_IN_BITMAP_FACTORY 147 ? new BitmapPool(sMicrothumbnailTargetSize, sMicrothumbnailTargetSize, 16) 148 : null; 149 } 150 151 public static void setThumbnailSizes(int size, int microSize) { 152 sThumbnailTargetSize = size; 153 if (sMicrothumbnailTargetSize != microSize) { 154 sMicrothumbnailTargetSize = microSize; 155 initializeMicroThumbPool(); 156 } 157 } 158} 159