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