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.common.ApiHelper; 23 import com.android.gallery3d.ui.ScreenNail; 24 import com.android.gallery3d.util.ThreadPool.Job; 25 26 // MediaItem represents an image or a video item. 27 public 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 final BytesBufferPool sMicroThumbBufferPool = 46 new BytesBufferPool(BYTESBUFFE_POOL_SIZE, BYTESBUFFER_SIZE); 47 48 private static int sThumbnailTargetSize = 640; 49 50 // TODO: fix default value for latlng and change this. 51 public static final double INVALID_LATLNG = 0f; 52 requestImage(int type)53 public abstract Job<Bitmap> requestImage(int type); requestLargeImage()54 public abstract Job<BitmapRegionDecoder> requestLargeImage(); 55 MediaItem(Path path, long version)56 public MediaItem(Path path, long version) { 57 super(path, version); 58 } 59 getDateInMs()60 public long getDateInMs() { 61 return 0; 62 } 63 getName()64 public String getName() { 65 return null; 66 } 67 getLatLong(double[] latLong)68 public void getLatLong(double[] latLong) { 69 latLong[0] = INVALID_LATLNG; 70 latLong[1] = INVALID_LATLNG; 71 } 72 getTags()73 public String[] getTags() { 74 return null; 75 } 76 getFaces()77 public Face[] getFaces() { 78 return null; 79 } 80 81 // The rotation of the full-resolution image. By default, it returns the value of 82 // getRotation(). getFullImageRotation()83 public int getFullImageRotation() { 84 return getRotation(); 85 } 86 getRotation()87 public int getRotation() { 88 return 0; 89 } 90 getSize()91 public long getSize() { 92 return 0; 93 } 94 getMimeType()95 public abstract String getMimeType(); 96 getFilePath()97 public String getFilePath() { 98 return ""; 99 } 100 101 // Returns width and height of the media item. 102 // Returns 0, 0 if the information is not available. getWidth()103 public abstract int getWidth(); getHeight()104 public abstract int getHeight(); 105 106 // This is an alternative for requestImage() in PhotoPage. If this 107 // is implemented, you don't need to implement requestImage(). getScreenNail()108 public ScreenNail getScreenNail() { 109 return null; 110 } 111 getTargetSize(int type)112 public static int getTargetSize(int type) { 113 switch (type) { 114 case TYPE_THUMBNAIL: 115 return sThumbnailTargetSize; 116 case TYPE_MICROTHUMBNAIL: 117 return sMicrothumbnailTargetSize; 118 default: 119 throw new RuntimeException( 120 "should only request thumb/microthumb from cache"); 121 } 122 } 123 getBytesBufferPool()124 public static BytesBufferPool getBytesBufferPool() { 125 return sMicroThumbBufferPool; 126 } 127 setThumbnailSizes(int size, int microSize)128 public static void setThumbnailSizes(int size, int microSize) { 129 sThumbnailTargetSize = size; 130 if (sMicrothumbnailTargetSize != microSize) { 131 sMicrothumbnailTargetSize = microSize; 132 } 133 } 134 } 135