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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.net.Uri;
20 
21 public abstract class MediaObject {
22     @SuppressWarnings("unused")
23     private static final String TAG = "MediaObject";
24     public static final long INVALID_DATA_VERSION = -1;
25 
26     // These are the bits returned from getSupportedOperations():
27     public static final int SUPPORT_DELETE = 1 << 0;
28     public static final int SUPPORT_ROTATE = 1 << 1;
29     public static final int SUPPORT_SHARE = 1 << 2;
30     public static final int SUPPORT_CROP = 1 << 3;
31     public static final int SUPPORT_SHOW_ON_MAP = 1 << 4;
32     public static final int SUPPORT_SETAS = 1 << 5;
33     public static final int SUPPORT_FULL_IMAGE = 1 << 6;
34     public static final int SUPPORT_PLAY = 1 << 7;
35     public static final int SUPPORT_CACHE = 1 << 8;
36     public static final int SUPPORT_EDIT = 1 << 9;
37     public static final int SUPPORT_INFO = 1 << 10;
38     public static final int SUPPORT_TRIM = 1 << 11;
39     public static final int SUPPORT_UNLOCK = 1 << 12;
40     public static final int SUPPORT_BACK = 1 << 13;
41     public static final int SUPPORT_ACTION = 1 << 14;
42     public static final int SUPPORT_CAMERA_SHORTCUT = 1 << 15;
43     public static final int SUPPORT_MUTE = 1 << 16;
44     public static final int SUPPORT_PRINT = 1 << 17;
45     public static final int SUPPORT_ALL = 0xffffffff;
46 
47     // These are the bits returned from getMediaType():
48     public static final int MEDIA_TYPE_UNKNOWN = 1;
49     public static final int MEDIA_TYPE_IMAGE = 2;
50     public static final int MEDIA_TYPE_VIDEO = 4;
51     public static final int MEDIA_TYPE_ALL = MEDIA_TYPE_IMAGE | MEDIA_TYPE_VIDEO;
52 
53     public static final String MEDIA_TYPE_IMAGE_STRING = "image";
54     public static final String MEDIA_TYPE_VIDEO_STRING = "video";
55     public static final String MEDIA_TYPE_ALL_STRING = "all";
56 
57     // These are flags for cache() and return values for getCacheFlag():
58     public static final int CACHE_FLAG_NO = 0;
59     public static final int CACHE_FLAG_SCREENNAIL = 1;
60     public static final int CACHE_FLAG_FULL = 2;
61 
62     // These are return values for getCacheStatus():
63     public static final int CACHE_STATUS_NOT_CACHED = 0;
64     public static final int CACHE_STATUS_CACHING = 1;
65     public static final int CACHE_STATUS_CACHED_SCREENNAIL = 2;
66     public static final int CACHE_STATUS_CACHED_FULL = 3;
67 
68     private static long sVersionSerial = 0;
69 
70     protected long mDataVersion;
71 
72     protected final Path mPath;
73 
74     public interface PanoramaSupportCallback {
panoramaInfoAvailable(MediaObject mediaObject, boolean isPanorama, boolean isPanorama360)75         void panoramaInfoAvailable(MediaObject mediaObject, boolean isPanorama,
76                 boolean isPanorama360);
77     }
78 
MediaObject(Path path, long version)79     public MediaObject(Path path, long version) {
80         path.setObject(this);
81         mPath = path;
82         mDataVersion = version;
83     }
84 
getPath()85     public Path getPath() {
86         return mPath;
87     }
88 
getSupportedOperations()89     public int getSupportedOperations() {
90         return 0;
91     }
92 
getPanoramaSupport(PanoramaSupportCallback callback)93     public void getPanoramaSupport(PanoramaSupportCallback callback) {
94         callback.panoramaInfoAvailable(this, false, false);
95     }
96 
clearCachedPanoramaSupport()97     public void clearCachedPanoramaSupport() {
98     }
99 
delete()100     public void delete() {
101         throw new UnsupportedOperationException();
102     }
103 
rotate(int degrees)104     public void rotate(int degrees) {
105         throw new UnsupportedOperationException();
106     }
107 
getContentUri()108     public Uri getContentUri() {
109         String className = getClass().getName();
110         Log.e(TAG, "Class " + className + "should implement getContentUri.");
111         Log.e(TAG, "The object was created from path: " + getPath());
112         throw new UnsupportedOperationException();
113     }
114 
getPlayUri()115     public Uri getPlayUri() {
116         throw new UnsupportedOperationException();
117     }
118 
getMediaType()119     public int getMediaType() {
120         return MEDIA_TYPE_UNKNOWN;
121     }
122 
getDetails()123     public MediaDetails getDetails() {
124         MediaDetails details = new MediaDetails();
125         return details;
126     }
127 
getDataVersion()128     public long getDataVersion() {
129         return mDataVersion;
130     }
131 
getCacheFlag()132     public int getCacheFlag() {
133         return CACHE_FLAG_NO;
134     }
135 
getCacheStatus()136     public int getCacheStatus() {
137         throw new UnsupportedOperationException();
138     }
139 
getCacheSize()140     public long getCacheSize() {
141         throw new UnsupportedOperationException();
142     }
143 
cache(int flag)144     public void cache(int flag) {
145         throw new UnsupportedOperationException();
146     }
147 
nextVersionNumber()148     public static synchronized long nextVersionNumber() {
149         return ++MediaObject.sVersionSerial;
150     }
151 
getTypeFromString(String s)152     public static int getTypeFromString(String s) {
153         if (MEDIA_TYPE_ALL_STRING.equals(s)) return MediaObject.MEDIA_TYPE_ALL;
154         if (MEDIA_TYPE_IMAGE_STRING.equals(s)) return MediaObject.MEDIA_TYPE_IMAGE;
155         if (MEDIA_TYPE_VIDEO_STRING.equals(s)) return MediaObject.MEDIA_TYPE_VIDEO;
156         throw new IllegalArgumentException(s);
157     }
158 
getTypeString(int type)159     public static String getTypeString(int type) {
160         switch (type) {
161             case MEDIA_TYPE_IMAGE: return MEDIA_TYPE_IMAGE_STRING;
162             case MEDIA_TYPE_VIDEO: return MEDIA_TYPE_VIDEO_STRING;
163             case MEDIA_TYPE_ALL: return MEDIA_TYPE_ALL_STRING;
164         }
165         throw new IllegalArgumentException();
166     }
167 }
168