ImageModel.java revision 6be18bedb5b87dbbcdb54f37d5a0945bd0f71377 
1/*
2 * Copyright (C) 2008 Esmertec AG.
3 * Copyright (C) 2008 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.mms.model;
19
20import com.android.mms.ContentRestrictionException;
21import com.android.mms.LogTag;
22import com.android.mms.MmsConfig;
23import com.android.mms.dom.smil.SmilMediaElementImpl;
24import android.drm.mobile1.DrmException;
25import com.android.mms.drm.DrmWrapper;
26import com.android.mms.ui.UriImage;
27import com.android.mms.ui.MessageUtils;
28import com.android.mms.mms.MmsException;
29import com.android.mms.mms.pdu.PduBody;
30import com.android.mms.mms.pdu.PduPart;
31import com.android.mms.mms.pdu.PduPersister;
32
33import org.w3c.dom.events.Event;
34import org.w3c.dom.smil.ElementTime;
35
36import android.content.ContentUris;
37import android.content.Context;
38import android.graphics.Bitmap;
39import android.graphics.BitmapFactory;
40import android.net.Uri;
41import android.text.TextUtils;
42import android.util.Config;
43import android.util.Log;
44
45import java.io.FileNotFoundException;
46import java.io.IOException;
47import java.io.InputStream;
48import java.lang.ref.SoftReference;
49
50
51public class ImageModel extends RegionMediaModel {
52    private static final String TAG = "Mms/image";
53    private static final boolean DEBUG = false;
54    private static final boolean LOCAL_LOGV = DEBUG ? Config.LOGD : Config.LOGV;
55
56    private static final int THUMBNAIL_BOUNDS_LIMIT = 480;
57
58    private int mWidth;
59    private int mHeight;
60    private SoftReference<Bitmap> mBitmapCache = new SoftReference<Bitmap>(null);
61
62    public ImageModel(Context context, Uri uri, RegionModel region)
63            throws MmsException {
64        super(context, SmilHelper.ELEMENT_TAG_IMAGE, uri, region);
65        initModelFromUri(uri);
66        checkContentRestriction();
67    }
68
69    public ImageModel(Context context, String contentType, String src,
70            Uri uri, RegionModel region) throws DrmException, MmsException {
71        super(context, SmilHelper.ELEMENT_TAG_IMAGE,
72                contentType, src, uri, region);
73        decodeImageBounds();
74    }
75
76    public ImageModel(Context context, String contentType, String src,
77            DrmWrapper wrapper, RegionModel regionModel) throws IOException {
78        super(context, SmilHelper.ELEMENT_TAG_IMAGE, contentType, src,
79                wrapper, regionModel);
80    }
81
82    private void initModelFromUri(Uri uri) throws MmsException {
83        UriImage uriImage = new UriImage(mContext, uri);
84
85        mContentType = uriImage.getContentType();
86        if (TextUtils.isEmpty(mContentType)) {
87            throw new MmsException("Type of media is unknown.");
88        }
89        mSrc = uriImage.getSrc();
90        mWidth = uriImage.getWidth();
91        mHeight = uriImage.getHeight();
92
93        if (LOCAL_LOGV) {
94            Log.v(TAG, "New ImageModel created:"
95                    + " mSrc=" + mSrc
96                    + " mContentType=" + mContentType
97                    + " mUri=" + uri);
98        }
99    }
100
101    private void decodeImageBounds() throws DrmException {
102        UriImage uriImage = new UriImage(mContext, getUriWithDrmCheck());
103        mWidth = uriImage.getWidth();
104        mHeight = uriImage.getHeight();
105
106        if (LOCAL_LOGV) {
107            Log.v(TAG, "Image bounds: " + mWidth + "x" + mHeight);
108        }
109    }
110
111    // EventListener Interface
112    public void handleEvent(Event evt) {
113        if (evt.getType().equals(SmilMediaElementImpl.SMIL_MEDIA_START_EVENT)) {
114            mVisible = true;
115        } else if (mFill != ElementTime.FILL_FREEZE) {
116            mVisible = false;
117        }
118
119        notifyModelChanged(false);
120    }
121
122    public int getWidth() {
123        return mWidth;
124    }
125
126    public int getHeight() {
127        return mHeight;
128    }
129
130    protected void checkContentRestriction() throws ContentRestrictionException {
131        ContentRestriction cr = ContentRestrictionFactory.getContentRestriction();
132        cr.checkImageContentType(mContentType);
133        cr.checkResolution(mWidth, mHeight);
134    }
135
136    public Bitmap getBitmap() {
137        return internalGetBitmap(getUri());
138    }
139
140    public Bitmap getBitmapWithDrmCheck() throws DrmException {
141        return internalGetBitmap(getUriWithDrmCheck());
142    }
143
144    private Bitmap internalGetBitmap(Uri uri) {
145        Bitmap bm = mBitmapCache.get();
146        if (bm == null) {
147            try {
148                bm = createThumbnailBitmap(THUMBNAIL_BOUNDS_LIMIT, uri);
149                if (bm != null) {
150                    mBitmapCache = new SoftReference<Bitmap>(bm);
151                }
152            } catch (OutOfMemoryError ex) {
153                // fall through and return a null bitmap. The callers can handle a null
154                // result and show R.drawable.ic_missing_thumbnail_picture
155            }
156        }
157        return bm;
158    }
159
160    private Bitmap createThumbnailBitmap(int thumbnailBoundsLimit, Uri uri) {
161        int outWidth = mWidth;
162        int outHeight = mHeight;
163
164        int s = 1;
165        while ((outWidth / s > thumbnailBoundsLimit)
166                || (outHeight / s > thumbnailBoundsLimit)) {
167            s *= 2;
168        }
169        if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
170            Log.v(TAG, "createThumbnailBitmap: scale=" + s + ", w=" + outWidth / s
171                    + ", h=" + outHeight / s);
172        }
173        BitmapFactory.Options options = new BitmapFactory.Options();
174        options.inSampleSize = s;
175
176        InputStream input = null;
177        try {
178            input = mContext.getContentResolver().openInputStream(uri);
179            return BitmapFactory.decodeStream(input, null, options);
180        } catch (FileNotFoundException e) {
181            Log.e(TAG, e.getMessage(), e);
182            return null;
183        } catch (OutOfMemoryError ex) {
184            MessageUtils.writeHprofDataToFile();
185            throw ex;
186        } finally {
187            if (input != null) {
188                try {
189                    input.close();
190                } catch (IOException e) {
191                    Log.e(TAG, e.getMessage(), e);
192                }
193            }
194        }
195    }
196
197    @Override
198    public boolean getMediaResizable() {
199        return true;
200    }
201
202    @Override
203    protected void resizeMedia(int byteLimit, long messageId) throws MmsException {
204        UriImage image = new UriImage(mContext, getUri());
205        PduPart part = image.getResizedImageAsPart(
206                MmsConfig.getMaxImageWidth(),
207                MmsConfig.getMaxImageHeight(),
208                byteLimit);
209
210        PduPersister persister = PduPersister.getPduPersister(mContext);
211        this.mSize = part.getData().length;
212        Uri newUri = persister.persistPart(part, messageId);
213        setUri(newUri);
214    }
215}
216