ImageModel.java revision bbc5b8d0076b0cdae851bfec636a854ef77bd6ce 
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.ExceedMessageSizeException;
22import com.android.mms.LogTag;
23import com.android.mms.MmsConfig;
24import com.android.mms.dom.smil.SmilMediaElementImpl;
25import android.drm.mobile1.DrmException;
26import com.android.mms.drm.DrmWrapper;
27import com.android.mms.ui.UriImage;
28import com.android.mms.ui.MessageUtils;
29
30import com.google.android.mms.ContentType;
31import com.google.android.mms.MmsException;
32import com.google.android.mms.pdu.PduPart;
33import com.google.android.mms.pdu.PduPersister;
34
35import org.w3c.dom.events.Event;
36import org.w3c.dom.smil.ElementTime;
37
38import android.content.Context;
39import android.graphics.Bitmap;
40import android.graphics.BitmapFactory;
41import android.net.Uri;
42import android.text.TextUtils;
43import android.util.Log;
44
45import java.io.FileNotFoundException;
46import java.io.IOException;
47import java.io.InputStream;
48import java.lang.ref.SoftReference;
49import java.util.Arrays;
50import java.util.HashSet;
51import java.util.Set;
52
53
54public class ImageModel extends RegionMediaModel {
55    @SuppressWarnings("hiding")
56    private static final String TAG = "Mms/image";
57    private static final boolean DEBUG = false;
58    private static final boolean LOCAL_LOGV = false;
59
60    private static final int THUMBNAIL_BOUNDS_LIMIT = 480;
61
62    /**
63     * These are the image content types that MMS supports. Anything else needs to be transcoded
64     * into one of these content types before being sent over MMS.
65     */
66    private static final Set<String> SUPPORTED_MMS_IMAGE_CONTENT_TYPES =
67        new HashSet<String>(Arrays.asList(new String[] {
68                "image/jpeg",
69            }));
70
71    private int mWidth;
72    private int mHeight;
73    private SoftReference<Bitmap> mBitmapCache = new SoftReference<Bitmap>(null);
74
75    public ImageModel(Context context, Uri uri, RegionModel region)
76            throws MmsException {
77        super(context, SmilHelper.ELEMENT_TAG_IMAGE, uri, region);
78        initModelFromUri(uri);
79        checkContentRestriction();
80    }
81
82    public ImageModel(Context context, String contentType, String src,
83            Uri uri, RegionModel region) throws DrmException, MmsException {
84        super(context, SmilHelper.ELEMENT_TAG_IMAGE,
85                contentType, src, uri, region);
86        decodeImageBounds();
87    }
88
89    public ImageModel(Context context, String contentType, String src,
90            DrmWrapper wrapper, RegionModel regionModel) throws IOException {
91        super(context, SmilHelper.ELEMENT_TAG_IMAGE, contentType, src,
92                wrapper, regionModel);
93    }
94
95    private void initModelFromUri(Uri uri) throws MmsException {
96        UriImage uriImage = new UriImage(mContext, uri);
97
98        mContentType = uriImage.getContentType();
99        if (TextUtils.isEmpty(mContentType)) {
100            throw new MmsException("Type of media is unknown.");
101        }
102        mSrc = uriImage.getSrc();
103        mWidth = uriImage.getWidth();
104        mHeight = uriImage.getHeight();
105
106        if (LOCAL_LOGV) {
107            Log.v(TAG, "New ImageModel created:"
108                    + " mSrc=" + mSrc
109                    + " mContentType=" + mContentType
110                    + " mUri=" + uri);
111        }
112    }
113
114    private void decodeImageBounds() throws DrmException {
115        UriImage uriImage = new UriImage(mContext, getUriWithDrmCheck());
116        mWidth = uriImage.getWidth();
117        mHeight = uriImage.getHeight();
118
119        if (LOCAL_LOGV) {
120            Log.v(TAG, "Image bounds: " + mWidth + "x" + mHeight);
121        }
122    }
123
124    // EventListener Interface
125    @Override
126    public void handleEvent(Event evt) {
127        if (evt.getType().equals(SmilMediaElementImpl.SMIL_MEDIA_START_EVENT)) {
128            mVisible = true;
129        } else if (mFill != ElementTime.FILL_FREEZE) {
130            mVisible = false;
131        }
132
133        notifyModelChanged(false);
134    }
135
136    public int getWidth() {
137        return mWidth;
138    }
139
140    public int getHeight() {
141        return mHeight;
142    }
143
144    protected void checkContentRestriction() throws ContentRestrictionException {
145        ContentRestriction cr = ContentRestrictionFactory.getContentRestriction();
146        cr.checkImageContentType(mContentType);
147    }
148
149    public Bitmap getBitmap() {
150        return internalGetBitmap(getUri());
151    }
152
153    public Bitmap getBitmapWithDrmCheck() throws DrmException {
154        return internalGetBitmap(getUriWithDrmCheck());
155    }
156
157    private Bitmap internalGetBitmap(Uri uri) {
158        Bitmap bm = mBitmapCache.get();
159        if (bm == null) {
160            try {
161                bm = createThumbnailBitmap(THUMBNAIL_BOUNDS_LIMIT, uri);
162                if (bm != null) {
163                    mBitmapCache = new SoftReference<Bitmap>(bm);
164                }
165            } catch (OutOfMemoryError ex) {
166                // fall through and return a null bitmap. The callers can handle a null
167                // result and show R.drawable.ic_missing_thumbnail_picture
168            }
169        }
170        return bm;
171    }
172
173    private Bitmap createThumbnailBitmap(int thumbnailBoundsLimit, Uri uri) {
174        int outWidth = mWidth;
175        int outHeight = mHeight;
176
177        int s = 1;
178        while ((outWidth / s > thumbnailBoundsLimit)
179                || (outHeight / s > thumbnailBoundsLimit)) {
180            s *= 2;
181        }
182        if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
183            Log.v(TAG, "createThumbnailBitmap: scale=" + s + ", w=" + outWidth / s
184                    + ", h=" + outHeight / s);
185        }
186        BitmapFactory.Options options = new BitmapFactory.Options();
187        options.inSampleSize = s;
188
189        InputStream input = null;
190        try {
191            input = mContext.getContentResolver().openInputStream(uri);
192            return BitmapFactory.decodeStream(input, null, options);
193        } catch (FileNotFoundException e) {
194            Log.e(TAG, e.getMessage(), e);
195            return null;
196        } catch (OutOfMemoryError ex) {
197            if (DEBUG) {
198                MessageUtils.writeHprofDataToFile();
199            }
200            throw ex;
201        } finally {
202            if (input != null) {
203                try {
204                    input.close();
205                } catch (IOException e) {
206                    Log.e(TAG, e.getMessage(), e);
207                }
208            }
209        }
210    }
211
212    @Override
213    public boolean getMediaResizable() {
214        return true;
215    }
216
217    @Override
218    protected void resizeMedia(int byteLimit, long messageId) throws MmsException {
219        UriImage image = new UriImage(mContext, getUri());
220
221        int widthLimit = MmsConfig.getMaxImageWidth();
222        int heightLimit = MmsConfig.getMaxImageHeight();
223        // In mms_config.xml, the max width has always been declared larger than the max height.
224        // Swap the width and height limits if necessary so we scale the picture as little as
225        // possible.
226        if (image.getHeight() > image.getWidth()) {
227            int temp = widthLimit;
228            widthLimit = heightLimit;
229            heightLimit = temp;
230        }
231
232        // Check if we're already within the limits - in which case we don't need to resize
233        if (getMediaSize() <= byteLimit &&
234                image.getWidth() <= widthLimit &&
235                image.getHeight() <= heightLimit &&
236                SUPPORTED_MMS_IMAGE_CONTENT_TYPES.contains(image.getContentType())) {
237            return;
238        }
239
240        PduPart part = image.getResizedImageAsPart(
241                widthLimit,
242                heightLimit,
243                byteLimit);
244
245        if (part == null) {
246            throw new ExceedMessageSizeException("Not enough memory to turn image into part: " +
247                    getUri());
248        }
249
250        // Update the content type because it may have changed due to resizing/recompressing
251        mContentType = new String(part.getContentType());
252
253        String src = getSrc();
254        byte[] srcBytes = src.getBytes();
255        part.setContentLocation(srcBytes);
256        int period = src.lastIndexOf(".");
257        byte[] contentId = period != -1 ? src.substring(0, period).getBytes() : srcBytes;
258        part.setContentId(contentId);
259
260        PduPersister persister = PduPersister.getPduPersister(mContext);
261        this.mSize = part.getData().length;
262        Uri newUri = persister.persistPart(part, messageId);
263        setUri(newUri);
264    }
265}
266