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      1 /*
      2  * Copyright (C) 2015 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 package com.android.messaging.util;
     17 
     18 import android.content.ContentResolver;
     19 import android.content.res.AssetFileDescriptor;
     20 import android.graphics.Bitmap;
     21 import android.media.MediaMetadataRetriever;
     22 import android.net.Uri;
     23 import android.text.TextUtils;
     24 
     25 import com.android.messaging.Factory;
     26 
     27 import java.io.IOException;
     28 
     29 /**
     30  * Convenience wrapper for {@link MediaMetadataRetriever} to help with its eccentric error handling.
     31  */
     32 public class MediaMetadataRetrieverWrapper {
     33     private final MediaMetadataRetriever mRetriever = new MediaMetadataRetriever();
     34 
     35     public MediaMetadataRetrieverWrapper() {
     36     }
     37 
     38     public void setDataSource(Uri uri) throws IOException {
     39         ContentResolver resolver = Factory.get().getApplicationContext().getContentResolver();
     40         AssetFileDescriptor fd = resolver.openAssetFileDescriptor(uri, "r");
     41         if (fd == null) {
     42             throw new IOException("openAssetFileDescriptor returned null for " + uri);
     43         }
     44         try {
     45             mRetriever.setDataSource(fd.getFileDescriptor());
     46         } catch (RuntimeException e) {
     47             release();
     48             throw new IOException(e);
     49         } finally {
     50             fd.close();
     51         }
     52     }
     53 
     54     public int extractInteger(final int key, final int defaultValue) {
     55         final String s = mRetriever.extractMetadata(key);
     56         if (TextUtils.isEmpty(s)) {
     57             return defaultValue;
     58         }
     59         return Integer.parseInt(s);
     60     }
     61 
     62     public String extractMetadata(final int key) {
     63         return mRetriever.extractMetadata(key);
     64     }
     65 
     66     public Bitmap getFrameAtTime() {
     67         return mRetriever.getFrameAtTime();
     68     }
     69 
     70     public Bitmap getFrameAtTime(final long timeUs) {
     71         return mRetriever.getFrameAtTime(timeUs);
     72     }
     73 
     74     public void release() {
     75         try {
     76             mRetriever.release();
     77         } catch (RuntimeException e) {
     78             LogUtil.e(LogUtil.BUGLE_TAG, "MediaMetadataRetriever.release failed", e);
     79         }
     80     }
     81 }
     82