MediaMetadataRetrieverWrapper.java revision d3b009ae55651f1e60950342468e3c37fdeb0796 
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 */
16package com.android.messaging.util;
17
18import android.content.ContentResolver;
19import android.content.res.AssetFileDescriptor;
20import android.graphics.Bitmap;
21import android.media.MediaMetadataRetriever;
22import android.net.Uri;
23import android.text.TextUtils;
24
25import com.android.messaging.Factory;
26
27import java.io.IOException;
28
29/**
30 * Convenience wrapper for {@link MediaMetadataRetriever} to help with its eccentric error handling.
31 */
32public 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