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
17package android.media;
18
19import java.util.List;
20import java.util.ArrayList;
21
22/**
23 * {@hide}
24 *
25 * The DecoderCapabilities class is used to retrieve the types of the
26 * video and audio decoder(s) supported on a specific Android platform.
27 */
28public class DecoderCapabilities
29{
30    /**
31     * The VideoDecoder class represents the type of a video decoder
32     *
33     */
34    public enum VideoDecoder {
35        VIDEO_DECODER_WMV,
36    };
37
38    /**
39     * The AudioDecoder class represents the type of an audio decoder
40     */
41    public enum AudioDecoder {
42        AUDIO_DECODER_WMA,
43    };
44
45    static {
46        System.loadLibrary("media_jni");
47        native_init();
48    }
49
50    /**
51     * Returns the list of video decoder types
52     * @see android.media.DecoderCapabilities.VideoDecoder
53     */
54    public static List<VideoDecoder> getVideoDecoders() {
55        List<VideoDecoder> decoderList = new ArrayList<VideoDecoder>();
56        int nDecoders = native_get_num_video_decoders();
57        for (int i = 0; i < nDecoders; ++i) {
58            decoderList.add(VideoDecoder.values()[native_get_video_decoder_type(i)]);
59        }
60        return decoderList;
61    }
62
63    /**
64     * Returns the list of audio decoder types
65     * @see android.media.DecoderCapabilities.AudioDecoder
66     */
67    public static List<AudioDecoder> getAudioDecoders() {
68        List<AudioDecoder> decoderList = new ArrayList<AudioDecoder>();
69        int nDecoders = native_get_num_audio_decoders();
70        for (int i = 0; i < nDecoders; ++i) {
71            decoderList.add(AudioDecoder.values()[native_get_audio_decoder_type(i)]);
72        }
73        return decoderList;
74    }
75
76    private DecoderCapabilities() {}  // Don't call me
77
78    // Implemented by JNI
79    private static native final void native_init();
80    private static native final int native_get_num_video_decoders();
81    private static native final int native_get_video_decoder_type(int index);
82    private static native final int native_get_num_audio_decoders();
83    private static native final int native_get_audio_decoder_type(int index);
84}
85