mediametadataretriever.h revision 2256d515e6fa1dd95b8fd0de05b56d8c83af8327 
1/*
2 * Copyright (C) 2008 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
17
18#ifndef MEDIAMETADATARETRIEVER_H
19#define MEDIAMETADATARETRIEVER_H
20
21#include <utils/Errors.h>  // for status_t
22#include <utils/threads.h>
23#include <binder/IMemory.h>
24#include <media/IMediaMetadataRetriever.h>
25
26namespace android {
27
28class IMediaPlayerService;
29class IMediaMetadataRetriever;
30
31// Keep these in synch with the constants defined in MediaMetadataRetriever.java
32// class.
33enum {
34    METADATA_KEY_CD_TRACK_NUMBER = 0,
35    METADATA_KEY_ALBUM           = 1,
36    METADATA_KEY_ARTIST          = 2,
37    METADATA_KEY_AUTHOR          = 3,
38    METADATA_KEY_COMPOSER        = 4,
39    METADATA_KEY_DATE            = 5,
40    METADATA_KEY_GENRE           = 6,
41    METADATA_KEY_TITLE           = 7,
42    METADATA_KEY_YEAR            = 8,
43    METADATA_KEY_DURATION        = 9,
44    METADATA_KEY_NUM_TRACKS      = 10,
45    METADATA_KEY_WRITER          = 11,
46    METADATA_KEY_MIMETYPE        = 12,
47    METADATA_KEY_ALBUMARTIST     = 13,
48    METADATA_KEY_DISC_NUMBER     = 14,
49    METADATA_KEY_COMPILATION     = 15,
50    METADATA_KEY_HAS_AUDIO       = 16,
51    METADATA_KEY_HAS_VIDEO       = 17,
52    METADATA_KEY_VIDEO_WIDTH     = 18,
53    METADATA_KEY_VIDEO_HEIGHT    = 19,
54    METADATA_KEY_BITRATE         = 20,
55
56    // Add more here...
57};
58
59class MediaMetadataRetriever: public RefBase
60{
61public:
62    MediaMetadataRetriever();
63    ~MediaMetadataRetriever();
64    void disconnect();
65    status_t setDataSource(const char* dataSourceUrl);
66    status_t setDataSource(int fd, int64_t offset, int64_t length);
67    sp<IMemory> getFrameAtTime(int64_t timeUs, int option);
68    sp<IMemory> extractAlbumArt();
69    const char* extractMetadata(int keyCode);
70
71private:
72    static const sp<IMediaPlayerService>& getService();
73
74    class DeathNotifier: public IBinder::DeathRecipient
75    {
76    public:
77        DeathNotifier() {}
78        virtual ~DeathNotifier();
79        virtual void binderDied(const wp<IBinder>& who);
80    };
81
82    static sp<DeathNotifier>                  sDeathNotifier;
83    static Mutex                              sServiceLock;
84    static sp<IMediaPlayerService>            sService;
85
86    Mutex                                     mLock;
87    sp<IMediaMetadataRetriever>               mRetriever;
88
89};
90
91}; // namespace android
92
93#endif // MEDIAMETADATARETRIEVER_H
94