MetadataRetrieverClient.h revision 41fbe930c0c128bcded1348e60d7d9e8f79d8a77 
1/*
2**
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
18#ifndef ANDROID_MEDIAMETADATARETRIEVERSERVICE_H
19#define ANDROID_MEDIAMETADATARETRIEVERSERVICE_H
20
21#include <utils/Log.h>
22#include <utils/threads.h>
23#include <utils/List.h>
24#include <utils/Errors.h>
25#include <utils/KeyedVector.h>
26#include <binder/IMemory.h>
27
28#include <media/MediaMetadataRetrieverInterface.h>
29
30
31namespace android {
32
33class IMediaPlayerService;
34class MemoryDealer;
35
36class MetadataRetrieverClient : public BnMediaMetadataRetriever
37{
38public:
39    MetadataRetrieverClient(const sp<IMediaPlayerService>& service, pid_t pid, int32_t connId);
40
41    // Implements IMediaMetadataRetriever interface
42    // These methods are called in IMediaMetadataRetriever.cpp?
43    virtual void                    disconnect();
44    virtual status_t                setDataSource(const char *url);
45    virtual status_t                setDataSource(int fd, int64_t offset, int64_t length);
46    virtual status_t                setMode(int mode);
47    virtual status_t                getMode(int* mode) const;
48    virtual sp<IMemory>             captureFrame();
49    virtual sp<IMemory>             extractAlbumArt();
50    virtual const char*             extractMetadata(int keyCode);
51
52    virtual status_t                dump(int fd, const Vector<String16>& args) const;
53
54private:
55    friend class MediaPlayerService;
56
57    class Priority
58    {
59    public:
60        Priority(int newPriority);
61        ~Priority();
62    private:
63        Priority();
64        int         mOldPriority;
65    };
66
67    explicit MetadataRetrieverClient(pid_t pid);
68    virtual ~MetadataRetrieverClient();
69
70    mutable Mutex                          mLock;
71    sp<MediaMetadataRetrieverBase>         mRetriever;
72    pid_t                                  mPid;
73    int                                    mMode;
74
75    // Keep the shared memory copy of album art and capture frame (for thumbnail)
76    sp<MemoryDealer>                       mAlbumArtDealer;
77    sp<MemoryDealer>                       mThumbnailDealer;
78    sp<IMemory>                            mAlbumArt;
79    sp<IMemory>                            mThumbnail;
80};
81
82}; // namespace android
83
84#endif // ANDROID_MEDIAMETADATARETRIEVERSERVICE_H
85
86