1 /*
2  * Copyright (C) 2009 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 #ifndef IMEDIA_EXTRACTOR_BASE_H_
18 
19 #define IMEDIA_EXTRACTOR_BASE_H_
20 
21 #include <media/IMediaSource.h>
22 #include <media/stagefright/DataSource.h>
23 
24 namespace android {
25 
26 class MetaData;
27 
28 class IMediaExtractor : public IInterface {
29 public:
30     DECLARE_META_INTERFACE(MediaExtractor);
31 
32     virtual size_t countTracks() = 0;
33     virtual sp<IMediaSource> getTrack(size_t index) = 0;
34 
35     enum GetTrackMetaDataFlags {
36         kIncludeExtensiveMetaData = 1
37     };
38     virtual sp<MetaData> getTrackMetaData(
39             size_t index, uint32_t flags = 0) = 0;
40 
41     // Return container specific meta-data. The default implementation
42     // returns an empty metadata object.
43     virtual sp<MetaData> getMetaData() = 0;
44 
45     enum Flags {
46         CAN_SEEK_BACKWARD  = 1,  // the "seek 10secs back button"
47         CAN_SEEK_FORWARD   = 2,  // the "seek 10secs forward button"
48         CAN_PAUSE          = 4,
49         CAN_SEEK           = 8,  // the "seek bar"
50     };
51 
52     // If subclasses do _not_ override this, the default is
53     // CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK | CAN_PAUSE
54     virtual uint32_t flags() const = 0;
55 
56     // for DRM
57     virtual void setDrmFlag(bool flag) = 0;
58     virtual bool getDrmFlag() = 0;
59     virtual char* getDrmTrackInfo(size_t trackID, int *len)  = 0;
60     virtual void setUID(uid_t uid)  = 0;
61 
62     virtual const char * name() = 0;
63 };
64 
65 
66 class BnMediaExtractor: public BnInterface<IMediaExtractor>
67 {
68 public:
69     virtual status_t    onTransact(uint32_t code, const Parcel& data, Parcel* reply,
70                                 uint32_t flags = 0);
71 };
72 
73 void registerMediaExtractor(
74         const sp<IMediaExtractor> &extractor,
75         const sp<DataSource> &source,
76         const char *mime);
77 
78 void registerMediaSource(
79         const sp<IMediaExtractor> &extractor,
80         const sp<IMediaSource> &source);
81 
82 status_t dumpExtractors(int fd, const Vector<String16>& args);
83 
84 
85 }  // namespace android
86 
87 #endif  // IMEDIA_EXTRACTOR_BASE_H_
88