IMediaExtractor.h revision 8253f44c3d0d8a7003dd2e6f728f9e3d63927727 
18253f44c3d0d8a7003dd2e6f728f9e3d63927727Steven Moreland/*
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
24namespace android {
25
26class MetaData;
27namespace media {
28class ICas;
29};
30using namespace media;
31
32class IMediaExtractor : public IInterface {
33public:
34    DECLARE_META_INTERFACE(MediaExtractor);
35
36    virtual size_t countTracks() = 0;
37    virtual sp<IMediaSource> getTrack(size_t index) = 0;
38
39    enum GetTrackMetaDataFlags {
40        kIncludeExtensiveMetaData = 1
41    };
42    virtual sp<MetaData> getTrackMetaData(
43            size_t index, uint32_t flags = 0) = 0;
44
45    // Return container specific meta-data. The default implementation
46    // returns an empty metadata object.
47    virtual sp<MetaData> getMetaData() = 0;
48
49    virtual status_t getMetrics(Parcel *reply) = 0;
50
51    enum Flags {
52        CAN_SEEK_BACKWARD  = 1,  // the "seek 10secs back button"
53        CAN_SEEK_FORWARD   = 2,  // the "seek 10secs forward button"
54        CAN_PAUSE          = 4,
55        CAN_SEEK           = 8,  // the "seek bar"
56    };
57
58    // If subclasses do _not_ override this, the default is
59    // CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK | CAN_PAUSE
60    virtual uint32_t flags() const = 0;
61
62    // for DRM
63    virtual char* getDrmTrackInfo(size_t trackID, int *len)  = 0;
64
65    virtual status_t setMediaCas(const sp<ICas> &cas) = 0;
66
67    virtual void setUID(uid_t uid)  = 0;
68
69    virtual const char * name() = 0;
70};
71
72
73class BnMediaExtractor: public BnInterface<IMediaExtractor>
74{
75public:
76    virtual status_t    onTransact(uint32_t code, const Parcel& data, Parcel* reply,
77                                uint32_t flags = 0);
78};
79
80void registerMediaExtractor(
81        const sp<IMediaExtractor> &extractor,
82        const sp<DataSource> &source,
83        const char *mime);
84
85void registerMediaSource(
86        const sp<IMediaExtractor> &extractor,
87        const sp<IMediaSource> &source);
88
89status_t dumpExtractors(int fd, const Vector<String16>& args);
90
91
92}  // namespace android
93
94#endif  // IMEDIA_EXTRACTOR_BASE_H_
95