IMediaExtractor.h revision ba13b7bc3d46d958bc4a395f2c162cb112ec1f3a 
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
24namespace android {
25
26class MetaData;
27
28class IMediaExtractor : public IInterface {
29public:
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    virtual status_t getMetrics(Parcel *reply) = 0;
46
47    enum Flags {
48        CAN_SEEK_BACKWARD  = 1,  // the "seek 10secs back button"
49        CAN_SEEK_FORWARD   = 2,  // the "seek 10secs forward button"
50        CAN_PAUSE          = 4,
51        CAN_SEEK           = 8,  // the "seek bar"
52    };
53
54    // If subclasses do _not_ override this, the default is
55    // CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK | CAN_PAUSE
56    virtual uint32_t flags() const = 0;
57
58    // for DRM
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
66class BnMediaExtractor: public BnInterface<IMediaExtractor>
67{
68public:
69    virtual status_t    onTransact(uint32_t code, const Parcel& data, Parcel* reply,
70                                uint32_t flags = 0);
71};
72
73void registerMediaExtractor(
74        const sp<IMediaExtractor> &extractor,
75        const sp<DataSource> &source,
76        const char *mime);
77
78void registerMediaSource(
79        const sp<IMediaExtractor> &extractor,
80        const sp<IMediaSource> &source);
81
82status_t dumpExtractors(int fd, const Vector<String16>& args);
83
84
85}  // namespace android
86
87#endif  // IMEDIA_EXTRACTOR_BASE_H_
88