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/DataSource.h>
22#include <media/IMediaSource.h>
23#include <vector>
24
25namespace android {
26
27class MetaData;
28typedef std::vector<uint8_t> HInterfaceToken;
29
30class IMediaExtractor : public IInterface {
31public:
32    DECLARE_META_INTERFACE(MediaExtractor);
33
34    virtual size_t countTracks() = 0;
35    // This function could return NULL IMediaSource even when index is within the
36    // track count returned by countTracks, since it's possible the track is malformed
37    // and it's not detected during countTracks call.
38    virtual sp<IMediaSource> getTrack(size_t index) = 0;
39
40    enum GetTrackMetaDataFlags {
41        kIncludeExtensiveMetaData = 1
42    };
43    virtual sp<MetaData> getTrackMetaData(
44            size_t index, uint32_t flags = 0) = 0;
45
46    // Return container specific meta-data. The default implementation
47    // returns an empty metadata object.
48    virtual sp<MetaData> getMetaData() = 0;
49
50    virtual status_t getMetrics(Parcel *reply) = 0;
51
52    enum Flags {
53        CAN_SEEK_BACKWARD  = 1,  // the "seek 10secs back button"
54        CAN_SEEK_FORWARD   = 2,  // the "seek 10secs forward button"
55        CAN_PAUSE          = 4,
56        CAN_SEEK           = 8,  // the "seek bar"
57    };
58
59    // If subclasses do _not_ override this, the default is
60    // CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK | CAN_PAUSE
61    virtual uint32_t flags() const = 0;
62
63    virtual status_t setMediaCas(const HInterfaceToken &casToken) = 0;
64
65    virtual const char * name() = 0;
66};
67
68
69class BnMediaExtractor: public BnInterface<IMediaExtractor>
70{
71public:
72    virtual status_t    onTransact(uint32_t code, const Parcel& data, Parcel* reply,
73                                uint32_t flags = 0);
74};
75
76void registerMediaExtractor(
77        const sp<IMediaExtractor> &extractor,
78        const sp<DataSource> &source,
79        const char *mime);
80
81void registerMediaSource(
82        const sp<IMediaExtractor> &extractor,
83        const sp<IMediaSource> &source);
84
85status_t dumpExtractors(int fd, const Vector<String16>& args);
86
87
88}  // namespace android
89
90#endif  // IMEDIA_EXTRACTOR_BASE_H_
91