MPEG2PSExtractor.h revision a48a51c056198a778755cbed52884dc30b74ac0a 
1/*
2 * Copyright (C) 2011 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 MPEG2_PS_EXTRACTOR_H_
18
19#define MPEG2_PS_EXTRACTOR_H_
20
21#include <media/stagefright/foundation/ABase.h>
22#include <media/stagefright/MediaExtractor.h>
23#include <utils/threads.h>
24#include <utils/KeyedVector.h>
25
26namespace android {
27
28struct ABuffer;
29struct AMessage;
30struct Track;
31class String8;
32
33struct MPEG2PSExtractor : public MediaExtractor {
34    MPEG2PSExtractor(const sp<DataSource> &source);
35
36    virtual size_t countTracks();
37    virtual sp<IMediaSource> getTrack(size_t index);
38    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
39
40    virtual sp<MetaData> getMetaData();
41
42    virtual uint32_t flags() const;
43    virtual const char * name() { return "MPEG2PSExtractor"; }
44
45protected:
46    virtual ~MPEG2PSExtractor();
47
48private:
49    struct Track;
50    struct WrappedTrack;
51
52    mutable Mutex mLock;
53    sp<DataSource> mDataSource;
54
55    off64_t mOffset;
56    status_t mFinalResult;
57    sp<ABuffer> mBuffer;
58    KeyedVector<unsigned, sp<Track> > mTracks;
59    bool mScanning;
60
61    bool mProgramStreamMapValid;
62    KeyedVector<unsigned, unsigned> mStreamTypeByESID;
63
64    status_t feedMore();
65
66    status_t dequeueChunk();
67    ssize_t dequeuePack();
68    ssize_t dequeueSystemHeader();
69    ssize_t dequeuePES();
70
71    DISALLOW_EVIL_CONSTRUCTORS(MPEG2PSExtractor);
72};
73
74bool SniffMPEG2PS(
75        const sp<DataSource> &source, String8 *mimeType, float *confidence,
76        sp<AMessage> *);
77
78}  // namespace android
79
80#endif  // MPEG2_PS_EXTRACTOR_H_
81
82