NuMediaExtractor.h revision 5778822d86b0337407514b9372562b86edfa91cd 
1/*
2 * Copyright 2012, 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 NU_MEDIA_EXTRACTOR_H_
18#define NU_MEDIA_EXTRACTOR_H_
19
20#include <media/stagefright/foundation/ABase.h>
21#include <utils/Errors.h>
22#include <utils/RefBase.h>
23#include <utils/Vector.h>
24
25namespace android {
26
27struct ABuffer;
28struct AMessage;
29struct MediaBuffer;
30struct MediaExtractor;
31struct MediaSource;
32
33struct NuMediaExtractor : public RefBase {
34    NuMediaExtractor();
35
36    status_t setDataSource(const char *path);
37
38    size_t countTracks() const;
39    status_t getTrackFormat(size_t index, sp<AMessage> *format) const;
40
41    status_t selectTrack(size_t index);
42
43    status_t seekTo(int64_t timeUs);
44
45    status_t advance();
46    status_t readSampleData(const sp<ABuffer> &buffer);
47    status_t getSampleTrackIndex(size_t *trackIndex);
48    status_t getSampleTime(int64_t *sampleTimeUs);
49
50protected:
51    virtual ~NuMediaExtractor();
52
53private:
54    enum TrackFlags {
55        kIsVorbis       = 1,
56    };
57
58    struct TrackInfo {
59        sp<MediaSource> mSource;
60        size_t mTrackIndex;
61        status_t mFinalResult;
62        MediaBuffer *mSample;
63        int64_t mSampleTimeUs;
64        uint32_t mFlags;  // bitmask of "TrackFlags"
65    };
66
67    sp<MediaExtractor> mImpl;
68
69    Vector<TrackInfo> mSelectedTracks;
70
71    ssize_t fetchTrackSamples(int64_t seekTimeUs = -1ll);
72    void releaseTrackSamples();
73
74    DISALLOW_EVIL_CONSTRUCTORS(NuMediaExtractor);
75};
76
77}  // namespace android
78
79#endif  // NU_MEDIA_EXTRACTOR_H_
80
81