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      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 <media/stagefright/MediaSource.h>
     22 #include <utils/Errors.h>
     23 #include <utils/KeyedVector.h>
     24 #include <utils/RefBase.h>
     25 #include <utils/String8.h>
     26 #include <utils/threads.h>
     27 #include <utils/Vector.h>
     28 
     29 namespace android {
     30 
     31 struct ABuffer;
     32 struct AMessage;
     33 struct DataSource;
     34 struct IMediaHTTPService;
     35 struct MediaBuffer;
     36 struct MediaExtractor;
     37 struct MediaSource;
     38 struct MetaData;
     39 
     40 struct NuMediaExtractor : public RefBase {
     41     enum SampleFlags {
     42         SAMPLE_FLAG_SYNC        = 1,
     43         SAMPLE_FLAG_ENCRYPTED   = 2,
     44     };
     45 
     46     NuMediaExtractor();
     47 
     48     status_t setDataSource(
     49             const sp<IMediaHTTPService> &httpService,
     50             const char *path,
     51             const KeyedVector<String8, String8> *headers = NULL);
     52 
     53     status_t setDataSource(int fd, off64_t offset, off64_t size);
     54 
     55     status_t setDataSource(const sp<DataSource> &datasource);
     56 
     57     size_t countTracks() const;
     58     status_t getTrackFormat(size_t index, sp<AMessage> *format) const;
     59 
     60     status_t getFileFormat(sp<AMessage> *format) const;
     61 
     62     status_t selectTrack(size_t index);
     63     status_t unselectTrack(size_t index);
     64 
     65     status_t seekTo(
     66             int64_t timeUs,
     67             MediaSource::ReadOptions::SeekMode mode =
     68                 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC);
     69 
     70     status_t advance();
     71     status_t readSampleData(const sp<ABuffer> &buffer);
     72     status_t getSampleTrackIndex(size_t *trackIndex);
     73     status_t getSampleTime(int64_t *sampleTimeUs);
     74     status_t getSampleMeta(sp<MetaData> *sampleMeta);
     75 
     76     bool getCachedDuration(int64_t *durationUs, bool *eos) const;
     77 
     78 protected:
     79     virtual ~NuMediaExtractor();
     80 
     81 private:
     82     enum TrackFlags {
     83         kIsVorbis       = 1,
     84     };
     85 
     86     struct TrackInfo {
     87         sp<MediaSource> mSource;
     88         size_t mTrackIndex;
     89         status_t mFinalResult;
     90         MediaBuffer *mSample;
     91         int64_t mSampleTimeUs;
     92 
     93         uint32_t mTrackFlags;  // bitmask of "TrackFlags"
     94     };
     95 
     96     mutable Mutex mLock;
     97 
     98     sp<DataSource> mDataSource;
     99 
    100     sp<MediaExtractor> mImpl;
    101     bool mIsWidevineExtractor;
    102 
    103     Vector<TrackInfo> mSelectedTracks;
    104     int64_t mTotalBitrate;  // in bits/sec
    105     int64_t mDurationUs;
    106 
    107     ssize_t fetchTrackSamples(
    108             int64_t seekTimeUs = -1ll,
    109             MediaSource::ReadOptions::SeekMode mode =
    110                 MediaSource::ReadOptions::SEEK_CLOSEST_SYNC);
    111 
    112     void releaseTrackSamples();
    113 
    114     bool getTotalBitrate(int64_t *bitRate) const;
    115     void updateDurationAndBitrate();
    116 
    117     DISALLOW_EVIL_CONSTRUCTORS(NuMediaExtractor);
    118 };
    119 
    120 }  // namespace android
    121 
    122 #endif  // NU_MEDIA_EXTRACTOR_H_
    123 
    124