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114 lines
3.8 KiB
114 lines
3.8 KiB
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MPEG2_TS_EXTRACTOR_H_
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#define MPEG2_TS_EXTRACTOR_H_
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#include <media/stagefright/foundation/ABase.h>
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#include <media/MediaExtractorPluginApi.h>
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#include <media/MediaExtractorPluginHelper.h>
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#include <media/stagefright/MetaDataBase.h>
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#include <utils/threads.h>
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#include <utils/KeyedVector.h>
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#include <utils/Vector.h>
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#include <ATSParser.h>
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namespace android {
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struct AMessage;
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struct AnotherPacketSource;
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struct ATSParser;
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struct CDataSource;
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struct MPEG2TSSource;
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class String8;
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struct MPEG2TSExtractor : public MediaExtractorPluginHelper {
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explicit MPEG2TSExtractor(DataSourceHelper *source);
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virtual size_t countTracks();
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virtual MediaTrackHelper *getTrack(size_t index);
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virtual media_status_t getTrackMetaData(AMediaFormat *meta, size_t index, uint32_t flags);
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virtual media_status_t getMetaData(AMediaFormat *meta);
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virtual media_status_t setMediaCas(const uint8_t* /*casToken*/, size_t /*size*/) override;
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virtual uint32_t flags() const;
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virtual const char * name() { return "MPEG2TSExtractor"; }
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protected:
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virtual ~MPEG2TSExtractor();
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private:
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friend struct MPEG2TSSource;
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mutable Mutex mLock;
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DataSourceHelper *mDataSource;
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sp<ATSParser> mParser;
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// Used to remember SyncEvent occurred in feedMore() when called from init(),
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// because init() needs to update |mSourceImpls| before adding SyncPoint.
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ATSParser::SyncEvent mLastSyncEvent;
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Vector<sp<AnotherPacketSource> > mSourceImpls;
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Vector<KeyedVector<int64_t, off64_t> > mSyncPoints;
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// Sync points used for seeking --- normally one for video track is used.
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// If no video track is present, audio track will be used instead.
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KeyedVector<int64_t, off64_t> *mSeekSyncPoints;
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off64_t mOffset;
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static bool isScrambledFormat(MetaDataBase &format);
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void init();
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void addSource(const sp<AnotherPacketSource> &impl);
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// Try to feed more data from source to parser.
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// |isInit| means this function is called inside init(). This is a signal to
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// save SyncEvent so that init() can add SyncPoint after it updates |mSourceImpls|.
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// This function returns OK if expected amount of data is fed from DataSourceHelper to
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// parser and is successfully parsed. Otherwise, various error codes could be
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// returned, e.g., ERROR_END_OF_STREAM, or no data availalbe from DataSourceHelper, or
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// the data has syntax error during parsing, etc.
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status_t feedMore(bool isInit = false);
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status_t seek(int64_t seekTimeUs,
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const MediaTrackHelper::ReadOptions::SeekMode& seekMode);
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status_t queueDiscontinuityForSeek(int64_t actualSeekTimeUs);
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status_t seekBeyond(int64_t seekTimeUs);
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status_t feedUntilBufferAvailable(const sp<AnotherPacketSource> &impl);
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status_t findIndexOfSource(const sp<AnotherPacketSource> &impl, size_t *index);
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// Add a SynPoint derived from |event|.
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void addSyncPoint_l(const ATSParser::SyncEvent &event);
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status_t estimateDurationsFromTimesUsAtEnd();
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size_t mHeaderSkip;
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DISALLOW_EVIL_CONSTRUCTORS(MPEG2TSExtractor);
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};
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bool SniffMPEG2TS(DataSourceHelper *source, float *confidence);
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} // namespace android
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#endif // MPEG2_TS_EXTRACTOR_H_
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