115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
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#ifndef MP4TRACK_H
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#define MP4TRACK_H
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#include "../avc/avcconfiguration.h"
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#include "../abstracttrack.h"
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#include <vector>
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namespace Media
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{
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class Mp4Atom;
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class LIB_EXPORT Mp4Track : public AbstractTrack
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{
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public:
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Mp4Track(Mp4Atom &trakAtom);
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~Mp4Track();
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TrackType type() const;
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Mp4Atom &trakAtom();
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const std::vector<uint32> &sampleSizes() const;
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unsigned int chunkOffsetSize() const;
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uint32 chunkCount() const;
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uint32 sampleToChunkEntryCount() const;
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std::vector<uint64> readChunkOffsets();
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std::vector<std::tuple<uint32, uint32, uint32> > readSampleToChunkTable();
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std::vector<uint64> readChunkSizes();
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AvcConfiguration readAvcConfiguration();
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void updateChunkOffsets(const std::vector<int64> &oldMdatOffsets, const std::vector<int64> &newMdatOffsets);
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void updateChunkOffset(uint32 chunkIndex, uint64 offset);
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void makeTrack();
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void makeTrackHeader();
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void makeMedia();
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void makeMediaInfo();
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void makeSampleTable();
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protected:
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void internalParseHeader();
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private:
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uint64 accumulateSampleSizes(size_t &sampleIndex, size_t count);
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void addChunkSizeEntries(std::vector<uint64> &chunkSizeTable, size_t count, size_t &sampleIndex, uint32 sampleCount);
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Mp4Atom *m_trakAtom;
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Mp4Atom *m_tkhdAtom;
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Mp4Atom *m_mdiaAtom;
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Mp4Atom *m_mdhdAtom;
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Mp4Atom *m_hdlrAtom;
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Mp4Atom *m_minfAtom;
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Mp4Atom *m_stblAtom;
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Mp4Atom *m_stsdAtom;
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Mp4Atom *m_stscAtom;
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Mp4Atom *m_stcoAtom;
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Mp4Atom *m_stszAtom;
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Mp4Atom *m_codecConfigAtom;
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uint16 m_framesPerSample;
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std::vector<uint32> m_sampleSizes;
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unsigned int m_chunkOffsetSize;
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uint32 m_chunkCount;
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uint32 m_sampleToChunkEntryCount;
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};
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/*!
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* \brief Returns the trak atom for the current instance.
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*/
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inline Mp4Atom &Mp4Track::trakAtom()
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{
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return *m_trakAtom;
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}
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/*!
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* \brief Returns the sample size table for the track.
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* \remarks If the table contains only one size this is the constant
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* sample size.
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* \remarks The table is empty if the track denotes 64-bit sample sizes.
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* \sa sampleSizes64()
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*/
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inline const std::vector<uint32> &Mp4Track::sampleSizes() const
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{
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return m_sampleSizes;
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}
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/*!
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* \brief Returns the size of a single chunk offset denotation within the stco atom.
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*
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* Valid values are 4 and 8 bytes.
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*/
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inline unsigned int Mp4Track::chunkOffsetSize() const
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{
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return m_chunkOffsetSize;
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}
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/*!
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* \brief Returns the number of chunks denoted by the stco atom.
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*/
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inline uint32 Mp4Track::chunkCount() const
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{
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return m_chunkCount;
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}
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/*!
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* \brief Returns the number of "sample to chunk" entries within the stsc atom.
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*/
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inline uint32 Mp4Track::sampleToChunkEntryCount() const
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{
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return m_sampleToChunkEntryCount;
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}
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}
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#endif // MP4TRACK_H
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