104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
#ifndef TAG_PARSER_MATROSKATRACK_H
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#define TAG_PARSER_MATROSKATRACK_H
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#include "../abstracttrack.h"
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namespace TagParser {
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class EbmlElement;
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class MatroskaContainer;
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class MatroskaTrack;
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class MatroskaTag;
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class TAG_PARSER_EXPORT MatroskaTrackHeaderMaker {
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friend class MatroskaTrack;
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public:
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void make(std::ostream &stream) const;
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const MatroskaTrack &track() const;
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uint64 requiredSize() const;
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private:
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MatroskaTrackHeaderMaker(const MatroskaTrack &track, Diagnostics &diag);
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const MatroskaTrack &m_track;
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uint64 m_dataSize;
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uint64 m_requiredSize;
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byte m_sizeDenotationLength;
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};
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/*!
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* \brief Returns the number of bytes which will be written when making the track.
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*/
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inline const MatroskaTrack &MatroskaTrackHeaderMaker::track() const
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{
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return m_track;
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}
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/*!
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* \brief Returns the number of bytes which will be written when calling make().
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*/
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inline uint64 MatroskaTrackHeaderMaker::requiredSize() const
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{
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return m_requiredSize;
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}
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class TAG_PARSER_EXPORT MatroskaTrack : public AbstractTrack {
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friend class MatroskaContainer;
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friend class MatroskaTrackHeaderMaker;
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public:
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MatroskaTrack(EbmlElement &trackElement);
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~MatroskaTrack() override;
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TrackType type() const override;
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static MediaFormat codecIdToMediaFormat(const std::string &codecId);
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void readStatisticsFromTags(const std::vector<std::unique_ptr<MatroskaTag>> &tags, Diagnostics &diag);
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MatroskaTrackHeaderMaker prepareMakingHeader(Diagnostics &diag) const;
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void makeHeader(std::ostream &stream, Diagnostics &diag) const;
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protected:
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void internalParseHeader(Diagnostics &diag) override;
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private:
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template <typename PropertyType, typename ConversionFunction>
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void assignPropertyFromTagValue(const std::unique_ptr<MatroskaTag> &tag, const char *fieldId, PropertyType &integer,
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const ConversionFunction &conversionFunction, Diagnostics &diag);
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EbmlElement *m_trackElement;
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};
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/*!
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* \brief Prepares making header.
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* \returns Returns a MatroskaTrackHeaderMaker object which can be used to actually make the track
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* header.
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* \remarks The track must NOT be mutated after making is prepared when it is intended to actually
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* make the tag using the make() method of the returned object.
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* \throws Throws TagParser::Failure or a derived exception when a making error occurs.
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*
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* This method might be useful when it is necessary to know the size of the track header before making
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* it.
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* \sa make()
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*/
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inline MatroskaTrackHeaderMaker MatroskaTrack::prepareMakingHeader(Diagnostics &diag) const
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{
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return MatroskaTrackHeaderMaker(*this, diag);
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}
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/*!
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* \brief Writes header information to the specified \a stream (makes a "TrackEntry"-element).
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* \throws Throws std::ios_base::failure when an IO error occurs.
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* \throws Throws TagParser::Failure or a derived exception when a making
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* error occurs.
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* \sa prepareMaking()
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*/
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inline void MatroskaTrack::makeHeader(std::ostream &stream, Diagnostics &diag) const
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{
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prepareMakingHeader(diag).make(stream);
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}
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} // namespace TagParser
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#endif // TAG_PARSER_MATROSKATRACK_H
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