TagParser::Mpeg4Descriptor Class Reference

The Mpeg4Descriptor class helps to parse MPEG-4 descriptors. More...

#include <mpeg4descriptor.h>

Inheritance diagram for TagParser::Mpeg4Descriptor:

Collaboration diagram for TagParser::Mpeg4Descriptor:

Public Member Functions
	Mpeg4Descriptor (ContainerType &container, std::uint64_t startOffset, std::uint64_t maxSize)
	Constructs a new top level descriptor with the specified container at the specified startOffset and with the specified maxSize.
std::string	idToString () const
	Converts the specified atom ID to a printable string.
bool	isParent () const
	Returns an indication whether the descriptor contains sub descriptors.
bool	isPadding () const
	Returns always false for MPEG-4 descriptors.
std::uint64_t	firstChildOffset () const
	Returns the offset of the first child (relative to the start offset of this descriptor).
Public Member Functions inherited from TagParser::GenericFileElement< Mpeg4Descriptor >
	GenericFileElement (ContainerType &container, std::uint64_t startOffset)
	GenericFileElement (Mpeg4Descriptor &parent, std::uint64_t startOffset)
	Constructs a new sub level file element with the specified parent at the specified startOffset.
	GenericFileElement (ContainerType &container, std::uint64_t startOffset, std::uint64_t maxSize)
	GenericFileElement (const GenericFileElement &other)=delete
	GenericFileElement (GenericFileElement &other)=delete
GenericFileElement &	operator= (const GenericFileElement &other)=delete
ContainerType &	container ()
	Returns the related container.
const ContainerType &	container () const
	Returns the related container.
std::iostream &	stream ()
	Returns the related stream.
CppUtilities::BinaryReader &	reader ()
	Returns the related BinaryReader.
CppUtilities::BinaryWriter &	writer ()
	Returns the related BinaryWriter.
std::uint64_t	startOffset () const
	Returns the start offset in the related stream.
std::uint64_t	relativeStartOffset () const
	Returns the offset of the element in its parent or - if it is a top-level element - in the related stream.
const IdentifierType &	id () const
	Returns the element ID.
std::string	idToString () const
	Returns a printable string representation of the element ID.
std::uint32_t	idLength () const
	Returns the length of the id denotation in byte.
std::uint32_t	headerSize () const
	Returns the header size of the element in byte.
DataSizeType	dataSize () const
	Returns the data size of the element in byte.
std::uint32_t	sizeLength () const
	Returns the length of the size denotation of the element in byte.
std::uint64_t	dataOffset () const
	Returns the data offset of the element in the related stream.
std::uint64_t	totalSize () const
	Returns the total size of the element.
std::uint64_t	endOffset () const
	Returns the offset of the first byte which doesn't belong to this element anymore.
std::uint64_t	maxTotalSize () const
	Returns maximum total size.
std::uint8_t	level () const
	Returns how deep the element is nested (0 for top-level elements, 1 for children of top-level elements, ...).
Mpeg4Descriptor *	parent ()
	Returns the parent of the element.
const Mpeg4Descriptor *	parent () const
	Returns the parent of the element.
Mpeg4Descriptor *	parent (std::uint8_t n)
	Returns the n-th parent of the element.
const Mpeg4Descriptor *	parent (std::uint8_t n) const
	Returns the n-th parent of the element.
Mpeg4Descriptor *	nextSibling ()
	Returns the next sibling of the element.
const Mpeg4Descriptor *	nextSibling () const
	Returns the next sibling of the element.
Mpeg4Descriptor *	firstChild ()
	Returns the first child of the element.
const Mpeg4Descriptor *	firstChild () const
	Returns the first child of the element.
Mpeg4Descriptor *	lastChild ()
	Returns the last child of the element.
const Mpeg4Descriptor *	lastChild () const
	Returns the last child of the element.
Mpeg4Descriptor *	subelementByPath (Diagnostics &diag, IdentifierType item)
	Returns the sub element for the specified path.
Mpeg4Descriptor *	subelementByPath (Diagnostics &diag, IdentifierType item, IdentifierType remainingPath...)
	Returns the sub element for the specified path.
const Mpeg4Descriptor *	subelementByPath (Diagnostics &diag, IdentifierType item) const
	Returns the sub element for the specified path.
const Mpeg4Descriptor *	subelementByPath (Diagnostics &diag, IdentifierType item, IdentifierType remainingPath...) const
	Returns the sub element for the specified path.
Mpeg4Descriptor *	childById (const IdentifierType &id, Diagnostics &diag)
	Returns the first child with the specified id.
const Mpeg4Descriptor *	childById (const IdentifierType &id, Diagnostics &diag) const
	Returns the first child with the specified id.
Mpeg4Descriptor *	siblingById (const IdentifierType &id, Diagnostics &diag)
	Returns the first sibling with the specified id.
const Mpeg4Descriptor *	siblingById (const IdentifierType &id, Diagnostics &diag) const
	Returns the first sibling with the specified id.
Mpeg4Descriptor *	siblingByIdIncludingThis (const IdentifierType &id, Diagnostics &diag)
	Returns the first sibling with the specified id or the current instance if its ID equals id.
const Mpeg4Descriptor *	siblingByIdIncludingThis (const IdentifierType &id, Diagnostics &diag) const
	Returns the first sibling with the specified id or the current instance if its ID equals id.
bool	isParent () const
	Returns an indication whether this instance is a parent element.
bool	isPadding () const
	Returns an indication whether this instance is a padding element.
std::uint64_t	firstChildOffset () const
	Returns the offset of the first child (relative to the start offset of this element).
bool	isParsed () const
	Returns an indication whether this instance has been parsed yet.
void	clear ()
	Clears the status of the element.
void	parse (Diagnostics &diag)
	Parses the header information of the element which is read from the related stream at the start offset.
void	reparse (Diagnostics &diag)
	Parses the header information of the element which is read from the related stream at the start offset.
void	validateSubsequentElementStructure (Diagnostics &diag, std::uint64_t *paddingSize=nullptr, AbortableProgressFeedback *progress=nullptr)
	Parses (see parse()) this and all subsequent elements.
void	copyHeader (TargetStream &targetStream, Diagnostics &diag, AbortableProgressFeedback *progress)
	Writes the header information of the element to the specified targetStream.
void	copyWithoutChilds (TargetStream &targetStream, Diagnostics &diag, AbortableProgressFeedback *progress)
	Writes the element without its children to the specified targetStream.
void	copyEntirely (TargetStream &targetStream, Diagnostics &diag, AbortableProgressFeedback *progress)
	Writes the entire element including all children to the specified targetStream.
void	makeBuffer ()
	Buffers the element (header and data).
void	discardBuffer ()
	Discards buffered data.
void	copyBuffer (TargetStream &targetStream)
	Copies buffered data to targetStream.
void	copyPreferablyFromBuffer (TargetStream &targetStream, Diagnostics &diag, AbortableProgressFeedback *progress)
	Copies buffered data to targetStream if data has been buffered; copies from input stream otherwise.
const std::unique_ptr< char[]> &	buffer ()
	Returns buffered data.
Mpeg4Descriptor *	denoteFirstChild (std::uint32_t offset)
	Denotes the first child to start at the specified offset (relative to the start offset of this descriptor).

Protected Member Functions
	Mpeg4Descriptor (Mpeg4Descriptor &parent, std::uint64_t startOffset)
	Constructs a new sub level descriptor with the specified parent at the specified startOffset.
void	internalParse (Diagnostics &diag)
	Parses the MPEG-4 descriptor.

Friends
class	GenericFileElement< Mpeg4Descriptor >

Additional Inherited Members
Public Types inherited from TagParser::GenericFileElement< Mpeg4Descriptor >
using	ContainerType = typename FileElementTraits< Mpeg4Descriptor >::ContainerType
	Specifies the type of the corresponding container.
using	IdentifierType = typename FileElementTraits< Mpeg4Descriptor >::IdentifierType
	Specifies the type used to store identifiers.
using	DataSizeType = typename FileElementTraits< Mpeg4Descriptor >::DataSizeType
	Specifies the type used to store data sizes.
Static Public Member Functions inherited from TagParser::GenericFileElement< Mpeg4Descriptor >
static constexpr std::uint32_t	maximumIdLengthSupported ()
	Returns the maximum id length supported by the class in byte.
static constexpr std::uint32_t	maximumSizeLengthSupported ()
	Returns the maximum size length supported by the class in byte.
static constexpr std::uint8_t	minimumElementSize ()
	Returns the minimum element size.
Protected Attributes inherited from TagParser::GenericFileElement< Mpeg4Descriptor >
IdentifierType	m_id
std::uint64_t	m_startOffset
std::uint64_t	m_maxSize
DataSizeType	m_dataSize
std::uint32_t	m_idLength
std::uint32_t	m_sizeLength
Mpeg4Descriptor *	m_parent
std::unique_ptr< Mpeg4Descriptor >	m_nextSibling
std::unique_ptr< Mpeg4Descriptor >	m_firstChild
std::unique_ptr< char[]>	m_buffer
bool	m_sizeUnknown

Detailed Description

The Mpeg4Descriptor class helps to parse MPEG-4 descriptors.

Definition at line 31 of file mpeg4descriptor.h.

Constructor & Destructor Documentation

Mpeg4Descriptor() [1/2]

TagParser::Mpeg4Descriptor::Mpeg4Descriptor	(	ContainerType &	container,
		std::uint64_t	startOffset,
		std::uint64_t	maxSize
	)

Constructs a new top level descriptor with the specified container at the specified startOffset and with the specified maxSize.

Definition at line 23 of file mpeg4descriptor.cpp.

Mpeg4Descriptor() [2/2]

TagParser::Mpeg4Descriptor::Mpeg4Descriptor ( Mpeg4Descriptor &  parent, std::uint64_t  startOffset  )

protected

Constructs a new sub level descriptor with the specified parent at the specified startOffset.

Definition at line 31 of file mpeg4descriptor.cpp.

Member Function Documentation

firstChildOffset()

std::uint64_t TagParser::Mpeg4Descriptor::firstChildOffset ( ) const

inline

Returns the offset of the first child (relative to the start offset of this descriptor).

Remarks

The first child must be denoted (via denoteFirstChild()).

Definition at line 74 of file mpeg4descriptor.h.

idToString()

std::string TagParser::Mpeg4Descriptor::idToString

(

)

const

Converts the specified atom ID to a printable string.

Definition at line 47 of file mpeg4descriptor.cpp.

internalParse()

void TagParser::Mpeg4Descriptor::internalParse ( Diagnostics &  diag )

protected

Parses the MPEG-4 descriptor.

Remarks

Does not detect the first child.

Definition at line 56 of file mpeg4descriptor.cpp.

isPadding()

bool TagParser::Mpeg4Descriptor::isPadding ( ) const

inline

Returns always false for MPEG-4 descriptors.

Definition at line 64 of file mpeg4descriptor.h.

isParent()

bool TagParser::Mpeg4Descriptor::isParent ( ) const

inline

Returns an indication whether the descriptor contains sub descriptors.

Remarks

Returns true if a first child has been denoted (via denoteFirstChild()).

Definition at line 56 of file mpeg4descriptor.h.

Friends And Related Symbol Documentation

GenericFileElement< Mpeg4Descriptor >

friend class GenericFileElement< Mpeg4Descriptor >

friend

Definition at line 25 of file mpeg4descriptor.h.

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The documentation for this class was generated from the following files:

• mp4/mpeg4descriptor.h
• mp4/mpeg4descriptor.cpp