Implementation of TagParser::Tag for the Matroska container. More...

#include <matroskatag.h>

Inheritance diagram for TagParser::MatroskaTag:

Collaboration diagram for TagParser::MatroskaTag:

Public Member Functions
	MatroskaTag ()
	Constructs a new tag.

bool	canEncodingBeUsed (TagTextEncoding encoding) const override
	Returns an indication whether the specified encoding can be used to provide string values for the tag.

bool	supportsTarget () const override
	Returns an indication whether a target is supported by the tag.

bool	supportsMultipleValues (KnownField field) const override
	Allows multiple values for all fields.

TagTargetLevel	targetLevel () const override
	Returns the name of the current tag target level.

void	parse (EbmlElement &tagElement, Diagnostics &diag)
	Parses tag information from the specified tagElement.

void	parse2 (EbmlElement &tagElement, MatroskaTagFlags flags, Diagnostics &diag)
	Parses tag information from the specified tagElement.

MatroskaTagMaker	prepareMaking (Diagnostics &diag)
	Prepares making.

void	make (std::ostream &stream, Diagnostics &diag)
	Writes tag information to the specified stream (makes a "Tag"-element).

Public Member Functions inherited from TagParser::FieldMapBasedTag< MatroskaTag >
	FieldMapBasedTag ()
	Constructs a new FieldMapBasedTag.

TagType	type () const
	Returns the type of the tag as TagParser::TagType.

std::string_view	typeName () const
	Returns the type name of the tag as C-style string.

TagTextEncoding	proposedTextEncoding () const
	Returns the proposed text encoding.

const TagValue &	value (const IdentifierType &id) const
	Returns the value of the field with the specified id.

const TagValue &	value (KnownField field) const
	Returns the value of the specified field.

std::vector< const TagValue * >	values (const IdentifierType &id) const
	Returns the values of the field with the specified id.

std::vector< const TagValue * >	values (KnownField field) const
	Returns the values of the specified field.

bool	setValue (const IdentifierType &id, const TagValue &value)
	Assigns the given value to the field with the specified id.

bool	setValue (KnownField field, const TagValue &value)
	Assigns the given value to the specified field.

bool	setValues (const IdentifierType &id, const std::vector< TagValue > &values)
	Assigns the given values to the field with the specified id.

bool	setValues (KnownField field, const std::vector< TagValue > &values)
	Assigns the given values to the field with the specified id.

bool	hasField (KnownField field) const
	Returns an indication whether the specified field is present.

bool	hasField (const IdentifierType &id) const
	Returns an indication whether the field with the specified id is present.

void	removeAllFields ()
	Removes all fields from the tag.

const std::multimap< IdentifierType, FieldType, Compare > &	fields () const
	Returns the fields of the tag by providing direct access to the field map of the tag.

std::multimap< IdentifierType, FieldType, Compare > &	fields ()
	Returns the fields of the tag by providing direct access to the field map of the tag.

std::size_t	fieldCount () const
	Returns the number of present fields.

IdentifierType	fieldId (KnownField value) const
	Returns the ID for the specified field.

KnownField	knownField (const IdentifierType &id) const
	Returns the field for the specified ID.

bool	supportsField (KnownField field) const
	Returns an indication whether the specified field is supported by the tag.

TagDataType	proposedDataType (const IdentifierType &id) const
	Returns the proposed data type for the field with the specified id.

virtual TagDataType	proposedDataType (KnownField field) const
	Returns the proposed data type for the specified field as TagDataType.

std::size_t	insertFields (const FieldMapBasedTag< MatroskaTag > &from, bool overwrite)
	Inserts all fields from another tag of the same field type and compare function.

std::size_t	insertValues (const Tag &from, bool overwrite)
	Inserts all compatible values from another Tag.

void	ensureTextValuesAreProperlyEncoded ()
	Ensures the encoding of all assigned text values is supported by the tag by converting the character set if necessary.

Public Member Functions inherited from TagParser::Tag
virtual	~Tag ()
	Destroys the Tag.

std::string	toString () const
	Returns a string representation of the tag.

const std::string &	version () const
	Returns the version of the tag as std::string.

std::uint64_t	size () const
	Returns the size the tag within the file it is parsed from in bytes.

const TagTarget &	target () const

TagTarget &	target ()
	Returns the target of tag.

void	setTarget (const TagTarget &target)
	Sets the target of tag.

std::string_view	targetLevelName () const
	Returns the name of the current target level.

bool	isTargetingLevel (TagTargetLevel tagTargetLevel) const
	Returns whether the tag is targeting the specified tagTargetLevel.

std::string	targetString () const
	Returns the string representation for the assigned tag target.

virtual bool	supportsDescription (KnownField field) const
	Returns an indications whether the specified field supports descriptions.

virtual bool	supportsMimeType (KnownField field) const
	Returns an indications whether the specified field supports mime types.

Static Public Attributes
static constexpr TagType	tagType = TagType::MatroskaTag

static constexpr std::string_view	tagName = "Matroska tag"

static constexpr TagTextEncoding	defaultTextEncoding = TagTextEncoding::Utf8

Protected Member Functions
IdentifierType	internallyGetFieldId (KnownField field) const

KnownField	internallyGetKnownField (const IdentifierType &id) const

Protected Member Functions inherited from TagParser::FieldMapBasedTag< MatroskaTag >
const TagValue &	internallyGetValue (const IdentifierType &id) const
	Default implementation for value().

void	internallyGetValuesFromField (const FieldType &field, std::vector< const TagValue * > &values) const
	Default way to gather values from a field in internallyGetValues().

std::vector< const TagValue * >	internallyGetValues (const IdentifierType &id) const
	Default implementation for values().

bool	internallySetValue (const IdentifierType &id, const TagValue &value)
	Default implementation for setValue().

bool	internallySetValues (const IdentifierType &id, const std::vector< TagValue > &values)
	Default implementation for setValues().

bool	internallyHasField (const IdentifierType &id) const
	Default implementation for hasField().

TagDataType	internallyGetProposedDataType (const IdentifierType &id) const
	Default implementation for proposedDataType().

Protected Member Functions inherited from TagParser::Tag
	Tag ()
	Constructs a new Tag.

Friends
class	FieldMapBasedTag< MatroskaTag >

Additional Inherited Members
Public Types inherited from TagParser::FieldMapBasedTag< MatroskaTag >
using	FieldType = typename FieldMapBasedTagTraits< MatroskaTag >::FieldType

using	IdentifierType = typename FieldMapBasedTagTraits< MatroskaTag >::FieldType::IdentifierType

using	Compare = typename FieldMapBasedTagTraits< MatroskaTag >::Compare

Protected Types inherited from TagParser::FieldMapBasedTag< MatroskaTag >
using	CRTPBase = FieldMapBasedTag< MatroskaTag >

Protected Attributes inherited from TagParser::Tag
std::string	m_version

std::uint64_t	m_size

std::unique_ptr< TagPrivate >	m_p

TagTarget	m_target

Detailed Description

Implementation of TagParser::Tag for the Matroska container.

Definition at line 72 of file matroskatag.h.

Constructor & Destructor Documentation

◆ MatroskaTag()

TagParser::MatroskaTag::MatroskaTag ( )

inline

Constructs a new tag.

Definition at line 102 of file matroskatag.h.

Member Function Documentation

◆ canEncodingBeUsed()

bool TagParser::MatroskaTag::canEncodingBeUsed ( TagTextEncoding encoding ) const

inlineoverridevirtual

Returns an indication whether the specified encoding can be used to provide string values for the tag.

Only the proposedTextEncoding() is accepted by default. This might be overwritten when subclassing.

The tag class and its subclasses do not perform any conversions. You have to provide all string values using an encoding which is appropriate for the specific tag type. This method is meant to determine if a particular encoding can be used.

See also: canEncodingBeUsed()

Reimplemented from TagParser::Tag.

Definition at line 153 of file matroskatag.h.

◆ internallyGetFieldId()

MatroskaTag::IdentifierType TagParser::MatroskaTag::internallyGetFieldId ( KnownField field ) const

protected

Definition at line 20 of file matroskatag.cpp.

◆ internallyGetKnownField()

KnownField TagParser::MatroskaTag::internallyGetKnownField ( const IdentifierType & id ) const

protected

Definition at line 211 of file matroskatag.cpp.

◆ make()

void TagParser::MatroskaTag::make	(	std::ostream &	stream,
		Diagnostics &	diag
	)

inline

Writes tag information to the specified stream (makes a "Tag"-element).

Exceptions

Throws	std::ios_base::failure when an IO error occurs.
Throws	TagParser::Failure or a derived exception when a making error occurs.

See also: prepareMaking()

Definition at line 148 of file matroskatag.h.

◆ parse()

void TagParser::MatroskaTag::parse	(	EbmlElement &	tagElement,
		Diagnostics &	diag
	)

Parses tag information from the specified tagElement.

Exceptions

Throws	std::ios_base::failure when an IO error occurs.
Throws	TagParser::Failure or a derived exception when a parsing error occurs.

Definition at line 317 of file matroskatag.cpp.

◆ parse2()

void TagParser::MatroskaTag::parse2	(	EbmlElement &	tagElement,
		MatroskaTagFlags	flags,
		Diagnostics &	diag
	)

Parses tag information from the specified tagElement.

Exceptions

Throws	std::ios_base::failure when an IO error occurs.
Throws	TagParser::Failure or a derived exception when a parsing error occurs.

Definition at line 329 of file matroskatag.cpp.

◆ prepareMaking()

MatroskaTagMaker TagParser::MatroskaTag::prepareMaking ( Diagnostics & diag )

inline

Prepares making.

Returns: Returns a MatroskaTagMaker object which can be used to actually make the tag.

Remarks: The tag must NOT be mutated after making is prepared when it is intended to actually make the tag using the make() method of the returned object.

Exceptions

Throws TagParser::Failure or a derived exception when a making error occurs.

This method might be useful when it is necessary to know the size of the tag before making it.

See also: make()

Definition at line 136 of file matroskatag.h.

◆ supportsMultipleValues()

bool TagParser::MatroskaTag::supportsMultipleValues ( KnownField field ) const

inlineoverridevirtual

Allows multiple values for all fields.

Remarks: "Multiple items should never be stored as a list in a single TagString. If there is more than one tag of a certain type to be stored, then more than one SimpleTag should be used."

Reimplemented from TagParser::Tag.

Definition at line 116 of file matroskatag.h.

◆ supportsTarget()

bool TagParser::MatroskaTag::supportsTarget ( ) const

inlineoverridevirtual

Returns an indication whether a target is supported by the tag.

If no target is supported, setting a target using setTarget() has no effect when saving the tag.

Most tag types don't support this feature so the default implementation returns always false. This might be overwritten when subclassing.

Reimplemented from TagParser::Tag.

Definition at line 106 of file matroskatag.h.

◆ targetLevel()

TagTargetLevel TagParser::MatroskaTag::targetLevel ( ) const

inlineoverridevirtual

Returns the name of the current tag target level.

Remarks: Returns TagTargetLevel::Unspecified if target levels are not supported by the tag.

Reimplemented from TagParser::Tag.

Definition at line 121 of file matroskatag.h.

Friends And Related Symbol Documentation

◆ FieldMapBasedTag< MatroskaTag >

friend class FieldMapBasedTag< MatroskaTag >

friend

Definition at line 44 of file matroskatag.h.

Member Data Documentation

◆ defaultTextEncoding

constexpr TagTextEncoding TagParser::MatroskaTag::defaultTextEncoding = TagTextEncoding::Utf8

staticconstexpr

Definition at line 80 of file matroskatag.h.

◆ tagName

constexpr std::string_view TagParser::MatroskaTag::tagName = "Matroska tag"

staticconstexpr

Definition at line 79 of file matroskatag.h.

◆ tagType

constexpr TagType TagParser::MatroskaTag::tagType = TagType::MatroskaTag

staticconstexpr

Definition at line 78 of file matroskatag.h.

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

matroska/matroskatag.h
matroska/matroskatag.cpp

Public Member Functions

Static Public Attributes

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MatroskaTag()

Member Function Documentation

◆ canEncodingBeUsed()

◆ internallyGetFieldId()

◆ internallyGetKnownField()

◆ make()

◆ parse()

◆ parse2()

◆ prepareMaking()

◆ supportsMultipleValues()

◆ supportsTarget()

◆ targetLevel()

Friends And Related Symbol Documentation

◆ FieldMapBasedTag< MatroskaTag >

Member Data Documentation

◆ defaultTextEncoding

◆ tagName

◆ tagType