Representation of an MPEG4_audio_descriptor. More...

#include <tsMPEG4AudioDescriptor.h>

Inheritance diagram for ts::MPEG4AudioDescriptor:

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Collaboration diagram for ts::MPEG4AudioDescriptor:

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Public Member Functions
	MPEG4AudioDescriptor ()
	Default constructor.

	MPEG4AudioDescriptor (DuckContext &duck, const Descriptor &bin)
	Constructor from a binary descriptor.

virtual void	clear ()
	This method clears the content of the table or descriptor.

template<typename INT > requires std::integral<INT>
UString	dataName (const UChar *section, INT value, NamesFlags flags=NamesFlags::NAME, INT alternate=0, size_t bits=0)
	Get a name from a specified section in the DVB names file for that signalization structure.

virtual Standards	definingStandards () const override
	Get the list of standards which define this object.

bool	deserialize (DuckContext &duck, const Descriptor &bin)
	This method deserializes a binary descriptor.

bool	deserialize (DuckContext &duck, const DescriptorList &dlist, size_t index)
	Deserialize a descriptor from a descriptor list.

virtual DescriptorDuplication	duplicationMode () const
	What to do when a descriptor of the same type is added twice in a descriptor list.

EDID	edid () const
	Get the extended descriptor id.

DID	extendedTag () const
	For MPEG-defined and DVB-defined extension descriptors, get the extended descriptor tag (first byte in payload).

virtual void	fromXML (DuckContext &duck, const xml::Element *element)
	This method converts an XML structure to a table or descriptor in this object.

void	invalidate ()
	Invalidate this object.

bool	isValid () const
	Check if this object is valid.

virtual bool	merge (const AbstractDescriptor &desc)
	Merge the content of a descriptor into this object.

bool	serialize (DuckContext &duck, Descriptor &bin) const
	This method serializes a descriptor.

DID	tag () const
	Get the descriptor tag.

virtual xml::Element *	toXML (DuckContext &duck, xml::Element *parent) const
	This method converts this object to XML.

UString	xmlName () const
	Get the XMl node name representing this table or descriptor.

Static Public Member Functions
template<typename INT > requires std::integral<INT>
static UString	DataName (const UChar xml_name, const UChar section, INT value, NamesFlags flags=NamesFlags::NAME, INT alternate=0, size_t bits=0)
	Get a name from a specified section in the DVB names file.

static void	DisplayDescriptor (ts::TablesDisplay &display, const ts::Descriptor &desc, ts::PSIBuffer &payload, const ts::UString &margin, const ts::DescriptorContext &context)
	Static method to display a descriptor.

Public Attributes
uint8_t	MPEG4_audio_profile_and_level = 0
	MPEG-4 Audio profile.

Static Public Attributes
static const UChar *const	XML_GENERIC_DESCRIPTOR
	XML tag name for generic descriptors.

static const UChar *const	XML_GENERIC_LONG_TABLE
	XML tag name for generic tables with long sections.

static const UChar *const	XML_GENERIC_SHORT_TABLE
	XML tag name for generic short sections.

Protected Member Functions
virtual bool	analyzeXML (DuckContext &, const xml::Element *) override
	Helper method to convert this object from XML.

virtual void	buildXML (DuckContext &, xml::Element *) const override
	Helper method to convert this object to XML.

virtual void	clearContent () override
	Helper method to clear the content of the table or descriptor.

virtual void	deserializePayload (PSIBuffer &) override
	Deserialize the payload of the descriptor.

virtual void	serializePayload (PSIBuffer &) const override
	Serialize the payload of the descriptor.

Detailed Description

Representation of an MPEG4_audio_descriptor.

See also: ISO/IEC 13818-1, ITU-T Rec. H.222.0, 2.6.38.

Constructor & Destructor Documentation

◆ MPEG4AudioDescriptor()

ts::MPEG4AudioDescriptor::MPEG4AudioDescriptor	(	DuckContext &	duck,
		const Descriptor &	bin
	)

Constructor from a binary descriptor.

Parameters

[in,out]	duck	TSDuck execution context.
[in]	bin	A binary descriptor to deserialize.

Member Function Documentation

◆ DisplayDescriptor()

static void ts::MPEG4AudioDescriptor::DisplayDescriptor	(	ts::TablesDisplay &	display,
		const ts::Descriptor &	desc,
		ts::PSIBuffer &	payload,
		const ts::UString &	margin,
		const ts::DescriptorContext &	context
	)

static

Static method to display a descriptor.

Parameters

[in,out]	display	Display engine.
[in]	desc	The descriptor to display.
[in,out]	payload	A PSIBuffer over the payload.
[in]	margin	Left margin content.
[in]	context	Context of the descriptor.

◆ clearContent()

virtual void ts::MPEG4AudioDescriptor::clearContent ( )

overrideprotectedvirtual

Helper method to clear the content of the table or descriptor.

It is called by clear(). In clearContent(), the subclass shall simply revert the value of all fields to their original values in the default constructor.

Implements ts::AbstractSignalization.

◆ serializePayload()

virtual void ts::MPEG4AudioDescriptor::serializePayload ( PSIBuffer & buf ) const

overrideprotectedvirtual

Serialize the payload of the descriptor.

When serialize() is called, the output binary descriptor is cleared and serializePayload() is called. A subclass shall implement serializePayload().

Important: With extension descriptors (MPEG or DVB), serializePayload() does not need to add the extended descriptor tag, it has already been added in the buffer by AbstractDescriptor::serialize().

Parameters

[in,out] buf Serialization buffer. The subclass shall write the descriptor payload into buf. If any kind of error is reported in the buffer, the serialization is considered as invalid and the binary descriptor is invalid. Such errors include write error, such as attempting to write more data than allowed in a binary descriptor or any user-generated error using ts::Buffer::setUserError(). For "extended descriptors", the buffer starts after the "extension tag" which was already written by the caller.

Implements ts::AbstractDescriptor.

◆ deserializePayload()

virtual void ts::MPEG4AudioDescriptor::deserializePayload ( PSIBuffer & buf )

overrideprotectedvirtual

Deserialize the payload of the descriptor.

When deserialize() is called, this object is cleared and validated. Then, deserializePayload() is invoked. A subclass shall implement deserializePayload().

Important: With extension descriptors (MPEG or DVB), deserializePayload() must not read the extended descriptor tag, it has already been extracted from the buffer and verified by AbstractDescriptor::deserialize().

Parameters

[in,out] buf Deserialization buffer. The subclass shall read the descriptor payload from buf. The end of read is the end of the binary payload. If any kind of error is reported in the buffer or if the payload is not completely read, the deserialization is considered as invalid. For "extended descriptors", the buffer starts after the "extension tag".

Implements ts::AbstractDescriptor.

◆ buildXML()

virtual void ts::MPEG4AudioDescriptor::buildXML	(	DuckContext &	duck,
		xml::Element *	root
	)		const

overrideprotectedvirtual

Helper method to convert this object to XML.

It is called by toXML() only when the object is valid. The root element is already built with the appropriate XML node name. In buildXML(), the subclass shall simply populate the XML node.

Parameters

[in,out]	root	The root node for the new XML tree.
[in,out]	duck	TSDuck execution context.

Implements ts::AbstractSignalization.

◆ analyzeXML()

virtual bool ts::MPEG4AudioDescriptor::analyzeXML	(	DuckContext &	duck,
		const xml::Element *	element
	)

overrideprotectedvirtual

Helper method to convert this object from XML.

It is called by fromXML() after checking the validity of the XML node name. In analyzeXML(), the subclass shall populate the C++ object from the content of the XML node. If analyzeXML() returns false, this table or descriptor object is then invalidated and cleared.

Parameters

[in,out]	duck	TSDuck execution context.
[in]	element	XML element to convert.

Returns: True if the analysis is correct, false otherwise.

Implements ts::AbstractSignalization.

◆ tag()

DID ts::AbstractDescriptor::tag ( ) const

inlineinherited

Get the descriptor tag.

Returns: The descriptor tag.

◆ edid()

EDID ts::AbstractDescriptor::edid ( ) const

inlineinherited

Get the extended descriptor id.

Returns: The extended descriptor id.

◆ duplicationMode()

virtual DescriptorDuplication ts::AbstractDescriptor::duplicationMode ( ) const

virtualinherited

What to do when a descriptor of the same type is added twice in a descriptor list.

The default action is DescriptorDuplication::ADD, meaning that descriptors are added to the list. Descriptor subclasses should override this method to define a new action.

Returns: The descriptor duplication mode for this class of descriptors.

Reimplemented in ts::ExtendedChannelNameDescriptor, ts::AbstractDeliverySystemDescriptor, ts::AbstractLogicalChannelDescriptor, ts::AbstractMultilingualDescriptor, ts::BouquetNameDescriptor, ts::CAIdentifierDescriptor, ts::DVBAC3Descriptor, ts::DVBEnhancedAC3Descriptor, ts::LocalTimeOffsetDescriptor, ts::NetworkNameDescriptor, ts::ServiceDescriptor, ts::ServiceIdentifierDescriptor, ts::ServiceListDescriptor, ts::EutelsatChannelNumberDescriptor, ts::BroadcasterNameDescriptor, ts::CADescriptor, and ts::NorDigLogicalChannelDescriptorV1.

◆ merge()

virtual bool ts::AbstractDescriptor::merge ( const AbstractDescriptor & desc )

virtualinherited

Merge the content of a descriptor into this object.

This method implements the duplication mode DescriptorDuplication::MERGE and is specific to each descriptor subclass. By default, the merge fails.

Parameters

[in] desc The other descriptor to merge into this object. Usually, desc has the same subclass as this object, although this is not required. This is up to the implementation of the subclass to decide what to do.

Returns: True if the merge succeeded, false if it failed.

Reimplemented in ts::AbstractLogicalChannelDescriptor, ts::AbstractMultilingualDescriptor, ts::DVBAC3Descriptor, ts::DVBEnhancedAC3Descriptor, ts::LocalTimeOffsetDescriptor, ts::ServiceListDescriptor, ts::EutelsatChannelNumberDescriptor, and ts::NorDigLogicalChannelDescriptorV1.

◆ extendedTag()

DID ts::AbstractDescriptor::extendedTag ( ) const

inlineinherited

For MPEG-defined and DVB-defined extension descriptors, get the extended descriptor tag (first byte in payload).

Returns: The extended descriptor tag or XDID_NULL if this is not an extended descriptor.

◆ serialize()

bool ts::AbstractDescriptor::serialize	(	DuckContext &	duck,
		Descriptor &	bin
	)		const

inherited

This method serializes a descriptor.

Parameters

[in,out]	duck	TSDuck execution context.
[out]	bin	A binary descriptor object. Its content is replaced with a binary representation of this descriptor.

Returns: True in case of success, false if the descriptor is invalid.

◆ deserialize() [1/2]

bool ts::AbstractDescriptor::deserialize	(	DuckContext &	duck,
		const Descriptor &	bin
	)

inherited

This method deserializes a binary descriptor.

Parameters

[in,out]	duck	TSDuck execution context.
[in]	bin	A binary descriptor to interpret according to the descriptor subclass. In case of success, this object is replaced with the interpreted content of bin. In case of error, this object is invalidated.

Returns: True in case of success, false if the descriptor is invalid.

◆ deserialize() [2/2]

bool ts::AbstractDescriptor::deserialize	(	DuckContext &	duck,
		const DescriptorList &	dlist,
		size_t	index
	)

inherited

Deserialize a descriptor from a descriptor list.

In case of success, this object is replaced with the interpreted content of the binary descriptor. In case of error, this object is invalidated.

Parameters

[in,out]	duck	TSDuck execution context.
[in]	dlist	A list of binary descriptors.
[in]	index	Index of the descriptor to deserialize in dlist.

Returns: True in case of success, false if the descriptor is invalid.

◆ definingStandards()

virtual Standards ts::AbstractDescriptor::definingStandards ( ) const

overridevirtualinherited

Get the list of standards which define this object.

Returns: A bit mask of standards.

Reimplemented from ts::AbstractSignalization.

◆ isValid()

bool ts::AbstractSignalization::isValid ( ) const

inlineinherited

Check if this object is valid.

Returns: True if this object is valid.

◆ invalidate()

void ts::AbstractSignalization::invalidate ( )

inlineinherited

Invalidate this object.

This object must be rebuilt.

◆ clear()

virtual void ts::AbstractSignalization::clear ( )

virtualinherited

This method clears the content of the table or descriptor.

Upon return, the object is valid and in the same empty state as after a default constructor.

Reimplemented in ts::AbstractTable, and ts::AbstractLongTable.

◆ xmlName()

UString ts::AbstractSignalization::xmlName ( ) const

inherited

Get the XMl node name representing this table or descriptor.

Returns: The XML node name.

◆ toXML()

virtual xml::Element * ts::AbstractSignalization::toXML	(	DuckContext &	duck,
		xml::Element *	parent
	)		const

virtualinherited

This method converts this object to XML.

When this object is valid, this method creates a root node with the default XML name and then invokes buildXML() in the subclass to populate the XML node.

Important: Implementers of signalization classes shall not override this class. Implement the protected method buildXML() instead.

Parameters

[in,out]	duck	TSDuck execution context.
[in,out]	parent	The parent node for the new XML tree.

Returns: The new XML element.

Reimplemented in ts::AbstractTable.

◆ fromXML()

virtual void ts::AbstractSignalization::fromXML	(	DuckContext &	duck,
		const xml::Element *	element
	)

virtualinherited

This method converts an XML structure to a table or descriptor in this object.

In case of success, this object is replaced with the interpreted content of the XML structure. In case of error, this object is invalidated.

This method checks the name of the XML node and then invokes analyzeXML() in the subclass. Depending on the returned values of analyzeXML(), this object is either validated or invalidated.

Important: Implementers of signalization classes shall not override this class. Implement the protected method analyzeXML() instead.

Parameters

[in,out]	duck	TSDuck execution context.
[in]	element	XML element to convert.

Reimplemented in ts::AbstractTable.

◆ DataName()

template<typename INT >
requires std::integral<INT>

static UString ts::AbstractSignalization::DataName	(	const UChar *	xml_name,
		const UChar *	section,
		INT	value,
		NamesFlags	flags = `NamesFlags::NAME`,
		INT	alternate = `0`,
		size_t	bits = `0`
	)

inlinestaticinherited

Get a name from a specified section in the DVB names file.

Template Parameters

INT	An integer type.

Parameters

[in]	xml_name	Table or descriptor name, as used in XML structures.
[in]	section	Name of section to search. Not case-sensitive. The actual section in the names file is prefixed by the XML name, followed by a dot.
[in]	value	Value to get the name for.
[in]	flags	Presentation flags.
[in]	alternate	Display this integer value if flags ALTERNATE is set.
[in]	bits	Optional size in bits of the displayed data. Used in replacement of the "Bits=XX" directive in the .names file.

Returns: The corresponding name.

◆ dataName()

template<typename INT >
requires std::integral<INT>

UString ts::AbstractSignalization::dataName	(	const UChar *	section,
		INT	value,
		NamesFlags	flags = `NamesFlags::NAME`,
		INT	alternate = `0`,
		size_t	bits = `0`
	)

inlineinherited

Get a name from a specified section in the DVB names file for that signalization structure.

Template Parameters

INT	An integer type.

Parameters

[in]	section	Name of section to search. Not case-sensitive. The actual section in the names file is prefixed by the XML name of the structure, followed by a dot.
[in]	value	Value to get the name for.
[in]	flags	Presentation flags.
[in]	alternate	Display this integer value if flags ALTERNATE is set.
[in]	bits	Optional size in bits of the displayed data. Used in replacement of the "Bits=XX" directive in the .names file.

Returns: The corresponding name.

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

tsMPEG4AudioDescriptor.h

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ MPEG4AudioDescriptor()

Member Function Documentation

◆ DisplayDescriptor()

◆ clearContent()

◆ serializePayload()

◆ deserializePayload()

◆ buildXML()

◆ analyzeXML()

◆ tag()

◆ edid()

◆ duplicationMode()

◆ merge()

◆ extendedTag()

◆ serialize()

◆ deserialize() [1/2]

◆ deserialize() [2/2]

◆ definingStandards()

◆ isValid()

◆ invalidate()

◆ clear()

◆ xmlName()

◆ toXML()

◆ fromXML()

◆ DataName()

◆ dataName()