Implementation of GenericContainer<MediaFileInfo, Mp4Tag, Mp4Track, Mp4Atom>. More...

#include <mp4container.h>

Inheritance diagram for TagParser::Mp4Container:

Collaboration diagram for TagParser::Mp4Container:

Public Member Functions
	Mp4Container (MediaFileInfo &fileInfo, std::uint64_t startOffset)
	Constructs a new container for the specified fileInfo at the specified startOffset.

	~Mp4Container () override

bool	supportsTrackModifications () const override
	Returns whether the implementation supports adding or removing of tracks.

bool	isFragmented () const
	Returns whether the file is fragmented.

void	reset () override
	Discards all parsing results.

ElementPosition	determineTagPosition (Diagnostics &diag) const override
	Determines the position of the tags inside the file.

ElementPosition	determineIndexPosition (Diagnostics &diag) const override
	Determines the position of the index.

Public Member Functions inherited from TagParser::GenericContainer< MediaFileInfo, Mp4Tag, Mp4Track, Mp4Atom >
	GenericContainer (MediaFileInfo &fileInfo, std::uint64_t startOffset)
	Constructs a new container for the specified fileInfo at the specified startOffset.

	~GenericContainer () override
	Destroys the container.

void	validateElementStructure (Diagnostics &diag, AbortableProgressFeedback &progress, std::uint64_t *paddingSize=nullptr)
	Parses all elements the file consists of.

MediaFileInfo &	fileInfo () const
	Returns the related file info.

Mp4Atom *	firstElement () const
	Returns the first element of the file if available; otherwiese returns nullptr.

const std::vector< std::unique_ptr< Mp4Atom > > &	additionalElements () const
	Returns all available additional elements.

std::vector< std::unique_ptr< Mp4Atom > > &	additionalElements ()
	Returns all available additional elements.

Mp4Tag *	tag (std::size_t index) override
	Returns the tag with the specified index.

std::size_t	tagCount () const override
	Returns the number of tags attached to the container.

Mp4Track *	track (std::size_t index) override
	Returns the track with the specified index.

Mp4Track *	trackById (std::uint64_t id)

std::size_t	trackCount () const override
	Returns the number of tracks the container holds.

const std::vector< std::unique_ptr< Mp4Tag > > &	tags () const
	Returns the tags of the file.

std::vector< std::unique_ptr< Mp4Tag > > &	tags ()
	Returns the tags of the file.

const std::vector< std::unique_ptr< Mp4Track > > &	tracks () const
	Returns the tracks of the file.

std::vector< std::unique_ptr< Mp4Track > > &	tracks ()
	Returns the tracks of the file.

Mp4Tag *	createTag (const TagTarget &target=TagTarget()) override
	Creates and returns a tag for the specified target.

bool	removeTag (Tag *tag) override
	Removes the specified tag from the container.

void	removeAllTags () override
	Removes all tags attached to the container.

bool	addTrack (Mp4Track *track)
	Adds the specified track to the container.

bool	removeTrack (AbstractTrack *track) override
	Removes the specified track to the container.

void	removeAllTracks () override
	Removes all tracks from the container.

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

std::iostream &	stream ()
	Returns the related stream.

void	setStream (std::iostream &stream)
	Sets the related stream.

std::uint64_t	startOffset () const
	Returns the start offset in the related stream.

CppUtilities::BinaryReader &	reader ()
	Returns the related BinaryReader.

CppUtilities::BinaryWriter &	writer ()
	Returns the related BinaryWriter.

void	parseHeader (Diagnostics &diag, AbortableProgressFeedback &progress)
	Parses the header if not parsed yet.

void	parseTags (Diagnostics &diag, AbortableProgressFeedback &progress)
	Parses the tag information if not parsed yet.

void	parseTracks (Diagnostics &diag, AbortableProgressFeedback &progress)
	Parses the tracks of the file if not parsed yet.

void	parseChapters (Diagnostics &diag, AbortableProgressFeedback &progress)
	Parses the chapters of the file if not parsed yet.

void	parseAttachments (Diagnostics &diag, AbortableProgressFeedback &progress)
	Parses the attachments of the file if not parsed yet.

void	makeFile (Diagnostics &diag, AbortableProgressFeedback &progress)
	Rewrites the file to apply changed tag information.

bool	isHeaderParsed () const
	Returns an indication whether the header has been parsed yet.

bool	areTagsParsed () const
	Returns an indication whether the tags have been parsed yet.

bool	areTracksParsed () const
	Returns an indication whether the tracks have been parsed yet.

bool	areChaptersParsed () const
	Returns an indication whether the chapters have been parsed yet.

bool	areAttachmentsParsed () const
	Returns an indication whether the attachments have been parsed yet.

virtual AbstractChapter *	chapter (std::size_t index)
	Returns the chapter with the specified index.

virtual std::size_t	chapterCount () const
	Returns the number of chapters the container holds.

virtual AbstractAttachment *	createAttachment ()
	Creates and returns a new attachment.

virtual AbstractAttachment *	attachment (std::size_t index)
	Returns the attachment with the specified index.

virtual std::size_t	attachmentCount () const
	Returns the number of attachments the container holds.

std::uint64_t	version () const
	Returns the version if known; otherwise returns 0.

std::uint64_t	readVersion () const
	Returns the "read version" if known; otherwise returns 0.

const std::string &	documentType () const
	Returns a string that describes the document type if available; otherwise returns an empty string.

std::uint64_t	doctypeVersion () const
	Returns the document type version if known; otherwise returns 0.

std::uint64_t	doctypeReadVersion () const
	Returns the document type "read version" if known; otherwise returns 0.

const std::vector< std::string > &	titles () const
	Returns the title(s) of the file.

void	setTitle (std::string_view title, std::size_t segmentIndex=0)
	Sets the title for the specified segment.

virtual bool	supportsTitle () const
	Returns whether the title property is supported.

const std::vector< std::string > &	muxingApplications () const
	Returns the muxing applications specified as meta-data.

const std::vector< std::string > &	writingApplications () const
	Returns the writing applications specified as meta-data.

virtual std::size_t	segmentCount () const
	Returns the number of segments.

CppUtilities::TimeSpan	duration () const
	Returns the duration of the file if known; otherwise returns a time span of zero ticks.

CppUtilities::DateTime	creationTime () const
	Returns the creation time of the file if known; otherwise the returned date time is null.

CppUtilities::DateTime	modificationTime () const
	Returns the modification time of the file if known; otherwise the returned date time is null.

std::uint32_t	timeScale () const
	Returns the time scale of the file if known; otherwise returns 0.

Static Public Attributes
static const CppUtilities::DateTime	epoch = DateTime::fromDate(1904, 1, 1)
	Dates within MP4 tracks are expressed as the number of seconds since this date.

Protected Member Functions
void	internalParseHeader (Diagnostics &diag, AbortableProgressFeedback &progress) override
	Internally called to parse the header.

void	internalParseTags (Diagnostics &diag, AbortableProgressFeedback &progress) override
	Internally called to parse the tags.

void	internalParseTracks (Diagnostics &diag, AbortableProgressFeedback &progress) override
	Internally called to parse the tracks.

void	internalMakeFile (Diagnostics &diag, AbortableProgressFeedback &progress) override
	Internally called to make the file.

Protected Member Functions inherited from TagParser::AbstractContainer
	AbstractContainer (std::iostream &stream, std::uint64_t startOffset)
	Constructs a new container for the specified file stream at the specified startOffset.

virtual void	internalParseChapters (Diagnostics &diag, AbortableProgressFeedback &progress)
	Internally called to parse the chapters.

virtual void	internalParseAttachments (Diagnostics &diag, AbortableProgressFeedback &progress)
	Internally called to parse the attachments.

std::vector< std::string > &	muxingApplications ()
	Returns the muxing applications specified as meta-data.

std::vector< std::string > &	writingApplications ()
	Returns the writing applications specified as meta-data.

Additional Inherited Members
Public Types inherited from TagParser::GenericContainer< MediaFileInfo, Mp4Tag, Mp4Track, Mp4Atom >
using	ContainerFileInfoType = MediaFileInfo

using	ContainerTagType = Mp4Tag

using	ContainerTrackType = Mp4Track

using	ContainerElementType = Mp4Atom

Protected Attributes inherited from TagParser::GenericContainer< MediaFileInfo, Mp4Tag, Mp4Track, Mp4Atom >
std::unique_ptr< Mp4Atom >	m_firstElement

std::vector< std::unique_ptr< Mp4Atom > >	m_additionalElements

std::vector< std::unique_ptr< Mp4Tag > >	m_tags

std::vector< std::unique_ptr< Mp4Track > >	m_tracks

Protected Attributes inherited from TagParser::AbstractContainer
std::uint64_t	m_version

std::uint64_t	m_readVersion

std::string	m_doctype

std::uint64_t	m_doctypeVersion

std::uint64_t	m_doctypeReadVersion

std::vector< std::string >	m_titles

CppUtilities::TimeSpan	m_duration

CppUtilities::DateTime	m_creationTime

CppUtilities::DateTime	m_modificationTime

std::uint32_t	m_timeScale

bool	m_headerParsed

bool	m_tagsParsed

bool	m_tracksParsed

bool	m_tracksAltered

bool	m_chaptersParsed

bool	m_attachmentsParsed

Detailed Description

Implementation of GenericContainer<MediaFileInfo, Mp4Tag, Mp4Track, Mp4Atom>.

Definition at line 18 of file mp4container.h.

Constructor & Destructor Documentation

◆ Mp4Container()

TagParser::Mp4Container::Mp4Container	(	MediaFileInfo &	fileInfo,
		std::uint64_t	startOffset
	)

Constructs a new container for the specified fileInfo at the specified startOffset.

Definition at line 39 of file mp4container.cpp.

◆ ~Mp4Container()

TagParser::Mp4Container::~Mp4Container ( )

override

Definition at line 45 of file mp4container.cpp.

Member Function Documentation

◆ determineIndexPosition()

ElementPosition TagParser::Mp4Container::determineIndexPosition ( Diagnostics & diag ) const

overridevirtual

Determines the position of the index.

Returns: Returns ElementPosition::BeforeData or ElementPosition::AfterData if the position could be determined; otherwise returns ElementPosition::Keep.

Remarks

It might be required to parse tracks before the index position can be determined.
Not be applicable for files composed of multiple segments.

See also: MediaFileInfo::indexPosition()

Reimplemented from TagParser::AbstractContainer.

Definition at line 67 of file mp4container.cpp.

◆ determineTagPosition()

ElementPosition TagParser::Mp4Container::determineTagPosition ( Diagnostics & diag ) const

overridevirtual

Determines the position of the tags inside the file.

Returns: Returns ElementPosition::BeforeData or ElementPosition::AfterData if the position could be determined; otherwise returns ElementPosition::Keep.

Remarks

It might be required to parse tags before the tag position can be determined.
Not be applicable for files composed of multiple segments.

See also: MediaFileInfo::tagPosition()

Reimplemented from TagParser::AbstractContainer.

Definition at line 55 of file mp4container.cpp.

◆ internalMakeFile()

void TagParser::Mp4Container::internalMakeFile	(	Diagnostics &	diag,
		AbortableProgressFeedback &	progress
	)

overrideprotectedvirtual

Internally called to make the file.

Must be implemented when subclassing.

Exceptions

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

Reimplemented from TagParser::AbstractContainer.

Definition at line 225 of file mp4container.cpp.

◆ internalParseHeader()

void TagParser::Mp4Container::internalParseHeader	(	Diagnostics &	diag,
		AbortableProgressFeedback &	progress
	)

overrideprotectedvirtual

Internally called to parse the header.

Must be implemented when subclassing to provide this feature.

Exceptions

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

Reimplemented from TagParser::AbstractContainer.

Definition at line 79 of file mp4container.cpp.

◆ internalParseTags()

void TagParser::Mp4Container::internalParseTags	(	Diagnostics &	diag,
		AbortableProgressFeedback &	progress
	)

overrideprotectedvirtual

Internally called to parse the tags.

Must be implemented when subclassing to provide this feature.

Exceptions

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

Reimplemented from TagParser::AbstractContainer.

Definition at line 95 of file mp4container.cpp.

◆ internalParseTracks()

void TagParser::Mp4Container::internalParseTracks	(	Diagnostics &	diag,
		AbortableProgressFeedback &	progress
	)

overrideprotectedvirtual

Internally called to parse the tracks.

Must be implemented when subclassing to provide this feature.

Exceptions

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

Reimplemented from TagParser::AbstractContainer.

Definition at line 125 of file mp4container.cpp.

◆ isFragmented()

bool TagParser::Mp4Container::isFragmented ( ) const

inline

Returns whether the file is fragmented.

Track information needs to be parsed to detect fragmentation.

Definition at line 53 of file mp4container.h.

◆ reset()

void TagParser::Mp4Container::reset ( )

overridevirtual

Discards all parsing results.

Reimplemented from TagParser::GenericContainer< MediaFileInfo, Mp4Tag, Mp4Track, Mp4Atom >.

Definition at line 49 of file mp4container.cpp.

◆ supportsTrackModifications()

bool TagParser::Mp4Container::supportsTrackModifications ( ) const

inlineoverridevirtual

Returns whether the implementation supports adding or removing of tracks.

Reimplemented from TagParser::AbstractContainer.

Definition at line 44 of file mp4container.h.

Member Data Documentation

◆ epoch

const CppUtilities::DateTime TagParser::Mp4Container::epoch = DateTime::fromDate(1904, 1, 1)

static

Dates within MP4 tracks are expressed as the number of seconds since this date.

Definition at line 29 of file mp4container.h.

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

mp4/mp4container.h
mp4/mp4container.cpp

Public Member Functions

Static Public Attributes

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Mp4Container()

◆ ~Mp4Container()

Member Function Documentation

◆ determineIndexPosition()

◆ determineTagPosition()

◆ internalMakeFile()

◆ internalParseHeader()

◆ internalParseTags()

◆ internalParseTracks()

◆ isFragmented()

◆ reset()

◆ supportsTrackModifications()

Member Data Documentation

◆ epoch