Tag Parser
6.4.0
C++ library for reading and writing MP4 (iTunes), ID3, Vorbis, Opus, FLAC and Matroska tags
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Implementation of Media::Tag for the Matroska container. More...
#include <matroskatag.h>
Public Member Functions | |
MatroskaTag () | |
Constructs a new tag. More... | |
TagType | type () const |
Returns the type of the tag as Media::TagType. More... | |
const char * | typeName () const |
Returns the type name of the tag as C-style string. More... | |
TagTextEncoding | proposedTextEncoding () const |
Returns the proposed text encoding. More... | |
bool | canEncodingBeUsed (TagTextEncoding encoding) const |
Returns an indication whether the specified encoding can be used to provide string values for the tag. More... | |
bool | supportsTarget () const |
Returns an indication whether a target is supported by the tag. More... | |
TagTargetLevel | targetLevel () const |
Returns the name of the current tag target level. More... | |
std::string | fieldId (KnownField field) const |
Returns the ID for the specified field. More... | |
KnownField | knownField (const std::string &id) const |
void | parse (EbmlElement &tagElement) |
Parses tag information from the specified tagElement. More... | |
MatroskaTagMaker | prepareMaking () |
Prepares making. More... | |
void | make (std::ostream &stream) |
Writes tag information to the specified stream (makes a "Tag"-element). More... | |
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FieldMapBasedTag () | |
Constructs a new FieldMapBasedTag. More... | |
virtual const TagValue & | value (const typename MatroskaTagField ::identifierType &id) const |
Returns the value of the field with the specified id. More... | |
const TagValue & | value (KnownField field) const |
Returns the value of the specified field. More... | |
std::vector< const TagValue *> | values (const typename MatroskaTagField ::identifierType &id) const |
Returns the values of the field with the specified id. More... | |
std::vector< const TagValue *> | values (KnownField field) const |
Returns the values of the specified field. More... | |
virtual bool | setValue (const typename MatroskaTagField ::identifierType &id, const TagValue &value) |
Assigns the given value to the field with the specified id. More... | |
bool | setValue (KnownField field, const TagValue &value) |
Assigns the given value to the specified field. More... | |
bool | setValues (const typename MatroskaTagField ::identifierType &id, const std::vector< TagValue > &values) |
Assigns the given values to the field with the specified id. More... | |
bool | setValues (KnownField field, const std::vector< TagValue > &values) |
Assigns the given values to the field with the specified id. More... | |
bool | hasField (KnownField field) const |
Returns an indication whether the specified field is present. More... | |
virtual bool | hasField (const typename MatroskaTagField ::identifierType &id) const |
Returns an indication whether the field with the specified id is present. More... | |
void | removeAllFields () |
Removes all fields from the tag. More... | |
const std::multimap< typename MatroskaTagField ::identifierType, MatroskaTagField, std::less< typename MatroskaTagField ::identifierType > > & | fields () const |
Returns the fields of the tag by providing direct access to the field map of the tag. More... | |
std::multimap< typename MatroskaTagField ::identifierType, MatroskaTagField, std::less< typename MatroskaTagField ::identifierType > > & | fields () |
Returns the fields of the tag by providing direct access to the field map of the tag. More... | |
unsigned int | fieldCount () const |
Returns the number of present fields. More... | |
virtual KnownField | knownField (const typename MatroskaTagField ::identifierType &id) const=0 |
Returns the field for the specified ID. More... | |
bool | supportsField (KnownField field) const |
Returns an indication whether the specified field is supported by the tag. More... | |
virtual TagDataType | proposedDataType (const typename MatroskaTagField ::identifierType &id) const |
Returns the proposed data type for the field with the specified id. More... | |
int | insertFields (const FieldMapBasedTag< MatroskaTagField, std::less< typename MatroskaTagField ::identifierType > > &from, bool overwrite) |
Inserts all fields from another tag of the same field type and compare function. More... | |
unsigned int | insertValues (const Tag &from, bool overwrite) |
Inserts all compatible values from another Tag. More... | |
void | ensureTextValuesAreProperlyEncoded () |
Ensures the encoding of all assigned text values is supported by the tag by converting the character set if neccessary. More... | |
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virtual | ~Tag () |
Destroys the Tag. More... | |
std::string | toString () const |
Returns a string representation of the tag. More... | |
const std::string & | version () const |
Returns the version of the tag as std::string. More... | |
uint32 | size () const |
Returns the size of the tag in bytes. More... | |
const TagTarget & | target () const |
Returns the target of tag. More... | |
void | setTarget (const TagTarget &target) |
Sets the target of tag. More... | |
const char * | targetLevelName () const |
Returns the name of the current target level. More... | |
bool | isTargetingLevel (TagTargetLevel tagTargetLevel) const |
Returns whether the tag is targeting the specified tagTargetLevel. More... | |
std::string | targetString () const |
Returns the string representation for the assigned tag target. More... | |
virtual TagDataType | proposedDataType (KnownField field) const |
Returns the proposed data type for the specified field as TagDataType. More... | |
virtual bool | supportsDescription (KnownField field) const |
Returns an indications whether the specified field supports descriptions. More... | |
virtual bool | supportsMimeType (KnownField field) const |
Returns an indications whether the specified field supports mime types. More... | |
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const NotificationList & | notifications () const |
Returns notifications for the current object. More... | |
bool | hasNotifications () const |
Returns an indication whether there are notifications for the current object. More... | |
bool | hasCriticalNotifications () const |
Returns an indication whether there are critical notifications for the current object. More... | |
NotificationType | worstNotificationType () const |
Returns the worst notification type. More... | |
const std::string & | currentStatus () const |
Returns a status information for the current object. More... | |
double | currentPercentage () const |
Returns the progress percentage of the current object. More... | |
size_t | registerCallback (CallbackFunction callback) |
Registers a callback function. More... | |
void | unregisterCallback (size_t id) |
Unregisters a previously registered callback function whith the specified id. More... | |
void | unregisterAllCallbacks () |
Unregisters all callback functions. More... | |
void | forwardStatusUpdateCalls (StatusProvider *other=nullptr) |
Forwards all status updates calls to the specified statusProvider. More... | |
StatusProvider * | usedProvider () |
Returns the provider which callback functions will be called when the status or the percentage is updated. More... | |
void | tryToAbort () |
Commands the object to abort the current operation. More... | |
bool | isAborted () const |
Returns an indication whether the current operation should be aborted. More... | |
void | invalidateStatus () |
Invalidates the current status. More... | |
void | invalidateNotifications () |
Invalidates the object's notifications. More... | |
void | updateStatus (const std::string &status) |
This method is meant to be called by the derived class to report updated status information. More... | |
void | updateStatus (const std::string &status, double percentage) |
This method is meant to be called by the derived class to report updated status information. More... | |
void | updatePercentage (double percentage) |
This method is meant to be called by the derived class to report updated progress percentage only. More... | |
void | addNotification (const Notification ¬ification) |
This protected method is meant to be called by the derived class to add a notification. More... | |
void | addNotification (NotificationType type, const std::string &message, const std::string &context) |
This protected method is meant to be called by the derived class to add a notification of the specified type, message and context. More... | |
void | addNotifications (const StatusProvider &from) |
This protected method is meant to be called by the derived class to add all notifications from another StatusProvider instance. More... | |
void | addNotifications (const std::string &higherContext, const StatusProvider &from) |
This protected method is meant to be called by the derived class to add all notifications from another StatusProvider instance. More... | |
void | addNotifications (const NotificationList ¬ifications) |
This protected method is meant to be called by the derived class to add the specified notifications. More... | |
Static Public Attributes | |
static constexpr TagType | tagType = TagType::MatroskaTag |
Additional Inherited Members | |
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typedef MatroskaTagField | fieldType |
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typedef std::function< void(StatusProvider &sender)> | CallbackFunction |
typedef std::vector< CallbackFunction > | CallbackVector |
typedef std::pair< int, CallbackFunction > | CallbackPair |
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Tag () | |
Constructs a new Tag. More... | |
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StatusProvider () | |
Constructs a new StatusProvider. More... | |
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std::string | m_version |
uint32 | m_size |
TagTarget | m_target |
Implementation of Media::Tag for the Matroska container.
Definition at line 50 of file matroskatag.h.
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inline |
Constructs a new tag.
Definition at line 78 of file matroskatag.h.
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inlinevirtual |
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.
Reimplemented from Media::Tag.
Definition at line 106 of file matroskatag.h.
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virtual |
Returns the ID for the specified field.
Needs to be implemented when subclassing.
Implements Media::FieldMapBasedTag< MatroskaTagField >.
Definition at line 18 of file matroskatag.cpp.
KnownField Media::MatroskaTag::knownField | ( | const std::string & | id | ) | const |
Definition at line 48 of file matroskatag.cpp.
void Media::MatroskaTag::make | ( | std::ostream & | stream | ) |
Writes tag information to the specified stream (makes a "Tag"-element).
Throws | std::ios_base::failure when an IO error occurs. |
Throws | Media::Failure or a derived exception when a making error occurs. |
Definition at line 138 of file matroskatag.cpp.
void Media::MatroskaTag::parse | ( | EbmlElement & | tagElement | ) |
Parses tag information from the specified tagElement.
Throws | std::ios_base::failure when an IO error occurs. |
Throws | Media::Failure or a derived exception when a parsing error occurs. |
Definition at line 88 of file matroskatag.cpp.
MatroskaTagMaker Media::MatroskaTag::prepareMaking | ( | ) |
Prepares making.
Throws | Media::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.
Definition at line 125 of file matroskatag.cpp.
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inlinevirtual |
Returns the proposed text encoding.
This is TagTextEncoding::Latin1 by default an 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 returns such an encoding.
Reimplemented from Media::Tag.
Definition at line 101 of file matroskatag.h.
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inlinevirtual |
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 Media::Tag.
Definition at line 81 of file matroskatag.h.
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inlinevirtual |
Returns the name of the current tag target level.
Reimplemented from Media::Tag.
Definition at line 86 of file matroskatag.h.
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inlinevirtual |
Returns the type of the tag as Media::TagType.
This is TagType::Unspecified by default and might be overwritten when subclassing.
Reimplemented from Media::Tag.
Definition at line 91 of file matroskatag.h.
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inlinevirtual |
Returns the type name of the tag as C-style string.
This is "unspecified" by default and might be overwritten when subclassing.
Reimplemented from Media::Tag.
Definition at line 96 of file matroskatag.h.
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static |
Definition at line 55 of file matroskatag.h.