Tag Parser
6.2.2
C++ library for reading and writing MP4 (iTunes), ID3, Vorbis, Opus, FLAC and Matroska tags
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The TagValue class wraps values of different types. More...
#include <tagvalue.h>
Public Member Functions | |
TagValue () | |
Constructs an empty TagValue. More... | |
TagValue (const char *text, std::size_t textSize, TagTextEncoding textEncoding=TagTextEncoding::Latin1, TagTextEncoding convertTo=TagTextEncoding::Unspecified) | |
Constructs a new TagValue holding a copy of the given text. More... | |
TagValue (const std::string &text, TagTextEncoding textEncoding=TagTextEncoding::Latin1, TagTextEncoding convertTo=TagTextEncoding::Unspecified) | |
Constructs a new TagValue holding a copy of the given text. More... | |
TagValue (int value) | |
Constructs a new TagValue holding the given integer value. More... | |
TagValue (const char *data, size_t length, TagDataType type=TagDataType::Undefined, TagTextEncoding encoding=TagTextEncoding::Latin1) | |
Constructs a new TagValue with a copy of the given data. More... | |
TagValue (std::unique_ptr< char[]> &&data, size_t length, TagDataType type=TagDataType::Binary, TagTextEncoding encoding=TagTextEncoding::Latin1) | |
Constructs a new TagValue holding with the given data. More... | |
TagValue (const PositionInSet &value) | |
Constructs a new TagValue holding a copy of the given PositionInSet value. More... | |
TagValue (const TagValue &other) | |
Constructs a new TagValue holding a copy of the given TagValue instance. More... | |
TagValue (TagValue &&other)=default | |
~TagValue () | |
Destroys the TagValue. More... | |
TagValue & | operator= (const TagValue &other) |
Assigns the value of another TagValue to the current instance. More... | |
TagValue & | operator= (TagValue &&other)=default |
bool | operator== (const TagValue &other) const |
Returns whether both instances are equal. More... | |
bool | operator!= (const TagValue &other) const |
Returns whether both instances are not equal. More... | |
bool | isEmpty () const |
Returns an indication whether an value is assigned. More... | |
void | clearData () |
Clears the assigned data. More... | |
void | clearMetadata () |
Wipes assigned meta data. More... | |
void | clearDataAndMetadata () |
Wipes assigned data including meta data. More... | |
TagDataType | type () const |
Returns the type of the assigned value. More... | |
std::string | toString (TagTextEncoding encoding=TagTextEncoding::Unspecified) const |
Converts the value of the current TagValue object to its equivalent std::string representation. More... | |
void | toString (std::string &result, TagTextEncoding encoding=TagTextEncoding::Unspecified) const |
Converts the value of the current TagValue object to its equivalent std::string representation. More... | |
std::u16string | toWString (TagTextEncoding encoding=TagTextEncoding::Unspecified) const |
Converts the value of the current TagValue object to its equivalent std::wstring representation. More... | |
void | toWString (std::u16string &result, TagTextEncoding encoding=TagTextEncoding::Unspecified) const |
Converts the value of the current TagValue object to its equivalent std::u16string representation. More... | |
int32 | toInteger () const |
Converts the value of the current TagValue object to its equivalent integer representation. More... | |
int | toStandardGenreIndex () const |
Converts the value of the current TagValue object to its equivalent standard genre index. More... | |
PositionInSet | toPositionInSet () const |
Converts the value of the current TagValue object to its equivalent PositionInSet representation. More... | |
ChronoUtilities::TimeSpan | toTimeSpan () const |
Converts the value of the current TagValue object to its equivalent TimeSpan representation. More... | |
ChronoUtilities::DateTime | toDateTime () const |
Converts the value of the current TagValue object to its equivalent DateTime representation. More... | |
size_t | dataSize () const |
Returns the size of the assigned value in bytes. More... | |
char * | dataPointer () const |
Returns a pointer to the raw data assigned to the current instance. More... | |
const std::string & | description () const |
Returns the description. More... | |
void | setDescription (const std::string &value, TagTextEncoding encoding=TagTextEncoding::Latin1) |
Sets the description. More... | |
const std::string & | mimeType () const |
Returns the MIME type. More... | |
void | setMimeType (const std::string &value) |
Sets the MIME type. More... | |
const std::string & | language () const |
Returns the language. More... | |
void | setLanguage (const std::string &value) |
Sets the language. More... | |
bool | isLabeledAsReadonly () const |
Returns an indication whether the value is labeled as read-only. More... | |
void | setReadonly (bool value) |
Sets whether the TagValue is labeled as read-only. More... | |
TagTextEncoding | dataEncoding () const |
Returns the data encoding. More... | |
void | convertDataEncoding (TagTextEncoding encoding) |
Converts the currently assigned text value to the specified encoding. More... | |
void | convertDataEncodingForTag (const Tag *tag) |
Ensures the encoding of the currently assigned text value is supported by the specified tag. More... | |
TagTextEncoding | descriptionEncoding () const |
Returns the description encoding. More... | |
void | assignText (const char *text, std::size_t textSize, TagTextEncoding textEncoding=TagTextEncoding::Latin1, TagTextEncoding convertTo=TagTextEncoding::Unspecified) |
Assigns a copy of the given text. More... | |
void | assignText (const std::string &text, TagTextEncoding textEncoding=TagTextEncoding::Latin1, TagTextEncoding convertTo=TagTextEncoding::Unspecified) |
Assigns a copy of the given text. More... | |
void | assignInteger (int value) |
Assigns the given integer value. More... | |
void | assignStandardGenreIndex (int index) |
Assigns the given standard genre index to be assigned. More... | |
void | assignData (const char *data, size_t length, TagDataType type=TagDataType::Binary, TagTextEncoding encoding=TagTextEncoding::Latin1) |
Assigns a copy of the given data. More... | |
void | assignData (std::unique_ptr< char[]> &&data, size_t length, TagDataType type=TagDataType::Binary, TagTextEncoding encoding=TagTextEncoding::Latin1) |
Assigns the given data. More... | |
void | assignPosition (PositionInSet value) |
Assigns the given PositionInSet value. More... | |
void | assignTimeSpan (ChronoUtilities::TimeSpan value) |
Assigns the given TimeSpan value. More... | |
void | assignDateTime (ChronoUtilities::DateTime value) |
Assigns the given DateTime value. More... | |
Static Public Member Functions | |
static const TagValue & | empty () |
Returns an empty TagValue. More... | |
The TagValue class wraps values of different types.
It is meant to be assigned to a tag field.
For a list of supported types see Media::TagDataType.
Definition at line 63 of file tagvalue.h.
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Constructs an empty TagValue.
Definition at line 143 of file tagvalue.h.
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Constructs a new TagValue holding a copy of the given text.
text | Specifies the text to be assigned. |
textSize | Specifies the size of text. (The actual number of bytes, not the number of characters.) |
textEncoding | Specifies the encoding of the given text. |
convertTo | Specifies the encoding to convert text to; set to TagTextEncoding::Unspecified to use textEncoding without any character set conversions. |
Throws | a ConversionException if the conversion the specified character set fails. |
Definition at line 161 of file tagvalue.h.
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Constructs a new TagValue holding a copy of the given text.
text | Specifies the text to be assigned. |
textEncoding | Specifies the encoding of the given text. |
convertTo | Specifies the encoding to convert text to; set to TagTextEncoding::Unspecified to use textEncoding without any character set conversions. |
Throws | a ConversionException if the conversion the specified character set fails. |
Definition at line 177 of file tagvalue.h.
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Constructs a new TagValue holding the given integer value.
Definition at line 187 of file tagvalue.h.
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Constructs a new TagValue with a copy of the given data.
data | Specifies a pointer to the data. |
length | Specifies the length of the data. |
type | Specifies the type of the data as TagDataType. |
encoding | Specifies the encoding of the data as TagTextEncoding. The encoding will only be considered if a text is assigned. |
Definition at line 201 of file tagvalue.h.
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Constructs a new TagValue holding with the given data.
The data is not copied. It is moved.
data | Specifies a pointer to the data. |
length | Specifies the length of the data. |
type | Specifies the type of the data as TagDataType. |
encoding | Specifies the encoding of the data as TagTextEncoding. The encoding will only be considered if a text is assigned. |
Definition at line 229 of file tagvalue.h.
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Constructs a new TagValue holding a copy of the given PositionInSet value.
value | Specifies the PositionInSet. |
Definition at line 245 of file tagvalue.h.
Media::TagValue::TagValue | ( | const TagValue & | other | ) |
Constructs a new TagValue holding a copy of the given TagValue instance.
other | Specifies another TagValue instance. |
Definition at line 31 of file tagvalue.cpp.
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Media::TagValue::~TagValue | ( | ) |
Destroys the TagValue.
Definition at line 126 of file tagvalue.cpp.
void Media::TagValue::assignData | ( | const char * | data, |
size_t | length, | ||
TagDataType | type = TagDataType::Binary , |
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TagTextEncoding | encoding = TagTextEncoding::Latin1 |
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Assigns a copy of the given data.
data | Specifies the data to be assigned. |
length | Specifies the length of the data. |
type | Specifies the type of the data as TagDataType. |
encoding | Specifies the encoding of the data as TagTextEncoding. The encoding will only be considered if a text is assigned. |
Definition at line 629 of file tagvalue.cpp.
void Media::TagValue::assignData | ( | std::unique_ptr< char[]> && | data, |
size_t | length, | ||
TagDataType | type = TagDataType::Binary , |
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TagTextEncoding | encoding = TagTextEncoding::Latin1 |
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Assigns the given data.
Takes ownership.
The specified data is not copied. It is moved.
data | Specifies the data to be assigned. |
length | Specifies the length of the data. |
type | Specifies the type of the data as TagDataType. |
encoding | Specifies the encoding of the data as TagTextEncoding. The encoding will only be considered if a text is assigned. |
Definition at line 659 of file tagvalue.cpp.
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Assigns the given DateTime value.
Definition at line 296 of file tagvalue.h.
void Media::TagValue::assignInteger | ( | int | value | ) |
Assigns the given integer value.
value | Specifies the integer to be assigned. |
Definition at line 601 of file tagvalue.cpp.
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Assigns the given PositionInSet value.
Definition at line 275 of file tagvalue.h.
void Media::TagValue::assignStandardGenreIndex | ( | int | index | ) |
Assigns the given standard genre index to be assigned.
index | Specifies the index to be assigned. |
Definition at line 615 of file tagvalue.cpp.
void Media::TagValue::assignText | ( | const char * | text, |
std::size_t | textSize, | ||
TagTextEncoding | textEncoding = TagTextEncoding::Latin1 , |
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TagTextEncoding | convertTo = TagTextEncoding::Unspecified |
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Assigns a copy of the given text.
text | Specifies the text to be assigned. |
textSize | Specifies the size of text. (The actual number of bytes, not the number of characters.) |
textEncoding | Specifies the encoding of the given text. |
convertTo | Specifies the encoding to convert text to; set to TagTextEncoding::Unspecified to use textEncoding without any character set conversions. |
Throws | a ConversionException if the conversion the specified character set fails. |
Definition at line 550 of file tagvalue.cpp.
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Assigns a copy of the given text.
text | Specifies the text to be assigned. |
textEncoding | Specifies the encoding of the given text. |
convertTo | Specifies the encoding to convert text to; set to TagTextEncoding::Unspecified to use textEncoding without any character set conversions. |
Throws | a ConversionException if the conversion the specified character set fails. |
Definition at line 267 of file tagvalue.h.
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Assigns the given TimeSpan value.
Definition at line 288 of file tagvalue.h.
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Clears the assigned data.
Definition at line 351 of file tagvalue.h.
void Media::TagValue::clearDataAndMetadata | ( | ) |
Wipes assigned data including meta data.
Definition at line 151 of file tagvalue.cpp.
void Media::TagValue::clearMetadata | ( | ) |
Wipes assigned meta data.
Definition at line 136 of file tagvalue.cpp.
void Media::TagValue::convertDataEncoding | ( | TagTextEncoding | encoding | ) |
Converts the currently assigned text value to the specified encoding.
Throws | ConversionUtilities::ConversionException() if the conversion fails. |
Definition at line 343 of file tagvalue.cpp.
void Media::TagValue::convertDataEncodingForTag | ( | const Tag * | tag | ) |
Ensures the encoding of the currently assigned text value is supported by the specified tag.
Definition at line 384 of file tagvalue.cpp.
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Returns the data encoding.
Definition at line 475 of file tagvalue.h.
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Returns a pointer to the raw data assigned to the current instance.
Definition at line 372 of file tagvalue.h.
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Returns the size of the assigned value in bytes.
Definition at line 361 of file tagvalue.h.
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Returns the description.
Definition at line 383 of file tagvalue.h.
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Returns the description encoding.
Definition at line 485 of file tagvalue.h.
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Returns an empty TagValue.
Definition at line 699 of file tagvalue.cpp.
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Returns an indication whether an value is assigned.
Definition at line 340 of file tagvalue.h.
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Returns an indication whether the value is labeled as read-only.
Definition at line 452 of file tagvalue.h.
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Returns the language.
Definition at line 428 of file tagvalue.h.
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Returns the MIME type.
Definition at line 407 of file tagvalue.h.
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Returns whether both instances are not equal.
Definition at line 253 of file tagvalue.h.
Assigns the value of another TagValue to the current instance.
Definition at line 50 of file tagvalue.cpp.
bool Media::TagValue::operator== | ( | const TagValue & | other | ) | const |
Returns whether both instances are equal.
If the data types are not equal, two instances are still considered equal if the string representation is identical. The encoding and meta data must be equal as well (if relevant for the data type).
Definition at line 77 of file tagvalue.cpp.
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Sets the description.
value | Specifies the description. |
encoding | Specifies the encoding used to provide the description. |
Definition at line 396 of file tagvalue.h.
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Sets the language.
value | Specifies the language. |
Definition at line 439 of file tagvalue.h.
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Sets the MIME type.
value | Specifies the mime type. |
Definition at line 418 of file tagvalue.h.
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Sets whether the TagValue is labeled as read-only.
Definition at line 465 of file tagvalue.h.
DateTime Media::TagValue::toDateTime | ( | ) | const |
Converts the value of the current TagValue object to its equivalent DateTime representation.
Throws | ConversionException on failure. |
Definition at line 293 of file tagvalue.cpp.
int32 Media::TagValue::toInteger | ( | ) | const |
Converts the value of the current TagValue object to its equivalent integer representation.
Throws | ConversionException on failure. |
Definition at line 162 of file tagvalue.cpp.
PositionInSet Media::TagValue::toPositionInSet | ( | ) | const |
Converts the value of the current TagValue object to its equivalent PositionInSet representation.
Throws | ConversionException on failure. |
Definition at line 228 of file tagvalue.cpp.
int Media::TagValue::toStandardGenreIndex | ( | ) | const |
Converts the value of the current TagValue object to its equivalent standard genre index.
Throws | ConversionException on failure. |
Definition at line 190 of file tagvalue.cpp.
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Converts the value of the current TagValue object to its equivalent std::string representation.
encoding | Specifies the encoding to to be used; set to TagTextEncoding::Unspecified to use the present encoding without any character set conversion. |
Throws | ConversionException on failure. |
Definition at line 316 of file tagvalue.h.
void Media::TagValue::toString | ( | std::string & | result, |
TagTextEncoding | encoding = TagTextEncoding::Unspecified |
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) | const |
Converts the value of the current TagValue object to its equivalent std::string representation.
result | Specifies the string to store the result. |
encoding | Specifies the encoding to to be used; set to TagTextEncoding::Unspecified to use the present encoding without any character set conversion. |
Throws | ConversionException on failure. |
Definition at line 400 of file tagvalue.cpp.
TimeSpan Media::TagValue::toTimeSpan | ( | ) | const |
Converts the value of the current TagValue object to its equivalent TimeSpan representation.
Throws | ConversionException on failure. |
Definition at line 265 of file tagvalue.cpp.
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Converts the value of the current TagValue object to its equivalent std::wstring representation.
Throws | ConversionException on failure. |
Definition at line 329 of file tagvalue.h.
void Media::TagValue::toWString | ( | std::u16string & | result, |
TagTextEncoding | encoding = TagTextEncoding::Unspecified |
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) | const |
Converts the value of the current TagValue object to its equivalent std::u16string representation.
Throws | ConversionException on failure. |
Definition at line 473 of file tagvalue.cpp.
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Returns the type of the assigned value.
Definition at line 304 of file tagvalue.h.