Enum mp4ameta::Data

pub enum Data {
    Reserved(Vec<u8>),
    Utf8(String),
    Utf16(String),
    Jpeg(Vec<u8>),
    Png(Vec<u8>),
    BeSigned(Vec<u8>),
    Bmp(Vec<u8>),
}

An enum that holds different types of data defined by Table 3-5 Well-known data types.

Variants

Reserved(Vec<u8>)

A value containing reserved type data inside a Vec<u8>.

Utf8(String)

A value containing a String decoded from, or to be encoded to utf-8.

Utf16(String)

A value containing a String decoded from, or to be encoded to utf-16.

Jpeg(Vec<u8>)

A value containing jpeg byte data inside a Vec<u8>.

Png(Vec<u8>)

A value containing png byte data inside a Vec<u8>.

BeSigned(Vec<u8>)

A value containing big endian signed integer inside a Vec<u8>.

Bmp(Vec<u8>)

A value containing bmp byte data inside a Vec<u8>.

Implementations

impl Data

pub fn len(&self) -> u64

Returns the length in bytes.

pub fn is_empty(&self) -> bool

Returns true if the data is empty, false otherwise.

pub const fn is_bytes(&self) -> bool

Returns true if self is of type Self::Reserved or Self::BeSigned, false otherwise.

pub const fn is_string(&self) -> bool

Returns true if self is of type Self::Utf8 or Self::Utf16, false otherwise.

pub const fn is_image(&self) -> bool

Returns true if self is of type Self::Jpeg, Self::Png or Self::Bmp false otherwise.

pub const fn is_reserved(&self) -> bool

Returns true if self is of type Self::Reserved false otherwise.

pub const fn is_utf8(&self) -> bool

Returns true if self is of type Self::Utf8 false otherwise.

pub const fn is_utf16(&self) -> bool

Returns true if self is of type Self::Utf16 false otherwise.

pub const fn is_jpeg(&self) -> bool

Returns true if self is of type Self::Jpeg false otherwise.

pub const fn is_png(&self) -> bool

Returns true if self is of type Self::Png false otherwise.

pub const fn is_be_signed(&self) -> bool

Returns true if self is of type Self::BeSigned false otherwise.

pub const fn is_bmp(&self) -> bool

Returns true if self is of type Self::Bmp false otherwise.

pub const fn bytes(&self) -> Option<&Vec<u8>>

Returns a byte vec reference if self is of type Self::Reserved or Self::BeSigned.

pub fn bytes_mut(&mut self) -> Option<&mut Vec<u8>>

Returns a mutable byte vec reference if self is of type Self::Reserved or Self::BeSigned.

pub fn take_bytes(self) -> Option<Vec<u8>>

Consumes self and returns a byte vec if self is of type Self::Reserved or Self::BeSigned.

pub fn string(&self) -> Option<&str>

Returns a string reference if self is either of type Self::Utf8 or Self::Utf16.

pub fn string_mut(&mut self) -> Option<&mut String>

Returns a mutable string reference if self is either of type Self::Utf8 or Self::Utf16.

pub fn take_string(self) -> Option<String>

Consumes self and returns a string if self is either of type Self::Utf8 or Self::Utf16.

pub const fn image(&self) -> Option<&Data>

Returns a data reference if self is of type Self::Jpeg, Self::Png or Self::Bmp.

pub fn image_mut(&mut self) -> Option<&mut Data>

Returns a data reference if self is of type Self::Jpeg, Self::Png or Self::Bmp.

pub fn take_image(self) -> Option<Data>

Consumes self and returns data if self is of type Self::Jpeg, Self::Png or Self::Bmp.

pub const fn image_data(&self) -> Option<&Vec<u8>>

Returns a byte vec reference if self is of type Self::Jpeg, Self::Png or Self::Bmp.

pub fn image_data_mut(&mut self) -> Option<&mut Vec<u8>>

Returns a mutable byte vec reference if self is of type Self::Jpeg, Self::Png or Self::Bmp.

pub fn take_image_data(self) -> Option<Vec<u8>>

Consumes self and returns a byte vec if self is of type Self::Jpeg, Self::Png or Self::Bmp.

pub const fn reserved(&self) -> Option<&Vec<u8>>

Returns a byte vec reference if self is of type Self::Reserved.

pub const fn utf8(&self) -> Option<&String>

Returns a string reference if self is of type Self::Utf8.

pub const fn utf16(&self) -> Option<&String>

Returns a string reference if self is of type Self::Utf16.

pub const fn jpeg(&self) -> Option<&Vec<u8>>

Returns a byte vec reference if self is of type Self::Jpeg.

pub const fn png(&self) -> Option<&Vec<u8>>

Returns a byte vec reference if self is of type Self::Png.

pub const fn be_signed(&self) -> Option<&Vec<u8>>

Returns a byte vec reference if self is of type Self::BeSigned.

pub const fn bmp(&self) -> Option<&Vec<u8>>

Returns a byte vec reference if self is of type Self::Bmp.

pub fn write_typed(&self, writer: &mut impl Write) -> Result<()>

Attempts to write the typed data to the writer.

pub fn write_raw(&self, writer: &mut impl Write) -> Result<()>

Attempts to write the raw data to the writer.

Trait Implementations

impl Clone for Data

fn clone(&self) -> Data

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Data

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Data

impl PartialEq<Data> for Data

fn eq(&self, other: &Data) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Data) -> bool

This method tests for !=.

impl StructuralEq for Data

impl StructuralPartialEq for Data