Struct SourceBlockEncoder 

pub struct SourceBlockEncoder { /* private fields */ }

A struct that represents a source block encoder that uses Raptor codes.

Implementations

impl SourceBlockEncoder

pub fn new( source_block: &[u8], max_source_symbols: usize, ) -> Result<Self, &'static str>

Create a source block encoder, passing the list of source symbols

Parameters

• source_block: A slice of vectors containing the source symbols.
• max_source_symbols: Max number of source symbols inside the source block

Returns a Result containing:

• Ok(SourceBlockEncoder) if the encoder was successfully created.
• Err(&'static str) if the encoder could not be created (for example, if the partitionning of the source_block results in too few encoding symbols (k < 4), leading to a not fully specified matrix).

pub fn nb_source_symbols(&self) -> u32

Return the number of source symbols (k) inside the block

pub fn fountain(&mut self, esi: u32) -> Vec<u8>

Generates an encoding symbol with the specified Encoding Symbol Identifier (ESI).

This method generates a encoding symbol using the Raptor code and the intermediate symbols generated during the initialization of the encoder.

Parameters

• esi: The Encoding Symbol Identifier (ESI) of the desired encoding symbol.

Returns

A tuple containing:

• Vec<u8> : The generated encoding symbol