Encoder

class pyerasure.Encoder(field: Union[Binary, Binary4, Binary8], symbols: int, symbol_bytes: int)

The encoder class is used to encode a set of symbols.

property block_bytes: int

The size of the block in bytes.

encode_symbol(coefficients: bytes) → bytearray

Encode a symbol based on the given coefficients.

Parameters

coefficients – The coding coefficients that describe the encoding.

Returns

The encoded symbol.

property field: Union[Binary, Binary4, Binary8]

The chosen finite field.

is_symbol_set(index: int) → bool

Check if a symbol is set.

Parameters

index – The index of the symbol.

Returns

True if the symbol set.

property rank: int

The rank of the encoding matrix, i.e., the number of symbols.

set_symbol(index: int, symbol_data: bytes)

Set a symbol.

Parameters

• index – The index of the symbol.
• symbol_data – The data of the symbol.

set_symbols(block_data: bytes)

Set all symbols.

Parameters

block_data – The data of the block.

property symbol_bytes: int

The size of a symbol in bytes.

symbol_data(index: int) → bytes

Get the data of a symbol.

Parameters

index – The index of the symbol.

Returns

The data of the symbol.

property symbols: int

The number of symbols.