Struct chd::codecs::HuffmanCodec

pub struct HuffmanCodec;

Available on codec_api only.

MAME 8-bit Huffman (huff) decompression codec.

Format Details

The Huffman codec uses a Huffman-encoded Huffman tree with the the default Huffman settings of

• NUM_CODES: 256
• MAX_BITS: 16

The last decoded code from the input buffer may not contain enough bits for a full byte is reconstructed by shifting zero-bits in from the right. See the source code for huffman.rs for more details.

Buffer Restrictions

Each compressed Huffman hunk decompresses to a hunk-sized chunk. The input buffer must contain exactly enough data to fill the output buffer when decompressed.

Trait Implementations

impl CodecImplementation for HuffmanCodec

fn new(_: u32) -> Result<Self>

Creates a new instance of this codec for the provided hunk size.

fn decompress( &mut self, input: &[u8], output: &mut [u8], ) -> Result<DecompressResult>

Decompress compressed bytes from the input buffer into the output buffer.

impl CompressionCodecType for HuffmanCodec

fn codec_type(&self) -> CodecType

Returns the known CodecType that this codec implements.

impl CompressionCodec for HuffmanCodec