nibbles-streams

2022-07-08

Proof of concept for lossless audio compressor

Upstream URL

github.com/shamazmazum/nibbles-streams

Author

Vasily Postnicov <shamaz.mazum@gmail.com>

License

2-clause BSD
README

nibbles-streams

CI

Nibbles-streams is a wrapper around nibbles which allows you to create input and output binary streams with changeable element type and endianness.

An example:

(flexi-streams:with-output-to-sequence (stream)
  ;; Open little endian nibbles-stream with underlying stream's element-type
  (let ((output (make-instance 'nibbles-streams:nibbles-output-stream
                               :stream stream)))
    (write-byte 2 output)
    (write-sequence #(1 2 3) output)
    ;; Change element-type and endianness
    (setf (nibbles-streams:nibbles-stream-element-type output)
          '(signed-byte 16)
          (nibbles-streams:nibbles-stream-endianness output)
          :big)
    (write-byte 1000 output)
    (write-sequence #(-1 -2001 300) output)))
=> #(2 1 2 3 3 232 255 255 248 47 1 44)

The package nibble-streams export two types of streams: nibbles-input-stream and nibbles-output-stream, accessors nibbles-stream-element-type and nibbles-stream-endianness and a condition nibbles-stream-error which is signalled when a wrong element type or endianness is specified.

Supported element types

These element types are supported:

  • (unsigned-byte 8)
  • (unsigned-byte 16)
  • (unsigned-byte 32)
  • (unsigned-byte 64)
  • (signed-byte 8)
  • (signed-byte 16)
  • (signed-byte 32)
  • (signed-byte 64)

Dependencies (5)

  • fiveam
  • flexi-streams
  • nibbles
  • serapeum
  • trivial-gray-streams

Dependents (1)

  • GitHub
  • Quicklisp