celt-ruby

http://www.github.com/perrym5/celt-ruby

DESCRIPTION:

CELT-Ruby is a Ruby Gem for working with the CELT Audio Codec. CELT-Ruby uses the Ruby-FFI extension to wrap the native CELT library code. This means that you must have CELT installed in order for this gem to work.

FEATURES:

This gem was designed to fill a specific role in another one of my projects. As a result, the feature set is relatively small compared to the native libraries. However, I will accept any pull requests with additional functionality should someone need it.

What this library can do:

• Encode raw audio to CELT

REQUIREMENTS:

• Ruby >= 1.9.2

• CELT 0.7 Library

INSTALL:

[sudo] gem install celt-ruby

USAGE:

# Create new encoder with a sample rate of 48 kHz, a frame size of 480 bytes and 1 channel
encoder = Celt::Encoder.new 48000, 480, 1
# Set the prediction request to 0
encoder.prediction_request = 0
# Set the VBR rate to 60,000
encoder.vbr_rate = 60000

# Return the bitstream version for this version of CELT
encoder.bitstream_version

# Encode some raw audio
compressed_size = [@encoder.vbr_rate / 800, 127].min
encoded = encoder.encode(raw_audio, compressed_size)

# Safely destroy encoder
encoder.destroy