#SELA ###SimplE Lossless Audio A simplified lossless audio codec written for my ongoing project.

###Block Diagrams

###Main Components

• Linear prediction filter (lpc.c)
• Golomb-Rice compressor and decompressor (rice.c)
• Encoder (encoder.c)
• Decoder (decoder.c)
• Command line player (selaplay.c)
• Matlab implementation of Linear prediction filter can be found in 'matlab-tests' folder

###Build requirements

• gcc (You can use clang if you modify the CC variable in the Makefile)
• GNU make
• Standard math library for building the encoder and decoder.
• POSIX threading and pulseaudio/libao developement libraries for building the command line player. Note : On Windows you will need cygwin to build the command line player. Otherwise MinGW is sufficient.

###Build instructions

• cd to the directory
• type make all to build the encoder & decoder
• type make selaplay_ao or make selaplay_pulse to build the player using either libao/pulseaudio libraries
• type make lpctest && make ricetest to build the tests
• type make wavdiff to build the diff utility for .wav files

###References

• Linear Prediction
  • Wikipedia
  • A detailed pdf
• Golomb-Rice lossless compression algorithm
  • Wikipedia
  • Here is an implementation
• FLAC overview
• Paper on shorten, the original open source lossless codec
• ISO/IEC 14496 Part 3, Subpart 11 (Audio Lossless Coding)

###License : MIT License