Version 1.4.0

This release includes a number of new objects, new methods for existing objects, better support for error handling, integrated GitHub workflows for testing & code coverage, and general stability enhancements:

• autotest
  • automated code coverage testing (72%)
• build
  • incorporated error handling in most methods with integer-based return value
• agc
  • added interface to check if AGC is locked or not
• buffer
  • cbuffer: added method to check if buffer is empty
• dotprod
  • included methods to create/recreate object in reverse order
• equalization
  • eqlms: added convenience methods for copying coefficients and running as
    a decimator
• fft
  • spgram: adding convenience methods for getting/setting properties
  • spwaterfall: adding convenience methods for getting/setting properties
• filter
  • new direct digital synthesis (DDS) family of objects which allows
    cascaded half-band interpolation/decimation with arbitrary frequency
    translation
  • new fractional delay (fdelay) family of objects which allow for
    adjustable large fractional delays
  • firdecim: adding convenience method to get decimation rate
  • firfilt: adding convenience methods to get/copy coefficients as well as
    create object using firdespm algorithm
  • firinterp: adding convenience methods for new ways to create object as
    well as getting object properties
  • firpfb: adding convenience methods to create default object, write
    samples
  • resamp2: adding methods to get/set output scale
  • rresamp: adding methods to operate with block execution
• framing
  • new arbitrary rate symstreamr object (derived from symstream family)
  • framesync64: adding methods for getting/resetting frame data statistics
    as well as getting/setting detection threshold
  • gmskframegen/gmskframesync: extending methods to support easier
    operation, getting/resetting frame data statistics, more control over
    parameters in create methods
  • ofdmflexframesync: adding methods to get/reset frame data statistics
  • qdetector: adding method to get threshold
  • qpilotsync: adding method to get error vector magnitude
  • symstream: adding convenience methods for getting properties
  • symtrack: adding convenience methods for getting/setting properties
• math
  • adding liquid_ prefix to winodowing functions while supporting backwards
    compatibility with older methods
  • adding liquid_ prefix to internal polynomial functions, using
    common double-precision method for finding polynomial roots
• multichannel
  • firpfbch2: adding convenience methods to get object properties
• modem
  • modem: adding type extension for more consistency: modem -> modemcf,
    supporting backwards compatibility with API shim