Version 1.5.0

This release includes substantially improved testing coverage, deep copy() methods for nearly all objects, improved speed, and resolves a number of issues and pull requests.

• build
  • added support for PlatformIO for embeedded
    development (thanks, @jcw!)
  • incorporated recursive copy() methods to objects to facilitate c++ copy
    constructors for bindings; now all objects can be deep copied to a new
    object with their entire memory and state preserved
  • added convenience method to malloc and copy memory arrays
  • improved support for error codes across objects and methods
  • cleaned up spelling errors across project (thanks, @nowls!)
  • scrubbed function argument variable names to avoid underscore followed
    by a capital letter, causing trouble with pre-compiler processing
  • added basic test to check linking to installed library, incorporating
    into CI/CD pipelines
  • added more example programs
• autotest
  • increased coverage testing (81% across entire project)
  • added the ability to "hammer" a particular test by running repeatedly on
    incremental seeds to assess specific edge cases (e.g. with random data)
  • added timer to show execution time for each test and identify areas for
    speed improvements
  • added methods for testing spectral response of various fields
  • added special directory for storing output logs: autotest/logs/
• benchmark
  • replacing old C-based benchmark comparison with simpler python version
• dotprod
  • added support for AVX SIMD in vector dot products (thanks, @vankxr!)
• fft
  • adding macro to allow for aligned memory allocation if FFTW is used
    (thanks, @nowls!)
• filter
  • added new halfband filter design using Parks-McClellan algorithm and
    qs1dsearch method to provide as exact a specification as possible
  • added method to retrieve filter response from coefficients array
  • dds: adding methods to get/set scale
  • firhilb, iirhilb: added block processing method
  • msresamp, resamp: adding method to provide the exact number of output
    samples with provided input size
  • msresamp2, resamp2: using better halfband filter design for exact user
    specifications
  • resamp: adding methods to get/set scale, fixing filter bank resolution
    (was hard-coded, now respects user configuration)
• framing
  • framesync64: added methods to set callback and userdata (context)
    fields, adding support for exporting debugging files for post-analysis
    as well as python script for processing, adding better estimate of
    error vector magnitude
  • msource: added convenience method to recall number of samples generated
    by each source
  • ofdmflexframesync: added methods to set callback and userdata (context)
    fields
  • qpacketmodem: returning much better estimate of error vector magnitude
  • qsource: fixed issue with carrier frequency adjustment
• optim
  • added qs1dsearch object to perform quad-section 1-dimensional search:
    similar to bisection search, but to find potentially non-continuous
    minimum/maximum of function