Johannes Pohl 12389953c6 Enhance Spectrum Analyzer (#365) ...

* add cython method for abs2

* add arr2decibel method

* add timings

* add fft benchmark

* add live spectrogram test

* add test for spectrum analyzer

* tune thread count

* add spectrogram to spectrum dialog

* integrate waterfall

* fix unittest

* improve grid scene

* draw frequency marker in spectrum analyzer

* clear spectrogram on clear button + remove marker on leave

* eliminate spectrogram graphic view on close

* ensure spectrogram fits in view

* guard resize

* add test for clear button in spectrum dialog

2017-11-26 12:23:59 +01:00

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