Re: [LAD] [BrlCV] My attempt of linking Linux to Eurorack

> Mario Lang:
>

> #include <jack.hpp>
>
> #include <boost/accumulators/accumulators.hpp>
> #include <boost/accumulators/statistics.hpp>
>
> template<typename... Features>
> using AudioAccumulatorSet = boost::accumulators::accumulator_set<
> float, boost::accumulators::features<Features...>
> >;
>
> using Count = boost::accumulators::tag::count;
> using Max = boost::accumulators::tag::max;
> using Min = boost::accumulators::tag::min;
> using Mean = boost::accumulators::tag::mean;
> using Variance = boost::accumulators::tag::variance;
>
> class Statistics final : public JACK::Client {
> JACK::AudioIn In;
> AudioAccumulatorSet<Count, Max, Mean, Min, Variance> Accumulator;
>
> public:
> Statistics() : JACK::Client("Statistics"), In(createAudioIn("In")) {}
> int process(std::uint32_t FrameCount) override {
> for (auto &Value: In.buffer(FrameCount)) Accumulator(Value);
> return 0;
> }
> auto max() const { return boost::accumulators::max(Accumulator); }
> auto mean() const { return boost::accumulators::mean(Accumulator); }
> auto min() const { return boost::accumulators::min(Accumulator); }
> auto sampleCount() const { return boost::accumulators::count(Accumulator);
> }
> auto variance() const { return boost::accumulators::variance(Accumulator);
> }
> };
>
>
Nice code. But I wonder about one small thing related to C++.
Couldn't these max/mean/etc. methods in the Statististics class
be written shorter like this?:

  auto max() const { return Max(Accumulator); }
  auto mean() const { return Mean(Accumulator); }
  auto min() const { return Min(Accumulator); }
  auto sampleCount() const { return Count(Accumulator); }
  auto variance() const { return Variance(Accumulator); }

Sorry if it's a stupid question, but I haven't used "using" in C++ yet. :-)

Also thanks for demonstrating these things from boost.

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Received on Fri Jul 28 16:15:01 2017