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Add a reference follower to the benchmark

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This commit is contained in:
Jean Pierre Cimalando 2020-08-27 09:05:05 +02:00
parent a5c72375a9
commit 732222b8d3
1 changed files with 65 additions and 0 deletions
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65
benchmarks/BM_powerFollower.cpp
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@ -33,6 +33,10 @@ public:
follower_.setSampleRate(sfz::config::defaultSampleRate);
follower_.setSamplesPerBlock(blockSize);
follower_.clear();
//
refFollower_.init(sfz::config::defaultSampleRate);
refFollower_.clear();
}
void TearDown(const ::benchmark::State& /* state */)
@ -42,10 +46,70 @@ public:
static constexpr size_t numFrames = 65536;
sfz::PowerFollower follower_;
sfz::AudioBuffer<float> inputSignal_;
//
struct ReferenceFollower {
/*
import("stdfaust.lib");
process = (_, _) : + : an.amp_follower_ud(att, rel) with { att = 5e-3; rel = 200e-3; };
*/
void init(float sampleRate)
{
fConst0 = std::min<float>(192000.0f, std::max<float>(1.0f, float(sampleRate)));
fConst1 = std::exp((0.0f - (200.0f / fConst0)));
fConst2 = (1.0f - fConst1);
fConst3 = std::exp((0.0f - (5.0f / fConst0)));
fConst4 = (1.0f - fConst3);
}
void clear()
{
for (int l0 = 0; (l0 < 2); l0 = (l0 + 1)) {
fRec1[l0] = 0.0f;
}
for (int l1 = 0; (l1 < 2); l1 = (l1 + 1)) {
fRec0[l1] = 0.0f;
}
}
float process(float input0, float input1)
{
float fTemp0 = std::fabs((float(input0) + float(input1)));
fRec1[0] = std::max<float>(fTemp0, ((fConst3 * fRec1[1]) + (fConst4 * fTemp0)));
fRec0[0] = ((fConst1 * fRec0[1]) + (fConst2 * fRec1[0]));
float output = fRec0[0];
fRec1[1] = fRec1[0];
fRec0[1] = fRec0[0];
return output;
}
float fConst0;
float fConst1;
float fConst2;
float fConst3;
float fConst4;
float fRec1[2];
float fRec0[2];
};
ReferenceFollower refFollower_;
};
constexpr size_t PowerFollowerFixture::numFrames;
BENCHMARK_DEFINE_F(PowerFollowerFixture, ReferenceFollower) (benchmark::State& state)
{
sfz::AudioSpan<float> inputSignal(inputSignal_);
auto input0 = inputSignal.getConstSpan(0);
auto input1 = inputSignal.getConstSpan(1);
for (auto _ : state) {
auto& follower = refFollower_;
float output = 0;
for (size_t i = 0, n = inputSignal.getNumFrames(); i < n; ++i)
output = follower.process(input0[i], input1[i]);
benchmark::DoNotOptimize(output);
}
}
BENCHMARK_DEFINE_F(PowerFollowerFixture, Follower) (benchmark::State& state)
{
sfz::AudioSpan<float> inputSignal(inputSignal_);
@ -57,4 +121,5 @@ BENCHMARK_DEFINE_F(PowerFollowerFixture, Follower) (benchmark::State& state)
}
}
BENCHMARK_REGISTER_F(PowerFollowerFixture, ReferenceFollower)->Range(1, 1);
BENCHMARK_REGISTER_F(PowerFollowerFixture, Follower)->RangeMultiplier(2)->Range(1 << 5, 1 << 12);