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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
Audacity: A Digital Audio Editor
CompressorProcessorTests.cpp
Matthieu Hodgkinson
**********************************************************************/
#pragma once
#include "CompressorProcessor.h"
#include <catch2/catch.hpp>
TEST_CASE("GetMaxCompressionDb", "simple test")
{
DynamicRangeProcessorSettings settings { LimiterSettings {} };
settings.inCompressionThreshDb = -20;
settings.outCompressionThreshDb = -10;
settings.kneeWidthDb = 0;
// Infinite ratio -> max compression simply is the input compression
// threshold.
settings.compressionRatio = std::numeric_limits<float>::infinity();
REQUIRE(CompressorProcessor::GetMaxCompressionDb(settings) == Approx(20));
// 2:1 ratio -> half the input compression threshold.
settings.compressionRatio = 2;
REQUIRE(CompressorProcessor::GetMaxCompressionDb(settings) == Approx(10));
// So long as the knee half width is less than the input compression
// threshold, it shouldn't change the result.
settings.kneeWidthDb = 40;
REQUIRE(CompressorProcessor::GetMaxCompressionDb(settings) == Approx(10));
// But if it's greater, it should.
settings.kneeWidthDb = 60;
REQUIRE(CompressorProcessor::GetMaxCompressionDb(settings) > 10);
}
TEST_CASE("CompressorProcessor", "smoke test")
{
CompressorSettings settings;
settings.lookaheadMs = 5;
CompressorProcessor sut { settings };
constexpr auto sampleRate = 44100;
constexpr auto numChannels = 2;
constexpr auto blockSize = 44100;
constexpr auto signalSize = 2 * blockSize;
sut.Init(sampleRate, numChannels, blockSize);
std::vector<std::vector<float>> buffer(numChannels);
std::vector<float*> pointers(numChannels);
for (auto i = 0; i < numChannels; ++i)
{
auto& in = buffer[i];
in.resize(signalSize);
std::fill(in.begin(), in.begin() + signalSize / 2, 0.0f);
std::fill(in.begin() + signalSize / 2, in.end(), 1.0f);
}
auto progress = 0;
while (progress < signalSize)
{
const auto remaining = signalSize - progress;
const auto toProcess = std::min(remaining, blockSize);
std::transform(
buffer.begin(), buffer.end(), pointers.begin(),
[progress](std::vector<float>& v) { return v.data() + progress; });
const auto p = pointers.data();
sut.Process(p, p, toProcess);
progress += toProcess;
}
}
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