Function testLimitRatio

tests/client_comp_test.cpp:184–214

High ratio (20:1) clamps near threshold.

// High ratio (20:1) clamps near threshold.
void testLimitRatio()
{
    ClientComp comp;
    comp.prepare(kSampleRate);
    comp.setEnabled(true);
    comp.setThresholdDb(-12.0f);
    comp.setRatio(20.0f);
    comp.setKneeDb(0.0f);
    comp.setMakeupDb(0.0f);
    comp.setAttackMs(50.0f);
    comp.setReleaseMs(500.0f);
    comp.setLimiterEnabled(false);

    const float amp = std::pow(10.0f, -3.0f / 20.0f);  // -3 dBFS peak
    const int warm = static_cast<int>(kSampleRate) * 3;
    auto warmBuf = makeTone(1000.0, warm, amp);
    processBlocks(comp, warmBuf.data(), warm);

    const int frames = static_cast<int>(kSampleRate);
    auto buf = makeTone(1000.0, frames, amp);
    processBlocks(comp, buf.data(), frames);

    const float measPeak = peakAbsStereo(buf.data(), frames);
    const float measDbfs = linToDb(measPeak);
    const float expected = -12.0f + 9.0f / 20.0f;
    const float errDb    = measDbfs - expected;
    report("20:1 ratio: -3 dBFS in -> near threshold out",
           std::fabs(errDb) < 1.5f,
           "measured=" + std::to_string(measDbfs) + " dBFS, expected="
               + std::to_string(expected));
}

// Makeup gain applied to below-threshold signal = clean linear boost.
void testMakeupGain()