mirror of https://github.com/AxioDL/amuse.git
450 lines
14 KiB
C++
450 lines
14 KiB
C++
#include "amuse/EffectReverb.hpp"
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#include <algorithm>
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#include <cmath>
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#include "amuse/IBackendVoice.hpp"
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namespace amuse {
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/* clang-format off */
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/* Comb-filter delays */
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constexpr std::array<size_t, 3> CTapDelays{
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1789,
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1999,
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2333
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};
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/* All-pass-filter delays */
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constexpr std::array<size_t, 2> APTapDelays{
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433,
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149,
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};
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/* Per-channel low-pass delays (Hi-quality reverb only) */
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constexpr std::array<size_t, 8> LPTapDelays{
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47,
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73,
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67,
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57,
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43,
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57,
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83,
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73
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};
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/* clang-format on */
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void ReverbDelayLine::allocate(int32_t delay) {
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delay += 2;
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x8_length = delay;
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xc_inputs = std::make_unique<float[]>(delay);
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x10_lastInput = 0.f;
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setdelay(delay / 2);
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x0_inPoint = 0;
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x4_outPoint = 0;
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}
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void ReverbDelayLine::setdelay(int32_t delay) {
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x4_outPoint = x0_inPoint - delay;
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while (x4_outPoint < 0)
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x4_outPoint += x8_length;
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}
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EffectReverbStd::EffectReverbStd(float coloration, float mix, float time, float damping, float preDelay)
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: x140_x1c8_coloration(std::clamp(coloration, 0.f, 1.f))
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, x144_x1cc_mix(std::clamp(mix, 0.f, 1.f))
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, x148_x1d0_time(std::clamp(time, 0.01f, 10.f))
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, x14c_x1d4_damping(std::clamp(damping, 0.f, 1.f))
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, x150_x1d8_preDelay(std::clamp(preDelay, 0.f, 0.1f)) {}
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EffectReverbHi::EffectReverbHi(float coloration, float mix, float time, float damping, float preDelay, float crosstalk)
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: EffectReverbStd(coloration, mix, time, damping, preDelay), x1dc_crosstalk(std::clamp(crosstalk, 0.f, 1.0f)) {}
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template <typename T>
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EffectReverbStdImp<T>::EffectReverbStdImp(float coloration, float mix, float time, float damping, float preDelay,
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double sampleRate)
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: EffectReverbStd(coloration, mix, time, damping, preDelay) {
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_setup(sampleRate);
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}
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template <typename T>
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void EffectReverbStdImp<T>::_setup(double sampleRate) {
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m_sampleRate = sampleRate;
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_update();
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}
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template <typename T>
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void EffectReverbStdImp<T>::_update() {
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float timeSamples = x148_x1d0_time * m_sampleRate;
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double rateRatio = m_sampleRate / NativeSampleRate;
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for (size_t c = 0; c < NumChannels; ++c) {
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for (size_t t = 0; t < x78_C[c].size(); ++t) {
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ReverbDelayLine& combLine = x78_C[c][t];
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size_t tapDelay = CTapDelays[t] * rateRatio;
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combLine.allocate(tapDelay);
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combLine.setdelay(tapDelay);
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xf4_combCoef[c][t] = std::pow(10.f, tapDelay * -3.f / timeSamples);
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}
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for (size_t t = 0; t < x0_AP[c].size(); ++t) {
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ReverbDelayLine& allPassLine = x0_AP[c][t];
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size_t tapDelay = APTapDelays[t] * rateRatio;
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allPassLine.allocate(tapDelay);
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allPassLine.setdelay(tapDelay);
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}
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}
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xf0_allPassCoef = x140_x1c8_coloration;
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x118_level = x144_x1cc_mix;
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x11c_damping = x14c_x1d4_damping;
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if (x11c_damping < 0.05f)
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x11c_damping = 0.05f;
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x11c_damping = 1.f - (x11c_damping * 0.8f + 0.05);
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if (x150_x1d8_preDelay != 0.f) {
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x120_preDelayTime = m_sampleRate * x150_x1d8_preDelay;
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for (size_t i = 0; i < NumChannels; ++i) {
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x124_preDelayLine[i] = std::make_unique<float[]>(x120_preDelayTime);
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x130_preDelayPtr[i] = x124_preDelayLine[i].get();
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}
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} else {
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x120_preDelayTime = 0;
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for (auto& delayLine : x124_preDelayLine) {
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delayLine.reset();
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}
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x130_preDelayPtr.fill(nullptr);
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}
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m_dirty = false;
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}
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template <typename T>
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void EffectReverbStdImp<T>::applyEffect(T* audio, size_t frameCount, const ChannelMap& chanMap) {
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if (m_dirty)
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_update();
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const float dampWet = x118_level * 0.6f;
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const float dampDry = 0.6f - dampWet;
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for (size_t f = 0; f < frameCount; f += 160) {
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for (unsigned c = 0; c < chanMap.m_channelCount; ++c) {
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const auto& combCoefs = xf4_combCoef[c];
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float& lpLastOut = x10c_lpLastout[c];
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float* preDelayLine = x124_preDelayLine[c].get();
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float* preDelayPtr = x130_preDelayPtr[c];
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float* lastPreDelaySamp = &preDelayLine[x120_preDelayTime - 1];
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auto& linesC = x78_C[c];
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auto& linesAP = x0_AP[c];
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const int procSamples = std::min(size_t(160), frameCount - f);
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for (int s = 0; s < procSamples; ++s) {
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const float sample = audio[s * chanMap.m_channelCount + c];
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/* Pre-delay stage */
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float sample2 = sample;
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if (x120_preDelayTime != 0) {
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sample2 = *preDelayPtr;
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*preDelayPtr = sample;
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preDelayPtr += 1;
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if (preDelayPtr == lastPreDelaySamp)
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preDelayPtr = preDelayLine;
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}
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/* Comb filter stage */
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linesC[0].xc_inputs[linesC[0].x0_inPoint] = combCoefs[0] * linesC[0].x10_lastInput + sample2;
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linesC[0].x0_inPoint += 1;
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linesC[1].xc_inputs[linesC[1].x0_inPoint] = combCoefs[1] * linesC[1].x10_lastInput + sample2;
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linesC[1].x0_inPoint += 1;
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linesC[0].x10_lastInput = linesC[0].xc_inputs[linesC[0].x4_outPoint];
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linesC[0].x4_outPoint += 1;
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linesC[1].x10_lastInput = linesC[1].xc_inputs[linesC[1].x4_outPoint];
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linesC[1].x4_outPoint += 1;
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if (linesC[0].x0_inPoint == linesC[0].x8_length)
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linesC[0].x0_inPoint = 0;
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if (linesC[1].x0_inPoint == linesC[1].x8_length)
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linesC[1].x0_inPoint = 0;
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if (linesC[0].x4_outPoint == linesC[0].x8_length)
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linesC[0].x4_outPoint = 0;
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if (linesC[1].x4_outPoint == linesC[1].x8_length)
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linesC[1].x4_outPoint = 0;
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/* All-pass filter stage */
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linesAP[0].xc_inputs[linesAP[0].x0_inPoint] =
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xf0_allPassCoef * linesAP[0].x10_lastInput + linesC[0].x10_lastInput + linesC[1].x10_lastInput;
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const float lowPass =
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-(xf0_allPassCoef * linesAP[0].xc_inputs[linesAP[0].x0_inPoint] - linesAP[0].x10_lastInput);
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linesAP[0].x0_inPoint += 1;
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linesAP[0].x10_lastInput = linesAP[0].xc_inputs[linesAP[0].x4_outPoint];
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linesAP[0].x4_outPoint += 1;
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if (linesAP[0].x0_inPoint == linesAP[0].x8_length)
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linesAP[0].x0_inPoint = 0;
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if (linesAP[0].x4_outPoint == linesAP[0].x8_length)
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linesAP[0].x4_outPoint = 0;
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lpLastOut = x11c_damping * lpLastOut + lowPass * 0.3f;
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linesAP[1].xc_inputs[linesAP[1].x0_inPoint] = xf0_allPassCoef * linesAP[1].x10_lastInput + lpLastOut;
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const float allPass =
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-(xf0_allPassCoef * linesAP[1].xc_inputs[linesAP[1].x0_inPoint] - linesAP[1].x10_lastInput);
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linesAP[1].x0_inPoint += 1;
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linesAP[1].x10_lastInput = linesAP[1].xc_inputs[linesAP[1].x4_outPoint];
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linesAP[1].x4_outPoint += 1;
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if (linesAP[1].x0_inPoint == linesAP[1].x8_length)
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linesAP[1].x0_inPoint = 0;
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if (linesAP[1].x4_outPoint == linesAP[1].x8_length)
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linesAP[1].x4_outPoint = 0;
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/* Mix out */
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audio[s * chanMap.m_channelCount + c] = ClampFull<T>(dampWet * allPass + dampDry * sample);
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}
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x130_preDelayPtr[c] = preDelayPtr;
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}
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audio += chanMap.m_channelCount * 160;
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}
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}
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template <typename T>
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EffectReverbHiImp<T>::EffectReverbHiImp(float coloration, float mix, float time, float damping, float preDelay,
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float crosstalk, double sampleRate)
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: EffectReverbHi(coloration, mix, time, damping, preDelay, crosstalk) {
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_setup(sampleRate);
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}
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template <typename T>
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void EffectReverbHiImp<T>::_setup(double sampleRate) {
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m_sampleRate = sampleRate;
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_update();
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}
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template <typename T>
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void EffectReverbHiImp<T>::_update() {
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const float timeSamples = x148_x1d0_time * m_sampleRate;
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const double rateRatio = m_sampleRate / NativeSampleRate;
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for (size_t c = 0; c < NumChannels; ++c) {
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for (size_t t = 0; t < xb4_C[c].size(); ++t) {
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ReverbDelayLine& combLine = xb4_C[c][t];
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const size_t tapDelay = CTapDelays[t] * rateRatio;
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combLine.allocate(tapDelay);
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combLine.setdelay(tapDelay);
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x16c_combCoef[c][t] = std::pow(10.f, tapDelay * -3.f / timeSamples);
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}
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for (size_t t = 0; t < x0_AP[c].size(); ++t) {
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ReverbDelayLine& allPassLine = x0_AP[c][t];
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const size_t tapDelay = APTapDelays[t] * rateRatio;
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allPassLine.allocate(tapDelay);
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allPassLine.setdelay(tapDelay);
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}
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ReverbDelayLine& lpLine = x78_LP[c];
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const size_t tapDelay = LPTapDelays[c] * rateRatio;
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lpLine.allocate(tapDelay);
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lpLine.setdelay(tapDelay);
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}
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x168_allPassCoef = x140_x1c8_coloration;
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x19c_level = x144_x1cc_mix;
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x1a0_damping = x14c_x1d4_damping;
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if (x1a0_damping < 0.05f)
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x1a0_damping = 0.05f;
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x1a0_damping = 1.f - (x1a0_damping * 0.8f + 0.05);
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if (x150_x1d8_preDelay != 0.f) {
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x1a4_preDelayTime = m_sampleRate * x150_x1d8_preDelay;
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for (size_t i = 0; i < NumChannels; ++i) {
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x1ac_preDelayLine[i] = std::make_unique<float[]>(x1a4_preDelayTime);
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x1b8_preDelayPtr[i] = x1ac_preDelayLine[i].get();
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}
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} else {
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x1a4_preDelayTime = 0;
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for (auto& delayLine : x1ac_preDelayLine) {
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delayLine.reset();
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}
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x1b8_preDelayPtr.fill(nullptr);
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}
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x1a8_internalCrosstalk = x1dc_crosstalk;
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m_dirty = false;
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}
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template <typename T>
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void EffectReverbHiImp<T>::_handleReverb(T* audio, int c, int chanCount, int sampleCount) {
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const float dampWet = x19c_level * 0.6f;
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const float dampDry = 0.6f - dampWet;
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const auto& combCoefs = x16c_combCoef[c];
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float& lpLastOut = x190_lpLastout[c];
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float* preDelayLine = x1ac_preDelayLine[c].get();
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float* preDelayPtr = x1b8_preDelayPtr[c];
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float* lastPreDelaySamp = &preDelayLine[x1a4_preDelayTime - 1];
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auto& linesC = xb4_C[c];
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auto& linesAP = x0_AP[c];
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ReverbDelayLine& lineLP = x78_LP[c];
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const float allPassCoef = x168_allPassCoef;
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const float damping = x1a0_damping;
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const int32_t preDelayTime = x1a4_preDelayTime;
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for (int s = 0; s < sampleCount; ++s) {
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const float sample = audio[s * chanCount + c];
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/* Pre-delay stage */
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float sample2 = sample;
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if (preDelayTime != 0) {
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sample2 = *preDelayPtr;
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*preDelayPtr = sample;
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preDelayPtr += 1;
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if (preDelayPtr == lastPreDelaySamp)
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preDelayPtr = preDelayLine;
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}
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/* Comb filter stage */
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linesC[0].xc_inputs[linesC[0].x0_inPoint] = combCoefs[0] * linesC[0].x10_lastInput + sample2;
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linesC[0].x0_inPoint += 1;
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linesC[1].xc_inputs[linesC[1].x0_inPoint] = combCoefs[1] * linesC[1].x10_lastInput + sample2;
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linesC[1].x0_inPoint += 1;
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linesC[2].xc_inputs[linesC[2].x0_inPoint] = combCoefs[2] * linesC[2].x10_lastInput + sample2;
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linesC[2].x0_inPoint += 1;
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linesC[0].x10_lastInput = linesC[0].xc_inputs[linesC[0].x4_outPoint];
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linesC[0].x4_outPoint += 1;
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linesC[1].x10_lastInput = linesC[1].xc_inputs[linesC[1].x4_outPoint];
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linesC[1].x4_outPoint += 1;
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linesC[2].x10_lastInput = linesC[2].xc_inputs[linesC[2].x4_outPoint];
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linesC[2].x4_outPoint += 1;
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if (linesC[0].x0_inPoint == linesC[0].x8_length)
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linesC[0].x0_inPoint = 0;
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if (linesC[1].x0_inPoint == linesC[1].x8_length)
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linesC[1].x0_inPoint = 0;
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if (linesC[2].x0_inPoint == linesC[2].x8_length)
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linesC[2].x0_inPoint = 0;
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if (linesC[0].x4_outPoint == linesC[0].x8_length)
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linesC[0].x4_outPoint = 0;
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if (linesC[1].x4_outPoint == linesC[1].x8_length)
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linesC[1].x4_outPoint = 0;
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if (linesC[2].x4_outPoint == linesC[2].x8_length)
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linesC[2].x4_outPoint = 0;
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/* All-pass filter stage */
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linesAP[0].xc_inputs[linesAP[0].x0_inPoint] = allPassCoef * linesAP[0].x10_lastInput + linesC[0].x10_lastInput +
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linesC[1].x10_lastInput + linesC[2].x10_lastInput;
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linesAP[1].xc_inputs[linesAP[1].x0_inPoint] =
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allPassCoef * linesAP[1].x10_lastInput -
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(allPassCoef * linesAP[0].xc_inputs[linesAP[0].x0_inPoint] - linesAP[0].x10_lastInput);
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const float lowPass = -(allPassCoef * linesAP[1].xc_inputs[linesAP[1].x0_inPoint] - linesAP[1].x10_lastInput);
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linesAP[0].x0_inPoint += 1;
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linesAP[1].x0_inPoint += 1;
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if (linesAP[0].x0_inPoint == linesAP[0].x8_length)
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linesAP[0].x0_inPoint = 0;
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if (linesAP[1].x0_inPoint == linesAP[1].x8_length)
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linesAP[1].x0_inPoint = 0;
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linesAP[0].x10_lastInput = linesAP[0].xc_inputs[linesAP[0].x4_outPoint];
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linesAP[0].x4_outPoint += 1;
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linesAP[1].x10_lastInput = linesAP[1].xc_inputs[linesAP[1].x4_outPoint];
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linesAP[1].x4_outPoint += 1;
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if (linesAP[0].x4_outPoint == linesAP[0].x8_length)
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linesAP[0].x4_outPoint = 0;
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if (linesAP[1].x4_outPoint == linesAP[1].x8_length)
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linesAP[1].x4_outPoint = 0;
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lpLastOut = damping * lpLastOut + lowPass * 0.3f;
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lineLP.xc_inputs[lineLP.x0_inPoint] = allPassCoef * lineLP.x10_lastInput + lpLastOut;
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const float allPass = -(allPassCoef * lineLP.xc_inputs[lineLP.x0_inPoint] - lineLP.x10_lastInput);
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lineLP.x0_inPoint += 1;
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lineLP.x10_lastInput = lineLP.xc_inputs[lineLP.x4_outPoint];
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lineLP.x4_outPoint += 1;
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if (lineLP.x0_inPoint == lineLP.x8_length)
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lineLP.x0_inPoint = 0;
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if (lineLP.x4_outPoint == lineLP.x8_length)
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lineLP.x4_outPoint = 0;
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/* Mix out */
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audio[s * chanCount + c] = ClampFull<T>(dampWet * allPass + dampDry * sample);
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}
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x1b8_preDelayPtr[c] = preDelayPtr;
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}
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template <typename T>
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void EffectReverbHiImp<T>::_doCrosstalk(T* audio, float wet, float dry, int chanCount, int sampleCount) {
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for (int i = 0; i < sampleCount; ++i) {
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T* base = &audio[chanCount * i];
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float allWet = 0;
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for (int c = 0; c < chanCount; ++c) {
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allWet += base[c] * wet;
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base[c] *= dry;
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}
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for (int c = 0; c < chanCount; ++c)
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base[c] = ClampFull<T>(base[c] + allWet);
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}
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}
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template <typename T>
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void EffectReverbHiImp<T>::applyEffect(T* audio, size_t frameCount, const ChannelMap& chanMap) {
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if (m_dirty)
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_update();
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for (size_t f = 0; f < frameCount; f += 160) {
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size_t blockSamples = std::min(size_t(160), frameCount - f);
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for (unsigned i = 0; i < chanMap.m_channelCount; ++i) {
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if (i == 0 && x1a8_internalCrosstalk != 0.f) {
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float crossWet = x1a8_internalCrosstalk * 0.5;
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_doCrosstalk(audio, crossWet, 1.f - crossWet, chanMap.m_channelCount, blockSamples);
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}
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_handleReverb(audio, i, chanMap.m_channelCount, blockSamples);
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}
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audio += chanMap.m_channelCount * 160;
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}
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}
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template class EffectReverbStdImp<int16_t>;
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template class EffectReverbStdImp<int32_t>;
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template class EffectReverbStdImp<float>;
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template class EffectReverbHiImp<int16_t>;
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template class EffectReverbHiImp<int32_t>;
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template class EffectReverbHiImp<float>;
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} // namespace amuse
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