mirror of
https://github.com/AndroidAudioMods/ViPERFX_RE.git
synced 2025-06-08 02:29:40 +08:00
112 lines
2.7 KiB
C++
112 lines
2.7 KiB
C++
#include <cstring>
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#include <cmath>
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#include "SoftwareLimiter.h"
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#ifndef uint
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#define uint unsigned int
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#endif
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SoftwareLimiter::SoftwareLimiter() {
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this->ready = false;
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this->unknown4 = 0;
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this->unknown2 = 1.0;
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this->gate = 0.999999;
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this->unknown3 = 1.0;
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this->unknown1 = 1.0;
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Reset();
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}
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float SoftwareLimiter::Process(float sample) {
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bool bVar1;
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uint uVar3;
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uint uVar4;
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int iVar5;
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uint uVar6;
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uint uVar8;
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float fVar9;
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float fVar10;
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float abs_sample;
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abs_sample = std::abs(sample);
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if (abs_sample < this->gate) {
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if (this->ready) goto LAB_0006d86c;
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uVar8 = this->unknown4;
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}
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else {
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if (!this->ready) {
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memset(this->arr512, 0, sizeof(this->arr512));
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this->ready = true;
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}
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LAB_0006d86c:
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uVar3 = 8;
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uVar8 = this->unknown4;
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uVar4 = uVar8;
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do {
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iVar5 = 2 << (uVar3 & 0xff);
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uVar6 = uVar4 ^ 1;
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this->arr512[512 + uVar4 - iVar5] = abs_sample;
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uVar4 = uVar4 / 2;
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if (abs_sample < this->arr512[512 + uVar6 - iVar5]) {
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abs_sample = this->arr512[512 + uVar6 - iVar5];
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}
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uVar3 = uVar3 - 1;
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} while (uVar3 != 0);
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if (this->gate < abs_sample) {
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bVar1 = this->ready;
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fVar10 = this->unknown1;
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uVar4 = (uVar8 + 1) % 256;
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this->arr256[uVar8] = sample;
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this->unknown4 = uVar4;
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if (bVar1) {
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fVar10 = this->gate / abs_sample;
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}
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abs_sample = this->arr256[uVar4];
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goto LAB_0006d8fc;
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}
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this->ready = false;
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}
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fVar10 = this->unknown1;
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this->arr256[uVar8] = sample;
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uVar8 = (uVar8 + 1) % 256;
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this->unknown4 = uVar8;
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abs_sample = this->arr256[uVar8];
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LAB_0006d8fc:
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fVar9 = this->unknown2 * 0.9999 + 0.0001;
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fVar10 = fVar10 * 0.0999 + this->unknown3 * 0.8999;
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bVar1 = fVar10 < fVar9;
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this->unknown3 = fVar10;
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if (bVar1) {
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fVar9 = fVar10;
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}
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if (bVar1) {
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this->unknown2 = fVar10;
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}
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if (!bVar1) {
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this->unknown2 = fVar9;
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}
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fVar9 = abs_sample * fVar9;
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fVar10 = std::abs(fVar9);
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if (this->gate <= fVar10) {
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fVar9 = this->gate / std::abs(abs_sample);
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}
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if (this->gate <= fVar10) {
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this->unknown2 = fVar9;
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fVar9 = abs_sample * fVar9;
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}
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return fVar9;
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}
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void SoftwareLimiter::Reset() {
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memset(this->arr256, 0, sizeof(this->arr256));
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memset(this->arr512, 0, sizeof(this->arr512));
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this->ready = false;
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this->unknown4 = 0;
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this->unknown2 = 1.0;
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this->unknown3 = 1.0;
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}
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void SoftwareLimiter::SetGate(float gate) {
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this->gate = gate;
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}
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