Update

CMakeLists.txt

@@ -50,6 +50,7 @@ set(FILES
         src/cpp/viper/utils/Crossfeed.cpp
         src/cpp/viper/utils/DepthSurround.cpp
         src/cpp/viper/utils/DynamicBass.cpp
+        src/cpp/viper/utils/FIR.cpp
         src/cpp/viper/utils/FixedBiquad.cpp
         src/cpp/viper/utils/Harmonic.cpp
         src/cpp/viper/utils/HiFi.cpp
@@ -62,6 +63,8 @@ set(FILES
         src/cpp/viper/utils/PassFilter.cpp
         src/cpp/viper/utils/PConvSingle_F32.cpp
         src/cpp/viper/utils/PolesFilter.cpp
+        src/cpp/viper/utils/Polyphase.cpp
+        src/cpp/viper/utils/Stereo3DSurround.cpp
         src/cpp/viper/utils/Subwoofer.cpp
         src/cpp/viper/utils/TimeConstDelay.cpp
         src/cpp/viper/utils/WaveBuffer_I32.cpp)

src/cpp/viper/ViPER.cpp

@@ -87,7 +87,7 @@ ViPER::ViPER() {
     this->tubeSimulator->Reset();
 
     this->analogX = new AnalogX();
-    this->analogX->enabled = false; //SetEnable(false);
+//    this->analogX->SetEnable(false);
     this->analogX->SetSamplingRate(this->sampleRate);
     this->analogX->SetProcessingModel(0);
     this->analogX->Reset();
@@ -104,10 +104,10 @@ ViPER::ViPER() {
 
     this->fetcomp_enabled = false;
     this->init_ok = true;
-    this->scale_frames_if_not_1point0 = 1.0;
-    this->pan_frames_if_less_than_1point0 = 1.0;
+    this->frame_scale = 1.0;
+    this->left_pan = 1.0;
     this->process_time_ms = 0;
-    this->pan_frames_if_less_than_1point0_2 = 1.0;
+    this->right_pan = 1.0;
     this->enabled = false;
     this->force_enabled = false;
     this->update_status = false;
@@ -171,7 +171,7 @@ ViPER::~ViPER() {
     delete this->speakerCorrection;
     this->speakerCorrection = nullptr;
 
-    for (auto &softwareLimiter: softwareLimiters) {
+    for (auto &softwareLimiter: this->softwareLimiters) {
         delete softwareLimiter;
         softwareLimiter = nullptr;
     }
@@ -322,7 +322,7 @@ void ViPER::processBuffer(float *buffer, int frameSize) {
         this->process_time_ms = time.tv_sec * 1000 + time.tv_usec / 1000;
     }
 
-    int ret;
+    uint32_t ret;
 
     // if convolver is enabled
     ret = this->waveBuffer->PushSamples(buffer, frameSize);
@@ -366,11 +366,11 @@ void ViPER::processBuffer(float *buffer, int frameSize) {
         this->analogX->Process(pAdaptiveBuffer, ret);
     }
 
-    if (this->scale_frames_if_not_1point0 != 1.0) {
-        this->adaptiveBuffer->ScaleFrames(this->scale_frames_if_not_1point0);
+    if (this->frame_scale != 1.0) {
+        this->adaptiveBuffer->ScaleFrames(this->frame_scale);
     }
-    if (this->pan_frames_if_less_than_1point0 < 1.0 || this->pan_frames_if_less_than_1point0_2 < 1.0) {
-        this->adaptiveBuffer->PanFrames(this->pan_frames_if_less_than_1point0, this->pan_frames_if_less_than_1point0_2);
+    if (this->left_pan < 1.0 || this->right_pan < 1.0) {
+        this->adaptiveBuffer->PanFrames(this->left_pan, this->right_pan);
     }
 
     if (ret << 1 != 0) {

src/cpp/viper/ViPER.h

@@ -73,7 +73,7 @@ public:
     SpeakerCorrection *speakerCorrection;
     SoftwareLimiter *softwareLimiters[2];
 
-    float scale_frames_if_not_1point0;
-    float pan_frames_if_less_than_1point0;
-    float pan_frames_if_less_than_1point0_2;
+    float frame_scale;
+    float left_pan;
+    float right_pan;
 };

src/cpp/viper/effects/AnalogX.cpp

@@ -7,12 +7,12 @@ static float ANALOGX_HARMONICS[10] = {
         0.02f,
         0.0001f,
         0.001f,
-        0.f,
-        0.f,
-        0.f,
-        0.f,
-        0.f,
-        0.f
+        0.0f,
+        0.0f,
+        0.0f,
+        0.0f,
+        0.0f,
+        0.0f
 };
 
 AnalogX::AnalogX() {

src/cpp/viper/effects/AnalogX.h

@@ -14,6 +14,7 @@ public:
     void SetProcessingModel(int processingModel);
     void SetSamplingRate(uint32_t samplingRate);
 
+private:
     MultiBiquad highpass[2];
     Harmonic harmonic[2];
     MultiBiquad lowpass[2];

src/cpp/viper/effects/ColorfulMusic.cpp

@@ -1,7 +1,12 @@
 #include "ColorfulMusic.h"
+#include "../constants.h"
 
 ColorfulMusic::ColorfulMusic() {
-
+    this->samplingRate = DEFAULT_SAMPLERATE;
+    this->enabled = false;
+    this->stereo3DSurround->SetStereoWiden(0.0f);
+    this->depthSurround->SetSamplingRate(this->samplingRate);
+    this->depthSurround->SetStrength(0);
 }
 
 ColorfulMusic::~ColorfulMusic() {
@@ -9,29 +14,42 @@ ColorfulMusic::~ColorfulMusic() {
 }
 
 void ColorfulMusic::Process(float *samples, uint32_t size) {
+    if (!this->enabled) {
+        return;
+    }
 
+    this->depthSurround->Process(samples, size);
+    this->stereo3DSurround->Process(samples, size);
 }
 
 void ColorfulMusic::Reset() {
-
+    this->depthSurround->SetSamplingRate(this->samplingRate);
 }
 
-void ColorfulMusic::SetDepthValue() {
-
+void ColorfulMusic::SetDepthValue(short depthValue) {
+    this->depthSurround->SetStrength(depthValue);
 }
 
 void ColorfulMusic::SetEnable(bool enable) {
-
+    if (this->enabled != enable) {
+        this->enabled = enable;
+        if (enable) {
+            Reset();
+        }
+    }
 }
 
-void ColorfulMusic::SetMidImageValue() {
-
+void ColorfulMusic::SetMidImageValue(float midImageValue) {
+    this->stereo3DSurround->SetMiddleImage(midImageValue);
 }
 
 void ColorfulMusic::SetSamplingRate(uint32_t samplingRate) {
-
+    if (this->samplingRate != samplingRate) {
+        this->samplingRate = samplingRate;
+        this->depthSurround->SetSamplingRate(this->samplingRate);
+    }
 }
 
-void ColorfulMusic::SetWidenValue() {
-
+void ColorfulMusic::SetWidenValue(float widenValue) {
+    this->stereo3DSurround->SetStereoWiden(widenValue);
 }

src/cpp/viper/effects/ColorfulMusic.h

@@ -1,6 +1,8 @@
 #pragma once
 
 #include <cstdint>
+#include "../utils/Stereo3DSurround.h"
+#include "../utils/DepthSurround.h"
 
 class ColorfulMusic {
 public:
@@ -9,11 +11,18 @@ public:
 
     void Process(float *samples, uint32_t size);
     void Reset();
-    void SetDepthValue();
+    void SetDepthValue(short depthValue);
     void SetEnable(bool enable);
-    void SetMidImageValue();
+    void SetMidImageValue(float midImageValue);
     void SetSamplingRate(uint32_t samplingRate);
-    void SetWidenValue();
+    void SetWidenValue(float widenValue);
+
+private:
+    Stereo3DSurround *stereo3DSurround;
+    DepthSurround *depthSurround;
+    uint32_t samplingRate;
+    bool enabled;
+
 };
 
 

src/cpp/viper/effects/Cure.cpp

@@ -26,8 +26,12 @@ void Cure::Reset() {
 }
 
 void Cure::SetEnable(bool enabled) {
-    Reset();
+    if (this->enabled != enabled) {
         this->enabled = enabled;
+        if (enabled) {
+            Reset();
+        }
+    }
 }
 
 void Cure::SetSamplingRate(uint32_t samplerate) {
@@ -53,7 +57,6 @@ preset_t Cure::GetPreset() {
 
 void Cure::SetCutoff(uint16_t cutoff) {
     this->crossfeed.SetCutoff(cutoff);
-
 }
 
 void Cure::SetFeedback(float feedback) {

src/cpp/viper/effects/DiffSurround.cpp

@@ -1,22 +1,21 @@
-//
-// Created by mart on 7/31/21.
-//
-
 #include <cstring>
 #include "DiffSurround.h"
 #include "../constants.h"
 
 DiffSurround::DiffSurround() {
     this->samplerate = DEFAULT_SAMPLERATE;
-    this->delayTime = 0.f;
+    this->delayTime = 0.0f;
     this->enabled = false;
-    this->buffers[0] = new WaveBuffer_I32(1, 0x1000);
-    this->buffers[1] = new WaveBuffer_I32(1, 0x1000);
+    for (auto &buffer : this->buffers) {
+        buffer = new WaveBuffer_I32(1, 0x1000);
+    }
 }
 
 DiffSurround::~DiffSurround() {
-    delete this->buffers[0];
-    delete this->buffers[1];
+    for (auto &buffer : this->buffers) {
+        delete buffer;
+        buffer = nullptr;
+    }
 }
 
 void DiffSurround::Process(float *samples, uint32_t size) {
@@ -44,25 +43,32 @@ void DiffSurround::Process(float *samples, uint32_t size) {
 }
 
 void DiffSurround::Reset() {
-    this->buffers[0]->Reset();
-    this->buffers[1]->Reset();
+    for (auto &buffer : this->buffers) {
+        buffer->Reset();
+    }
 
-    this->buffers[1]->PushZeros((uint32_t) (this->delayTime / 1000.f * (float) this->samplerate));
+    this->buffers[1]->PushZeros((uint32_t) (this->delayTime / 1000.0f * (float) this->samplerate));
 }
 
-void DiffSurround::SetDelayTime(float value) {
-    this->delayTime = value;
-    Reset();
+void DiffSurround::SetDelayTime(float delayTime) {
+    if (this->delayTime != delayTime) {
+        this->delayTime = delayTime;
+        this->Reset();
+    }
 }
 
 void DiffSurround::SetEnable(bool enabled) {
+    if (this->enabled != enabled) {
         this->enabled = enabled;
-    if (this->enabled) {
+        if (enabled) {
             Reset();
         }
+    }
 }
 
 void DiffSurround::SetSamplingRate(uint32_t samplerate) {
+    if (this->samplerate != samplerate) {
         this->samplerate = samplerate;
-    Reset();
+        this->Reset();
+    }
 }

src/cpp/viper/effects/DiffSurround.h

@@ -10,7 +10,7 @@ public:
 
     void Process(float *samples, uint32_t size);
     void Reset();
-    void SetDelayTime(float value);
+    void SetDelayTime(float delayTime);
     void SetEnable(bool enabled);
     void SetSamplingRate(uint32_t samplerate);
 

src/cpp/viper/effects/DynamicSystem.cpp

@@ -28,7 +28,12 @@ void DynamicSystem::SetBassGain(float gain) {
 }
 
 void DynamicSystem::SetEnable(bool enable) {
+    if (this->enabled != enable) {
         this->enabled = enable;
+        if (enable) {
+            Reset();
+        }
+    }
 }
 
 void DynamicSystem::SetSideGain(float gainX, float gainY) {
@@ -44,8 +49,10 @@ void DynamicSystem::SetYCoeffs(uint32_t low, uint32_t high) {
 }
 
 void DynamicSystem::SetSamplingRate(uint32_t samplerate) {
+    if (this->samplerate != samplerate) {
         this->samplerate = samplerate;
         this->bass.SetSamplingRate(samplerate);
+    }
 }
 
 DynamicSystem::~DynamicSystem() {

src/cpp/viper/effects/ViPERBass.cpp

@@ -1,3 +1,4 @@
+#include <cmath>
 #include "ViPERBass.h"
 
 ViPERBass::ViPERBass() {
@@ -13,18 +14,29 @@ void ViPERBass::Process(float *samples, uint32_t size) {
 }
 
 void ViPERBass::Reset() {
-
+    this->polyphase->SetSamplingRate(this->samplingRate);
+    this->polyphase->Reset();
+    this->waveBuffer->Reset();
+    this->waveBuffer->PushZeros(this->polyphase->GetLatency());
+    this->subwoofer->SetBassGain(this->samplingRate, this->bassFactor * 2.5f);
+    this->fixedBiquad->SetLowPassParameter(this->speaker, this->samplingRate, 0.53);
+    this->unknown1 = 0.0f;
 }
 
-void ViPERBass::SetBassFactor() {
+void ViPERBass::SetBassFactor(float bassFactor) {
+    if (abs(this->bassFactor - bassFactor) <= 0.01) {
+        return;
+    }
 
+    this->bassFactor = bassFactor;
+    this->subwoofer->SetBassGain(this->samplingRate, bassFactor * 2.5f);
 }
 
 void ViPERBass::SetEnable(bool enable) {
 
 }
 
-void ViPERBass::SetProcessMode() {
+void ViPERBass::SetProcessMode(int processMode) {
 
 }
 
@@ -32,6 +44,10 @@ void ViPERBass::SetSamplingRate(uint32_t samplingRate) {
 
 }
 
-void ViPERBass::SetSpeaker() {
+void ViPERBass::SetSpeaker(float speaker) {
+    if (this->speaker != speaker) {
+        this->speaker = speaker;
+        Reset();
+    }
 
 }

src/cpp/viper/effects/ViPERBass.h

@@ -1,6 +1,10 @@
 #pragma once
 
 #include <cstdint>
+#include "../utils/FixedBiquad.h"
+#include "../utils/Subwoofer.h"
+#include "../utils/WaveBuffer_I32.h"
+#include "../utils/Polyphase.h"
 
 class ViPERBass {
 public:
@@ -9,11 +13,24 @@ public:
 
     void Process(float *samples, uint32_t size);
     void Reset();
-    void SetBassFactor();
+    void SetBassFactor(float bassFactor);
     void SetEnable(bool enable);
-    void SetProcessMode();
+    void SetProcessMode(int processMode);
     void SetSamplingRate(uint32_t samplingRate);
-    void SetSpeaker();
+    void SetSpeaker(float speaker);
+
+private:
+    Polyphase *polyphase;
+    FixedBiquad *fixedBiquad;
+    Subwoofer *subwoofer;
+    WaveBuffer_I32 *waveBuffer;
+    bool enable;
+    bool initOk;
+    int processMode;
+    uint32_t samplingRate;
+    float unknown1;
+    float speaker;
+    float bassFactor;
 };
 
 

src/cpp/viper/effects/ViPERClarity.cpp

@@ -1,7 +1,3 @@
-//
-// Created by mart on 7/31/21.
-//
-
 #include "ViPERClarity.h"
 #include "../constants.h"
 

src/cpp/viper/utils/AdaptiveBuffer.cpp

@@ -21,19 +21,19 @@ void AdaptiveBuffer::FlushBuffer() {
     this->offset = 0;
 }
 
-uint32_t AdaptiveBuffer::GetBufferLength() {
+uint32_t AdaptiveBuffer::GetBufferLength() const {
     return this->length;
 }
 
-uint32_t AdaptiveBuffer::GetBufferOffset() {
+uint32_t AdaptiveBuffer::GetBufferOffset() const {
     return this->offset;
 }
 
-float *AdaptiveBuffer::GetBufferPointer() {
+float *AdaptiveBuffer::GetBufferPointer() const {
     return this->buffer;
 }
 
-uint32_t AdaptiveBuffer::GetChannels() {
+uint32_t AdaptiveBuffer::GetChannels() const {
     return this->channels;
 }
 
@@ -58,14 +58,14 @@ int AdaptiveBuffer::PopFrames(float *frames, uint32_t length) {
         memcpy(frames, this->buffer, length * this->channels * sizeof(*frames));
         this->offset = this->offset - length;
         if (this->offset != 0) {
-            memmove(this->buffer, &this->buffer[length * this->channels], this->offset * this->channels * sizeof(*this->buffer));
+            memmove(this->buffer, &this->buffer[length * this->channels], this->offset * this->channels * sizeof(float));
         }
     }
 
     return 1;
 }
 
-int AdaptiveBuffer::PushFrames(float *frames, uint32_t length) {
+int AdaptiveBuffer::PushFrames(const float *frames, uint32_t length) {
     if (this->buffer == nullptr) {
         return 0;
     }
@@ -73,13 +73,13 @@ int AdaptiveBuffer::PushFrames(float *frames, uint32_t length) {
     if (length != 0) {
         if (this->offset + length > this->length) {
             auto tmp = new float[(this->offset + length) * this->channels];
-            memcpy(tmp, this->buffer, this->offset * this->channels * sizeof(*this->buffer));
+            memcpy(tmp, this->buffer, this->offset * this->channels * sizeof(float));
             delete this->buffer;
             this->buffer = tmp;
             this->length = this->offset + length;
         }
 
-        memcpy(&this->buffer[this->offset * this->channels], frames, length * this->channels * sizeof(*frames));
+        memcpy(&this->buffer[this->offset * this->channels], frames, length * this->channels * sizeof(float));
         this->offset = this->offset + length;
     }
 
@@ -93,13 +93,13 @@ int AdaptiveBuffer::PushZero(uint32_t length) {
 
     if (this->offset + length > this->length) {
         auto tmp = new float[(this->offset + length) * this->channels];
-        memcpy(tmp, this->buffer, this->offset * this->channels * sizeof(*this->buffer));
+        memcpy(tmp, this->buffer, this->offset * this->channels * sizeof(float));
         delete this->buffer;
         this->buffer = tmp;
         this->length = this->offset + length;
     }
 
-    memset(&this->buffer[this->offset * this->channels], 0, length * this->channels * sizeof(*this->buffer));
+    memset(&this->buffer[this->offset * this->channels], 0, length * this->channels * sizeof(float));
     this->offset = this->offset + length;
 
     return 1;

src/cpp/viper/utils/AdaptiveBuffer.h

@@ -8,13 +8,13 @@ public:
     ~AdaptiveBuffer();
 
     void FlushBuffer();
-    uint32_t GetBufferLength();
-    uint32_t GetBufferOffset();
-    float *GetBufferPointer();
-    uint32_t GetChannels();
+    uint32_t GetBufferLength() const;
+    uint32_t GetBufferOffset() const;
+    float *GetBufferPointer() const;
+    uint32_t GetChannels() const;
     void PanFrames(float left, float right);
     int PopFrames(float *frames, uint32_t length);
-    int PushFrames(float *frames, uint32_t length);
+    int PushFrames(const float *frames, uint32_t length);
     int PushZero(uint32_t length);
     void ScaleFrames(float scale);
     void SetBufferOffset(uint32_t offset);

src/cpp/viper/utils/CAllpassFilter.cpp

@@ -1,9 +1,5 @@
-//
-// Created by mart on 7/26/21.
-//
-
-#include <cstring>
 #include "CAllpassFilter.h"
+#include <cstring>
 
 CAllpassFilter::CAllpassFilter() {
     this->buffer = nullptr;
@@ -12,6 +8,10 @@ CAllpassFilter::CAllpassFilter() {
     this->feedback = 0;
 }
 
+float CAllpassFilter::GetFeedback() {
+    return this->feedback;
+}
+
 void CAllpassFilter::Mute() {
     memset(this->buffer, 0, this->bufsize * sizeof(float));
 }
@@ -26,10 +26,6 @@ float CAllpassFilter::Process(float sample) {
     return outSample - sample;
 }
 
-float CAllpassFilter::GetFeedback() {
-    return this->feedback;
-}
-
 void CAllpassFilter::SetBuffer(float *buffer, uint32_t size) {
     this->buffer = buffer;
     this->bufsize = size;

src/cpp/viper/utils/CAllpassFilter.h

@@ -1,7 +1,3 @@
-//
-// Created by mart on 7/26/21.
-//
-
 #pragma once
 
 #include <cstdint>
@@ -10,16 +6,13 @@ class CAllpassFilter {
 public:
     CAllpassFilter();
 
-    void Mute();
-
-    float Process(float sample);
-
     float GetFeedback();
-
+    void Mute();
+    float Process(float sample);
     void SetBuffer(float *buffer, uint32_t size);
-
     void SetFeedback(float feedback);
 
+private:
     float *buffer;
     uint32_t bufidx;
     uint32_t bufsize;

src/cpp/viper/utils/CCombFilter.cpp

@@ -1,9 +1,5 @@
-//
-// Created by mart on 7/27/21.
-//
-
-#include <cstring>
 #include "CCombFilter.h"
+#include <cstring>
 
 CCombFilter::CCombFilter() {
     this->buffer = nullptr;
@@ -15,9 +11,21 @@ CCombFilter::CCombFilter() {
     this->damp2 = 0;
 }
 
+float CCombFilter::GetDamp() {
+    return this->damp;
+}
+
+float CCombFilter::GetFeedback() {
+    return this->feedback;
+}
+
+void CCombFilter::Mute() {
+    memset(this->buffer, 0, this->size * sizeof(float));
+}
+
 float CCombFilter::Process(float sample) {
     float output = this->buffer[this->bufidx];
-    this->filterstore = output * this->damp2 + this->filterstore * this->damp;;
+    this->filterstore = output * this->damp2 + this->filterstore * this->damp;
     this->buffer[this->bufidx] = sample + this->filterstore * this->feedback;
     this->bufidx++;
     if (this->bufidx >= this->size) {
@@ -26,16 +34,9 @@ float CCombFilter::Process(float sample) {
     return output;
 }
 
-void CCombFilter::Mute() {
-    memset(this->buffer, 0, this->size * sizeof(float));
-}
-
-float CCombFilter::GetDamp() {
-    return this->damp;
-}
-
-float CCombFilter::GetFeedback() {
-    return this->feedback;
+void CCombFilter::SetBuffer(float *buffer, uint32_t size) {
+    this->buffer = buffer;
+    this->size = size;
 }
 
 void CCombFilter::SetDamp(float damp) {
@@ -46,8 +47,3 @@ void CCombFilter::SetDamp(float damp) {
 void CCombFilter::SetFeedback(float feedback) {
     this->feedback = feedback;
 }
-
-void CCombFilter::SetBuffer(float *buffer, uint32_t size) {
-    this->buffer = buffer;
-    this->size = size;
-}

src/cpp/viper/utils/CCombFilter.h

@@ -10,20 +10,15 @@ class CCombFilter {
 public:
     CCombFilter();
 
-    float Process(float sample);
-
-    void Mute();
-
     float GetDamp();
-
     float GetFeedback();
-
+    void Mute();
+    float Process(float sample);
+    void SetBuffer(float *buffer, uint32_t size);
     void SetDamp(float damp);
-
     void SetFeedback(float feedback);
 
-    void SetBuffer(float *buffer, uint32_t size);
-
+private:
     float feedback;
     float filterstore;
     float damp;

src/cpp/viper/utils/DepthSurround.cpp

@@ -12,9 +12,11 @@ DepthSurround::DepthSurround() {
     this->enabled = false;
     this->strengthAtLeast500 = false;
     this->gain = 0;
-    memset(&this->prev, 0, 2 * sizeof(float));
-    SetSamplingRate(DEFAULT_SAMPLERATE);
-    RefreshStrength(this->strength);
+    for (auto &prev : this->prev) {
+        prev = 0.0f;
+    }
+    this->SetSamplingRate(DEFAULT_SAMPLERATE);
+    this->RefreshStrength(this->strength);
 }
 
 void DepthSurround::Process(float *samples, uint32_t size) {
@@ -61,11 +63,11 @@ void DepthSurround::RefreshStrength(short strength) {
     this->strengthAtLeast500 = strength >= 500;
     this->enabled = strength != 0;
     if (strength != 0) {
-        float _gain = powf(10.f, ((strength / 1000.f) * 10.f - 15.f) / 20.f);
-        if (fabsf(_gain) > 1.f) {
-            _gain = 1.f;
+        float gain = powf(10.0f, ((strength / 1000.0f) * 10.0f - 15.0f) / 20.0f);
+        if (fabsf(gain) > 1.0f) {
+            gain = 1.0f;
         }
-        this->gain = _gain;
+        this->gain = gain;
     } else {
         this->gain = 0;
     }
@@ -74,11 +76,13 @@ void DepthSurround::RefreshStrength(short strength) {
 void DepthSurround::SetSamplingRate(uint32_t samplerate) {
     this->delay[0].SetParameters(samplerate, 0.02);
     this->delay[1].SetParameters(samplerate, 0.014);
-    this->highpass.SetHighPassParameter(800.f, samplerate, -11.0f, 0.72f, 0);
-    memset(&this->prev, 0, 2 * sizeof(float));
+    this->highpass.SetHighPassParameter(800.0f, samplerate, -11.0f, 0.72f, 0);
+    for (auto &prev : this->prev) {
+        prev = 0.0f;
+    }
 }
 
 void DepthSurround::SetStrength(short strength) {
     this->strength = strength;
-    RefreshStrength(strength);
+    this->RefreshStrength(strength);
 }

src/cpp/viper/utils/FIR.cpp

@@ -0,0 +1,35 @@
+#include "FIR.h"
+
+FIR::FIR() {
+
+}
+
+FIR::~FIR() {
+    delete this->offsetBlock;
+    delete this->coeffs;
+    delete this->block;
+}
+
+void FIR::FilterSamples(int *samples, uint32_t size) {
+    this->FilterSamplesInterleaved(samples, size, 1);
+}
+
+void FIR::FilterSamplesInterleaved(int *samples, uint32_t size, uint32_t channels) {
+
+}
+
+int FIR::GetBlockLength() {
+    return this->blockLength;
+}
+
+int FIR::LoadCoefficients(float *coeffs, uint32_t coeffsize, int blockLength) {
+    return 0;
+}
+
+void FIR::Reset() {
+    if (this->offsetBlock != nullptr && this->coeffsize + this->blockLength > -1) {
+        for (int i = 0; i < this->coeffsize + this->blockLength; i++) {
+            this->offsetBlock[i] = 0;
+        }
+    }
+}

src/cpp/viper/utils/FIR.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <cstdint>
+
+class FIR {
+public:
+    FIR();
+    ~FIR();
+
+    void FilterSamples(int *samples, uint32_t size);
+    void FilterSamplesInterleaved(int *samples, uint32_t size, uint32_t channels);
+    int GetBlockLength();
+    int LoadCoefficients(float *coeffs, uint32_t coeffsize, int blockLength);
+    void Reset();
+
+private:
+    int *offsetBlock;
+    float *coeffs;
+    float *block;
+    int coeffsize;
+    int blockLength;
+    bool enabled;
+
+};
+
+

src/cpp/viper/utils/HiFi.cpp

@@ -1,7 +1,3 @@
-//
-// Created by mart on 7/31/21.
-//
-
 #include "HiFi.h"
 #include "../constants.h"
 

src/cpp/viper/utils/HiFi.h

@@ -1,7 +1,3 @@
-//
-// Created by mart on 7/31/21.
-//
-
 #pragma once
 
 

src/cpp/viper/utils/MultiBiquad.cpp

@@ -30,8 +30,6 @@ float MultiBiquad::ProcessSample(float sample) {
 void
 MultiBiquad::RefreshFilter(FilterType type, float gainAmp, float freq, float samplerate, float qFactor, bool param_7) {
     bool uVar1;
-    int iVar2;
-    int iVar3;
     double dVar4;
     double dVar5;
     double dVar6;

src/cpp/viper/utils/Polyphase.cpp

@@ -0,0 +1,26 @@
+#include "Polyphase.h"
+
+Polyphase::Polyphase() {
+
+}
+
+Polyphase::~Polyphase() {
+
+}
+
+uint32_t Polyphase::GetLatency() {
+    return 63;
+}
+
+void Polyphase::Process(float *samples, uint32_t size) {
+
+}
+
+void Polyphase::Reset() {
+
+}
+
+void Polyphase::SetSamplingRate(uint32_t samplingRate) {
+
+}
+

src/cpp/viper/utils/Polyphase.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <cstdint>
+#include "WaveBuffer_I32.h"
+#include "FIR.h"
+
+class Polyphase {
+public:
+    Polyphase();
+    ~Polyphase();
+
+    uint32_t GetLatency();
+    void Process(float *samples, uint32_t size);
+    void Reset();
+    void SetSamplingRate(uint32_t samplingRate);
+
+private:
+    FIR *fir1;
+    FIR *fir2;
+    WaveBuffer_I32 *waveBuffer1;
+    WaveBuffer_I32 *waveBuffer2;
+    int *unknown1;
+    bool enabled;
+    // 3 unknowns
+    uint32_t samplingRate;
+};
+
+

src/cpp/viper/utils/Stereo3DSurround.cpp

@@ -0,0 +1,22 @@
+#include "Stereo3DSurround.h"
+
+Stereo3DSurround::Stereo3DSurround() {
+    this->midImage = 1.0f;
+    this->stereoWiden = 0.0f;
+    this->unknown1 = 1.0f;
+    this->unknown2 = 0.5f;
+    this->coeffLeft = 0.5f;
+    this->coeffRight = 0.5f;
+}
+
+void Stereo3DSurround::Process(float *samples, uint32_t size) {
+
+}
+
+void Stereo3DSurround::SetMiddleImage(float middleImage) {
+
+}
+
+void Stereo3DSurround::SetStereoWiden(float stereoWiden) {
+
+}

src/cpp/viper/utils/Stereo3DSurround.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <cstdint>
+
+class Stereo3DSurround {
+public:
+    Stereo3DSurround();
+
+    void Process(float *samples, uint32_t size);
+    void SetMiddleImage(float middleImage);
+    void SetStereoWiden(float stereoWiden);
+
+private:
+    float stereoWiden;
+    float midImage;
+    float unknown1;
+    float unknown2;
+    float coeffLeft;
+    float coeffRight;
+};
+
+

src/cpp/viper/utils/WaveBuffer_I32.cpp

@@ -1,7 +1,3 @@
-//
-// Created by mart on 7/31/21.
-//
-
 #include <cstdlib>
 #include <cstring>
 #include "WaveBuffer_I32.h"

src/cpp/viper/utils/WaveBuffer_I32.h

@@ -1,7 +1,3 @@
-//
-// Created by mart on 7/31/21.
-//
-
 #pragma once