visual stuff

src/AudioEngine.cpp

@@ -1,3 +1,5 @@
+// src/AudioEngine.cpp
+
 #include "AudioEngine.h"
 #include <QMediaDevices>
 #include <QAudioDevice>
@@ -7,10 +9,30 @@
 #include <QAudioBuffer>
 #include <QDebug>
 #include <QtGlobal>
+#include <algorithm>
 
 AudioEngine::AudioEngine(QObject* parent) : QObject(parent) {
+    // Main Processors (Steady State)
     m_processors.push_back(new Processor(m_frameSize, m_sampleRate));
     m_processors.push_back(new Processor(m_frameSize, m_sampleRate));
+    
+    // Configure Main: Expander + HPF + Moderate Smoothing
+    for(auto p : m_processors) {
+        p->setExpander(1.5f, -50.0f); // Gentle expansion to clean up noise
+        p->setHPF(60.0f);             // Cut rumble below 60Hz
+        p->setSmoothing(3);
+    }
+
+    // Transient Processors (Secondary, Fast)
+    int transSize = std::max(64, m_frameSize / 4);
+    m_transientProcessors.push_back(new Processor(transSize, m_sampleRate));
+    m_transientProcessors.push_back(new Processor(transSize, m_sampleRate));
+
+    // Configure Transient: Aggressive expansion, light smoothing
+    for(auto p : m_transientProcessors) {
+        p->setExpander(2.5f, -40.0f); // Expand dynamics around -40dB
+        p->setSmoothing(2);           // Fast decay
+    }
 
     m_processTimer = new QTimer(this);
     m_processTimer->setInterval(16);
@@ -20,11 +42,13 @@ AudioEngine::AudioEngine(QObject* parent) : QObject(parent) {
 AudioEngine::~AudioEngine() {
     stop();
     for(auto p : m_processors) delete p;
+    for(auto p : m_transientProcessors) delete p;
     if (m_fileSource) delete m_fileSource;
 }
 
 void AudioEngine::setNumBins(int n) {
     for(auto p : m_processors) p->setNumBins(n);
+    for(auto p : m_transientProcessors) p->setNumBins(n);
 }
 
 void AudioEngine::loadTrack(const QString& filePath) {
@@ -32,6 +56,8 @@ void AudioEngine::loadTrack(const QString& filePath) {
     m_pcmData.clear();
     m_buffer.close();
 
+    m_sampleRate = 48000;
+
     if (m_fileSource) {
         m_fileSource->close();
         delete m_fileSource;
@@ -42,7 +68,6 @@ void AudioEngine::loadTrack(const QString& filePath) {
     m_decoder = new QAudioDecoder(this);
 
     QAudioFormat format;
-    format.setSampleRate(44100);
     format.setChannelCount(2);
     format.setSampleFormat(QAudioFormat::Int16);
     m_decoder->setAudioFormat(format);
@@ -60,7 +85,6 @@ void AudioEngine::loadTrack(const QString& filePath) {
     } else {
         delete m_fileSource;
         m_fileSource = nullptr;
-        // Fix: Handle content:// URIs correctly
         if (filePath.startsWith("content://")) {
             m_decoder->setSource(QUrl(filePath));
         } else {
@@ -83,7 +107,13 @@ void AudioEngine::onBufferReady() {
     QAudioBuffer buffer = m_decoder->read();
     if (!buffer.isValid()) return;
 
-    // Fix: Explicit cast to int to avoid warning
+    if (buffer.format().sampleRate() != m_sampleRate && buffer.format().sampleRate() > 0) {
+        m_sampleRate = buffer.format().sampleRate();
+        qDebug() << "AudioEngine: Switching sample rate to" << m_sampleRate;
+        for(auto p : m_processors) p->setSampleRate(m_sampleRate);
+        for(auto p : m_transientProcessors) p->setSampleRate(m_sampleRate);
+    }
+
     const int frames = static_cast<int>(buffer.frameCount());
     const int channels = buffer.format().channelCount();
     auto sampleType = buffer.format().sampleFormat();
@@ -153,7 +183,7 @@ void AudioEngine::play() {
     }
 
     QAudioFormat format;
-    format.setSampleRate(44100);
+    format.setSampleRate(m_sampleRate);
     format.setChannelCount(2);
     format.setSampleFormat(QAudioFormat::Float);
 
@@ -164,13 +194,12 @@ void AudioEngine::play() {
     }
 
     if (!device.isFormatSupported(format)) {
-        qWarning() << "AudioEngine: Float format not supported, using preferred format.";
+        qWarning() << "AudioEngine: Format not supported, using preferred format.";
         format = device.preferredFormat();
     }
 
     m_sink = new QAudioSink(device, format, this);
 
-
     connect(m_sink, &QAudioSink::stateChanged, this, [this](QAudio::State state){
         if (state == QAudio::IdleState && m_sink->error() == QAudio::NoError) {
             if (m_buffer.bytesAvailable() == 0) {
@@ -208,7 +237,13 @@ void AudioEngine::seek(float position) {
 void AudioEngine::setDspParams(int frameSize, int hopSize) {
     m_frameSize = frameSize;
     m_hopSize = hopSize;
+    
+    // Main: Full size
     for(auto p : m_processors) p->setFrameSize(frameSize);
+    
+    // Transient: 1/4 size (Minimum 64)
+    int transSize = std::max(64, frameSize / 4);
+    for(auto p : m_transientProcessors) p->setFrameSize(transSize);
 }
 
 void AudioEngine::onProcessTimer() {
@@ -223,6 +258,7 @@ void AudioEngine::onProcessTimer() {
 
     if (sampleIdx + m_frameSize * 2 >= totalSamples) return;
 
+    // Prepare data for Main Processors
     std::vector<float> ch0(m_frameSize), ch1(m_frameSize);
     for (int i = 0; i < m_frameSize; ++i) {
         ch0[i] = samples[sampleIdx + i*2];
@@ -232,10 +268,31 @@ void AudioEngine::onProcessTimer() {
     m_processors[0]->pushData(ch0);
     m_processors[1]->pushData(ch1);
 
+    // Prepare data for Transient Processors (Smaller window)
+    int transSize = std::max(64, m_frameSize / 4);
+    std::vector<float> tCh0(transSize), tCh1(transSize);
+    int offset = m_frameSize - transSize; 
+    for (int i = 0; i < transSize; ++i) {
+        tCh0[i] = ch0[offset + i];
+        tCh1[i] = ch1[offset + i];
+    }
+
+    m_transientProcessors[0]->pushData(tCh0);
+    m_transientProcessors[1]->pushData(tCh1);
+
     std::vector<FrameData> results;
-    for (auto p : m_processors) {
+    for (size_t i = 0; i < m_processors.size(); ++i) {
-        auto spec = p->getSpectrum();
+        auto specMain = m_processors[i]->getSpectrum();
-        results.push_back({spec.freqs, spec.db});
+        auto specTrans = m_transientProcessors[i]->getSpectrum();
+
+        // Mix: Overlay the expanded transient peaks onto the main spectrum
+        if (specMain.db.size() == specTrans.db.size()) {
+            for(size_t b = 0; b < specMain.db.size(); ++b) {
+                specMain.db[b] = std::max(specMain.db[b], specTrans.db[b]);
+            }
+        }
+
+        results.push_back({specMain.freqs, specMain.db});
     }
     emit spectrumReady(results);
 }

src/AudioEngine.h

@@ -51,9 +51,11 @@ private:
     QFile* m_fileSource = nullptr;
     QTimer* m_processTimer = nullptr;
 
-    std::vector<Processor*> m_processors;
+    std::vector<Processor*> m_processors;          // Main (Steady)
-    int m_frameSize = 32768;
+    std::vector<Processor*> m_transientProcessors; // Secondary (Fast/Transient)
+
+    int m_frameSize = 4096;
     int m_hopSize = 1024;
-    int m_sampleRate = 44100;
+    int m_sampleRate = 48000;
     int m_channels = 2;
 };

src/PlayerControls.cpp

@@ -160,12 +160,15 @@ SettingsWidget::SettingsWidget(QWidget* parent) : QWidget(parent) {
 
     m_padDsp = new XYPad("DSP", this);
     m_padDsp->setFormatter([](float x, float y) {
-        int fft = std::pow(2, 13 + (int)(x * 4.0f + 0.5f));
+        // Range: 2^6 (64) to 2^13 (8192)
+        int power = 6 + (int)(x * 7.0f + 0.5f);
+        int fft = std::pow(2, power);
         int hop = 64 + y * (8192 - 64);
         return QString("FFT: %1\nHop: %2").arg(fft).arg(hop);
     });
     
-    m_padDsp->setValues(0.5f, 0.118f);
+    // Default to ~4096 FFT (x approx 0.857) and reasonable hop
+    m_padDsp->setValues(0.857f, 0.118f);
     connect(m_padDsp, &XYPad::valuesChanged, this, &SettingsWidget::onDspPadChanged);
     padsLayout->addWidget(m_padDsp);
 
@@ -225,7 +228,8 @@ void SettingsWidget::emitParams() {
 }
 
 void SettingsWidget::onDspPadChanged(float x, float y) {
-    int power = 13 + (int)(x * 4.0f + 0.5f);
+    // Range: 2^6 (64) to 2^13 (8192)
+    int power = 6 + (int)(x * 7.0f + 0.5f);
     m_fft = std::pow(2, power);
     m_hop = 64 + y * (8192 - 64);
     emit dspParamsChanged(m_fft, m_hop);

src/PlayerControls.h

@@ -81,7 +81,7 @@ private:
     float m_contrast = 1.0f;
     float m_brightness = 1.0f;
     float m_entropy = 1.0f;
-    int m_fft = 32768;
+    int m_fft = 4096;
     int m_hop = 1024;
     int m_bins = 26;
 };

src/Processor.cpp

@@ -21,10 +21,30 @@ Processor::~Processor() {
     if (m_out) fftwf_free(m_out);
 }
 
+void Processor::setSampleRate(int rate) {
+    m_sampleRate = rate;
+}
+
+void Processor::setSmoothing(int historyLength) {
+    m_smoothingLength = std::max(1, historyLength);
+    while (m_history.size() > m_smoothingLength) {
+        m_history.pop_front();
+    }
+}
+
+void Processor::setExpander(float ratio, float thresholdDb) {
+    m_expandRatio = ratio;
+    m_expandThreshold = thresholdDb;
+}
+
+void Processor::setHPF(float cutoffFreq) {
+    m_hpfCutoff = cutoffFreq;
+}
+
 void Processor::setNumBins(int n) {
     m_customBins.clear();
     m_freqsConst.clear();
-    m_history.clear(); // Clear history on bin change to avoid size mismatch
+    m_history.clear(); 
 
     float minFreq = 40.0f;
     float maxFreq = 11000.0f;
@@ -54,7 +74,7 @@ void Processor::setFrameSize(int size) {
     m_plan = fftwf_plan_dft_r2c_1d(m_frameSize, m_in, m_out, FFTW_ESTIMATE);
 
     m_window.resize(m_frameSize);
-    // Blackman-Harris window for excellent side-lobe suppression (reduces spectral leakage/noise)
+    // Blackman-Harris window
     for (int i = 0; i < m_frameSize; ++i) {
         float a0 = 0.35875f;
         float a1 = 0.48829f;
@@ -114,24 +134,32 @@ Processor::Spectrum Processor::getSpectrum() {
         float im = m_out[i][1];
         float mag = 2.0f * std::sqrt(re*re + im*im) / m_frameSize;
         
+        float freq = i * (float)m_sampleRate / m_frameSize;
+        
+        // HPF: Attenuate frequencies below cutoff
+        if (freq < m_hpfCutoff) {
+            mag *= 0.0001f; // -80dB attenuation
+        }
+
         dbFull[i] = 20.0f * std::log10(std::max(mag, 1e-12f));
-        freqsFull[i] = i * (float)m_sampleRate / m_frameSize;
+        freqsFull[i] = freq;
     }
 
     // 4. Map to Custom Bins (Log Scale)
     std::vector<float> currentDb(m_freqsConst.size());
     for (size_t i = 0; i < m_freqsConst.size(); ++i) {
         float val = getInterpolatedDb(freqsFull, dbFull, m_freqsConst[i]);
+        
+        // 4b. Apply Expander (Before Smoothing)
+        if (m_expandRatio != 1.0f) {
+            val = (val - m_expandThreshold) * m_expandRatio + m_expandThreshold;
+        }
+
         if (val < -100.0f) val = -100.0f;
         currentDb[i] = val;
     }
 
     // 5. Moving Average Filter
-    // CRITICAL CHANGE: Reduced smoothing to 1 (effectively off) to allow
-    // the VisualizerWidget to detect sharp transients (Flux) accurately.
-    // The Visualizer will handle its own aesthetic smoothing.
-    m_smoothingLength = 1; 
-
     m_history.push_back(currentDb);
     if (m_history.size() > m_smoothingLength) {
         m_history.pop_front();

src/Processor.h

@@ -11,7 +11,14 @@ public:
     ~Processor();
 
     void setFrameSize(int size);
+    void setSampleRate(int rate);
     void setNumBins(int n);
+    
+    // DSP Effects
+    void setSmoothing(int historyLength);
+    void setExpander(float ratio, float thresholdDb);
+    void setHPF(float cutoffFreq);
+
     void pushData(const std::vector<float>& data);
 
     struct Spectrum {
@@ -39,7 +46,14 @@ private:
     
     // Moving Average History
     std::deque<std::vector<float>> m_history;
-    size_t m_smoothingLength = 3; // Number of frames to average
+    size_t m_smoothingLength = 3; 
+
+    // Expander Settings
+    float m_expandRatio = 1.0f;
+    float m_expandThreshold = -60.0f;
+
+    // HPF Settings
+    float m_hpfCutoff = 0.0f;
 
     float getInterpolatedDb(const std::vector<float>& freqs, const std::vector<float>& db, float targetFreq);
 };

src/VisualizerWidget.cpp

@@ -268,6 +268,87 @@ void VisualizerWidget::drawContent(QPainter& p, int w, int h) {
         const auto& bins = m_channels[ch].bins;
         if (bins.empty()) continue;
 
+        // 1. Calculate Raw Energy
+        std::vector<float> rawEnergy(bins.size());
+        for (size_t j = 0; j < bins.size(); ++j) {
+             rawEnergy[j] = std::clamp((bins[j].visualDb + 80.0f) / 80.0f, 0.0f, 1.0f);
+        }
+
+        // 2. Auto-Balance Highs vs Lows (Dynamic Normalization)
+        size_t splitIdx = bins.size() / 2;
+        float maxLow = 0.01f;
+        float maxHigh = 0.01f;
+
+        for (size_t j = 0; j < splitIdx; ++j) maxLow = std::max(maxLow, rawEnergy[j]);
+        for (size_t j = splitIdx; j < bins.size(); ++j) maxHigh = std::max(maxHigh, rawEnergy[j]);
+
+        float trebleBoost = maxLow / maxHigh;
+        trebleBoost = std::clamp(trebleBoost, 1.0f, 40.0f); 
+
+        std::vector<float> vertexEnergy(bins.size());
+        float globalMax = 0.001f;
+
+        for (size_t j = 0; j < bins.size(); ++j) {
+            float val = rawEnergy[j];
+            
+            if (j >= splitIdx) {
+                float t = (float)(j - splitIdx) / (bins.size() - splitIdx);
+                float boost = 1.0f + (trebleBoost - 1.0f) * t;
+                val *= boost;
+            }
+            
+            // Soft-Knee Compression
+            float compressed = std::tanh(val);
+            vertexEnergy[j] = compressed;
+            if (compressed > globalMax) globalMax = compressed;
+        }
+
+        // 3. Global Normalization (Ensure peaks hit 1.0)
+        // This fixes the "faded highs" issue by ensuring the loudest part of the spectrum
+        // (even if it's just high hats) is fully opaque.
+        for (float& v : vertexEnergy) {
+            v = std::clamp(v / globalMax, 0.0f, 1.0f);
+        }
+
+        // 4. Calculate Segment Modifiers (Vote System)
+        std::vector<float> segmentModifiers(freqs.size() - 1, 0.0f);
+
+        for (size_t i = 1; i < vertexEnergy.size() - 1; ++i) {
+            float curr = vertexEnergy[i];
+            float prev = vertexEnergy[i-1];
+            float next = vertexEnergy[i+1];
+
+            // Is this vertex a local peak?
+            if (curr > prev && curr > next) {
+                bool leftDominant = (prev > next);
+                float sharpness = std::min(curr - prev, curr - next);
+                float intensity = std::clamp(sharpness * 4.0f, 0.0f, 1.0f);
+
+                float brightBoost = 1.0f * intensity;
+
+                if (leftDominant) {
+                    // Left Segment (i-1) gets Brightness
+                    if (i > 0) segmentModifiers[i-1] += brightBoost;
+                    
+                    // Right Side (Dark Side)
+                    if (i < segmentModifiers.size())     segmentModifiers[i]   -= 0.6f * intensity; // Dark
+                    if (i + 1 < segmentModifiers.size()) segmentModifiers[i+1] -= 0.9f * intensity; // Darker
+                    if (i + 2 < segmentModifiers.size()) segmentModifiers[i+2] -= 0.6f * intensity; // Dark
+                    if (i + 3 < segmentModifiers.size()) segmentModifiers[i+3] -= 0.3f * intensity; // Fade
+
+                } else {
+                    // Right Segment (i) gets Brightness
+                    if (i < segmentModifiers.size()) segmentModifiers[i] += brightBoost;
+                    
+                    // Left Side (Dark Side)
+                    if (i > 0) segmentModifiers[i-1] -= 0.6f * intensity; // Dark
+                    if (i >= 2) segmentModifiers[i-2] -= 0.9f * intensity; // Darker
+                    if (i >= 3) segmentModifiers[i-3] -= 0.6f * intensity; // Dark
+                    if (i >= 4) segmentModifiers[i-4] -= 0.3f * intensity; // Fade
+                }
+            }
+        }
+
         float xOffset = (ch == 1 && m_data.size() > 1) ? 1.005f : 1.0f;
 
         for (size_t i = 0; i < freqs.size() - 1; ++i) {
@@ -288,30 +369,45 @@ void VisualizerWidget::drawContent(QPainter& p, int w, int h) {
                 binColor = QColor::fromHsvF(hue, 1.0f, 1.0f);
             }
 
-            // Use visualDb (Physics processed)
+            // Base Brightness from Energy
-            float meanDb = (b.visualDb + bNext.visualDb) / 2.0f;
+            float avgEnergy = (vertexEnergy[i] + vertexEnergy[i+1]) / 2.0f;
-            float intensity = std::clamp((meanDb + 80.0f) / 80.0f, 0.0f, 1.0f);
+            float baseBrightness = std::pow(avgEnergy, 0.5f); 
+
+            // Apply Shadow/Highlight Modifiers to Brightness
+            float modifier = segmentModifiers[i];
+            float multiplier = (modifier >= 0) ? (1.0f + modifier) : (1.0f / (1.0f - modifier * 2.0f));
+            
+            float finalBrightness = std::clamp(baseBrightness * multiplier * m_brightness, 0.0f, 1.0f);
 
             float h_val, s, v, a;
             binColor.getHsvF(&h_val, &s, &v, &a);
-            float brightness = (0.4f + 0.6f * intensity) * m_brightness;
+            v = std::clamp(v * finalBrightness, 0.0f, 1.0f);
-            v = std::clamp(v * brightness, 0.0f, 1.0f);
             QColor dynamicBinColor = QColor::fromHsvF(h_val, s, v);
 
             QColor fillColor, lineColor;
             if (m_glass) {
                 float uh, us, uv, ua;
                 unifiedColor.getHsvF(&uh, &us, &uv, &ua);
-                float uBrightness = (0.4f + 0.6f * intensity) * m_brightness;
+                fillColor = QColor::fromHsvF(uh, us, std::clamp(uv * finalBrightness, 0.0f, 1.0f));
-                fillColor = QColor::fromHsvF(uh, us, std::clamp(uv * uBrightness, 0.0f, 1.0f));
                 lineColor = dynamicBinColor;
             } else {
                 fillColor = dynamicBinColor;
                 lineColor = dynamicBinColor;
             }
 
+            // --- Alpha Calculation with Shadow Logic ---
+            // 1. Start with the boosted, normalized energy (avgEnergy)
+            // 2. Apply the shadow modifier (linear scalar for alpha)
+            //    If modifier is negative (shadow), reduce alpha.
+            //    If positive (peak), boost alpha slightly.
+            float alphaScalar = (modifier >= 0) ? (1.0f + modifier * 0.2f) : (1.0f + modifier);
+            
+            float intensity = avgEnergy; 
             float alpha = 0.4f + (intensity - 0.5f) * m_contrast;
-            alpha = std::clamp(alpha, 0.0f, 1.0f);
+            
+            // Apply the shadow scalar to the calculated alpha
+            alpha = std::clamp(alpha * alphaScalar, 0.0f, 1.0f);
+            
             fillColor.setAlphaF(alpha);
             lineColor.setAlphaF(0.9f);