biggy
3be1e42242
Introduce a CriticalSection controlLock separating control-thread state (matrix, macros, controlLfos) from audio-thread snapshots (audioMatrix, audioMacros, lfos). captureControls() copies under lock at the start of each processBlock; the audio thread never touches control state directly. Cache parameter values in an unordered_map keyed by string_view to avoid per-sample APVTS lookups. Prebuild wavetables in the constructor instead of lazy allocation. Resize mixBuffer only in prepare(), not per block. Render MIDI events at their sample positions using sub-block rendering with renderUntil(), so notes start at the correct sub-sample offset. Make RaveController non-destructive: replace APVTS mutation with a static apply() that boosts the RenderContext and FX slots for the current block only. Remove the snapshot/restore machinery. Make currentProgram atomic. Validate state I/O: check XML tag, clamp program index, sanitize LFO shape data, and use beginChangeGesture/endChangeGesture for RAVE toggle. Reset parameters to defaults before loading preset values.
367 lines
13 KiB
C++
367 lines
13 KiB
C++
#include "Engine.h"
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#include "RAVEButton.h"
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namespace serum
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{
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namespace
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{
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inline float limit (float x) noexcept
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{
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const float ax = std::fabs (x);
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if (ax < 0.8f)
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return x;
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const float over = ax - 0.8f;
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const float clipped = 0.8f + std::tanh (over) * 0.2f;
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return std::copysign (clipped, x);
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}
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}
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Engine::Engine()
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{
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wavetables.prebuild();
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audioMatrix.connections.reserve (ModulationMatrix::kMaxConnections);
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for (auto& assignments : audioMacros.assignments)
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assignments.reserve (MacroControls::kMaxAssignments);
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}
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void Engine::prepare (double sampleRate, int maxBlockSize, juce::AudioProcessorValueTreeState& apvts)
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{
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const juce::ScopedLock lock (controlLock);
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sr = sampleRate;
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blockSize = juce::jmax (1, maxBlockSize);
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parameterValues.clear();
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for (auto* parameter : apvts.processor.getParameters())
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if (auto* ranged = dynamic_cast<juce::RangedAudioParameter*> (parameter))
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if (auto* raw = apvts.getRawParameterValue (ranged->paramID))
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parameterValues.emplace (std::string_view (ranged->paramID.toRawUTF8()),
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ParameterValue { raw, raw->load() });
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for (auto& voice : voices)
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voice.prepare (sampleRate, blockSize);
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for (auto& lfo : lfos)
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lfo.prepare (sampleRate);
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fx.prepare (sampleRate, blockSize);
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mixBuffer.setSize (2, blockSize, false, false, true);
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reset();
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captureControls();
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}
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void Engine::reset()
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{
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for (auto& voice : voices)
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voice.reset();
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for (auto& lfo : lfos)
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lfo.reset();
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fx.reset();
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pitchBend = 0.0f;
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modWheel = 0.0f;
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activeVoiceCount.store (0, std::memory_order_relaxed);
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mixBuffer.clear();
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}
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void Engine::captureControls()
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{
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const juce::ScopedTryLock lock (controlLock);
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if (! lock.isLocked())
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return;
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audioMatrix.connections.assign (matrix.connections.begin(),
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matrix.connections.begin() + juce::jmin (matrix.size(), ModulationMatrix::kMaxConnections));
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for (int i = 0; i < kNumMacros; ++i)
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{
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const auto& source = macros.assignments[(size_t) i];
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auto& dest = audioMacros.assignments[(size_t) i];
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dest.assign (source.begin(), source.begin() + juce::jmin ((int) source.size(), MacroControls::kMaxAssignments));
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}
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for (int i = 0; i < kNumLfos; ++i)
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lfos[(size_t) i].setShapeData (controlLfos[(size_t) i].getShapeData(),
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controlLfos[(size_t) i].getShapeSteps());
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for (auto& entry : parameterValues)
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{
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const float value = entry.second.source->load (std::memory_order_relaxed);
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entry.second.value = std::isfinite (value) ? juce::jlimit (0.0f, 1.0f, value) : 0.0f;
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}
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}
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void Engine::setLfoShapeData (int index, const std::vector<float>& data, int steps)
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{
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const juce::ScopedLock lock (controlLock);
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index = juce::jlimit (0, kNumLfos - 1, index);
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controlLfos[(size_t) index].setShapeData (data, steps);
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}
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float Engine::v (const char* id) const
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{
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const auto it = parameterValues.find (id);
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return it != parameterValues.end() ? it->second.value : 0.0f;
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}
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int Engine::vic (const char* id, int maxValue) const
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{
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return juce::jlimit (0, maxValue, (int) std::llround (v (id) * maxValue));
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}
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SynthVoice* Engine::findFreeVoice()
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{
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for (auto& voice : voices)
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if (! voice.isActive())
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return &voice;
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return nullptr;
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}
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SynthVoice* Engine::stealVoice()
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{
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// Prefer stealing an already-released voice, then the oldest active one.
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SynthVoice* best = nullptr;
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juce::uint64 bestId = std::numeric_limits<juce::uint64>::max();
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for (auto& voice : voices)
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if (voice.isActive() && voice.isReleased() && voice.getNoteId() < bestId)
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{
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best = &voice;
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bestId = voice.getNoteId();
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}
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if (best != nullptr)
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return best;
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for (auto& voice : voices)
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if (voice.isActive() && voice.getNoteId() < bestId)
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{
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best = &voice;
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bestId = voice.getNoteId();
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}
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return best != nullptr ? best : &voices[0];
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}
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void Engine::noteOn (int noteNumber, float velocity01)
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{
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SynthVoice* voice = findFreeVoice();
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if (voice == nullptr)
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voice = stealVoice();
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const double freq = juce::MidiMessage::getMidiNoteInHertz (noteNumber);
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voice->noteOn (noteNumber, juce::jlimit (0.0f, 1.0f, velocity01), freq, (juce::uint32) (++noteCounter));
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}
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void Engine::noteOff (int noteNumber)
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{
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for (auto& voice : voices)
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if (voice.isActive() && voice.getNote() == noteNumber && ! voice.isReleased())
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voice.noteOff();
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}
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void Engine::allNotesOff()
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{
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for (auto& voice : voices)
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if (voice.isActive())
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voice.noteOff();
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}
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void Engine::readOscParams (const paramIds::Oscillator& ids, OscParams& o) const
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{
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o.enabled = v (ids.on) > 0.5f;
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o.wave = vic (ids.wave, kNumWavetables - 1);
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o.wtPos = v (ids.wtPos);
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o.warp = vic (ids.warp, (int) WarpMode::Count - 1);
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o.warpAmt = v (ids.warpAmt);
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o.coarse = vic (ids.coarse, 48) - 24;
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o.fine = vic (ids.fine, 200) - 100;
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o.level = v (ids.level);
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o.pan = v (ids.pan) * 2.0f - 1.0f;
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o.unison = 1 + vic (ids.unison, kMaxUnison - 1);
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o.detune = v (ids.detune);
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o.spread = v (ids.spread);
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o.phase = v (ids.phase);
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o.randPhase = v (ids.randPhase);
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}
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void Engine::processBlock (juce::AudioBuffer<float>& buffer, juce::MidiBuffer& midi,
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juce::AudioProcessorValueTreeState&, juce::AudioPlayHead* playhead)
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{
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const int n = buffer.getNumSamples();
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const int numCh = buffer.getNumChannels();
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captureControls();
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// Tempo.
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if (playhead != nullptr)
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if (auto pos = playhead->getPosition())
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if (auto tempo = pos->getBpm())
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if (std::isfinite (*tempo) && *tempo > 0.0)
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bpm = *tempo;
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// Advance LFOs and capture their values at control-rate render boundaries.
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for (int i = 0; i < kNumLfos; ++i)
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{
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auto& lfo = lfos[(size_t) i];
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lfo.setTempo (bpm);
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lfo.setParams (v (paramIds::lfoRate[i]), v (paramIds::lfoSync[i]) > 0.5f,
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v (paramIds::lfoBeat[i]), vic (paramIds::lfoShape[i], (int) LfoShape::Count - 1),
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v (paramIds::lfoPhase[i]), v (paramIds::lfoFade[i]), v (paramIds::lfoDelay[i]));
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}
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// Build the render context.
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RenderContext ctx;
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ctx.sampleRate = sr;
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ctx.wavetables = &wavetables;
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ctx.matrix = &audioMatrix;
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ctx.macros = &audioMacros;
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for (int i = 0; i < kNumMacros; ++i)
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ctx.macroValues[i] = v (paramIds::macros[i]);
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readOscParams (paramIds::oscillators[0], ctx.oscA);
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readOscParams (paramIds::oscillators[1], ctx.oscB);
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ctx.subOn = v (ids::subOn) > 0.5f;
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ctx.subShape = vic (ids::subShape, (int) SubShape::Count - 1);
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ctx.subOct = vic (ids::subOct, 2) - 2;
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ctx.subLevel = v (ids::subLevel);
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ctx.noiseOn = v (ids::noiseOn) > 0.5f;
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ctx.noiseType = vic (ids::noiseType, (int) NoiseType::Count - 1);
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ctx.noiseLevel = v (ids::noiseLevel);
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ctx.filters.f1On = v (ids::f1On) > 0.5f;
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ctx.filters.f1Type = vic (ids::f1Type, (int) FilterModel::Count - 1);
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ctx.filters.f1Cutoff = v (ids::f1Cutoff);
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ctx.filters.f1Res = v (ids::f1Res);
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ctx.filters.f1Drive = v (ids::f1Drive);
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ctx.filters.f1Key = v (ids::f1Key);
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ctx.filters.f1Slope = vic (ids::f1Slope, 2);
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ctx.filters.f2On = v (ids::f2On) > 0.5f;
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ctx.filters.f2Type = vic (ids::f2Type, (int) FilterModel::Count - 1);
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ctx.filters.f2Cutoff = v (ids::f2Cutoff);
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ctx.filters.f2Res = v (ids::f2Res);
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ctx.filters.f2Drive = v (ids::f2Drive);
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ctx.filters.f2Key = v (ids::f2Key);
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ctx.filters.f2Slope = vic (ids::f2Slope, 2);
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ctx.filters.route = vic (ids::fRoute, (int) FilterRoute::Count - 1);
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ctx.filters.mix = v (ids::fMix);
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ctx.filters.out = v (ids::fOut) * 1.5f;
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for (int i = 0; i < kNumEnvelopes; ++i)
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{
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ctx.envAttack[i] = v (paramIds::envAttack[i]);
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ctx.envDecay[i] = v (paramIds::envDecay[i]);
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ctx.envSustain[i] = v (paramIds::envSustain[i]);
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ctx.envRelease[i] = v (paramIds::envRelease[i]);
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ctx.envCurve[i] = v (paramIds::envCurve[i]);
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}
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// FX rack.
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std::array<FxSlotParams, kNumFxSlots> slots;
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for (int i = 0; i < kNumFxSlots; ++i)
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{
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auto& slot = slots[(size_t) i];
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slot.type = vic (paramIds::fxType[i], (int) FxType::Count - 1);
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slot.mix = v (paramIds::fxMix[i]);
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slot.p[0] = v (paramIds::fxP1[i]);
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slot.p[1] = v (paramIds::fxP2[i]);
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slot.p[2] = v (paramIds::fxP3[i]);
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slot.p[3] = v (paramIds::fxP4[i]);
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}
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if (v (ids::rave) > 0.5f)
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RaveController::apply (ctx, slots.data(), kNumFxSlots);
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int offset = 0;
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auto renderUntil = [&] (int end)
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{
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while (offset < end)
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{
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const int count = juce::jmin (end - offset, juce::jmin (blockSize, 64));
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ctx.modWheel = modWheel;
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ctx.pitchBend = pitchBend;
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for (int i = 0; i < kNumLfos; ++i)
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ctx.lfoValues[i] = lfos[(size_t) i].getValue();
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const SynthVoice* newest = nullptr;
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for (const auto& voice : voices)
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if (voice.isActive() && (newest == nullptr || voice.getNoteId() > newest->getNoteId()))
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newest = &voice;
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auto sourceValue = [&] (ModSource source)
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{
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const int index = (int) source;
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if (source >= ModSource::Lfo1 && source <= ModSource::Lfo4)
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return ctx.lfoValues[index - (int) ModSource::Lfo1];
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if (source >= ModSource::Macro1 && source <= ModSource::Macro4)
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return ctx.macroValues[index - (int) ModSource::Macro1];
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if (source == ModSource::ModWheel) return modWheel;
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if (source == ModSource::PitchBend) return pitchBend;
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return newest != nullptr ? newest->getModulationValue (source) : 0.0f;
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};
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std::array<float, kNumModTargets> globalMod {};
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for (const auto& connection : audioMatrix.connections)
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if (! isPerVoiceTarget (connection.target))
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{
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float value = sourceValue (connection.source);
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if (connection.bipolar && ! isBipolarSource (connection.source))
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value = value * 2.0f - 1.0f;
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globalMod[(size_t) connection.target] += value * connection.depth;
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}
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for (int i = 0; i < kNumMacros; ++i)
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for (const auto& assignment : audioMacros.assignments[(size_t) i])
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if (! isPerVoiceTarget (assignment.target))
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globalMod[(size_t) assignment.target] += ctx.macroValues[i] * assignment.depth;
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// Prepare the voice mix buffer.
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juce::AudioBuffer<float> block (mixBuffer.getArrayOfWritePointers(), 2, count);
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block.clear();
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// Render all active voices into the mix buffer.
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for (auto& voice : voices)
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if (voice.isActive())
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voice.render (block.getWritePointer (0), block.getWritePointer (1), count, ctx);
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auto modulatedSlots = slots;
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for (int i = 0; i < kNumFxSlots; ++i)
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modulatedSlots[(size_t) i].mix = juce::jlimit (0.0f, 1.0f,
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slots[(size_t) i].mix + globalMod[(size_t) ModTarget::Fx1Mix + (size_t) i]);
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fx.process (block, modulatedSlots.data(), kNumFxSlots);
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// Master + soft limiting.
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const float master = juce::jlimit (0.0f, 1.0f, v (ids::master) + globalMod[(size_t) ModTarget::Master]);
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for (int ch = 0; ch < numCh; ++ch)
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{
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float* dest = buffer.getWritePointer (ch, offset);
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const float* src = block.getReadPointer (ch < 2 ? ch : 0);
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for (int i = 0; i < count; ++i)
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dest[i] = limit (src[i] * master);
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}
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for (auto& lfo : lfos)
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lfo.advance (count);
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offset += count;
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}
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};
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// MIDI.
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for (const auto meta : midi)
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{
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renderUntil (juce::jlimit (offset, n, meta.samplePosition));
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const auto message = meta.getMessage();
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if (message.isNoteOn())
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noteOn (message.getNoteNumber(), message.getFloatVelocity());
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else if (message.isNoteOff())
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noteOff (message.getNoteNumber());
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else if (message.isPitchWheel())
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pitchBend = (message.getPitchWheelValue() - 8192) / 8192.0f;
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else if (message.isAllSoundOff())
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{
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for (auto& voice : voices)
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voice.reset();
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fx.reset();
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}
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else if (message.isAllNotesOff())
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allNotesOff();
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else if (message.isController() && message.getControllerNumber() == 1)
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modWheel = message.getControllerValue() / 127.0f;
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}
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renderUntil (n);
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int active = 0;
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for (const auto& voice : voices)
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active += voice.isActive() ? 1 : 0;
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activeVoiceCount.store (active, std::memory_order_relaxed);
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}
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} // namespace serum
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