Initial commit: InstaDrums VST3 drum sampler plugin
- 12-pad drum sampler with 4x3 grid (expandable by 4) - Velocity layers with round-robin (Salamander-style filename parsing) - Rhythm Engine-style GUI: pad grid (left), sample editor (right top), FX panel (right bottom), master panel (bottom) - Waveform thumbnails on pads + large waveform in sample editor - ADSR envelope, pitch, pan per pad - Drag & drop sample/folder loading - Kit save/load (.drumkit XML presets) - Load Folder with smart name matching (kick, snare, hihat, etc.) - Choke groups, one-shot/polyphonic mode - Dark modern LookAndFeel with neon accent colors - Built with JUCE framework, CMake, MSVC 2022 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
hariel1985
347
Source/PluginProcessor.cpp
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347
Source/PluginProcessor.cpp
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#include "PluginProcessor.h"
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#include "PluginEditor.h"
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InstaDrumsProcessor::InstaDrumsProcessor()
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: AudioProcessor (BusesProperties()
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.withOutput ("Main", juce::AudioChannelSet::stereo(), true))
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{
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formatManager.registerBasicFormats();
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initializeDefaults();
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}
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InstaDrumsProcessor::~InstaDrumsProcessor() {}
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void InstaDrumsProcessor::initializeDefaults()
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{
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// GM Drum Map defaults for first 12 pads
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struct PadDefault { int note; const char* name; juce::uint32 colour; };
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static const PadDefault defaults[] = {
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{ 36, "Kick", 0xffff4444 }, // Red
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{ 38, "Snare", 0xffff8844 }, // Orange
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{ 42, "CH Hat", 0xffffff44 }, // Yellow
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{ 46, "OH Hat", 0xff88ff44 }, // Green
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{ 45, "Low Tom", 0xff44ffaa }, // Teal
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{ 48, "Mid Tom", 0xff44ddff }, // Cyan
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{ 50, "Hi Tom", 0xff4488ff }, // Blue
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{ 49, "Crash", 0xff8844ff }, // Purple
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{ 51, "Ride", 0xffcc44ff }, // Magenta
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{ 39, "Clap", 0xffff44cc }, // Pink
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{ 56, "Cowbell", 0xffff8888 }, // Light red
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{ 37, "Rimshot", 0xffaaaaff }, // Light blue
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};
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for (int i = 0; i < defaultNumPads && i < (int) std::size (defaults); ++i)
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{
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pads[i].midiNote = defaults[i].note;
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pads[i].name = defaults[i].name;
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pads[i].colour = juce::Colour (defaults[i].colour);
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}
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}
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void InstaDrumsProcessor::prepareToPlay (double sampleRate, int samplesPerBlock)
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{
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for (int i = 0; i < numActivePads; ++i)
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pads[i].prepareToPlay (sampleRate, samplesPerBlock);
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}
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void InstaDrumsProcessor::releaseResources()
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{
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for (int i = 0; i < numActivePads; ++i)
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pads[i].releaseResources();
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}
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void InstaDrumsProcessor::processBlock (juce::AudioBuffer<float>& buffer, juce::MidiBuffer& midiMessages)
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{
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juce::ScopedNoDenormals noDenormals;
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buffer.clear();
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// Process MIDI messages
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for (const auto metadata : midiMessages)
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{
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auto msg = metadata.getMessage();
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if (msg.isNoteOn())
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{
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auto* pad = findPadForNote (msg.getNoteNumber());
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if (pad != nullptr)
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{
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// Handle choke groups
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if (pad->chokeGroup >= 0)
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{
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for (int i = 0; i < numActivePads; ++i)
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{
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if (&pads[i] != pad && pads[i].chokeGroup == pad->chokeGroup)
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pads[i].stop();
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}
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}
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pad->trigger (msg.getFloatVelocity());
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}
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}
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else if (msg.isNoteOff())
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{
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auto* pad = findPadForNote (msg.getNoteNumber());
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if (pad != nullptr && ! pad->oneShot)
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pad->stop();
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}
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}
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// Render audio from all pads
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for (int i = 0; i < numActivePads; ++i)
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pads[i].renderNextBlock (buffer, 0, buffer.getNumSamples());
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}
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DrumPad* InstaDrumsProcessor::findPadForNote (int midiNote)
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{
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for (int i = 0; i < numActivePads; ++i)
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if (pads[i].midiNote == midiNote)
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return &pads[i];
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return nullptr;
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}
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void InstaDrumsProcessor::loadSample (int padIndex, const juce::File& file)
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{
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if (padIndex < 0 || padIndex >= numActivePads)
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return;
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if (file.isDirectory())
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pads[padIndex].loadLayersFromFolder (file, formatManager);
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else
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pads[padIndex].loadSample (file, formatManager);
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}
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void InstaDrumsProcessor::addPads (int count)
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{
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int newCount = std::min (numActivePads + count, maxPads);
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for (int i = numActivePads; i < newCount; ++i)
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{
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pads[i].name = "Pad " + juce::String (i + 1);
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pads[i].midiNote = 36 + i; // Sequential mapping
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pads[i].colour = juce::Colour::fromHSV ((float) i / 16.0f, 0.7f, 1.0f, 1.0f);
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}
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numActivePads = newCount;
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}
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void InstaDrumsProcessor::getStateInformation (juce::MemoryBlock& destData)
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{
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juce::XmlElement xml ("InstaDrumsState");
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xml.setAttribute ("numPads", numActivePads);
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for (int i = 0; i < numActivePads; ++i)
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{
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auto* padXml = xml.createNewChildElement ("Pad");
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padXml->setAttribute ("index", i);
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padXml->setAttribute ("name", pads[i].name);
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padXml->setAttribute ("midiNote", pads[i].midiNote);
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padXml->setAttribute ("volume", (double) pads[i].volume);
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padXml->setAttribute ("pan", (double) pads[i].pan);
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padXml->setAttribute ("pitch", (double) pads[i].pitch);
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padXml->setAttribute ("oneShot", pads[i].oneShot);
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padXml->setAttribute ("chokeGroup", pads[i].chokeGroup);
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padXml->setAttribute ("attack", (double) pads[i].attack);
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padXml->setAttribute ("decay", (double) pads[i].decay);
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padXml->setAttribute ("sustain", (double) pads[i].sustain);
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padXml->setAttribute ("release", (double) pads[i].release);
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padXml->setAttribute ("colour", (int) pads[i].colour.getARGB());
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auto lf = pads[i].getLoadedFile();
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if (lf.existsAsFile() || lf.isDirectory())
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padXml->setAttribute ("samplePath", lf.getFullPathName());
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}
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copyXmlToBinary (xml, destData);
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}
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void InstaDrumsProcessor::setStateInformation (const void* data, int sizeInBytes)
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{
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auto xml = getXmlFromBinary (data, sizeInBytes);
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if (xml != nullptr && xml->hasTagName ("InstaDrumsState"))
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{
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numActivePads = xml->getIntAttribute ("numPads", defaultNumPads);
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for (auto* padXml : xml->getChildWithTagNameIterator ("Pad"))
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{
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int index = padXml->getIntAttribute ("index", -1);
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if (index < 0 || index >= numActivePads)
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continue;
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pads[index].name = padXml->getStringAttribute ("name", "Pad");
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pads[index].midiNote = padXml->getIntAttribute ("midiNote", 36 + index);
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pads[index].volume = (float) padXml->getDoubleAttribute ("volume", 1.0);
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pads[index].pan = (float) padXml->getDoubleAttribute ("pan", 0.0);
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pads[index].pitch = (float) padXml->getDoubleAttribute ("pitch", 0.0);
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pads[index].oneShot = padXml->getBoolAttribute ("oneShot", true);
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pads[index].chokeGroup = padXml->getIntAttribute ("chokeGroup", -1);
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pads[index].attack = (float) padXml->getDoubleAttribute ("attack", 0.001);
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pads[index].decay = (float) padXml->getDoubleAttribute ("decay", 0.1);
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pads[index].sustain = (float) padXml->getDoubleAttribute ("sustain", 1.0);
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pads[index].release = (float) padXml->getDoubleAttribute ("release", 0.05);
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pads[index].colour = juce::Colour ((juce::uint32) padXml->getIntAttribute ("colour", 0xff00ff88));
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juce::String path = padXml->getStringAttribute ("samplePath");
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if (path.isNotEmpty())
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{
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juce::File sampleFile (path);
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if (sampleFile.isDirectory())
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pads[index].loadLayersFromFolder (sampleFile, formatManager);
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else if (sampleFile.existsAsFile())
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pads[index].loadSample (sampleFile, formatManager);
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}
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}
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}
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}
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void InstaDrumsProcessor::loadKitFromFolder (const juce::File& folder)
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{
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if (! folder.isDirectory())
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return;
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// Collect audio files from the folder
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juce::Array<juce::File> audioFiles;
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for (auto& f : folder.findChildFiles (juce::File::findFiles, false))
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{
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auto ext = f.getFileExtension().toLowerCase();
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if (ext == ".wav" || ext == ".aiff" || ext == ".aif" || ext == ".flac"
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|| ext == ".ogg" || ext == ".mp3")
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audioFiles.add (f);
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}
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audioFiles.sort();
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// Try to match files to pads by name (kick, snare, etc.)
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auto matchPad = [&] (const juce::String& fileName) -> int
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{
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auto lower = fileName.toLowerCase();
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struct NameMatch { const char* keyword; int padIndex; };
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static const NameMatch matches[] = {
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{ "kick", 0 }, { "bass", 0 }, { "bd", 0 },
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{ "snare", 1 }, { "sn", 1 }, { "sd", 1 },
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{ "closedhihat", 2 }, { "closedhi", 2 }, { "chh", 2 }, { "ch hat", 2 },
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{ "openhihat", 3 }, { "openhi", 3 }, { "ohh", 3 }, { "oh hat", 3 },
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{ "lowtom", 4 }, { "low tom", 4 }, { "lt", 4 },
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{ "midtom", 5 }, { "mid tom", 5 }, { "mt", 5 },
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{ "hitom", 6 }, { "hi tom", 6 }, { "ht", 6 },
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{ "crash", 7 },
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{ "ride", 8 },
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{ "clap", 9 },
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{ "cowbell", 10 }, { "bell", 10 },
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{ "rim", 11 },
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};
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for (auto& m : matches)
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if (lower.contains (m.keyword))
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return m.padIndex;
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return -1;
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};
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// First pass: match by name
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juce::Array<bool> assigned;
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assigned.resize (numActivePads);
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for (int i = 0; i < numActivePads; ++i)
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assigned.set (i, false);
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for (auto& file : audioFiles)
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{
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int idx = matchPad (file.getFileNameWithoutExtension());
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if (idx >= 0 && idx < numActivePads && ! assigned[idx])
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{
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pads[idx].loadSample (file, formatManager);
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assigned.set (idx, true);
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}
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}
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// Second pass: assign remaining files to unassigned pads
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int nextPad = 0;
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for (auto& file : audioFiles)
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{
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int idx = matchPad (file.getFileNameWithoutExtension());
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if (idx >= 0 && idx < numActivePads && assigned[idx])
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continue; // Already assigned
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while (nextPad < numActivePads && assigned[nextPad])
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nextPad++;
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if (nextPad < numActivePads)
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{
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pads[nextPad].loadSample (file, formatManager);
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assigned.set (nextPad, true);
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nextPad++;
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}
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}
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}
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void InstaDrumsProcessor::saveKitPreset (const juce::File& file)
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{
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juce::XmlElement xml ("InstaDrumsKit");
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xml.setAttribute ("version", "1.0");
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xml.setAttribute ("numPads", numActivePads);
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for (int i = 0; i < numActivePads; ++i)
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{
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auto* padXml = xml.createNewChildElement ("Pad");
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padXml->setAttribute ("index", i);
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padXml->setAttribute ("name", pads[i].name);
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padXml->setAttribute ("midiNote", pads[i].midiNote);
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padXml->setAttribute ("volume", (double) pads[i].volume);
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padXml->setAttribute ("pan", (double) pads[i].pan);
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padXml->setAttribute ("pitch", (double) pads[i].pitch);
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padXml->setAttribute ("oneShot", pads[i].oneShot);
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padXml->setAttribute ("chokeGroup", pads[i].chokeGroup);
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padXml->setAttribute ("attack", (double) pads[i].attack);
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padXml->setAttribute ("decay", (double) pads[i].decay);
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padXml->setAttribute ("sustain", (double) pads[i].sustain);
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padXml->setAttribute ("release", (double) pads[i].release);
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padXml->setAttribute ("colour", (int) pads[i].colour.getARGB());
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auto lf = pads[i].getLoadedFile();
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if (lf.existsAsFile() || lf.isDirectory())
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padXml->setAttribute ("samplePath", lf.getFullPathName());
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}
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xml.writeTo (file);
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}
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void InstaDrumsProcessor::loadKitPreset (const juce::File& file)
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{
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auto xml = juce::XmlDocument::parse (file);
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if (xml == nullptr || ! xml->hasTagName ("InstaDrumsKit"))
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return;
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numActivePads = xml->getIntAttribute ("numPads", defaultNumPads);
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for (auto* padXml : xml->getChildWithTagNameIterator ("Pad"))
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{
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int index = padXml->getIntAttribute ("index", -1);
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if (index < 0 || index >= numActivePads)
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continue;
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pads[index].name = padXml->getStringAttribute ("name", pads[index].name);
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pads[index].midiNote = padXml->getIntAttribute ("midiNote", pads[index].midiNote);
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pads[index].volume = (float) padXml->getDoubleAttribute ("volume", 1.0);
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pads[index].pan = (float) padXml->getDoubleAttribute ("pan", 0.0);
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pads[index].pitch = (float) padXml->getDoubleAttribute ("pitch", 0.0);
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pads[index].oneShot = padXml->getBoolAttribute ("oneShot", true);
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pads[index].chokeGroup = padXml->getIntAttribute ("chokeGroup", -1);
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pads[index].attack = (float) padXml->getDoubleAttribute ("attack", 0.001);
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pads[index].decay = (float) padXml->getDoubleAttribute ("decay", 0.1);
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pads[index].sustain = (float) padXml->getDoubleAttribute ("sustain", 1.0);
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pads[index].release = (float) padXml->getDoubleAttribute ("release", 0.05);
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pads[index].colour = juce::Colour ((juce::uint32) padXml->getIntAttribute ("colour", (int) pads[index].colour.getARGB()));
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juce::String path = padXml->getStringAttribute ("samplePath");
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if (path.isNotEmpty())
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{
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juce::File sampleFile (path);
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if (sampleFile.existsAsFile())
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pads[index].loadSample (sampleFile, formatManager);
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}
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}
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}
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juce::AudioProcessorEditor* InstaDrumsProcessor::createEditor()
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{
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return new InstaDrumsEditor (*this);
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}
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juce::AudioProcessor* JUCE_CALLTYPE createPluginFilter()
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{
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return new InstaDrumsProcessor();
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}
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