Add MIDI input driver
Signed-off-by: falkTX <falktx@falktx.com>
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falkTX
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4 changed files with 366 additions and 127 deletions
312
src/PluginDriver.hpp
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312
src/PluginDriver.hpp
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/*
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* DISTRHO Cardinal Plugin
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* Copyright (C) 2021 Filipe Coelho <falktx@falktx.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 3 of
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* the License, or any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* For a full copy of the GNU General Public License see the LICENSE file.
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*/
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#pragma once
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#include "PluginContext.hpp"
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START_NAMESPACE_DISTRHO
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// -----------------------------------------------------------------------------------------------------------
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struct CardinalAudioDevice : rack::audio::Device
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{
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CardinalBasePlugin* const fPlugin;
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CardinalAudioDevice(CardinalBasePlugin* const plugin)
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: fPlugin(plugin) {}
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std::string getName() override
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{
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return "Cardinal";
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}
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int getNumInputs() override
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{
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return DISTRHO_PLUGIN_NUM_INPUTS;
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}
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int getNumOutputs() override
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{
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return DISTRHO_PLUGIN_NUM_OUTPUTS;
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}
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int getBlockSize() override
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{
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return fPlugin->getBufferSize();
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}
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float getSampleRate() override
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{
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return fPlugin->getSampleRate();
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}
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std::set<int> getBlockSizes() override
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{
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return std::set<int>({ getBlockSize() });
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}
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std::set<float> getSampleRates() override
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{
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return std::set<float>({ getSampleRate() });
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}
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void setBlockSize(int) override {}
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void setSampleRate(float) override {}
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};
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// -----------------------------------------------------------------------------------------------------------
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struct CardinalAudioDriver : rack::audio::Driver
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{
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CardinalAudioDriver() {}
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std::string getName() override
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{
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return "Plugin Driver";
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}
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std::vector<int> getDeviceIds() override
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{
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return std::vector<int>({ 0 });
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}
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int getDefaultDeviceId() override
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{
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return 0;
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}
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std::string getDeviceName(int) override
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{
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return "Plugin Device";
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}
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int getDeviceNumInputs(int) override
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{
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return DISTRHO_PLUGIN_NUM_INPUTS;
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}
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int getDeviceNumOutputs(int) override
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{
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return DISTRHO_PLUGIN_NUM_OUTPUTS;
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}
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rack::audio::Device* subscribe(int, rack::audio::Port* const port) override
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{
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CardinalPluginContext* const pluginContext = reinterpret_cast<CardinalPluginContext*>(port->context);
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DISTRHO_SAFE_ASSERT_RETURN(pluginContext != nullptr, nullptr);
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CardinalBasePlugin* const plugin = reinterpret_cast<CardinalBasePlugin*>(pluginContext->plugin);
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DISTRHO_SAFE_ASSERT_RETURN(plugin != nullptr, nullptr);
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if (! plugin->canAssignDevice())
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throw rack::Exception("Plugin driver only allows one audio device to be used simultaneously");
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CardinalAudioDevice* const device = new CardinalAudioDevice(plugin);
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device->subscribe(port);
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if (plugin->isActive())
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device->onStartStream();
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plugin->assignDevice(device);
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return device;
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}
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void unsubscribe(int, rack::audio::Port* const port) override
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{
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CardinalAudioDevice* const device = reinterpret_cast<CardinalAudioDevice*>(port->device);
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DISTRHO_SAFE_ASSERT_RETURN(device != nullptr,);
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CardinalPluginContext* const pluginContext = reinterpret_cast<CardinalPluginContext*>(port->context);
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DISTRHO_SAFE_ASSERT_RETURN(pluginContext != nullptr,);
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CardinalBasePlugin* const plugin = reinterpret_cast<CardinalBasePlugin*>(pluginContext->plugin);
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DISTRHO_SAFE_ASSERT_RETURN(plugin != nullptr,);
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if (plugin->clearDevice(device))
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{
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device->onStopStream();
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device->unsubscribe(port);
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delete device;
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}
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}
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};
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// -----------------------------------------------------------------------------------------------------------
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struct CardinalMidiInputDevice : rack::midi::InputDevice
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{
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CardinalBasePlugin* const fPlugin;
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rack::midi::Message msg;
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CardinalMidiInputDevice(CardinalBasePlugin* const plugin)
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: fPlugin(plugin)
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{
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msg.bytes.reserve(0xff);
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}
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std::string getName() override
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{
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return "Cardinal";
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}
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void handleMessagesFromHost(const MidiEvent* const midiEvents, const uint32_t midiEventCount)
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{
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if (subscribed.size() == 0)
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return;
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for (uint32_t i=0; i<midiEventCount; ++i)
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{
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const MidiEvent& midiEvent(midiEvents[i]);
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const uint8_t* data;
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if (midiEvent.size > MidiEvent::kDataSize)
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{
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data = midiEvent.dataExt;
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msg.bytes.reserve(midiEvent.size);
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}
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else
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{
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data = midiEvent.data;
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}
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msg.frame = midiEvent.frame;
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std::memcpy(msg.bytes.data(), data, midiEvent.size);
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onMessage(msg);
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}
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}
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};
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// -----------------------------------------------------------------------------------------------------------
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struct CardinalMidiOutputDevice : rack::midi::OutputDevice
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{
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CardinalBasePlugin* const fPlugin;
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CardinalMidiOutputDevice(CardinalBasePlugin* const plugin)
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: fPlugin(plugin) {}
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std::string getName() override
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{
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return "Cardinal";
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}
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void sendMessage(const rack::midi::Message& message) override
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{
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}
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};
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// -----------------------------------------------------------------------------------------------------------
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struct CardinalMidiDriver : rack::midi::Driver
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{
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CardinalMidiDriver() {}
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std::string getName() override
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{
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return "Plugin Driver";
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}
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std::vector<int> getInputDeviceIds() override
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{
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return std::vector<int>({ 0 });
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}
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std::vector<int> getOutputDeviceIds() override
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{
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return std::vector<int>({ 0 });
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}
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int getDefaultInputDeviceId() override
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{
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return 0;
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}
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int getDefaultOutputDeviceId() override
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{
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return 0;
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}
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std::string getInputDeviceName(int) override
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{
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return "Plugin Device";
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}
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std::string getOutputDeviceName(int) override
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{
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return "Plugin Device";
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}
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rack::midi::InputDevice* subscribeInput(int, rack::midi::Input* const input) override
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{
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CardinalPluginContext* const pluginContext = reinterpret_cast<CardinalPluginContext*>(input->context);
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DISTRHO_SAFE_ASSERT_RETURN(pluginContext != nullptr, nullptr);
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CardinalBasePlugin* const plugin = reinterpret_cast<CardinalBasePlugin*>(pluginContext->plugin);
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DISTRHO_SAFE_ASSERT_RETURN(plugin != nullptr, nullptr);
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CardinalMidiInputDevice* const device = new CardinalMidiInputDevice(plugin);
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device->subscribe(input);
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plugin->addMidiInput(device);
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return device;
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}
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rack::midi::OutputDevice* subscribeOutput(int, rack::midi::Output* const output) override
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{
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CardinalPluginContext* const pluginContext = reinterpret_cast<CardinalPluginContext*>(output->context);
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DISTRHO_SAFE_ASSERT_RETURN(pluginContext != nullptr, nullptr);
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CardinalBasePlugin* const plugin = reinterpret_cast<CardinalBasePlugin*>(pluginContext->plugin);
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DISTRHO_SAFE_ASSERT_RETURN(plugin != nullptr, nullptr);
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CardinalMidiOutputDevice* const device = new CardinalMidiOutputDevice(plugin);
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device->subscribe(output);
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return device;
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}
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void unsubscribeInput(int, rack::midi::Input* const input) override
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{
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CardinalMidiInputDevice* const device = reinterpret_cast<CardinalMidiInputDevice*>(input->device);
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DISTRHO_SAFE_ASSERT_RETURN(device != nullptr,);
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CardinalPluginContext* const pluginContext = reinterpret_cast<CardinalPluginContext*>(input->context);
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DISTRHO_SAFE_ASSERT_RETURN(pluginContext != nullptr,);
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CardinalBasePlugin* const plugin = reinterpret_cast<CardinalBasePlugin*>(pluginContext->plugin);
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DISTRHO_SAFE_ASSERT_RETURN(plugin != nullptr,);
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plugin->removeMidiInput(device);
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device->unsubscribe(input);
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delete device;
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}
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void unsubscribeOutput(int, rack::midi::Output* const output) override
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{
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CardinalMidiOutputDevice* const device = reinterpret_cast<CardinalMidiOutputDevice*>(output->device);
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DISTRHO_SAFE_ASSERT_RETURN(device != nullptr,);
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device->unsubscribe(output);
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delete device;
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}
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};
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// -----------------------------------------------------------------------------------------------------------
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END_NAMESPACE_DISTRHO
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