mirror of
https://github.com/robbert-vdh/yabridge.git
synced 2026-05-07 03:50:11 +02:00
Robbert van der Helm
561 lines
24 KiB
C++
561 lines
24 KiB
C++
// yabridge: a Wine VST bridge
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// Copyright (C) 2020-2021 Robbert van der Helm
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) 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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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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#pragma once
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#include "../vst3.h"
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#include "plug-view-proxy.h"
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/**
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* Here we pass though all function calls made by the host to the Windows VST3
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* plugin. We had to deviate from yabridge's 'one-to-one passthrough' philosphy
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* by implementing a few caches for easily memoizable functions that got called
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* so many times by DAWs that it started to hurt performance. These are
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* documented near the bottom of this class.
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*/
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class Vst3PluginProxyImpl : public Vst3PluginProxy {
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public:
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Vst3PluginProxyImpl(Vst3PluginBridge& bridge,
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Vst3PluginProxy::ConstructArgs&& args);
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/**
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* When the reference count reaches zero and this destructor is called,
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* we'll send a request to the Wine plugin host to destroy the corresponding
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* object.
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*/
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~Vst3PluginProxyImpl();
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/**
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* We'll override the query interface to log queries for interfaces we do
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* not (yet) support.
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*/
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tresult PLUGIN_API queryInterface(const Steinberg::TUID _iid,
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void** obj) override;
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/**
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* Add a context menu created by a call to
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* `IComponentHandler3::createContextMenu` to our list of registered cotnext
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* menus. This way we can refer to it later when the plugin calls a function
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* on the proxy object we'll create for it.
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*/
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size_t register_context_menu(
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Steinberg::IPtr<Steinberg::Vst::IContextMenu> menu);
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/**
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* Unregister a context menu using the ID generated by a previous call to
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* `register_context_menu()`. This will release the context menu object
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* returned by the host.
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*/
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bool unregister_context_menu(size_t context_menu_id);
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/**
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* Clear our function call caches. We'll do this when the plugin calls
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* `IComponentHandler::restartComponent()`. These caching layers are
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* necessary to get decent performance in certain hosts because they will
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* call these functions repeatedly even when their values cannot change.
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*
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* See the bottom of this class for more information on what we're caching.
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*
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* @see clear_bus_cache
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* @see function_result_cache
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*/
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void clear_caches();
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// From `IAudioPresentationLatency`
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tresult PLUGIN_API
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setAudioPresentationLatencySamples(Steinberg::Vst::BusDirection dir,
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int32 busIndex,
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uint32 latencyInSamples) override;
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// From `IAudioProcessor`
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tresult PLUGIN_API
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setBusArrangements(Steinberg::Vst::SpeakerArrangement* inputs,
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int32 numIns,
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Steinberg::Vst::SpeakerArrangement* outputs,
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int32 numOuts) override;
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tresult PLUGIN_API
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getBusArrangement(Steinberg::Vst::BusDirection dir,
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int32 index,
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Steinberg::Vst::SpeakerArrangement& arr) override;
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tresult PLUGIN_API canProcessSampleSize(int32 symbolicSampleSize) override;
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uint32 PLUGIN_API getLatencySamples() override;
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tresult PLUGIN_API
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setupProcessing(Steinberg::Vst::ProcessSetup& setup) override;
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tresult PLUGIN_API setProcessing(TBool state) override;
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tresult PLUGIN_API process(Steinberg::Vst::ProcessData& data) override;
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uint32 PLUGIN_API getTailSamples() override;
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// From `IAutomationState`
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tresult PLUGIN_API setAutomationState(int32 state) override;
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// From `IComponent`
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tresult PLUGIN_API getControllerClassId(Steinberg::TUID classId) override;
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tresult PLUGIN_API setIoMode(Steinberg::Vst::IoMode mode) override;
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int32 PLUGIN_API getBusCount(Steinberg::Vst::MediaType type,
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Steinberg::Vst::BusDirection dir) override;
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tresult PLUGIN_API
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getBusInfo(Steinberg::Vst::MediaType type,
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Steinberg::Vst::BusDirection dir,
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int32 index,
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Steinberg::Vst::BusInfo& bus /*out*/) override;
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tresult PLUGIN_API
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getRoutingInfo(Steinberg::Vst::RoutingInfo& inInfo,
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Steinberg::Vst::RoutingInfo& outInfo /*out*/) override;
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tresult PLUGIN_API activateBus(Steinberg::Vst::MediaType type,
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Steinberg::Vst::BusDirection dir,
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int32 index,
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TBool state) override;
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tresult PLUGIN_API setActive(TBool state) override;
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tresult PLUGIN_API setState(Steinberg::IBStream* state) override;
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tresult PLUGIN_API getState(Steinberg::IBStream* state) override;
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// From `IConnectionPoint`
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tresult PLUGIN_API connect(IConnectionPoint* other) override;
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tresult PLUGIN_API disconnect(IConnectionPoint* other) override;
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tresult PLUGIN_API notify(Steinberg::Vst::IMessage* message) override;
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// From `IEditController`
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tresult PLUGIN_API setComponentState(Steinberg::IBStream* state) override;
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// `IEditController` also contains `getState()` and `setState()` functions.
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// These are identical to those defiend in `IComponent` and they're thus
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// handled in in the same function.
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int32 PLUGIN_API getParameterCount() override;
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tresult PLUGIN_API
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getParameterInfo(int32 paramIndex,
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Steinberg::Vst::ParameterInfo& info /*out*/) override;
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tresult PLUGIN_API
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getParamStringByValue(Steinberg::Vst::ParamID id,
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Steinberg::Vst::ParamValue valueNormalized /*in*/,
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Steinberg::Vst::String128 string /*out*/) override;
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tresult PLUGIN_API getParamValueByString(
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Steinberg::Vst::ParamID id,
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Steinberg::Vst::TChar* string /*in*/,
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Steinberg::Vst::ParamValue& valueNormalized /*out*/) override;
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Steinberg::Vst::ParamValue PLUGIN_API
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normalizedParamToPlain(Steinberg::Vst::ParamID id,
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Steinberg::Vst::ParamValue valueNormalized) override;
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Steinberg::Vst::ParamValue PLUGIN_API
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plainParamToNormalized(Steinberg::Vst::ParamID id,
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Steinberg::Vst::ParamValue plainValue) override;
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Steinberg::Vst::ParamValue PLUGIN_API
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getParamNormalized(Steinberg::Vst::ParamID id) override;
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tresult PLUGIN_API
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setParamNormalized(Steinberg::Vst::ParamID id,
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Steinberg::Vst::ParamValue value) override;
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tresult PLUGIN_API
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setComponentHandler(Steinberg::Vst::IComponentHandler* handler) override;
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Steinberg::IPlugView* PLUGIN_API
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createView(Steinberg::FIDString name) override;
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// From `IEditController2`
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tresult PLUGIN_API setKnobMode(Steinberg::Vst::KnobMode mode) override;
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tresult PLUGIN_API openHelp(TBool onlyCheck) override;
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tresult PLUGIN_API openAboutBox(TBool onlyCheck) override;
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// From `IEditControllerHostEditing`
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tresult PLUGIN_API
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beginEditFromHost(Steinberg::Vst::ParamID paramID) override;
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tresult PLUGIN_API
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endEditFromHost(Steinberg::Vst::ParamID paramID) override;
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// From `IInfoListener`
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tresult PLUGIN_API
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setChannelContextInfos(Steinberg::Vst::IAttributeList* list) override;
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// From `IKeyswitchController`
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int32 PLUGIN_API getKeyswitchCount(int32 busIndex, int16 channel) override;
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tresult PLUGIN_API
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getKeyswitchInfo(int32 busIndex,
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int16 channel,
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int32 keySwitchIndex,
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Steinberg::Vst::KeyswitchInfo& info /*out*/) override;
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// From `IMidiLearn`
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tresult PLUGIN_API
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onLiveMIDIControllerInput(int32 busIndex,
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int16 channel,
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Steinberg::Vst::CtrlNumber midiCC) override;
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// From `IMidiMapping`
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tresult PLUGIN_API
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getMidiControllerAssignment(int32 busIndex,
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int16 channel,
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Steinberg::Vst::CtrlNumber midiControllerNumber,
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Steinberg::Vst::ParamID& id /*out*/) override;
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// From `INoteExpressionController`
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int32 PLUGIN_API getNoteExpressionCount(int32 busIndex,
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int16 channel) override;
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tresult PLUGIN_API getNoteExpressionInfo(
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int32 busIndex,
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int16 channel,
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int32 noteExpressionIndex,
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Steinberg::Vst::NoteExpressionTypeInfo& info /*out*/) override;
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tresult PLUGIN_API getNoteExpressionStringByValue(
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int32 busIndex,
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int16 channel,
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Steinberg::Vst::NoteExpressionTypeID id,
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Steinberg::Vst::NoteExpressionValue valueNormalized /*in*/,
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Steinberg::Vst::String128 string /*out*/) override;
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tresult PLUGIN_API getNoteExpressionValueByString(
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int32 busIndex,
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int16 channel,
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Steinberg::Vst::NoteExpressionTypeID id,
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const Steinberg::Vst::TChar* string /*in*/,
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Steinberg::Vst::NoteExpressionValue& valueNormalized /*out*/) override;
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// From `INoteExpressionPhysicalUIMapping`
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tresult PLUGIN_API
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getPhysicalUIMapping(int32 busIndex,
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int16 channel,
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Steinberg::Vst::PhysicalUIMapList& list) override;
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// From `IParameterFunctionName`
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tresult PLUGIN_API
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getParameterIDFromFunctionName(Steinberg::Vst::UnitID unitID,
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Steinberg::FIDString functionName,
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Steinberg::Vst::ParamID& paramID) override;
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// From `IPluginBase`
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tresult PLUGIN_API initialize(FUnknown* context) override;
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tresult PLUGIN_API terminate() override;
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// From `IPrefetchableSupport`
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tresult PLUGIN_API getPrefetchableSupport(
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Steinberg::Vst::PrefetchableSupport& prefetchable /*out*/) override;
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// From `IProcessContextRequirements`
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uint32 PLUGIN_API getProcessContextRequirements() override;
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// From `IProgramListData`
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tresult PLUGIN_API
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programDataSupported(Steinberg::Vst::ProgramListID listId) override;
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tresult PLUGIN_API getProgramData(Steinberg::Vst::ProgramListID listId,
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int32 programIndex,
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Steinberg::IBStream* data) override;
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tresult PLUGIN_API setProgramData(Steinberg::Vst::ProgramListID listId,
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int32 programIndex,
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Steinberg::IBStream* data) override;
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// From `IUnitData`
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tresult PLUGIN_API
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unitDataSupported(Steinberg::Vst::UnitID unitId) override;
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tresult PLUGIN_API getUnitData(Steinberg::Vst::UnitID unitId,
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Steinberg::IBStream* data) override;
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tresult PLUGIN_API setUnitData(Steinberg::Vst::UnitID unitId,
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Steinberg::IBStream* data) override;
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// From `IUnitInfo`
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int32 PLUGIN_API getUnitCount() override;
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tresult PLUGIN_API
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getUnitInfo(int32 unitIndex,
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Steinberg::Vst::UnitInfo& info /*out*/) override;
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int32 PLUGIN_API getProgramListCount() override;
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tresult PLUGIN_API
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getProgramListInfo(int32 listIndex,
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Steinberg::Vst::ProgramListInfo& info /*out*/) override;
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tresult PLUGIN_API
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getProgramName(Steinberg::Vst::ProgramListID listId,
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int32 programIndex,
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Steinberg::Vst::String128 name /*out*/) override;
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tresult PLUGIN_API
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getProgramInfo(Steinberg::Vst::ProgramListID listId,
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int32 programIndex,
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Steinberg::Vst::CString attributeId /*in*/,
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Steinberg::Vst::String128 attributeValue /*out*/) override;
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tresult PLUGIN_API
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hasProgramPitchNames(Steinberg::Vst::ProgramListID listId,
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int32 programIndex) override;
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tresult PLUGIN_API
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getProgramPitchName(Steinberg::Vst::ProgramListID listId,
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int32 programIndex,
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int16 midiPitch,
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Steinberg::Vst::String128 name /*out*/) override;
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Steinberg::Vst::UnitID PLUGIN_API getSelectedUnit() override;
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tresult PLUGIN_API selectUnit(Steinberg::Vst::UnitID unitId) override;
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tresult PLUGIN_API
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getUnitByBus(Steinberg::Vst::MediaType type,
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Steinberg::Vst::BusDirection dir,
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int32 busIndex,
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int32 channel,
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Steinberg::Vst::UnitID& unitId /*out*/) override;
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tresult PLUGIN_API setUnitProgramData(int32 listOrUnitId,
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int32 programIndex,
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Steinberg::IBStream* data) override;
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// From `IXmlRepresentationController`
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tresult PLUGIN_API
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getXmlRepresentationStream(Steinberg::Vst::RepresentationInfo& info /*in*/,
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Steinberg::IBStream* stream /*out*/) override;
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/**
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* The component handler the host passed to us during
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* `IEditController::setComponentHandler()`. When the plugin makes a
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* callback on a component handler proxy object, we'll pass the call through
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* to this object.
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*/
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Steinberg::IPtr<Steinberg::Vst::IComponentHandler> component_handler;
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/**
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* If the host places a proxy between two objects in
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* `IConnectionPoint::connect()`, we'll first try to bypass this proxy to
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* avoid a lot of edge cases with plugins that use these notifications from
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* the GUI thread. We'll do this by exchanging messages containing the
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* connected object's instance ID. If we can successfully exchange instance
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* IDs this way, we'll still connect the objects directly on the Wine plugin
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* host side. So far this is only needed for Ardour.
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*/
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std::optional<size_t> connected_instance_id;
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/**
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* If we cannot manage to bypass the connection proxy as mentioned in the
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* docstring of `connected_instance_id`, then we'll store the host's
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* connection point proxy here and we'll proxy that proxy, if that makes any
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* sense.
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*/
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Steinberg::IPtr<Steinberg::Vst::IConnectionPoint> connection_point_proxy;
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/**
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* An unmanaged, raw pointer to the `IPlugView` instance returned in our
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* implementation of `IEditController::createView()`. We need this to handle
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* `IPlugFrame::resizeView()`, since that expects a pointer to the view that
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* gets resized.
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*
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* XXX: This approach of course won't work with multiple views, but the SDK
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* currently only defines a single type of view so that shouldn't be an
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* issue
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*/
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Vst3PlugViewProxyImpl* last_created_plug_view = nullptr;
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/**
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* Whether `last_created_plug_view` is currently active. This field is
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* written to from `Vst3PlugViewProxyImpl`'s constructor and destructor.
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*/
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std::atomic_bool last_created_plug_view_active = false;
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/**
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* A pointer to a context menu returned by the host as a response to a call
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* to `IComponentHandler3::createContextMenu`, as well as all targets we've
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* created for it. This way we can drop both all at once.
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*/
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struct ContextMenu {
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ContextMenu(Steinberg::IPtr<Steinberg::Vst::IContextMenu> menu);
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Steinberg::IPtr<Steinberg::Vst::IContextMenu> menu;
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/**
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* All targets we pass to `IContextMenu::addItem`. We'll store them per
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* item tag, so we can drop them together with the menu. We probably
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* don't have to use smart pointers for this, but the docs are missing a
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* lot of details o how this should be implemented and there's no
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* example implementation around.
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*/
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std::map<int32, Steinberg::IPtr<YaContextMenuTarget>> targets;
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};
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/**
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* All context menus created by this object through
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* `IComponentHandler3::createContextMenu()`. We'll generate a unique
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* identifier for each context menu just like we do for plugin objects. When
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* the plugin drops the context menu object, we'll also remove the
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* corresponding entry for this map causing the original pointer returned by
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* the host to get dropped a well.
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*
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* @see Vst3PluginProxyImpl::register_context_menu
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* @see Vst3PluginProxyImpl::unregister_context_menu
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*/
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std::map<size_t, ContextMenu> context_menus;
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std::mutex context_menus_mutex;
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// The following pointers are cast from `host_context` if
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// `IPluginBase::initialize()` has been called
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Steinberg::FUnknownPtr<Steinberg::Vst::IHostApplication> host_application;
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Steinberg::FUnknownPtr<Steinberg::Vst::IPlugInterfaceSupport>
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plug_interface_support;
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// The following pointers are cast from `component_handler` if
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// `IEditController::setComponentHandler()` has been called
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Steinberg::FUnknownPtr<Steinberg::Vst::IComponentHandler2>
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component_handler_2;
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Steinberg::FUnknownPtr<Steinberg::Vst::IComponentHandler3>
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component_handler_3;
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Steinberg::FUnknownPtr<Steinberg::Vst::IComponentHandlerBusActivation>
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component_handler_bus_activation;
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Steinberg::FUnknownPtr<Steinberg::Vst::IProgress> progress;
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Steinberg::FUnknownPtr<Steinberg::Vst::IUnitHandler> unit_handler;
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Steinberg::FUnknownPtr<Steinberg::Vst::IUnitHandler2> unit_handler_2;
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private:
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/**
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* Clear the bus count and information cache. We need this cache for REAPER
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* as it makes `num_inputs + num_outputs + 2` function calls to retrieve
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* this information every single processing cycle. For plugins with a lot of
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* outputs this really adds up. According to the VST3 workflow diagrams bus
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* information cannot change anymore once `IAudioProcessor::setProcessing()`
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* has been called, but REAPER doesn't quite follow the spec here and it
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* will set bus arrangements and activate the plugin only after it's called
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* `IAudioProcessor::setProcessing()`. Because of that we'll have to
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* manually flush this cache when the stores information potentially becomes
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* invalid.
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*
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* @see processing_bus_cache
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*/
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void clear_bus_cache();
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/**
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* If we have an active `IPlugView` instance, try to use the mutual
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* recursion mechanism so that callbacks made by the plugin can be handled
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* on this same thread. In case this is an audio processor with a separate
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* edit controller, we'll also check if the object we're connected to has an
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* active `IPlugView` instance. When there's no active `IPlugView` instance,
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* we'll just send the event message like normal. This is needed to be able
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* to handle function calls made by the host (which is mostly relevant for
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* REAPER) on the GUI thread, when the plugin makes a callback to the host
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* that should also be handled on that same thread (context menus and
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* plugin-driven resizes).
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*/
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template <typename T>
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typename T::Response maybe_send_mutually_recursive_message(
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const T& object) {
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if (last_created_plug_view_active) {
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return last_created_plug_view->send_mutually_recursive_message(
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std::move(object));
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} else if (connected_instance_id) {
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// We should also be able to handle the above situation when a
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// `setState()` on a processor triggers a resize coming from the
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// edit controller. To do that, we'll also check if the connected
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// instance has an active plug view.
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Vst3PluginProxyImpl& other_instance =
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bridge.plugin_proxies.at(*connected_instance_id).get();
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if (other_instance.last_created_plug_view_active) {
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return other_instance.last_created_plug_view
|
|
->send_mutually_recursive_message(std::move(object));
|
|
}
|
|
}
|
|
|
|
return bridge.send_message(std::move(object));
|
|
}
|
|
|
|
Vst3PluginBridge& bridge;
|
|
|
|
/**
|
|
* An host context if we get passed one through `IPluginBase::initialize()`.
|
|
* We'll read which interfaces it supports and we'll then create a proxy
|
|
* object that supports those same interfaces. This should be the same for
|
|
* all plugin instances so we should not have to store it here separately,
|
|
* but for the sake of correctness we will.
|
|
*/
|
|
Steinberg::IPtr<Steinberg::FUnknown> host_context;
|
|
|
|
/**
|
|
* We'll periodically synchronize the Wine host's audio thread priority with
|
|
* that of the host. Since the overhead from doing so does add up, we'll
|
|
* only do this every once in a while.
|
|
*/
|
|
time_t last_audio_thread_priority_synchronization = 0;
|
|
|
|
/**
|
|
* Used to assign unique identifiers to context menus created by
|
|
* `IComponentHandler3::CreateContextMenu`.
|
|
*
|
|
* @related Vst3PluginProxyImpl::register_context_menu
|
|
*/
|
|
std::atomic_size_t current_context_menu_id;
|
|
|
|
/**
|
|
* We'll reuse this process data object and simply fill the objects
|
|
* contained with new data to avoid allocations during audio processing.
|
|
*/
|
|
YaProcessData process_data;
|
|
|
|
// Caches
|
|
|
|
/**
|
|
* A cache for `IAudioProcessor::getBusCount()` and
|
|
* `IAudioProcessor::getBusInfo()`. We'll memoize the function calls for
|
|
* these two functions while processing audio (since at that time these
|
|
* values should be immutable until the plugin tells the host that this
|
|
* information has changed).
|
|
*
|
|
* @see processing_bus_cache
|
|
*/
|
|
struct BusInfoCache {
|
|
std::map<
|
|
std::tuple<Steinberg::Vst::MediaType, Steinberg::Vst::BusDirection>,
|
|
int32>
|
|
bus_count;
|
|
std::map<std::tuple<Steinberg::Vst::MediaType,
|
|
Steinberg::Vst::BusDirection,
|
|
int32>,
|
|
Steinberg::Vst::BusInfo>
|
|
bus_info;
|
|
};
|
|
|
|
/**
|
|
* This cache originally intended because REAPER would query this
|
|
* information at the start of every audio processing cycle. This would hurt
|
|
* performance considerably if a plugin has many input or output busses.
|
|
* This issue has since been fixed, but some DAWs still query this
|
|
* information repeatedly so it seems like a good idea to keep the caches
|
|
* in.
|
|
*
|
|
* Since this information is immutable during audio processing, this cache
|
|
* will only be available at those times.
|
|
*
|
|
* @see clear_bus_cache
|
|
*/
|
|
std::optional<BusInfoCache> processing_bus_cache;
|
|
std::mutex processing_bus_cache_mutex;
|
|
|
|
/**
|
|
* A cache for several function calls that should be safe to cache since
|
|
* their values shouldn't change at run time. We'll memoize these function
|
|
* calls until the plugin tells the host that parameter information has
|
|
* changed.
|
|
*
|
|
* @see function_result_cache
|
|
*/
|
|
struct FunctionResultCache {
|
|
/**
|
|
* Memoizes `IEditController::getParameterCount()`.
|
|
*/
|
|
std::optional<int32> parameter_count;
|
|
/**
|
|
* Memoizes `IEditController::getParameterInfo()`.
|
|
*/
|
|
std::map<int32, Steinberg::Vst::ParameterInfo> parameter_info;
|
|
};
|
|
|
|
/**
|
|
* A cache for several frequently called functions that should not change
|
|
* values unless the plugin calls `IComponentHandler::restartComponent()`.
|
|
* This used to be necessary because in some situations REAPER would query
|
|
* this information many times times per second even though it cannot change
|
|
* unless the plugin tells the host that it has. This issue has since been
|
|
* fixed, but we'll keep it in because some other hosts also query this
|
|
* information more than once.
|
|
*
|
|
* The cache will be cleared when the plugin tells the host that some of its
|
|
* parameter values have changed.
|
|
*
|
|
* @see clear_caches
|
|
*/
|
|
FunctionResultCache function_result_cache;
|
|
std::mutex function_result_cache_mutex;
|
|
};
|