/* * Carla Plugin Host * Copyright (C) 2011-2018 Filipe Coelho * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * For a full copy of the GNU General Public License see the doc/GPL.txt file. */ #ifndef CARLA_PLUGIN_HPP_INCLUDED #define CARLA_PLUGIN_HPP_INCLUDED #include "CarlaBackend.h" // ----------------------------------------------------------------------- // Avoid including extra libs here typedef void* lo_message; typedef struct _NativePluginDescriptor NativePluginDescriptor; struct LADSPA_RDF_Descriptor; // ----------------------------------------------------------------------- CARLA_BACKEND_START_NAMESPACE #if 0 } /* Fix editor indentation */ #endif // ----------------------------------------------------------------------- /*! * @defgroup CarlaPluginAPI Carla Plugin API * * The Carla Plugin API. * @{ */ class CarlaEngineAudioPort; class CarlaEngineCVPort; class CarlaEngineEventPort; struct CarlaStateSave; // ----------------------------------------------------------------------- /*! * Carla Backend base plugin class * * This is the base class for all available plugin types available in Carla Backend. * All virtual calls are implemented in this class as fallback (except reload and process), * so it's safe to only override needed calls. * * @see PluginType */ class CARLA_API CarlaPlugin { protected: /*! * This is the constructor of the base plugin class. * * @param engine The engine which this plugin belongs to, must not be null * @param id The 'id' of this plugin, must be between 0 and CarlaEngine::maxPluginNumber() */ CarlaPlugin(CarlaEngine* const engine, const uint id); public: /*! * This is the destructor of the base plugin class. */ virtual ~CarlaPlugin(); // ------------------------------------------------------------------- // Information (base) /*! * Get the plugin's type (a subclass of CarlaPlugin). * * @note Plugin bridges will return their respective plugin type, there is no plugin type such as "bridge". * To check if a plugin is a bridge use: * @code * if (getHints() & PLUGIN_IS_BRIDGE) * ... * @endcode */ virtual PluginType getType() const noexcept = 0; /*! * Get the plugin's id (as passed in the constructor). * * @see setId() */ uint getId() const noexcept; /*! * Get the plugin's hints. * * @see PluginHints */ uint getHints() const noexcept; /*! * Get the plugin's options (currently in use). * * @see PluginOptions, getOptionsAvailable() and setOption() */ uint getOptionsEnabled() const noexcept; /*! * Check if the plugin is enabled. * When a plugin is disabled, it will never be processed or managed in any way. * * @see setEnabled() */ bool isEnabled() const noexcept; /*! * Get the plugin's internal name. * This name is unique within all plugins in an engine. * * @see getRealName() and setName() */ const char* getName() const noexcept; /*! * Get the currently loaded DLL filename for this plugin. * (Sound kits return their exact filename). */ const char* getFilename() const noexcept; /*! * Get the plugins's icon name. */ const char* getIconName() const noexcept; /*! * Get the plugin's category (delay, filter, synth, etc). */ virtual PluginCategory getCategory() const noexcept; /*! * Get the plugin's native unique Id. * May return 0 on plugin types that don't support Ids. */ virtual int64_t getUniqueId() const noexcept; /*! * Get the plugin's latency, in sample frames. */ virtual uint32_t getLatencyInFrames() const noexcept; // ------------------------------------------------------------------- // Information (count) /*! * Get the number of audio inputs. */ uint32_t getAudioInCount() const noexcept; /*! * Get the number of audio outputs. */ uint32_t getAudioOutCount() const noexcept; /*! * Get the number of CV inputs. */ uint32_t getCVInCount() const noexcept; /*! * Get the number of CV outputs. */ uint32_t getCVOutCount() const noexcept; /*! * Get the number of MIDI inputs. */ virtual uint32_t getMidiInCount() const noexcept; /*! * Get the number of MIDI outputs. */ virtual uint32_t getMidiOutCount() const noexcept; /*! * Get the number of parameters. * To know the number of parameter inputs and outputs separately use getParameterCountInfo() instead. */ uint32_t getParameterCount() const noexcept; /*! * Get the number of scalepoints for parameter @a parameterId. */ virtual uint32_t getParameterScalePointCount(const uint32_t parameterId) const noexcept; /*! * Get the number of programs. */ uint32_t getProgramCount() const noexcept; /*! * Get the number of MIDI programs. */ uint32_t getMidiProgramCount() const noexcept; /*! * Get the number of custom data sets. */ uint32_t getCustomDataCount() const noexcept; // ------------------------------------------------------------------- // Information (current data) /*! * Get the current program number (-1 if unset). * * @see setProgram() */ int32_t getCurrentProgram() const noexcept; /*! * Get the current MIDI program number (-1 if unset). * * @see setMidiProgram() * @see setMidiProgramById() */ int32_t getCurrentMidiProgram() const noexcept; /*! * Get the parameter data of @a parameterId. */ const ParameterData& getParameterData(const uint32_t parameterId) const noexcept; /*! * Get the parameter ranges of @a parameterId. */ const ParameterRanges& getParameterRanges(const uint32_t parameterId) const noexcept; /*! * Check if parameter @a parameterId is of output type. */ bool isParameterOutput(const uint32_t parameterId) const noexcept; /*! * Get the MIDI program at @a index. * * @see getMidiProgramName() */ const MidiProgramData& getMidiProgramData(const uint32_t index) const noexcept; /*! * Get the custom data set at @a index. * * @see getCustomDataCount() and setCustomData() */ const CustomData& getCustomData(const uint32_t index) const noexcept; /*! * Get the complete plugin chunk data into @a dataPtr. * * @note Make sure to verify the plugin supports chunks before calling this function! * @return The size of the chunk or 0 if invalid. * * @see setChunkData() */ virtual std::size_t getChunkData(void** const dataPtr) noexcept; // ------------------------------------------------------------------- // Information (per-plugin data) /*! * Get the plugin available options. * * @see PluginOptions, getOptions() and setOption() */ virtual uint getOptionsAvailable() const noexcept; /*! * Get the current parameter value of @a parameterId. */ virtual float getParameterValue(const uint32_t parameterId) const noexcept; /*! * Get the scalepoint @a scalePointId value of the parameter @a parameterId. */ virtual float getParameterScalePointValue(const uint32_t parameterId, const uint32_t scalePointId) const noexcept; /*! * Get the plugin's label (URI for LV2 plugins). */ virtual void getLabel(char* const strBuf) const noexcept; /*! * Get the plugin's maker. */ virtual void getMaker(char* const strBuf) const noexcept; /*! * Get the plugin's copyright/license. */ virtual void getCopyright(char* const strBuf) const noexcept; /*! * Get the plugin's (real) name. * * @see getName() and setName() */ virtual void getRealName(char* const strBuf) const noexcept; /*! * Get the name of the parameter @a parameterId. */ virtual void getParameterName(const uint32_t parameterId, char* const strBuf) const noexcept; /*! * Get the symbol of the parameter @a parameterId. */ virtual void getParameterSymbol(const uint32_t parameterId, char* const strBuf) const noexcept; /*! * Get the custom text of the parameter @a parameterId. * @see PARAMETER_USES_CUSTOM_TEXT */ virtual void getParameterText(const uint32_t parameterId, char* const strBuf) noexcept; /*! * Get the unit of the parameter @a parameterId. */ virtual void getParameterUnit(const uint32_t parameterId, char* const strBuf) const noexcept; /*! * Get the scalepoint @a scalePointId label of the parameter @a parameterId. */ virtual void getParameterScalePointLabel(const uint32_t parameterId, const uint32_t scalePointId, char* const strBuf) const noexcept; /*! * Get the current parameter value of @a parameterId. * @a parameterId can be negative to allow internal parameters. * @see InternalParametersIndex */ float getInternalParameterValue(const int32_t parameterId) const noexcept; /*! * Get the name of the program at @a index. */ void getProgramName(const uint32_t index, char* const strBuf) const noexcept; /*! * Get the name of the MIDI program at @a index. * * @see getMidiProgramInfo() */ void getMidiProgramName(const uint32_t index, char* const strBuf) const noexcept; /*! * Get information about the plugin's parameter count. * This is used to check how many input, output and total parameters are available. * * @note Some parameters might not be input or output (ie, invalid). * * @see getParameterCount() */ void getParameterCountInfo(uint32_t& ins, uint32_t& outs) const noexcept; // ------------------------------------------------------------------- // Set data (state) /*! * Tell the plugin to prepare for save. */ virtual void prepareForSave(); /*! * Reset all possible parameters. */ virtual void resetParameters() noexcept; /*! * Randomize all possible parameters. */ virtual void randomizeParameters() noexcept; /*! * Get the plugin's save state. * The plugin will automatically call prepareForSave() if requested. * * @see loadStateSave() */ const CarlaStateSave& getStateSave(const bool callPrepareForSave = true); /*! * Get the plugin's save state. * * @see getStateSave() */ void loadStateSave(const CarlaStateSave& stateSave); /*! * Save the current plugin state to @a filename. * * @see loadStateFromFile() */ bool saveStateToFile(const char* const filename); /*! * Save the plugin state from @a filename. * * @see saveStateToFile() */ bool loadStateFromFile(const char* const filename); /*! * Export this plugin as LV2. */ bool exportAsLV2(const char* const lv2path); // ------------------------------------------------------------------- // Set data (internal stuff) /*! * Set the plugin's id to @a newId. * * @see getId() * @note RT call */ virtual void setId(const uint newId) noexcept; /*! * Set the plugin's name to @a newName. * * @see getName() and getRealName() */ virtual void setName(const char* const newName); /*! * Set a plugin's option. * * @see getOptions() and getOptionsAvailable() */ virtual void setOption(const uint option, const bool yesNo, const bool sendCallback); /*! * Enable or disable the plugin according to @a yesNo. * When a plugin is disabled, it will never be processed or managed in any way. * * @see isEnabled() */ void setEnabled(const bool yesNo) noexcept; /*! * Set plugin as active according to @a active. * * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback */ void setActive(const bool active, const bool sendOsc, const bool sendCallback) noexcept; #ifndef BUILD_BRIDGE /*! * Set the plugin's dry/wet signal value to @a value. * @a value must be between 0.0 and 1.0. * * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback */ void setDryWet(const float value, const bool sendOsc, const bool sendCallback) noexcept; /*! * Set the plugin's output volume to @a value. * @a value must be between 0.0 and 1.27. * * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback */ void setVolume(const float value, const bool sendOsc, const bool sendCallback) noexcept; /*! * Set the plugin's output left balance value to @a value. * @a value must be between -1.0 and 1.0. * * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback * * @note Pure-Stereo plugins only! */ void setBalanceLeft(const float value, const bool sendOsc, const bool sendCallback) noexcept; /*! * Set the plugin's output right balance value to @a value. * @a value must be between -1.0 and 1.0. * * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback * * @note Pure-Stereo plugins only! */ void setBalanceRight(const float value, const bool sendOsc, const bool sendCallback) noexcept; /*! * Set the plugin's output panning value to @a value. * @a value must be between -1.0 and 1.0. * * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback * * @note Force-Stereo plugins only! */ void setPanning(const float value, const bool sendOsc, const bool sendCallback) noexcept; /*! * Overloaded functions, to be called from within RT context only. */ void setDryWetRT(const float value) noexcept; void setVolumeRT(const float value) noexcept; void setBalanceLeftRT(const float value) noexcept; void setBalanceRightRT(const float value) noexcept; void setPanningRT(const float value) noexcept; #endif /*! * Set the plugin's midi control channel. * * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback */ virtual void setCtrlChannel(const int8_t channel, const bool sendOsc, const bool sendCallback) noexcept; // ------------------------------------------------------------------- // Set data (plugin-specific stuff) /*! * Set a plugin's parameter value. * * @param parameterId The parameter to change * @param value The new parameter value, must be within the parameter's range * @param sendGui Send message change to plugin's custom GUI, if any * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback * * @see getParameterValue() */ virtual void setParameterValue(const uint32_t parameterId, const float value, const bool sendGui, const bool sendOsc, const bool sendCallback) noexcept; /*! * Overloaded function, to be called from within RT context only. */ virtual void setParameterValueRT(const uint32_t parameterId, const float value) noexcept; /*! * Set a plugin's parameter value, including internal parameters. * @a rindex can be negative to allow internal parameters change (as defined in InternalParametersIndex). * * @see setParameterValue() * @see setActive() * @see setDryWet() * @see setVolume() * @see setBalanceLeft() * @see setBalanceRight() */ void setParameterValueByRealIndex(const int32_t rindex, const float value, const bool sendGui, const bool sendOsc, const bool sendCallback) noexcept; /*! * Set parameter's @a parameterId MIDI channel to @a channel. * @a channel must be between 0 and 15. */ virtual void setParameterMidiChannel(const uint32_t parameterId, const uint8_t channel, const bool sendOsc, const bool sendCallback) noexcept; /*! * Set parameter's @a parameterId MIDI CC to @a cc. * @a cc must be between 0 and 119 (0x77), or -1 for invalid. */ virtual void setParameterMidiCC(const uint32_t parameterId, const int16_t cc, const bool sendOsc, const bool sendCallback) noexcept; /*! * Add a custom data set. * If @a key already exists, its current value will be swapped with @a value. * * @param type Type of data used in @a value. * @param key A key identifing this data set. * @param value The value of the data set, of type @a type. * @param sendGui Send message change to plugin's custom GUI, if any * * @see getCustomDataCount() and getCustomData() */ virtual void setCustomData(const char* const type, const char* const key, const char* const value, const bool sendGui); /*! * Set the complete chunk data as @a data. * * @see getChunkData() * * @note Make sure to verify the plugin supports chunks before calling this function */ virtual void setChunkData(const void* const data, const std::size_t dataSize); /*! * Change the current plugin program to @a index. * * If @a index is negative the plugin's program will be considered unset. * The plugin's default parameter values will be updated when this function is called. * * @param index New program index to use * @param sendGui Send message change to plugin's custom GUI, if any * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback */ virtual void setProgram(const int32_t index, const bool sendGui, const bool sendOsc, const bool sendCallback, const bool doingInit = false) noexcept; /*! * Change the current MIDI plugin program to @a index. * * If @a index is negative the plugin's program will be considered unset. * The plugin's default parameter values will be updated when this function is called. * * @param index New program index to use * @param sendGui Send message change to plugin's custom GUI, if any * @param sendOsc Send message change over OSC * @param sendCallback Send message change to registered callback */ virtual void setMidiProgram(const int32_t index, const bool sendGui, const bool sendOsc, const bool sendCallback, const bool doingInit = false) noexcept; /*! * This is an overloaded call to setMidiProgram(). * It changes the current MIDI program using @a bank and @a program values instead of index. */ void setMidiProgramById(const uint32_t bank, const uint32_t program, const bool sendGui, const bool sendOsc, const bool sendCallback) noexcept; /*! * Overloaded functions, to be called from within RT context only. */ virtual void setProgramRT(const uint32_t index) noexcept; virtual void setMidiProgramRT(const uint32_t index) noexcept; // ------------------------------------------------------------------- // Plugin state /*! * Reload the plugin's entire state (including programs). * The plugin will be disabled during this call. */ virtual void reload() = 0; /*! * Reload the plugin's programs state. */ virtual void reloadPrograms(const bool doInit); // ------------------------------------------------------------------- // Plugin processing protected: /*! * Plugin activate call. */ virtual void activate() noexcept; /*! * Plugin activate call. */ virtual void deactivate() noexcept; public: /*! * Plugin process call. */ virtual void process(const float** const audioIn, float** const audioOut, const float** const cvIn, float** const cvOut, const uint32_t frames) = 0; /*! * Tell the plugin the current buffer size changed. */ virtual void bufferSizeChanged(const uint32_t newBufferSize); /*! * Tell the plugin the current sample rate changed. */ virtual void sampleRateChanged(const double newSampleRate); /*! * Tell the plugin the current offline mode changed. */ virtual void offlineModeChanged(const bool isOffline); // ------------------------------------------------------------------- // Misc /*! * Idle function (non-UI), called at regular intervals. * @note: This function is NOT called from the main thread. */ virtual void idle(); /*! * Try to lock the plugin's master mutex. * @param forcedOffline When true, always locks and returns true */ bool tryLock(const bool forcedOffline) noexcept; /*! * Unlock the plugin's master mutex. */ void unlock() noexcept; // ------------------------------------------------------------------- // Plugin buffers /*! * Initialize all RT buffers of the plugin. */ virtual void initBuffers() const noexcept; /*! * Delete and clear all RT buffers. */ virtual void clearBuffers() noexcept; // ------------------------------------------------------------------- // OSC stuff #ifndef BUILD_BRIDGE /*! * Register this plugin to the engine's OSC client (controller or bridge). * TODO */ void registerToOscClient() noexcept; #endif /*! * Handle an OSC message. * FIXME */ virtual void handleOscMessage(const char* const method, const int argc, const void* const argv, const char* const types, const lo_message msg); // ------------------------------------------------------------------- // MIDI events /*! * Send a single midi note to be processed in the next audio callback. * A note with 0 velocity means note-off. * @note Non-RT call */ void sendMidiSingleNote(const uint8_t channel, const uint8_t note, const uint8_t velo, const bool sendGui, const bool sendOsc, const bool sendCallback); #ifndef BUILD_BRIDGE /*! * Send all midi notes off to the host callback. * This doesn't send the actual MIDI All-Notes-Off event, but 128 note-offs instead (IFF ctrlChannel is valid). * @note RT call */ void sendMidiAllNotesOffToCallback(); #endif // ------------------------------------------------------------------- // UI Stuff /*! * Show (or hide) the plugin's custom UI according to @a yesNo. * This function is always called from the main thread. */ virtual void showCustomUI(const bool yesNo); /*! * UI idle function, called at regular intervals. * This function is only called from the main thread if PLUGIN_NEEDS_UI_MAIN_THREAD is set. * @note This function may sometimes be called even if the UI is not visible yet. */ virtual void uiIdle(); /*! * Tell the UI a parameter has changed. * @see uiIdle */ virtual void uiParameterChange(const uint32_t index, const float value) noexcept; /*! * Tell the UI the current program has changed. * @see uiIdle */ virtual void uiProgramChange(const uint32_t index) noexcept; /*! * Tell the UI the current midi program has changed. * @see uiIdle */ virtual void uiMidiProgramChange(const uint32_t index) noexcept; /*! * Tell the UI a note has been pressed. * @see uiIdle */ virtual void uiNoteOn(const uint8_t channel, const uint8_t note, const uint8_t velo) noexcept; /*! * Tell the UI a note has been released. * @see uiIdle */ virtual void uiNoteOff(const uint8_t channel, const uint8_t note) noexcept; // ------------------------------------------------------------------- // Helper functions /*! * Check if the plugin can run in rack mode. */ bool canRunInRack() const noexcept; /*! * Get the plugin's engine, as passed in the constructor. */ CarlaEngine* getEngine() const noexcept; /*! * Get the plugin's engine client. */ CarlaEngineClient* getEngineClient() const noexcept; /*! * Get a plugin's audio input port. */ CarlaEngineAudioPort* getAudioInPort(const uint32_t index) const noexcept; /*! * Get a plugin's audio output port. */ CarlaEngineAudioPort* getAudioOutPort(const uint32_t index) const noexcept; /*! * Get a plugin's CV input port. */ CarlaEngineCVPort* getCVInPort(const uint32_t index) const noexcept; /*! * Get a plugin's CV output port. */ CarlaEngineCVPort* getCVOutPort(const uint32_t index) const noexcept; /*! * Get the plugin's default event input port. */ CarlaEngineEventPort* getDefaultEventInPort() const noexcept; /*! * Get the plugin's default event output port. */ CarlaEngineEventPort* getDefaultEventOutPort() const noexcept; /*! * Get the plugin's type native handle. * This will be LADSPA_Handle, LV2_Handle, etc. */ virtual void* getNativeHandle() const noexcept; /*! * Get the plugin's type native descriptor. * This will be LADSPA_Descriptor, DSSI_Descriptor, LV2_Descriptor, AEffect, etc. */ virtual const void* getNativeDescriptor() const noexcept; /*! * Get the plugin UI bridge process Id. */ virtual uintptr_t getUiBridgeProcessId() const noexcept; // ------------------------------------------------------------------- /*! * Get the plugin's patchbay nodeId. * @see setPatchbayNodeId() */ uint32_t getPatchbayNodeId() const noexcept; /*! * Set the plugin's patchbay nodeId. * @see getPatchbayNodeId() */ void setPatchbayNodeId(const uint32_t nodeId) noexcept; // ------------------------------------------------------------------- // Plugin initializers /*! * Get a plugin's binary type. * This is always BINARY_NATIVE unless the plugin is a bridge. */ virtual BinaryType getBinaryType() const noexcept { return BINARY_NATIVE; } /*! * Handy function required by CarlaEngine::clonePlugin(). */ virtual const void* getExtraStuff() const noexcept { return nullptr; } #ifndef DOXYGEN struct Initializer { CarlaEngine* const engine; const uint id; const char* const filename; const char* const name; const char* const label; const int64_t uniqueId; const uint options; // see PluginOptions }; static CarlaPlugin* newNative(const Initializer& init); static CarlaPlugin* newBridge(const Initializer& init, const BinaryType btype, const PluginType ptype, const char* const bridgeBinary); static CarlaPlugin* newLADSPA(const Initializer& init, const LADSPA_RDF_Descriptor* const rdfDescriptor); static CarlaPlugin* newDSSI(const Initializer& init); static CarlaPlugin* newLV2(const Initializer& init); static CarlaPlugin* newVST2(const Initializer& init); static CarlaPlugin* newFluidSynth(const Initializer& init, const bool use16Outs); static CarlaPlugin* newLinuxSampler(const Initializer& init, const char* const format, const bool use16Outs); static CarlaPlugin* newFileGIG(const Initializer& init, const bool use16Outs); static CarlaPlugin* newFileSF2(const Initializer& init, const bool use16Outs); static CarlaPlugin* newFileSFZ(const Initializer& init); static CarlaPlugin* newJackApp(const Initializer& init); #endif // ------------------------------------------------------------------- protected: /*! * Internal data, for CarlaPlugin subclasses only. */ struct ProtectedData; ProtectedData* const pData; // ------------------------------------------------------------------- // Internal helper functions /*! * Call LV2 restore. */ virtual void restoreLV2State() noexcept; /*! * Give plugin bridges a change to update their custom data sets. */ virtual void waitForBridgeSaveSignal() noexcept; // ------------------------------------------------------------------- // Helper classes /*! * Fully disable plugin in scope and also its engine client. * May wait-block on constructor for plugin process to end. */ class ScopedDisabler { public: ScopedDisabler(CarlaPlugin* const plugin) noexcept; ~ScopedDisabler() noexcept; private: CarlaPlugin* const fPlugin; bool fWasEnabled; CARLA_PREVENT_HEAP_ALLOCATION CARLA_DECLARE_NON_COPY_CLASS(ScopedDisabler) }; /*! * Lock the plugin's own run/process call. * Plugin will still work as normal, but output only silence. * On destructor needsReset flag might be set if the plugin might have missed some events. */ class ScopedSingleProcessLocker { public: ScopedSingleProcessLocker(CarlaPlugin* const plugin, const bool block) noexcept; ~ScopedSingleProcessLocker() noexcept; private: CarlaPlugin* const fPlugin; const bool fBlock; CARLA_PREVENT_HEAP_ALLOCATION CARLA_DECLARE_NON_COPY_CLASS(ScopedSingleProcessLocker) }; CARLA_DECLARE_NON_COPY_CLASS(CarlaPlugin) }; /**@}*/ // ----------------------------------------------------------------------- CARLA_BACKEND_END_NAMESPACE #endif // CARLA_PLUGIN_HPP_INCLUDED