/* * Carla Plugin Host * Copyright (C) 2011-2017 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_BACKEND_H_INCLUDED #define CARLA_BACKEND_H_INCLUDED #include "CarlaDefines.h" #ifdef CARLA_PROPER_CPP11_SUPPORT # include #else # include #endif #define STR_MAX 0xFF #ifdef __cplusplus # define CARLA_BACKEND_START_NAMESPACE namespace CarlaBackend { # define CARLA_BACKEND_END_NAMESPACE } # define CARLA_BACKEND_USE_NAMESPACE using namespace CarlaBackend; # include /* Start namespace */ CARLA_BACKEND_START_NAMESPACE #endif /*! * @defgroup CarlaBackendAPI Carla Backend API * * The Carla Backend API. * * These are the base definitions for everything in the Carla backend code. * @{ */ /* ------------------------------------------------------------------------------------------------------------ * Carla Backend API (base definitions) */ /*! * Maximum default number of loadable plugins. */ static const uint MAX_DEFAULT_PLUGINS = 99; /*! * Maximum number of loadable plugins in rack mode. */ static const uint MAX_RACK_PLUGINS = 16; /*! * Maximum number of loadable plugins in patchbay mode. */ static const uint MAX_PATCHBAY_PLUGINS = 255; /*! * Maximum default number of parameters allowed. * @see ENGINE_OPTION_MAX_PARAMETERS */ static const uint MAX_DEFAULT_PARAMETERS = 200; /* ------------------------------------------------------------------------------------------------------------ * Engine Driver Device Hints */ /*! * @defgroup EngineDriverHints Engine Driver Device Hints * * Various engine driver device hints. * @see CarlaEngine::getHints(), CarlaEngine::getDriverDeviceInfo() and carla_get_engine_driver_device_info() * @{ */ /*! * Engine driver device has custom control-panel. */ static const uint ENGINE_DRIVER_DEVICE_HAS_CONTROL_PANEL = 0x1; /*! * Engine driver device can use a triple-buffer (3 number of periods instead of the usual 2). * @see ENGINE_OPTION_AUDIO_NUM_PERIODS */ static const uint ENGINE_DRIVER_DEVICE_CAN_TRIPLE_BUFFER = 0x2; /*! * Engine driver device can change buffer-size on the fly. * @see ENGINE_OPTION_AUDIO_BUFFER_SIZE */ static const uint ENGINE_DRIVER_DEVICE_VARIABLE_BUFFER_SIZE = 0x4; /*! * Engine driver device can change sample-rate on the fly. * @see ENGINE_OPTION_AUDIO_SAMPLE_RATE */ static const uint ENGINE_DRIVER_DEVICE_VARIABLE_SAMPLE_RATE = 0x8; /** @} */ /* ------------------------------------------------------------------------------------------------------------ * Plugin Hints */ /*! * @defgroup PluginHints Plugin Hints * * Various plugin hints. * @see CarlaPlugin::getHints() and carla_get_plugin_info() * @{ */ /*! * Plugin is a bridge. * This hint is required because "bridge" itself is not a plugin type. */ static const uint PLUGIN_IS_BRIDGE = 0x001; /*! * Plugin is hard real-time safe. */ static const uint PLUGIN_IS_RTSAFE = 0x002; /*! * Plugin is a synth (produces sound). */ static const uint PLUGIN_IS_SYNTH = 0x004; /*! * Plugin has its own custom UI. * @see CarlaPlugin::showCustomUI() and carla_show_custom_ui() */ static const uint PLUGIN_HAS_CUSTOM_UI = 0x008; /*! * Plugin can use internal Dry/Wet control. */ static const uint PLUGIN_CAN_DRYWET = 0x010; /*! * Plugin can use internal Volume control. */ static const uint PLUGIN_CAN_VOLUME = 0x020; /*! * Plugin can use internal (Stereo) Balance controls. */ static const uint PLUGIN_CAN_BALANCE = 0x040; /*! * Plugin can use internal (Mono) Panning control. */ static const uint PLUGIN_CAN_PANNING = 0x080; /*! * Plugin needs a constant, fixed-size audio buffer. */ static const uint PLUGIN_NEEDS_FIXED_BUFFERS = 0x100; /*! * Plugin needs to receive all UI events in the main thread. */ static const uint PLUGIN_NEEDS_UI_MAIN_THREAD = 0x200; /*! * Plugin uses 1 program per MIDI channel. * @note: Only used in some internal plugins and gig+sf2 files. */ static const uint PLUGIN_USES_MULTI_PROGS = 0x400; /*! * Plugin can make use of inline display API. */ static const uint PLUGIN_HAS_INLINE_DISPLAY = 0x800; /** @} */ /* ------------------------------------------------------------------------------------------------------------ * Plugin Options */ /*! * @defgroup PluginOptions Plugin Options * * Various plugin options. * @see CarlaPlugin::getOptionsAvailable(), CarlaPlugin::getOptionsEnabled(), carla_get_plugin_info() and carla_set_option() * @{ */ /*! * Use constant/fixed-size audio buffers. */ static const uint PLUGIN_OPTION_FIXED_BUFFERS = 0x001; /*! * Force mono plugin as stereo. */ static const uint PLUGIN_OPTION_FORCE_STEREO = 0x002; /*! * Map MIDI programs to plugin programs. */ static const uint PLUGIN_OPTION_MAP_PROGRAM_CHANGES = 0x004; /*! * Use chunks to save and restore data instead of parameter values. */ static const uint PLUGIN_OPTION_USE_CHUNKS = 0x008; /*! * Send MIDI control change events. */ static const uint PLUGIN_OPTION_SEND_CONTROL_CHANGES = 0x010; /*! * Send MIDI channel pressure events. */ static const uint PLUGIN_OPTION_SEND_CHANNEL_PRESSURE = 0x020; /*! * Send MIDI note after-touch events. */ static const uint PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH = 0x040; /*! * Send MIDI pitch-bend events. */ static const uint PLUGIN_OPTION_SEND_PITCHBEND = 0x080; /*! * Send MIDI all-sounds/notes-off events, single note-offs otherwise. */ static const uint PLUGIN_OPTION_SEND_ALL_SOUND_OFF = 0x100; /*! * Send MIDI bank/program changes. * @note: This option conflicts with PLUGIN_OPTION_MAP_PROGRAM_CHANGES and cannot be used at the same time. */ static const uint PLUGIN_OPTION_SEND_PROGRAM_CHANGES = 0x200; /** @} */ /* ------------------------------------------------------------------------------------------------------------ * Parameter Hints */ /*! * @defgroup ParameterHints Parameter Hints * * Various parameter hints. * @see CarlaPlugin::getParameterData() and carla_get_parameter_data() * @{ */ /*! * Parameter value is boolean. * It's always at either minimum or maximum value. */ static const uint PARAMETER_IS_BOOLEAN = 0x001; /*! * Parameter value is integer. */ static const uint PARAMETER_IS_INTEGER = 0x002; /*! * Parameter value is logarithmic. */ static const uint PARAMETER_IS_LOGARITHMIC = 0x004; /*! * Parameter is enabled. * It can be viewed, changed and stored. */ static const uint PARAMETER_IS_ENABLED = 0x010; /*! * Parameter is automable (real-time safe). */ static const uint PARAMETER_IS_AUTOMABLE = 0x020; /*! * Parameter is read-only. * It cannot be changed. */ static const uint PARAMETER_IS_READ_ONLY = 0x040; /*! * Parameter needs sample rate to work. * Value and ranges are multiplied by sample rate on usage and divided by sample rate on save. */ static const uint PARAMETER_USES_SAMPLERATE = 0x100; /*! * Parameter uses scale points to define internal values in a meaningful way. */ static const uint PARAMETER_USES_SCALEPOINTS = 0x200; /*! * Parameter uses custom text for displaying its value. * @see CarlaPlugin::getParameterText() and carla_get_parameter_text() */ static const uint PARAMETER_USES_CUSTOM_TEXT = 0x400; /** @} */ /* ------------------------------------------------------------------------------------------------------------ * Patchbay Port Hints */ /*! * @defgroup PatchbayPortHints Patchbay Port Hints * * Various patchbay port hints. * @{ */ /*! * Patchbay port is input. * When this hint is not set, port is assumed to be output. */ static const uint PATCHBAY_PORT_IS_INPUT = 0x1; /*! * Patchbay port is of Audio type. */ static const uint PATCHBAY_PORT_TYPE_AUDIO = 0x2; /*! * Patchbay port is of CV type (Control Voltage). */ static const uint PATCHBAY_PORT_TYPE_CV = 0x4; /*! * Patchbay port is of MIDI type. */ static const uint PATCHBAY_PORT_TYPE_MIDI = 0x8; /** @} */ /* ------------------------------------------------------------------------------------------------------------ * Custom Data Types */ /*! * @defgroup CustomDataTypes Custom Data Types * * These types define how the value in the CustomData struct is stored. * @see CustomData::type * @{ */ /*! * Boolean string type URI. * Only "true" and "false" are valid values. */ static const char* const CUSTOM_DATA_TYPE_BOOLEAN = "http://kxstudio.sf.net/ns/carla/boolean"; /*! * Chunk type URI. */ static const char* const CUSTOM_DATA_TYPE_CHUNK = "http://kxstudio.sf.net/ns/carla/chunk"; /*! * Property type URI. */ static const char* const CUSTOM_DATA_TYPE_PROPERTY = "http://kxstudio.sf.net/ns/carla/property"; /*! * String type URI. */ static const char* const CUSTOM_DATA_TYPE_STRING = "http://kxstudio.sf.net/ns/carla/string"; /** @} */ /* ------------------------------------------------------------------------------------------------------------ * Custom Data Keys */ /*! * @defgroup CustomDataKeys Custom Data Keys * * Pre-defined keys used internally in Carla. * @see CustomData::key * @{ */ /*! * UI position key. */ static const char* const CUSTOM_DATA_KEY_UI_POSITION = "CarlaUiPosition"; /*! * UI size key. */ static const char* const CUSTOM_DATA_KEY_UI_SIZE = "CarlaUiSize"; /*! * UI visible key. */ static const char* const CUSTOM_DATA_KEY_UI_VISIBLE = "CarlaUiVisible"; /** @} */ /* ------------------------------------------------------------------------------------------------------------ * Binary Type */ /*! * The binary type of a plugin. */ typedef enum { /*! * Null binary type. */ BINARY_NONE = 0, /*! * POSIX 32bit binary. */ BINARY_POSIX32 = 1, /*! * POSIX 64bit binary. */ BINARY_POSIX64 = 2, /*! * Windows 32bit binary. */ BINARY_WIN32 = 3, /*! * Windows 64bit binary. */ BINARY_WIN64 = 4, /*! * Other binary type. */ BINARY_OTHER = 5 } BinaryType; /* ------------------------------------------------------------------------------------------------------------ * Plugin Type */ /*! * Plugin type. * Some files are handled as if they were plugins. */ typedef enum { /*! * Null plugin type. */ PLUGIN_NONE = 0, /*! * Internal plugin. */ PLUGIN_INTERNAL = 1, /*! * LADSPA plugin. */ PLUGIN_LADSPA = 2, /*! * DSSI plugin. */ PLUGIN_DSSI = 3, /*! * LV2 plugin. */ PLUGIN_LV2 = 4, /*! * VST2 plugin. */ PLUGIN_VST2 = 5, /*! * VST3 plugin. * @note Windows and MacOS only */ PLUGIN_VST3 = 6, /*! * AU plugin. * @note MacOS only */ PLUGIN_AU = 7, /*! * GIG file. */ PLUGIN_GIG = 8, /*! * SF2 file (SoundFont). */ PLUGIN_SF2 = 9, /*! * SFZ file. */ PLUGIN_SFZ = 10, /*! * JACK application. */ PLUGIN_JACK = 11 } PluginType; /* ------------------------------------------------------------------------------------------------------------ * Plugin Category */ /*! * Plugin category, which describes the functionality of a plugin. */ typedef enum { /*! * Null plugin category. */ PLUGIN_CATEGORY_NONE = 0, /*! * A synthesizer or generator. */ PLUGIN_CATEGORY_SYNTH = 1, /*! * A delay or reverb. */ PLUGIN_CATEGORY_DELAY = 2, /*! * An equalizer. */ PLUGIN_CATEGORY_EQ = 3, /*! * A filter. */ PLUGIN_CATEGORY_FILTER = 4, /*! * A distortion plugin. */ PLUGIN_CATEGORY_DISTORTION = 5, /*! * A 'dynamic' plugin (amplifier, compressor, gate, etc). */ PLUGIN_CATEGORY_DYNAMICS = 6, /*! * A 'modulator' plugin (chorus, flanger, phaser, etc). */ PLUGIN_CATEGORY_MODULATOR = 7, /*! * An 'utility' plugin (analyzer, converter, mixer, etc). */ PLUGIN_CATEGORY_UTILITY = 8, /*! * Miscellaneous plugin (used to check if the plugin has a category). */ PLUGIN_CATEGORY_OTHER = 9 } PluginCategory; /* ------------------------------------------------------------------------------------------------------------ * Parameter Type */ /*! * Plugin parameter type. */ typedef enum { /*! * Null parameter type. */ PARAMETER_UNKNOWN = 0, /*! * Input parameter. */ PARAMETER_INPUT = 1, /*! * Ouput parameter. */ PARAMETER_OUTPUT = 2 } ParameterType; /* ------------------------------------------------------------------------------------------------------------ * Internal Parameter Index */ /*! * Special parameters used internally in Carla. * Plugins do not know about their existence. */ typedef enum { /*! * Null parameter. */ PARAMETER_NULL = -1, #ifndef BUILD_BRIDGE /*! * Active parameter, boolean type. * Default is 'false'. */ PARAMETER_ACTIVE = -2, /*! * Dry/Wet parameter. * Range 0.0...1.0; default is 1.0. */ PARAMETER_DRYWET = -3, /*! * Volume parameter. * Range 0.0...1.27; default is 1.0. */ PARAMETER_VOLUME = -4, /*! * Stereo Balance-Left parameter. * Range -1.0...1.0; default is -1.0. */ PARAMETER_BALANCE_LEFT = -5, /*! * Stereo Balance-Right parameter. * Range -1.0...1.0; default is 1.0. */ PARAMETER_BALANCE_RIGHT = -6, /*! * Mono Panning parameter. * Range -1.0...1.0; default is 0.0. */ PARAMETER_PANNING = -7, /*! * MIDI Control channel, integer type. * Range -1...15 (-1 = off). */ PARAMETER_CTRL_CHANNEL = -8, #endif /*! * Max value, defined only for convenience. */ PARAMETER_MAX = -9 } InternalParameterIndex; /* ------------------------------------------------------------------------------------------------------------ * Engine Callback Opcode */ /*! * Engine callback opcodes. * Front-ends must never block indefinitely during a callback. * @see EngineCallbackFunc, CarlaEngine::setCallback() and carla_set_engine_callback() */ typedef enum { /*! * Debug. * This opcode is undefined and used only for testing purposes. */ ENGINE_CALLBACK_DEBUG = 0, /*! * A plugin has been added. * @a pluginId Plugin Id * @a valueStr Plugin name */ ENGINE_CALLBACK_PLUGIN_ADDED = 1, /*! * A plugin has been removed. * @a pluginId Plugin Id */ ENGINE_CALLBACK_PLUGIN_REMOVED = 2, /*! * A plugin has been renamed. * @a pluginId Plugin Id * @a valueStr New plugin name */ ENGINE_CALLBACK_PLUGIN_RENAMED = 3, /*! * A plugin has become unavailable. * @a pluginId Plugin Id * @a valueStr Related error string */ ENGINE_CALLBACK_PLUGIN_UNAVAILABLE = 4, /*! * A parameter value has changed. * @a pluginId Plugin Id * @a value1 Parameter index * @a value3 New parameter value */ ENGINE_CALLBACK_PARAMETER_VALUE_CHANGED = 5, /*! * A parameter default has changed. * @a pluginId Plugin Id * @a value1 Parameter index * @a value3 New default value */ ENGINE_CALLBACK_PARAMETER_DEFAULT_CHANGED = 6, #ifndef BUILD_BRIDGE /*! * A parameter's MIDI CC has changed. * @a pluginId Plugin Id * @a value1 Parameter index * @a value2 New MIDI CC */ ENGINE_CALLBACK_PARAMETER_MIDI_CC_CHANGED = 7, /*! * A parameter's MIDI channel has changed. * @a pluginId Plugin Id * @a value1 Parameter index * @a value2 New MIDI channel */ ENGINE_CALLBACK_PARAMETER_MIDI_CHANNEL_CHANGED = 8, /*! * A plugin option has changed. * @a pluginId Plugin Id * @a value1 Option * @a value2 New on/off state (1 for on, 0 for off) * @see PluginOptions */ ENGINE_CALLBACK_OPTION_CHANGED = 9, #endif /*! * The current program of a plugin has changed. * @a pluginId Plugin Id * @a value1 New program index */ ENGINE_CALLBACK_PROGRAM_CHANGED = 10, /*! * The current MIDI program of a plugin has changed. * @a pluginId Plugin Id * @a value1 New MIDI program index */ ENGINE_CALLBACK_MIDI_PROGRAM_CHANGED = 11, /*! * A plugin's custom UI state has changed. * @a pluginId Plugin Id * @a value1 New state, as follows: * 0: UI is now hidden * 1: UI is now visible * -1: UI has crashed and should not be shown again */ ENGINE_CALLBACK_UI_STATE_CHANGED = 12, /*! * A note has been pressed. * @a pluginId Plugin Id * @a value1 Channel * @a value2 Note * @a value3 Velocity */ ENGINE_CALLBACK_NOTE_ON = 13, /*! * A note has been released. * @a pluginId Plugin Id * @a value1 Channel * @a value2 Note */ ENGINE_CALLBACK_NOTE_OFF = 14, /*! * A plugin needs update. * @a pluginId Plugin Id */ ENGINE_CALLBACK_UPDATE = 15, /*! * A plugin's data/information has changed. * @a pluginId Plugin Id */ ENGINE_CALLBACK_RELOAD_INFO = 16, /*! * A plugin's parameters have changed. * @a pluginId Plugin Id */ ENGINE_CALLBACK_RELOAD_PARAMETERS = 17, /*! * A plugin's programs have changed. * @a pluginId Plugin Id */ ENGINE_CALLBACK_RELOAD_PROGRAMS = 18, /*! * A plugin state has changed. * @a pluginId Plugin Id */ ENGINE_CALLBACK_RELOAD_ALL = 19, #ifndef BUILD_BRIDGE /*! * A patchbay client has been added. * @a pluginId Client Id * @a value1 Client icon * @a value2 Plugin Id (-1 if not a plugin) * @a valueStr Client name * @see PatchbayIcon */ ENGINE_CALLBACK_PATCHBAY_CLIENT_ADDED = 20, /*! * A patchbay client has been removed. * @a pluginId Client Id */ ENGINE_CALLBACK_PATCHBAY_CLIENT_REMOVED = 21, /*! * A patchbay client has been renamed. * @a pluginId Client Id * @a valueStr New client name */ ENGINE_CALLBACK_PATCHBAY_CLIENT_RENAMED = 22, /*! * A patchbay client data has changed. * @a pluginId Client Id * @a value1 New icon * @a value2 New plugin Id (-1 if not a plugin) * @see PatchbayIcon */ ENGINE_CALLBACK_PATCHBAY_CLIENT_DATA_CHANGED = 23, /*! * A patchbay port has been added. * @a pluginId Client Id * @a value1 Port Id * @a value2 Port hints * @a valueStr Port name * @see PatchbayPortHints */ ENGINE_CALLBACK_PATCHBAY_PORT_ADDED = 24, /*! * A patchbay port has been removed. * @a pluginId Client Id * @a value1 Port Id */ ENGINE_CALLBACK_PATCHBAY_PORT_REMOVED = 25, /*! * A patchbay port has been renamed. * @a pluginId Client Id * @a value1 Port Id * @a valueStr New port name */ ENGINE_CALLBACK_PATCHBAY_PORT_RENAMED = 26, /*! * A patchbay connection has been added. * @a pluginId Connection Id * @a valueStr Out group and port plus in group and port, in "og:op:ig:ip" syntax. */ ENGINE_CALLBACK_PATCHBAY_CONNECTION_ADDED = 27, /*! * A patchbay connection has been removed. * @a pluginId Connection Id */ ENGINE_CALLBACK_PATCHBAY_CONNECTION_REMOVED = 28, #endif /*! * Engine started. * @a value1 Process mode * @a value2 Transport mode * @a valuestr Engine driver * @see EngineProcessMode * @see EngineTransportMode */ ENGINE_CALLBACK_ENGINE_STARTED = 29, /*! * Engine stopped. */ ENGINE_CALLBACK_ENGINE_STOPPED = 30, /*! * Engine process mode has changed. * @a value1 New process mode * @see EngineProcessMode */ ENGINE_CALLBACK_PROCESS_MODE_CHANGED = 31, /*! * Engine transport mode has changed. * @a value1 New transport mode * @see EngineTransportMode */ ENGINE_CALLBACK_TRANSPORT_MODE_CHANGED = 32, /*! * Engine buffer-size changed. * @a value1 New buffer size */ ENGINE_CALLBACK_BUFFER_SIZE_CHANGED = 33, /*! * Engine sample-rate changed. * @a value3 New sample rate */ ENGINE_CALLBACK_SAMPLE_RATE_CHANGED = 34, /*! * NSM callback. * (Work in progress, values are not defined yet) */ ENGINE_CALLBACK_NSM = 35, /*! * Idle frontend. * This is used by the engine during long operations that might block the frontend, * giving it the possibility to idle while the operation is still in place. */ ENGINE_CALLBACK_IDLE = 36, /*! * Show a message as information. * @a valueStr The message */ ENGINE_CALLBACK_INFO = 37, /*! * Show a message as an error. * @a valueStr The message */ ENGINE_CALLBACK_ERROR = 38, /*! * The engine has crashed or malfunctioned and will no longer work. */ ENGINE_CALLBACK_QUIT = 39 } EngineCallbackOpcode; /* ------------------------------------------------------------------------------------------------------------ * Engine Option */ /*! * Engine options. * @see CarlaEngine::getOptions(), CarlaEngine::setOption() and carla_set_engine_option() */ typedef enum { /*! * Debug. * This option is undefined and used only for testing purposes. */ ENGINE_OPTION_DEBUG = 0, /*! * Set the engine processing mode. * Default is ENGINE_PROCESS_MODE_MULTIPLE_CLIENTS on Linux and ENGINE_PROCESS_MODE_PATCHBAY for all other OSes. * @see EngineProcessMode */ ENGINE_OPTION_PROCESS_MODE = 1, /*! * Set the engine transport mode. * Default is ENGINE_TRANSPORT_MODE_JACK on Linux and ENGINE_TRANSPORT_MODE_INTERNAL for all other OSes. * @see EngineTransportMode */ ENGINE_OPTION_TRANSPORT_MODE = 2, /*! * Force mono plugins as stereo, by running 2 instances at the same time. * Default is false, but always true when process mode is ENGINE_PROCESS_MODE_CONTINUOUS_RACK. * @note Not supported by all plugins * @see PLUGIN_OPTION_FORCE_STEREO */ ENGINE_OPTION_FORCE_STEREO = 3, /*! * Use plugin bridges whenever possible. * Default is no, EXPERIMENTAL. */ ENGINE_OPTION_PREFER_PLUGIN_BRIDGES = 4, /*! * Use UI bridges whenever possible, otherwise UIs will be directly handled in the main backend thread. * Default is yes. */ ENGINE_OPTION_PREFER_UI_BRIDGES = 5, /*! * Make custom plugin UIs always-on-top. * Default is yes. */ ENGINE_OPTION_UIS_ALWAYS_ON_TOP = 6, /*! * Maximum number of parameters allowed. * Default is MAX_DEFAULT_PARAMETERS. */ ENGINE_OPTION_MAX_PARAMETERS = 7, /*! * Timeout value for how much to wait for UI bridges to respond, in milliseconds. * Default is 4000 (4 seconds). */ ENGINE_OPTION_UI_BRIDGES_TIMEOUT = 8, /*! * Number of audio periods. * Default is 2. */ ENGINE_OPTION_AUDIO_NUM_PERIODS = 9, /*! * Audio buffer size. * Default is 512. */ ENGINE_OPTION_AUDIO_BUFFER_SIZE = 10, /*! * Audio sample rate. * Default is 44100. */ ENGINE_OPTION_AUDIO_SAMPLE_RATE = 11, /*! * Audio device (within a driver). * Default unset. */ ENGINE_OPTION_AUDIO_DEVICE = 12, /*! * Set path used for a specific plugin type. * Uses value as the plugin format, valueStr as actual path. * @see PluginType */ ENGINE_OPTION_PLUGIN_PATH = 13, /*! * Set path to the binary files. * Default unset. * @note Must be set for plugin and UI bridges to work */ ENGINE_OPTION_PATH_BINARIES = 14, /*! * Set path to the resource files. * Default unset. * @note Must be set for some internal plugins to work */ ENGINE_OPTION_PATH_RESOURCES = 15, /*! * Prevent bad plugin and UI behaviour. * @note: Linux only */ ENGINE_OPTION_PREVENT_BAD_BEHAVIOUR = 16, /*! * Set frontend winId, used to define as parent window for plugin UIs. */ ENGINE_OPTION_FRONTEND_WIN_ID = 17, /*! * Capture console output into debug callbacks. */ ENGINE_OPTION_DEBUG_CONSOLE_OUTPUT = 18 } EngineOption; /* ------------------------------------------------------------------------------------------------------------ * Engine Process Mode */ /*! * Engine process mode. * @see ENGINE_OPTION_PROCESS_MODE */ typedef enum { /*! * Single client mode. * Inputs and outputs are added dynamically as needed by plugins. */ ENGINE_PROCESS_MODE_SINGLE_CLIENT = 0, /*! * Multiple client mode. * It has 1 master client + 1 client per plugin. */ ENGINE_PROCESS_MODE_MULTIPLE_CLIENTS = 1, /*! * Single client, 'rack' mode. * Processes plugins in order of Id, with forced stereo always on. */ ENGINE_PROCESS_MODE_CONTINUOUS_RACK = 2, /*! * Single client, 'patchbay' mode. */ ENGINE_PROCESS_MODE_PATCHBAY = 3, /*! * Special mode, used in plugin-bridges only. */ ENGINE_PROCESS_MODE_BRIDGE = 4 } EngineProcessMode; /* ------------------------------------------------------------------------------------------------------------ * Engine Transport Mode */ /*! * Engine transport mode. * @see ENGINE_OPTION_TRANSPORT_MODE */ typedef enum { /*! * Internal transport mode. */ ENGINE_TRANSPORT_MODE_INTERNAL = 0, /*! * Transport from JACK. * Only available if driver name is "JACK". */ ENGINE_TRANSPORT_MODE_JACK = 1, /*! * Transport from host, used when Carla is a plugin. */ ENGINE_TRANSPORT_MODE_PLUGIN = 2, /*! * Special mode, used in plugin-bridges only. */ ENGINE_TRANSPORT_MODE_BRIDGE = 3 } EngineTransportMode; /* ------------------------------------------------------------------------------------------------------------ * File Callback Opcode */ /*! * File callback opcodes. * Front-ends must always block-wait for user input. * @see FileCallbackFunc, CarlaEngine::setFileCallback() and carla_set_file_callback() */ typedef enum { /*! * Debug. * This opcode is undefined and used only for testing purposes. */ FILE_CALLBACK_DEBUG = 0, /*! * Open file or folder. */ FILE_CALLBACK_OPEN = 1, /*! * Save file or folder. */ FILE_CALLBACK_SAVE = 2 } FileCallbackOpcode; /* ------------------------------------------------------------------------------------------------------------ * Patchbay Icon */ /*! * The icon of a patchbay client/group. */ enum PatchbayIcon { /*! * Generic application icon. * Used for all non-plugin clients that don't have a specific icon. */ PATCHBAY_ICON_APPLICATION = 0, /*! * Plugin icon. * Used for all plugin clients that don't have a specific icon. */ PATCHBAY_ICON_PLUGIN = 1, /*! * Hardware icon. * Used for hardware (audio or MIDI) clients. */ PATCHBAY_ICON_HARDWARE = 2, /*! * Carla icon. * Used for the main app. */ PATCHBAY_ICON_CARLA = 3, /*! * DISTRHO icon. * Used for DISTRHO based plugins. */ PATCHBAY_ICON_DISTRHO = 4, /*! * File icon. * Used for file type plugins (like GIG and SF2). */ PATCHBAY_ICON_FILE = 5 }; /* ------------------------------------------------------------------------------------------------------------ * Carla Backend API (C stuff) */ /*! * Engine callback function. * Front-ends must never block indefinitely during a callback. * @see EngineCallbackOpcode, CarlaEngine::setCallback() and carla_set_engine_callback() */ typedef void (*EngineCallbackFunc)(void* ptr, EngineCallbackOpcode action, uint pluginId, int value1, int value2, float value3, const char* valueStr); /*! * File callback function. * @see FileCallbackOpcode */ typedef const char* (*FileCallbackFunc)(void* ptr, FileCallbackOpcode action, bool isDir, const char* title, const char* filter); /*! * Parameter data. */ typedef struct { /*! * This parameter type. */ ParameterType type; /*! * This parameter hints. * @see ParameterHints */ uint hints; /*! * Index as seen by Carla. */ int32_t index; /*! * Real index as seen by plugins. */ int32_t rindex; /*! * Currently mapped MIDI CC. * A value lower than 0 means invalid or unused. * Maximum allowed value is 119 (0x77). */ int16_t midiCC; /*! * Currently mapped MIDI channel. * Counts from 0 to 15. */ uint8_t midiChannel; } ParameterData; /*! * Parameter ranges. */ typedef struct { /*! * Default value. */ float def; /*! * Minimum value. */ float min; /*! * Maximum value. */ float max; /*! * Regular, single step value. */ float step; /*! * Small step value. */ float stepSmall; /*! * Large step value. */ float stepLarge; #ifdef __cplusplus /*! * Fix the default value within range. */ void fixDefault() noexcept { fixValue(def); } /*! * Fix a value within range. */ void fixValue(float& value) const noexcept { if (value < min) value = min; else if (value > max) value = max; } /*! * Get a fixed value within range. */ const float& getFixedValue(const float& value) const noexcept { if (value <= min) return min; if (value >= max) return max; return value; } /*! * Get a value normalized to 0.0<->1.0. */ float getNormalizedValue(const float& value) const noexcept { const float normValue((value - min) / (max - min)); if (normValue <= 0.0f) return 0.0f; if (normValue >= 1.0f) return 1.0f; return normValue; } /*! * Get a value normalized to 0.0<->1.0, fixed within range. */ float getFixedAndNormalizedValue(const float& value) const noexcept { if (value <= min) return 0.0f; if (value >= max) return 1.0f; const float normValue((value - min) / (max - min)); if (normValue <= 0.0f) return 0.0f; if (normValue >= 1.0f) return 1.0f; return normValue; } /*! * Get a proper value previously normalized to 0.0<->1.0. */ float getUnnormalizedValue(const float& value) const noexcept { if (value <= 0.0f) return min; if (value >= 1.0f) return max; return value * (max - min) + min; } /*! * Get a logarithmic value previously normalized to 0.0<->1.0. */ float getUnnormalizedLogValue(const float& value) const noexcept { if (value <= 0.0f) return min; if (value >= 1.0f) return max; return min * std::pow(max/min, value); } #endif /* __cplusplus */ } ParameterRanges; /*! * MIDI Program data. */ typedef struct { /*! * MIDI bank. */ uint32_t bank; /*! * MIDI program. */ uint32_t program; /*! * MIDI program name. */ const char* name; } MidiProgramData; /*! * Custom data, used for saving key:value 'dictionaries'. */ typedef struct { /*! * Value type, in URI form. * @see CustomDataTypes */ const char* type; /*! * Key. * @see CustomDataKeys */ const char* key; /*! * Value. */ const char* value; #ifdef __cplusplus /*! * Check if valid. */ bool isValid() const noexcept { if (type == nullptr || type[0] == '\0') return false; if (key == nullptr || key [0] == '\0') return false; if (value == nullptr) return false; return true; } #endif /* __cplusplus */ } CustomData; /*! * Engine driver device information. */ typedef struct { /*! * This driver device hints. * @see EngineDriverHints */ uint hints; /*! * Available buffer sizes. * Terminated with 0. */ const uint32_t* bufferSizes; /*! * Available sample rates. * Terminated with 0.0. */ const double* sampleRates; } EngineDriverDeviceInfo; /** @} */ #ifdef __cplusplus /* Forward declarations of commonly used Carla classes */ class CarlaEngine; class CarlaEngineClient; class CarlaPlugin; /* End namespace */ CARLA_BACKEND_END_NAMESPACE #endif #endif /* CARLA_BACKEND_H_INCLUDED */