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Diffstat (limited to 'ext/ui.lv2/ui.h')
| -rw-r--r-- | ext/ui.lv2/ui.h | 312 |
1 files changed, 0 insertions, 312 deletions
diff --git a/ext/ui.lv2/ui.h b/ext/ui.lv2/ui.h deleted file mode 100644 index 5274cd5..0000000 --- a/ext/ui.lv2/ui.h +++ /dev/null @@ -1,312 +0,0 @@ -/************************************************************************ - * - * In-process UI extension for LV2 - * - * Copyright (C) 2006-2011 Lars Luthman <mail@larsluthman.net> - * - * Based on lv2.h, which was - * - * Copyright (C) 2000-2002 Richard W.E. Furse, Paul Barton-Davis, - * Stefan Westerfeld - * Copyright (C) 2006 Steve Harris, David Robillard. - * - * This header is free software; you can redistribute it and/or modify it - * under the terms of the GNU Lesser General Public License as published - * by the Free Software Foundation; either version 2.1 of the License, - * or (at your option) any later version. - * - * This header 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 - * USA. - * - ***********************************************************************/ - -/** - @file ui.h C API for the LV2 UI extension <http://lv2plug.in/ns/ext/ui>. - - This file specifies a C API for communication between an LV2 host and an - LV2 UI. The interface is similar to the one used for actual LV2 plugins. - - The entry point is the function lv2ui_descriptor(). -*/ - -#ifndef LV2_UI_H -#define LV2_UI_H - -#include <lv2.h> - -/** The URI of this extension (note this is not the same as the prefix). */ -#define LV2_UI_URI "http://lv2plug.in/ns/ext/ui" - -/** The numerical ID returned by LV2_UI_Host_Descriptor::port_index() for - invalid port symbols. */ -#define LV2_UI_INVALID_PORT_INDEX ((uint32_t)-1) - -/** The numerical ID returned by LV2_UI_Host_Descriptor::port_protocol_id() for - invalid or unsupported PortProtocols. */ -#define LV2_UI_INVALID_PORT_PROTOCOL_ID 0 - -/** The full URI for the ui:floatControl PortProtocol. */ -#define LV2_UI_FLOAT_CONTROL_URI "http://lv2plug.in/ns/ext/ui#floatControl" - -#ifdef __cplusplus -extern "C" { -#endif - -/** - A pointer to a widget or other type of UI. - The actual type is defined by the type of the UI defined in the RDF data. - All the functionality provided by this extension is toolkit independent, the - host only needs to pass the necessary callbacks and display the widget, if - possible. Plugins may have several UIs, in various toolkits. -*/ -typedef void* LV2_UI_Widget; - -/** - Handle for a particular instance of a UI. - It is valid to compare this to NULL (0 for C++) but otherwise the host MUST - NOT attempt to interpret it. The UI may use it to reference internal - instance data. -*/ -typedef void* LV2_UI_Handle; - -/** - Handle for host functions and data provided to a UI. - An object of this type is passed to the UI's instantiate() function, and the - UI must in turn pass it as the first parameter to the callbacks in - LV2_UI_Host_Descriptor. The host may use it to reference internal data, such - as the plugin instance that the UI is associated with. The UI MUST NOT - interpret the value of an LV2_UI_Host_Handle in any way. -*/ -typedef void* LV2_UI_Host_Handle; - -/** - Host-provided functions that the UI can use to control the plugin instance. - - A pointer to an object of this type is passed to the lv2ui_descriptor() - function. - - The host MUST provide non-NULL values for all the function pointers. -*/ -typedef struct _LV2_UI_Host_Descriptor { - - /** - Send data to one of the plugin's input ports. - - The @a buffer parameter MUST point to a block of data @a buffer_size - bytes large. The contents of this buffer and what the host should do - with it depends on the value of the @a port_protocol parameter. - - The @a port_protocol parameter MUST be a numeric ID for a - ui:PortProtocol. Numeric IDs for PortProtocols are retrieved using the - port_protocol_id() function. - - The @a buffer is only valid during the time of this function call, so if - the host wants to keep it for later use it has to copy the contents to an - internal buffer. - - @param host_handle The @a host_handle that was passed to the UI's - instantiate() function. - @param port_index The index of the port that the data should be written - to, as returned by port_index(). - @param buffer_size The size of the data pointed to by @a buffer, in - bytes. - @param port_protocol The numeric ID of the Port Protocol to use, - as returned by port_protocol_id(). - */ - void (*write_port)(LV2_UI_Host_Handle host_handle, - uint32_t port_index, - uint32_t buffer_size, - uint32_t port_protocol, - void const* buffer); - - /** - Return the numerical index for a port. - This index is used when writing data to ports using write_port() and whe - receiving data using port_event(). If @a port_symbol is not a valid port - symbol for @a plugin the host it MUST return - LV2_UI_INVALID_PORT_INDEX. For performance reasons it may be a good idea - to cache port indices in the UI at instantiation time. - - @param host_handle The LV2_UI_Host_Handle that was passed to the UI's - instantiate() function. - @param port_symbol The port's symbol, as defined in the RDF data for - the plugin. - */ - uint32_t (*port_index)(LV2_UI_Host_Handle host_handle, - char const* port_symbol); - - /** - This function is used by the UI, typically at instantiation, to get - the numeric IDs that are mapped to certain ui:PortProtocols (see - ui.ttl for details). If the host does not support the given - ui:PortProtocol it MUST return LV2_UI_INVALID_PORT_PROTOCOL_ID, - but the UI SHOULD not rely on this to find out which protocols - are supported, it should check the @a features array passed to - instantiate() for this. - - @param host_handle The @a host_handle that was passed to the UI's - instantiate() function. - @param port_protocol_uri The URI of the ui:PortProtocol. - */ - uint32_t (*port_protocol_id)(LV2_UI_Host_Handle host_handle, - char const* port_protocol_uri); - - /** - Subscribe to updates for a port. - This means that the host will call the UI's port_event() function when - the port value changes (as defined by the PortProtocol). - - Calling this function with the same @a port_index and @a port_protocol - as an already active subscription has no effect. - - @param host_handle The @a host_handle that was passed to the UI's - instantiate() function. - @param port_index The index of the port, as returned by port_index(). - @param port_protocol The numeric ID of the PortProtocol, as - returned by port_protocol_id(). - */ - void (*add_port_subscription)(LV2_UI_Host_Handle host_handle, - uint32_t port_index, - uint32_t port_protocol); - - /** - Unsubscribe to updates for a port. - This means that the host will cease calling calling port_event() when - the port value changes. - - Calling this function with a @a port_index and @a port_protocol that - does not refer to an active port subscription has no effect. - - @param host_handle The @a host_handle that was passed to the UI's - instantiate() function. - @param port_index The index of the port, as returned by port_index(). - @param port_protocol The numeric ID of the PortProtocol, as - returned by port_protocol_id(). - */ - void (*remove_port_subscription)(LV2_UI_Host_Handle host_handle, - uint32_t port_index, - uint32_t port_protocol); - -} LV2_UI_Host_Descriptor; - -/** - This struct contains the implementation of an UI. A pointer to an - object of this type is returned by the lv2ui_descriptor() function. -*/ -typedef struct _LV2_UI_Descriptor { - - /** - The URI for this UI (not for the plugin it controls). - */ - char const* URI; - - /** - Create a new UI object and return a handle to it. This function works - similarly to the instantiate() member in LV2_Descriptor. - - @param descriptor The descriptor for the UI to instantiate. - - @param plugin_uri The URI of the plugin that this UI will control. - - @param bundle_path The path to the bundle containing the RDF data that - references this shared object file, with trailing separator (e.g. '/'). - - @param host_descriptor A pointer to an object that contains function - pointers that the UI instance should use to control the plugin - instance. This pointer MUST be valid until cleanup() is called for this - UI instance. - - @param host_handle A handle that the host may use to reference internal - data. It MUST be passed as the first parameter to the function - pointers in @a host_descriptor, and MUST NOT be interpreted in any other - way by the UI. - - @param features A NULL-terminated array of LV2_Feature pointers. The - host must pass all feature URIs that it and the UI supports and any - additional data, just like in the LV2 plugin instantiate() - function. Note that UI features and plugin features are NOT necessarily - the same; @a features will probably not be the same array as the one the - plugin host passes to a plugin. - */ - LV2_UI_Handle (*instantiate)(struct _LV2_UI_Descriptor const* descriptor, - char const* plugin_uri, - char const* bundle_path, - LV2_UI_Host_Descriptor const* host_descriptor, - LV2_UI_Host_Handle host_handle, - LV2_Feature const* const* features); - - /** - Return the widget pointer for the UI object. - This MUST return the same value during the entire lifetime of the UI - object. - */ - LV2_UI_Widget (*get_widget)(LV2_UI_Handle ui); - - /** - Destroy the UI object and the associated widget. - The host must not try to access the widget after calling this function. - */ - void (*cleanup)(LV2_UI_Handle ui); - - /** - Notify the UI that something has happened to a subscribed port. - - This is called by the host when something happens at a plugin port that - has been subscribed to using - LV2_UI_Host_Descriptor::add_port_subscription(). - - The @a buffer is only valid during the time of this function call, so if - the UI wants to keep it for later use it has to copy the contents to an - internal buffer. - - @param ui A handle for the UI object. - @param port_index The index of the port that has changed, as returned by - LV2_UI_Host_Descriptor::port_index(). - @param buffer_size The size of the data buffer in bytes. - @param port_protocol The format of the data buffer, as returned by - LV2_UI_Host_Descriptor::port_protocol_id(). - @param buffer A pointer to the data buffer. - */ - void (*port_event)(LV2_UI_Handle ui, - uint32_t port_index, - uint32_t buffer_size, - uint32_t port_protocol, - void const* buffer); - - /** - Return a data structure associated with an extension URI. - - This facility can be used by extensions to extend the LV2_UI_Descriptor - API. This function adheres to the same rules as - LV2_Descriptor::extension_data, except it applies to UIs rather than - plugins. - */ - void const* (*extension_data)(char const* uri); - -} LV2_UI_Descriptor; - -/** - Prototype for UI accessor function. - - This function follows the same rules as lv2_desciprotr(), except it applies - to UIs rather than plugins. -*/ -LV2_UI_Descriptor const* lv2ui_descriptor(uint32_t index); - -/** - Type of the lv2ui_descriptor() function in a UI library. -*/ -typedef LV2_UI_Descriptor const* (*LV2_UI_DescriptorFunction)(uint32_t index); - -#ifdef __cplusplus -} -#endif - -#endif /* LV2_UI_H */ |