From 809f5ae5999901be62f9d0cc1eb8a2d0f4806780 Mon Sep 17 00:00:00 2001 From: David Robillard Date: Thu, 28 Apr 2011 21:56:29 +0000 Subject: Rename slv2 to lilv. API breakage was proving too much of a hassle, and would be even further of a mess after release and packaging. Best to make a clean break now, and fix installation to support parallel installs and prevent this kind of problem in the future. git-svn-id: http://svn.drobilla.net/lad/trunk/lilv@3217 a436a847-0d15-0410-975c-d299462d15a1 --- lilv/lilv.h | 1364 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1364 insertions(+) create mode 100644 lilv/lilv.h (limited to 'lilv/lilv.h') diff --git a/lilv/lilv.h b/lilv/lilv.h new file mode 100644 index 0000000..161c01b --- /dev/null +++ b/lilv/lilv.h @@ -0,0 +1,1364 @@ +/* + Copyright 2007-2011 David Robillard + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/** + @file lilv.h API for Lilv, a lightweight LV2 host library. +*/ + +#ifndef LILV_LILV_H +#define LILV_LILV_H + +#include +#include +#include + +#include "lv2/lv2plug.in/ns/lv2core/lv2.h" + +#ifdef LILV_SHARED +# ifdef __WIN32__ +# define LILV_LIB_IMPORT __declspec(dllimport) +# define LILV_LIB_EXPORT __declspec(dllexport) +# else +# define LILV_LIB_IMPORT __attribute__((visibility("default"))) +# define LILV_LIB_EXPORT __attribute__((visibility("default"))) +# endif +# ifdef LILV_INTERNAL +# define LILV_API LILV_LIB_EXPORT +# else +# define LILV_API LILV_LIB_IMPORT +# endif +#else +# define LILV_API +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +#define LILV_NAMESPACE_LV2 "http://lv2plug.in/ns/lv2core#" +#define LILV_PORT_CLASS_PORT "http://lv2plug.in/ns/lv2core#Port" +#define LILV_PORT_CLASS_INPUT "http://lv2plug.in/ns/lv2core#InputPort" +#define LILV_PORT_CLASS_OUTPUT "http://lv2plug.in/ns/lv2core#OutputPort" +#define LILV_PORT_CLASS_CONTROL "http://lv2plug.in/ns/lv2core#ControlPort" +#define LILV_PORT_CLASS_AUDIO "http://lv2plug.in/ns/lv2core#AudioPort" +#define LILV_PORT_CLASS_EVENT "http://lv2plug.in/ns/ext/event#EventPort" +#define LILV_EVENT_CLASS_MIDI "http://lv2plug.in/ns/ext/midi#MidiEvent" + +typedef struct _LilvPlugin* LilvPlugin; /**< LV2 Plugin. */ +typedef struct _LilvPluginClass* LilvPluginClass; /**< Plugin Class. */ +typedef struct _LilvPort* LilvPort; /**< Port. */ +typedef struct _LilvScalePoint* LilvScalePoint; /**< Scale Point (Notch). */ +typedef struct _LilvUI* LilvUI; /**< Plugin UI. */ +typedef struct _LilvValue* LilvValue; /**< Typed Value. */ +typedef struct _LilvWorld* LilvWorld; /**< Lilv World. */ +typedef struct _LilvUIInstance* LilvUIInstance; /**< Plugin UI Instance. */ + +typedef void* LilvPluginClasses; /**< set. */ +typedef void* LilvPlugins; /**< set. */ +typedef void* LilvScalePoints; /**< set. */ +typedef void* LilvUIs; /**< set. */ +typedef void* LilvValues; /**< set. */ + +/** + @defgroup lilv Lilv + Lilv is a simple yet powerful C API for using LV2 plugins. + + For more information about LV2, see . + For more information about Lilv, see . + @{ +*/ + +/** + @name Value + @{ +*/ + +/** + Convert a file URI string to a local path string. + For example, "file://foo/bar/baz.ttl" returns "/foo/bar/baz.ttl". + Return value is shared and must not be deleted by caller. + @return @a uri converted to a path, or NULL on failure (URI is not local). +*/ +LILV_API +const char* +lilv_uri_to_path(const char* uri); + +/** + Create a new URI value. + Returned value must be freed by caller with lilv_value_free. +*/ +LILV_API +LilvValue +lilv_value_new_uri(LilvWorld world, const char* uri); + +/** + Create a new string value (with no language). + Returned value must be freed by caller with lilv_value_free. +*/ +LILV_API +LilvValue +lilv_value_new_string(LilvWorld world, const char* str); + +/** + Create a new integer value. + Returned value must be freed by caller with lilv_value_free. +*/ +LILV_API +LilvValue +lilv_value_new_int(LilvWorld world, int val); + +/** + Create a new floating point value. + Returned value must be freed by caller with lilv_value_free. +*/ +LILV_API +LilvValue +lilv_value_new_float(LilvWorld world, float val); + +/** + Create a new boolean value. + Returned value must be freed by caller with lilv_value_free. +*/ +LILV_API +LilvValue +lilv_value_new_bool(LilvWorld world, bool val); + +/** + Free an LilvValue. +*/ +LILV_API +void +lilv_value_free(LilvValue val); + +/** + Duplicate an LilvValue. +*/ +LILV_API +LilvValue +lilv_value_duplicate(LilvValue val); + +/** + Return whether two values are equivalent. +*/ +LILV_API +bool +lilv_value_equals(LilvValue value, LilvValue other); + +/** + Return this value as a Turtle/SPARQL token. + Returned value must be freed by caller with lilv_value_free. + + + + + + + + +
Example Turtle Tokens
URI<http://example.org/foo >
QNamedoap:name
String"this is a string"
Float1.0
Integer1
Booleantrue
+*/ +LILV_API +char* +lilv_value_get_turtle_token(LilvValue value); + +/** + Return whether the value is a URI (resource). +*/ +LILV_API +bool +lilv_value_is_uri(LilvValue value); + +/** + Return this value as a URI string, e.g. "http://example.org/foo". + Valid to call only if lilv_value_is_uri(@a value) returns true. + Returned value is owned by @a value and must not be freed by caller. +*/ +LILV_API +const char* +lilv_value_as_uri(LilvValue value); + +/** + Return whether the value is a blank node (resource with no URI). +*/ +LILV_API +bool +lilv_value_is_blank(LilvValue value); + +/** + Return this value as a blank node identifier, e.g. "genid03". + Valid to call only if lilv_value_is_blank(@a value) returns true. + Returned value is owned by @a value and must not be freed by caller. +*/ +LILV_API +const char* +lilv_value_as_blank(LilvValue value); + +/** + Return whether this value is a literal (i.e. not a URI). + Returns true if @a value is a string or numeric value. +*/ +LILV_API +bool +lilv_value_is_literal(LilvValue value); + +/** + Return whether this value is a string literal. + Returns true if @a value is a string value (and not numeric). +*/ +LILV_API +bool +lilv_value_is_string(LilvValue value); + +/** + Return @a value as a string. +*/ +LILV_API +const char* +lilv_value_as_string(LilvValue value); + +/** + Return whether this value is a decimal literal. +*/ +LILV_API +bool +lilv_value_is_float(LilvValue value); + +/** + Return @a value as a float. + Valid to call only if lilv_value_is_float(@a value) or + lilv_value_is_int(@a value) returns true. +*/ +LILV_API +float +lilv_value_as_float(LilvValue value); + +/** + Return whether this value is an integer literal. +*/ +LILV_API +bool +lilv_value_is_int(LilvValue value); + +/** + Return @a value as an integer. + Valid to call only if lilv_value_is_int(@a value) returns true. +*/ +LILV_API +int +lilv_value_as_int(LilvValue value); + +/** + Return whether this value is a boolean. +*/ +LILV_API +bool +lilv_value_is_bool(LilvValue value); + +/** + Return @a value as a bool. + Valid to call only if lilv_value_is_bool(@a value) returns true. +*/ +LILV_API +bool +lilv_value_as_bool(LilvValue value); + +/** + @} + @name Collections + Lilv has several collection types for holding various types of value: +
    +
  • LilvPlugins (function prefix "lilv_plugins_")
    • +
  • LilvPluginClasses (function prefix "lilv_plugin_classes_")
    • +
  • LilvScalePoints (function prefix "lilv_scale_points_")
    • +
  • LilvValues (function prefix "lilv_values_")
    • +
  • LilvUIs (function prefix "lilv_uis_")
    • +
+ + Each collection type supports a similar basic API: +
    +
  • void PREFIX_free (coll)
    • +
  • unsigned PREFIX_size (coll)
    • +
  • LilvIter PREFIX_begin (coll)
    • +
+ @{ +*/ + +/* Collections */ + +typedef void* LilvIter; + +/** + Iterate over each element of a collection. + @code + LILV_FOREACH(plugin_classes, i, classes) { + LilvPluginClass c = lilv_plugin_classes_get(classes, i); + // ... + } + @endcode +*/ +#define LILV_FOREACH(colltype, iter, collection) \ + for (LilvIter (iter) = lilv_ ## colltype ## _begin(collection); \ + !lilv_ ## colltype ## _is_end(collection, iter); \ + (iter) = lilv_ ## colltype ## _next(collection, iter)) + +/* LilvPluginClasses */ + +LILV_API +void +lilv_plugin_classes_free(LilvPluginClasses collection); + +LILV_API +unsigned +lilv_plugin_classes_size(LilvPluginClasses collection); + +LILV_API +LilvIter +lilv_plugin_classes_begin(LilvPluginClasses collection); + +LILV_API +LilvPluginClass +lilv_plugin_classes_get(LilvPluginClasses collection, LilvIter i); + +LILV_API +LilvIter +lilv_plugin_classes_next(LilvPluginClasses collection, LilvIter i); + +LILV_API +bool +lilv_plugin_classes_is_end(LilvPluginClasses collection, LilvIter i); + +/** + Get a plugin class from @a classes by URI. + Return value is shared (stored in @a classes) and must not be freed or + modified by the caller in any way. + @return NULL if no plugin class with @a uri is found in @a classes. +*/ +LILV_API +LilvPluginClass +lilv_plugin_classes_get_by_uri(LilvPluginClasses classes, + LilvValue uri); + +/* ScalePoints */ + +LILV_API +void +lilv_scale_points_free(LilvScalePoints collection); + +LILV_API +unsigned +lilv_scale_points_size(LilvScalePoints collection); + +LILV_API +LilvIter +lilv_scale_points_begin(LilvScalePoints collection); + +LILV_API +LilvScalePoint +lilv_scale_points_get(LilvScalePoints collection, LilvIter i); + +LILV_API +LilvIter +lilv_scale_points_next(LilvScalePoints collection, LilvIter i); + +LILV_API +bool +lilv_scale_points_is_end(LilvScalePoints collection, LilvIter i); + +/* UIs */ + +LILV_API +void +lilv_uis_free(LilvUIs collection); + +LILV_API +unsigned +lilv_uis_size(LilvUIs collection); + +LILV_API +LilvIter +lilv_uis_begin(LilvUIs collection); + +LILV_API +LilvUI +lilv_uis_get(LilvUIs collection, LilvIter i); + +LILV_API +LilvIter +lilv_uis_next(LilvUIs collection, LilvIter i); + +LILV_API +bool +lilv_uis_is_end(LilvUIs collection, LilvIter i); + +/** + Get a UI from @a uis by URI. + Return value is shared (stored in @a uis) and must not be freed or + modified by the caller in any way. + @return NULL if no UI with @a uri is found in @a list. +*/ +LILV_API +LilvUI +lilv_uis_get_by_uri(LilvUIs uis, + LilvValue uri); + +/* Values */ + +LILV_API +void +lilv_values_free(LilvValues collection); + +LILV_API +unsigned +lilv_values_size(LilvValues collection); + +LILV_API +LilvIter +lilv_values_begin(LilvValues collection); + +LILV_API +LilvValue +lilv_values_get(LilvValues collection, LilvIter i); + +LILV_API +LilvIter +lilv_values_next(LilvValues collection, LilvIter i); + +LILV_API +bool +lilv_values_is_end(LilvValues collection, LilvIter i); + +LILV_API +LilvValue +lilv_values_get_first(LilvValues collection); + +/** + Return whether @a values contains @a value. +*/ +LILV_API +bool +lilv_values_contains(LilvValues values, LilvValue value); + +/* Plugins */ + +LILV_API +unsigned +lilv_plugins_size(LilvPlugins collection); + +LILV_API +LilvIter +lilv_plugins_begin(LilvPlugins collection); + +LILV_API +LilvPlugin +lilv_plugins_get(LilvPlugins collection, LilvIter i); + +LILV_API +LilvIter +lilv_plugins_next(LilvPlugins collection, LilvIter i); + +LILV_API +bool +lilv_plugins_is_end(LilvPlugins collection, LilvIter i); + +LILV_API +void +lilv_plugins_free(LilvWorld world, LilvPlugins plugins); + +/** + Get a plugin from @a plugins by URI. + Return value is shared (stored in @a plugins) and must not be freed or + modified by the caller in any way. + @return NULL if no plugin with @a uri is found in @a plugins. +*/ +LILV_API +LilvPlugin +lilv_plugins_get_by_uri(LilvPlugins plugins, + LilvValue uri); + +/** + @} + @name World + The "world" represents all Lilv state, and is used to discover/load/cache + LV2 data (plugins, UIs, and extensions). + Normal hosts which just need to load plugins by URI should simply use + @ref lilv_world_load_all to discover/load the system's LV2 resources. + @{ +*/ + +/** + Initialize a new, empty world. + If initialization fails, NULL is returned. +*/ +LILV_API +LilvWorld +lilv_world_new(void); + +/** + Enable/disable language filtering. + Language filtering applies to any functions that return (a) value(s). + With filtering enabled, Lilv will automatically return the best value(s) + for the current LANG. With filtering disabled, all matching values will + be returned regardless of language tag. Filtering is enabled by default. +*/ +#define LILV_OPTION_FILTER_LANG "http://drobilla.net/ns/lilv#filter-lang" + +/** + Enable/disable dynamic manifest support. + Dynamic manifest data will only be loaded if this option is true. +*/ +#define LILV_OPTION_DYN_MANIFEST "http://drobilla.net/ns/lilv#dyn-manifest" + +/** + Set an option option for @a world. + + Currently recognized options: + @ref LILV_OPTION_FILTER_LANG + @ref LILV_OPTION_DYN_MANIFEST +*/ +LILV_API +void +lilv_world_set_option(LilvWorld world, + const char* uri, + const LilvValue value); + +/** + Destroy the world, mwahaha. + Note that destroying @a world will destroy all the objects it contains + (e.g. instances of LilvPlugin). Do not destroy the world until you are + finished with all objects that came from it. +*/ +LILV_API +void +lilv_world_free(LilvWorld world); + +/** + Load all installed LV2 bundles on the system. + This is the recommended way for hosts to load LV2 data. It implements the + established/standard best practice for discovering all LV2 data on the + system. The environment variable LV2_PATH may be used to control where + this function will look for bundles. + + Hosts should use this function rather than explicitly load bundles, except + in special circumstances (e.g. development utilities, or hosts that ship + with special plugin bundles which are installed to a known location). +*/ +LILV_API +void +lilv_world_load_all(LilvWorld world); + +/** + Load a specific bundle. + @a bundle_uri must be a fully qualified URI to the bundle directory, + with the trailing slash, eg. file:///usr/lib/lv2/foo.lv2/ + + Normal hosts should not need this function (use lilv_world_load_all). + + Hosts MUST NOT attach any long-term significance to bundle paths + (e.g. in save files), since there are no guarantees they will remain + unchanged between (or even during) program invocations. Plugins (among + other things) MUST be identified by URIs (not paths) in save files. +*/ +LILV_API +void +lilv_world_load_bundle(LilvWorld world, + LilvValue bundle_uri); + +/** + Get the parent of all other plugin classes, lv2:Plugin. +*/ +LILV_API +LilvPluginClass +lilv_world_get_plugin_class(LilvWorld world); + +/** + Return a list of all found plugin classes. + Returned list is owned by world and must not be freed by the caller. +*/ +LILV_API +LilvPluginClasses +lilv_world_get_plugin_classes(LilvWorld world); + +/** + Return a list of all found plugins. + The returned list contains just enough references to query + or instantiate plugins. The data for a particular plugin will not be + loaded into memory until a call to an lilv_plugin_* function results in + a query (at which time the data is cached with the LilvPlugin so future + queries are very fast). + + The returned list and the plugins it contains are owned by @a world + and must not be freed by caller. +*/ +LILV_API +LilvPlugins +lilv_world_get_all_plugins(LilvWorld world); + +/** + Return the plugin with the given @a uri, or NULL if not found. +*/ +LILV_API +LilvPlugin +lilv_world_get_plugin_by_uri_string(LilvWorld world, + const char* uri); + +/** + @} + @name Plugin + @{ +*/ + +/** + Check if @a plugin is valid. + This is not a rigorous validator, but can be used to reject some malformed + plugins that could cause bugs (e.g. plugins with missing required fields). + + Note that normal hosts do NOT need to use this - lilv does not + load invalid plugins into plugin lists. This is included for plugin + testing utilities, etc. + @return true iff @a plugin is valid. +*/ +LILV_API +bool +lilv_plugin_verify(LilvPlugin plugin); + +/** + Get the URI of @a plugin. + Any serialization that refers to plugins should refer to them by this. + Hosts SHOULD NOT save any filesystem paths, plugin indexes, etc. in saved + files; save only the URI. + + The URI is a globally unique identifier for one specific plugin. Two + plugins with the same URI are compatible in port signature, and should + be guaranteed to work in a compatible and consistent way. If a plugin + is upgraded in an incompatible way (eg if it has different ports), it + MUST have a different URI than it's predecessor. + + @return A shared URI value which must not be modified or freed. +*/ +LILV_API +LilvValue +lilv_plugin_get_uri(LilvPlugin plugin); + +/** + Get the (resolvable) URI of the plugin's "main" bundle. + This returns the URI of the bundle where the plugin itself was found. + Note that the data for a plugin may be spread over many bundles, that is, + lilv_plugin_get_data_uris may return URIs which are not within this bundle. + + Typical hosts should not need to use this function. + Note this always returns a fully qualified URI. If you want a local + filesystem path, use lilv_uri_to_path. + @return a shared string which must not be modified or freed. +*/ +LILV_API +LilvValue +lilv_plugin_get_bundle_uri(LilvPlugin plugin); + +/** + Get the (resolvable) URIs of the RDF data files that define a plugin. + Typical hosts should not need to use this function. + Note this always returns fully qualified URIs. If you want local + filesystem paths, use lilv_uri_to_path. + @return a list of complete URLs eg. "file:///foo/ABundle.lv2/aplug.ttl", + which is shared and must not be modified or freed. +*/ +LILV_API +LilvValues +lilv_plugin_get_data_uris(LilvPlugin plugin); + +/** + Get the (resolvable) URI of the shared library for @a plugin. + Note this always returns a fully qualified URI. If you want a local + filesystem path, use lilv_uri_to_path. + @return a shared string which must not be modified or freed. +*/ +LILV_API +LilvValue +lilv_plugin_get_library_uri(LilvPlugin plugin); + +/** + Get the name of @a plugin. + This returns the name (doap:name) of the plugin. The name may be + translated according to the current locale, this value MUST NOT be used + as a plugin identifier (use the URI for that). + Returned value must be freed by the caller. +*/ +LILV_API +LilvValue +lilv_plugin_get_name(LilvPlugin plugin); + +/** + Get the class this plugin belongs to (ie Filters). +*/ +LILV_API +LilvPluginClass +lilv_plugin_get_class(LilvPlugin plugin); + +/** + Get a value associated with the plugin in a plugin's data files. + @a predicate must be either a URI or a QName. + + Returns the ?object of all triples found of the form: + + <plugin-uri> predicate ?object + + May return NULL if the property was not found, or if object(s) is not + sensibly represented as an LilvValues (e.g. blank nodes). + Return value must be freed by caller with lilv_values_free. +*/ +LILV_API +LilvValues +lilv_plugin_get_value(LilvPlugin p, + LilvValue predicate); + +/** + Get a value associated with the plugin in a plugin's data files. + This function is identical to lilv_plugin_get_value, but takes a QName + string parameter for a predicate instead of an LilvValue, which may be + more convenient. +*/ +LILV_API +LilvValues +lilv_plugin_get_value_by_qname(LilvPlugin p, + const char* predicate); + +/** + Get a value associated with some subject in a plugin's data files. + @a predicate must be either a URI or a QName. + + Returns the ?object of all triples found of the form: + + subject predicate ?object + + This can be used to investigate URIs returned by lilv_plugin_get_value + (if information about it is contained in the plugin's data files). + + May return NULL if the property was not found, or if object is not + sensibly represented as an LilvValues (e.g. blank nodes). + Return value must be freed by caller with lilv_values_free. +*/ +LILV_API +LilvValues +lilv_plugin_get_value_for_subject(LilvPlugin p, + LilvValue subject_uri, + LilvValue predicate_uri); + +/** + Return whether a feature is supported by a plugin. + This will return true if the feature is an optional or required feature + of the plugin. +*/ +LILV_API +bool +lilv_plugin_has_feature(LilvPlugin p, + LilvValue feature_uri); + +/** + Get the LV2 Features supported (required or optionally) by a plugin. + A feature is "supported" by a plugin if it is required OR optional. + + Since required features have special rules the host must obey, this function + probably shouldn't be used by normal hosts. Using lilv_plugin_get_optional_features + and lilv_plugin_get_required_features separately is best in most cases. + + Returned value must be freed by caller with lilv_values_free. +*/ +LILV_API +LilvValues +lilv_plugin_get_supported_features(LilvPlugin p); + +/** + Get the LV2 Features required by a plugin. + If a feature is required by a plugin, hosts MUST NOT use the plugin if they do not + understand (or are unable to support) that feature. + + All values returned here MUST be passed to the plugin's instantiate method + (along with data, if necessary, as defined by the feature specification) + or plugin instantiation will fail. + + Return value must be freed by caller with lilv_values_free. +*/ +LILV_API +LilvValues +lilv_plugin_get_required_features(LilvPlugin p); + +/** + Get the LV2 Features optionally supported by a plugin. + Hosts MAY ignore optional plugin features for whatever reasons. Plugins + MUST operate (at least somewhat) if they are instantiated without being + passed optional features. + + Return value must be freed by caller with lilv_values_free. +*/ +LILV_API +LilvValues +lilv_plugin_get_optional_features(LilvPlugin p); + +/** + Get the number of ports on this plugin. +*/ +LILV_API +uint32_t +lilv_plugin_get_num_ports(LilvPlugin p); + +/** + Get the port ranges (minimum, maximum and default values) for all ports. + @a min_values, @a max_values and @a def_values must either point to an array + of N floats, where N is the value returned by lilv_plugin_get_num_ports() + for this plugin, or NULL. The elements of the array will be set to the + the minimum, maximum and default values of the ports on this plugin, + with array index corresponding to port index. If a port doesn't have a + minimum, maximum or default value, or the port's type is not float, the + corresponding array element will be set to NAN. + + This is a convenience method for the common case of getting the range of + all float ports on a plugin, and may be significantly faster than + repeated calls to lilv_port_get_range. +*/ +LILV_API +void +lilv_plugin_get_port_ranges_float(LilvPlugin p, + float* min_values, + float* max_values, + float* def_values); + +/** + Get the number of ports on this plugin that are members of some class(es). + Note that this is a varargs function so ports fitting any type 'profile' + desired can be found quickly. REMEMBER TO TERMINATE THE PARAMETER LIST + OF THIS FUNCTION WITH NULL OR VERY NASTY THINGS WILL HAPPEN. +*/ +LILV_API +uint32_t +lilv_plugin_get_num_ports_of_class(LilvPlugin p, + LilvValue class_1, ...); + +/** + Return whether or not the plugin introduces (and reports) latency. + The index of the latency port can be found with lilv_plugin_get_latency_port + ONLY if this function returns true. +*/ +LILV_API +bool +lilv_plugin_has_latency(LilvPlugin p); + +/** + Return the index of the plugin's latency port. + It is a fatal error to call this on a plugin without checking if the port + exists by first calling lilv_plugin_has_latency. + + Any plugin that introduces unwanted latency that should be compensated for + (by hosts with the ability/need) MUST provide this port, which is a control + rate output port that reports the latency for each cycle in frames. +*/ +LILV_API +uint32_t +lilv_plugin_get_latency_port_index(LilvPlugin p); + +/** + Get a port on @a plugin by @a index. +*/ +LILV_API +LilvPort +lilv_plugin_get_port_by_index(LilvPlugin plugin, + uint32_t index); + +/** + Get a port on @a plugin by @a symbol. + Note this function is slower than lilv_plugin_get_port_by_index, + especially on plugins with a very large number of ports. +*/ +LILV_API +LilvPort +lilv_plugin_get_port_by_symbol(LilvPlugin plugin, + LilvValue symbol); + +/** + Get the full name of the plugin's author. + Returns NULL if author name is not present. + Returned value must be freed by caller. +*/ +LILV_API +LilvValue +lilv_plugin_get_author_name(LilvPlugin plugin); + +/** + Get the email address of the plugin's author. + Returns NULL if author email address is not present. + Returned value must be freed by caller. +*/ +LILV_API +LilvValue +lilv_plugin_get_author_email(LilvPlugin plugin); + +/** + Get the email address of the plugin's author. + Returns NULL if author homepage is not present. + Returned value must be freed by caller. +*/ +LILV_API +LilvValue +lilv_plugin_get_author_homepage(LilvPlugin plugin); + +/** + Return true iff @a plugin has been replaced by another plugin. + + The plugin will still be usable, but hosts should hide them from their + user interfaces to prevent users from using deprecated plugins. +*/ +LILV_API +bool +lilv_plugin_is_replaced(LilvPlugin plugin); + +/** + @} + @name Port + @{ +*/ + +/** + Port analog of lilv_plugin_get_value. +*/ +LILV_API +LilvValues +lilv_port_get_value(LilvPlugin plugin, + LilvPort port, + LilvValue predicate); + +/** + Port analog of lilv_plugin_get_value_by_qname. +*/ +LILV_API +LilvValues +lilv_port_get_value_by_qname(LilvPlugin plugin, + LilvPort port, + const char* predicate); + +/** + Return the LV2 port properties of a port. +*/ +LILV_API +LilvValues +lilv_port_get_properties(LilvPlugin plugin, + LilvPort port); + +/** + Return whether a port has a certain property. +*/ +LILV_API +bool +lilv_port_has_property(LilvPlugin p, + LilvPort port, + LilvValue property_uri); + +/** + Return whether a port is an event port and supports a certain event type. +*/ +LILV_API +bool +lilv_port_supports_event(LilvPlugin p, + LilvPort port, + LilvValue event_uri); + +/** + Get the symbol of a port. + The 'symbol' is a short string, a valid C identifier. + Returned value is owned by @a port and must not be freed. +*/ +LILV_API +LilvValue +lilv_port_get_symbol(LilvPlugin plugin, + LilvPort port); + +/** + Get the name of a port. + This is guaranteed to return the untranslated name (the doap:name in the + data file without a language tag). Returned value must be freed by + the caller. +*/ +LILV_API +LilvValue +lilv_port_get_name(LilvPlugin plugin, + LilvPort port); + +/** + Get all the classes of a port. + This can be used to determine if a port is an input, output, audio, + control, midi, etc, etc, though it's simpler to use lilv_port_is_a. + The returned list does not include lv2:Port, which is implied. + Returned value is shared and must not be destroyed by caller. +*/ +LILV_API +LilvValues +lilv_port_get_classes(LilvPlugin plugin, + LilvPort port); + +/** + Determine if a port is of a given class (input, output, audio, etc). + For convenience/performance/extensibility reasons, hosts are expected to + create an LilvValue for each port class they "care about". Well-known type + URI strings are defined (e.g. LILV_PORT_CLASS_INPUT) for convenience, but + this function is designed so that Lilv is usable with any port types + without requiring explicit support in Lilv. +*/ +LILV_API +bool +lilv_port_is_a(LilvPlugin plugin, + LilvPort port, + LilvValue port_class); + +/** + Get the default, minimum, and maximum values of a port. + @a def, @a min, and @a max are outputs, pass pointers to uninitialized + (i.e. NOT created with lilv_value_new) LilvValue variables. These will + be set to point at new values (which must be freed by the caller using + lilv_value_free), or NULL if the value does not exist. +*/ +LILV_API +void +lilv_port_get_range(LilvPlugin plugin, + LilvPort port, + LilvValue* deflt, + LilvValue* min, + LilvValue* max); + +/** + Get the scale points (enumeration values) of a port. + This returns a collection of 'interesting' named values of a port + (e.g. appropriate entries for a UI selector associated with this port). + Returned value may be NULL if @a port has no scale points, otherwise it + must be freed by caller with lilv_scale_points_free. +*/ +LILV_API +LilvScalePoints +lilv_port_get_scale_points(LilvPlugin plugin, + LilvPort port); + +/** + @} + @name Scale Point + @{ +*/ + +/** + Get the label of this scale point (enumeration value) + Returned value is owned by @a point and must not be freed. +*/ +LILV_API +LilvValue +lilv_scale_point_get_label(LilvScalePoint point); + +/** + Get the value of this scale point (enumeration value) + Returned value is owned by @a point and must not be freed. +*/ +LILV_API +LilvValue +lilv_scale_point_get_value(LilvScalePoint point); + +/** + @} + @name Plugin Class + @{ +*/ + +/** + Get the URI of this class' superclass. + Returned value is owned by @a plugin_class and must not be freed by caller. + Returned value may be NULL, if class has no parent. +*/ +LILV_API +LilvValue +lilv_plugin_class_get_parent_uri(LilvPluginClass plugin_class); + +/** + Get the URI of this plugin class. + Returned value is owned by @a plugin_class and must not be freed by caller. +*/ +LILV_API +LilvValue +lilv_plugin_class_get_uri(LilvPluginClass plugin_class); + +/** + Get the label of this plugin class, ie "Oscillators". + Returned value is owned by @a plugin_class and must not be freed by caller. +*/ +LILV_API +LilvValue lilv_plugin_class_get_label(LilvPluginClass plugin_class); + +/** + Get the subclasses of this plugin class. + Returned value must be freed by caller with lilv_plugin_classes_free. +*/ +LILV_API +LilvPluginClasses +lilv_plugin_class_get_children(LilvPluginClass plugin_class); + +/** + @} + @name Plugin Instance + @{ +*/ + +typedef struct _LilvInstanceImpl* LilvInstanceImpl; + +/** + @cond 0 +*/ + +/* Instance of a plugin. + This is exposed in the ABI to allow inlining of performance critical + functions like lilv_instance_run (simple wrappers of functions in lv2.h). + This is for performance reasons, user code should not use this definition + in any way (which is why it is not machine documented). + Truly private implementation details are hidden via @a ref pimpl. +*/ +typedef struct _Instance { + const LV2_Descriptor* lv2_descriptor; + LV2_Handle lv2_handle; + LilvInstanceImpl pimpl; +}* LilvInstance; + +/** + @endcond +*/ + +/** + Instantiate a plugin. + The returned value is a lightweight handle for an LV2 plugin instance, + it does not refer to @a plugin, or any other Lilv state. The caller must + eventually free it with lilv_instance_free. + @a features is a NULL-terminated array of features the host supports. + NULL may be passed if the host supports no additional features. + @return NULL if instantiation failed. +*/ +LILV_API +LilvInstance +lilv_plugin_instantiate(LilvPlugin plugin, + double sample_rate, + const LV2_Feature*const* features); + +/** + Free a plugin instance. + @a instance is invalid after this call. +*/ +LILV_API +void +lilv_instance_free(LilvInstance instance); + +#ifndef LILV_INTERNAL + +/** + Get the URI of the plugin which @a instance is an instance of. + Returned string is shared and must not be modified or deleted. +*/ +static inline const char* +lilv_instance_get_uri(LilvInstance instance) +{ + return instance->lv2_descriptor->URI; +} + +/** + Connect a port to a data location. + This may be called regardless of whether the plugin is activated, + activation and deactivation does not destroy port connections. +*/ +static inline void +lilv_instance_connect_port(LilvInstance instance, + uint32_t port_index, + void* data_location) +{ + instance->lv2_descriptor->connect_port + (instance->lv2_handle, port_index, data_location); +} + +/** + Activate a plugin instance. + This resets all state information in the plugin, except for port data + locations (as set by lilv_instance_connect_port). This MUST be called + before calling lilv_instance_run. +*/ +static inline void +lilv_instance_activate(LilvInstance instance) +{ + if (instance->lv2_descriptor->activate) + instance->lv2_descriptor->activate(instance->lv2_handle); +} + +/** + Run @a instance for @a sample_count frames. + If the hint lv2:hardRTCapable is set for this plugin, this function is + guaranteed not to block. +*/ +static inline void +lilv_instance_run(LilvInstance instance, + uint32_t sample_count) +{ + instance->lv2_descriptor->run(instance->lv2_handle, sample_count); +} + +/** + Deactivate a plugin instance. + Note that to run the plugin after this you must activate it, which will + reset all state information (except port connections). +*/ +static inline void +lilv_instance_deactivate(LilvInstance instance) +{ + if (instance->lv2_descriptor->deactivate) + instance->lv2_descriptor->deactivate(instance->lv2_handle); +} + +/** + Get extension data from the plugin instance. + The type and semantics of the data returned is specific to the particular + extension, though in all cases it is shared and must not be deleted. +*/ +static inline const void* +lilv_instance_get_extension_data(LilvInstance instance, + const char* uri) +{ + if (instance->lv2_descriptor->extension_data) + return instance->lv2_descriptor->extension_data(uri); + else + return NULL; +} + +/** + Get the LV2_Descriptor of the plugin instance. + Normally hosts should not need to access the LV2_Descriptor directly, + use the lilv_instance_* functions. + + The returned descriptor is shared and must not be deleted. +*/ +static inline const LV2_Descriptor* +lilv_instance_get_descriptor(LilvInstance instance) +{ + return instance->lv2_descriptor; +} + +/** + Get the LV2_Handle of the plugin instance. + Normally hosts should not need to access the LV2_Handle directly, + use the lilv_instance_* functions. + + The returned handle is shared and must not be deleted. +*/ +static inline LV2_Handle +lilv_instance_get_handle(LilvInstance instance) +{ + return instance->lv2_handle; +} + +#endif /* LILV_INTERNAL */ + +/** + @} + @name Plugin UI + @{ +*/ + +/** + Get all UIs for @a plugin. + Returned value must be freed by caller using lilv_uis_free. +*/ +LILV_API +LilvUIs +lilv_plugin_get_uis(LilvPlugin plugin); + +/** + Get the URI of a Plugin UI. + @param ui The Plugin UI + @return a shared value which must not be modified or freed. +*/ +LILV_API +LilvValue +lilv_ui_get_uri(LilvUI ui); + +/** + Get the types (URIs of RDF classes) of a Plugin UI. + @param ui The Plugin UI + @return a shared value which must not be modified or freed. + + Note that in most cases lilv_ui_is_supported should be used which finds the + UI type, avoding the need to use this function (and type specific logic). +*/ +LILV_API +LilvValues +lilv_ui_get_classes(LilvUI ui); + +/** + Check whether a plugin UI has a given type. + @param ui The Plugin UI + @param class_uri The URI of the LV2 UI type to check this UI against +*/ +LILV_API +bool +lilv_ui_is_a(LilvUI ui, LilvValue class_uri); + +/** + Function to determine whether a UI type is supported. + + This is provided by the user and must return non-zero iff using a UI of type + @c ui_type_uri in a container of type @c container_type_uri is supported. +*/ +typedef unsigned (*LilvUISupportedFunc)(const char* container_type_uri, + const char* ui_type_uri); + +/** + Return true iff a Plugin UI is supported as a given widget type. + @param ui The Plugin UI + @param supported_func User provided supported predicate. + @param container_type The widget type to host the UI within. + @param ui_type (Output) If non-NULL, set to the native type of the UI + which the caller must free with lilv_value_free. + @return The embedding quality level returned by @c supported_func. +*/ +LILV_API +unsigned +lilv_ui_is_supported(LilvUI ui, + LilvUISupportedFunc supported_func, + LilvValue container_type, + LilvValue* ui_type); + +/** + Get the URI for a Plugin UI's bundle. + @param ui The Plugin UI + @return a shared value which must not be modified or freed. +*/ +LILV_API +LilvValue +lilv_ui_get_bundle_uri(LilvUI ui); + +/** + Get the URI for a Plugin UI's shared library. + @param ui The Plugin UI + @return a shared value which must not be modified or freed. +*/ +LILV_API +LilvValue +lilv_ui_get_binary_uri(LilvUI ui); + +/** + @} + @} +*/ + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* LILV_LILV_H */ -- cgit v1.2.1