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authorDavid Robillard <d@drobilla.net>2012-09-16 16:55:52 +0000
committerDavid Robillard <d@drobilla.net>2012-09-16 16:55:52 +0000
commit3bbce7c5437aea1243bcd556f6b2232564cb3ab3 (patch)
tree468b997ce01c49a6b9c39548afc4883d71313396 /lv2/lv2plug.in/ns
parent4afc3523bb7148b7b4417b79519bca214927d2f1 (diff)
downloadlv2-3bbce7c5437aea1243bcd556f6b2232564cb3ab3.tar.xz
Replace LV2_Morph_Interface with more general LV2_Options_Interface.
Diffstat (limited to 'lv2/lv2plug.in/ns')
-rw-r--r--lv2/lv2plug.in/ns/ext/morph/morph.h84
-rw-r--r--lv2/lv2plug.in/ns/ext/morph/morph.ttl60
-rw-r--r--lv2/lv2plug.in/ns/ext/options/options.h95
-rw-r--r--lv2/lv2plug.in/ns/ext/options/options.ttl36
4 files changed, 148 insertions, 127 deletions
diff --git a/lv2/lv2plug.in/ns/ext/morph/morph.h b/lv2/lv2plug.in/ns/ext/morph/morph.h
index 3c8ec46..6739d39 100644
--- a/lv2/lv2plug.in/ns/ext/morph/morph.h
+++ b/lv2/lv2plug.in/ns/ext/morph/morph.h
@@ -29,88 +29,6 @@
#define LV2_MORPH__MorphPort LV2_MORPH_PREFIX "MorphPort"
#define LV2_MORPH__interface LV2_MORPH_PREFIX "interface"
#define LV2_MORPH__supportsType LV2_MORPH_PREFIX "supportsType"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum {
- LV2_MORPH_SUCCESS = 0, /**< Completed successfully. */
- LV2_MORPH_ERR_UNKNOWN = 1, /**< Unknown error. */
- LV2_MORPH_ERR_BAD_TYPE = 2, /**< Unsupported type. */
- LV2_MORPH_ERR_BAD_PORT = 3 /**< Port is not morphable. */
-} LV2_Morph_Status;
-
-/** A port property. */
-typedef struct {
- LV2_URID key; /**< Key (predicate) */
- uint32_t size; /**< Value size */
- LV2_URID type; /**< Value type */
- const void* value; /**< Value (object) */
-} LV2_Morph_Property;
-
-/** The interface provided by a plugin to support morph ports. */
-typedef struct {
- /**
- Morph a port to a different type.
-
- This function is in the audio threading class.
-
- This function MAY return an error, in which case the port's type was not
- changed. If the type was changed and the plugin has AutoMorphPort
- ports, the host MUST check the type of every AutoMorphPort using the
- port_type() function since they may have changed.
-
- This function MUST gracefully handle being called for ports that are not
- MorpPorts by ignoring the request and returning LV2_MORPH_ERR_BAD_PORT.
-
- A NULL-terminated array of additional properties to set on the port may
- be passed via @p properties. These properties and their values are
- owned by the caller and valid only for the duration of the call.
-
- @param instance The plugin instance.
- @param port The index of the port to change the type of.
- @param type The new port type URID.
- @param properties Additional properties to set, or NULL.
- */
- LV2_Morph_Status (*morph_port)(LV2_Handle instance,
- uint32_t port,
- LV2_URID type,
- const LV2_Morph_Property*const* properties);
-
- /**
- Get the type of an AutoMorphPort.
-
- This function is in the audio threading class.
-
- If the plugin has no auto morph ports, this field may be NULL. This
- function may only be called for ports which are AutoMorphPorts.
-
- This function MAY return 0, which indicates that the current
- configuration of MorphPort types is invalid and the port is
- non-functional. If the port is not lv2:connectionOptional, then the
- plugin MUST NOT be used.
-
- The @p properties parameter may be used to get additional properties of
- the port. To do so, the host passes a NULL-terminated property array
- with keys set to the desired properties and all other fields zeroed.
- The plugin sets these fields appropriately if possible. The data
- pointed to is owned by the plugin and only valid until the next call to
- a method on this plugin (this mechanism is only meant for accessing
- simple properties, such as buffer size).
-
- @param instance The plugin instance.
- @param port The index of the port to return the type of.
- @param properties Additional properties to get, or NULL.
- @return The current type of the port.
- */
- LV2_URID (*port_type)(LV2_Handle instance,
- uint32_t port,
- LV2_Morph_Property*const* properties);
-} LV2_Morph_Interface;
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
+#define LV2_MORPH__currentType LV2_MORPH_PREFIX "currentType"
#endif /* LV2_MORPH_H */
diff --git a/lv2/lv2plug.in/ns/ext/morph/morph.ttl b/lv2/lv2plug.in/ns/ext/morph/morph.ttl
index 09351b1..9457089 100644
--- a/lv2/lv2plug.in/ns/ext/morph/morph.ttl
+++ b/lv2/lv2plug.in/ns/ext/morph/morph.ttl
@@ -1,10 +1,11 @@
@prefix doap: <http://usefulinc.com/ns/doap#> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
+@prefix morph: <http://lv2plug.in/ns/ext/morph#> .
+@prefix opts: <http://lv2plug.in/ns/ext/options#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
-@prefix morph: <http://lv2plug.in/ns/ext/morph#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
<http://lv2plug.in/ns/ext/morph>
@@ -15,11 +16,14 @@
lv2:documentation """
<p>This extension defines two port types: morph:MorphPort, which has a
host-configurable type, and morph:AutoMorphPort, which may automatically change
-type when a MorphPort type is changed. These ports always have a default type
-and work normally work in hosts that are unaware of this extension. Thus, this
-extension provides a backwards compatibility mechanism which allows plugins to
-use new port types but gracefully fall back to a default type in hosts that do
-not support them.</p>
+type when a MorphPort's type is changed. These ports always have a default
+type and work normally work in hosts that are unaware of this extension. Thus,
+this extension provides a backwards compatibility mechanism which allows
+plugins to use new port types but gracefully fall back to a default type in
+hosts that do not support them.</p>
+
+<p>This extension only defines port types and properties for describing morph
+ports. The actual run-time switching is done via the opts:interface API.</p>
""" .
morph:MorphPort
@@ -30,13 +34,12 @@ morph:MorphPort
lv2:documentation """
<p>Ports of this type MUST have another type which defines the default buffer
format (e.g. lv2:ControlPort) but can be dynamically changed to a different
-type in hosts that support morph:interface.</p>
+type in hosts that support opts:interface.</p>
-<p>The host may change the type of a MorphPort by calling
-LV2_Morph_Interface::morph_port(). If the plugin has any morph:AutoMorphPort
+<p>The host may change the type of a MorphPort by setting its morph:currentType
+with LV2_Options_Interface::set(). If the plugin has any morph:AutoMorphPort
ports, the host MUST check their types after changing any port type since they
-may have changed.</p>
-""" .
+may have changed.</p> """ .
morph:AutoMorphPort
a rdfs:Class ,
@@ -48,31 +51,36 @@ morph:AutoMorphPort
format (e.g. lv2:ControlPort) but may dynamically change types based on the
configured types of any morph:MorphPort ports on the same plugin instance.</p>
-<p>The type of a port may only change in response to a call to
-LV2_Morph_Interface::morph_port(), i.e. ports can only change type as a result
-of an explicit host request. Whenever any port type on the instance changes,
-the host MUST check the type of all morph:AutoMorphPort ports on the instance
-before calling run() again, since they may have changed.</p>
+<p>The type of a port may only change in response to a host call to
+LV2_Options_Interface::set(). Whenever any port type on the instance changes,
+the host MUST check the type of all morph:AutoMorphPort ports with
+LV2_Options_Interface::get() before calling run() again, since they may have
+changed. If the type of any port is zero, it means the current configuration
+is invalid and the plugin may not be run (unless that port is
+lv2:connectionOptional and connected to NULL).</p>
<p>This is mainly useful for outputs whose type depends on the type of
corresponding inputs.</p>
""" .
-morph:interface
- a lv2:ExtensionData ;
+morph:supportsType
+ a rdf:Property ,
+ owl:ObjectProperty ;
+ rdfs:domain morph:MorphPort ;
+ rdfs:label "supports type" ;
lv2:documentation """
-<p>The interface provided by the plugin to support morph ports. To support
-this extension, the plugin must return a LV2_Morph_Interface from
-LV2_Descriptor::extension_data() when it is called with this URI
-(LV2_MORPH__interface).</p>
+<p>Indicates that a port supports being switched to a certain type. A
+MorphPort MUST list each type it supports being switched to in the plugin data
+using this property.</p>
""" .
-morph:supportsType
+morph:currentType
a rdf:Property ,
+ opts:Option ,
owl:ObjectProperty ;
rdfs:domain morph:MorphPort ;
- rdfs:label "supports type" ;
+ rdfs:label "current type" ;
lv2:documentation """
-<p>Indicates that a port supports being switched to a certain type via
-morph:interface.</p>
+<p>The currently active type of the port. This is for dynamic use as an option
+and SHOULD NOT be listed in the static plugin data.</p>
""" .
diff --git a/lv2/lv2plug.in/ns/ext/options/options.h b/lv2/lv2plug.in/ns/ext/options/options.h
index 089464a..1a71a3e 100644
--- a/lv2/lv2plug.in/ns/ext/options/options.h
+++ b/lv2/lv2plug.in/ns/ext/options/options.h
@@ -20,11 +20,13 @@
#include <stdint.h>
#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
+#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
#define LV2_OPTIONS_URI "http://lv2plug.in/ns/ext/options"
#define LV2_OPTIONS_PREFIX LV2_OPTIONS_URI "#"
#define LV2_OPTIONS__Option LV2_OPTIONS_PREFIX "Option"
+#define LV2_OPTIONS__interface LV2_OPTIONS_PREFIX "interface"
#define LV2_OPTIONS__options LV2_OPTIONS_PREFIX "options"
#define LV2_OPTIONS__requiredOption LV2_OPTIONS_PREFIX "requiredOption"
#define LV2_OPTIONS__supportedOption LV2_OPTIONS_PREFIX "supportedOption"
@@ -34,18 +36,95 @@ extern "C" {
#endif
/**
- An instantiation time option.
+ The context of an Option, which defines the subject it applies to.
+*/
+typedef enum {
+ /**
+ This option applies to the instance itself. The subject must be
+ ignored.
+ */
+ LV2_OPTIONS_INSTANCE,
+
+ /**
+ This option applies to some named resource. The subject is a URI mapped
+ to an integer (a LV2_URID, like the key)
+ */
+ LV2_OPTIONS_RESOURCE,
+
+ /**
+ This option applies to some blank node. The subject is a blank node
+ identifier, which is valid only within the current local scope.
+ */
+ LV2_OPTIONS_BLANK,
- An array of these is passed to the instantiate method in a Feature with URI
- LV2_OPTIONS__options .
+ /**
+ This option applies to a port on the instance. The subject is the
+ port's index.
+ */
+ LV2_OPTIONS_PORT
+} LV2_Options_Context;
+
+/**
+ An option.
+
+ This is a property with a subject, also known as a triple or statement.
+
+ This struct is useful anywhere a statement needs to be passed where no
+ memory ownership issues are present (since the value is a const pointer).
+
+ Options can be passed to an instance via the feature LV2_OPTIONS__options
+ with data pointed to an array of options terminated by a zeroed option, or
+ accessed/manipulated using LV2_Options_Interface.
*/
-typedef struct {
- LV2_URID key; /**< Key (a property URID). */
- uint32_t size; /**< Size of value in bytes. */
- LV2_URID type; /**< Type of value (a datatype URID). */
- const void* value; /**< Pointer to value. */
+typedef struct _LV2_Options_Option {
+ LV2_Options_Context context; /**< Context (type of subject). */
+ uint32_t subject; /**< Subject. */
+ LV2_URID key; /**< Key (property). */
+ uint32_t size; /**< Size of value in bytes. */
+ LV2_URID type; /**< Type of value (datatype). */
+ const void* value; /**< Pointer to value (object). */
} LV2_Options_Option;
+/** A status code for option functions. */
+typedef enum {
+ LV2_OPTIONS_SUCCESS = 0, /**< Completed successfully. */
+ LV2_OPTIONS_ERR_UNKNOWN = 1, /**< Unknown error. */
+ LV2_OPTIONS_ERR_BAD_SUBJECT = 1 << 1, /**< Invalid/unsupported subject. */
+ LV2_OPTIONS_ERR_BAD_KEY = 1 << 2, /**< Invalid/unsupported key. */
+ LV2_OPTIONS_ERR_BAD_VALUE = 1 << 3 /**< Invalid/unsupported value. */
+} LV2_Options_Status;
+
+/**
+ Interface for dynamically setting options (LV2_OPTIONS__interface).
+*/
+typedef struct _LV2_Options_Interface {
+ /**
+ Get the given options.
+
+ Each element of the passed options array MUST have type, subject, and
+ key set. All other fields (size, type, value) MUST be initialised to
+ zero, and are set to the option value if such an option is found.
+
+ This function is in the "instantiation" LV2 threading class, so no other
+ instance functions may be called concurrently.
+
+ @return Bitwise OR of LV2_Options_Status values.
+ */
+ uint32_t (*get)(LV2_Handle instance,
+ LV2_Options_Option* options);
+
+ /**
+ Set the given options.
+
+ This function is in the "instantiation" LV2 threading class, so no other
+ instance functions may be called concurrently.
+
+ @return Bitwise OR of LV2_Options_Status values.
+ */
+ uint32_t (*set)(LV2_Handle instance,
+ const LV2_Options_Option* options);
+} LV2_Options_Interface;
+
#ifdef __cplusplus
} /* extern "C" */
#endif
diff --git a/lv2/lv2plug.in/ns/ext/options/options.ttl b/lv2/lv2plug.in/ns/ext/options/options.ttl
index c66aff3..12ac4aa 100644
--- a/lv2/lv2plug.in/ns/ext/options/options.ttl
+++ b/lv2/lv2plug.in/ns/ext/options/options.ttl
@@ -11,18 +11,17 @@
<../../meta/meta.ttl> ,
<lv2-options.doap.ttl> ;
lv2:documentation """
-<p>This extension defines a facility for <q>options</q>, which are parameters
-passed to a plugin, UI, or other instance at instantiation time. Like the
-command-line <em>options</em> of a program, options do not change over the
-lifetime of an instance.</p>
-<p>Because they are available at instantiation time, options are useful for
-adding parameters which are not suitable for dynamic control, such as those
-that require expensive pre-computation. They are also useful for providing
-information which would not otherwise be available.</p>
+<p>This extension defines a facility for <q>options</q>, which are dynamic
+properties that may be changed at run time.</p>
-<p>Options are provided to instances by the host via the opts:options
-feature.</p>
+<p>There are two facilities for passing options to an instance: opts:options
+allows passing options at instantiation time, and the opts:interface interface
+allows options to be dynamically set and retrieved after instantiation.</p>
+
+<p>Note that this extension is only for allowing hosts to configure plugins,
+and is not a <q>live</q> control mechanism. For real-time control, use
+event-based control via an atom:AtomPort with an atom:Sequence buffer.</p>
<p>Instances may indicate they <q>require</q> an option with the
opts:requiredOption property, or that they optionally <q>support</q> an option
@@ -43,6 +42,23 @@ given this type for documentation purposes, and to assist hosts in discovering
option definitions.</p>
""" .
+opts:interface
+ a lv2:ExtensionData ;
+ lv2:documentation """
+<p>An interface (LV2_Options_Interface) for dynamically setting and getting
+options. Note this is intended for use by the host for configuring plugins
+only, and and is <em>not</em> a <q>live</q> plugin control mechanism.</p>
+
+<p>The plugin data file should describe this like so:</p>
+<pre class="turtle-code">
+@prefix opts: &lt;http://lv2plug.in/ns/ext/options#&gt; .
+
+&lt;plugin&gt;
+ a lv2:Plugin ;
+ lv2:extensionData opts:interface .
+</pre>
+""" .
+
opts:options
a lv2:Feature ;
rdfs:label "options" ;