VSTPluginFormatHeadless Class Reference

Implements a plugin format manager for VSTs. More...

Inheritance diagram for VSTPluginFormatHeadless:

Classes
class	ExtraFunctions
	Base class for some extra functions that can be attached to a VST plugin instance. More...

Public Member Functions
	VSTPluginFormatHeadless ()=default
String	getName () const override
	Returns the format name.
bool	canScanForPlugins () const override
	Returns true if this format needs to run a scan to find its list of plugins.
bool	isTrivialToScan () const override
	Should return true if this format is both safe and quick to scan - i.e.
void	findAllTypesForFile (OwnedArray< PluginDescription > &, const String &fileOrIdentifier) override
	This tries to create descriptions for all the plugin types available in a binary module file.
bool	fileMightContainThisPluginType (const String &fileOrIdentifier) override
	Should do a quick check to see if this file or directory might be a plugin of this format.
String	getNameOfPluginFromIdentifier (const String &fileOrIdentifier) override
	Returns a readable version of the name of the plugin that this identifier refers to.
bool	pluginNeedsRescanning (const PluginDescription &) override
	Returns true if this plugin's version or date has changed and it should be re-checked.
StringArray	searchPathsForPlugins (const FileSearchPath &, bool recursive, bool) override
	Searches a suggested set of directories for any plugins in this format.
bool	doesPluginStillExist (const PluginDescription &) override
	Checks whether this plugin could possibly be loaded.
FileSearchPath	getDefaultLocationsToSearch () override
	Returns the typical places to look for this kind of plugin.
virtual void	aboutToScanVSTShellPlugin (const PluginDescription &)
	Can be overridden to receive a callback when each member of a shell plugin is about to be tested during a call to findAllTypesForFile().
Public Member Functions inherited from AudioPluginFormat
	~AudioPluginFormat () override
	Destructor.
std::unique_ptr< AudioPluginInstance >	createInstanceFromDescription (const PluginDescription &, double initialSampleRate, int initialBufferSize)
	Tries to recreate a type from a previously generated PluginDescription.
std::unique_ptr< AudioPluginInstance >	createInstanceFromDescription (const PluginDescription &, double initialSampleRate, int initialBufferSize, String &errorMessage)
	Same as above but with the possibility of returning an error message.
void	createPluginInstanceAsync (const PluginDescription &description, double initialSampleRate, int initialBufferSize, PluginCreationCallback)
	Tries to recreate a type from a previously generated PluginDescription.
virtual void	createARAFactoryAsync (const PluginDescription &, ARAFactoryCreationCallback callback)
	Tries to create an ARAFactoryWrapper for this description.

Static Public Member Functions
static const XmlElement *	getVSTXML (AudioPluginInstance *plugin)
	Attempts to retrieve the VSTXML data from a plugin.
static bool	loadFromFXBFile (AudioPluginInstance *plugin, const void *data, size_t dataSize)
	Attempts to reload a VST plugin's state from some FXB or FXP data.
static bool	saveToFXBFile (AudioPluginInstance *plugin, MemoryBlock &result, bool asFXB)
	Attempts to save a VST's state to some FXP or FXB data.
static bool	getChunkData (AudioPluginInstance *plugin, MemoryBlock &result, bool isPreset)
	Attempts to get a VST's state as a chunk of memory.
static bool	setChunkData (AudioPluginInstance *plugin, const void *data, int size, bool isPreset)
	Attempts to set a VST's state from a chunk of memory.
static AudioPluginInstance *	createCustomVSTFromMainCall (void *entryPointFunction, double initialSampleRate, int initialBufferSize)
	Given a suitable function pointer to a VSTPluginMain function, this will attempt to instantiate and return a plugin for it.
static void	setExtraFunctions (AudioPluginInstance *plugin, ExtraFunctions *functions)
	Provides an ExtraFunctions callback object for a plugin to use.
static pointer_sized_int JUCE_CALLTYPE	dispatcher (AudioPluginInstance *, int32, int32, pointer_sized_int, void *, float)
	This simply calls directly to the VST's AEffect::dispatcher() function.
static AudioPluginInstance *	getPluginInstanceFromVstEffectInterface (void *aEffect)
	Given a VstEffectInterface* (aka vst::AEffect*), this will return the juce AudioPluginInstance that is being used to wrap it.
static String	getFormatName ()

Additional Inherited Members
Public Types inherited from AudioPluginFormat
using	PluginCreationCallback = std::function<void (std::unique_ptr<AudioPluginInstance>, const String&)>
	A callback lambda that is passed to createPluginInstanceAsync()
using	ARAFactoryCreationCallback = std::function<void (ARAFactoryResult)>
	A callback lambda that is passed to getARAFactory()
Protected Member Functions inherited from AudioPluginFormat
	AudioPluginFormat ()

Detailed Description

Implements a plugin format manager for VSTs.

Constructor & Destructor Documentation

VSTPluginFormatHeadless()

VSTPluginFormatHeadless::VSTPluginFormatHeadless ( )

default

Referenced by aboutToScanVSTShellPlugin().

Member Function Documentation

getVSTXML()

const XmlElement * VSTPluginFormatHeadless::getVSTXML ( AudioPluginInstance * plugin )

static

Attempts to retrieve the VSTXML data from a plugin.

Will return nullptr if the plugin isn't a VST, or if it doesn't have any VSTXML.

loadFromFXBFile()

bool VSTPluginFormatHeadless::loadFromFXBFile ( AudioPluginInstance * plugin, const void * data, size_t dataSize )

static

Attempts to reload a VST plugin's state from some FXB or FXP data.

saveToFXBFile()

bool VSTPluginFormatHeadless::saveToFXBFile ( AudioPluginInstance * plugin, MemoryBlock & result, bool asFXB )

static

Attempts to save a VST's state to some FXP or FXB data.

getChunkData()

bool VSTPluginFormatHeadless::getChunkData ( AudioPluginInstance * plugin, MemoryBlock & result, bool isPreset )

static

Attempts to get a VST's state as a chunk of memory.

setChunkData()

bool VSTPluginFormatHeadless::setChunkData ( AudioPluginInstance * plugin, const void * data, int size, bool isPreset )

static

Attempts to set a VST's state from a chunk of memory.

createCustomVSTFromMainCall()

AudioPluginInstance * VSTPluginFormatHeadless::createCustomVSTFromMainCall ( void * entryPointFunction, double initialSampleRate, int initialBufferSize )

static

Given a suitable function pointer to a VSTPluginMain function, this will attempt to instantiate and return a plugin for it.

setExtraFunctions()

void VSTPluginFormatHeadless::setExtraFunctions ( AudioPluginInstance * plugin, ExtraFunctions * functions )

static

Provides an ExtraFunctions callback object for a plugin to use.

The plugin will take ownership of the object and will delete it automatically.

dispatcher()

pointer_sized_int JUCE_CALLTYPE VSTPluginFormatHeadless::dispatcher ( AudioPluginInstance * , int32 , int32 , pointer_sized_int , void * , float  )

static

This simply calls directly to the VST's AEffect::dispatcher() function.

References JUCE_CALLTYPE.

getPluginInstanceFromVstEffectInterface()

AudioPluginInstance * VSTPluginFormatHeadless::getPluginInstanceFromVstEffectInterface ( void * aEffect )

static

Given a VstEffectInterface* (aka vst::AEffect*), this will return the juce AudioPluginInstance that is being used to wrap it.

getFormatName()

String VSTPluginFormatHeadless::getFormatName ( )

static

Referenced by getName().

getName()

String VSTPluginFormatHeadless::getName ( ) const

overridevirtual

Returns the format name.

E.g. "VST", "AudioUnit", etc.

Implements AudioPluginFormat.

References getFormatName().

canScanForPlugins()

bool VSTPluginFormatHeadless::canScanForPlugins ( ) const

overridevirtual

Returns true if this format needs to run a scan to find its list of plugins.

Implements AudioPluginFormat.

isTrivialToScan()

bool VSTPluginFormatHeadless::isTrivialToScan ( ) const

overridevirtual

Should return true if this format is both safe and quick to scan - i.e.

if a file can be scanned within a few milliseconds on a background thread, without actually needing to load an executable.

Implements AudioPluginFormat.

findAllTypesForFile()

void VSTPluginFormatHeadless::findAllTypesForFile ( OwnedArray< PluginDescription > & results, const String & fileOrIdentifier )

overridevirtual

This tries to create descriptions for all the plugin types available in a binary module file.

The file will be some kind of DLL or bundle.

Normally there will only be one type returned, but some plugins (e.g. VST shells) can use a single DLL to create a set of different plugin subtypes, so in that case, each subtype is returned as a separate object.

Implements AudioPluginFormat.

fileMightContainThisPluginType()

bool VSTPluginFormatHeadless::fileMightContainThisPluginType ( const String & fileOrIdentifier )

overridevirtual

Should do a quick check to see if this file or directory might be a plugin of this format.

This is for searching for potential files, so it shouldn't actually try to load the plugin or do anything time-consuming.

Implements AudioPluginFormat.

getNameOfPluginFromIdentifier()

String VSTPluginFormatHeadless::getNameOfPluginFromIdentifier ( const String & fileOrIdentifier )

overridevirtual

Returns a readable version of the name of the plugin that this identifier refers to.

Implements AudioPluginFormat.

pluginNeedsRescanning()

bool VSTPluginFormatHeadless::pluginNeedsRescanning ( const PluginDescription & )

overridevirtual

Returns true if this plugin's version or date has changed and it should be re-checked.

Implements AudioPluginFormat.

searchPathsForPlugins()

StringArray VSTPluginFormatHeadless::searchPathsForPlugins ( const FileSearchPath & directoriesToSearch, bool recursive, bool allowPluginsWhichRequireAsynchronousInstantiation )

overridevirtual

Searches a suggested set of directories for any plugins in this format.

The path might be ignored, e.g. by AUs, which are found by the OS rather than manually.

Parameters

directoriesToSearch	This specifies which directories shall be searched for plug-ins.
recursive	Should the search recursively traverse folders.
allowPluginsWhichRequireAsynchronousInstantiation	If this is false then plug-ins which require asynchronous creation will be excluded.

Implements AudioPluginFormat.

doesPluginStillExist()

bool VSTPluginFormatHeadless::doesPluginStillExist ( const PluginDescription & )

overridevirtual

Checks whether this plugin could possibly be loaded.

It doesn't actually need to load it, just to check whether the file or component still exists.

Implements AudioPluginFormat.

getDefaultLocationsToSearch()

FileSearchPath VSTPluginFormatHeadless::getDefaultLocationsToSearch ( )

overridevirtual

Returns the typical places to look for this kind of plugin.

Note that if this returns no paths, it means that the format doesn't search in files or folders, e.g. AudioUnits.

Implements AudioPluginFormat.

aboutToScanVSTShellPlugin()

virtual void VSTPluginFormatHeadless::aboutToScanVSTShellPlugin ( const PluginDescription & )

virtual

Can be overridden to receive a callback when each member of a shell plugin is about to be tested during a call to findAllTypesForFile().

Only the name and uid members of the PluginDescription are guaranteed to be valid when this is called.

References VSTPluginFormatHeadless().