VST 3 Interfaces: IStreamAttributes Class Reference
Author: Steinberg

VST 3 Interfaces VST 3.8 SDK for developing VST plug-in

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Public Member Functions | Static Public Attributes | List of all members
IStreamAttributes Class Referenceabstract

Meta attributes of a stream: Vst::IStreamAttributes. More...

`#include <ivstattributes.h>`

Inheritance diagram for IStreamAttributes:

## Public Member Functions
virtual tresult | getFileName (String128 name)=0
| Gets filename (without file extension) of the stream.
virtual IAttributeList * | getAttributes ()=0
| Gets meta information list.
Public Member Functions inherited from FUnknown
virtual tresult | queryInterface (const TUID _iid, void **obj)=0
virtual uint32 | addRef ()=0
virtual uint32 | release ()=0

## Static Public Attributes
static const FUID | iid
Static Public Attributes inherited from FUnknown
static const FUID | iid

## Detailed Description

Meta attributes of a stream: Vst::IStreamAttributes.

- [host imp]
- [extends IBStream]
- [released: 3.6.0]
- [optional]

Interface to access preset meta information from stream, for example used in setState\getState in order to inform the plug-in about the current context in which the preset loading\saving occurs (Project context or Preset load\save (see StateType)) or used to get the full file path of the loaded preset (if available).

//------------------------------------------------------------------------
#include "pluginterfaces/base/ustring.h"
#include "pluginterfaces/vst/vstpresetkeys.h"
...
tresult PLUGIN_API MyPlugin::setState (IBStream* state)
{
FUnknownPtr<IStreamAttributes> stream (state);
if (stream)
{
if (IAttributeList* list = stream->getAttributes ())
{
// get the current type (project/Default..) of this state
String128 string;
if (list->getString (PresetAttributes::kStateType, string, 128 * sizeof (TChar)) ==
kResultTrue)
{
UString128 tmp (string);
char ascii[128];
tmp.toAscii (ascii, 128);
if (strncmp (ascii, StateType::kProject, strlen (StateType::kProject)) == 0)
{
// we are in project loading context...
}
}
// get the full file path of this state
TChar fullPath[1024];
if (list->getString (PresetAttributes::kFilePathStringType, fullPath,
1024 * sizeof (TChar)) == kResultTrue)
{
// here we have the full path ...
}
}
}
//...read the state here.....
return kResultTrue;
}
Steinberg::FUnknownPtr
Steinberg::IBStream
Steinberg::Vst::IAttributeList
Attribute list used in IMessage and IStreamAttributes: Vst::IAttributeList.
Definition ivstattributes.h:41
Steinberg::Vst::PresetAttributes::kFilePathStringType
const CString kFilePathStringType
Full file path string (if available) where the preset comes from (be sure to use a bigger string when...
Definition vstpresetkeys.h:41
Steinberg::Vst::PresetAttributes::kStateType
const CString kStateType
Type of the given state see StateType : Project / Default Preset or Normal Preset.
Definition vstpresetkeys.h:40
Steinberg::UString128
UStringBuffer< 128 > UString128
Steinberg::Vst::StateType::kProject
const CString kProject
the state is restored from a project loading or it is saved in a project
Definition vstpresetkeys.h:57
Steinberg::Vst::String128
TChar String128[128]
128 character UTF-16 string
Definition vsttypes.h:78
Steinberg::Vst::TChar
char16 TChar
UTF-16 character.
Definition vsttypes.h:77
Steinberg::kResultTrue
kResultTrue
ustring.h
vstpresetkeys.h

## Member Function Documentation

## ◆ getFileName()

virtual tresult getFileName | ( | String128 | name | ) |
| pure virtual

Gets filename (without file extension) of the stream.

## ◆ getAttributes()

virtual IAttributeList * getAttributes | ( |  | ) |
| pure virtual

Gets meta information list.

## Member Data Documentation

## ◆ iid

const FUID iid
| static

Empty

Copyright © Steinberg Media Technologies GmbH. All Rights Reserved. This documentation is under this license.