dplug 5.0.0

<img alt="logo" src="https://cdn.rawgit.com/AuburnSounds/dplug/master/logo.svg" width="200">

Dplug <a href="https://code.dlang.org/packages/dplug" title="Go to dplug"><img src="https://img.shields.io/dub/v/dplug.svg" alt="Dub version"></a>

Dplug is a library for crafting audio plugins as simply as possible. Come talk with us! if you want to learn more.

Current features

• Creating VST 2.4 plugins for Windows, macOS, and Linux, for 32-bit and 64-bit
• Creating Audio Unit v2 plugins for Mac OS X, 32-bit and 64-bit
• Comes with basic music DSP algorithms
• Comes with a number of tools to make plugin creation faster (bundling, color correction, regression tests, performance tests)
• Dplug is using Physically Based Rendering to keep installers small: http://www.auburnsounds.com/blog/2016-09-16_PBR-for-Audio-Software-Interfaces.html

Products made with Dplug

• Graillon by Auburn Sounds
• M4 Multiband Compressor by Cut Through Recordings
• Panagement by Auburn Sounds

Release notes

Read about major changes here: https://github.com/AuburnSounds/dplug/wiki/Release-notes

Tutorials

• https://github.com/AuburnSounds/dplug/wiki/Getting-Started
• https://auburnsounds.com/blog/2016-02-08_Making-a-Windows-VST-plugin-with-D.html (This tutorial is a bit outdated)

How to build plugins

For Windows:

• Use DMD >= v2.070 or LDC >= v1.1
• Install DUB, the D package manager: http://code.dlang.org/download
• Go into an example directory
• Type dub --compiler=dmd or dub --compiler=ldc2 depending on the compiler used.

For OS X:

• Use DMD >= v2.070 or LDC >= v1.0.0-b2
• Install DUB, the D package manager: http://code.dlang.org/download
• Build and use the release tool which is in the tools/release/ directory.
• Go into an example directory
• Type release --compiler dmd or release --compiler ldc depending on the compiler used.
• This tool is needed to create the whole bundle.

FAQ

• Does Dplug support the creation of synthesizer plugins?

Yes. See simple-mono-synth example.

• Am I forced to use the PBR graphics system?

No. There are people making plugins with Dplug without using PBR. How it works is that the physical channel is just filled with 0. Doing that requires a set of custom widgets.

• How do I build plugins for OS X?

You need to use the release program in the toolsdirectory. This tool create a bundle and Universal Binaries as needed. Like most D programs, you can build it by typing dub.

• What is the oldest supported Windows version?

Windows Vista. Users report plugins made with both DMD and LDC work on Windows XP. But XP isn't officially supported by D compilers.

• What is the oldest supported OS X version?

OS X 10.7+.

• What D compiler can possibly be used?

See .travis.yml for supported compilers. The latest DMD or LDC should do.

• What D compilers are recommended?

For OSX it is recommended that you use LDC-1.0.0-b2 for final binaries as no other LDC version has been as well tested with Dplug (especially it is unknown if it works on OS X 10.7).

For Windows it is necessary to use LDC >= 1.1. LDC 1.0 does not export function in DLL.

• Is Dplug stable?

Starting with v5 we'll have issue major or minor version tag for breaking changes. If you don't want breaking change, you can pin Dplug to a specific version in your dub.json. Breaking commits are marked with BREAKING in the commit backlog. They are always discussed on Discord before-hand.

• How are TODO, FUTURE and MAYDO comments defined?

TODO represent a bug a user could possibly bump into. FUTURE represent an future enhancement that could concern speed, maintainability or correctness but doesn't affect the experience much, if any. MAYDO represent things that we could want to do given enough time.

• Where do I start?

Be sure to read the Wiki in depth.

Comparison vs IPlug

Pros:

• No dispatcher-wide mutex lock. All locks are of a short duration, to avoid blocking the audio thread.
• Buffer splitting: ensure your plugin never receive a buffer larger than N samples, and the corresponding MIDI input. This helps with memory consumption for the largest buffer sizes.
• Plugin parameters implement the Observer pattern.
• Float parameters can have user-defined mapping.
• PBR-style rendering lets you have a good visual quality with less disk space.
• No need to deal with resource compilers: D can import("filename.ext") them.
• No need to maintain IDE project files, they are generated by DUB. eg: dub generate visuald or dub generate sublimetext
• No need to make Info.plist files, they are generated instead.
• No need to use Xcode whatsoever.
• No need to use a macOS SDK.
• Easy to install: DUB will download the library itself when building, a <= 2mb archive.
  
• 10x less lines of code than the next larger alternative.

Cons:

• AAX and VST3 not yet implemented
• No resizeable UI
• No HDPI support
• No modal windows

Licenses

Dplug has three different licenses depending on the part you need. For an audio plugin, you would typically need all three. I recommend that you check individual source files for license information.

Plugin format wrapping

Plugin wrapping is inspired by the WDL library (best represented here: https://github.com/olilarkin/wdl-ol).

Some files falls under the Cockos WDL license.

Important contributors to WDL include:

• Cockos: http://www.cockos.com/
• Oliver Larkin: http://www.olilarkin.co.uk/

However Dplug is far from a translation of WDL (see FAQ).

VST SDK translation

This sub-package falls under the Steinberg VST license.

VST is a trademark of Steinberg Media Technologies GmbH. Please register the SDK via the 3rd party developper license on Steinberg site.

Before you make VST plugins with Dplug, you need to read and agree with the license for the VST3 SDK by Steinberg. If you don't agree with the VST SDK license, don't make plugins with Dplug. Find the VST3 SDK there: http://www.steinberg.net/en/company/developers.html

Misc

Other source files fall under the Boost 1.0 license.

Contents of the tree

dplug:client

• Abstract plugin client interface. Currently implemented for VST and AU.

dplug:host

• Abstract plugin host interface. Basic support for VST hosting.

dplug:vst

• VST 2.4 plugin client implementation

dplug:au

• Audio Unit v2 plugin client implementation

dplug:window

• implements windowing for Win32, X11, Cocoa and Carbon

dplug:gui

• Needed for plugins that do have an UI
• Toolkit includes common widgets (knob, slider, switch, logo, level, label...)
• Physically Based Renderer for a fully procedural UI

dplug:dsp

• Basic support for audio processing:
  • Real and Complex FFT, windowing functions (STFT with overlap and zero-phase windowing)
  • FIR, 1st order IIR filters and RBJ biquads
  • mipmapped wavetables for antialiased oscillators
  • noise generation including white/pink/demo noise
  • various kinds of smoothers and envelopes
  • delay-line and interpolation

dplug:derelict-nogc

• Enables dynamic library loading without using the D runtime

dplug:carbon

• Dynamic Carbon bindings

dplug:cocoa

• Dynamic Cocoa bindings

dplug:x11

• Static X11 bindings

Examples

• examples/distort: mandatory distortion plugin
• examples/ms-encode: simplest plugin for tutorial purpose
• examples/simple-mono-synth: very basic sine-wave generator
• examples/window: for windowing testing

Tools

• tools/pbr-sketch: playground for creating plugin background textures
• tools/release: DUB frontend to build Mac bundles and use LDC with proper envvars
• tools/process: plugin host for testing audio processing speed/reproducibility
• tools/wav-compare: comparison of WAV files
• tools/stress-plugin: makes multiple load of plugins while processing audio mainly to test GUI opening speed
• Lift-Gamma-Gain-Contrast: adjust color correction curves on a finished UI http://www.gamesfrommars.fr/lift-gamma-gain-contrast/