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livetrax/doc/source_tree_layout.txt

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Ardour Source-Tree layout (April 2020)
===== Front Ends =====
gtk2_ardour/
The main Ardour GUI -- This is where most of the complexity is :)
It is cleanly separated from the backend and processing engine.
headless/
hardour -- headless Ardour, mostly demo-code how to use Ardour without a GUI.
session_utils/
command-line tools using libardour (e.g. export)
luasession/
arlua -- commandline interface to libardour
vst
wine application top-level (WindowsVST on Linux)
===== LIBRARIES =====
A collection of libraries and utility functions. While most are shared
libraries, they're pretty much exclusive to Ardour.
libs/
**** Independent libs ****
- appleutility
Utility Classes, abstraction for CoreAudio and AudioUnits (OSX, macOS)
- ardouralsautil
Utility Class for device-listing (used by the jack and ALSA backends).
Device-reservation comandline tool (linked against libdbus), which is
also available from https://github.com/x42/alsa_request_device
- clearlooks-newer
GTK theme engine (used by gtk2_ardour)
- fluidsynth
Stripped down (library only) and slightly customized version of fluidsynth
use tools/update_fluidsynth.sh to update from upstream
- hidapi
Unmodified https://github.com/signal11/hidapi for interaction with some
control surfaces (Push2, NI Maschine)
- libltc
Unmodified https://github.com/x42/libltc/ for Linear Timecode en/decoding
- lua
Lua Script interpreter and C++ class abstraction
- libs/lua/lua-5.3.5 is unmodified upstream Lua-5.3.5
- libs/lua/LuaBridge is a highly customized version of
https://github.com/vinniefalco/LuaBridge (C++ bindings)
- midi++2
(uses libpdb)
MIDI parsing, MIDNAM handling, Port abstraction for I/O
- ptformat
Unmodified https://github.com/zamaudio/ptformat for loading ProTools sessions
- temporal
various utility code for dealing with different kinds of time,
including Timecode (FPS) and musical time conversions
- qm-dsp
Stripped down version of https://github.com/c4dm/qm-dsp
The Queen Mary DSP library is used by VAMP Plugins
- vamp-plugins
VAMP plugins for audio analysis and offline processing (uses qm-dsp)
- vamp-pyin
VAMP plugins for pitch and note-tracking (uses qm-dsp), offline analyis
- vfork
A exec-wrapper which redirects file-descriptors to be used with vfork(2)
- plugins
LV2 Plugins included with Ardour. These are currently mostly
independent (a-fluidsynth uses libfluidsynth).
Most of them are custom version of existing plugins (zamaudio, x42),
that have been customized to be bundled with Ardour on all platforms
tha ardour runs on.
- zita-convolver
convolution kernel, so far only avialable to Lua scripts.
- zita-resampler
Efficient resampler with variable rate, useful for adaptive resampling.
Mainly used for vari-speed playback.
**** PBD dependent libs ****
- pbd
Generic non-Ardour-specific utility classes. This is the basis for all Ardour specifics.
It provides basic concepts and OS abstractions. The name comes from "Paul
Barton-Davis", Paul's full name at the time he started working on working on
audio software.
- evoral
(uses libpbd)
Control events, control lists, automation evaluation,
parameter descriptions, incl MIDI event abstraction
- libsmf (contains several non-upstreamed fixes)
(used inside evoral)
Handling Standard MIDI File format. Abstracted to C++ in SMF.{cc,h}
- backends
(uses libpdb, ardouralsautil | appleutility, implements libardour interface)
Interaction with Operating System's Audio/MIDI API:
ALSA, CoreAudio, JACK, PortAudio/ASIO, Pulseaudio
- surfaces
(uses libpbd, libevoral, libtimecode, libardour ;; libgtkmm2ext, libcanvas)
Control Surfaces, dynamically loaded by libardour on runtime,
to remote-control ardour (midi bindings, network etc).
- panners
(uses libpdb, implements libardour interface)
Pan plugins (stereo-balance, VBAP, etc) are dynamically loaded at runtime.
- audiographer
(uses libpdb)
Mini Ardour inside Ardour to export audio-files from sessions.
- fst
(uses libpbd, implements external methods for libardour and gtk2ardour)
VST scanner tool and abstraction for Windows-VSTs to be used with
wine or MS windows.
- ardour
(uses pretty much all the libs above)
This is it. libardour runs Ardour sessions
All realtime processing happens here, plugins are managed etc.
**** UI related libs ****
- gtkmm2ext
(uses libpbd)
Utility Library to extend GDK, GTK, and basic abstraction for UIs
and event-loops. This library is not limited to the GUI, but also
used for other graphical interfaces (e.g. Push2, NI Maschine control
surfaces).
- canvas
(uses libpbd, libgtkmm2ext)
Cairo Canvas, provides a slate for scalable drawing and basic layout/packing
This is used by gtk2ardour's main editor.
- widgets
(uses libpbd, libgtkmm2ext ;; libcanvas utils/colors)
Ardour GUI widgets (buttons, fader, knobs, etc)
- waveview
(uses libpbd, libgtkmm2ext, canvas, libardour)
Threaded waveform rendering and waveform image cache
===== RESOURCE FILES =====
These are bundled as-is.
share/export/
Export Presets
share/mcp/
Mackie control surface device files
share/midi_maps/
Generic MIDI control surface presets
share/osc/
Configuration presets for the OSC control surface
share/patchfiles/
MIDNAM files, MIDI synth descriptions (note-names, CC, PGM names)
share/scripts/
Lua scripts (files with a leading underscore are not bundled)
see also share/scripts/README
share/templates/
Session templates (currently none)
===== MISC =====
doc/
Misc developer oriented documentation files and Doxygen
patches/
Some .diff files for the build-stack.
tools/
Various developer tools, most notably packaging scripts