- General instructions
- Building on Linux
- Building on macOS
- Building for iOS
- Building on Windows
- Building for Android and Java integration
- FFT and resampler selection
- Other supported #defines
- Copyright notes for bundled libraries
Full configurable build. The primary supported build system for Rubber Band on all platforms is Meson (https://mesonbuild.com). The Meson build system can be used to build all targets (static and dynamic library, command-line utility, and plugins) and to cross-compile. See below for details.
Single-file build. If you want to include Rubber Band in a C++
project and would prefer not to build it as a separate library, there
is a single .cpp file at single/RubberBandSingle.cpp which can be
added to your project as-is. It produces a single compilation-unit
build using the built-in FFT and resampler implementations with no
further library dependencies. See the comments at the top of that file
for more information.
Other build options. If you only need a static library and don't
wish to use Meson, some alternative build files (Makefiles and Visual
C++ projects) are included in the otherbuilds directory. See the
platform-specific build sections below for more details.
To build with Meson, ensure Meson and Ninja are installed and run:
$ meson setup build && ninja -C build
This checks for necessary dependencies, reports what it finds, and if
all is well, builds the code into a subdirectory called build. It
will build everything it can find the requisite dependencies for:
static and dynamic libraries, LADSPA, LV2, and Vamp plugins, and
command-line utility.
Some configuration options are provided, described in the
meson_options.txt file. To set one of these, add a -D option to
Meson:
$ meson setup build -Dipp_path=/opt/intel/ipp
The options are documented in the library- and platform-specific sections below.
You can also enable or disable these optional build components:
jni- Java/JVM (JNI) interface to Rubber Band Libraryladspa- LADSPA version of example pitch-shifter pluginlv2- LV2 version of example pitch-shifter pluginvamp- Vamp analysis plugin, mostly used for development debuggingcmdline- Therubberbandandrubberband-r3command-line utilitiestests- Unit tests
The default behaviour is to check whether the requirements for these are found on the system and build them only if they are.
To force a component not to be built even when its requirements are
available, set the corresponding flag to disabled, e.g.
$ meson setup build -Djni=disabled
To require a component to be built (and therefore fail if its
requirements are not met), set it to enabled. You can also use the
special Meson auto_features flag to set all features to disabled
unless explicitly enabled, e.g.
$ meson setup build -Dauto_features=disabled -Dcmdline=enabled
By default the build produces both static and dynamic library targets. To produce only one of these, use either
$ meson setup build -Ddefault_library=static
$ meson setup build -Ddefault_library=shared
Rubber Band Library is written entirely in C++ and requires a C++11 compiler. It is unlikely to make any difference (performance or otherwise) which C++ standard you compile with, as long as it's no older than C++11.
If you are building this software using either of the Speex or KissFFT
library options, please be sure to review the terms for those
libraries in src/ext/speex/COPYING and src/ext/kissfft/COPYING as
applicable.
Optionally, if you want the command-line tool and plugins to be built,
first install libsndfile and the LADSPA, LV2, and Vamp plugin headers
so they can be found using pkg-config. Then
$ meson setup build && ninja -C build
See "FFT and resampler selection" below for further build options.
Alternatively, if you only need the static library and prefer a Makefile, try
$ make -f otherbuilds/Makefile.linux
Ensure the Xcode command-line tools are installed, and if you want the command-line tool to be built, also install libsndfile.
To build for the default architecture:
$ meson setup build && ninja -C build
Which architecture is the default may depend on the version of Meson and/or the current shell. To force a particular architecture you can use a Meson cross-file, as follows.
To build for Apple Silicon (arm64):
$ meson setup build --cross-file cross/macos-arm64.txt && ninja -C build
To build for Intel (x86_64):
$ meson setup build --cross-file cross/macos-x86_64.txt && ninja -C build
You can build a universal binary library for both architectures like this:
$ meson setup build --cross-file cross/macos-universal.txt && ninja -C build
Note that the universal cross file also sets the minimum OS version to
the earliest supported macOS versions for both architectures. (In
practice, compatibility will also depend on how the dependent
libraries have been compiled.) You can edit this in the
cross/macos-universal.txt file if you want a specific target.
See "FFT and resampler selection" below for further build options.
Note that you cannot legally distribute applications using Rubber Band in the Mac App Store, unless you have first obtained a commercial licence for Rubber Band Library. GPL code is not permitted in the app store. See https://breakfastquay.com/technology/license.html for commercial terms.
Ensure the Xcode command-line tools are installed, and
$ meson setup build_ios --cross-file cross/ios.txt && ninja -C build_ios
The output files will be found in the build_ios directory.
To build for the simulator,
$ meson setup build_sim --cross-file cross/ios-simulator.txt && ninja -C build_sim
The output files will be found in the build_sim directory.
See "FFT and resampler selection" below for further build options.
Note that you cannot legally distribute applications using Rubber Band in the iOS App Store, unless you have a first obtained a commercial licence for Rubber Band Library. GPL code is not permitted in the app store. See https://breakfastquay.com/technology/license.html for commercial terms.
If you only need to build the static library for integration into your
project, and you prefer a Visual Studio project file, you can find a
simple one in otherbuilds\rubberband-library.vcxproj.
The rest of this section describes the "full" build system, which uses Meson, just as on the other platforms. To build this way, first ensure Meson and Ninja are installed and available. Then, in a terminal window with the compiler tools available in the path (e.g. a Visual Studio command-line prompt for the relevant build architecture) run
> meson setup build
> ninja -C build
The output files will be found in the build directory.
The Rubber Band code is compatible with both the traditional Visual
C++ compiler (cl) and the Clang front-end (clang), and the build
system will use whichever appears (first) in your path.
To build against a specific Visual C++ runtime, use the built-in Meson
option b_vscrt:
> meson setup build -Db_vscrt=mt
Accepted arguments include mt for the static runtime (libcmt),
md for the dynamic one (msvcrt), mtd for the static debug
runtime, and mdd for the dynamic debug one.
See "FFT and resampler selection" below for further build options.
Currently only a very old Android NDK build file is provided, as
otherbuilds/Android.mk. This includes compile definitions for a
shared library built for ARM architectures which can be loaded from a
Java application using the Java native interface (i.e. the Android
NDK).
The Java side of the interface can be found in
com/breakfastquay/rubberband/RubberBandStretcher.java.
See https://hg.sr.ht/~breakfastquay/rubberband-android-simple-sample for a very trivial example of integration with Android Java code.
The supplied .mk file uses KissFFT and the Speex resampler.
Rubber Band requires the selection of library code for FFT calculation
and resampling. Several libraries are supported. The selection is
controlled (in Meson) using -D options and (in the code itself)
using preprocessor flags set by the build system. These options and
flags are detailed in the tables below.
At least one resampler implementation and one FFT implementation must be enabled. It is technically possible to enable more than one, but it's confusing and not often useful.
If you are building this software using the bundled Speex or KissFFT
library code, please be sure to review the terms for those libraries
in src/ext/speex/COPYING and src/ext/kissfft/COPYING as applicable.
If you are proposing to package Rubber Band for a Linux distribution,
please select either the built-in FFT (the default) or FFTW
(-Dfft=fftw), and either the built-in resampler (the default) or
libsamplerate (-Dresampler=libsamplerate).
On some configurations (e.g. 32-bit platforms) libsamplerate is much faster than the built-in resampler, and it makes a reasonable choice for platform builds for which you don't know the requirements of any specific application.
The choice of FFT library makes no difference to output quality, only to processing speed.
Library Build option CPP define Notes
---- ------------ ---------- -----
Built-in -Dfft=builtin -DUSE_BUILTIN_FFT Default except on macOS/iOS.
vDSP -Dfft=vdsp -DHAVE_VDSP Default on macOS/iOS (in
the Accelerate framework).
Best option on these platforms.
FFTW3 -Dfft=fftw -DHAVE_FFTW3 A bit faster than built-in,
a bit slower than vDSP.
GPL with commercial option.
SLEEF -Dfft=sleef -DHAVE_SLEEF Usually very fast. Not as widely
distributed as FFTW3. Requires
both libsleef and libsleefdft.
BSD-ish licence.
KissFFT -Dfft=kissfft -DHAVE_KISSFFT Single precision.
Only advisable when using
single-precision sample type
(see below).
BSD-ish licence.
Intel IPP -Dfft=ipp -DHAVE_IPP Very fast on Intel hardware.
Proprietary, can only be used with
Rubber Band commercial licence.
The choice of resampler affects both output quality, when pitch-shifting, and CPU usage.
Library Build option CPP define Notes
------- ------------ ---------- -----
Built-in -Dresampler=builtin -DUSE_BQRESAMPLER Default.
Intended to give high quality
for time-varying pitch shifts
in real-time mode.
Not the fastest option;
especially slow in 32-bit
builds.
libsamplerate -Dresampler=libsamplerate -DHAVE_LIBSAMPLERATE Good choice in most cases.
High quality; usually a bit
faster than the built-in option;
much faster in 32-bit builds.
BSD-ish licence.
libspeexdsp -Dresampler=libspeexdsp -DHAVE_LIBSPEEXDSP Very fast.
May not be artifact-free for
time-varying pitch shifts.
BSD-ish licence.
Bundled Speex -Dresampler=speex -DUSE_SPEEX Older Speex code, bundled for
compatibility with some existing
projects.
Avoid for new projects.
Other known preprocessor symbols are as follows. (Usually the supplied build files will handle these for you.)
-DLACK_BAD_ALLOC
Define on systems lacking std::bad_alloc in the C++ library.
-DLACK_POSIX_MEMALIGN
Define on systems lacking posix_memalign.
-DUSE_OWN_ALIGNED_MALLOC
Define on systems lacking any aligned malloc implementation.
-DLACK_SINCOS
Define on systems lacking sincos().
-DNO_EXCEPTIONS
Build without use of C++ exceptions.
-DNO_THREADING
Build without any multithread support.
-DUSE_PTHREADS
Use the pthreads library (required unless NO_THREADING or on Windows)
-DPROCESS_SAMPLE_TYPE=float
Select single precision for internal calculations. The default is
double precision. Consider in conjunction with single-precision
KissFFT for mobile architectures with slower double-precision
support.
-DUSE_POMMIER_MATHFUN
Select the Julien Pommier implementations of trig functions for ARM
NEON or x86 SSE architectures. These are usually faster but may be
of lower precision than system implementations. Consider using this
for 32-bit mobile architectures.
[files in src/ext/speex]
Copyright 2002-2007 Xiph.org Foundation
Copyright 2002-2007 Jean-Marc Valin
Copyright 2005-2007 Analog Devices Inc.
Copyright 2005-2007 Commonwealth Scientific and Industrial Research
Organisation (CSIRO)
Copyright 1993, 2002, 2006 David Rowe
Copyright 2003 EpicGames
Copyright 1992-1994 Jutta Degener, Carsten Bormann
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
[files in src/ext/kissfft]
Copyright (c) 2003-2004 Mark Borgerding
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the author nor the names of any contributors may be used
to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
[files in src/ext/pommier]
Copyright (C) 2011 Julien Pommier
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
[files in src/ext/float_cast]
Copyright (C) 2001 Erik de Castro Lopo <erikd AT mega-nerd DOT com>
Permission to use, copy, modify, distribute, and sell this file for any
purpose is hereby granted without fee, provided that the above copyright
and this permission notice appear in all copies. No representations are
made about the suitability of this software for any purpose. It is
provided "as is" without express or implied warranty.
[files in src/ext/getopt, used by command-line tool on some platforms]
Copyright (c) 2000 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Dieter Baron and Thomas Klausner.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the NetBSD
Foundation, Inc. and its contributors.
4. Neither the name of The NetBSD Foundation nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
[files in rubberband-dll and rubberband-sharp]
Copyright 2018-2019 Jonathan Gilbert
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use, copy,
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of the Software, and to permit persons to whom the Software is
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The above copyright notice and this permission notice shall be
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CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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Except as contained in this notice, the name of Jonathan Gilbert
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