323 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
		
		
			
		
	
	
			323 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
|   | --- | ||
|  | layout: home | ||
|  | title: The libsndfile Home Page | ||
|  | --- | ||
|  | 
 | ||
|  | Libsndfile is a C library for reading and writing files containing sampled sound | ||
|  | (such as MS Windows WAV and the Apple/SGI AIFF format) through one standard | ||
|  | library interface. It is released in source code format under the | ||
|  | [Gnu Lesser General Public License](http://www.gnu.org/copyleft/lesser.html). | ||
|  | 
 | ||
|  | The library was written to compile and run on a Linux system but should compile | ||
|  | and run on just about any Unix (including MacOS X). | ||
|  | There are also pre-compiled binaries available for 32 and 64 bit windows. | ||
|  | 
 | ||
|  | It was designed to handle both little-endian (such as WAV) and big-endian (such | ||
|  | as AIFF) data, and to compile and run correctly on little-endian (such as Intel | ||
|  | and DEC/Compaq Alpha) processor systems as well as big-endian processor systems | ||
|  | such as Motorola 68k, Power PC, MIPS and Sparc. Hopefully the design of the | ||
|  | library will also make it easy to extend for reading and writing new sound file | ||
|  | formats. | ||
|  | 
 | ||
|  | It has been compiled and tested (at one time or another) on the following | ||
|  | systems: | ||
|  | 
 | ||
|  | * Every platform supported by Debian GNU/Linux including x86_64-linux-gnu, | ||
|  |   i486-linux-gnu, powerpc-linux-gnu, sparc-linux-gnu, alpha-linux-gnu, | ||
|  |   mips-linux-gnu and armel-linux-gnu. | ||
|  | * powerpc-apple-darwin7.0 (Mac OS X 10.3) | ||
|  | * sparc-sun-solaris2.8 (using gcc) | ||
|  | * mips-sgi-irix5.3 (using gcc) | ||
|  | * QNX 6.0 | ||
|  | * i386-unknown-openbsd2.9 | ||
|  | * Microsoft Windows | ||
|  | 
 | ||
|  | At the moment, each new release is being tested on i386 Linux, x86_64 Linux, | ||
|  | PowerPC Linux, Win32 and Win64. | ||
|  | 
 | ||
|  | ## Features
 | ||
|  | 
 | ||
|  | libsndfile has the following main features : | ||
|  | 
 | ||
|  | * Ability to read and write a large number of [file formats](formats.html). | ||
|  | * A simple, elegant and easy to use Applications Programming Interface. | ||
|  | * Usable on Unix, Win32, MacOS and others. | ||
|  | * On the fly format conversion, including endian-ness swapping, type conversion | ||
|  |   and bitwidth scaling. | ||
|  | * Optional normalisation when reading floating point data from files containing | ||
|  |   integer data. | ||
|  | * Ability to open files in read/write mode. | ||
|  | * The ability to write the file header without closing the file (only on files | ||
|  |   open for write or read/write). | ||
|  | * Ability to query the library about all supported formats and retrieve text | ||
|  |   strings describing each format. | ||
|  | 
 | ||
|  | libsndfile has a comprehensive test suite so that each release is as bug free | ||
|  | as possible. | ||
|  | When new bugs are found, new tests are added to the test suite to ensure that | ||
|  | these bugs don't creep back into the code. | ||
|  | When new features are added, tests are added to the test suite to make sure that | ||
|  | these features continue to work correctly even when they are old features. | ||
|  | 
 | ||
|  | ## History
 | ||
|  | 
 | ||
|  | My first attempt at reading and writing WAV files was in 1990 or so under | ||
|  | Windows 3.1. I started using Linux in early 1995 and contributed some code to | ||
|  | the [wavplay](http://www.vaxxine.com/ve3wwg/gnuwave.html) program. That | ||
|  | contributed code would eventually mutate into this library. As one of my | ||
|  | interests is Digital Signal Processing (DSP) I decided that as well as reading | ||
|  | data from an audio file in the native format (typically 16 bit short integers) | ||
|  | it would also be useful to be able to have the library do the conversion to | ||
|  | floating point numbers for DSP applications. It then dawned on me that whatever | ||
|  | file format (anything from 8 bit unsigned chars, to 32 bit floating point | ||
|  | numbers) the library should be able to convert the data to whatever format the | ||
|  | library user wishes to use it in. For example, in a sound playback program, the | ||
|  | library caller typically wants the sound data in 16 bit short integers to dump | ||
|  | into a sound card even though the data in the file may be 32 bit floating point | ||
|  | numbers (ie Microsoft's WAVE_FORMAT_IEEE_FLOAT format). Another example would be | ||
|  | someone doing speech recognition research who has recorded some speech as a 16 | ||
|  | bit WAV file but wants to process it as double precision floating point numbers. | ||
|  | 
 | ||
|  | Here is the release history for libsndfile: | ||
|  | 
 | ||
|  | * Version 0.0.8 (Feb 15 1999) First official release. | ||
|  | * Version 0.0.28 (Apr 26 2002) Final release of version 0 of libsndfile. | ||
|  | * Version 1.0.0rc1 (Jun 24 2002) Release candidate 1 of version 1 of libsndfile. | ||
|  | * Version 1.0.0rc6 (Aug 14 2002) MacOS 9 fixes. | ||
|  | * Version 1.0.0 (Aug 16 2002) First 1.0.X release. | ||
|  | * Version 1.0.1 (Sep 14 2002) Added MAT4 and MAT5 file formats. | ||
|  | * Version 1.0.2 (Nov 24 2002) Added VOX ADPCM format. | ||
|  | * Version 1.0.3 (Dec 09 2002) Fixes for Linux on ia64 CPUs. | ||
|  | * Version 1.0.4 (Feb 02 2003) New file formats and functionality. | ||
|  | * Version 1.0.5 (May 03 2003) One new file format and new functionality. | ||
|  | * Version 1.0.6 (Feb 08 2004) Large file fix for Linux/Solaris, new | ||
|  |   functionality   and Win32 improvements. | ||
|  | * Version 1.0.7 (Feb 24 2004) Fix build problems on MacOS X and fix ia64/MIPS | ||
|  |   etc clip mode detection. | ||
|  | * Version 1.0.8 (Mar 14 2004) Minor bug fixes. | ||
|  | * Version 1.0.9 (Mar 30 2004) Add AVR format. Improve handling of some WAV | ||
|  |   files. | ||
|  | * Version 1.0.10 (Jun 15 2004) Minor bug fixes. Fix support for Win32 MinGW | ||
|  |   compiler. | ||
|  | * Version 1.0.11 (Nov 15 2004) Add SD2 file support, reading of loop data in WAV | ||
|  |   and AIFF. Minor bug fixes. | ||
|  | * Version 1.0.12 (Sep 30 2005) Add FLAC and CAF file support, virtual I/O | ||
|  |   interface. Minor bug fixes and cleanups. | ||
|  | * Version 1.0.13 (Jan 21 2006) Add read/write of instrument chunks. Minor bug | ||
|  |   fixes. | ||
|  | * Version 1.0.14 (Feb 19 2006) Minor bug fixes. Start shipping windows | ||
|  |   binary/source ZIP. | ||
|  | * Version 1.0.15 (Mar 16 2006) Minor bug fixes. | ||
|  | * Version 1.0.16 (Apr 30 2006) Add support for RIFX. Other minor feature | ||
|  |   enhancements and bug fixes. | ||
|  | * Version 1.0.17 (Aug 31 2006) Add C++ wrapper sndfile.hh. Minor bug fixes and | ||
|  |   cleanups. | ||
|  | * Version 1.0.18 (Feb 07 2009) Add Ogg/Vorbis support, remove captive | ||
|  |   libraries, many new features and bug fixes. Generate Win32 and Win64 | ||
|  |   pre-compiled binaries. | ||
|  | * Version 1.0.19 (Mar 02 2009) Fix for CVE-2009-0186. Huge number of minor fixes | ||
|  |   as a result of static analysis. | ||
|  | * Version 1.0.20 (May 14 2009) Fix for potential heap overflow. | ||
|  | * Version 1.0.21 (December 13 2009) Bunch of minor bug fixes. | ||
|  | * Version 1.0.22 (October 04 2010) Bunch of minor bug fixes. | ||
|  | * Version 1.0.23 (October 10 2010) Minor bug fixes. | ||
|  | * Version 1.0.24 (March 23 2011) Minor bug fixes. | ||
|  | * Version 1.0.25 (July 13 2011) Fix for Secunia Advisory SA45125. Minor bug | ||
|  |   fixes and improvements. | ||
|  | * Version 1.0.26 (November 22 2015) Fix for CVE-2014-9496, CVE-2014-9756 and | ||
|  |   CVE-2015-7805. Add ALAC/CAF support. Minor bug fixes and improvements. | ||
|  | * Version 1.0.27 (June 19 2016) Fix a seek regression in 1.0.26. Add metadata | ||
|  |   read/write for CAF and RF64. FIx PAF endian-ness issue. | ||
|  | * Version 1.0.28 (April 2 2017) Fix buffer overruns in FLAC and ID3 handling | ||
|  |   code. Reduce default header memory requirements. Fix detection of Large File | ||
|  |   Support for 32 bit systems. | ||
|  | * Version 1.0.29 (August 15 2020) Opus support, build system improvements and | ||
|  |   bug fixes. | ||
|  | * Version 1.0.30 (September 19 2020) Bugfix release. Fix file descriptor leaks | ||
|  |   in sf_open_fd () function. Fix critical CMake bug leading to broken ABI on | ||
|  |   Linux platforms. Other numerous fixes to CMake build system, consider it | ||
|  |   stable now. Fix some memory leaks. Fix handling of some SD2 files. Update | ||
|  |   documentation. Integrate GitHub Actions for faster test builds and Oss-Fuzz | ||
|  |   for fuzzing tests. Move sndfile.h.in from src/ to include/ directory. To avoid | ||
|  |   problems, delete old generated sndfile.h from $(top_builddir)/src. | ||
|  | * Version 1.0.31 (January 24 2021) Bugfix release. Fix multiple memory leaks | ||
|  |   reported by OSS-Fuzz. More SSE2-optimized functions for x86 and amd64. | ||
|  | * Version 1.1.0 (March 27 2022) Minor release, backward compatible with previous | ||
|  |   releases. Added long-awaited MP3 support. Numerous improvements and bugfixes. | ||
|  | * Version 1.2.0 (December 25 2022) Various bugfixes, | ||
|  |   removed artificial samplerate limit | ||
|  | * Version 1.2.1 (August 12 2023) Patch release, various bugfixes. | ||
|  | * Version 1.2.2 (August 13 2023) Patch release, various bugfixes. | ||
|  | 
 | ||
|  | ## Similar or Related Projects
 | ||
|  | 
 | ||
|  | * [SoX](http://sox.sourceforge.net/) is a program for converting between sound | ||
|  |   file formats. | ||
|  | * [Wavplay](http://www.hitsquad.com/smm/programs/WavPlay/) started out as a | ||
|  |   minimal WAV file player under Linux and has mutated into Gnuwave, a | ||
|  |   client/server application for more general multimedia and games sound | ||
|  |   playback. | ||
|  | * [Audiofile](http://www.68k.org/~michael/audiofile/) (libaudiofile) is a | ||
|  |   library similar to libsndfile but with a different programming interface. The | ||
|  |   author Michael Pruett has set out to clone (and fix some bugs in) the | ||
|  |   libaudiofile library which ships with SGI's IRIX OS. | ||
|  | * [sndlib.tar.gz](ftp://ccrma-ftp.stanford.edu/pub/Lisp/sndlib.tar.gz) is | ||
|  |   another library written by Bill Schottstaedt of CCRMA. | ||
|  | 
 | ||
|  | ## Licensing
 | ||
|  | 
 | ||
|  | libsndfile is released under the terms of the GNU Lesser General Public License, | ||
|  | of which there are two versions; | ||
|  | [version 2.1](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html) | ||
|  | and | ||
|  | [version 3](http://www.gnu.org/copyleft/lesser.html). | ||
|  | To maximise the compatibility of libsndfile, the user may choose to use | ||
|  | libsndfile under either of the above two licenses. | ||
|  | You can also read a simple explanation of the ideas behind the GPL and the LGPL | ||
|  | [here](http://www.gnu.org/copyleft/lesser.html). | ||
|  | 
 | ||
|  | You can use libsndfile with | ||
|  | [Free Software](http://www.gnu.org/), | ||
|  | [Open Source](http://www.opensource.org/), | ||
|  | proprietary, shareware or other closed source applications as long as libsndfile | ||
|  | is used as a dynamically loaded library and you abide by a small number of other | ||
|  | conditions (read the LGPL for more info). | ||
|  | With applications released under the GNU GPL you can also use libsndfile | ||
|  | statically linked to your application. | ||
|  | 
 | ||
|  | I would like to see libsndfile used as widely as possible but I would prefer it | ||
|  | if you released software that uses libsndfile as | ||
|  | [Free Software](http://www.gnu.org/) | ||
|  | or | ||
|  | [Open Source](http://www.opensource.org/). | ||
|  | However, if you put in a great deal of effort building a significant application | ||
|  | which simply uses libsndfile for file I/O, then I have no problem with you | ||
|  | releasing that as closed source and charging as much money as you want for it as | ||
|  | long as you abide by [the license](http://www.gnu.org/copyleft/lesser.html). | ||
|  | 
 | ||
|  | ## Download
 | ||
|  | 
 | ||
|  | Check latest version on | ||
|  | [GitHub Releases page](https://github.com/libsndfile/libsndfile/releases/). | ||
|  | 
 | ||
|  | Binaries and source packages are signed by current releaser David Seifert aka | ||
|  | @SoapGentoo. You can verify signatures with his public GPG key: | ||
|  | 
 | ||
|  | ``` | ||
|  | -----BEGIN PGP PUBLIC KEY BLOCK----- | ||
|  | Version: GnuPG v2 | ||
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|  | pAuHs14YL7Wiy0aJQnfbCpRzPq3kYyOXmhmY7lPWO0WdUpR6W8wUbleK5XOVDDRx | ||
|  | aIC/M3hhDOxZOMzQ+pdn4BaOFQQ0ygsRkqOudbuc0R1giYRt1i6gMeT8gfzL9jlw | ||
|  | HcJ+aVnxdUQQ4uC47oKo/+lg7qh7LsiW79pQC1Bcdm8lhRmqtxe6ub60ecjax3XU | ||
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|  | uhaccpwc9EJtf744GS0SXa2AXr32j56n7CFcEjFcIQPBC6OJn6eA3hOVUYGZ7SrT | ||
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|  | M6eTDb5z0G5uLXh6+dYxtDOlPogI5OHd+G51LwCjvrQ+AtIUCgafuemwA9mpFT2b | ||
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|  | 6qURyNjOfG4aPJIATwuh4GSNuxUG40+yuT+XfQF24mu1esS1J3wzRloJ7w== | ||
|  | =K3x+ | ||
|  | -----END PGP PUBLIC KEY BLOCK----- | ||
|  | ``` | ||
|  | 
 | ||
|  | ## See Also
 | ||
|  | 
 | ||
|  | * [sndfile-tools](https://github.com/libsndfile/sndfile-tools): a small | ||
|  | collection of programs which use libsndfile. |