SDL_sound

SDL_sound is a library that handles the decoding of several popular sound file formats, such as .WAV and .MP3. It is meant to make the programmer's sound playback tasks simpler. The programmer gives SDL_sound a filename, or feeds it data directly from one of many sources, and then reads the decoded waveform data back at her leisure. If resource constraints are a concern, SDL_sound can process sound data in programmer-specified blocks. Alternately, SDL_sound can decode a whole sound file and hand back a single pointer to the whole waveform. SDL_sound can also handle sample rate, audio format, and channel conversion on-the-fly and behind-the-scenes, if the programmer desires.

As the name implies, SDL_sound is an add-on to Simple Directmedia Layer, and as such, you'll need it to build and use SDL_sound. SDL gives us lots of convenience for porting and implementing some elements of the library, not to mention that it is a powerful, cross platform answer to DirectX. You should definitely look into it, whether you use SDL_sound or not.

Places SDL_sound is known to be used:

• Procedural Arts' innovative interactive drama, Façade, uses SDL_sound to decode audio in the Mac OS X version.
• PopCap uses SDL_sound for the Mac OS X versions of Feeding Frenzy, Pizza Frenzy, and Iggle Pop! (and maybe others).
• The Ambient Music System uses SDL_sound in its player module.
• The popular game glTron uses SDL_sound for sound playback.
• Dominik Haumann wrote in to mention C++ wrappers for SDL_sound, which can be found here.
• MusicBox, a GNUstep music manager, uses SDL_sound to decode various audio formats.
• The SuSE Linux distribution has been known to package SDL_sound.
• Gentoo Linux distributes SDL_sound via their "portage" system. Just "emerge sdl-sound".
• FreeBSD has SDL_sound in their Ports tree: here're the details.
• NetBSD appears to have packaged SDL_sound: details.
• Debian has packaged SDL_sound, too: details.
• ROCK Linux has an SDL_sound package: details.
• Arch Linux publishes an official SDL_sound package. Details.
• Ubuntu Linux has an SDL_sound package: details.
• Probably other places. Email me if you want to be listed here.

What works:

• Support for "decoding" raw audio samples.
• Support for decoding Microsoft WAVE audio files (uncompressed and MS-ADPCM encoded waveforms are supported, currently) (.WAV).
• Support for decoding various MPEG audio files through SMPEG (.MP3, .MPG, .MPEG).
• Support for decoding MPEG-1 Layer 3 audio files internally (makes use of LGPL'd code from mpg123.) (.MP3).
• Support for decoding MIDI music files (.MIDI, .MID).
• Support for decoding Ogg Vorbis audio files through libvorbis (.OGG).
• Support for decoding Speex voice files through libspeex (.SPX).
• Support for decoding FLAC audio files through libFLAC (.FLAC, .FLA).
• Support for decoding Creative Labs Voice files (.VOC).
• Support for decoding Audio Interchange File Format files (.AIFF).
• Support for decoding Shorten-compressed audio data (.SHN).
• Support for Sun's audio format (.AU).
• Support for decoding through MikMod. (.MOD, .IT, .XM, .S3M, .MTM, .669, .STM, .ULT, .FAR, .MED, .AMF, .DSM, .IMF, .GDM, .STX, .OKT).
• Support for decoding through ModPlug. (.669, .AMF, .AMS, .DBM, .DMF, .DSM, .FAR, .IT, .MDL, .MED, .MOD, .MT2, .MTM, .OKT, .PTM, .PSM, .S3M, .STM, .ULT, .UMX, .XM)
• Experimental support for decoding through Apple Quicktime (MacOS only).
• Compiles/runs on Linux (x86 tested).
• Compiles/runs on Linux (x86-64 tested).
• Compiles/runs on Linux (PowerPC tested).
• Compiles/runs on FreeBSD (x86 tested).
• Compiles/runs on Win32 (x86 tested).
• Compiles/runs on MacOS Classic (PowerPC tested).
• Compiles/runs on MacOS X (PowerPC tested).
• Compiles/runs on BeOS (x86 tested).
• Compiles/runs on WinCE/PocketPC (StrongARM tested).
• May compile and run elsewhere with little to no modification. Success stories and patches are welcome.

• Support for more forms of compressed .WAV files is planned, but not yet implemented.
• Support for various forms of compressed .AIFF files is planned, but not yet implemented.
• Contributions of other ports are, of course, welcome.

SDL_sound is licensed under the GNU Lesser General Public License version 2.1 (or newer, at your option). Those interested in a closed-source license may contact me about licensing fees.

A Doxygen-generated API reference can be found here. You can generate your own HTML, manpage, LaTeX, RTF, etc documents with this program; download the SDL_sound source and use the included Doxyfile.

Prepackaged source code and binaries:

• Here is the CHANGELOG.
• Here are the latest officially released binaries and source. Please be aware that we do not make a habit of building binaries for any platform, and when we do, we don't support them. Use the source, or find a distro you trust to prepackage them for you (see several at the top of this page).
• This page has SDL_sound RPMs for LSB-compliant distros such as SuSE. Regular, developer, and source RPMs available.
• SourceMage maintains an SDL_sound package.
• If you are interested in maintaining packages for various platforms (MacOS X, Windows, etc), please drop me a line.

Downloading with Mercurial:

SDL_sound's source code may be downloaded using Mercurial (aka: "hg"). Hg allows you to get up-to-the-minute fixes and enhancements; as a developer works on a source tree, you can use hg to mirror that source tree instead of waiting for an official release. Please look at the Mercurial website for more information on using hg, where you can also download software for Mac OS X, Windows, and Unix systems.

SDL_sound is no longer hosted in a CVS or Subversion repository. You have to use hg or wait for an official release.

Here is the web interface to SDL_sound's Mercurial repository.

To download SDL_sound via Mercurial:

hg clone hg.icculus.org/icculus/SDL_sound/
...or, for the stable (non-development) branch:
hg clone -r stable-1.0 hg.icculus.org/icculus/SDL_sound/

There is a mailing list for SDL_sound available. To subscribe, head to the mailman page. Then, to send mail to the list, write to sdlsound@icculus.org.

Page maintained by Ryan C. Gordon.

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