MPEG Audio Decoder: Difference between revisions

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'''MPEG Audio Decoder''' ([[MAD]]), also known as libmad, is a [[GPL]] [[Library_(computer_science)|library]] to decode files that have been encoded with an [[MPEG]] [[Audio_codec|audio codec]], produced by Underbit Technologies.

{{Notability|Products|date=August 2011}}

{{refimprove|date=November 2011}}

}}

{{Infobox software

|name = madplay

|screenshot =

|caption =

|developer = Robert Leslie

|released = 2000

|latest_release_version = 0.15.2b

|latest_release_date = {{release date|2004|02|23}}

|operating_system = [[Linux]], [[FreeBSD]], [[macOS]]

|programming language = [[C (programming language)|C]]

|genre = [[media player (software)|Media player]]

|license = [[GPL#Version_2|GPLv2]]<ref>{{cite web |title=GNU General Public License |url=https://www.underbit.com/resources/license/gpl |website=underbit |accessdate=6 September 2019}}</ref>

|website = {{URL|underbit.com/products/mad/}}

|repo = {{URL|https://sourceforge.net/projects/mad/}}

}}

'''MPEG Audio Decoder''' (MAD) is a [[GPL]] [[Library (computer science)|library]] for decoding files that have been encoded with an [[MPEG]] [[audio codec]].<ref name="linux-sound mpeg players encoders">{{cite web | url=http://www.linux-sound.org/mpeg.html | title=MPEG Players & Encoders | publisher=linux-sound.org | accessdate=November 3, 2011 | quote=MAD Robert Leslie's GPL'd MPEG audio decoder}}</ref> It was written by Robert Leslie and produced by Underbit Technologies. It was developed as a new implementation, on the [[ISO/IEC]] standards.<ref name="freecode mad">{{cite web | url=http://freecode.com/projects/libmad | title=MAD | publisher=[[Freecode]] | accessdate=November 3, 2011 | quote=MAD is a high-quality MPEG audio decoder capable of 24-bit output. All computations are performed with fixed-point integer arithmetic, making it ideal for systems without a floating-point unit. The implementation is entirely new, based on the ISO/IEC standards.}}</ref>

It consists of libmad, a software library, and madplay, a command-line program for MP3 playback. libmad is notable for using only [[fixed-point arithmetic]]<ref name="freecode mad" /><ref name="mp3-tech mpeg source codes">{{cite web | url=http://www.mp3-tech.org/programmer/decoding.html | title=MPEG source codes | publisher=mp3-tech.org | accessdate=November 3, 2011 | quote=MAD is an mpeg-1 decoder using only integer computation.}}</ref><ref name="manpages.ubuntu.com madplay">{{cite web | url=http://manpages.ubuntu.com/manpages/oneiric/man1/madplay.1.html | title=madplay | publisher=Ubuntu Manpage Repository | accessdate=November 3, 2011 | quote=Among the special features of MAD are 24-bit PCM resolution and 100% fixed-point (integer) computation. | url-status=dead | archiveurl=https://web.archive.org/web/20120404160612/http://manpages.ubuntu.com/manpages/oneiric/man1/madplay.1.html | archivedate=April 4, 2012 }}</ref> while madplay is notable for its [[ReplayGain]] support.

Development ended decades ago, and vulnerabilities identified since then have gone unpatched.<ref>{{Cite web |title=CVE - CVE-2017-8373 |url=https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8373 |access-date=2024-02-13 |website=cve.mitre.org}}</ref><ref>{{Cite web |title=CVE - CVE-2017-8374 |url=https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8374 |access-date=2024-02-13 |website=cve.mitre.org}}</ref><ref>{{Cite web |title=CVE - CVE-2017-11552 |url=https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11552 |access-date=2024-02-13 |website=cve.mitre.org}}</ref>

==References==

{{Reflist}}

==External links==

*[http://www.underbit.com/products/mad/ MAD's home page]

*[httphttps://sourceforge.net/projects/mad/ MAD's SourceForge page]

*[http://www.chiariglione.org/mpeg/ Official MPEG web site] {{Webarchive|url=https://web.archive.org/web/20081109215716/http://www.chiariglione.org/mpeg/ |date=2008-11-09 }}

{{Compression Software Implementations}}

{{Compression formats}}

[[Category:Free audio codecs]]

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