mad-dev November 2001

mad-dev@lists.mars.org

7 participants
5 discussions

Annonce: madlld 1.0 --- Mad low-level demonstration/decoder
by Bertrand Petit 20 Nov '01

20 Nov '01

The first release of madlld is available at <URL:http://www.bsd-kd.dk/~elrond/audio/madlld/>. This program is a "how to" about libmad's low-level API. The intended use of this program is to serve as tutorial or demonstration for programmers wiling to learn how the currently undocumented library API can be used. As a side effect the program can be used to decode MPEG audio streams to raw PCM samples. Mad is available at <URL:http://www.mars.org/home/rob/proj/mpeg/>. -- %!PS 297.6 420.9 translate 90 rotate 0 setgray gsave 0 1 1{pop 0 180 moveto 100 180 170 100 170 -10 curveto 180 -9 180 -9 190 -10 curveto 190 100 100 180 0 180 curveto fill 180 rotate}for grestore/Bookman-LightItalic findfont 240 scalefont setfont -151.536392 -63.7998886 moveto (bp)show showpage

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MMIOMP3
by roconnor＠Math.Berkeley.EDU 19 Nov '01

19 Nov '01

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I've developed a Multimedia extender for OS/2 that allows OS/2's multimedia system to play MP3s. <http://www.math.berkeley.edu/%7Eroconnor/MMIOMP3/> I was using mpglib, but I've switch to libmad. Thanks for the nice decoding library! - -- Russell O'Connor roconnor(a)math.berkeley.edu <http://www.math.berkeley.edu/~roconnor/> ``This is not a time, as it is never a time, to seek vengeance, but a time to seek the courage to forgive'' -- George W. Bush -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (SunOS) Comment: For info see http://www.gnupg.org iD8DBQE7+F0BZG3em5NXM14RAk4rAJ9M4torJ280T4jGfaFaOu7zfhOz9wCfTliU vV6oGNNiI0DT69IxmWLuglM= =li3b -----END PGP SIGNATURE-----

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MAD 0.14.2b available
by Rob Leslie 09 Nov '01

09 Nov '01

MAD version 0.14.2b is now available. See the CHANGES file in the distribution for full details. In summary... This version adds three new output modules to `madplay': - esd: Enlightened Sound Daemon (EsounD) - cdda: CD audio (16-bit 44100 Hz stereo, padded to CD frame boundary, suitable for recording directly to CD) - aiff: Audio IFF Also, two new options: --bit-depth: select the output sample resolution --ignore-crc: decode frames with bad CRCs Finally, for Win32 users, `madplay' no longer requires any Cygwin DLLs at runtime; the built EXE runs stand-alone using Microsoft's Visual C runtime (MSVCRT.DLL). Also, keyboard controls are now supported under Win32. The MAD plug-in for Winamp has one bug fix and a few other changes in preparation for an ID3v2 tag editor, but no major new developments. The source code is here: ftp://ftp.mars.org/pub/mpeg/ The plug-in for Winamp is here: http://www.mars.org/home/rob/proj/mpeg/mad-plugin/ Cheers, -- Rob Leslie rob(a)mars.org

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simple example using libmad
by Wayne Davis 09 Nov '01

09 Nov '01

Hi, I'm trying to use minimad to understand the interface to libmad. First, I was having trouble using it with a command like: cat test.mp3 | minimad This was failing on the test for fstat... So, I modified the code: fd = open ("test.mp3", O_RDONLY); fstat (fd, &stat); fdm = mmap(0, stat.st_size, PROT_READ, MAP_SHARED, fd, 0); if (fdm == MAP_FAILED) return 3; When I run this version of minimad, minimad dumps junk to my screen. Anyone have any ideas about what's going wrong? w

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(no subject)
by Rene Rebe 03 Nov '01

03 Nov '01

Hi. > I was looking through the MAD examples (minimad and madplay) in order for > me to integrate MAD into Apollo. It became apparent pretty quickly > that this is no easy task, with just one of the files for the madplay > example touching 2000 lines of compact, fairly complex code. That combined > with no documentation easily destroyed most of my motivation. > > I wondered if anybody has written a fairly decoupled C++ wrapper class. It > doesn't have to be quite: A C++ wrapper (GPL) can be found in GMSP: www.tfh-berlin.de/~s712059/gsmp/index.html (file GSMP/[src,include]/MADHelper.[hh,cc] ) > MP3File m("my_song.mp3"); > m.play(); OK. With this wrapper it isn't that easy! ;-) - But you have a open/read/seek/ close style interface to read and seek in the MP3 file ... > but at least closer to that than to the 2000+ line example included. Yes closer to that 2000+ lines. Two draw-backs: 1. It is still in development and sometimes outputs a) -1152 samples before the pos you requested b) other unmatching data (fixed in some hours / days) 2. First seeking is a bit slow because: we need sample accurate seek in GSMP -> And so we can not use the pi * thumb "guessing" found in normal player only software. > - Marius Sundbakken > Apollo Developer: http://www.apolloplayer.org k33p h4ck1n6 René -- René Rebe (Registered Linux user: #127875) eMail: rene.rene(a)gmx.net rene.rebe(a)rocklinux.org Homepage: http://www.rene.rebe.myokay.net/ Anyone sending unwanted advertising e-mail to this address will be charged $25 for network traffic and computing time. By extracting my address from this message or its header, you agree to these terms.

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mad-dev November 2001