MP3 Multimedia IOProc for OS/2 - 0.4.3

MMIOMP3 0.4.3 is an MMIOProc for OS/2 that allows OS/2’s multimedia system to play MP3 files.

This IOProc supports translated read and traslated seek.

MP3 decoding is done by madlib 0.15.0b.

Included is a example program called bitrate that prints the bitrate of an MP3 file.

Download

MMIOMP3 is part of the MMAudio Pak When installing MMAudio Pak you can select which IOProcs to install.

Requirements

MMIOMP3 requires the EMX runtime.

Bugs and Known Issues

MMIOMP3 can not play MP3s that have RIFF WAVE headers. These files are broken anyways. MPEG Audio Utility will remove this kind of junk from mp3 files with the /s0 option.

MMIOMP3 now estimates the playtime of files; the results may not be exact.

If a VBR MP3 files does not have a correct Xing header (and many do not) the estimated playtime of the file will probably differ greatly from the actual playtime.

There are no plans for adding translated write to the IOProc.

To Do

Dither output, or wait for madlib to support dithering of output.
Read IDv2, and Lame Headers.
Add an option to scan the entire file to return hightly accurate playtime and bitrate data.

Changes

Changes from 0.4.2 to 0.4.3 (2003-08-30)
- Reads Xing headers.
- No longer scans entire file to determine play time. I use Xing header data or estimate.
Changes from 0.4.1 to 0.4.2 (2003-02-23)
- Replaced how bitrate queries are made.
- Prepared support for reading file extended attributes.
- Carefully skips IDv2 headers when identifying an MP3 file.
Changes from 0.4 to 0.4.1 (2002-08-28)
- Fixed some minor bugs such as context-menu convert.
- Added uninstaller.
Changes from 0.3.1 to 0.4 (2002-05-27)
- Correct time for variable bit rate files that are not remote.
- Seeking improved for files that are not remote.
- Broke context menu convert. That convert routine never worked all that well.
Changes from 0.3 to 0.3.1 (2002-01-10)
- Install now automatically associates MP3 extension with Digital Audio.
Changes from 0.2 to 0.3 (2001-12-12)
- Now MP3 waveforms are visible in Audio Editor.
- MMIOM_IDENTIFYFILE does not claim that all data is valid mp3.
Changes from 0.1 to 0.2 (2001-11-18)
- Switched from using mpglib to using libmad.
- Made MP3 file identification somewhat better.

Legal Stuff

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Confused?

This would be all public domain if I could have it my way.

Russell O’Connor: roconnor@math.berkeley.edu

Secrets

Go into Multimedia Setup. Look at the Digital Audio tab, and use the + in the corner to find the Association page. Add MP2 as an new extenstion to play MP2 files. May work for MP1s as well.