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From: Joern Reder <[email protected]>
Newsgroups: comp.lang.perl.announce,comp.lang.perl.modules
Subject: ANNOUNCE: MPEG::MP3Play 0.09
Date: 26 Sep 1999 19:37:13 GMT
Organization: Internet Arena
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I just uploaded MPEG::MP3Play 0.09 to CPAN.

Its final destination is:

http://www.perl.com/CPAN/modules/by-authors/id/J/JR/JRED/MPEG-MP3Play-0.09.tar.gz

Version 0.09 is a minor bugfix release. Mainly a few 'perl -w' warning
messages are fixed. See the CHANGES section of the attached README for
details. There are no changes to the interface.

NAME
   MPEG::MP3Play - Perl extension for playing back MPEG music

SYNOPSIS
     use MPEG::MP3Play;
     my $mp3 = new MPEG::MP3Play;

     $mp3->open ("test.mp3");
     $mp3->play;
     $mp3->message_handler;

DESCRIPTION
   This Perl module enables you to playback MPEG music.

   This README and the documention cover version 0.09 of the
   MPEG::MP3Play module.

PREREQUISITES
   Xaudio SDK

   MPEG::MP3Play is build against the 3.0 version of the Xaudio SDK
   and uses the async interface of the Xaudio library.

   I don't know if older versions will work properly. The SDK is
   not part of this distribution, so get and install it first
   (http://www.xaudio.com/).

   Perl

   I built and tested this module using Perl 5.005_03. It should
   work also with Perl 5.004_04 and above, but I did not test this.
   If someone builds MPEG::MP3Play successfully with other versions
   of Perl, plesase drop me a note.

   Optionally used Perl modules

     samples/play.pl uses Term::ReadKey if it's installed.
     samples/handler.pl requires Term::ReadKey.
     samples/gtk*.pl require Gtk.

DOWNLOADING
   You can download MPEG::MP3Play from any CPAN mirror. You will
   find it in the following directories:

     http://www.perl.com/CPAN/modules/by-module/MPEG/
     http://www.perl.com/CPAN/modules/by-authors/id/J/JR/JRED/

   You'll also find recent information and download links on my
   homepage:

     http://www.netcologne.de/~nc-joernre/

INSTALLATION
   First, generate the Makefile:

     perl Makefile.PL

   You will be prompted for the location of the Xaudio SDK. The
   directory must contain the include and lib subdirectories, where
   the Xaudio header and library files are installed.

     make
     make test
     ./runsample play.pl
     ./runsample handler.pl
     ./runsample gtk.pl
     ./runsample gtkhandler.pl
     ./runsample gtkinherit.pl
     ./runsample synopsis.pl
     make install

SAMPLE SCRIPTS
   There are some small test scripts in the samples directory. You
   can run these scripts before 'make install' with the runsample
   script (or directly with 'perl', after running 'make install').
   For runsample usage: see above.

   All scripts expect a mp3 file 'test.mp3' in the actual
   directory.

   play.pl Textmodus playback. Displays the timecode. Simple volume
           control with '+' and '-' keys.

   handler.pl
           Does generally the same as play.pl, but uses the builtin
           message handler. You'll see, that this solution is much
           more elegant. It *requires* Term::ReadKey.

           This script makes use of the debugging facility and is
           best documented so far.

   gtk.pl  This script demonstrates the usage of MPEG::MP3Play with the
           Gtk module. It produces a simple window with a progress
           bar while playing back the test.mp3 file.

   gtkhandler.pl
           This script does the same as gtk.pl but uses the builtin
           message handler concept instead of implementing message
           handling by itself. Advantage of using the builtin
           message handler: no global variables are necessary
           anymore.

           Because 'runsample' uses '`perl -w'' you'll get a
           warning message here complaining about a subroutine
           redefinition. See the section USING THE BUILTIN MESSAGE
           HANDLER for a discussion about this.

   gtkinherit.pl
           This is 'gtkhandler.pl' but throwing no warnings,
           because it uses subclassing for implementing messages
           handlers.

   synopsis.pl
           This one proves that the usage shown in the SYNOPSIS
           *really* works ;)

BASIC CONCEPT
   The concept of the Xaudio async API is based on forking an extra
   process (or thread) for the MPEG decoding and playing. The
   parent process controls this process by sending and recieving
   messages. This message passing is asynchronous.

   This module interface provides methods for sending common
   messages to the MPEG process, eg. play, pause, stop. Also it
   implements a message handler to process the messages sent back.
   Eg. every message sent to the subprocess will be acknowledged by
   sending back an XA_MSG_NOTIFY_ACK message (or XA_MSG_NOTIFY_NACK
   on error). Error handling must be set up by handling this
   messages.

   You will find detailed information about the interface of
   this module in its POD documentation.

TODO
     - Win32 support
     - support of the full Xaudio API, with input/output
       modules, etc.
     - documentation: more details about the messages
       hashes

   Ideas, code and any help are very appreciated.

BUGS
   Currently there are no known bugs.

PROBLEMS AND REPORTING BUGS
   First check if you're using the most recent version of this
   module, maybe the bug you're about to report is already fixed.
   Also please read the documentation entirely.

   If you find a bug please send me a report. I will fix this as
   soon as possible. You'll make my life easier if you provide the
   following information along with your bugreport:

     - your OS and Perl version (please send me the output
       of 'perl -V')
     - exact version number of the Xaudio development kit
       you're using (including libc version, if this is relevant
       for your OS, e.g. Linux)
     - for bug reports regarding the GTK+ functionality
       I need the version number of your GTK+ library and
       the version number of your Perl Gtk module.

   If you have a solution to fix the bug you're welcome to send me
   a unified context diff of your changes, so I can apply them to
   the trunk. You'll get a credit in the Changes file.

   If you have problems with your soundsystem (you hear nothing, or
   the sound is chopped up) please try to compile the sample
   programs that are part of the Xaudio development kit. Do they
   work properly? If not, this is most likely a problem of your
   sound configuration and not a MPEG::MP3Play issue. Please check
   the Xaudio documentation in this case, before contacting me.
   Thanks.

MPEG::MP3Play APPLICATIONS
   I'm very interested to know, if someone write applications based
   on MPEG::MP3Play. So don't hesitate to send me an email, if you
   like (or not like ;) this module.

TESTED ENVIRONMENTS
   This section will list the environments where this module is
   known to function well:

     - Perl 5.005_03 and Perl 5.004_04, Linux 2.0.33 and
       Linux 2.2.10, Xaudio SDK 3.01 glibc6,
       gtk+ 1.2.3, Perl Gtk 0.5121

     - FreeBSD 3.2 and 3.3. See README.FreeBSD for details
       about building MPEG::MP3Play for this platform.

AUTHOR
   Joern Reder <[email protected]>

COPYRIGHT
   Copyright (C) 1999 by Joern Reder, All Rights Reserved.

   This library is free software; you can redistribute it and/or
   modify it under the same terms as Perl itself.

   The Xaudio SDK is copyright by MpegTV,LLC. Please refer to the
   LICENSE text published on http://www.xaudio.com/.

SEE ALSO
   perl(1), MPEG::MP3Info.

CHANGES
   Revision history for Perl extension MPEG::MP3Play.

   0.09  Fri Sep 26 1999, joern
       - The error messages thrown on exit of the Gtk+ sample
         scripts are gone. Thanks to Dermot Musgrove for his
         suggestions. I added a small chapter about preventing
         these error messages in the documentation.
       - 'runsample' now uses 'perl -w'. MPEG::MP3Play and
         all sample scripts should now work without throwing
         warning messages (except 'gtkhandler.pl' where this
         is intended).
       - There is a new sample script 'gtkinherit.pl' to demonstrate
         implementing message handlers by subclassing MPEG::MP3Play
       - README.FreeBSD added, thanks go to Bryan Collins
         <[email protected]> for his detailed information
       - 'runsample' is now generated by Makefile.PL to ensure that
         the correct Perl interpreter is used

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