+--------------------------------------+ | JMPG123 MPEG Audio Libray | | copyright (c) 1998 by Michael Hipp | +--------------------------------------+ It's my first java project and even my first real object oriented program at all, so forgive me if some of the stuff is done ugly. Currently, only support for Layer2,Layer3 audio streams. Layer3 needs some more debugging. MPEG-2 isn't tested. Output is always to the standard out with stereo, 16 bit and BIG endian. If you use the native part to decode: the output endian is system dependend. This will change in the future! Simple performance tests: (solaris/Dual Sun Ultra 2 with 300MHz) mpg123 (raw C) = 100% (precision=float) jmpg123 (sunwjit JIT compiler) = 622% (precision=double) jmpg123 (interpreted) = 3436% (precision=double) Possible Options: (no options: write audio to audio system) -s : write audio to STDOUT -t : only decoding no output -native: use native functions for 'SubBandSynthesis' and 'Dct64' Native Libs: in the directories jmpg/libnative.linux/ and jmpg/libnative.solaris/ you can find the precompiled libs for Linux and Solaris. You must put the appropriate path in your library path environment value. (eg LD_LIBRARY_PATH ) You may wanna build this part yourself. Check jmpg/lib/native/ and jmpg/audio/native/ in this case. You need the libaudionative.so library if you wanna play the samples directly to your hardware. Else you must use the '-s' option and redirect the standard output to a special (system depended) audio player. Running with jmpg.jar: Add the file jmpg.jar to your CLASSPATH environment. Ie: (tcsh/csh): setenv CLASSPATH $CLASSPATH\:/home/myjavauser/java/jmpg.jar (bash) : export CLASSPATH=$CLASSPATH\:/home/myjavauser/java/jmpg.jar Running in a default environment: Uncompress the jar-file and copy the jmpg/ directory into a directory, which is part of your CLASSPATH or add the parent directory of jmpg/ to your CLASSPATH. Running: Then call: java jmpg.jmpg123 -t This will decode the MPEG without playing. For real playing remove the '-t' option or replace it by '-s'. As mentioned above, only '-t' or '-s' is 100% pure java. Else the program tries to load the nativeAudio library to play directly to the audio hardware.
