mad-dev September 2004

mad-dev@lists.mars.org

13 participants
17 discussions

autoconf
by David 01 Oct '04

01 Oct '04

I've been working for the last several days on adding lirc support directally into 'madplay' and am almost done, but I have a few questions that would make the finishing touches a lot easier. Question: I don't know anything about autoconf or automake or what a m4 macro is. I have manually edited the Makefile to support my builds, but i'm trying for correct implementation. The lirc web site says that only the following lines would be neded to add to the configuration process (files) to check for support. here is the site for refereence. http://www.lirc.org/html/technical.html#library dnl Check for LIRC client support dnl This really is not worth making a separate file for it. have_lirc=yes AC_REQUIRE_CPP AC_CHECK_LIB(lirc_client,lirc_init, AC_CHECK_HEADER(lirc/lirc_client.h,true,have_lirc=no),have_lirc=no) if test "$have_lirc" = "yes"; then dnl AC_DEFINE(HAVE_LIRC); true; else AC_MSG_ERROR([*** LIRC client support not available ***]); fi Can someone plese tell me where and in which file to add these lines? Or just forward to me directally a copy of the files in a fixed state. I'm not sure that this is all that is actually needed I did have to add this line to the Makefile to correctly link the program LDFLAGS += /usr/lib/liblirc_client.so Hope this helps, and sorry I really don't understand automake and conf.

2 2

License issues
by Emil Rojas 01 Oct '04

01 Oct '04

I'm curious about the GPL license issues. Does linking the unchanged library in an application cause all of ones application code to be subject to the GPL? If this is not the appropriate forum for this question, I would appreciate being directed to an appropriate location. thanks, emil

4 3

i/o redirect problem w/minimad
by Emil Rojas 28 Sep '04

28 Sep '04

If I run minimad like: minimad < x.mp2 > x.pcm it works fine, but if I run it like cat x.mp2 | minimad > x.pcm The state returns a zero size the minimad exits. Does anyone have any idea why this might happen? thanks, emil

2 2

cross compile issue resolved
by Emil Rojas 28 Sep '04

28 Sep '04

I just want to report that the cross compile issue I had with minimad appears to be resolved. Part of the problem was that my MPEG source was mono, and I was trying to play it as stereo. So the sound output depended a lot on the input, i.e. something that started as a chirp got more messed with then did a song, and both play at 2X. I don't know if this was the only problem, but I remade from a clean installation and changed my copy of minimad to output stereo and I got the desired result. I probably will not resolve the issue with zlib and the configuration with for cross platform installation of mad play. emil

1 0

audio-jaguar
by pmisteli 25 Sep '04

25 Sep '04

Why is audio-jaguar in madplay not finished ? Has anyone finished it ?

2 1

(no subject)
by pmisteli 25 Sep '04

25 Sep '04

Why is audio-jaguar in madplay not finished ? Has anyone finished it ?

1 0

Re: [mad-dev] Cross complilation/running minimad
by Emil Rojas 24 Sep '04

24 Sep '04

Ok, I was able to execute the actual code, but I the output is not correct. Here is what I did cat ~/data/audio/bfire-w2m.mp2 ./minimad > x.pcm I then encapsulate the PCM as a wave file with a program I wrote, and produced the file x-mni.wav and I also did on the development linux machine. ./madplay --output=wave:x.-mp86.wav ~/data/audio/bfire-w2m.mp2 You can see that file size is different here: -rw-r--r-- 1 erojas users 37528 Sep 24 13:33 x-mini.wav -rw-r--r-- 1 erojas users 16172 Sep 24 13:36 x-mp86.wav When I play these files on a PC using winamp the madplay produced file is correct, and the minimad produced file is white noisy. Any ideas? Endianess? Number of bits per sample? It does output PCM? -------------------- Re: building madplay for the target, I'm having a devil of a time. Because I need to first install both the MAD library and tags library. But I can get the tags library to figure because it needs zlib. I have tried installing zlib, and I believe this has been done correctly, but the configure for the tags lib can not find it. I think this is because it is not telling the compiler to look in the right place, but I'm not really sure. Re: script problem: The problem my be that I am installing the code in a directory that is later mounted as the root of the STB that I am developing for. I tried removing that part of the path in the one place it appeared and then executing it on the target but I still had the same error. thanks, emil At 02:30 PM 9/23/2004, Rob Leslie wrote: >On Sep 23, 2004, at 2:22 PM, Emil Rojas wrote: >> Hmm, I still get this stuff when I try to run minimad, do have any idea >> what would cause that? I will make madplay and try it also. > >I think it is probably because the minimad "executable" that is built is >really only a shell script that invokes the real executable after first >arranging to locate the correct shared libraries in the build environment >(as they may not be installed yet). > >The real executable lives in the .libs subdirectory. > >-- >Rob Leslie >rob(a)mars.org >

2 1

MMAP in minimad
by Emil Rojas 23 Sep '04

23 Sep '04

I have compiled by madplay and minimad. Madpaly appears to work corrrectly, but minimad fails at the mmap() call. And clues? emil

2 1

Cross complilation
by Emil Rojas 23 Sep '04

23 Sep '04

The MAD code drop does not appear to be set up for cross compilation. I have tried to modify the makefile and libtool script to used tools with CROSS_COMPILE prepended. The code, madlib and minimad compile but when I try to run minimad I get the output below and I have no idea what it means. I have been able to compile and run madpaly for my development platform, an X86 linux PC. Any help greatly appreciated. If you can CC me in any reply I would appreciate that also. ------------------ minimad sed_quote_subst=s/$[\\`\\"$\\\\]$/\\\1/g: not found relink_command=(cd /home/erojas/src/shell/madplay/madlib-xilleon; { test -z "${LIBRARY_PATH+set}" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z "${COMPILER_PATH+set}" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z "${GCC_EXEC_PREFIX+set}" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z "${LD_RUN_PATH+set}" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; PATH=".:/home/erojas/bin:/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/tools/bin:/sbin:/usr/sbin:/home/erojas/bin"; export PATH; /usr/tools/bin/mipsel-linux-gcc -o $progdir/$file minimad.o ./.libs/libmad.so -Wl,--rpath -Wl,/home/erojas/src/shell/madplay/madlib-xilleon/.libs -Wl,--rpath -Wl,/usr/local/lib): not found 192: SIGSEGV sed_quote_subst=s/$[\\`\\"$\\\\]$/\\\1/g: not found relink_command=(cd /home/erojas/src/shell/madplay/madlib-xilleon; { test -z "${LIBRARY_PATH+set}" || unset LIBRARY_PATH || { LIBRARY_PATH=; export LIBRARY_PATH; }; }; { test -z "${COMPILER_PATH+set}" || unset COMPILER_PATH || { COMPILER_PATH=; export COMPILER_PATH; }; }; { test -z "${GCC_EXEC_PREFIX+set}" || unset GCC_EXEC_PREFIX || { GCC_EXEC_PREFIX=; export GCC_EXEC_PREFIX; }; }; { test -z "${LD_RUN_PATH+set}" || unset LD_RUN_PATH || { LD_RUN_PATH=; export LD_RUN_PATH; }; }; PATH=".:/home/erojas/bin:/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/tools/bin:/sbin:/usr/sbin:/home/erojas/bin"; export PATH; /usr/tools/bin/mipsel-linux-gcc -o $progdir/$file minimad.o ./.libs/libmad.so -Wl,--rpath -Wl,/home/erojas/src/shell/madplay/madlib-xilleon/.libs -Wl,--rpath -Wl,/usr/local/lib): not found 215: SIGSEGV relink_command_output=: not found _command_output [erojas@ati-stw madlib-xilleon]$ minimad sed_quote_subst=s/$[\\`\\"$\\\\]$/\\\1/g: not found relink_command=: not found 229: SIGSEGV sed_quote_subst=s/$[\\`\\"$\\\\]$/\\\1/g: not found relink_command=: not found 252: SIGSEGV relink_command_output=: not found _command_output

2 1

question about standart
by Grigory A. 22 Sep '04

22 Sep '04

Hello! Could someone give me answer : are mp3 frames independent? I mean how current frame depend from previous? It looks like points of dependences are in - overlap procedure - synthesis procedure so if I skip correctly one or more frames - all "problems" will disappear after first newly decoded frame. I mean - first frame decoded after skipped - will be wrong (if compare with non-skipped sequence)and second become same in both cases? Thanks for answers. -- Best regards, Grigory mailto:Ryhor@tut.by

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mad-dev September 2004