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Question about madplay, libmad and libid3tag
by Kiran Biswal 28 Sep '09

28 Sep '09

Hi All , I am new user of MAD. I am trying to compile MAD on my platform (MIPS based). When I try to run the ./confogure from commandline it prompts me to point to the libmad and libid3tag which are in separate directories, so I give path to both libmad and libid3tag like below from the directory where madplay-0.15.2b is kept ./configure CPPFLAGS=-I/root/Music/audioplayer/libmad/libmad-0.15.1b CPPFLAGS=-I/root/Music/audioplayer/libid3tag/libid3tag-0.15.1b LDFLAGS=-L/root/Music/audioplayer/libmad/libmad-0.15.1b LDFLAGS=-L/root/Music/audioplayer/libid3tag/libid3tag-0.15.1b But it still complains that it can not find mad.h and I must first install libmad . Could you please tell me how to point to libmad and lib3tag at the same time? Thanks in advance for the help Regards Kiran

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id3tag pkgconfig: -zf
by hollunder＠gmx.at 24 Mar '09

24 Mar '09

Hi there, I'm investigating an error when attempting to build sonic visualiser 1.5 and we narrowed it down to the -zf option in the pkgconfig. Is this a bug in libid3tag or in my distro? This is the error at compiletime: g++ -Wl,-O1 -Wl,-rpath,/usr/lib -o sonic-visualiser tmp_obj/main.o tmp_obj/OSCHandler.o tmp_obj/MainWindow.o tmp_obj/PreferencesDialog.o tmp_obj/moc_MainWindow.o tmp_obj/moc_PreferencesDialog.o tmp_obj/qrc_sonic-visualiser.o -L../view -L../layer -L../data -L../widgets -L../transform -L../plugin -L../base -L../system -L../framework -L../audioio -L../rdf -L/usr/lib -lsvframework -lsvaudioio -lsvview -lsvlayer -lsvrdf -lsvtransform -lsvwidgets -lsvdata -lsvplugin -lsvbase -lsvsystem -lbz2 -L/home/hollunder/builds/vamp-plugin-sdk/pkg/usr/lib -lvamp-hostsdk -loggz -lfishsound -lvorbisenc -lspeex -lvorbis -logg -lmad -zf -lid3tag -lrubberband -lfftw3 -lfftw3f -lsndfile -lsamplerate -llrdf -lrdf -lrasqal -lraptor -lportaudio -ljack -llo -Wl,-Bdynamic -lQtXml -L/usr/lib -pthread -pthread -lQtGui -L/usr/X11R6/lib -pthread -lpng -lfreetype -lgobject-2.0 -lSM -lICE -pthread -pthread -lXrender -lfontconfig -lXext -lX11 -lQtNetwork -lssl -lcrypto -pthread -pthread -lQtCore -lz -lm -pthread -lgthread-2.0 -lrt -lglib-2.0 -lpthread -ldl g++: unrecognized option '-zf' This is the pkgconfig file including the -zf prefix=/usr exec_prefix=/usr/bin libdir=/usr/lib includedir=/usr/include Name: ID3TAG Description: libid3tag - ID3 tag manipulation library Version: 0.15.0b Libs: -L${libdir} -lid3tag -zf Cflags: Thanks in advance for your help

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libmad-0.15.1b does not compile on Fedora 9
by Joao Moreira 13 Oct '08

13 Oct '08

Hi, [Posted this on mad-dev some days ago, got no answer...] I've just installed a clean Fedora 9 distro, and I tried to compile libmad-0.15.1b (which I had done fine previously, under Fedora 5), I got the following error : gcc -DHAVE_CONFIG_H -I. -I. -I. -DFPM_INTEL -DASO_ZEROCHECK -Wall -march=i486 -g -O -fforce-mem -fforce-addr -fthread-jumps -fcse-follow-jumps -fcse-skip-blocks -fexpensive-optimizations -fregmove -fschedule-insns2 -fstrength-reduce -MT version.lo -MD -MP -MF .deps/version.Tpo -c version.c -fPIC -DPIC -o .libs/version.o cc1: error: unrecognized command line option "-fforce-mem" make[2]: *** [version.lo] Error 1 gcc version 4.3.0 does not have the "-fforce-mem" option... what can I do ? is there a way (a configure option) to disable this ? Thx, Joao -- Joao Moreira de Sa Coutinho joao.moreira(a)free.fr Tel.: 08.70.23.48.29 Mob.: 06.28.90.83.67

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libmad newbie questions
by Alan Wolfe 28 Jun '08

28 Jun '08

Heya! I was wondering; since mp3 is a closed format that you need to pay royalties for, how does libmad get around this? Also I was looking at the libmad page and noticed it said this under licensing: "MAD is available under the terms of the GNU General Public License, Version 2 <http://www.underbit.com/resources/license/gpl/>, for either permanent use or for evaluation prior to obtaining a commercial license." Just to be clear, if you use libmad commercially you can either do so with the GPL license (satisfying that license) or you can contact the owners of the library to talk about paying for a non GPL commercial license right? I am looking for a way to convert mp3 to wav in a product that is going to be released commercially and libmad really seems like the perfect fit, I just want to make sure I know what's up with licensing before commiting to this path. Thanks a bunch!

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Stream Decode
by Alexey V Paramonov 21 May '08

21 May '08

Hi! I have the following question - is it possible to decode a stream using MAD? For example: I have shoutcast stream and I read it in small portions (say, 40960 bytes), decode it and encode back to mp3 using LAME (chaning bitrate, samplerate, etc...). The problem is that I have to call mad_stream_buffer with each piece of stream data, decode/encode it and then if I listen the resulting mp3 file - I notice "noise" between theese small decoded pieces. Seems like it happen not only with VBR files. Pseudo-code: while ( bytes = read(file_id, buff, SHOUT_BUFFER_LENGTH ) ) { mad_stream_buffer(&stream, buff, bytes ); while(1){ mad_frame_decode(&frame,&stream) .... int ret = lame_encode_buffer( lameGlobalFlags, left, right, nsamples, mp3Buf, mp3Size ); // Play resulting mp3 data } } Is it possible to decode a stream without theese "edge effects" ? May be I should not re-initialize MAD buffer after each read in some way? Please help.

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decoding error while using minimad.c
by 王斐斐 21 Apr '08

21 Apr '08

Hello ! I just got started using libmad. I need to write an application to decode an mp3 file.I tried to run minimad.c, some errors like that: decoding error 0x0101(lost synchronization)at byte offset 0 decoding error 0x0101(lost synchronization)at byte offset 5539905 my soundcard info: Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 02) Subsystem: Ensoniq Creative Sound Blaster AudioPCI64V, AudioPCI128 Flags: bus master, ?? devsel, latency 64, IRQ 18 I/O ports at 1400 [size=64] my kernal system( running in VMware workstation) info: 2.6.15-1.2054_FC5 i686 athlon i386 something in /etc/modprobe.conf is:alias eth0 pcnet32 alias scsi_hostadapter BusLogic alias snd-card-0 snd-ens1371 options snd-card-0 index=0 options snd-ens1371 index=0 remove snd-ens1371 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-ens1371 Can anyone please help me? Thank you!! feifei.wang ___________________________________________________________ 雅虎邮箱，您的终生邮箱！ http://cn.mail.yahoo.com/

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Minimad.c
by Sebastiaan Heunis 27 Feb '08

27 Feb '08

Hi I just got started using libmad. I need to write an application to decode an mp3 and write the contents to a data file for FM modulation in Gnuradio. I tried to compile minimad.c using g++ -c minimad.c -lmad, but I can't get it to work. I get the following errors. Can anyone please help me? minimad.c: In function ��int main(int, char**)��: minimad.c:56: error: invalid conversion from ��void*�� to ��const unsigned char*�� minimad.c:56: error: initializing argument 1 of ��int decode(const unsigned char*, long unsigned int)�� minimad.c: In function ��mad_flow input(void*, mad_stream*)��: minimad.c:87: error: invalid conversion from ��void*�� to ��buffer*�� minimad.c: In function ��mad_flow error(void*, mad_stream*, mad_frame*)��: minimad.c:175: error: invalid conversion from ��void*�� to ��buffer*�� Thank you Sebastiaan

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(no subject)
by Jens Lippmann 03 Jan '08

03 Jan '08

1 0

madplay: How to select a specific ALSA card
by Thomas Reitmayr 03 Jan '08

03 Jan '08

Hi, I just started using madplay a short while ago and I was wondering whether it is possible to select an ALSA card different from the default one for audio output. >From looking at the code it seems like the PATH part of --output is used, however madplay --output=alsa:plughw:1 myfile.mp3 chokes as the TYPE alsa does not exist (in audio.c). Did I miss something in the command line or is this a bug / missing feature (for which I could provide a patch)? Thanks, -Thomas

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dual-thread libmad
by Steve Spano 09 Dec '07

09 Dec '07

I have made a lot of progress working with libmad and trying to get two instances running. I have a simple RTOS which has two threads. Each thread starts lib mad with a dedicated mad_decoder buffer for each thread. I am now able to "read" data correcting into the decoders (i.e. I don't see decoding errors streaming everywhere on the debug trace) but the output audio is mixed up. Meaning that the audio from the two threads is being mixed (actually shuffled) during playback. Seems like there may be another global buffer being used somewhere that I have to split out onto two threads or something. Can anyone help with ideas on how to have two threads, play two different MP3s, using libmad? Thanks Steve Spano, President Finger Lakes Engineering

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