mad-dev January 2007

mad-dev@lists.mars.org

7 participants
6 discussions

how to play cdr file decoded by madlld
by Gang-Ryung Uh 04 Feb '07

04 Feb '07

We installed madlld and decode sample mp3 file into cdr extension. Could you advise us how to play that cdr file on cygwin with window XP? Thanks, __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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ressources needed
by zelos 414 26 Jan '07

26 Jan '07

Hello, I'm interested in making a mp3 mplayer in c++ with MAD. I was using FMOD which supports much more formats(Ogg, mod, etc) but it is not GPL! Do you know where I can find a doc about MAD API ? I can't even find one!? Thanks a lot. Zelos

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madplay application in uClinux distribution
by Paraskevi D. Kyritsi 19 Jan '07

19 Jan '07

My name is Paraskeyh Kyritsi and I have downloaded madplay-0.15.2b with the libmad-0.15.1b and libid3tag-0.15.1b. I have built all the above in a uClinux distribution kernel version 2.4.x using arm-elf tools. The produced image is being downloaded in a sdram memory and is being played by an arm9 microprocessor with audio output in a Teak DSP core. There seems to be no problem with the debug of the code but...I can't hear the mp3 file being played. I have some debug messages like the below ones: ################################################################### # madplay /storage/moby-flowe210907_8k16b.mp3 DSP ioctl: DSP_PREPARE 20 20 DSP codec internal MPEG Audio Decoder 0.15.2 (beta) - Copyright (C) 2000-2004 Robert Leslie et al. We are in the player_run function argc=1 argv[0]=/storage/moby-flowe210907_8k16b.mp3 Initialize audio run the player Run PlayList!!!! is result 0? yes!!! here we are in ---->result = play_all(player) playlist_entry=/storage/moby-flowe210907_8k16b.mp3 Fail reading ID3 tag information result=-1 frames decoded1 3780247555 finish up ######################################################### Well, it's rather difficult situation. I hope there is someone who can test something similar to help me. Regards, Paraskeyh Kyritsi

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Re: mad-dev Digest, Vol 18, Issue 3
by Sayak 17 Jan '07

17 Jan '07

Hi Khalid, If I have understood your problem correctly, you want to extract ID3 tag and if possible Lyrics Tag in MP3 file. For version2(v2), it is stored after the encoded data, to extract it, you have to go at the end of the file. I have done this in my own way. What I did was like this, 1. fseek(pFile, filesize - 10000, SEEK_SET); This 10000 number was arbitrary. To accomodate Lyrics space. But if it is only ID3 tag present in the file, you can reduce this number to a mere 100. 2. fread(pBuffer, 1, 1000, pFile);//Lyrics Tag is also present Otherwise go 10 byte at a time. ststr(pBuffer,"ID3"). If strstr does not work in your compile(possible), go by the stupid process of matching byte by byte. When you found the ID3 tag, extract the information as per the specification of ID3 tag. You have to do this even before start decoding MP3 file. In case of encoding write the information, write the information after encoding is done. <ID3> <FILE> <Artist> </Artist> </FILE> </ID3> In Case of version 1(v1) however ID3 tag is at the beginning of the file. Then you dont have to go at the end of the file. Kind Regards, Sayak ----- Original Message ----- From: <mad-dev-request(a)lists.mars.org> To: <mad-dev(a)lists.mars.org> Sent: Wednesday, January 17, 2007 1:30 AM Subject: mad-dev Digest, Vol 18, Issue 3 > Send mad-dev mailing list submissions to > mad-dev(a)lists.mars.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.mars.org/bin/mailman/listinfo/mad-dev > or, via email, send a message with subject or body 'help' to > mad-dev-request(a)lists.mars.org > > You can reach the person managing the list at > mad-dev-owner(a)lists.mars.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of mad-dev digest..." > > > Today's Topics: > > 1. MP3 tag (Khalid Aallouche) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 16 Jan 2007 07:41:19 +0200 > From: Khalid Aallouche <khalid.aallouche(a)tut.fi> > Subject: [mad-dev] MP3 tag > To: mad-dev(a)lists.mars.org > Message-ID: <20070116074119.76hpnvh4pw0cck4o(a)webmail.tut.fi> > Content-Type: text/plain; charset=ISO-8859-15; DelSp="Yes"; > format="flowed" > > Hi all, > > I send you that email because I want to extract the Genre (rock, > salsa...) from the MP3 > file. I have studied libid3tag source code and I don't know how to > perform that. I will > be very grateful if someone can help me. > > In a second step, I want to write tags in an MP3 file (tagg v2).If > someone can tell if > it's possible to do that with libid3tag. > > Thank you for your comprehension > b.r, > Khalid > > > > End of mad-dev Digest, Vol 18, Issue 3 > ************************************** > >

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MP3 tag
by Khalid Aallouche 16 Jan '07

16 Jan '07

Hi all, I send you that email because I want to extract the Genre (rock, salsa...) from the MP3 file. I have studied libid3tag source code and I don't know how to perform that. I will be very grateful if someone can help me. In a second step, I want to write tags in an MP3 file (tagg v2).If someone can tell if it's possible to do that with libid3tag. Thank you for your comprehension b.r, Khalid

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hello : i have problem with MAD decoder that it is giving me errors:
by Shikha Patoria 09 Jan '07

09 Jan '07

hello, i am using mad decoder to decode my MPEG3 file . but every time it is giving me errrors File pointer is at 4671920 decoding error 0x0101 (lost synchronization) decoding error 0x0103 (forbidden bitrate value) decoding error 0x0103 (forbidden bitrate value) decoding error 0x0103 (forbidden bitrate value) decoding error 0x0103 (forbidden bitrate value) decoding error 0x0104 (reserved sample frequency value) decoding error 0x0103 (forbidden bitrate value) decoding error 0x0104 (reserved sample frequency value) decoding error 0x0103 (forbidden bitrate value) decoding error 0x0101 (lost synchronization) decoding error 0x0104 (reserved sample frequency value). presently i am using a buffer of size (8000) ,but when it decodes the1st frame,it gives me error of lost synchronization. it is not able to find that sync bit ................................................................................................................ can any one help me in this problem. shikha ______________________________________________________________________

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mad-dev January 2007