mad-dev

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682 discussions

Decode time is longer than song time on ARM EP7312?
by Jimmy Lin 13 May '02

13 May '02

Hi all, I have compiled madplay-0.14.2 for ARM with the special following option: --host=arm-linux --enable-speed --disable-debugging --enable-fpm-arm Because, I don't have sound output device on my target right now , so I tried to run madplay with only DECODE on iPaq (StrongARM 210MHz) and EP7312 (ARM 74MHz) for compare. The test.mp3 is 128kbps, 44100Hz, joint stereo, 1m1.2s long. $ time ./madplay -v --output=wave:/dev/null test.mp3 iPaq: 11.857s EB7312: 1m5.539s What I got wrong? Does it mean my platform can't play mp3 smoothly? Any idea to improve the performance in that case? Thank you for your suggestion! Regards, Jimmy

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Cross compiling again
by Gareth Bransby 06 May '02

06 May '02

Hi, I maganged to get mad cross compiled with with an arm-linux cross compiler but it turs out that is not the wan I should be using. I have jsut built an arm-elf cross compiler and it works fin on simple programs. Now when i do ./configure I get the error : configure: error: can not run test program while cross compiling I understand why it can't run the test program but it never had a problem with the other cross-compiler. I tried giving it the --build=1686-linux along with the --host=arm-elf option so it would _know_ it was cross compiling but this made no difference. Is htere some other optin that i can pass to configure to stop it running test programs?

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Error 0x0101 ... using libmad...
by naso 03 May '02

03 May '02

Hi everybody, I'm Simone from Genoa. I'm using minimad for WinCE, so I had to modify it in some part. Now I believe I've done a good job, because the function "decode" does something... it calls "input" then calls "error". The message I get from "error" is the sequent: "decoding error 0x0101 at byte offset 0" Does someone know what does it means (I've understood only that the error happens at the beginning of the file ".mp3", but the code 0x0101 doesn't tell me nothing...)? Thank you all. ---- Simone

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Equaliser style effect.. i.e visualisation.
by Thomas Rathbone 02 May '02

02 May '02

In what stage of the decoding process can i find the information I would need to create an equaliser (a frequencies bar graph) visualisation? Do I just look at the subband levels or is that totally wrong? Has anybody done this? Much thanks. Tom.

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id3 genre list
by Neil Hodge 01 May '02

01 May '02

All: How can I go about simply scrolling through the list of genres? I can't quite seem to get what I want. Thanks. -- Neil Hodge nhodge(a)attbi.com

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Using minimad.c...
by naso 29 Apr '02

29 Apr '02

Hi everybody, I've some problem because minimad read on the standard input the mp3 file and send the decoded PCM samples to the standard output, but I'm using WinCE, so I have to use an input file and an output file different from the standards. For the input I've done so: int main() { struct stat stat; FILE *test; int file_des; test = _wfopen(TEXT("\\a.mp3"), TEXT("r")); file_des = _fileno(test); fstat(file_des, &stat); /* 1. map input stream into memory */ decode(test, stat.st_size); } and I hope it goes well, but I tried to modify the output function discovering that it apparently never executes!!! I would like to send the PCM samples to a wave file (I already know how to write the chunks...) and play this .wav, but I don't understand how to catch this damned samples, help me, please!!! --- Simone

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How to play mp3 using libmad?
by naso 28 Apr '02

28 Apr '02

Hi everybody, I'm Simone from Genoa (Italy). >From some time I'm using the library mad.h (I compiled the WinCe version); to understand how to use mad.h I downloaded the program "minimad.c" and got the decoding from mp3 to PCM samples. Now I would like to hear this samples using WinCE, but I don't know how... Can You help me? I thank you all for your attention. -- Simone Naso

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Re: mad-dev digest, Vol 1 #149 - 4 msgs
by armin.gerritsen＠philips.com 26 Apr '02

26 Apr '02

>Doesn't make the DShow filter involve linking libmad with core MS libraries? >Isn't this illegal under the terms of the GPL? Why should it? I never saw anything in the GPL licence what would disallow that. BTW using any non-GPL compiler will have non-GPL libs linked in it. This regardless whether it is DShow or anything else. GPL doesn't say anything about that. If it did, you couldn't use GPL with *any* non-GPL compiler. And we all know that is no issue. :-) Armin

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Vorbis article
by Rob Leslie 26 Apr '02

26 Apr '02

I promised I would send a link for my article on Vorbis once it was posted. The article made the front page of K5. Here it is: http://www.kuro5hin.org/story/2002/4/25/212840/001 Cheers, -rob

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DirectShow filter based on MAD
by armin.gerritsen＠philips.com 25 Apr '02

25 Apr '02

Hello All, I just wanted to let you know I'm working a DirectShow filter implementation for MAD. Basically this is just a wrapper around the MAD library to create a DirectShow Transform Filter. (For those who know the DirectShow names it is clear now. :-) ). The core is finished now and I added a sample property page which displays copyright (and it makes it easier for future updates, since they would only have to focus on the properties and not the framework.) More simple said: the first stable working version is finished and available. I'd like to 'donate' it as should to the GPL world. What would you think is the best way? I though about contacting Rob, but doesn't respond. Probably just because he is very busy. Best regards, Armin -- Philips Semiconductors B.V. Systems Laboratory Eindhoven (PS-SLE) Building BE235, Hurksestraat 19, P.O.Box 218, 5600MD Eindhoven, The Netherlands E-mail: Armin.Gerritsen(a)philips.com

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