mad-dev October 2005

mad-dev@lists.mars.org

12 participants
20 discussions

Re: Re: mad-dev Digest, Vol 5, Issue 13
by freeoicq＠huawei.com 31 Oct '05

31 Oct '05

Aron Sogor，您好！ 1.Of course yuo need to use some lib to access Audio A/O. 2.You can make a API from Madlld, like MadCreate(),MadDecode(),MadDelete() 3.It do need to use MadFixedToSshort, convert Output form Int to Short. 　　 ======== 2005-10-29 09:34:00 您在来信中写道： ======== Hmmm... Interesting, a couple of things that I wonder about that idea: 1. madlld does not access the sound device- as writing to the sound device would be either piped to sox or use something like libao. 2. looking at the source it seems madlld "pulls" the frames and controlls the loop vs in madplay mb calling the decoder it uses callback where libmad sort of "push" the frames. ?? is that a valid observetion ?? 3. finally there is the MadFixedToSshort function that turns the decoded mad frame to PCM that seems to be the "magic" each app mention that could be done better... What is it's significance and why do mortals care? Thanks for replying my mail... Aron On 10/28/05, freeoicq(a)huawei.com <freeoicq(a)huawei.com> wrote: mad-dev-request,您好！ You can use madlld to do that. ======= 2005-10-28 12:00:00 您在来信中写道：======= >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. How to embed madplay? (Aron Sogor) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Thu, 27 Oct 2005 21:19:53 -0700 >From: Aron Sogor <bigman(a)gmail.com> >Subject: [mad-dev] How to embed madplay? >To: mad-dev(a)lists.mars.org >Message-ID: > <40a68dcb0510272119n2348e246i4f74207ab2356ee6(a)mail.gmail.com> >Content-Type: text/plain; charset=ISO-8859-1 > >Hi, > >Sorry if I am asking the obvious. > >Is there a way to compile madplay into a shared library? > >I am looking for a way to embed madplay in an application and provide >new controlls other than tty. > >The other option would be to do an exec() and controll it over >stdin/stdout but that is not very elegant. > >Any suggestions? > >Aron > > > >End of mad-dev Digest, Vol 5, Issue 13 >************************************** = = = = = = = = = = = = = = = = = = = = 致礼！ freeoicq 　　　　　　　　 freeoicq(a)huawei.com 2005-10-29 = = = = = = = = = = = = = = = = = = = = = = 　　　　　　　　致礼！　　　　　　　　　　　　　　freeoicq(a)huawei.com 　　　　　　　　　　　　　　freeoicq(a)huawei.com 　　　　　　　　　　　　　　　　　2005-10-31

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Writing to /dev/dsp
by Håvard Sperle Engebretsen 30 Oct '05

30 Oct '05

Hi! I am trying to decode a mp3 file using libmad's minimad in cygwin. Does anyone know if it is possible to write the decoded file to dev/dsp to get a real-time decoding? e.g.: ./minimad <test.mp3> /dev/dsp I have tried the command above, but all I get from my speakers is static. Do I have to set the sample size (16 bits), the number of channels (2) etc.? If so, how can I do this? Your answers will be appreciated, Haavard --

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Fwd: mad-dev Digest, Vol 5, Issue 13
by Aron Sogor 29 Oct '05

29 Oct '05

---------- Forwarded message ---------- From: Aron Sogor <bigman(a)gmail.com> Date: Oct 29, 2005 9:34 AM Subject: Re: mad-dev Digest, Vol 5, Issue 13 To: "freeoicq(a)huawei.com" <freeoicq(a)huawei.com> Hmmm... Interesting, a couple of things that I wonder about that idea: 1. madlld does not access the sound device- as writing to the sound device would be either piped to sox or use something like libao. 2. looking at the source it seems madlld "pulls" the frames and controlls the loop vs in madplay mb calling the decoder it uses callback where libmad sort of "push" the frames. ?? is that a valid observetion ?? 3. finally there is the MadFixedToSshort function that turns the decoded mad frame to PCM that seems to be the "magic" each app mention that could be done better... What is it's significance and why do mortals care? Thanks for replying my mail... Aron On 10/28/05, freeoicq(a)huawei.com <freeoicq(a)huawei.com> wrote: > > mad-dev-request,您好！ > You can use madlld to do that. > > > ======= 2005-10-28 12:00:00 您在来信中写道：======= > > >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. How to embed madplay? (Aron Sogor) > > > > > >---------------------------------------------------------------------- > > > >Message: 1 > >Date: Thu, 27 Oct 2005 21:19:53 -0700 > >From: Aron Sogor <bigman(a)gmail.com> > >Subject: [mad-dev] How to embed madplay? > >To: mad-dev(a)lists.mars.org > >Message-ID: > > <40a68dcb0510272119n2348e246i4f74207ab2356ee6(a)mail.gmail.com> > >Content-Type: text/plain; charset=ISO-8859-1 > > > >Hi, > > > >Sorry if I am asking the obvious. > > > >Is there a way to compile madplay into a shared library? > > > >I am looking for a way to embed madplay in an application and provide > >new controlls other than tty. > > > >The other option would be to do an exec() and controll it over > >stdin/stdout but that is not very elegant. > > > >Any suggestions? > > > >Aron > > > > > > > >End of mad-dev Digest, Vol 5, Issue 13 > >************************************** > > = = = = = = = = = = = = = = = = = = = = > > > 致 > 礼！ > > > freeoicq > freeoicq(a)huawei.com > 2005-10-29 > > > >

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Re: mad-dev Digest, Vol 5, Issue 13
by freeoicq＠huawei.com 29 Oct '05

29 Oct '05

mad-dev-request,您好！ You can use madlld to do that. ======= 2005-10-28 12:00:00 您在来信中写道：======= >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. How to embed madplay? (Aron Sogor) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Thu, 27 Oct 2005 21:19:53 -0700 >From: Aron Sogor <bigman(a)gmail.com> >Subject: [mad-dev] How to embed madplay? >To: mad-dev(a)lists.mars.org >Message-ID: > <40a68dcb0510272119n2348e246i4f74207ab2356ee6(a)mail.gmail.com> >Content-Type: text/plain; charset=ISO-8859-1 > >Hi, > >Sorry if I am asking the obvious. > >Is there a way to compile madplay into a shared library? > >I am looking for a way to embed madplay in an application and provide >new controlls other than tty. > >The other option would be to do an exec() and controll it over >stdin/stdout but that is not very elegant. > >Any suggestions? > >Aron > > > >End of mad-dev Digest, Vol 5, Issue 13 >************************************** = = = = = = = = = = = = = = = = = = = = 　　　　　　　　致礼！　　　　　　　　freeoicq 　　　　　　　　freeoicq(a)huawei.com 　　　　　　　　　　2005-10-29

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How to embed madplay?
by Aron Sogor 28 Oct '05

28 Oct '05

Hi, Sorry if I am asking the obvious. Is there a way to compile madplay into a shared library? I am looking for a way to embed madplay in an application and provide new controlls other than tty. The other option would be to do an exec() and controll it over stdin/stdout but that is not very elegant. Any suggestions? Aron

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ASO_IMDCT and MAD_F_MLA
by Håvard Sperle Engebretsen 23 Oct '05

23 Oct '05

Hi! Two quick question: What is ASO_IMDCT and where is it defined? Where is MAD_F_MLA defined? Regards, Haavard --

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Commercial Use
by Matt Weber 18 Oct '05

18 Oct '05

Hello, Thanks for your past responses everyone. Its helped a lot. So I was wondering if anyone has purchased the mad library for commerical use? If so I wouldnt mind speaking with you about the costs and how you used the library for whatever products. I've been waiting on a draft of licensing fees for a few weeks(7 or so), but I guess either they are on vacation, or I asked too many questions, because I haven't been able to get a response from anyone at Underbit. If you can't speak dollars and cents about your companies implementation, I understand as its probably confidential, but any response would be appreciated. Thanks again. -Matt

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How to compile minimad with coverage in Cygwin?
by Håvard Engebretsen 15 Oct '05

15 Oct '05

Hi! I am trying to use the gcov function to generate a coverage text file of the minimad mp3 decoder. The problem is, Im running Cygwin and the only way to compile minimad.c is with the make minimad.exe command (gcc -fprofile-arcs -ftest-coverage minimad.c does not work in Cygwin as far as I can understand). Can anyone help me compile minimad.c with coverage in Cygwin??!! Regards, Håvard

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RE: [mad-dev] malloc to static array
by Steve Calfee 15 Oct '05

15 Oct '05

>Subject: [mad-dev] malloc to static array >Date: Thu, 13 Oct 2005 16:46:15 -0700 > > >Hello Everyone, > >Thanks for taking the time to read this. Im trying to replace some of the >malloc's used in madlib as to avoid the overhead of malloc, since I am >using >a SHARC DSP with limited memory and power. Anyway as per Andre's February >2002 post,he suggests using static array's to contain the data rather than >a >malloc, which makes sense. My problem is that Im not sure how to do that. >It >sound simple but not being an overly experienced programmer, Im not sure >what data type the array should be to house the data within a struct. Sorry >I've tried a number of things but just am not sure how to do this. The >orignal code in decoder.c, mad_decoder_run function is: > >decoder->sync = malloc(sizeof(*decoder->sync)); > >using an unsigned char array such as: > >unsigned char syncDat[2000]; //sizeof originally yields ~1650 bytes, so >2000 should be suffice > >and replacing the line of code with: > >decoder->sync = syncDat[0]; > >Produces the following error > >".\decoder.c", line 558: cc0513: {D} warning: a value of type "unsigned >char" > cannot be assigned to an entity of type "struct <unnamed> *" > decoder->sync = syncDat[0]; > ^ >Its obvious Im not completely sure what Im doing here. Any advice would be >appreciated. Thanks! > >Matt > > > This is really a C question. You could use either: decoder->sync = &syncDat[0]; or decoder->sync = syncDat; And both of these assume that decoder->sync point to an array of unsigned char, ie defined unsigned char *syncDat; or equivalent in a struct. HTH, Steve.

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Re: mad-dev Digest, Vol 5, Issue 7
by freeoicq＠huawei.com 14 Oct '05

14 Oct '05

mad-dev-request,您好！ Do not use madplay, it is difficult to port it to the embedded system.So I advice you use madlld. It is easy to port to the embedded system. And also you can make MP3 API from it. ======= 2005-10-13 12:00:00 您在来信中写道：======= >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. MADPLAY on embedded processor (DSP) (Gang-Ryung Uh) > 2. reference book regarding madplay (Gang-Ryung Uh) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Thu, 13 Oct 2005 05:03:59 -0700 (PDT) >From: Gang-Ryung Uh <uh18104(a)yahoo.com> >Subject: [mad-dev] MADPLAY on embedded processor (DSP) >To: mad-dev(a)lists.mars.org >Message-ID: <20051013120359.57146.qmail(a)web50311.mail.yahoo.com> >Content-Type: text/plain; charset=iso-8859-1 > >Hello, > > we are trying to port madplay to old digital signal >processor (DSP16000). Since it doesn't support OS, >file stream is not supported. Could any of you can >help us get started with this graduate project? >Thanks in advance, > > > >__________________________________ >Yahoo! Music Unlimited >Access over 1 million songs. Try it free. >http://music.yahoo.com/unlimited/ > > >------------------------------ > >Message: 2 >Date: Thu, 13 Oct 2005 07:18:09 -0700 (PDT) >From: Gang-Ryung Uh <uh18104(a)yahoo.com> >Subject: [mad-dev] reference book regarding madplay >To: mad-dev(a)lists.mars.org >Message-ID: <20051013141809.83118.qmail(a)web50306.mail.yahoo.com> >Content-Type: text/plain; charset=iso-8859-1 > >We are looking for a reference book for madplay. >Could you advise us what would be the good book to >understand the internal of madplay? > >Thanks, > > > > >__________________________________ >Yahoo! Mail - PC Magazine Editors' Choice 2005 >http://mail.yahoo.com > > >End of mad-dev Digest, Vol 5, Issue 7 >************************************* = = = = = = = = = = = = = = = = = = = = 　　　　　　　　致礼！　　　　　　　　freeoicq 　　　　　　　　freeoicq(a)huawei.com 　　　　　　　　　　2005-10-14

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mad-dev October 2005