Return-Path: Message-ID: <007501c5a35c$d1fc51a0$640aa8c0@ROBYHOME> From: "Roberto" To: References: <013e01c5a30a$b9329eb0$050aa8c0@gateway> <430351BD.7090100@xmission.com> <000e01c5a355$e6b0a0d0$0201a8c0@NBVICTOR> Subject: Re: [Bluez-devel] SBC Fixed Point for A2Dp MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Sender: bluez-devel-admin@lists.sourceforge.net Errors-To: bluez-devel-admin@lists.sourceforge.net Reply-To: bluez-devel@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ development List-Post: List-Help: List-Subscribe: , List-Archive: Date: Wed, 17 Aug 2005 20:52:29 +0200 thanks for the update my main poblem is that working with Mobile at around 100,10 Mhz it is quite slow this ckind of calculation , the one that I have (sbc.c floating point) is totally slow so I hope you will implement oen a little bit better and then I can improve on mobile, if you have time to send me a version so I can test it on these days because i'm not in vacation :) Ciao Roberto ----- Original Message ----- From: "Victor Shcherbatyuk" To: Sent: Wednesday, August 17, 2005 8:02 PM Subject: Re: [Bluez-devel] SBC Fixed Point for A2Dp > It will be out there by the end of the week, we already have ARM specific > 64-bit precise version which runs within around 30 MIPS and does not sound > noisy, I'm finishing general 64-bit thing (uses long long for multiplication > result) to make it complete and currently integrating it into the a2dp code. > I'm on vacation now, so the progress is slow... > > Victor. > > ----- Original Message ----- > From: "Brad Midgley" > To: > Sent: Wednesday, August 17, 2005 17:03 > Subject: Re: [Bluez-devel] SBC Fixed Point for A2Dp > > > > Roberto > > > >> I have read some transcoding to SBC fixed point somewhere , do you know > >> where become available ? We are working on a mobile version of A2DP with > >> headphones for Symbian and we would like to port this part of code to > >> mobile and deliver the library under LGPL > > > > I hope you are able to help us with this. We currently have no > > implementation. Victor Shcherbatyuk has been tinkering with fixed point > > but was getting noisy audio last I heard and has not contributed anything > > yet. > > > > If you look in sbc/sbc.h, you'll see some fixed point functions like > > fxmult and conversion functions. Currently, the precision is set to 20 > > bits. This is probably not enough, but after you change it to get more > > precision, the fixed point tables in sbc_tables_f.h need to be > > regenerated; build gen_fixed.c by hand and run > > > > ./gen_fixed > sbc_tables_f.h > > > > to do that. > > > > Can I help in any other way? > > > > thanks! > > Brad > > > > > > ------------------------------------------------------- > > SF.Net email is Sponsored by the Better Software Conference & EXPO > > September 19-22, 2005 * San Francisco, CA * Development Lifecycle > > Practices > > Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA > > Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf > > _______________________________________________ > > Bluez-devel mailing list > > Bluez-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/bluez-devel > > > > ------------------------------------------------------- > SF.Net email is Sponsored by the Better Software Conference & EXPO > September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices > Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA > Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel > ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel