From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <5dcacb1f0707131405l41a8b8b3l7bc14bc519b447cb@mail.gmail.com> Date: Fri, 13 Jul 2007 14:05:18 -0700 From: "Chulwoong Jeon" To: bluez-devel@lists.sourceforge.net MIME-Version: 1.0 Subject: [Bluez-devel] Float point SBC codec Reply-To: BlueZ development List-Id: BlueZ development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Sender: bluez-devel-bounces@lists.sourceforge.net Errors-To: bluez-devel-bounces@lists.sourceforge.net I have been looking for the float point version sbc codec 'btsco' and trying to cvs under bluetooth-alsa web page but couldn't download it. Would you let me know where I can find the float point sbc codec source code? Chulwoong > Chulwoong > > I'm responsible for any breakage in the decoder. I took the working > floating point and converted it to fixed point and also reworked the > algorithm. > > If you want to compare the last floating point version to see if it's > less noisy, check out the cvs project "btsco" from bluetooth-alsa and > ./configure and build it. You'll get the app sbcdec that can decode a > stream and play it. > > I'll check on the change you recommended. > > The mailing list bluez-devel is a better place to ask than in private > email since there are likely to be others on the list who have tried the > decoder. > > Brad > > > I have several questions about your SBC codec. Currently, I am > > evaluating your SBC codec and able to decode SBC streams. > > > > In order to evaluate your SBC codec, I downloaded a test package from > > https://www.bluetooth.org/foundry/adopters/document/AV_101_sbc_bitstreams_test/en/1/AV_101_sbc_bitstreams_test.zip > > > > . I compared your decoder outputs with the reference decoder outputs > > in the link, but the outputs from your decoder are nosier. I wonder > > whether if my build of your codec is wrong or not. When I downloaded > > the original project from http://sourceforge.net/projects/sbc/ , I > > couldn't make your decoder work so that I made a small change. Please, > > see below. > > > > In ' sbc_math_.h ' > > > > Original: > > #define SCALE4_STAGED2_BITS 23 > > #define SCALE8_STAGED2_BITS 23 > > > > Modification: > > #define SCALE4_STAGED2_BITS 30 > > #define SCALE8_STAGED2_BITS 30 > > > > I wonder if you are able to give me any your decoder outputs using the > > reference files in the link above. > > > > I am looking forward to have any answers from you. > > > > Best regards, > > > > Chulwoong > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel