Return-Path: Subject: Re: [Bluez-devel] sco link help needed From: Marcel Holtmann To: Mauro Tortonesi Cc: James Courtier-Dutton , Fred =?ISO-8859-1?Q?Sch=E4ttgen?= , BlueZ Mailing List , Simon Vogl In-Reply-To: <200402251359.00791.mtortonesi@ing.unife.it> References: <4034CA08.50500@soft.uni-linz.ac.at> <40393D4D.5070908@superbug.demon.co.uk> <1077522938.2832.84.camel@pegasus> <200402251359.00791.mtortonesi@ing.unife.it> Content-Type: text/plain Message-Id: <1077715546.2919.77.camel@pegasus> Mime-Version: 1.0 Sender: bluez-devel-admin@lists.sourceforge.net Errors-To: bluez-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Date: Wed, 25 Feb 2004 14:25:46 +0100 Hi Mauro, > > Yes it have to. You should read the mailing list archive and search for > > comments from the CSR guys about SCO. And you can of course take the > > Bluetooth specification itself. > > could you please provide a url? the Bluetooth specification can be found under www.bluetooth.org and the links to the mailing list archives are at www.bluez.org. > i have been trying to transfer pcm data over a sco socket both using scotest > and other similar apps of mine, but the actual data tranferred were only a > bunch of random bytes, completely unrelated to the data sent. moreover, the > behaviour of sco links is very unreliable. in my tests i have used several > usb dongles with CSR chips (firmware versions ranging from HCI 15.3 to HCI > 16.4) and kernel versions from 2.4.22 to 2.4.25-pre7. > > you have told us many times that there are strong limitations in what you can > do with sco sockets, but i still can't understand what are these limitations. > i have tried searching trough the archives but i couldn't find anything > interesting about this. How often must I repeat this? We are doing audio over SCO and no data transfer. Even with transparent SCO as air coding the results on both ends must not be the same. > > Again, I can't follow what you are trying to achieve. The current socket > > interface for SCO fits not perfect, because it is audio only data. > > does this mean that you simply can't perform pcm audio transfers between two > bluez hosts by using sco sockets just like scotest does? if so, what is the > purpose of scotest, then? You can send PCM audio over a SCO socket, but you can't expect that the PCM stream on the other side is byte by byte the same. It only sounds the same. Regards Marcel ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel