From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Berg Subject: Re: ac3 in/out Date: Thu, 23 Mar 2006 18:06:21 +0100 Message-ID: <1143133582.8395.14.camel@localhost> References: <1142936836.4759.3.camel@localhost> <1142965025.4532.132.camel@mindpipe> <1143020483.11724.46.camel@localhost> <1143024848.11724.64.camel@localhost> <1143063593.3823.21.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-tUhFc5Npyw3Gt4sxtFL/" Return-path: In-Reply-To: <1143063593.3823.21.camel@localhost.localdomain> Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Benjamin Herrenschmidt Cc: Takashi Iwai , Lee Revell , ALSA devel List-Id: alsa-devel@alsa-project.org --=-tUhFc5Npyw3Gt4sxtFL/ Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Thu, 2006-03-23 at 08:39 +1100, Benjamin Herrenschmidt wrote: > > Ok that's what I figured. Well, it has to change if I shall be able to > > write a driver for the digital output of above chip. >=20 > Well, you can be sneaky in the meantime :) If you use small buffers and > large dbdma command lists, you can have the dbdma command list skip the > status data but that mean one output command per sample (or packet), > fairly horribly inefficient if your ratio data/status is not high :) I don't think so, since the user/channel status bits are interleaved *bitwise* :) Though there's another thing I don't yet understand. If you look at the three datasheets of the topaz chips, you'll notice that one of them is a receiver, one of them a transmitter, and the third a transceiver! Now I really wonder wtf apple is doing with them. But to find out that, I first need to write a topaz module that probes which one of the chips it is :) johannes --=-tUhFc5Npyw3Gt4sxtFL/ Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iQIVAwUARCLVi6Vg1VMiehFYAQIy1g//deQw1GCmldWo7KUIfb+DcfSh+Y0kHvs0 AYuZIER2DPZzz/FC98fGhOjyCt4joaD7inAvmvcHA+85Ck3hs15KR8177esGa50i w9kGd6iX6UrHcSVVYq2IdkBmtDFaJ9AhmHkQnnAVD8vndBzkKK3k3Gk81DGio/O6 VIV1D4+c65VESBzzDSNP9tHLlbxprrdHLqJH2oZJ38aW/OAC5HZ/zMonoVLLOPz1 PU0/Mfa5z3xhdyn61oacDRhtXDsuIDhEaATxRzR35TOY3pikr72mF8LL3uvlIAn4 OCkv4EH1kOw3uHZ3q2fx6e3ZcN91ZfvAYxFtGd9Dztu/YOKUwYeMuzWTThJffhhd Pn/XQdMKGdwS22iv6aYYGMLpG1Ip+1IeV50S0veq0pTfUjq28+clnQ4n20YKdTp8 BNBRorrXYbWaJ4EbujbNY9hh22FObrrJNDG1bMDqZGc/WtE1gKnrU0Xv/DbNT+Af LJSM2Ml0BlklERMtVhwOBcjN9H4ovJZ3ENfkeeh2Y3Nadh9LWtrWN0hqrtznH1Hr 0jAhj5afFpzSkPJOZr+pbDVwzD/36vk00DLyQltuZQchim07T61T4jemWq/vVx/k VwrTgJ3zq41Wwvl7IXji6RjCb88wE/VVEQVoVC9kZOhBBDxkqck4bFTNMSfMaroN Nq6nOSel4fg= =aXAD -----END PGP SIGNATURE----- --=-tUhFc5Npyw3Gt4sxtFL/-- ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642