Message-ID: <4405CCC7.4060407@xmission.com>
From: Brad Midgley <bmidgley@xmission.com>
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To: bluez-devel@lists.sourceforge.net
Subject: Re: [Bluez-devel] sound skips on i.tech a2dp headset
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Date: Wed, 01 Mar 2006 09:33:11 -0700

Scott

> Thanks the the info. Just a question or two... Are you saying that
> timing information actually makes it all the way out to the headset? I
> assumed it was just raw data, and the headset just tried to play it at
> the appropriate speed. (the headset could then vary a bit depending on
> how full the buffer was) 

In order to keep latency down, the headset should not be buffering much;
it just plays stuff when it arrives. Unfortunately, in the current
headsets, we get the effects of no buffer *and* significant latency. :(

> Also, yes, the idea of having the latency info fed back to the source
> had occurred to me as well. Is there any way at all to estimate the
> delay from the headset tho? or would it just have to be a value you tune
> manually? Also, do you know if gstreamer is able to do this kind of
> thing now?

I don't know if gstreamer will do this.

I think we'd have to keep a table of typical latencies based on the
identity of the set. Bluecore03-mm probably has the same latency across
every set that uses it for example.

Brad


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