Linux-Bluetooth Archive on lore.kernel.org
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From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: "Pali Rohár" <pali.rohar@gmail.com>
Cc: "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>
Subject: Re: bluez A2DP socket reliability
Date: Sun, 19 May 2019 11:13:09 +0300
Message-ID: <CABBYNZ+8YX-zBnUaYKLX2=OdJ-GUQ4y4V0EhGsN+uecKEpFBeA@mail.gmail.com> (raw)
In-Reply-To: <20190518190618.m7rdkthvpz4agxd2@pali>

Hi Pali,

On Sat, May 18, 2019 at 11:12 PM Pali Rohár <pali.rohar@gmail.com> wrote:
>
> Hello! How is L2CAP layer of bluetooth socket used for A2DP audio
> transfer configured in bluez? It is reliable with big/infinite
> retransmit count? Or in best-effort manner and some packets may be
> dropped? And it is possible to change between these two modes for
> application which uses bluez DBUS API? I'm asking because some A2DP
> audio codecs are designed to deal with packet loss and for those codecs
> it would be probably better to configure L2CAP socket to unreliable
> mode.

We don't use ERTM with AVDTP, both signaling and transport sockets are
using basic mode which don't support retransmissions, there the
concept of flush timeout which iirc we don't currently it.


-- 
Luiz Augusto von Dentz

  reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-18 19:06 Pali Rohár
2019-05-19  8:13 ` Luiz Augusto von Dentz [this message]
2019-05-19 12:22   ` Pali Rohár
2019-06-07 13:00     ` Pali Rohár
2019-06-07 15:23       ` Luiz Augusto von Dentz
2019-06-10 10:51         ` Pali Rohár
2019-06-10 12:16           ` Luiz Augusto von Dentz
2019-06-10 16:06           ` Frédéric Danis
2019-06-14  7:16             ` Pali Rohár

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