Re: [Bluez-devel] a2play and Toshiba SR-1 Bluetooth Headset

[Alain Volmat <avolmat@src.ricoh.co.jp>]

Hi marcel,


* Marcel Holtmann [Fri, 26 Nov 2004 at 05:29 +0100]
<quote>
> Hi Alain,
> 
> > > You can try to hack the a2play.c to use SEID 3 instead of 1 and see what
> > > the audio sink on SEID 3 offers you. Run the hcidump 1.15.
> > 
> > The SEID 1 is pretty weird in fact ... at least doesn't offer things that
> > can be decoded by hcidump (sorry guys .. just no time now to read AV specs 
> > in details).
> 
> you meant SEID 3, right? Please do the same for SEID 4. We can't do
> anything useful with audio source, but it is nice to know what it is.

Yeah sorry, that was SEID 3. In case of SEID 4, it is same as SEID 3,
but here's the log:

> ACL data: handle 0x0028 flags 0x02 dlen 12
    L2CAP(d): cid 0x0041 len 8 [psm 25]
      AVDTP(s): Discover rsp: transaction 0
        ACP SEID 1 - Audio Sink
        ACP SEID 3 - Audio Sink
        ACP SEID 4 - Audio Source
< ACL data: handle 0x0028 flags 0x02 dlen 7
    L2CAP(d): cid 0x0040 len 3 [psm 25]
      AVDTP(s): Capabilities cmd: transaction 1
        ACP SEID 4
> HCI Event: Number of Completed Packets (0x13) plen 5
> ACL data: handle 0x0028 flags 0x02 dlen 19
    L2CAP(d): cid 0x0041 len 15 [psm 25]
      AVDTP(s): Capabilities rsp: transaction 1
        Media Transport
        Media Codec - non-A2DP
          04 00 01 00 01 00 FC

Alain


> 
> > > ACL data: handle 0x0028 flags 0x02 dlen 12
> >     L2CAP(d): cid 0x0041 len 8 [psm 25]
> >       AVDTP(s): Discover rsp: transaction 0
> >         ACP SEID 1 - Audio Sink
> >         ACP SEID 3 - Audio Sink
> >         ACP SEID 4 - Audio Source
> > < ACL data: handle 0x0028 flags 0x02 dlen 7
> >     L2CAP(d): cid 0x0040 len 3 [psm 25]
> >       AVDTP(s): Capabilities cmd: transaction 1
> >         ACP SEID 3
> > > HCI Event: Number of Completed Packets (0x13) plen 5
> > > ACL data: handle 0x0028 flags 0x02 dlen 19
> >     L2CAP(d): cid 0x0041 len 15 [psm 25]
> >       AVDTP(s): Capabilities rsp: transaction 1
> >         Media Transport
> >         Media Codec - non-A2DP
> >           04 00 01 00 01 00 FC
> 
> So they use their own codec here. It is fine, but doesn't help us and
> even the specification wouldn't tell us anymore. Actually I expect to
> see a MP3 codec.
> 
> Regards
> 
> Marcel
> 
> 
> 
> 
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</quote>


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