* [Bluez-devel] avrcp volume control
@ 2005-12-15 7:01 Brad Midgley
2005-12-15 8:54 ` Marcel Holtmann
0 siblings, 1 reply; 5+ messages in thread
From: Brad Midgley @ 2005-12-15 7:01 UTC (permalink / raw)
To: bluez-devel
Guys,
My best guess at volume control over avrcp is to send volume up/down
commands to the panel subunit on the headset. It doesn't seems to do
anything (no ack/nak or change in volume on bluetake iphono mini). I was
able to confirm the operand codes with a helpful 1394 developer by the way.
Does anyone here on the list know how this really should be framed so we
can control the headset volume?
The packet I'm sending to raise the volume looks something like this in hex:
20 transaction_label=2, packet type=single, cr=command_frame, ipid=0
11 pid lo
0e pid hi
00 ctype = passthrough command
48 subunit type=panel(9), subunit id=0
7c opcode? (this is what the headset always puts here in its cmds)
41 volume-up lo
00 volume-up hi
help :)
Brad
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Bluez-devel] avrcp volume control
2005-12-15 7:01 [Bluez-devel] avrcp volume control Brad Midgley
@ 2005-12-15 8:54 ` Marcel Holtmann
2005-12-15 15:20 ` Brad Midgley
0 siblings, 1 reply; 5+ messages in thread
From: Marcel Holtmann @ 2005-12-15 8:54 UTC (permalink / raw)
To: bluez-devel
Hi Brad,
> My best guess at volume control over avrcp is to send volume up/down
> commands to the panel subunit on the headset. It doesn't seems to do
> anything (no ack/nak or change in volume on bluetake iphono mini). I was
> able to confirm the operand codes with a helpful 1394 developer by the way.
do you have the HP/Logitech headphone at hand? I can try it if you tell
me what to do. I also have a CSR based headphone for testing.
Regards
Marcel
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Bluez-devel] avrcp volume control
2005-12-15 8:54 ` Marcel Holtmann
@ 2005-12-15 15:20 ` Brad Midgley
2005-12-19 7:42 ` Brad Midgley
0 siblings, 1 reply; 5+ messages in thread
From: Brad Midgley @ 2005-12-15 15:20 UTC (permalink / raw)
To: bluez-devel
Marcel
>>My best guess at volume control over avrcp is to send volume up/down
>>commands to the panel subunit on the headset. It doesn't seems to do
>>anything (no ack/nak or change in volume on bluetake iphono mini). I was
>>able to confirm the operand codes with a helpful 1394 developer by the way.
>
>
> do you have the HP/Logitech headphone at hand? I can try it if you tell
> me what to do. I also have a CSR based headphone for testing.
I do have an hp set that I will try this weekend.
I just committed changes so the (single-threaded) avrecv test app sends
a volume up op shortly after it acks any command coming from the
headset. So punching buttons on the headset should raise the volume :(
fyi, avrecv just has to be running when you send audio to the headset.
the headset turns around and opens the avrcp connection when the stream
starts.
Brad
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-12-19 9:57 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2005-12-15 7:01 [Bluez-devel] avrcp volume control Brad Midgley
2005-12-15 8:54 ` Marcel Holtmann
2005-12-15 15:20 ` Brad Midgley
2005-12-19 7:42 ` Brad Midgley
2005-12-19 9:57 ` Marcel Holtmann
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