kern/152622: [pcm] uaudio recording problem

[Hans Petter Selasky]

The following reply was made to PR kern/152622; it has been noted by GNATS.

From: Hans Petter Selasky <hselasky at c2i.net>
To: Thierry Thomas <thierry at freebsd.org>
Cc: FreeBSD-gnats-submit at freebsd.org,
 freebsd-multimedia at freebsd.org,
 bug-followup at freebsd.org
Subject: Re: kern/152622: [pcm] uaudio recording problem
Date: Mon, 11 Apr 2011 09:33:29 +0200

 On Sunday 10 April 2011 12:03:29 Thierry Thomas wrote:
 > Apr 10 12:00:01 graf kernel: ugen4.3: <vendor 0x046d> at usbus4
 > Apr 10 12:00:01 graf kernel: uaudio0: <vendor 0x046d product 0x0825, class
 > 239/2, rev 2.00/0.10, addr 3> on usbus4 Apr 10 12:00:01 graf kernel:
 > uaudio_chan_dump_ep_desc: endpoint=0xc73d3995 bLength=9 bDescriptorType=5
 > Apr 10 12:00:01 graf kernel: bEndpointAddress=134 bmAttributes=0x5 Apr 10
 > 12:00:01 graf kernel: wMaxPacketSize=196 bInterval=4
 > Apr 10 12:00:01 graf kernel: bRefresh=0 bSynchAddress=0
 
 The wMaxPacketSize should be 96 = 2 * 48 and not 196. Maybe your audio device 
 delivers data in chunks of data instead of a steady stream. I'll look into it 
 later today.
 
 --HPS