Re: bin/48090 (bthset to use pad devices and support 8 bit sco audio)

[Nat Sloss <nathanialsloss%yahoo.com.au@localhost>]

The following reply was made to PR bin/48090; it has been noted by GNATS.

From: Nat Sloss <nathanialsloss%yahoo.com.au@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: bin/48090 (bthset to use pad devices and support 8 bit sco audio)
Date: Mon, 26 Aug 2013 11:18:15 +1000

 Hi Iain,
 
 While its possible to add mulaw, alaw and 8-bit slinear formats to pad. (I've 
 been experimenting) I've found a problem with the way this would work with 
 bthset using pad as I've seen the audio format change depending on what 
 you're trying to play.  Also as far as I understand opening /dev/audio would 
 default to mulaw 8000hz mono, so bthset would have to set the audio 
 parameters after the program playing audio and I don't think this would be 
 easily implemented.  
 
 So far I don't think it is practical to do the audio conversion as apart of 
 pad.  The tables I've included in bthset are duplicates fron mulaw.c and the 
 audio conversions are modified versions of audio filters fron auconv.c.  I 
 think even though there is code duplication and bthset is bigger this is 
 simple solution to handling the different formats.
 
 An interesting note the only other bluetooth sco audio formats that are not 
 supported so far are ulinear 8 and 16 bit, as I have no way of testing these 
 (not supported by my bluetooth adaptor) but I can submit my attempt at adding 
 support if you think it is a good idea.
 
 Regards,
 
 Nat.