Re: cx18: "missing audio" for analog recordings

[Mark Lord <mlord@pobox.com>]

On 11/04/10 07:47 AM, Andy Walls wrote:
> On Sun, 2010-04-11 at 00:56 -0400, Andy Walls wrote:
>> Try this:
>>
>> 	http://linuxtv.org/hg/~awalls/cx18-audio2
>>
>> this waits 1.5 seconds after an input/channel change to see if the audio
>> standard micrcontroller can detect the standard.  If it can't, the
>> driver tells it to try a fallback detection.  Right now, only the NTSC-M
>> fallback detection is set to force a mode (i.e. BTSC), all the others
>> "fall back" to their same auto-detection.
>>
>> Some annoyances with the fallback to a forced audio standard, mode, and
>> format:
>>
>> 1. Static gets unmuted on stations with no signal. :(
>>
>> 2. I can't seem to force mode "MONO2 (LANGUAGE B)".  I'm guessing the
>> microcontroller keeps setting it back down to "MONO1 (LANGUAGE A/Mono L
>> +R channel for BTSC, EIAJ, A2)"  Feel free to experiment with the LSB of
>> the fallback setting magic number (0x1101) in
>> cx18-av-core.c:input_change().
>
> I fixed #2.  I had a bug so the first patch didn't properly set the
> fallback audio mode.
>
> I still need to fixup cx18_av_s_tuner() and cx18_av_g_tuner() to take
> into consideration that we might be using a forced audio mode vs. auto
> detection.  However, that is not essential for testing; this should be
> good enough for testing.
..

Those new patches don't want to coexist with the earlier hard/soft reset
changes.  There's always a chance that *both* things might be needed,
and the reset stuff didn't look obviously "bad".  Why dropped?

Thanks
-- 
Mark Lord
Real-Time Remedies Inc.
mlord@pobox.com