[mythtv] [PATCH] MythPhone - prevent sending garbage video when webcam grabs smaller video than we want to send

Ed Wildgoose lists at wildgooses.com
Wed Jan 26 17:02:39 EST 2005


Jeremiah Morris wrote:

> On 26 Jan 2005, at 10:13 AM, Malte Böhme wrote:
>
>> i am currently working on
>> konference again and would like to add a more flexible way of 
>> handling audio
>> input/output. have you ever looked at kphone source? they have a more
>> flexible way of handling audio (alsa, oss, jack).
>
>
> Actually, so does Myth; in libmyth there's a set of audio output 
> classes with drivers for Alsa, OSS, JACK and more. Ed Wildgoose 
> revamped this API and converted mythmusic to use it; that's the right 
> thing for mythphone to do, to gain extra flexibility at very little 
> cost. Perhaps this code would work for your needs in konference, at 
> least for the output part of the problem.
>

I would be quite happy to recode it to allow input and output.

Having synchronised in and out audio will be essential if we ever want 
to support accoustic echo cancellation.  I have been reading up on some 
algorithms, it's quite complicated though and there is no algorithm 
coded up (for free) that I can see.  It's something of a special case of 
the room correction stuff that I use in my hifi setup though.

Will take a look as I get a chance

Ed W


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