[FFmpeg-devel] [PATCH] DCA floating point output

Måns Rullgård mans
Mon Apr 26 13:43:56 CEST 2010

Vladimir Pantelic <pan at nt.tu-darmstadt.de> writes:

> Jean-Yves Avenard wrote:
>> Hi
>> On 26 April 2010 17:45, Vladimir Pantelic<pan at nt.tu-darmstadt.de>  wrote:
>>>  dammit, my shitty D/A converter will only playback ints, not floats....
>> I don't know of any common audio cards accepting floats ; it's always
>> S16 or S32...
>> BTW, something puzzling me ...
>> Why is it up to the codec decoder to perform the downmixing ?
> some codecs (AC3?, DCA?) might do it more efficiently inside the
> decoder.

Yes, AC3 and DCA both downmix before the IMDCT.  This is much more

>> Why not have a common one ? or at least a common one for the codec
>> with no downmixer ...
> yes, that would be nice.

We'll get there one day.

M?ns Rullg?rd
mans at mansr.com

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