[x265] Max TU Size

[Nicolas Morey-Chaisemartin]

Ok, I'll cleanup and post my patch for that.
Also, both max and min TU size are computed in encoder.cpp and params.cpp (once for check, once for the real usage).
Would it make sense to store this value somewhere so we can be sure that the value is always the same on both side?

Nicolas

On 10/23/2014 04:39 PM, Steve Borho wrote:
> On 10/23, Nicolas Morey-Chaisemartin wrote:
>> Quick question about the max TU size.
>> It used to be something like
>> tuQTMaxLog2Size = MIN(5, maxLog2CUSize)
>>
>> Now it is simply maxLog2CUSize -1.
>> It makes no difference for 64x64 CTU but it tends to worsen quality (or increase bitrate) for smaller CTU sizes.
>>
>> Is this a wanted behaviour and if so, why?
> I don't remember this change being made. The MIN() made sense, since
> transforms can't be 64x64. I would be ok returning the old behavior.
>