Re: rounding issue with RTCRtpEncodingParameters scales?

I think we can until we run into real implementation issues.  I have a
feeling it won't be a big deal.


On Thu, Jul 17, 2014 at 12:37 PM, Robin Raymond <robin@hookflash.com> wrote:

>
> dictionary RTCRtpEncodingParameters {
>     //...
>     double              resolutionScale;
>     double              framerateScale;
> }
>
> These are floats with relative values. The trouble is that there are fixed
> geometric relations. It must be 1.0, 0.5, 0.25, 0.125, etc for resolution
> scaling…
>
> Maybe this isn’t an issue but I’m a bit concerned that float rounding
> issues might cause us problems.
>
> For example, if you start at a base scale of 0.3 (i.e. resolution is 0.3
> of source), are the layerings relative to 0.3, i.e. (1/1 * 0.3), (1/2 *
> 0.3), (1/4 * 0.3) ?
>
> or would the scale be like this:
> 0.3, 1/1, 1/2, 1/4, 1/8, etc?
>
> Also if people use dividers vs fixed value like: 1/8 vs 0.125, could we
> end up in situations where the values almost match but don’t quite due to
> float rounding problems?
>
>
> Just a concern…
>
> Robin
>
>