On Thu, Nov 19, 2015 at 8:17 AM, Michael Niedermayer <[email protected]> wrote:
> From: Michael Niedermayer <[email protected]>
>
> Signed-off-by: Michael Niedermayer <[email protected]>
> ---
> libavcodec/aacsbr.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/libavcodec/aacsbr.c b/libavcodec/aacsbr.c
> index d1e3a91..e014646 100644
> --- a/libavcodec/aacsbr.c
> +++ b/libavcodec/aacsbr.c
> @@ -73,6 +73,7 @@ static void sbr_dequant(SpectralBandReplication *sbr, int
> id_aac)
> {
> int k, e;
> int ch;
> + //TODO: Replace exp2f(0.5*x) by a LUT, the inputs are all integer and
> have a small range
Entirely possible I missed something, but exp2 gives 2^x, so if inputs
are integers, can't one simply do the necessary bit shifts and cast
implicitly to float?
I think what you meant was all inputs are half-integers or integers.
>
> if (id_aac == TYPE_CPE && sbr->bs_coupling) {
> float alpha = sbr->data[0].bs_amp_res ? 1.0f : 0.5f;
> --
> 1.7.9.5
>
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