On date Monday 2023-12-11 02:35:30 +0100, Clément Bœsch wrote:
> This matches the code from proresenc_kostya.
> ---
> libavcodec/proresenc_anatoliy.c | 9 +--------
> 1 file changed, 1 insertion(+), 8 deletions(-)
>
> diff --git a/libavcodec/proresenc_anatoliy.c b/libavcodec/proresenc_anatoliy.c
> index 0318379461..88c6d47ab7 100644
> --- a/libavcodec/proresenc_anatoliy.c
> +++ b/libavcodec/proresenc_anatoliy.c
> @@ -258,13 +258,6 @@ static void encode_vlc_codeword(PutBitContext *pb,
> unsigned codebook, int val)
> #define GET_SIGN(x) ((x) >> 31)
> #define MAKE_CODE(x) (((x) * 2) ^ GET_SIGN(x))
>
> -static av_always_inline int get_level(int val)
> -{
> - int sign = (val >> 31);
> - return (val ^ sign) - sign;
> -}
> -
> -
> static void encode_dcs(PutBitContext *pb, int16_t *blocks,
> int blocks_per_slice, int scale)
> {
> @@ -305,7 +298,7 @@ static void encode_ac_coeffs(PutBitContext *pb,
>
> prev_run = run;
> run = 0;
> - level = get_level(val);
> + level = FFABS(val);
> code = level - 1;
LGTM, given that (for sign = 1):
val ^ sign = val + 1
val + 1 - 1 = val + 1 + 2**N -1 = val + 2**N = ABS(val)
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