Re: [FFmpeg-devel] [PATCH v4 1/4] swscale/input: add rgbaf32 input support

[Michael Niedermayer <michael@niedermayer.cc>]

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On Mon, Nov 21, 2022 at 02:11:43PM -0800, mindmark@gmail.com wrote:
> From: Mark Reid <mindmark@gmail.com>
> 
> ---
>  libswscale/input.c | 120 +++++++++++++++++++++++++++++++++++++++++++++
>  libswscale/utils.c |   6 +++
>  2 files changed, 126 insertions(+)
> 
> diff --git a/libswscale/input.c b/libswscale/input.c
> index d5676062a2..a305be5ac2 100644
> --- a/libswscale/input.c
> +++ b/libswscale/input.c
> @@ -1284,6 +1284,96 @@ static void rgbaf16##endian_name##ToA_c(uint8_t *_dst, const uint8_t *_src, cons
>  rgbaf16_funcs_endian(le, 0)
>  rgbaf16_funcs_endian(be, 1)
>  
> +#define rdpx(src) (is_be ? av_int2float(AV_RB32(&src)): av_int2float(AV_RL32(&src)))
> +
> +static av_always_inline void rgbaf32ToUV_endian(uint16_t *dstU, uint16_t *dstV, int is_be,
> +                                                const float *src, int width,
> +                                                int32_t *rgb2yuv, int comp)
> +{
> +    int32_t ru = rgb2yuv[RU_IDX], gu = rgb2yuv[GU_IDX], bu = rgb2yuv[BU_IDX];
> +    int32_t rv = rgb2yuv[RV_IDX], gv = rgb2yuv[GV_IDX], bv = rgb2yuv[BV_IDX];
> +    int i;
> +    for (i = 0; i < width; i++) {
> +        int r = lrintf(av_clipf(65535.0f * rdpx(src[i*comp+0]), 0.0f, 65535.0f));
> +        int g = lrintf(av_clipf(65535.0f * rdpx(src[i*comp+1]), 0.0f, 65535.0f));
> +        int b = lrintf(av_clipf(65535.0f * rdpx(src[i*comp+2]), 0.0f, 65535.0f));
> +
> +        dstU[i] = (ru*r + gu*g + bu*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
> +        dstV[i] = (rv*r + gv*g + bv*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
> +    }
> +}





> +
> +static av_always_inline void rgbaf32ToY_endian(uint16_t *dst, const float *src, int is_be,
> +                                               int width, int32_t *rgb2yuv, int comp)
> +{
> +    int32_t ry = rgb2yuv[RY_IDX], gy = rgb2yuv[GY_IDX], by = rgb2yuv[BY_IDX];
> +    int i;
> +    for (i = 0; i < width; i++) {
> +        int r = lrintf(av_clipf(65535.0f * rdpx(src[i*comp+0]), 0.0f, 65535.0f));
> +        int g = lrintf(av_clipf(65535.0f * rdpx(src[i*comp+1]), 0.0f, 65535.0f));
> +        int b = lrintf(av_clipf(65535.0f * rdpx(src[i*comp+2]), 0.0f, 65535.0f));
> +
> +        dst[i] = (ry*r + gy*g + by*b + (0x2001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
> +    }
> +}

I thought you would post a patchset that in the end has 1 lrintf/av_clipf
for a function like this not 3
Just asking as you arent saying this is temporary in this set nor why its
left liek this nor does it include the factorization of these operations

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I have never wished to cater to the crowd; for what I know they do not
approve, and what they approve I do not know. -- Epicurus

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