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

[Mark Reid]

On Tue, Nov 22, 2022 at 2:43 PM Michael Niedermayer <michael at niedermayer.cc>
wrote:

> On Tue, Nov 22, 2022 at 01:17:09PM -0800, Mark Reid wrote:
> > On Tue, Nov 22, 2022 at 11:43 AM Michael Niedermayer <
> michael at niedermayer.cc>
> > wrote:
> >
> > > On Mon, Nov 21, 2022 at 02:11:43PM -0800, mindmark at gmail.com wrote:
> > > > From: Mark Reid <mindmark at 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
> > >
> > >
> > Sorry I must have misunderstood. I was hoping I could leave it like this
> > temporarily as it matches the planar f32 version and address the
> > factorization separate patchset.
>
> you can, i just want to make sure its not forgotten. Maybe you can add
> some note to the commit message that this will be addressed in a future
> pachset
>
>
Okay, I'll add a note to the commit message and I'll add a comment to the
code too.


> thx
>
>
> [...]
> --
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> If the United States is serious about tackling the national security
> threats
> related to an insecure 5G network, it needs to rethink the extent to which
> it
> values corporate profits and government espionage over security.-Bruce
> Schneier
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".
>