[FFmpeg-devel] [FFmpeg-cvslog] avcodec/cfhd: add bayer support
Paul B Mahol
onemda at gmail.com
Mon Jul 29 19:07:49 EEST 2019
On Mon, Jul 29, 2019 at 6:05 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
> Am Mo., 29. Juli 2019 um 16:35 Uhr schrieb Paul B Mahol <git at videolan.org
> >:
>
> > +static inline void process_bayer(AVFrame *frame)
> > +{
> > + const int linesize = frame->linesize[0];
> > + uint16_t *r = (uint16_t *)frame->data[0];
> > + uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);
> > + uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);
> > + uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);
> > + const int mid = 2048;
> > +
> > + for (int y = 0; y < frame->height >> 1; y++) {
> > + for (int x = 0; x < frame->width; x += 2) {
> > + int R, G1, G2, B;
> > + int g, rg, bg, gd;
> > +
> > + g = r[x];
> > + rg = g1[x];
> > + bg = g2[x];
> > + gd = b[x];
> > + gd -= mid;
> > +
> > + R = (rg - mid) * 2 + g;
> > + G1 = g + gd;
> > + G2 = g - gd;
> > + B = (bg - mid) * 2 + g;
> > +
> > + R = av_clip_uintp2(R * 16, 16);
> > + G1 = av_clip_uintp2(G1 * 16, 16);
> > + G2 = av_clip_uintp2(G2 * 16, 16);
> > + B = av_clip_uintp2(B * 16, 16);
> > +
> > + r[x] = R;
> > + g1[x] = G1;
> > + g2[x] = G2;
> > + b[x] = B;
>
> Doesn't this mean you have to disable direct rendering?
>
Nope. Do you even know what is DR for?
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