+static int flip_bayer(AVFilterLink *link, AVFrame *in)
+{
+ AVFilterContext *ctx = link->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ AVFrame *out;
+ uint8_t *inrow = in->data[0], *outrow;
+ int i, width = outlink->w << (av_pix_fmt_desc_get(link->format)->comp[0].step > 1);
+ if (outlink->h & 1) {
+ av_log(ctx, AV_LOG_ERROR, "Bayer vertical flip needs even height\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+ av_frame_copy_props(out, in);
+ outrow = out->data[0] + out->linesize[0] * (outlink->h - 2);
+ for (i = 0; i < outlink->h >> 1; i++) {
+ memcpy(outrow, inrow, width);
+ memcpy(outrow + out->linesize[0], inrow + in->linesize[0], width);
+ inrow += 2 * in->linesize[0];
+ outrow -= 2 * out->linesize[0];
+ }
+ av_frame_free(&in);
+ return ff_filter_frame(outlink, out);
+}
+