The open source OpenXR runtime
a/util: Add half scale frame sink
Useful for when you're dealing with a camera that's too high res you're trying to calibrate
Part-of: <https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2457>
authored by
Beyley Cardellio
and committed by
Marge Bot
4b38d313
aadd2eb8
+54
+5
src/xrt/auxiliary/util/u_sink.h
+5
src/xrt/auxiliary/util/u_sink.h
···
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struct xrt_frame_sink *downstream,
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struct xrt_frame_sink **out_xfs);
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void
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u_sink_create_half_scale(struct xrt_frame_context *xfctx,
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struct xrt_frame_sink *downstream,
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struct xrt_frame_sink **out_xfs);
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/*!
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* @public @memberof xrt_frame_sink
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* @see xrt_frame_context
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src/xrt/auxiliary/util/u_sink_converter.c
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src/xrt/auxiliary/util/u_sink_converter.c
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*out_xfs = &s->base;
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}
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static void
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convert_half_scale(struct xrt_frame_sink *xs, struct xrt_frame *xf)
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{
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struct u_sink_converter *s = (struct u_sink_converter *)xs;
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uint32_t w = xf->width / 2;
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uint32_t h = xf->height / 2;
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struct xrt_frame *converted = NULL;
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if (!create_frame_with_format_of_size(xf, w, h, XRT_FORMAT_L8, &converted)) {
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return;
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}
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for (uint32_t x = 0; x < w; x++) {
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for (uint32_t y = 0; y < h; y++) {
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uint16_t sum = 0;
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sum += xf->data[((y * 2) * xf->stride) + (x * 2)];
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sum += xf->data[((y * 2) * xf->stride) + (x * 2) + 1];
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sum += xf->data[(((y * 2) + 1) * xf->stride) + (x * 2)];
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sum += xf->data[(((y * 2) + 1) * xf->stride) + (x * 2) + 1];
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converted->data[(y * converted->stride) + x] = sum / 4;
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}
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}
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s->downstream->push_frame(s->downstream, converted);
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// Refcount in case it's being held downstream.
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xrt_frame_reference(&converted, NULL);
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}
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void
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u_sink_create_half_scale(struct xrt_frame_context *xfctx,
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struct xrt_frame_sink *downstream,
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struct xrt_frame_sink **out_xfs)
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{
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assert(downstream != NULL);
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struct u_sink_converter *s = U_TYPED_CALLOC(struct u_sink_converter);
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s->base.push_frame = convert_half_scale;
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s->node.break_apart = break_apart;
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s->node.destroy = destroy;
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s->downstream = downstream;
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xrt_frame_context_add(xfctx, &s->node);
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*out_xfs = &s->base;
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}