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#pragma once
#include <vector>
#include <kms++/framebuffer.h>
#include <kms++util/color16.h>
#include "conv-common.h"
namespace kms
{
/* YUV Packed */
template<ComponentType C0, ComponentType C1, ComponentType C2, ComponentType C3>
struct YUV_Packed_Format
: public FormatLayout<
PlaneLayout<uint32_t,
ComponentLayout<C0, 8, 0>,
ComponentLayout<C1, 8, 8>,
ComponentLayout<C2, 8, 16>,
ComponentLayout<C3, 8, 24>
>
>
{
};
// Define common packed YUV formats
using YUYV_Layout = YUV_Packed_Format<ComponentType::Y0, ComponentType::Cb,
ComponentType::Y1, ComponentType::Cr>;
using YVYU_Layout = YUV_Packed_Format<ComponentType::Y0, ComponentType::Cr,
ComponentType::Y1, ComponentType::Cb>;
using UYVY_Layout = YUV_Packed_Format<ComponentType::Cb, ComponentType::Y0,
ComponentType::Cr, ComponentType::Y1>;
using VYUY_Layout = YUV_Packed_Format<ComponentType::Cr, ComponentType::Y0,
ComponentType::Cb, ComponentType::Y1>;
template<typename Layout>
class YUVPackedWriter
{
using Plane = Layout::template plane<0>;
using TStorage = Plane::storage_type;
static constexpr size_t y0_pos = Plane::template find_pos<ComponentType::Y0>();
static constexpr size_t y1_pos = Plane::template find_pos<ComponentType::Y1>();
static constexpr size_t cb_pos = Plane::template find_pos<ComponentType::Cb>();
static constexpr size_t cr_pos = Plane::template find_pos<ComponentType::Cr>();
public:
static void write_pattern(IFramebuffer& fb, size_t start_y, size_t end_y,
auto&& generate_line)
{
std::vector<YUV16> linebuf(fb.width());
auto view = make_strided_fb_view<TStorage>(fb.map(0), fb.height(),
fb.width() / 2, // Two pixels per storage unit
fb.stride(0));
for (size_t y = start_y; y <= end_y; y++) {
generate_line(y, linebuf);
for (size_t x = 0; x < fb.width(); x += 2) {
// Get two pixels
const YUV16& pix0 = linebuf[x];
const YUV16& pix1 = linebuf[x + 1];
std::array<uint8_t, 4> components;
components[y0_pos] = pix0.y >> 8;
components[y1_pos] = pix1.y >> 8;
components[cb_pos] = ((pix0.u + pix1.u) / 2) >> 8;
components[cr_pos] = ((pix0.v + pix1.v) / 2) >> 8;
view(y, x / 2) = Plane::pack(components);
}
}
}
};
} // namespace kms
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