Johanness
115 lines
2.6 KiB
C++
115 lines
2.6 KiB
C++
#include "SmpteBarsFeed.hpp"
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#include "PixelFormat.hpp"
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#include <array>
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namespace
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{
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RgbColor smpteColorAt(
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uint32_t x,
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uint32_t y,
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uint32_t width,
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uint32_t height)
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{
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// 75% SMPTE color bars: 0.75 * 255 = 191
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static constexpr std::array<RgbColor, 8> TopBars =
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{
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RgbColor{191, 191, 191}, // 75% white
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RgbColor{191, 191, 0}, // yellow
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RgbColor{0, 191, 191}, // cyan
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RgbColor{0, 191, 0}, // green
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RgbColor{191, 0, 191}, // magenta
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RgbColor{191, 0, 0}, // red
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RgbColor{0, 0, 191}, // blue
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RgbColor{16, 16, 16} // black (reference)
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};
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static constexpr std::array<RgbColor, 8> MiddleBars =
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{
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RgbColor{16, 16, 130}, // blue -I
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RgbColor{16, 16, 16}, // black
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RgbColor{130, 16, 130}, // magenta +Q
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RgbColor{16, 16, 16}, // black
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RgbColor{16, 130, 130}, // cyan +I
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RgbColor{16, 16, 16}, // black
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RgbColor{191, 191, 191}, // 75% white
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RgbColor{191, 191, 191} // 75% white
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};
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const uint32_t topHeight = (height * 2) / 3;
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const uint32_t middleHeight = (height * 3) / 4;
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const size_t bar = (x * TopBars.size()) / width;
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if (y < topHeight)
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{
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return TopBars[bar];
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}
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if (y < middleHeight)
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{
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return MiddleBars[bar];
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}
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const uint32_t segment = (x * 4) / width;
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if (segment == 0)
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{
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return {0, 33, 76}; // -I (narrow cyan)
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}
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if (segment == 1)
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{
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return {33, 0, 51}; // +Q (purple)
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}
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if (segment == 2)
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{
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return {16, 16, 16}; // black
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}
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return {26, 26, 26}; // 10% gray (pluge reference)
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}
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}
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SmpteBarsFeed::SmpteBarsFeed(
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uint32_t frameWidth,
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uint32_t frameHeight)
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{
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frame.width = frameWidth;
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frame.height = frameHeight;
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frame.pixels.resize(frame.width * frame.height);
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for (uint32_t y = 0; y < frame.height; ++y)
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{
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for (uint32_t x = 0; x < frame.width; ++x)
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{
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frame.pixels[y * frame.width + x] =
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packRgba8(
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smpteColorAt(
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x,
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y,
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frame.width,
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frame.height
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)
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);
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}
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}
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}
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const VideoFrame& SmpteBarsFeed::getFrame(uint32_t frameCounter)
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{
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(void)frameCounter;
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return frame;
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}
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FeedRuntimeStatus SmpteBarsFeed::status() const
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{
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return FeedRuntimeStatus::Bars;
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}
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std::string SmpteBarsFeed::displayName() const
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{
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return "BARS";
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}
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