initial commit

SmpteBarsFeed.cpp

@@ -0,0 +1,114 @@
+#include "SmpteBarsFeed.hpp"
+#include "PixelFormat.hpp"
+
+#include <array>
+
+namespace
+{
+RgbColor smpteColorAt(
+    uint32_t x,
+    uint32_t y,
+    uint32_t width,
+    uint32_t height)
+{
+    // 75% SMPTE color bars: 0.75 * 255 = 191
+    static constexpr std::array<RgbColor, 8> TopBars =
+    {
+        RgbColor{191, 191, 191},  // 75% white
+        RgbColor{191, 191, 0},    // yellow
+        RgbColor{0, 191, 191},    // cyan
+        RgbColor{0, 191, 0},      // green
+        RgbColor{191, 0, 191},    // magenta
+        RgbColor{191, 0, 0},      // red
+        RgbColor{0, 0, 191},      // blue
+        RgbColor{16, 16, 16}      // black (reference)
+    };
+
+    static constexpr std::array<RgbColor, 8> MiddleBars =
+    {
+        RgbColor{16, 16, 130},    // blue -I
+        RgbColor{16, 16, 16},     // black
+        RgbColor{130, 16, 130},   // magenta +Q
+        RgbColor{16, 16, 16},     // black
+        RgbColor{16, 130, 130},   // cyan +I
+        RgbColor{16, 16, 16},     // black
+        RgbColor{191, 191, 191},  // 75% white
+        RgbColor{191, 191, 191}   // 75% white
+    };
+
+    const uint32_t topHeight = (height * 2) / 3;
+    const uint32_t middleHeight = (height * 3) / 4;
+    const size_t bar = (x * TopBars.size()) / width;
+
+    if (y < topHeight)
+    {
+        return TopBars[bar];
+    }
+
+    if (y < middleHeight)
+    {
+        return MiddleBars[bar];
+    }
+
+    const uint32_t segment = (x * 4) / width;
+
+    if (segment == 0)
+    {
+        return {0, 33, 76};       // -I (narrow cyan)
+    }
+
+    if (segment == 1)
+    {
+        return {33, 0, 51};       // +Q (purple)
+    }
+
+    if (segment == 2)
+    {
+        return {16, 16, 16};      // black
+    }
+
+    return {26, 26, 26};          // 10% gray (pluge reference)
+}
+}
+
+SmpteBarsFeed::SmpteBarsFeed(
+    uint32_t frameWidth,
+    uint32_t frameHeight)
+{
+    frame.width = frameWidth;
+    frame.height = frameHeight;
+    frame.pixels.resize(frame.width * frame.height);
+
+    for (uint32_t y = 0; y < frame.height; ++y)
+    {
+        for (uint32_t x = 0; x < frame.width; ++x)
+        {
+            frame.pixels[y * frame.width + x] =
+                packRgba8(
+                    smpteColorAt(
+                        x,
+                        y,
+                        frame.width,
+                        frame.height
+                    )
+                );
+        }
+    }
+}
+
+const VideoFrame& SmpteBarsFeed::getFrame(uint32_t frameCounter)
+{
+    (void)frameCounter;
+
+    return frame;
+}
+
+FeedRuntimeStatus SmpteBarsFeed::status() const
+{
+    return FeedRuntimeStatus::Bars;
+}
+
+std::string SmpteBarsFeed::displayName() const
+{
+    return "BARS";
+}