video run extraction

internal/video/pattern.go

@@ -0,0 +1,72 @@
+package video
+
+import "sort"
+
+type PatternInfo struct {
+	Name        string
+	Description string
+}
+
+type pattern struct {
+	PatternInfo
+	kernelPath string
+}
+
+var patterns = map[string]pattern{
+	"ebu75": {
+		PatternInfo: PatternInfo{Name: "ebu75", Description: "EBU 75% Color Bar Signal"},
+		kernelPath:  "kernels/static/ebu75.wgsl",
+	},
+	"ebu75-move": {
+		PatternInfo: PatternInfo{Name: "ebu75-move", Description: "EBU 75% Color Bar Signal with moving square"},
+		kernelPath:  "kernels/dynamic/ebu75.wgsl",
+	},
+	"ebu100": {
+		PatternInfo: PatternInfo{Name: "ebu100", Description: "EBU 100% Color Bar Signal"},
+		kernelPath:  "kernels/static/ebu100.wgsl",
+	},
+	"ebu100-move": {
+		PatternInfo: PatternInfo{Name: "ebu100-move", Description: "EBU 100% Color Bar Signal with moving square"},
+		kernelPath:  "kernels/dynamic/ebu100.wgsl",
+	},
+	"smpte": {
+		PatternInfo: PatternInfo{Name: "smpte", Description: "SMPTE RP-219 Color Bar Signal"},
+		kernelPath:  "kernels/static/smpteBars.wgsl",
+	},
+	"smpte-move": {
+		PatternInfo: PatternInfo{Name: "smpte-move", Description: "SMPTE RP-219 Color Bar Signal with moving square"},
+		kernelPath:  "kernels/dynamic/smpteBars.wgsl",
+	},
+	"gray-bars": {
+		PatternInfo: PatternInfo{Name: "gray-bars", Description: "13-step grayscale bars (Y 64..940)"},
+		kernelPath:  "kernels/static/yBars.wgsl",
+	},
+	"gray-bars-move": {
+		PatternInfo: PatternInfo{Name: "gray-bars-move", Description: "13-step grayscale bars (Y 64..940) with moving square"},
+		kernelPath:  "kernels/dynamic/yBars.wgsl",
+	},
+	"gray-ramp": {
+		PatternInfo: PatternInfo{Name: "gray-ramp", Description: "Y gradient (black -> 100% white)"},
+		kernelPath:  "kernels/static/yRamp.wgsl",
+	},
+	"gray-ramp-move": {
+		PatternInfo: PatternInfo{Name: "gray-ramp-move", Description: "Y gradient with moving square"},
+		kernelPath:  "kernels/dynamic/yRamp.wgsl",
+	},
+}
+
+func HasPattern(name string) bool {
+	_, ok := patterns[name]
+	return ok
+}
+
+func Patterns() []PatternInfo {
+	result := make([]PatternInfo, 0, len(patterns))
+	for _, pattern := range patterns {
+		result = append(result, pattern.PatternInfo)
+	}
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].Name < result[j].Name
+	})
+	return result
+}