Add DSLogic capture, signal conversion and DSView decoders

tools/dsview/native/gate_summary.h

@@ -0,0 +1,29 @@
+#pragma once
+#include <atomic>
+#include <cstdint>
+
+// Annotation IDs are the public gate_driver_timing decoder contract.
+// Independent of row visibility and text search; one summary per decode run.
+class GateSummary {
+public:
+    void reset() {
+        controls = 0; acknowledgments = 0; warnings = 0; faults = 0;
+    }
+    void observe(int annotation) {
+        switch (annotation) {
+        case 0: ++controls; break;
+        case 2: ++acknowledgments; break;
+        case 3: ++warnings; break;
+        case 4: case 5: ++faults; break;
+        }
+    }
+    // 0 = OK, 1 = WARNING / incomplete, 2 = FAULT.
+    int severity(bool complete) const {
+        if (faults.load()) return 2;
+        if (!complete || warnings.load() || !acknowledgments.load() ||
+            controls.load() != acknowledgments.load()) return 1;
+        return 0;
+    }
+private:
+    std::atomic<uint64_t> controls{0}, acknowledgments{0}, warnings{0}, faults{0};
+};