Split direct v210 read and copy timing

SyntheticV210Feed.cpp

@@ -3,6 +3,7 @@
 
 #include <algorithm>
 #include <array>
+#include <chrono>
 #include <cstring>
 #include <sstream>
 
@@ -151,8 +152,15 @@ bool SyntheticV210Feed::supportsDirectV210Read() const
 bool SyntheticV210Feed::readV210FrameInto(
     uint32_t frameCounter,
     void* destination,
-    size_t destinationSize)
+    size_t destinationSize,
+    V210ReadTiming* timing)
 {
+    if (timing != nullptr)
+    {
+        timing->sourceReadNs = 0;
+        timing->payloadCopyNs = 0;
+    }
+
     if (destination == nullptr || mPayloads.empty())
     {
         return false;
@@ -171,7 +179,18 @@ bool SyntheticV210Feed::readV210FrameInto(
         return false;
     }
 
+    const auto copyStart = std::chrono::steady_clock::now();
     std::memcpy(destination, payload.data(), payload.size());
+    const auto copyEnd = std::chrono::steady_clock::now();
+
+    if (timing != nullptr)
+    {
+        timing->payloadCopyNs =
+            static_cast<uint64_t>(
+                std::chrono::duration_cast<std::chrono::nanoseconds>(
+                    copyEnd - copyStart).count());
+    }
+
     mGrainIndex = index;
     ++mFrameVersion;
     return true;