Keep/turn the display on during streaming

IDXGIDuplication::DuplicateOutput() may fail with 0x80070005 if the display is off and cause streaming to fail

src/platform/windows/display_base.cpp

@@ -110,6 +110,15 @@ namespace platf::dxgi {
       CloseHandle(timer);
     });
 
+    // Keep the display awake during capture. If the display goes to sleep during
+    // capture, best case is that capture stops until it powers back on. However,
+    // worst case it will trigger us to reinit DD, waking the display back up in
+    // a neverending cycle of waking and sleeping the display of an idle machine.
+    SetThreadExecutionState(ES_CONTINUOUS | ES_DISPLAY_REQUIRED);
+    auto clear_display_required = util::fail_guard([]() {
+      SetThreadExecutionState(ES_CONTINUOUS);
+    });
+
     while (true) {
       // This will return false if the HDR state changes or for any number of other
       // display or GPU changes. We should reinit to examine the updated state of
@@ -342,6 +351,7 @@ namespace platf::dxgi {
     auto output_name = converter.from_bytes(display_name);
 
     adapter_t::pointer adapter_p;
+    for (int tries = 0; tries < 2; ++tries) {
       for (int x = 0; factory->EnumAdapters1(x, &adapter_p) != DXGI_ERROR_NOT_FOUND; ++x) {
         dxgi::adapter_t adapter_tmp { adapter_p };
 
@@ -384,6 +394,17 @@ namespace platf::dxgi {
         }
       }
 
+      if (output) {
+        break;
+      }
+
+      // If we made it here without finding an output, try to power on the display and retry.
+      if (tries == 0) {
+        SetThreadExecutionState(ES_DISPLAY_REQUIRED);
+        Sleep(500);
+      }
+    }
+
     if (!output) {
       BOOST_LOG(error) << "Failed to locate an output device"sv;
       return -1;