fix: DeckLink macOS build — CFStringRef and CoreFoundation

GetDisplayName returns CFStringRef on macOS (not const char*).
Add #ifdef __APPLE__ handling in DeckLinkSender.hpp and
DeckLinkReceiver.hpp, and link -framework CoreFoundation in
decklinkin/decklinkout CMakeLists.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nodes/decklinkin/CMakeLists.txt

@@ -8,4 +8,7 @@ add_executable(dmf-node-decklinkin
 target_compile_features(dmf-node-decklinkin PRIVATE cxx_std_20)
 target_include_directories(dmf-node-decklinkin PRIVATE "${DECKLINK_INCLUDE}")
 target_link_libraries(dmf-node-decklinkin PRIVATE dmf-shared ${CMAKE_DL_LIBS})
+if(APPLE)
+    target_link_libraries(dmf-node-decklinkin PRIVATE "-framework CoreFoundation")
+endif()
 install(TARGETS dmf-node-decklinkin RUNTIME DESTINATION bin)

nodes/decklinkout/CMakeLists.txt

@@ -8,4 +8,7 @@ add_executable(dmf-node-decklinkout
 target_compile_features(dmf-node-decklinkout PRIVATE cxx_std_20)
 target_include_directories(dmf-node-decklinkout PRIVATE "${DECKLINK_INCLUDE}")
 target_link_libraries(dmf-node-decklinkout PRIVATE dmf-shared ${CMAKE_DL_LIBS})
+if(APPLE)
+    target_link_libraries(dmf-node-decklinkout PRIVATE "-framework CoreFoundation")
+endif()
 install(TARGETS dmf-node-decklinkout RUNTIME DESTINATION bin)

shared/DeckLinkReceiver.hpp

@@ -11,6 +11,9 @@
 #include <string>
 #include <vector>
 #include <DeckLinkAPI.h>
+#ifdef __APPLE__
+#include <CoreFoundation/CoreFoundation.h>
+#endif
 #include "Signal.hpp"
 
 namespace dmf {
@@ -268,9 +271,20 @@ private:
             IDeckLinkInput* inp = nullptr;
             if (device->QueryInterface(IID_IDeckLinkInput, (void**)&inp) == S_OK) {
                 inp->Release();
-                const char* name = nullptr;
+                std::string name = "?";
-                device->GetDisplayName(&name);
+#ifdef __APPLE__
-                devices.push_back({index, name ? name : "?"});
+                CFStringRef cfName = nullptr;
+                if (device->GetDisplayName(&cfName) == S_OK && cfName) {
+                    char buf[256] = {};
+                    CFStringGetCString(cfName, buf, sizeof(buf), kCFStringEncodingUTF8);
+                    name = buf;
+                    CFRelease(cfName);
+                }
+#else
+                const char* cname = nullptr;
+                if (device->GetDisplayName(&cname) == S_OK && cname) name = cname;
+#endif
+                devices.push_back({index, name});
                 raw_devices.push_back(device);
                 index++;
             } else {

shared/DeckLinkSender.hpp

@@ -10,6 +10,9 @@
 #include <string>
 #include <vector>
 #include <DeckLinkAPI.h>
+#ifdef __APPLE__
+#include <CoreFoundation/CoreFoundation.h>
+#endif
 
 #include "Signal.hpp"
 #include "V210.hpp"
@@ -263,9 +266,20 @@ private:
             IDeckLinkOutput* out = nullptr;
             if (device->QueryInterface(IID_IDeckLinkOutput, (void**)&out) == S_OK) {
                 out->Release();
-                const char* name = nullptr;
+                std::string name = "?";
-                device->GetDisplayName(&name);
+#ifdef __APPLE__
-                devices.push_back({index, name ? name : "?"});
+                CFStringRef cfName = nullptr;
+                if (device->GetDisplayName(&cfName) == S_OK && cfName) {
+                    char buf[256] = {};
+                    CFStringGetCString(cfName, buf, sizeof(buf), kCFStringEncodingUTF8);
+                    name = buf;
+                    CFRelease(cfName);
+                }
+#else
+                const char* cname = nullptr;
+                if (device->GetDisplayName(&cname) == S_OK && cname) name = cname;
+#endif
+                devices.push_back({index, name});
                 raw_devices.push_back(device);
                 index++;
             } else {