Implement onDeviceChange method

analysis_options.yaml

@@ -30,7 +30,7 @@ linter:
     - use_rethrow_when_possible
     - valid_regexps
     - void_checks
-  
+
 analyzer:
   errors:
     # treat missing required parameters as a warning (not a hint)

crates/native/Cargo.toml

@@ -12,6 +12,7 @@ anyhow = "1.0"
 cxx = "1.0"
 derive_more = "0.99"
 libwebrtc-sys = { path = "../libwebrtc-sys" }
+winapi = { version = "0.3", features = ["winuser", "dbt"] }
 
 [build-dependencies]
 anyhow = "1.0"

crates/native/include/api.h

@@ -45,10 +45,6 @@ class SetDescriptionCallbackInterface {
 class OnFrameCallbackInterface {
  public:
   // Called when the underlying video engine produces a new video frame.
-  //
-  // The provided frame is a pointer to the `rust::Box<VideoFrame>`. Its
-  // ownership can be transferred back to the Rust side using the
-  // `rust::Box::from_raw()`.
   virtual void OnFrame(VideoFrame) = 0;
 
   virtual ~OnFrameCallbackInterface() = default;
@@ -113,3 +109,12 @@ class AddIceCandidateCallbackInterface {
 
   virtual ~AddIceCandidateCallbackInterface() = default;
 };
+
+// Callback, called whenever a set of available media devices changes.
+class OnDeviceChangeCallback {
+ public:
+  // Called whenever a set of available media devices changes.
+  virtual void OnDeviceChange() = 0;
+
+  virtual ~OnDeviceChangeCallback() = default;
+};