macOS では USB で接続されたカメラも取得する

CHANGES.md

@@ -11,6 +11,10 @@
 
 ## develop
 
+- [FIX] macOS で USB 接続されたカメラが利用できなくなっていた問題を修正する
+  - 2023.15.0 リリース時の WebRTC の更新に伴い、 macOS で USB 接続されたカメラが取得できなくなっていた
+  - @enm10k
+
 ## 2023.15.0 (2023-10-31)
 
 - [UPDATE] WebRTC を m119.6045.2.1 に上げる

src/mac/mac_capturer.mm

@@ -91,9 +91,24 @@ - (void)capturer:(RTCVideoCapturer*)capturer
   return rtc::make_ref_counted<MacCapturer>(c);
 }
 
+NSArray<AVCaptureDevice*>* captureDevices() {
+// macOS では USB で接続されたカメラも取得する
+#if defined(SORA_CPP_SDK_MACOS)
+  // AVCaptureDeviceTypeExternal の利用には macOS 14 以上が必要だが、 GitHub Actions では macOS 14 が利用出来ないため一時的に古い API を使う
+  // AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession
+  // discoverySessionWithDeviceTypes:@[ AVCaptureDeviceTypeBuiltInWideAngleCamera, AVCaptureDeviceTypeExternal ]
+  //                       mediaType:AVMediaTypeVideo
+  //                       position:AVCaptureDevicePositionUnspecified];
+  // return session.devices;
+  return [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+#else
+  return [RTCCameraVideoCapturer captureDevices];
+# endif
+}
+
 bool MacCapturer::EnumVideoDevice(
     std::function<void(std::string, std::string)> f) {
-  NSArray<AVCaptureDevice*>* devices = [RTCCameraVideoCapturer captureDevices];
+  NSArray<AVCaptureDevice*>* devices = captureDevices();
   [devices enumerateObjectsUsingBlock:^(AVCaptureDevice* device, NSUInteger i,
                                         BOOL* stop) {
     f([device.localizedName UTF8String], [device.uniqueID UTF8String]);
@@ -107,7 +122,7 @@ - (void)capturer:(RTCVideoCapturer*)capturer
   // https://www.ffmpeg.org/ffmpeg-devices.html#avfoundation
 
   size_t capture_device_index = SIZE_T_MAX;
-  NSArray<AVCaptureDevice*>* devices = [RTCCameraVideoCapturer captureDevices];
+  NSArray<AVCaptureDevice*>* devices = captureDevices();
   [devices enumerateObjectsUsingBlock:^(AVCaptureDevice* device, NSUInteger i,
                                         BOOL* stop) {
     // 便利なのでデバイスの一覧をログに出力しておく
@@ -149,8 +164,7 @@ - (void)capturer:(RTCVideoCapturer*)capturer
   }
 
   if (capture_device_index != SIZE_T_MAX) {
-    AVCaptureDevice* device = [[RTCCameraVideoCapturer captureDevices]
-        objectAtIndex:capture_device_index];
+    AVCaptureDevice* device = [captureDevices() objectAtIndex:capture_device_index];
     RTC_LOG(LS_INFO) << "selected video device: [" << capture_device_index
                      << "] device_name=" << [device.localizedName UTF8String];
     return device;