From: Nico Grunbaum <na-g@nostrum.com>
Date: Wed, 15 Nov 2023 22:33:00 +0000
Subject: Bug 1863041 - P0 - add device filter control to
 RTCCameraVideoCapturer;r=pehrsons,webrtc-reviewers

I have filed this bug upstream: https://bugs.chromium.org/p/webrtc/issues/detail?id=15639

Differential Revision: https://phabricator.services.mozilla.com/D193172
Mercurial Revision: https://hg.mozilla.org/mozilla-central/rev/91a763d768b74acc9cf4828f91a86df4a7b092ce
---
 .../capturer/RTCCameraVideoCapturer.h           |  5 ++++-
 .../capturer/RTCCameraVideoCapturer.m           | 17 +++++++++++++++--
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/sdk/objc/components/capturer/RTCCameraVideoCapturer.h b/sdk/objc/components/capturer/RTCCameraVideoCapturer.h
index 370bfa70f0..b1f3f64f74 100644
--- a/sdk/objc/components/capturer/RTCCameraVideoCapturer.h
+++ b/sdk/objc/components/capturer/RTCCameraVideoCapturer.h
@@ -26,7 +26,10 @@ NS_EXTENSION_UNAVAILABLE_IOS("Camera not available in app extensions.")
 @property(readonly, nonatomic) AVCaptureSession *captureSession;
 
 // Returns list of available capture devices that support video capture.
-+ (NSArray<AVCaptureDevice *> *)captureDevices;
++ (NSArray<AVCaptureDevice *> *)captureDevicesWithDeviceTypes:
+    (NSArray<AVCaptureDeviceType> *)deviceTypes;
+// Returns list of default capture devices types
++ (NSArray<AVCaptureDeviceType> *)defaultCaptureDeviceTypes;
 // Returns list of formats that are supported by this class for this device.
 + (NSArray<AVCaptureDeviceFormat *> *)supportedFormatsForDevice:(AVCaptureDevice *)device;
 
diff --git a/sdk/objc/components/capturer/RTCCameraVideoCapturer.m b/sdk/objc/components/capturer/RTCCameraVideoCapturer.m
index e7c47b4e99..1361207faf 100644
--- a/sdk/objc/components/capturer/RTCCameraVideoCapturer.m
+++ b/sdk/objc/components/capturer/RTCCameraVideoCapturer.m
@@ -117,14 +117,27 @@ const int64_t kNanosecondsPerSecond = 1000000000;
   [[NSNotificationCenter defaultCenter] removeObserver:self];
 }
 
-+ (NSArray<AVCaptureDevice *> *)captureDevices {
++ (NSArray<AVCaptureDevice *> *)captureDevicesWithDeviceTypes:
+    (NSArray<AVCaptureDeviceType> *)deviceTypes {
   AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession
-      discoverySessionWithDeviceTypes:@[ AVCaptureDeviceTypeBuiltInWideAngleCamera ]
+      discoverySessionWithDeviceTypes:deviceTypes
                             mediaType:AVMediaTypeVideo
                              position:AVCaptureDevicePositionUnspecified];
   return session.devices;
 }
 
++ (NSArray<AVCaptureDeviceType> *)defaultCaptureDeviceTypes {
+  NSArray *types = @[ AVCaptureDeviceTypeBuiltInWideAngleCamera ];
+#if !defined(WEBRTC_IOS)
+  if (@available(macOS 14.0, *)) {
+    types = [types arrayByAddingObject:AVCaptureDeviceTypeExternal];
+  } else {
+    types = [types arrayByAddingObject:AVCaptureDeviceTypeExternalUnknown];
+  }
+#endif
+  return types;
+}
+
 + (NSArray<AVCaptureDeviceFormat *> *)supportedFormatsForDevice:(AVCaptureDevice *)device {
   // Support opening the device in any format. We make sure it's converted to a format we
   // can handle, if needed, in the method `-setupVideoDataOutput`.