Merge pull request #1332 from shogo4405/feature/color-format

IOVideoCaptureUnit#colorFormat property

Author: shogo4405

Sources/Media/IOVideoCaptureUnit.swift

@@ -5,16 +5,23 @@ import Foundation
 /// An object that provides the interface to control the AVCaptureDevice's transport behavior.
 @available(tvOS 17.0, *)
 public class IOVideoCaptureUnit: IOCaptureUnit {
-    /// The default videoSettings for a device.
-    public static let defaultVideoSettings: [NSString: AnyObject] = [
-        kCVPixelBufferPixelFormatTypeKey: NSNumber(value: kCVPixelFormatType_32BGRA)
-    ]
+    #if os(iOS) || os(macOS)
+    /// The default color format.
+    public static let colorFormat = kCVPixelFormatType_32BGRA
+    #else
+    /// The default color format.
+    public static let colorFormat = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange
+    #endif
 
     typealias Output = AVCaptureVideoDataOutput
 
     /// The current video device object.
     public private(set) var device: AVCaptureDevice?
 
+    /// Specifies the video capture color format.
+    /// - Warning: If a format other than kCVPixelFormatType_32BGRA is set, the multi-camera feature will become unavailable. We intend to support this in the future.
+    public var colorFormat = IOVideoCaptureUnit.colorFormat
+
     #if os(iOS) || os(macOS)
     /// Specifies the videoOrientation indicates whether to rotate the video flowing through the connection to a given orientation.
     public var videoOrientation: AVCaptureVideoOrientation = .portrait {
@@ -53,15 +60,11 @@ public class IOVideoCaptureUnit: IOCaptureUnit {
                 return
             }
             output.alwaysDiscardsLateVideoFrames = true
-            #if os(iOS) || os(macOS)
-            if output.availableVideoPixelFormatTypes.contains(kCVPixelFormatType_32BGRA) {
-                output.videoSettings = IOVideoCaptureUnit.defaultVideoSettings as [String: Any]
-            }
-            #elseif os(tvOS)
-            if output.availableVideoPixelFormatTypes.contains(kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange) {
-                output.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String: NSNumber(value: kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange)]
+            if output.availableVideoPixelFormatTypes.contains(colorFormat) {
+                output.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String: NSNumber(value: colorFormat)]
+            } else {
+                logger.warn("device doesn't support this color format ", colorFormat, ".")
             }
-            #endif
         }
     }
     var connection: AVCaptureConnection?