Bug unsupported file format 'public.heic'

Sources/LiveKit/Broadcast/Uploader/SampleUploader.swift

@@ -28,6 +28,7 @@ private enum Constants {
 
 class SampleUploader {
     private static var imageContext = CIContext(options: nil)
+    private static var colorSpace = CGColorSpaceCreateDeviceRGB()
 
     @Atomic private var isReady = false
     private var connection: BroadcastUploadSocketConnection
@@ -37,6 +38,9 @@ class SampleUploader {
 
     private let serialQueue: DispatchQueue
 
+    // Configure desired compression quality (0.0 = max compression, 1.0 = least compression)
+    public let compressionQuality: CGFloat = 1.0
+
     init(connection: BroadcastUploadSocketConnection) {
         self.connection = connection
         serialQueue = DispatchQueue(label: "io.livekit.broadcast.sampleUploader")
@@ -115,14 +119,12 @@ private extension SampleUploader {
 
         CVPixelBufferLockBaseAddress(imageBuffer, .readOnly)
 
-        let scaleFactor = 1.0
-        let width = CVPixelBufferGetWidth(imageBuffer) / Int(scaleFactor)
-        let height = CVPixelBufferGetHeight(imageBuffer) / Int(scaleFactor)
+        let width = CVPixelBufferGetWidth(imageBuffer)
+        let height = CVPixelBufferGetHeight(imageBuffer)
 
         let orientation = CMGetAttachment(buffer, key: RPVideoSampleOrientationKey as CFString, attachmentModeOut: nil)?.uintValue ?? 0
 
-        let scaleTransform = CGAffineTransform(scaleX: CGFloat(1.0 / scaleFactor), y: CGFloat(1.0 / scaleFactor))
-        let bufferData = jpegData(from: imageBuffer, scale: scaleTransform)
+        let bufferData = jpegData(from: imageBuffer)
 
         CVPixelBufferUnlockBaseAddress(imageBuffer, .readOnly)
 
@@ -144,16 +146,35 @@ private extension SampleUploader {
         return serializedMessage
     }
 
-    func jpegData(from buffer: CVPixelBuffer, scale scaleTransform: CGAffineTransform) -> Data? {
-        let image = CIImage(cvPixelBuffer: buffer).transformed(by: scaleTransform)
+    func jpegData(from buffer: CVPixelBuffer) -> Data? {
+        let image = CIImage(cvPixelBuffer: buffer)
 
-        guard let colorSpace = image.colorSpace else {
-            return nil
-        }
+        if #available(iOS 17.0, *) {
+            return Self.imageContext.jpegRepresentation(
+                of: image,
+                colorSpace: Self.colorSpace,
+                options: [kCGImageDestinationLossyCompressionQuality as CIImageRepresentationOption: compressionQuality]
+            )
+        } else {
+            // Workaround for "unsupported file format 'public.heic'"
+            guard let cgImage = Self.imageContext.createCGImage(image, from: image.extent) else {
+                return nil
+            }
 
-        let options: [CIImageRepresentationOption: Float] = [kCGImageDestinationLossyCompressionQuality as CIImageRepresentationOption: 1.0]
+            let data = NSMutableData()
+            guard let imageDestination = CGImageDestinationCreateWithData(data, AVFileType.jpg as CFString, 1, nil) else {
+                return nil
+            }
+
+            let options: [CFString: Any] = [kCGImageDestinationLossyCompressionQuality: compressionQuality]
+            CGImageDestinationAddImage(imageDestination, cgImage, options as CFDictionary)
 
-        return SampleUploader.imageContext.jpegRepresentation(of: image, colorSpace: colorSpace, options: options)
+            guard CGImageDestinationFinalize(imageDestination) else {
+                return nil
+            }
+
+            return data as Data
+        }
     }
 }