Creating RTMP onMetaData based on input data.

Sources/Codec/AudioCodec.swift

@@ -53,6 +53,9 @@ public class AudioCodec {
             }
         }
     }
+    var outputFormat: AVAudioFormat? {
+        return audioConverter?.outputFormat
+    }
     private var cursor: Int = 0
     private var inputBuffers: [AVAudioBuffer] = []
     private var outputBuffers: [AVAudioBuffer] = []

Sources/Codec/VTSessionMode.swift

@@ -37,7 +37,7 @@ enum VTSessionMode {
             }
             return session
         case .decompression:
-            guard let formatDescription = videoCodec.formatDescription else {
+            guard let formatDescription = videoCodec.outputFormat else {
                 videoCodec.delegate?.videoCodec(videoCodec, errorOccurred: .failedToCreate(status: kVTParameterErr))
                 return nil
             }

Sources/Codec/VideoCodec.swift

@@ -62,12 +62,12 @@ public class VideoCodec {
 
     var lockQueue = DispatchQueue(label: "com.haishinkit.HaishinKit.VideoCodec.lock")
     var expectedFrameRate = IOMixer.defaultFrameRate
-    var formatDescription: CMFormatDescription? {
+    private(set) var outputFormat: CMFormatDescription? {
         didSet {
-            guard !CMFormatDescriptionEqual(formatDescription, otherFormatDescription: oldValue) else {
+            guard !CMFormatDescriptionEqual(outputFormat, otherFormatDescription: oldValue) else {
                 return
             }
-            delegate?.videoCodec(self, didOutput: formatDescription)
+            delegate?.videoCodec(self, didOutput: outputFormat)
         }
     }
     var needsSync: Atomic<Bool> = .init(true)
@@ -108,7 +108,7 @@ public class VideoCodec {
                 delegate?.videoCodec(self, errorOccurred: .failedToFlame(status: status))
                 return
             }
-            formatDescription = sampleBuffer.formatDescription
+            outputFormat = sampleBuffer.formatDescription
             delegate?.videoCodec(self, didOutput: sampleBuffer)
         }
     }
@@ -214,7 +214,7 @@ extension VideoCodec: Running {
             self.session = nil
             self.invalidateSession = true
             self.needsSync.mutate { $0 = true }
-            self.formatDescription = nil
+            self.outputFormat = nil
             #if os(iOS)
             NotificationCenter.default.removeObserver(self, name: AVAudioSession.interruptionNotification, object: nil)
             NotificationCenter.default.removeObserver(self, name: UIApplication.willEnterForegroundNotification, object: nil)

Sources/Media/HKView.swift

@@ -28,11 +28,6 @@ public class HKView: UIView {
         }
     }
 
-    /// A value that displays a video format.
-    public var videoFormatDescription: CMVideoFormatDescription? {
-        currentStream?.mixer.videoIO.formatDescription
-    }
-
     #if !os(tvOS)
     public var videoOrientation: AVCaptureVideoOrientation = .portrait {
         didSet {
@@ -139,11 +134,6 @@ public class HKView: NSView {
         }
     }
 
-    /// A value that displays a video format.
-    public var videoFormatDescription: CMVideoFormatDescription? {
-        currentStream?.mixer.videoIO.formatDescription
-    }
-
     public var videoOrientation: AVCaptureVideoOrientation = .portrait
 
     private var currentSampleBuffer: CMSampleBuffer?

Sources/Media/IOAudioResampler.swift

@@ -76,6 +76,10 @@ final class IOAudioResampler<T: IOAudioResamplerDelegate> {
     }
     weak var delegate: T?
 
+    var inputFormat: AVAudioFormat? {
+        return audioConverter?.inputFormat
+    }
+
     var outputFormat: AVAudioFormat? {
         return audioConverter?.outputFormat
     }

Sources/Media/IOAudioUnit.swift

@@ -5,6 +5,8 @@ import SwiftPMSupport
 #endif
 
 final class IOAudioUnit: NSObject, IOUnit {
+    typealias FormatDescription = CMAudioFormatDescription
+
     lazy var codec: AudioCodec = {
         var codec = AudioCodec()
         codec.lockQueue = lockQueue
@@ -33,6 +35,10 @@ final class IOAudioUnit: NSObject, IOUnit {
             resampler.settings = settings.makeAudioResamplerSettings()
         }
     }
+    var inputFormat: FormatDescription?
+    var outputFormat: FormatDescription? {
+        return codec.outputFormat?.formatDescription
+    }
     private(set) var presentationTimeStamp: CMTime = .invalid
     private lazy var resampler: IOAudioResampler<IOAudioUnit> = {
         var resampler = IOAudioResampler<IOAudioUnit>()
@@ -65,6 +71,7 @@ final class IOAudioUnit: NSObject, IOUnit {
         guard let device else {
             try capture.attachDevice(nil, audioUnit: self)
             presentationTimeStamp = .invalid
+            inputFormat = nil
             return
         }
         try capture.attachDevice(device, audioUnit: self)
@@ -152,6 +159,7 @@ extension IOAudioUnit: IOAudioResamplerDelegate {
     }
 
     func resampler(_ resampler: IOAudioResampler<IOAudioUnit>, didOutput audioFormat: AVAudioFormat) {
+        inputFormat = resampler.inputFormat?.formatDescription
         codec.inSourceFormat = audioFormat.formatDescription.audioStreamBasicDescription
         monitor.inSourceFormat = audioFormat.formatDescription.audioStreamBasicDescription
     }

Sources/Media/IOMixer.swift

@@ -222,7 +222,6 @@ public final class IOMixer {
             case kCMMediaType_Audio:
                 audioIO.codec.appendSampleBuffer(sampleBuffer)
             case kCMMediaType_Video:
-                videoIO.codec.formatDescription = sampleBuffer.formatDescription
                 videoIO.codec.appendSampleBuffer(sampleBuffer)
             default:
                 break

Sources/Media/IOUnit.swift

@@ -5,8 +5,12 @@ import Foundation
 public typealias AVCodecDelegate = AudioCodecDelegate & VideoCodecDelegate
 
 protocol IOUnit {
+    associatedtype FormatDescription
+
     var mixer: IOMixer? { get set }
     var muted: Bool { get set }
+    var inputFormat: FormatDescription? { get }
+    var outputFormat: FormatDescription? { get }
 
     func appendSampleBuffer(_ sampleBuffer: CMSampleBuffer)
 }

Sources/Media/IOVideoUnit.swift

@@ -2,6 +2,8 @@ import AVFoundation
 import CoreImage
 
 final class IOVideoUnit: NSObject, IOUnit {
+    typealias FormatDescription = CMVideoFormatDescription
+
     enum Error: Swift.Error {
         case multiCamNotSupported
     }
@@ -12,61 +14,28 @@ final class IOVideoUnit: NSObject, IOUnit {
     ]
 
     let lockQueue = DispatchQueue(label: "com.haishinkit.HaishinKit.VideoIOComponent.lock")
-
     var context: CIContext = .init() {
         didSet {
             for effect in effects {
                 effect.ciContext = context
             }
         }
     }
-
     weak var drawable: (any NetStreamDrawable)? {
         didSet {
             #if os(iOS) || os(macOS)
             drawable?.videoOrientation = videoOrientation
             #endif
         }
     }
-
-    var formatDescription: CMVideoFormatDescription? {
-        didSet {
-            codec.formatDescription = formatDescription
-        }
-    }
-
+    var multiCamCaptureSettings: MultiCamCaptureSettings = .default
     lazy var codec: VideoCodec = {
         var codec = VideoCodec()
         codec.lockQueue = lockQueue
         return codec
     }()
-
     weak var mixer: IOMixer?
-
     var muted = false
-
-    private(set) var presentationTimeStamp: CMTime = .invalid
-    private(set) var effects: Set<VideoEffect> = []
-
-    private var extent = CGRect.zero {
-        didSet {
-            guard extent != oldValue else {
-                return
-            }
-            CVPixelBufferPoolCreate(nil, nil, attributes as CFDictionary?, &pixelBufferPool)
-            pixelBufferPool?.createPixelBuffer(&pixelBuffer)
-        }
-    }
-
-    private var attributes: [NSString: NSObject] {
-        var attributes: [NSString: NSObject] = Self.defaultAttributes
-        attributes[kCVPixelBufferWidthKey] = NSNumber(value: Int(extent.width))
-        attributes[kCVPixelBufferHeightKey] = NSNumber(value: Int(extent.height))
-        return attributes
-    }
-
-    private var pixelBufferPool: CVPixelBufferPool?
-
     var frameRate = IOMixer.defaultFrameRate {
         didSet {
             if #available(tvOS 17.0, *) {
@@ -75,7 +44,6 @@ final class IOVideoUnit: NSObject, IOUnit {
             }
         }
     }
-
     #if !os(tvOS)
     var videoOrientation: AVCaptureVideoOrientation = .portrait {
         didSet {
@@ -98,7 +66,6 @@ final class IOVideoUnit: NSObject, IOUnit {
         }
     }
     #endif
-
     var torch = false {
         didSet {
             guard torch != oldValue else {
@@ -109,7 +76,10 @@ final class IOVideoUnit: NSObject, IOUnit {
             }
         }
     }
-
+    var inputFormat: FormatDescription?
+    var outputFormat: FormatDescription? {
+        codec.outputFormat
+    }
     #if os(tvOS)
     private var _capture: Any?
     @available(tvOS 17.0, *)
@@ -132,10 +102,25 @@ final class IOVideoUnit: NSObject, IOUnit {
     private(set) var capture: IOVideoCaptureUnit = .init()
     private(set) var multiCamCapture: IOVideoCaptureUnit = .init()
     #endif
-
-    var multiCamCaptureSettings: MultiCamCaptureSettings = .default
-
+    private(set) var presentationTimeStamp: CMTime = .invalid
+    private(set) var effects: Set<VideoEffect> = []
+    private var extent = CGRect.zero {
+        didSet {
+            guard extent != oldValue else {
+                return
+            }
+            CVPixelBufferPoolCreate(nil, nil, attributes as CFDictionary?, &pixelBufferPool)
+            pixelBufferPool?.createPixelBuffer(&pixelBuffer)
+        }
+    }
+    private var attributes: [NSString: NSObject] {
+        var attributes: [NSString: NSObject] = Self.defaultAttributes
+        attributes[kCVPixelBufferWidthKey] = NSNumber(value: Int(extent.width))
+        attributes[kCVPixelBufferHeightKey] = NSNumber(value: Int(extent.height))
+        return attributes
+    }
     private var pixelBuffer: CVPixelBuffer?
+    private var pixelBufferPool: CVPixelBufferPool?
     private var multiCamSampleBuffer: CMSampleBuffer?
 
     deinit {
@@ -161,6 +146,7 @@ final class IOVideoUnit: NSObject, IOUnit {
             capture.detachSession(mixer.session)
             try capture.attachDevice(nil, videoUnit: self)
             presentationTimeStamp = .invalid
+            inputFormat = nil
             return
         }
         mixer.session.beginConfiguration()
@@ -248,6 +234,7 @@ final class IOVideoUnit: NSObject, IOUnit {
     }
 
     func appendSampleBuffer(_ sampleBuffer: CMSampleBuffer) {
+        inputFormat = sampleBuffer.formatDescription
         guard let buffer = sampleBuffer.imageBuffer else {
             return
         }

Sources/Media/MTHKView.swift

@@ -9,10 +9,6 @@ public class MTHKView: MTKView {
     /// Specifies how the video is displayed within a player layer’s bounds.
     public var videoGravity: AVLayerVideoGravity = .resizeAspect
 
-    public var videoFormatDescription: CMVideoFormatDescription? {
-        currentStream?.mixer.videoIO.formatDescription
-    }
-
     #if !os(tvOS)
     public var videoOrientation: AVCaptureVideoOrientation = .portrait
     #endif

Sources/Media/PiPHKView.swift

@@ -25,11 +25,6 @@ public class PiPHKView: UIView {
         }
     }
 
-    /// A value that displays a video format.
-    public var videoFormatDescription: CMVideoFormatDescription? {
-        currentStream?.mixer.videoIO.formatDescription
-    }
-
     #if !os(tvOS)
     public var videoOrientation: AVCaptureVideoOrientation = .portrait {
         didSet {
@@ -119,11 +114,6 @@ public class PiPHKView: NSView {
         }
     }
 
-    /// A value that displays a video format.
-    public var videoFormatDescription: CMVideoFormatDescription? {
-        currentStream?.mixer.videoIO.formatDescription
-    }
-
     public var videoOrientation: AVCaptureVideoOrientation = .portrait {
         didSet {
             if Thread.isMainThread {

Sources/Net/NetStreamDrawable.swift

@@ -8,9 +8,6 @@ public protocol NetStreamDrawable: AnyObject {
     var videoOrientation: AVCaptureVideoOrientation { get set }
     #endif
 
-    /// The videoFormatDescription which is the current CMSampleBuffer.
-    var videoFormatDescription: CMVideoFormatDescription? { get }
-
     /// Attaches a drawable to a new NetStream object.
     func attachStream(_ stream: NetStream?)
 

Sources/RTMP/RTMPMessage.swift

@@ -709,7 +709,7 @@ final class RTMPVideoMessage: RTMPMessage {
                 dataReady: true,
                 makeDataReadyCallback: nil,
                 refcon: nil,
-                formatDescription: stream.mixer.videoIO.formatDescription,
+                formatDescription: stream.mixer.videoIO.inputFormat,
                 sampleCount: 1,
                 sampleTimingEntryCount: 1,
                 sampleTimingArray: &timing,
@@ -728,11 +728,11 @@ final class RTMPVideoMessage: RTMPMessage {
         case .h264:
             var config = AVCDecoderConfigurationRecord()
             config.data = payload.subdata(in: FLVTagType.video.headerSize..<payload.count)
-            status = config.makeFormatDescription(&stream.mixer.videoIO.formatDescription)
+            status = config.makeFormatDescription(&stream.mixer.videoIO.inputFormat)
         case .hevc:
             var config = HEVCDecoderConfigurationRecord()
             config.data = payload.subdata(in: FLVTagType.video.headerSize..<payload.count)
-            status = config.makeFormatDescription(&stream.mixer.videoIO.formatDescription)
+            status = config.makeFormatDescription(&stream.mixer.videoIO.inputFormat)
         }
         if status == noErr {
             stream.mixer.mediaLink.hasVideo = true

Sources/RTMP/RTMPStream.swift

@@ -413,24 +413,24 @@ open class RTMPStream: NetStream {
     /// Creates flv metadata for a stream.
     open func makeMetaData() -> ASObject {
         var metadata: [String: Any] = [:]
-        #if os(iOS) || os(macOS)
-        if mixer.videoIO.capture.device != nil {
-            metadata["width"] = mixer.videoIO.codec.settings.videoSize.width
-            metadata["height"] = mixer.videoIO.codec.settings.videoSize.height
-            metadata["framerate"] = mixer.videoIO.frameRate
-            switch mixer.videoIO.codec.settings.format {
+        if mixer.videoIO.inputFormat != nil {
+            metadata["width"] = videoSettings.videoSize.width
+            metadata["height"] = videoSettings.videoSize.height
+            metadata["framerate"] = frameRate
+            switch videoSettings.format {
             case .h264:
                 metadata["videocodecid"] = FLVVideoCodec.avc.rawValue
             case .hevc:
                 metadata["videocodecid"] = FLVVideoFourCC.hevc.rawValue
             }
-            metadata["videodatarate"] = mixer.videoIO.codec.settings.bitRate / 1000
+            metadata["videodatarate"] = videoSettings.bitRate / 1000
         }
-        #endif
-        if let inSourceFormat = mixer.audioIO.codec.inSourceFormat {
+        if mixer.audioIO.inputFormat != nil {
             metadata["audiocodecid"] = FLVAudioCodec.aac.rawValue
             metadata["audiodatarate"] = audioSettings.bitRate / 1000
-            metadata["audiosamplerate"] = inSourceFormat.mSampleRate
+            if let outputFormat = mixer.audioIO.outputFormat?.audioStreamBasicDescription {
+                metadata["audiosamplerate"] = outputFormat.mSampleRate
+            }
         }
         return metadata
     }