Module refactoring

submodules/MediaPlayer/Sources/FFMpegMediaPassthroughVideoFrameDecoder.swift

@@ -0,0 +1,49 @@
+import CoreMedia
+
+final class FFMpegMediaPassthroughVideoFrameDecoder: MediaTrackFrameDecoder {
+    private let videoFormat: CMVideoFormatDescription
+    private let rotationAngle: Double
+    private var resetDecoderOnNextFrame = true
+    
+    init(videoFormat: CMVideoFormatDescription, rotationAngle: Double) {
+        self.videoFormat = videoFormat
+        self.rotationAngle = rotationAngle
+    }
+    
+    func decode(frame: MediaTrackDecodableFrame) -> MediaTrackFrame? {
+        var blockBuffer: CMBlockBuffer?
+        
+        let bytes = malloc(Int(frame.packet.size))!
+        memcpy(bytes, frame.packet.data, Int(frame.packet.size))
+        guard CMBlockBufferCreateWithMemoryBlock(allocator: nil, memoryBlock: bytes, blockLength: Int(frame.packet.size), blockAllocator: nil, customBlockSource: nil, offsetToData: 0, dataLength: Int(frame.packet.size), flags: 0, blockBufferOut: &blockBuffer) == noErr else {
+            free(bytes)
+            return nil
+        }
+        
+        var timingInfo = CMSampleTimingInfo(duration: frame.duration, presentationTimeStamp: frame.pts, decodeTimeStamp: frame.dts)
+        var sampleBuffer: CMSampleBuffer?
+        var sampleSize = Int(frame.packet.size)
+        guard CMSampleBufferCreate(allocator: nil, dataBuffer: blockBuffer, dataReady: true, makeDataReadyCallback: nil, refcon: nil, formatDescription: self.videoFormat, sampleCount: 1, sampleTimingEntryCount: 1, sampleTimingArray: &timingInfo, sampleSizeEntryCount: 1, sampleSizeArray: &sampleSize, sampleBufferOut: &sampleBuffer) == noErr else {
+            return nil
+        }
+        
+        let resetDecoder = self.resetDecoderOnNextFrame
+        if self.resetDecoderOnNextFrame {
+            self.resetDecoderOnNextFrame = false
+            let attachments = CMSampleBufferGetSampleAttachmentsArray(sampleBuffer!, createIfNecessary: true)! as NSArray
+            let dict = attachments[0] as! NSMutableDictionary
+            
+            dict.setValue(kCFBooleanTrue as AnyObject, forKey: kCMSampleBufferAttachmentKey_ResetDecoderBeforeDecoding as NSString as String)
+        }
+        
+        return MediaTrackFrame(type: .video, sampleBuffer: sampleBuffer!, resetDecoder: resetDecoder, decoded: false, rotationAngle: self.rotationAngle)
+    }
+    
+    func takeRemainingFrame() -> MediaTrackFrame? {
+        return nil
+    }
+    
+    func reset() {
+        self.resetDecoderOnNextFrame = true
+    }
+}