306 lines
12 KiB
Swift
306 lines
12 KiB
Swift
//
|
|
// CameraView+RecordVideo.swift
|
|
// mrousavy
|
|
//
|
|
// Created by Marc Rousavy on 16.12.20.
|
|
// Copyright © 2020 mrousavy. All rights reserved.
|
|
//
|
|
|
|
import AVFoundation
|
|
|
|
// MARK: - CameraView + AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate
|
|
|
|
extension CameraView: AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate {
|
|
/**
|
|
Starts a video + audio recording with a custom Asset Writer.
|
|
*/
|
|
func startRecording(options: NSDictionary, callback jsCallbackFunc: @escaping RCTResponseSenderBlock) {
|
|
cameraQueue.async {
|
|
ReactLogger.log(level: .info, message: "Starting Video recording...")
|
|
let callback = Callback(jsCallbackFunc)
|
|
|
|
var fileType = AVFileType.mov
|
|
if let fileTypeOption = options["fileType"] as? String {
|
|
guard let parsed = try? AVFileType(withString: fileTypeOption) else {
|
|
callback.reject(error: .parameter(.invalid(unionName: "fileType", receivedValue: fileTypeOption)))
|
|
return
|
|
}
|
|
fileType = parsed
|
|
}
|
|
|
|
let errorPointer = ErrorPointer(nilLiteral: ())
|
|
let fileExtension = fileType.descriptor ?? "mov"
|
|
guard let tempFilePath = RCTTempFilePath(fileExtension, errorPointer) else {
|
|
callback.reject(error: .capture(.createTempFileError), cause: errorPointer?.pointee)
|
|
return
|
|
}
|
|
|
|
ReactLogger.log(level: .info, message: "File path: \(tempFilePath)")
|
|
let tempURL = URL(string: "file://\(tempFilePath)")!
|
|
|
|
if let flashMode = options["flash"] as? String {
|
|
// use the torch as the video's flash
|
|
self.setTorchMode(flashMode)
|
|
}
|
|
|
|
guard let videoOutput = self.videoOutput else {
|
|
if self.video?.boolValue == true {
|
|
callback.reject(error: .session(.cameraNotReady))
|
|
return
|
|
} else {
|
|
callback.reject(error: .capture(.videoNotEnabled))
|
|
return
|
|
}
|
|
}
|
|
guard let videoInput = self.videoDeviceInput else {
|
|
callback.reject(error: .session(.cameraNotReady))
|
|
return
|
|
}
|
|
|
|
// TODO: The startRecording() func cannot be async because RN doesn't allow
|
|
// both a callback and a Promise in a single function. Wait for TurboModules?
|
|
// This means that any errors that occur in this function have to be delegated through
|
|
// the callback, but I'd prefer for them to throw for the original function instead.
|
|
|
|
let enableAudio = self.audio?.boolValue == true
|
|
|
|
let onFinish = { (recordingSession: RecordingSession, status: AVAssetWriter.Status, error: Error?) in
|
|
defer {
|
|
if enableAudio {
|
|
self.audioQueue.async {
|
|
self.deactivateAudioSession()
|
|
}
|
|
}
|
|
if options["flash"] != nil {
|
|
// Set torch mode back to what it was before if we used it for the video flash.
|
|
self.setTorchMode(self.torch)
|
|
}
|
|
}
|
|
|
|
self.recordingSession = nil
|
|
self.isRecording = false
|
|
ReactLogger.log(level: .info, message: "RecordingSession finished with status \(status.descriptor).")
|
|
|
|
if let error = error as NSError? {
|
|
if error.domain == "capture/aborted" {
|
|
callback.reject(error: .capture(.aborted), cause: error)
|
|
} else {
|
|
callback.reject(error: .capture(.unknown(message: "An unknown recording error occured! \(error.description)")), cause: error)
|
|
}
|
|
} else {
|
|
if status == .completed {
|
|
callback.resolve([
|
|
"path": recordingSession.url.absoluteString,
|
|
"duration": recordingSession.duration,
|
|
])
|
|
} else {
|
|
callback.reject(error: .unknown(message: "AVAssetWriter completed with status: \(status.descriptor)"))
|
|
}
|
|
}
|
|
}
|
|
|
|
let recordingSession: RecordingSession
|
|
do {
|
|
recordingSession = try RecordingSession(url: tempURL,
|
|
fileType: fileType,
|
|
completion: onFinish)
|
|
} catch let error as NSError {
|
|
callback.reject(error: .capture(.createRecorderError(message: nil)), cause: error)
|
|
return
|
|
}
|
|
self.recordingSession = recordingSession
|
|
|
|
var videoCodec: AVVideoCodecType?
|
|
if let codecString = options["videoCodec"] as? String {
|
|
videoCodec = AVVideoCodecType(withString: codecString)
|
|
}
|
|
|
|
// Init Video
|
|
guard let videoSettings = self.recommendedVideoSettings(videoOutput: videoOutput, fileType: fileType, videoCodec: videoCodec),
|
|
!videoSettings.isEmpty else {
|
|
callback.reject(error: .capture(.createRecorderError(message: "Failed to get video settings!")))
|
|
return
|
|
}
|
|
|
|
// get pixel format (420f, 420v, x420)
|
|
let pixelFormat = CMFormatDescriptionGetMediaSubType(videoInput.device.activeFormat.formatDescription)
|
|
recordingSession.initializeVideoWriter(withSettings: videoSettings,
|
|
pixelFormat: pixelFormat)
|
|
|
|
// Init Audio (optional, async)
|
|
if enableAudio {
|
|
// Activate Audio Session (blocking)
|
|
self.activateAudioSession()
|
|
|
|
if let audioOutput = self.audioOutput,
|
|
let audioSettings = audioOutput.recommendedAudioSettingsForAssetWriter(writingTo: fileType) {
|
|
recordingSession.initializeAudioWriter(withSettings: audioSettings)
|
|
}
|
|
}
|
|
|
|
// start recording session with or without audio.
|
|
do {
|
|
try recordingSession.startAssetWriter()
|
|
} catch let error as NSError {
|
|
callback.reject(error: .capture(.createRecorderError(message: "RecordingSession failed to start asset writer.")), cause: error)
|
|
return
|
|
}
|
|
self.isRecording = true
|
|
}
|
|
}
|
|
|
|
func stopRecording(promise: Promise) {
|
|
cameraQueue.async {
|
|
self.isRecording = false
|
|
|
|
withPromise(promise) {
|
|
guard let recordingSession = self.recordingSession else {
|
|
throw CameraError.capture(.noRecordingInProgress)
|
|
}
|
|
recordingSession.finish()
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
func pauseRecording(promise: Promise) {
|
|
cameraQueue.async {
|
|
withPromise(promise) {
|
|
guard self.recordingSession != nil else {
|
|
// there's no active recording!
|
|
throw CameraError.capture(.noRecordingInProgress)
|
|
}
|
|
self.isRecording = false
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
func resumeRecording(promise: Promise) {
|
|
cameraQueue.async {
|
|
withPromise(promise) {
|
|
guard self.recordingSession != nil else {
|
|
// there's no active recording!
|
|
throw CameraError.capture(.noRecordingInProgress)
|
|
}
|
|
self.isRecording = true
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
public final func captureOutput(_ captureOutput: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from _: AVCaptureConnection) {
|
|
// Video Recording runs in the same queue
|
|
if isRecording {
|
|
guard let recordingSession = recordingSession else {
|
|
invokeOnError(.capture(.unknown(message: "isRecording was true but the RecordingSession was null!")))
|
|
return
|
|
}
|
|
|
|
switch captureOutput {
|
|
case is AVCaptureVideoDataOutput:
|
|
recordingSession.appendBuffer(sampleBuffer, type: .video, timestamp: CMSampleBufferGetPresentationTimeStamp(sampleBuffer))
|
|
case is AVCaptureAudioDataOutput:
|
|
let timestamp = CMSyncConvertTime(CMSampleBufferGetPresentationTimeStamp(sampleBuffer),
|
|
from: audioCaptureSession.masterClock ?? CMClockGetHostTimeClock(),
|
|
to: captureSession.masterClock ?? CMClockGetHostTimeClock())
|
|
recordingSession.appendBuffer(sampleBuffer, type: .audio, timestamp: timestamp)
|
|
default:
|
|
break
|
|
}
|
|
}
|
|
|
|
if let frameProcessor = frameProcessorCallback, captureOutput is AVCaptureVideoDataOutput {
|
|
// check if last frame was x nanoseconds ago, effectively throttling FPS
|
|
let frameTime = UInt64(CMSampleBufferGetPresentationTimeStamp(sampleBuffer).seconds * 1_000_000_000.0)
|
|
let lastFrameProcessorCallElapsedTime = frameTime - lastFrameProcessorCall
|
|
let secondsPerFrame = 1.0 / actualFrameProcessorFps
|
|
let nanosecondsPerFrame = secondsPerFrame * 1_000_000_000.0
|
|
if lastFrameProcessorCallElapsedTime >= UInt64(nanosecondsPerFrame) {
|
|
if !isRunningFrameProcessor {
|
|
// we're not in the middle of executing the Frame Processor, so prepare for next call.
|
|
CameraQueues.frameProcessorQueue.async {
|
|
self.isRunningFrameProcessor = true
|
|
|
|
let perfSample = self.frameProcessorPerformanceDataCollector.beginPerformanceSampleCollection()
|
|
let frame = Frame(buffer: sampleBuffer, orientation: self.bufferOrientation)
|
|
frameProcessor(frame)
|
|
perfSample.endPerformanceSampleCollection()
|
|
|
|
self.isRunningFrameProcessor = false
|
|
}
|
|
lastFrameProcessorCall = frameTime
|
|
} else {
|
|
// we're still in the middle of executing a Frame Processor for a previous frame, so a frame was dropped.
|
|
ReactLogger.log(level: .warning, message: "The Frame Processor took so long to execute that a frame was dropped.")
|
|
}
|
|
}
|
|
|
|
if isReadyForNewEvaluation {
|
|
// last evaluation was more than 1sec ago, evaluate again
|
|
evaluateNewPerformanceSamples()
|
|
}
|
|
}
|
|
}
|
|
|
|
private func evaluateNewPerformanceSamples() {
|
|
lastFrameProcessorPerformanceEvaluation = DispatchTime.now()
|
|
guard let videoDevice = videoDeviceInput?.device else { return }
|
|
guard frameProcessorPerformanceDataCollector.hasEnoughData else { return }
|
|
|
|
let maxFrameProcessorFps = Double(videoDevice.activeVideoMinFrameDuration.timescale) * Double(videoDevice.activeVideoMinFrameDuration.value)
|
|
let averageFps = 1.0 / frameProcessorPerformanceDataCollector.averageExecutionTimeSeconds
|
|
let suggestedFrameProcessorFps = max(floor(min(averageFps, maxFrameProcessorFps)), 1)
|
|
|
|
if frameProcessorFps.intValue == -1 {
|
|
// frameProcessorFps="auto"
|
|
actualFrameProcessorFps = suggestedFrameProcessorFps
|
|
} else {
|
|
// frameProcessorFps={someCustomFpsValue}
|
|
invokeOnFrameProcessorPerformanceSuggestionAvailable(currentFps: frameProcessorFps.doubleValue,
|
|
suggestedFps: suggestedFrameProcessorFps)
|
|
}
|
|
}
|
|
|
|
private func recommendedVideoSettings(videoOutput: AVCaptureVideoDataOutput, fileType: AVFileType, videoCodec: AVVideoCodecType?) -> [String: Any]? {
|
|
if videoCodec != nil {
|
|
return videoOutput.recommendedVideoSettings(forVideoCodecType: videoCodec!, assetWriterOutputFileType: fileType)
|
|
} else {
|
|
return videoOutput.recommendedVideoSettingsForAssetWriter(writingTo: fileType)
|
|
}
|
|
}
|
|
|
|
private var isReadyForNewEvaluation: Bool {
|
|
let lastPerformanceEvaluationElapsedTime = DispatchTime.now().uptimeNanoseconds - lastFrameProcessorPerformanceEvaluation.uptimeNanoseconds
|
|
return lastPerformanceEvaluationElapsedTime > 1_000_000_000
|
|
}
|
|
|
|
/**
|
|
Gets the orientation of the CameraView's images (CMSampleBuffers).
|
|
*/
|
|
var bufferOrientation: UIImage.Orientation {
|
|
guard let cameraPosition = videoDeviceInput?.device.position else {
|
|
return .up
|
|
}
|
|
|
|
switch UIDevice.current.orientation {
|
|
case .portrait:
|
|
return cameraPosition == .front ? .leftMirrored : .right
|
|
|
|
case .landscapeLeft:
|
|
return cameraPosition == .front ? .downMirrored : .up
|
|
|
|
case .portraitUpsideDown:
|
|
return cameraPosition == .front ? .rightMirrored : .left
|
|
|
|
case .landscapeRight:
|
|
return cameraPosition == .front ? .upMirrored : .down
|
|
|
|
case .unknown, .faceUp, .faceDown:
|
|
fallthrough
|
|
@unknown default:
|
|
return .up
|
|
}
|
|
}
|
|
}
|