react-native-vision-camera/package/ios/Extensions/AVCaptureOutput+mirror.swift

60 lines
2.0 KiB
Swift
Raw Permalink Normal View History

//
// AVCaptureOutput+mirror.swift
// mrousavy
//
// Created by Marc Rousavy on 18.01.21.
// Copyright © 2021 mrousavy. All rights reserved.
//
import AVFoundation
extension AVCaptureOutput {
/**
Mirrors the video output if possible.
*/
func mirror() {
for connection in connections {
if connection.isVideoMirroringSupported {
connection.automaticallyAdjustsVideoMirroring = false
connection.isVideoMirrored = true
}
}
}
/**
Sets the target orientation of the video output.
This does not always physically rotate image buffers.
- For Preview, an orientation hint is used to rotate the layer/view itself.
- For Photos, an EXIF tag is used.
- For Videos, the buffers are physically rotated if available, since we use an AVCaptureVideoDataOutput instead of an AVCaptureMovieFileOutput.
*/
func setOrientation(_ orientation: Orientation) {
// Set orientation for each connection
for connection in connections {
#if swift(>=5.9)
if #available(iOS 17.0, *) {
// Camera Sensors are always in landscape rotation (90deg).
// We are setting the target rotation here, so we need to rotate by landscape once.
let cameraOrientation = orientation.rotateBy(orientation: .landscapeLeft)
let degrees = cameraOrientation.toDegrees()
// TODO: Don't rotate the video output because it adds overhead. Instead just use EXIF flags for the .mp4 file if recording.
// Does that work when we flip the camera?
if connection.isVideoRotationAngleSupported(degrees) {
connection.videoRotationAngle = degrees
}
} else {
if connection.isVideoOrientationSupported {
connection.videoOrientation = orientation.toAVCaptureVideoOrientation()
}
}
#else
if connection.isVideoOrientationSupported {
connection.videoOrientation = orientation.toAVCaptureVideoOrientation()
}
#endif
}
}
}