| /* |
| * Copyright 2015 The WebRTC Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #import "WebRTC/RTCCameraPreviewView.h" |
| |
| #import <AVFoundation/AVFoundation.h> |
| #import <UIKit/UIKit.h> |
| |
| #import "RTCDispatcher+Private.h" |
| |
| @implementation RTCCameraPreviewView |
| |
| @synthesize captureSession = _captureSession; |
| |
| + (Class)layerClass { |
| return [AVCaptureVideoPreviewLayer class]; |
| } |
| |
| - (instancetype)initWithFrame:(CGRect)aRect { |
| self = [super initWithFrame:aRect]; |
| if (self) { |
| [self addOrientationObserver]; |
| } |
| return self; |
| } |
| |
| - (instancetype)initWithCoder:(NSCoder*)aDecoder { |
| self = [super initWithCoder:aDecoder]; |
| if (self) { |
| [self addOrientationObserver]; |
| } |
| return self; |
| } |
| |
| - (void)dealloc { |
| [self removeOrientationObserver]; |
| } |
| |
| - (void)setCaptureSession:(AVCaptureSession *)captureSession { |
| if (_captureSession == captureSession) { |
| return; |
| } |
| [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeMain |
| block:^{ |
| _captureSession = captureSession; |
| AVCaptureVideoPreviewLayer *previewLayer = [self previewLayer]; |
| [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession |
| block:^{ |
| previewLayer.session = captureSession; |
| [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeMain |
| block:^{ |
| [self setCorrectVideoOrientation]; |
| }]; |
| }]; |
| }]; |
| } |
| |
| - (void)layoutSubviews { |
| [super layoutSubviews]; |
| |
| // Update the video orientation based on the device orientation. |
| [self setCorrectVideoOrientation]; |
| } |
| |
| -(void)orientationChanged:(NSNotification *)notification { |
| [self setCorrectVideoOrientation]; |
| } |
| |
| - (void)setCorrectVideoOrientation { |
| // Get current device orientation. |
| UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation; |
| AVCaptureVideoPreviewLayer *previewLayer = [self previewLayer]; |
| |
| // First check if we are allowed to set the video orientation. |
| if (previewLayer.connection.isVideoOrientationSupported) { |
| // Set the video orientation based on device orientation. |
| if (deviceOrientation == UIInterfaceOrientationPortraitUpsideDown) { |
| previewLayer.connection.videoOrientation = |
| AVCaptureVideoOrientationPortraitUpsideDown; |
| } else if (deviceOrientation == UIInterfaceOrientationLandscapeRight) { |
| previewLayer.connection.videoOrientation = |
| AVCaptureVideoOrientationLandscapeRight; |
| } else if (deviceOrientation == UIInterfaceOrientationLandscapeLeft) { |
| previewLayer.connection.videoOrientation = |
| AVCaptureVideoOrientationLandscapeLeft; |
| } else if (deviceOrientation == UIInterfaceOrientationPortrait) { |
| previewLayer.connection.videoOrientation = |
| AVCaptureVideoOrientationPortrait; |
| } |
| // If device orientation switches to FaceUp or FaceDown, don't change video orientation. |
| } |
| } |
| |
| #pragma mark - Private |
| |
| - (void)addOrientationObserver { |
| [[NSNotificationCenter defaultCenter] addObserver:self |
| selector:@selector(orientationChanged:) |
| name:UIDeviceOrientationDidChangeNotification |
| object:nil]; |
| } |
| |
| - (void)removeOrientationObserver { |
| [[NSNotificationCenter defaultCenter] removeObserver:self |
| name:UIDeviceOrientationDidChangeNotification |
| object:nil]; |
| } |
| |
| - (AVCaptureVideoPreviewLayer *)previewLayer { |
| return (AVCaptureVideoPreviewLayer *)self.layer; |
| } |
| |
| @end |