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