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/*
* 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 "RTCCameraPreviewView.h"
#import <AVFoundation/AVFoundation.h>
#import <UIKit/UIKit.h>
#import "RTCDispatcher+Private.h"
@implementation RTC_OBJC_TYPE (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;
}
_captureSession = captureSession;
[RTC_OBJC_TYPE(RTCDispatcher)
dispatchAsyncOnType:RTCDispatcherTypeMain
block:^{
AVCaptureVideoPreviewLayer *previewLayer =
[self previewLayer];
[RTC_OBJC_TYPE(RTCDispatcher)
dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
block:^{
previewLayer.session = captureSession;
[RTC_OBJC_TYPE(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 == UIDeviceOrientationPortraitUpsideDown) {
previewLayer.connection.videoOrientation =
AVCaptureVideoOrientationPortraitUpsideDown;
} else if (deviceOrientation == UIDeviceOrientationLandscapeRight) {
previewLayer.connection.videoOrientation =
AVCaptureVideoOrientationLandscapeRight;
} else if (deviceOrientation == UIDeviceOrientationLandscapeLeft) {
previewLayer.connection.videoOrientation =
AVCaptureVideoOrientationLandscapeLeft;
} else if (deviceOrientation == UIDeviceOrientationPortrait) {
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
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