webrtc/sdk/objc/helpers/RTCCameraPreviewView.m
Anders Carlsson 7bca8ca4e2 Obj-C SDK Cleanup
This CL separates the files under sdk/objc into logical directories, replacing
the previous file layout under Framework/.

A long term goal is to have some system set up to generate the files under
sdk/objc/api (the PeerConnection API wrappers) from the C++ code. In the shorter
term the goal is to abstract out shared concepts from these classes in order to
make them as uniform as possible.

The separation into base/, components/, and helpers/ are to differentiate between
the base layer's common protocols, various utilities and the actual platform
specific components.

The old directory layout that resembled a framework's internal layout is not
necessary, since it is generated by the framework target when building it.

Bug: webrtc:9627
Change-Id: Ib084fd83f050ae980649ca99e841f4fb0580bd8f
Reviewed-on: https://webrtc-review.googlesource.com/94142
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24493}
2018-08-30 10:42:41 +00:00

120 lines
3.8 KiB
Objective-C

/*
* 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 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