webrtc/base/objc/RTCCameraPreviewView.m

/*
 *  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.
 */

#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif

#import "webrtc/base/objc/RTCCameraPreviewView.h"

#import <AVFoundation/AVFoundation.h>

#import "webrtc/base/objc/RTCDispatcher.h"

@implementation RTCCameraPreviewView

@synthesize captureSession = _captureSession;

+ (Class)layerClass {
  return [AVCaptureVideoPreviewLayer class];
}

- (void)setCaptureSession:(AVCaptureSession *)captureSession {
  if (_captureSession == captureSession) {
    return;
  }
  _captureSession = captureSession;
  AVCaptureVideoPreviewLayer *previewLayer = [self previewLayer];
  [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
                               block:^{
    previewLayer.session = captureSession;
  }];
}

#pragma mark - Private

- (AVCaptureVideoPreviewLayer *)previewLayer {
  return (AVCaptureVideoPreviewLayer *)self.layer;
}

@end