text: /*
   *  Copyright 2017 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 <Foundation/Foundation.h>
  
  #import "WebRTC/RTCVideoFrame.h"
  #import "WebRTC/RTCVideoRenderer.h"
  
  // Check if metal is supported in WebRTC.
  // NOTE: Currently arm64 == Metal.
  #if defined(__aarch64__)
  #define RTC_SUPPORTS_METAL
  #endif
  
  NS_ASSUME_NONNULL_BEGIN
  
  /**
   * RTCMTLVideoView is thin wrapper around MTKView.
   *
   * It has id<RTCVideoRenderer> property that renders video frames in the view's
   * bounds using Metal.
   * NOTE: always check if metal is available on the running device via
   * RTC_SUPPORTS_METAL macro before initializing this class.
   */
  NS_CLASS_AVAILABLE_IOS(9)
  
  RTC_EXPORT
  @interface RTCMTLVideoView : UIView<RTCVideoRenderer>
  
  @property(nonatomic, weak) id<RTCVideoViewDelegate> delegate;
  
  @property(nonatomic) UIViewContentMode videoContentMode;
  
  /** @abstract Enables/disables rendering.
   */
  @property(nonatomic, getter=isEnabled) BOOL enabled;
  
  /** @abstract Wrapped RTCVideoRotation, or nil.
   */
  @property(nonatomic, nullable) NSValue* rotationOverride;
  
  @end
  
  NS_ASSUME_NONNULL_END
  