ObjC EncodedImage: Use fixed width integer types

webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCEncodedImage.mm

 /*
  *  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 "WebRTC/RTCVideoCodec.h"
 
 #import "RTCVideoCodec+Private.h"
 
+#include "webrtc/rtc_base/safe_conversions.h"
+
 @implementation RTCEncodedImage
 
 @synthesize buffer = _buffer;
 @synthesize encodedWidth = _encodedWidth;
 @synthesize encodedHeight = _encodedHeight;
 @synthesize timeStamp = _timeStamp;
 @synthesize captureTimeMs = _captureTimeMs;
 @synthesize ntpTimeMs = _ntpTimeMs;
 @synthesize flags = _flags;
 @synthesize encodeStartMs = _encodeStartMs;
 @synthesize encodeFinishMs = _encodeFinishMs;
 @synthesize frameType = _frameType;
 @synthesize rotation = _rotation;
 @synthesize completeFrame = _completeFrame;
 @synthesize qp = _qp;
 @synthesize contentType = _contentType;
 
 - (instancetype)initWithNativeEncodedImage:(webrtc::EncodedImage)encodedImage {
   if (self = [super init]) {
     // Wrap the buffer in NSData without copying, do not take ownership.
     _buffer = [NSData dataWithBytesNoCopy:encodedImage._buffer
                                    length:encodedImage._length
                              freeWhenDone:NO];
-    _encodedWidth = encodedImage._encodedWidth;
-    _encodedHeight = encodedImage._encodedHeight;
+    _encodedWidth = rtc::dchecked_cast<int32_t>(encodedImage._encodedWidth);
+    _encodedHeight = rtc::dchecked_cast<int32_t>(encodedImage._encodedHeight);
     _timeStamp = encodedImage._timeStamp;
     _captureTimeMs = encodedImage.capture_time_ms_;
     _ntpTimeMs = encodedImage.ntp_time_ms_;
     _flags = encodedImage.timing_.flags;
     _encodeStartMs = encodedImage.timing_.encode_start_ms;
     _encodeFinishMs = encodedImage.timing_.encode_finish_ms;
-    _frameType = (RTCFrameType)encodedImage._frameType;
-    _rotation = encodedImage.rotation_;
+    _frameType = static_cast<RTCFrameType>(encodedImage._frameType);
+    _rotation = static_cast<RTCVideoRotation>(encodedImage.rotation_);
     _completeFrame = encodedImage._completeFrame;
     _qp = encodedImage.qp_ == -1 ? nil : @(encodedImage.qp_);
     _contentType = (encodedImage.content_type_ == webrtc::VideoContentType::SCREENSHARE) ?
         RTCVideoContentTypeScreenshare :
         RTCVideoContentTypeUnspecified;
   }
 
   return self;
 }
 
 - (webrtc::EncodedImage)nativeEncodedImage {
   // Return the pointer without copying.
   webrtc::EncodedImage encodedImage(
       (uint8_t *)_buffer.bytes, (size_t)_buffer.length, (size_t)_buffer.length);
-  encodedImage._encodedWidth = _encodedWidth;
-  encodedImage._encodedHeight = _encodedHeight;
+  encodedImage._encodedWidth = rtc::dchecked_cast<uint32_t>(_encodedWidth);
+  encodedImage._encodedHeight = rtc::dchecked_cast<uint32_t>(_encodedHeight);
   encodedImage._timeStamp = _timeStamp;
   encodedImage.capture_time_ms_ = _captureTimeMs;
   encodedImage.ntp_time_ms_ = _ntpTimeMs;
   encodedImage.timing_.flags = _flags;
   encodedImage.timing_.encode_start_ms = _encodeStartMs;
   encodedImage.timing_.encode_finish_ms = _encodeFinishMs;
   encodedImage._frameType = webrtc::FrameType(_frameType);
   encodedImage.rotation_ = webrtc::VideoRotation(_rotation);
   encodedImage._completeFrame = _completeFrame;
   encodedImage.qp_ = _qp ? _qp.intValue : -1;
   encodedImage.content_type_ = (_contentType == RTCVideoContentTypeScreenshare) ?
       webrtc::VideoContentType::SCREENSHARE :
       webrtc::VideoContentType::UNSPECIFIED;
 
   return encodedImage;
 }
 
 @end