Reland of Injectable Obj-C video codecs

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"
+
+@implementation RTCEncodedImage
+
+@synthesize buffer = _buffer;
+@synthesize encodedWidth = _encodedWidth;
+@synthesize encodedHeight = _encodedHeight;
+@synthesize timeStamp = _timeStamp;
+@synthesize captureTimeMs = _captureTimeMs;
+@synthesize ntpTimeMs = _ntpTimeMs;
+@synthesize isTimingFrame = _isTimingFrame;
+@synthesize encodeStartMs = _encodeStartMs;
+@synthesize encodeFinishMs = _encodeFinishMs;
+@synthesize frameType = _frameType;
+@synthesize rotation = _rotation;
+@synthesize completeFrame = _completeFrame;
+@synthesize qp = _qp;
+
+- (instancetype)initWithEncodedImage:(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;
+    _timeStamp = encodedImage._timeStamp;
+    _captureTimeMs = encodedImage.capture_time_ms_;
+    _ntpTimeMs = encodedImage.ntp_time_ms_;
+    _isTimingFrame = encodedImage.timing_.is_timing_frame;
+    _encodeStartMs = encodedImage.timing_.encode_start_ms;
+    _encodeFinishMs = encodedImage.timing_.encode_finish_ms;
+    _frameType = (RTCFrameType)encodedImage._frameType;
+    _rotation = encodedImage.rotation_;
+    _completeFrame = encodedImage._completeFrame;
+    _qp = encodedImage.qp_ == -1 ? nil : @(encodedImage.qp_);
+  }
+
+  return self;
+}
+
+- (webrtc::EncodedImage)toCpp {
+  // 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._timeStamp = _timeStamp;
+  encodedImage.capture_time_ms_ = _captureTimeMs;
+  encodedImage.ntp_time_ms_ = _ntpTimeMs;
+  encodedImage.timing_.is_timing_frame = _isTimingFrame;
+  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;
+
+  return encodedImage;
+}
+
+@end