iOS render: Handle frame rotation in OpenGL

webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm

 /*
  *  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 "RTCVideoFrame+Private.h"
 
 #include <memory>
 
 @implementation RTCVideoFrame {
-  std::unique_ptr<cricket::VideoFrame> _videoFrame;
+  rtc::scoped_refptr<webrtc::VideoFrameBuffer> _videoBuffer;
+  int _rotation;
+  int64_t _timeStampNs;
   rtc::scoped_refptr<webrtc::VideoFrameBuffer> _i420Buffer;
 }
 
 - (size_t)width {
-  return _videoFrame->width();
+  return _videoBuffer->width();
 }
 
 - (size_t)height {
-  return _videoFrame->height();
+  return _videoBuffer->height();
+}
+
+- (int)rotation {
+  return _rotation;
 }
 
 // TODO(nisse): chromaWidth and chromaHeight are used only in
 // RTCOpenGLVideoRenderer.mm. Update, and then delete these
 // properties.
 - (size_t)chromaWidth {
   return (self.width + 1) / 2;
 }
 
 - (size_t)chromaHeight {
@@ skipping 35 matching lines @@
   return self.i420Buffer->StrideU();
 }
 
 - (int32_t)vPitch {
   if (!self.i420Buffer) {
     return 0;
   }
   return self.i420Buffer->StrideV();
 }
 
-- (int64_t)timeStamp {
-  return _videoFrame->GetTimeStamp();
+- (int64_t)timeStampNs {
+  return _timeStampNs;
 }
 
 - (CVPixelBufferRef)nativeHandle {
-  return static_cast<CVPixelBufferRef>(
-      _videoFrame->video_frame_buffer()->native_handle());
+  return static_cast<CVPixelBufferRef>(_videoBuffer->native_handle());
 }
 
 - (void)convertBufferIfNeeded {
   if (!_i420Buffer) {
-    if (_videoFrame->video_frame_buffer()->native_handle()) {
-      // Convert to I420.
-      _i420Buffer = _videoFrame->video_frame_buffer()->NativeToI420Buffer();
-    } else {
-      // Should already be I420.
-      _i420Buffer = _videoFrame->video_frame_buffer();
-    }
+    _i420Buffer = _videoBuffer->native_handle()
+                      ? _videoBuffer->NativeToI420Buffer()
+                      : _videoBuffer;
   }
 }
 
 #pragma mark - Private
 
-- (instancetype)initWithNativeFrame:(const cricket::VideoFrame *)nativeFrame {
+- (instancetype)initWithVideoBuffer:
+                    (rtc::scoped_refptr<webrtc::VideoFrameBuffer>)videoBuffer
+                           rotation:(int)rotation
+                        timeStampNs:(int64_t)timeStampNs {
   if (self = [super init]) {
-    // Keep a shallow copy of the video frame. The underlying frame buffer is
-    // not copied.
-    _videoFrame.reset(nativeFrame->Copy());
+    _videoBuffer = videoBuffer;
+    _rotation = rotation;
+    _timeStampNs = timeStampNs;
   }
   return self;
 }
 
 - (rtc::scoped_refptr<webrtc::VideoFrameBuffer>)i420Buffer {
   [self convertBufferIfNeeded];
   return _i420Buffer;
 }
 
 @end