Move RTCI420Frame to webrtc/api/objc/RTCVideoFrame with minor style changes.

BUG=
R=tkchin@webrtc.org

Review URL: https://codereview.webrtc.org/1533193003 .

Patch from Jon Hjelle <hjon@andyet.net>.

Cr-Commit-Position: refs/heads/master@{#11203}

webrtc/api/BUILD.gn

@@ -32,6 +32,9 @@ if (is_ios) {
       "objc/RTCSessionDescription+Private.h",
       "objc/RTCSessionDescription.h",
       "objc/RTCSessionDescription.mm",
+      "objc/RTCVideoFrame+Private.h",
+      "objc/RTCVideoFrame.h",
+      "objc/RTCVideoFrame.mm",
       "objc/WebRTC-Prefix.pch",
     ]
   }

webrtc/api/api.gyp

@@ -31,6 +31,9 @@
             'objc/RTCSessionDescription+Private.h',
             'objc/RTCSessionDescription.h',
             'objc/RTCSessionDescription.mm',
+            'objc/RTCVideoFrame+Private.h',
+            'objc/RTCVideoFrame.h',
+            'objc/RTCVideoFrame.mm',
           ],
           'xcode_settings': {
             'CLANG_ENABLE_OBJC_ARC': 'YES',

webrtc/api/objc/RTCVideoFrame+Private.h

@@ -0,0 +1,24 @@
+/*
+ *  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.h"
+
+#include "talk/media/base/videoframe.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RTCVideoFrame ()
+
+- (instancetype)initWithNativeFrame:(const cricket::VideoFrame *)nativeFrame
+    NS_DESIGNATED_INITIALIZER;
+
+@end
+
+NS_ASSUME_NONNULL_END

webrtc/api/objc/RTCVideoFrame.h

@@ -0,0 +1,37 @@
+/*
+ *  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 <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RTCVideoFrame : NSObject
+
+/** Width without rotation applied. */
+@property(nonatomic, readonly) size_t width;
+
+/** Height without rotation applied. */
+@property(nonatomic, readonly) size_t height;
+@property(nonatomic, readonly) size_t chromaWidth;
+@property(nonatomic, readonly) size_t chromaHeight;
+@property(nonatomic, readonly) size_t chromaSize;
+// These can return NULL if the object is not backed by a buffer.
+@property(nonatomic, readonly, nullable) const uint8_t *yPlane;
+@property(nonatomic, readonly, nullable) const uint8_t *uPlane;
+@property(nonatomic, readonly, nullable) const uint8_t *vPlane;
+@property(nonatomic, readonly) int32_t yPitch;
+@property(nonatomic, readonly) int32_t uPitch;
+@property(nonatomic, readonly) int32_t vPitch;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

webrtc/api/objc/RTCVideoFrame.mm

@@ -0,0 +1,79 @@
+/*
+ *  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.h"
+
+#include "webrtc/base/scoped_ptr.h"
+
+#import "webrtc/api/objc/RTCVideoFrame+Private.h"
+
+@implementation RTCVideoFrame {
+  rtc::scoped_ptr<cricket::VideoFrame> _videoFrame;
+}
+
+- (size_t)width {
+  return _videoFrame->GetWidth();
+}
+
+- (size_t)height {
+  return _videoFrame->GetHeight();
+}
+
+- (size_t)chromaWidth {
+  return _videoFrame->GetChromaWidth();
+}
+
+- (size_t)chromaHeight {
+  return _videoFrame->GetChromaHeight();
+}
+
+- (size_t)chromaSize {
+  return _videoFrame->GetChromaSize();
+}
+
+- (const uint8_t *)yPlane {
+  const cricket::VideoFrame *const_frame = _videoFrame.get();
+  return const_frame->GetYPlane();
+}
+
+- (const uint8_t *)uPlane {
+  const cricket::VideoFrame *const_frame = _videoFrame.get();
+  return const_frame->GetUPlane();
+}
+
+- (const uint8_t *)vPlane {
+  const cricket::VideoFrame *const_frame = _videoFrame.get();
+  return const_frame->GetVPlane();
+}
+
+- (int32_t)yPitch {
+  return _videoFrame->GetYPitch();
+}
+
+- (int32_t)uPitch {
+  return _videoFrame->GetUPitch();
+}
+
+- (int32_t)vPitch {
+  return _videoFrame->GetVPitch();
+}
+
+#pragma mark - Private
+
+- (instancetype)initWithNativeFrame:(const cricket::VideoFrame *)nativeFrame {
+  if (self = [super init]) {
+    // Keep a shallow copy of the video frame. The underlying frame buffer is
+    // not copied.
+    _videoFrame.reset(nativeFrame->Copy());
+  }
+  return self;
+}
+
+@end