Obj-C SDK Cleanup

This CL separates the files under sdk/objc into logical directories, replacing
the previous file layout under Framework/.

A long term goal is to have some system set up to generate the files under
sdk/objc/api (the PeerConnection API wrappers) from the C++ code. In the shorter
term the goal is to abstract out shared concepts from these classes in order to
make them as uniform as possible.

The separation into base/, components/, and helpers/ are to differentiate between
the base layer's common protocols, various utilities and the actual platform
specific components.

The old directory layout that resembled a framework's internal layout is not
necessary, since it is generated by the framework target when building it.

Bug: webrtc:9627
Change-Id: Ib084fd83f050ae980649ca99e841f4fb0580bd8f
Reviewed-on: https://webrtc-review.googlesource.com/94142
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24493}

sdk/objc/native/src/objc_frame_buffer.mm

@@ -0,0 +1,87 @@
+/*
+ *  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.
+ */
+
+#include "sdk/objc/native/src/objc_frame_buffer.h"
+
+#import "base/RTCVideoFrameBuffer.h"
+#import "sdk/objc/api/video_frame_buffer/RTCI420Buffer+Private.h"
+
+namespace webrtc {
+
+namespace {
+
+/** ObjCFrameBuffer that conforms to I420BufferInterface by wrapping RTCI420Buffer */
+class ObjCI420FrameBuffer : public I420BufferInterface {
+ public:
+  explicit ObjCI420FrameBuffer(id<RTCI420Buffer> frame_buffer)
+      : frame_buffer_(frame_buffer), width_(frame_buffer.width), height_(frame_buffer.height) {}
+  ~ObjCI420FrameBuffer() override{};
+
+  int width() const override { return width_; }
+
+  int height() const override { return height_; }
+
+  const uint8_t* DataY() const override { return frame_buffer_.dataY; }
+
+  const uint8_t* DataU() const override { return frame_buffer_.dataU; }
+
+  const uint8_t* DataV() const override { return frame_buffer_.dataV; }
+
+  int StrideY() const override { return frame_buffer_.strideY; }
+
+  int StrideU() const override { return frame_buffer_.strideU; }
+
+  int StrideV() const override { return frame_buffer_.strideV; }
+
+ private:
+  id<RTCI420Buffer> frame_buffer_;
+  int width_;
+  int height_;
+};
+
+}  // namespace
+
+ObjCFrameBuffer::ObjCFrameBuffer(id<RTCVideoFrameBuffer> frame_buffer)
+    : frame_buffer_(frame_buffer), width_(frame_buffer.width), height_(frame_buffer.height) {}
+
+ObjCFrameBuffer::~ObjCFrameBuffer() {}
+
+VideoFrameBuffer::Type ObjCFrameBuffer::type() const {
+  return Type::kNative;
+}
+
+int ObjCFrameBuffer::width() const {
+  return width_;
+}
+
+int ObjCFrameBuffer::height() const {
+  return height_;
+}
+
+rtc::scoped_refptr<I420BufferInterface> ObjCFrameBuffer::ToI420() {
+  rtc::scoped_refptr<I420BufferInterface> buffer =
+      new rtc::RefCountedObject<ObjCI420FrameBuffer>([frame_buffer_ toI420]);
+
+  return buffer;
+}
+
+id<RTCVideoFrameBuffer> ObjCFrameBuffer::wrapped_frame_buffer() const {
+  return frame_buffer_;
+}
+
+id<RTCVideoFrameBuffer> ToObjCVideoFrameBuffer(const rtc::scoped_refptr<VideoFrameBuffer>& buffer) {
+  if (buffer->type() == VideoFrameBuffer::Type::kNative) {
+    return static_cast<ObjCFrameBuffer*>(buffer.get())->wrapped_frame_buffer();
+  } else {
+    return [[RTCI420Buffer alloc] initWithFrameBuffer:buffer->ToI420()];
+  }
+}
+
+}  // namespace webrtc