Add a webrtc{en,de}coderfactory implementation for VideoToolbox

webrtc/sdk/objc/Framework/Classes/h264_video_toolbox_decoder.h

 /*
  *  Copyright (c) 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.
  *
  */
 
-#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_DECODER_H_
-#define WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_DECODER_H_
+#ifndef WEBRTC_SDK_OBJC_FRAMEWORK_CLASSES_H264_VIDEO_TOOLBOX_DECODER_H_
+#define WEBRTC_SDK_OBJC_FRAMEWORK_CLASSES_H264_VIDEO_TOOLBOX_DECODER_H_
 
 #include "webrtc/modules/video_coding/codecs/h264/include/h264.h"
 
-#if defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
-
 #include <VideoToolbox/VideoToolbox.h>
 
 // This file provides a H264 encoder implementation using the VideoToolbox
 // APIs. Since documentation is almost non-existent, this is largely based on
 // the information in the VideoToolbox header files, a talk from WWDC 2014 and
 // experimentation.
 
 namespace webrtc {
 
 class H264VideoToolboxDecoder : public H264Decoder {
@@ skipping 22 matching lines @@
   void DestroyDecompressionSession();
   void SetVideoFormat(CMVideoFormatDescriptionRef video_format);
 
   DecodedImageCallback* callback_;
   CMVideoFormatDescriptionRef video_format_;
   VTDecompressionSessionRef decompression_session_;
 };  // H264VideoToolboxDecoder
 
 }  // namespace webrtc
 
-#endif  // defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
-#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_DECODER_H_
+#endif // WEBRTC_SDK_OBJC_FRAMEWORK_CLASSES_H264_VIDEO_TOOLBOX_DECODER_H_