VideoFrameBuffer: Make non-const data access explicit

webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.cc

 /*
  *  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.
  *
  */
@@ skipping 46 matching lines @@
       new rtc::RefCountedObject<webrtc::I420Buffer>(width, height);
   CVPixelBufferLockBaseAddress(pixel_buffer, kCVPixelBufferLock_ReadOnly);
   const uint8* src_y = reinterpret_cast<const uint8*>(
       CVPixelBufferGetBaseAddressOfPlane(pixel_buffer, 0));
   int src_y_stride = CVPixelBufferGetBytesPerRowOfPlane(pixel_buffer, 0);
   const uint8* src_uv = reinterpret_cast<const uint8*>(
       CVPixelBufferGetBaseAddressOfPlane(pixel_buffer, 1));
   int src_uv_stride = CVPixelBufferGetBytesPerRowOfPlane(pixel_buffer, 1);
   int ret = libyuv::NV12ToI420(
       src_y, src_y_stride, src_uv, src_uv_stride,
-      buffer->data(webrtc::kYPlane), buffer->stride(webrtc::kYPlane),
-      buffer->data(webrtc::kUPlane), buffer->stride(webrtc::kUPlane),
-      buffer->data(webrtc::kVPlane), buffer->stride(webrtc::kVPlane),
+      buffer->MutableData(webrtc::kYPlane), buffer->stride(webrtc::kYPlane),
+      buffer->MutableData(webrtc::kUPlane), buffer->stride(webrtc::kUPlane),
+      buffer->MutableData(webrtc::kVPlane), buffer->stride(webrtc::kVPlane),
       width, height);
   CVPixelBufferUnlockBaseAddress(pixel_buffer, kCVPixelBufferLock_ReadOnly);
   if (ret) {
     LOG(LS_ERROR) << "Error converting NV12 to I420: " << ret;
     return nullptr;
   }
   return buffer;
 }
 
 // This is the callback function that VideoToolbox calls when decode is
@@ skipping 182 matching lines @@
   }
   video_format_ = video_format;
   if (video_format_) {
     CFRetain(video_format_);
   }
 }
 
 }  // namespace webrtc
 
 #endif  // defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)