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diff --git a/gpr/source/lib/gpr_sdk/private/gpr_utils.h b/gpr/source/lib/gpr_sdk/private/gpr_utils.h
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+++ b/gpr/source/lib/gpr_sdk/private/gpr_utils.h
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+/*! @file gpr_utils.h
+ *
+ *  @brief Declaration of general gpr functions that belong in gpr library
+ *
+ *  GPR API can be invoked by simply including this header file.
+ *  This file includes all other header files that are needed.
+ *
+ *  (C) Copyright 2018 GoPro Inc (http://gopro.com/).
+ *
+ *  Licensed under either:
+ *  - Apache License, Version 2.0, http://www.apache.org/licenses/LICENSE-2.0
+ *  - MIT license, http://opensource.org/licenses/MIT
+ *  at your option.
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef GPR_UTILS_H
+#define GPR_UTILS_H
+
+#include "gpr_buffer_auto.h"
+#include "dng_image.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    void CopyRawImageToBuffer( const dng_image& raw_image, gpr_buffer_auto& buffer );
+
+    void CopyBufferToRawImage( const gpr_buffer_auto& buffer, size_t buffer_stride, dng_image& raw_image );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // GPR_UTILS_H