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diff --git a/gpr/source/lib/vc5_decoder/parameters.h b/gpr/source/lib/vc5_decoder/parameters.h
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+/*! @file parameters.h
+ *
+ *  @brief Declare a data structure for holding a table of parameters used
+ *  during decoding to override the default decoding behavior.
+ 
+ *  The decoder can be initialized using the dimensions of the encoded frame
+ *  obtained from an external source such as a media container and the pixel
+ *  format of the decoded frame.  The encoded sample will be decoded to the
+ *  dimensions of the encoded frame without at the full encoded resolution
+ *  without scaling.  The decoded frames will have the specified pixel format,
+ *  but this assumes that the encoded dimensions used during initialization
+ *  are the same as the actual encoded dimensions and that the pixel format of
+ *  the decoded frames is a valid pixel format.
+ *
+ *  (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 PARAMETERS_H
+#define PARAMETERS_H
+
+#include "vc5_decoder.h"
+
+/*!
+	@brief Declaration of a data structure for passing decoding parameters to the decoder
+*/
+typedef struct _decoder_parameters
+{
+	uint32_t version;			//!< Version number for this definition of the parameters
+	
+	uint32_t enabled_parts;		//!< Parts of the VC-5 standard that are enabled
+
+#if VC5_ENABLED_PART(VC5_PART_LAYERS)
+	int layer_count;		//!< Number of layers in the sample
+	bool progressive;		//!< True if the frame is progressive
+	bool top_field_first;	//!< True if interlaced with top field first
+#endif
+
+#if VC5_ENABLED_PART(VC5_PART_SECTIONS)
+    bool section_flag;          //!< True if decoding sections element in the bitstream
+#endif
+    
+	//! Dimensions and format of the output of the image unpacking process
+	struct _input_parameters
+	{
+		DIMENSION width;
+		DIMENSION height;
+		// PIXEL_FORMAT format;
+	} input;		//! Dimensions and format of the unpacked image
+
+#if VC5_ENABLED_PART(VC5_PART_IMAGE_FORMATS)
+	//! Dimensions and format of the output of the decoding process
+	struct _decoded_parameters
+	{
+		DIMENSION width;
+		DIMENSION height;
+		PIXEL_FORMAT format;
+	} decoded;		//! Decoded image dimensions and pixel format
+#endif
+
+#if VC5_ENABLED_PART(VC5_PART_ELEMENTARY)
+	//! Dimensions and format of the output of the image repacking process
+	struct _output_parameters
+	{
+		DIMENSION width;
+		DIMENSION height;
+		PIXEL_FORMAT format;
+	} output;
+#endif
+
+#if VC5_ENABLED_PART(VC5_PART_IMAGE_FORMATS)
+	//! Dimensions and format of the displayable image
+	struct _display_parameters
+	{
+		DIMENSION width;
+		DIMENSION height;
+		PIXEL_FORMAT format;
+	} display;
+#endif
+
+#if VC5_ENABLED_PART(VC5_PART_METADATA)
+	//! Metadata that controls decoding
+	METADATA metadata;
+#endif
+
+	//! Flag that controls verbose output
+	bool verbose_flag;
+    
+    GPR_RGB_RESOLUTION  rgb_resolution;
+    
+    int                         rgb_bits;
+    
+    gpr_rgb_gain                rgb_gain;
+    
+    gpr_allocator allocator;
+    
+} DECODER_PARAMETERS;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    CODEC_ERROR InitDecoderParameters(DECODER_PARAMETERS *parameters);
+
+#ifdef __cplusplus
+}
+#endif
+    
+#endif // PARAMETERS_H