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+/*! @file codebooks.h
+ *
+ *  @brief Declaration of the routines for computing the encoding tables from a codebook.
+ 
+ *  A codebooks contains the variable-length codes for coefficient magnitudes, runs
+ *  of zeros, and special codewords that mark entropy codec locations in bitstream.
+ 
+ *  The codebook is used to create tables and simplify entropy coding of signed values
+ *  and runs of zeros.
+ *
+ *  (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 CODEBOOKS_H
+#define CODEBOOKS_H
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    /*!
+     Codeset data structure that is used by the encoder
+     */
+    typedef struct encoder_codeset {
+        
+        const char *title;					//!< Identifying string for the codeset
+        
+        const CODEBOOK *codebook;			//!< Codebook for runs and magnitudes
+
+        uint32_t flags;						//!< Encoding flags (see the codeset flags)
+        
+        const MAGS_TABLE *mags_table;		//!< Table for encoding coefficient magnitudes
+        
+        const RUNS_TABLE *runs_table;		//!< Table for encoding runs of zeros
+        
+    } ENCODER_CODESET;
+    
+    extern ENCODER_CODESET encoder_codeset_17;
+        
+    CODEC_ERROR PrepareCodebooks(const gpr_allocator *allocator, ENCODER_CODESET *cs);
+    
+    CODEC_ERROR ReleaseCodebooks(gpr_allocator *allocator, ENCODER_CODESET *cs);    
+    
+    CODEC_ERROR ComputeRunLengthCodeTable(const gpr_allocator *allocator,
+                                          RLV *input_codes, int input_length,
+                                          RLC *output_codes, int output_length);
+    
+    CODEC_ERROR SortDecreasingRunLength(RLC *codebook, int length);
+    
+    CODEC_ERROR FillRunLengthEncodingTable(RLC *codebook, int codebook_length,
+                                           RLC *table, int table_length);
+    
+    CODEC_ERROR FillMagnitudeEncodingTable(const CODEBOOK *codebook, VLE *table, int size, uint32_t flags);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // CODEBOOKS_H