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-rw-r--r--src/lib/util/huffman.h62
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diff --git a/src/lib/util/huffman.h b/src/lib/util/huffman.h
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+++ b/src/lib/util/huffman.h
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+/***************************************************************************
+
+ huffman.h
+
+ Huffman compression routines.
+
+ Copyright (c) 1996-2007, Nicola Salmoria and the MAME Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+***************************************************************************/
+
+#ifndef __HUFFMAN_H__
+
+#include "osdcore.h"
+
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+enum _huffman_error
+{
+ HUFFERR_NONE = 0,
+ HUFFERR_OUT_OF_MEMORY,
+ HUFFERR_TOO_MANY_BITS,
+ HUFFERR_INVALID_DATA,
+ HUFFERR_INPUT_BUFFER_TOO_SMALL,
+ HUFFERR_OUTPUT_BUFFER_TOO_SMALL,
+ HUFFERR_INTERNAL_INCONSISTENCY
+};
+typedef enum _huffman_error huffman_error;
+
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+typedef UINT16 huffman_lookup_value;
+
+typedef struct _huffman_context huffman_context;
+
+
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+huffman_error huffman_create_context(huffman_context **context, int maxbits);
+void huffman_free_context(huffman_context *context);
+
+huffman_error huffman_compute_tree(huffman_context *context, const UINT8 *source, UINT32 slength, UINT32 sstride);
+huffman_error huffman_import_tree(huffman_context *context, const UINT8 *source, UINT32 slength, UINT32 *actlength);
+huffman_error huffman_export_tree(huffman_context *context, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
+huffman_error huffman_get_lookup_table(huffman_context *context, const huffman_lookup_value **table);
+
+huffman_error huffman_encode_data(huffman_context *context, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
+huffman_error huffman_encode_data_interleaved_2(huffman_context *context1, huffman_context *context2, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
+huffman_error huffman_decode_data(huffman_context *context, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
+huffman_error huffman_decode_data_interleaved_2(huffman_context *context1, huffman_context *context2, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
+
+#endif