/src/FreeImage/Source/OpenEXR/IlmImf/ImfHuf.h

 1///////////////////////////////////////////////////////////////////////////
 2//
 3// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
 4// Digital Ltd. LLC
 5// 
 6// All rights reserved.
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33///////////////////////////////////////////////////////////////////////////
34
35
36
37#ifndef INCLUDED_IMF_HUF_H
38#define INCLUDED_IMF_HUF_H
39
40
41//-----------------------------------------------------------------------------
42//
43//	16-bit Huffman compression and decompression:
44//
45//	hufCompress (r, nr, c)
46//
47//		Compresses the contents of array r (of length nr),
48//		stores the compressed data in array c, and returns
49//		the size of the compressed data (in bytes).
50//
51//		To avoid buffer overflows, the size of array c should
52//		be at least 2 * nr + 65536.
53//
54//	hufUncompress (c, nc, r, nr)
55//
56//		Uncompresses the data in array c (with length nc),
57//		and stores the results in array r (with length nr).
58//
59//-----------------------------------------------------------------------------
60
61namespace Imf {
62
63
64int
65hufCompress (const unsigned short raw[/*nRaw*/],
66	     int nRaw,
67	     char compressed[/*2 * nRaw + 65536*/]);
68
69
70void
71hufUncompress (const char compressed[/*nCompressed*/],
72	       int nCompressed,
73	       unsigned short raw[/*nRaw*/],
74	       int nRaw);
75
76
77} // namespace Imf
78
79#endif