1 // -*- mode: C++; tab-width: 4 -*-
2 // vi: ts=4
3 
4 /*
5  * Copyright (c) 2009, Patrick A. Palmer.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions are met:
10  *
11  *   - Redistributions of source code must retain the above copyright notice,
12  *     this list of conditions and the following disclaimer.
13  *
14  *   - Redistributions in binary form must reproduce the above copyright
15  *     notice, this list of conditions and the following disclaimer in the
16  *     documentation and/or other materials provided with the distribution.
17  *
18  *   - Neither the name of Patrick A. Palmer nor the names of its
19  *     contributors may be used to endorse or promote products derived from
20  *     this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32  * POSSIBILITY OF SUCH DAMAGE.
33  */
34 
35 
36 #ifndef _DPX_RUNLENGTHENCODING_H
37 #define _DPX_RUNLENGTHENCODING_H 1
38 
39 
40 #include "DPX.h"
41 #include "Codec.h"
42 
43 
44 namespace dpx
45 {
46 
47 	/*!
48 	 * \brief compress / decompress data segments, used for RLE compression
49 	 */
50 	class RunLengthEncoding : public Codec
51 	{
52 	public:
53 		/*!
54 		 * \brief constructor
55 		 */
56 		RunLengthEncoding();
57 
58 		/*!
59 		 * \brief destructor
60 		 */
61 		virtual ~RunLengthEncoding();
62 
63 		/*!
64 		 * \brief reset instance
65 		 */
66 		virtual void Reset();
67 
68 		/*!
69 		 * \brief read data
70 		 * \param dpxHeader dpx header information
71 		 * \param fd field descriptor
72 		 * \param element element (0-7)
73 		 * \param block image area to read
74 		 * \param data buffer
75 		 * \param size size of the buffer component
76 		 * \return success
77 		 */
78 		virtual bool Read(const dpx::Header &dpxHeader,
79 						  ElementReadStream *fd,
80 						  const int element,
81 						  const Block &block,
82 						  void *data,
83 						  const DataSize size);
84 
85 	protected:
86 		U8 *buf;			//!< intermediate buffer
87 	};
88 
89 
90 }
91 
92 
93 #endif
94 
95 
96