# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

picture_byteio.h
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1 /* ***** BEGIN LICENSE BLOCK *****
2 *
3 * $Id: picture_byteio.h,v 1.1 2008/01/31 11:25:15 tjdwave Exp $ $Name: Dirac_1_0_2 $
4 *
5 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 *
7 * The contents of this file are subject to the Mozilla Public License
8 * Version 1.1 (the "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 * http://www.mozilla.org/MPL/
11 *
12 * Software distributed under the License is distributed on an "AS IS" basis,
13 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
14 * the specific language governing rights and limitations under the License.
15 *
16 * The Original Code is BBC Research and Development code.
17 *
18 * The Initial Developer of the Original Code is the British Broadcasting
19 * Corporation.
20 * Portions created by the Initial Developer are Copyright (C) 2004.
21 * All Rights Reserved.
22 *
23 * Contributor(s): Andrew Kennedy (Original Author)
24 * Anuradha Suraparaju
25 *
26 * Alternatively, the contents of this file may be used under the terms of
27 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
28 * Public License Version 2.1 (the "LGPL"), in which case the provisions of
29 * the GPL or the LGPL are applicable instead of those above. If you wish to
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33 * and replace them with the notice and other provisions required by the GPL
34 * or LGPL. If you do not delete the provisions above, a recipient may use
35 * your version of this file under the terms of any one of the MPL, the GPL
36 * or the LGPL.
37 * ***** END LICENSE BLOCK ***** */
38
42 #ifndef picture_byteio_h
43 #define picture_byteio_h
44
45
46 //LOCAL INCLUDES
47 #include <libdirac_byteio/parseunit_byteio.h> // Parent class
48 #include <libdirac_byteio/mvdata_byteio.h> // Contains mvdata streams
49 #include <libdirac_byteio/transform_byteio.h> // Transform header
50
51 // DIRAC includes
52 #include <libdirac_common/common.h> // PictureType etc
53
54
55 namespace dirac
56 {
60 class PictureByteIO : public ParseUnitByteIO
61 {
62 public:
63
69 PictureByteIO(PictureParams& frame_params,
70 int frame_num);
71
72
78 PictureByteIO(PictureParams& frame_params,
79 const ParseUnitByteIO& parseunit_byteio);
80
84 virtual ~PictureByteIO();
85
90 void CollateByteStats(DiracByteStats& dirac_byte_stats);
91
95 bool Input();
96
100 void Output();
101
102
103
104 const std::string GetBytes();
105
106 int GetSize() const;
107
111 ParseUnitType GetType() const { return PU_PICTURE;}
112
116 int IsRef() const { return (GetParseCode()&0x0C)==0x0C;}
117
121 int IsNonRef() const { return (GetParseCode()&0x0C)==0x08;}
122
126 int NumRefs() const { return (GetParseCode()&0x03);}
127
131 bool IsIntra() const { return IsPicture() && (NumRefs()==0) ; }
132
136 bool IsInter() const { return IsPicture() && (NumRefs()>0) ; }
137
138 /***
139 * Sets the MVDataIO
140 */
141 void SetMvData(MvDataByteIO *mv_data) {m_mv_data = mv_data; }
142
143 /***
144 * Sets the TransformByteIo
145 */
146 void SetTransformData(TransformByteIO *transform_data) {m_transform_data = transform_data; }
147
148 protected:
149
150
151 private:
152
157 unsigned char CalcParseCode() const;
158
162 void InputReferencePictures();
163
167 void InputRetiredPicture();
168
172 void SetPictureType();
173
177 void SetReferenceType();
178
182 void SetEntropyCodingFlag();
183
187 PictureParams& m_frame_params;
188
192 int m_frame_num;
193
197 MvDataByteIO * m_mv_data;
198
202 TransformByteIO * m_transform_data;
203
204 };
205
206 } // namespace dirac
207
208 #endif

© 2004 British Broadcasting Corporation. Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
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