Dirac - A Video Codec

Created by the British Broadcasting Corporation.


picture_byteio.h

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00001 /* ***** BEGIN LICENSE BLOCK *****
00002 *
00003 * $Id: picture_byteio.h,v 1.1 2008/01/31 11:25:15 tjdwave Exp $ $Name: Dirac_1_0_2 $
00004 *
00005 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00006 *
00007 * The contents of this file are subject to the Mozilla Public License
00008 * Version 1.1 (the "License"); you may not use this file except in compliance
00009 * with the License. You may obtain a copy of the License at
00010 * http://www.mozilla.org/MPL/
00011 *
00012 * Software distributed under the License is distributed on an "AS IS" basis,
00013 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
00014 * the specific language governing rights and limitations under the License.
00015 *
00016 * The Original Code is BBC Research and Development code.
00017 *
00018 * The Initial Developer of the Original Code is the British Broadcasting
00019 * Corporation.
00020 * Portions created by the Initial Developer are Copyright (C) 2004.
00021 * All Rights Reserved.
00022 *
00023 * Contributor(s): Andrew Kennedy (Original Author)
00024 *                 Anuradha Suraparaju
00025 *
00026 * Alternatively, the contents of this file may be used under the terms of
00027 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
00028 * Public License Version 2.1 (the "LGPL"), in which case the provisions of
00029 * the GPL or the LGPL are applicable instead of those above. If you wish to
00030 * allow use of your version of this file only under the terms of the either
00031 * the GPL or LGPL and not to allow others to use your version of this file
00032 * under the MPL, indicate your decision by deleting the provisions above
00033 * and replace them with the notice and other provisions required by the GPL
00034 * or LGPL. If you do not delete the provisions above, a recipient may use
00035 * your version of this file under the terms of any one of the MPL, the GPL
00036 * or the LGPL.
00037 * ***** END LICENSE BLOCK ***** */
00038 
00042 #ifndef picture_byteio_h
00043 #define picture_byteio_h
00044 
00045 
00046 //LOCAL INCLUDES
00047 #include <libdirac_byteio/parseunit_byteio.h>       // Parent class
00048 #include <libdirac_byteio/mvdata_byteio.h>          // Contains mvdata streams
00049 #include <libdirac_byteio/transform_byteio.h>       // Transform header
00050 
00051 // DIRAC includes
00052 #include <libdirac_common/common.h>                 // PictureType etc
00053 
00054 
00055 namespace dirac
00056 {
00060     class PictureByteIO : public ParseUnitByteIO
00061     {
00062     public:
00063 
00069         PictureByteIO(PictureParams& frame_params,
00070                     int frame_num);
00071 
00072 
00078         PictureByteIO(PictureParams& frame_params,
00079                     const ParseUnitByteIO& parseunit_byteio);
00080 
00084         virtual ~PictureByteIO();
00085 
00090         void CollateByteStats(DiracByteStats& dirac_byte_stats);
00091 
00095         bool Input();
00096 
00100         void Output();
00101 
00102         
00103 
00104         const std::string GetBytes();
00105 
00106         int GetSize() const;
00107 
00111         ParseUnitType GetType() const { return PU_PICTURE;}
00112 
00116         int IsRef() const { return (GetParseCode()&0x0C)==0x0C;}
00117 
00121         int IsNonRef() const { return (GetParseCode()&0x0C)==0x08;}
00122 
00126         int NumRefs() const { return (GetParseCode()&0x03);}
00127 
00131         bool IsIntra() const { return IsPicture() && (NumRefs()==0) ; }
00132 
00136         bool IsInter() const { return IsPicture() && (NumRefs()>0) ; }
00137 
00138         /***
00139         * Sets the MVDataIO
00140         */
00141         void SetMvData(MvDataByteIO *mv_data) {m_mv_data = mv_data; }
00142 
00143         /***
00144         * Sets the TransformByteIo
00145         */
00146         void SetTransformData(TransformByteIO *transform_data) {m_transform_data = transform_data; }
00147 
00148   protected:
00149         
00150 
00151    private:
00152       
00157         unsigned char CalcParseCode() const;
00158 
00162         void InputReferencePictures();
00163 
00167         void InputRetiredPicture();
00168 
00172         void SetPictureType();
00173 
00177         void SetReferenceType();
00178 
00182         void SetEntropyCodingFlag();
00183 
00187         PictureParams&        m_frame_params;
00188 
00192         int     m_frame_num;
00193 
00197         MvDataByteIO * m_mv_data;
00198        
00202         TransformByteIO * m_transform_data;
00203        
00204    };
00205 
00206 } // namespace dirac
00207 
00208 #endif

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