# 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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