- Main Page
- Namespaces
- Classes
- Files
- Directories

- File List
- File Members

# mot_comp.h

    00001 /* ***** BEGIN LICENSE BLOCK *****
    00002 *
    00003 * $Id: mot_comp.h,v 1.2 2005/01/30 05:11:40 gabest Exp $ $Name:  $
    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): Richard Felton (Original Author), Thomas Davies
    00024 *
    00025 * Alternatively, the contents of this file may be used under the terms of
    00026 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser
    00027 * Public License Version 2.1 (the "LGPL"), in which case the provisions of
    00028 * the GPL or the LGPL are applicable instead of those above. If you wish to
    00029 * allow use of your version of this file only under the terms of the either
    00030 * the GPL or LGPL and not to allow others to use your version of this file
    00031 * under the MPL, indicate your decision by deleting the provisions above
    00032 * and replace them with the notice and other provisions required by the GPL
    00033 * or LGPL. If you do not delete the provisions above, a recipient may use
    00034 * your version of this file under the terms of any one of the MPL, the GPL
    00035 * or the LGPL.
    00036 * ***** END LICENSE BLOCK ***** */
    00037
    00038 //  Motion Compensation routines.
    00039 //  Supports different sizes of blocks as long as the parameters
    00040 //     describing them are 'legal'. Blocks overlap the edge of the image
    00041 //     being written to but blocks in the reference image are forced to
    00042 //     lie completely within the image bounds.
    00043
    00044 #ifndef _INCLUDED_MOT_COMP
    00045 #define _INCLUDED_MOT_COMP
    00046
    00047 #include <cstdlib>
    00048 #include <ctime>
    00049 #include <iostream>
    00050 #include <libdirac_common/common.h>
    00051 #include <libdirac_common/upconvert.h>
    00052 #include <libdirac_common/motion.h>
    00053
    00054 namespace dirac
    00055 {
    00056     class FrameBuffer;
    00057     class Frame;
    00058
    00060
    00064     class MotionCompensator
    00065     {
    00066
    00067     public:
    00069
    00072         MotionCompensator( const CodecParams &cp , const AddOrSub direction  );
    00074         ~MotionCompensator();
    00075
    00077
    00084         void CompensateFrame( FrameBuffer& my_buffer , int fnum , const MvData& mv_data );
    00085
    00086     private:
    00087         //private, body-less copy constructor: this class should not be copied
    00088         MotionCompensator( const MotionCompensator& cpy );
    00089         //private, body-less assignment=: this class should not be assigned
    00090         MotionCompensator& operator=( const MotionCompensator& rhs );
    00091
    00092         //functions
    00093
    00095         void CompensateComponent( Frame& picframe , const Frame& ref1frame ,
    00096             const Frame& ref2frame ,
    00097             const MvData& mv_data , const CompSort cs);
    00098
    00100         void CompensateBlock( TwoDArray<CalcValueType>& pic_data ,
    00101             const PicArray& refup_data , const MVector& Vec ,
    00102             const ImageCoords& Pos , const TwoDArray<CalcValueType>& Weights );
    00103
    00105         void DCBlock( TwoDArray<CalcValueType> &pic_data , const ValueType dc ,
    00106             const ImageCoords& Pos , const TwoDArray<CalcValueType>& Weights);
    00107
    00109         void ReConfig();
    00110
    00111         // Overlapping blocks are acheived by applying a 2D raised cosine shape
    00112         // to them. This function facilitates the calculations
    00113         float RaisedCosine(float t, float B);
    00114
    00116
    00127         void CreateBlock(const OLBParams &bparams, bool FullX, bool FullY, TwoDArray<CalcValueType>& WeightArray);
    00128
    00130         void FlipX(const TwoDArray<CalcValueType>& Original, const OLBParams &bparams, TwoDArray<CalcValueType>& Flipped);
    00131
    00133         void FlipY(const TwoDArray<CalcValueType>& Original, const OLBParams &bparams, TwoDArray<CalcValueType>& Flipped);
    00134
    00135     private:
    00136         //variables
    00137
    00139         CodecParams m_cparams;
    00140
    00142         ChromaFormat m_cformat;
    00143         bool luma_or_chroma;    //true if we're doing luma, false if we're coding chroma
    00144
    00145         // A marker saying whether we're doing MC addition or subtraction
    00146         AddOrSub m_add_or_sub;
    00147
    00148         // Block information
    00149         OLBParams m_bparams;
    00150         TwoDArray<CalcValueType>* m_block_weights;
    00151         TwoDArray<CalcValueType>* m_half_block_weights;
    00152
    00153     };
    00154
    00155 } // namespace dirac
    00156
    00157 #endif