Gabriele Cosmo
383 lines
10 KiB
C++
383 lines
10 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: G4RTJpegCoder.cc,v 1.6 2006/06/29 21:23:55 gunter Exp $
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// GEANT4 tag $Name: geant4-09-00 $
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//
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//
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//
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#include <stdlib.h>
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#include <string.h>
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#include <cmath>
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#include "G4RTJpeg.hh"
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#include "G4RTOutBitStream.hh"
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#include "G4RTJpegMaker.hh"
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#include "G4RTJpegCoder.hh"
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#include "G4RTJpegCoderTables.hh"
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G4JpegCoder::G4JpegCoder(u_char* colorR,u_char* colorG,u_char* colorB)
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{
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mRgb[0] = colorR;
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mRgb[1] = colorG;
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mRgb[2] = colorB;
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mPreDC[0] = mPreDC[1] = mPreDC[2] = 0;
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mOBSP = 0;
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for(int n=0; n<8; n++)
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for(int m=0; m<8; m++)
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mCosT[n][m] = std::cos((2 * m + 1) * n * PaiDiv16);
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}
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G4JpegCoder::~G4JpegCoder(void)
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{
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if(mOBSP != 0)
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delete mOBSP;
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}
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void
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G4JpegCoder::GetJpegData(char** aJpegData, int& size)
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{
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if (mOBSP != 0){
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*aJpegData = (char*)mOBSP->GetStreamAddress();
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size = mOBSP->GetStreamSize();
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}
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else{
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*aJpegData = 0;
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size = 0;
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}
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}
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int
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G4JpegCoder::DoCoding(void)
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{
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mNumVUnits = (mProperty.nRow / 16) + ((mProperty.nRow % 16) ? 1 : 0);
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mNumHUnits = (mProperty.nColumn / 16) + ((mProperty.nColumn % 16) ? 1 : 0);
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int size = mProperty.nColumn * mProperty.nRow * 3;
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if(size < 10240)
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size = 10240;
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try{
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mOBSP = new G4OutBitStream(size);
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WriteHeader();
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for(int yu=0; yu<mNumVUnits; yu++){
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for(int xu=0; xu<mNumHUnits; xu++){
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makeYCC(xu, yu);
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//mRgb->YCrCb
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#ifdef GRAY
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for(int i=0; i<64; i++)
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mCbBlock[i] = mCrBlock[i] = 0;
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#endif
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CodeMCU();
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}
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}
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WriteEOI();
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return M_NoError;
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}
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catch(G4MemoryError &me){
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return M_RuntimeError;
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}
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catch(G4BufferError &be){
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return M_RuntimeError;
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}
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catch(G4IndexError &ie){
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return M_RuntimeError;
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}
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}
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//MCU
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void
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G4JpegCoder::CodeMCU(void)
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{
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for(int n=0; n<4; n++){
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ForwardDCT(mYBlock[n]);
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Quantization(0);
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CodeHuffman(0);
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}
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ForwardDCT(mCbBlock);
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Quantization(1);
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CodeHuffman(1);
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ForwardDCT(mCrBlock);
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Quantization(2);
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CodeHuffman(2);
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}
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void
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G4JpegCoder::makeYCC(int ux, int uy)
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{
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u_char rv, gv, bv;
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int tCrBlock[4][64];
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int tCbBlock[4][64];
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for(int u=0; u<4; u++){
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int *yp = mYBlock[u];
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int *cbp = tCbBlock[u];
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int *crp = tCrBlock[u];
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int sx = ux * 16 + ((u&1) ? 8 : 0);
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int ex = sx + 8;
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int sy = uy * 16 + ((u>1) ? 8 : 0);
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int ey = sy + 8;
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for(int iv=sy; iv<ey; iv++){
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int ii = iv < mProperty.nRow ? iv : mProperty.nRow - 1;
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for(int ih=sx; ih<ex; ih++){
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int jj = ih < mProperty.nColumn ? ih : mProperty.nColumn - 1;
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int index = ii * mProperty.nColumn + jj;
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rv = mRgb[0][index];
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gv = mRgb[1][index];
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bv = mRgb[2][index];
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*yp++ = int((0.2990 * rv) + (0.5870 * gv) + (0.1140 * bv) - 128)
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;
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*cbp++ = int(-(0.1687 * rv) - (0.3313 * gv) + (0.5000 * bv));
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*crp++ = int((0.5000 * rv) - (0.4187 * gv) - (0.0813 * bv));
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} // ih
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} //iv
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} //u
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int n = 0;
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for(int b=0; b<4; b++){
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switch(b){
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case 0: n=0; break;
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case 1: n=4; break;
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case 2: n=32; break;
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case 3: n=36;
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}
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for(int y=0; y<8; y+=2){
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for(int x=0; x<8; x+=2){
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int idx = y * 8 + x;
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mCrBlock[n] = tCrBlock[b][idx];
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mCbBlock[n] = tCbBlock[b][idx];
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n++;
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}
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n += 4;
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}
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}
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}
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void
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G4JpegCoder::CodeHuffman(int cs)
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{
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const G4HuffmanCodeTable& dcT = cs ? CDcHuffmanT : YDcHuffmanT;
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const G4HuffmanCodeTable& acT = cs ? CAcHuffmanT : YAcHuffmanT;
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const int eobIdx = cs ? CEOBidx : YEOBidx;
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const int zrlIdx = cs ? CZRLidx : YZRLidx;
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int diff = mDCTData[0] - mPreDC[cs];
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mPreDC[cs] = mDCTData[0];
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int absDiff = std::abs(diff);
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int dIdx = 0;
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while(absDiff > 0){
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absDiff >>= 1;
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dIdx++;
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}
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if(dIdx > dcT.numOfElement)
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throw(G4IndexError(dcT.numOfElement, dIdx, "CodeHuffman:DC"));
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mOBSP->SetBits((dcT.CodeT)[dIdx], (dcT.SizeT)[dIdx]);
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if(dIdx){
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if(diff < 0)
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diff--;
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mOBSP->SetBits(diff, dIdx);
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}
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int run = 0;
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for(int n=1; n<64; n++){
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int absCoefficient = std::abs( mDCTData[ Zigzag[n] ] );
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if( absCoefficient ){
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while( run > 15 ){
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mOBSP->SetBits((acT.CodeT)[zrlIdx], (acT.SizeT)[zrlIdx]);
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run -= 16;
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}
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int s = 0;
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while( absCoefficient > 0 ){
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absCoefficient >>= 1;
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s++;
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}
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int aIdx = run * 10 + s + (run == 15);
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if( aIdx >= acT.numOfElement )
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throw( G4IndexError( acT.numOfElement, aIdx, "CodeHuffman:AC" )
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);
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mOBSP->SetBits( (acT.CodeT)[aIdx], (acT.SizeT)[aIdx] );
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int v = mDCTData[ Zigzag[n] ];
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if( v < 0 )
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v--;
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mOBSP->SetBits( v, s );
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run = 0;
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}
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else{
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if(n == 63)
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mOBSP->SetBits( (acT.CodeT)[eobIdx], (acT.SizeT)[eobIdx] );
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else
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run++;
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}
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}
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}
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void
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G4JpegCoder::Quantization(int cs)
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{
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int* qt = (int*)(cs ? CQuantumT : YQuantumT);
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for( int i=0; i<64; i++ ){
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mDCTData[i] /= qt[i];
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}
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}
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void
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G4JpegCoder::ForwardDCT(int* picData)
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{
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for( int v=0; v<8; v++ ){
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double cv = v ? 1.0 : DisSqrt2;
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for( int u=0; u<8; u++ ){
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double cu = u ? 1.0 : DisSqrt2;
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double sum = 0;
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for( int y=0; y<8; y++ )
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for( int x=0; x<8; x++ )
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sum += picData[ y * 8 + x ] * mCosT[u][x] * mCosT[v][y];
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mDCTData[ v * 8 + u ] = int( sum * cu * cv / 4 );
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}
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}
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}
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void
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G4JpegCoder::WriteHeader( void )
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{
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int i = 0; //counter
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//SOI
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mOBSP->SetByte( M_Marker ); //FF
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mOBSP->SetByte( M_SOI ); //SOI
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//APP0(JFIF Header)
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mOBSP->SetByte( M_Marker ); //FF
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mOBSP->SetByte( M_APP0 ); //APP0
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mOBSP->SetWord( JFIFLength ); //parameter
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mOBSP->CopyByte( (char*)JFIF, 5 ); //"JFIF\0"
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mOBSP->SetWord( JFIFVersion ); //Version
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mOBSP->SetByte( mProperty.Units );
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mOBSP->SetWord( mProperty.HDensity );
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mOBSP->SetWord( mProperty.VDensity );
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mOBSP->SetByte( 0 );
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mOBSP->SetByte( 0 );
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//comment
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if( mProperty.Comment != 0 ){
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mOBSP->SetByte( M_Marker ); //FF
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mOBSP->SetByte( M_COM ); //comment
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int length = strlen( mProperty.Comment ) + 1;
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mOBSP->SetWord( length + 2 );
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mOBSP->CopyByte( mProperty.Comment, length );
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}
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//DQT
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mOBSP->SetByte( M_Marker );
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mOBSP->SetByte( M_DQT );
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mOBSP->SetWord( 67 );
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mOBSP->SetByte( 0 );
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for( i=0; i<64; i++ )
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mOBSP->SetByte( u_char( YQuantumT[Zigzag[i]] ) );
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mOBSP->SetByte( M_Marker );
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mOBSP->SetByte( M_DQT );
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mOBSP->SetWord( 67 );
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mOBSP->SetByte( 1 );
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for( i=0; i<64; i++ )
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mOBSP->SetByte( u_char( CQuantumT[Zigzag[i]] ) );
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// DHT
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mOBSP->CopyByte( (char*)YDcDht, DcDhtLength );
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mOBSP->CopyByte( (char*)CDcDht, DcDhtLength );
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mOBSP->CopyByte( (char*)YAcDht, AcDhtLength );
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mOBSP->CopyByte( (char*)CAcDht, AcDhtLength );
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// Frame Header
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mOBSP->SetByte( M_Marker ); // FF
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mOBSP->SetByte( M_SOF0 );
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mOBSP->SetWord( 3 * mProperty.Dimension + 8 );
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mOBSP->SetByte( mProperty.SamplePrecision );
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mOBSP->SetWord( mProperty.nRow );
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mOBSP->SetWord( mProperty.nColumn );
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mOBSP->SetByte( mProperty.Dimension );
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mOBSP->SetByte( 0 );
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mOBSP->SetByte( YSampleF );
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mOBSP->SetByte( 0 );
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mOBSP->SetByte( 1 );
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mOBSP->SetByte( CSampleF );
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mOBSP->SetByte( 1 );
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mOBSP->SetByte( 2 );
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mOBSP->SetByte( CSampleF );
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mOBSP->SetByte( 1 );
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//Scan Header
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mOBSP->SetByte( M_Marker );
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mOBSP->SetByte( M_SOS );
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mOBSP->SetWord( 2 * mProperty.Dimension + 6 );
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mOBSP->SetByte( mProperty.Dimension );
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for( i=0; i<mProperty.Dimension; i++ ){
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mOBSP->SetByte( i );
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mOBSP->SetByte( i==0 ? 0 : 0x11 );
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}
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mOBSP->SetByte( 0 ); //Ss
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mOBSP->SetByte( 63 ); //Se
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mOBSP->SetByte( 0 ); //Ah,Al
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}
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//EOI
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void
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G4JpegCoder::WriteEOI( void )
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{
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mOBSP->SetByte( M_Marker );
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mOBSP->SetByte( M_EOI );
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}
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//SetJpegProperty
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void
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G4JpegCoder::SetJpegProperty(const G4JpegProperty& aProperty )
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{
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mProperty = aProperty;
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mProperty.Dimension = 3;
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mProperty.SamplePrecision = 8;
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mProperty.Format = 1;
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mProperty.MajorRevisions = 1;
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mProperty.MinorRevisions = 2;
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mProperty.HThumbnail = 0;
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mProperty.VThumbnail = 0;
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}
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