/*
 * $Id: j2kheader_manager.c 1034 2011-11-01 23:28:07Z antonin $
 *
 * Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
 * Copyright (c) 2002-2011, Professor Benoit Macq
 * Copyright (c) 2010-2011, Kaori Hagihara 
 * Copyright (c) 2011,      Lucian Corlaciu, GSoC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "j2kheader_manager.h"

#ifdef SERVER
#include "fcgi_stdio.h"
#define logstream FCGI_stdout
#else
#define FCGI_stdout stdout
#define FCGI_stderr stderr
#define logstream stderr
#endif //SERVER


SIZmarker_param_t get_SIZmkrdata_from_j2kstream( Byte_t *SIZstream);
CODmarker_param_t get_CODmkrdata_from_j2kstream( Byte_t *CODstream);

bool get_mainheader_from_j2kstream( Byte_t *j2kstream, SIZmarker_param_t *SIZ, CODmarker_param_t *COD)
{
  if( *j2kstream++ != 0xff || *j2kstream++ != 0x4f){
    fprintf( FCGI_stderr, "Error, j2kstream is not starting with SOC marker\n");
    return false;
  }
  
  if( SIZ){
    *SIZ = get_SIZmkrdata_from_j2kstream( j2kstream);
    if( SIZ->Lsiz == 0)
      return false;

    j2kstream += (SIZ->Lsiz+2);
  }

  if( COD){
    if( !SIZ)
      j2kstream += (big2( j2kstream+2) + 2);
    
    *COD = get_CODmkrdata_from_j2kstream( j2kstream);
    if( COD->Lcod == 0)
      return false;
  }
  return true;
}

SIZmarker_param_t get_SIZmkrdata_from_j2kstream( Byte_t *SIZstream)
{
  SIZmarker_param_t SIZ ={0};
  int i;

  if( *SIZstream++ != 0xff || *SIZstream++ != 0x51){
    fprintf( FCGI_stderr, "Error, SIZ marker not found in the reconstructed j2kstream\n");
    return SIZ;
  }

  SIZ.Lsiz   = big2( SIZstream);
  SIZ.Rsiz   = big2( SIZstream+2);
  SIZ.Xsiz   = big4( SIZstream+4);
  SIZ.Ysiz   = big4( SIZstream+8);
  SIZ.XOsiz  = big4( SIZstream+12);
  SIZ.YOsiz  = big4( SIZstream+16);
  SIZ.XTsiz  = big4( SIZstream+20);
  SIZ.YTsiz  = big4( SIZstream+24);
  SIZ.XTOsiz = big4( SIZstream+28);
  SIZ.YTOsiz = big4( SIZstream+32);
  SIZ.Csiz   = big2( SIZstream+36);

  SIZ.XTnum  = ( SIZ.Xsiz-SIZ.XTOsiz+SIZ.XTsiz-1)/SIZ.XTsiz;
  SIZ.YTnum  = ( SIZ.Ysiz-SIZ.YTOsiz+SIZ.YTsiz-1)/SIZ.YTsiz;

  for( i=0; i<(int)SIZ.Csiz; i++){
    SIZ.Ssiz[i]  = *(SIZstream+(38+i*3));
    SIZ.XRsiz[i] = *(SIZstream+(39+i*3));
    SIZ.YRsiz[i] = *(SIZstream+(40+i*3));
  }

  return SIZ;
}

CODmarker_param_t get_CODmkrdata_from_j2kstream( Byte_t *CODstream)
{
  CODmarker_param_t COD;
  int i;

  if( *CODstream++ != 0xff || *CODstream++ != 0x52){
    fprintf( FCGI_stderr, "Error, COD marker not found in the reconstructed j2kstream\n");
    return COD;
  }
  
  COD.Lcod = big2( CODstream);
  COD.Scod = *( CODstream+2);
  COD.prog_order = *( CODstream+3);
  COD.numOflayers = big2( CODstream+4);
  COD.numOfdecomp = *( CODstream+7);

  if(COD.Scod & 0x01){
    COD.XPsiz = (Byte4_t *)malloc( (COD.numOfdecomp+1)*sizeof(Byte4_t));
    COD.YPsiz = (Byte4_t *)malloc( (COD.numOfdecomp+1)*sizeof(Byte4_t));
    
    for( i=0; i<=COD.numOfdecomp; i++){
      //precinct size
      COD.XPsiz[i] = pow( 2, *( CODstream+12+i) & 0x0F);
      COD.YPsiz[i] = pow( 2, (*( CODstream+12+i) & 0xF0) >> 4);
    }
  }
  else{
    COD.XPsiz = (Byte4_t *)malloc( sizeof(Byte4_t));
    COD.YPsiz = (Byte4_t *)malloc( sizeof(Byte4_t));
    COD.XPsiz[0] = COD.YPsiz[0] = pow(2,15);
  }
  return COD;
}


bool modify_SIZmkrstream( SIZmarker_param_t SIZ, int difOfdecomplev, Byte_t *SIZstream);
Byte2_t modify_CODmkrstream( CODmarker_param_t COD, int numOfdecomp, Byte_t *CODstream);

bool modify_mainheader( Byte_t *j2kstream, int numOfdecomp, SIZmarker_param_t SIZ, CODmarker_param_t COD, Byte8_t *j2klen)
{
  Byte2_t newLcod;

  if( *j2kstream++ != 0xff || *j2kstream++ != 0x4f){
    fprintf( FCGI_stderr, "Error, j2kstream is not starting with SOC marker\n");
    return false;
  }

  if(!modify_SIZmkrstream( SIZ, COD.numOfdecomp-numOfdecomp, j2kstream))
    return false;
  
  j2kstream += SIZ.Lsiz+2;
  if( !(newLcod = modify_CODmkrstream( COD, numOfdecomp, j2kstream)))
    return false;

  memmove( j2kstream+2+newLcod, j2kstream+2+COD.Lcod, (*j2klen)-(SIZ.Lsiz+COD.Lcod+6));
  *j2klen -= ( COD.Lcod - newLcod);
  
  return true;
}

bool modify_SIZmkrstream( SIZmarker_param_t SIZ, int difOfdecomplev, Byte_t *SIZstream)
{
  int i;
  
  if( *SIZstream++ != 0xff || *SIZstream++ != 0x51){
    fprintf( FCGI_stderr, "Error, SIZ marker not found in the reconstructed j2kstream\n");
    return false;
  }
    
  for( i=0; i<difOfdecomplev; i++){
    SIZ.Xsiz   = ceil( (double)SIZ.Xsiz/2.0);
    SIZ.Ysiz   = ceil( (double)SIZ.Ysiz/2.0);
    SIZ.XOsiz  = ceil( (double)SIZ.XOsiz/2.0);
    SIZ.YOsiz  = ceil( (double)SIZ.YOsiz/2.0);
    SIZ.XTsiz  = ceil( (double)SIZ.XTsiz/2.0);
    SIZ.YTsiz  = ceil( (double)SIZ.YTsiz/2.0);
    SIZ.XTOsiz = ceil( (double)SIZ.XTOsiz/2.0);
    SIZ.YTOsiz = ceil( (double)SIZ.YTOsiz/2.0);
  }

  SIZstream += 4; // skip Lsiz + Rsiz

  modify_4Bytecode( SIZ.Xsiz,   SIZstream);
  modify_4Bytecode( SIZ.Ysiz,   SIZstream+4);
  modify_4Bytecode( SIZ.XOsiz,  SIZstream+8);
  modify_4Bytecode( SIZ.YOsiz,  SIZstream+12);
  modify_4Bytecode( SIZ.XTsiz,  SIZstream+16);
  modify_4Bytecode( SIZ.YTsiz,  SIZstream+20);
  modify_4Bytecode( SIZ.XTOsiz, SIZstream+24);
  modify_4Bytecode( SIZ.YTOsiz, SIZstream+28);

  return true;
}

Byte2_t modify_CODmkrstream( CODmarker_param_t COD, int numOfdecomp, Byte_t *CODstream)
{
  Byte2_t newLcod;

  if( *CODstream++ != 0xff || *CODstream++ != 0x52){
    fprintf( FCGI_stderr, "Error, COD marker not found in the reconstructed j2kstream\n");
    return 0;
  }
  
  if( COD.Scod & 0x01){
    newLcod  = 13+numOfdecomp;

    *CODstream++ = (Byte_t)((Byte2_t)(newLcod & 0xff00) >> 8);
    *CODstream++ = (Byte_t)(newLcod & 0x00ff);
  }
  else{
    newLcod = COD.Lcod;
    CODstream += 2;
  }
  
  CODstream += 5; // skip Scod & SGcod
  
  // SPcod
  *CODstream++ = (Byte_t) numOfdecomp;
  
  return newLcod;
}

bool modify_COCmkrstream( int numOfdecomp, Byte_t *COCstream, Byte2_t Csiz, Byte2_t *oldLcoc, Byte2_t *newLcoc);

bool modify_tileheader( Byte_t *j2kstream, Byte8_t SOToffset, int numOfdecomp, Byte2_t Csiz, Byte8_t *j2klen)
{
  Byte4_t Psot; // tile part length ref A.4.2 Start of tile-part SOT
  Byte_t *thstream, *SOTstream, *Psot_stream;
  Byte2_t oldLcoc, newLcoc;
  
  SOTstream = thstream = j2kstream+SOToffset;
  
  if( *SOTstream++ != 0xff || *SOTstream++ != 0x90){
    fprintf( FCGI_stderr, "Error, thstream is not starting with SOT marker\n");
    return false;
  }

  SOTstream += 4; // skip Lsot & Isot
  Psot = (SOTstream[0]<<24)+(SOTstream[1]<<16)+(SOTstream[2]<<8)+(SOTstream[3]);
  Psot_stream = SOTstream;
  
  thstream += 12; // move to next marker (SOT always 12bytes)
  
  while( !( *thstream == 0xff && *(thstream+1) == 0x93)){ // search SOD
    if( numOfdecomp != -1 && *thstream == 0xff && *(thstream+1) == 0x53){ // COC
      if( !modify_COCmkrstream( numOfdecomp, thstream, Csiz, &oldLcoc, &newLcoc))
	return false;
      
      memmove( thstream+newLcoc+2, thstream+oldLcoc+2, (*j2klen)-(thstream-j2kstream+oldLcoc+2));
      *j2klen -= ( oldLcoc - newLcoc);
    }
    thstream += 2;
    thstream += ((thstream[0]<<8)+(thstream[1])); // marker length
  }

  if( (*j2klen)-SOToffset != Psot){
    Psot = (*j2klen)-SOToffset;
    modify_4Bytecode( Psot, Psot_stream);
  }
  return true;
}

bool modify_COCmkrstream( int numOfdecomp, Byte_t *COCstream, Byte2_t Csiz, Byte2_t *oldLcoc, Byte2_t *newLcoc)
{
  if( *COCstream++ != 0xff || *COCstream++ != 0x53){
    fprintf( FCGI_stderr, "Error, COC marker not found in the reconstructed j2kstream\n");
    return false;
  }
  
  *oldLcoc = big2( COCstream);
  *newLcoc = (Csiz < 257 ? 10 : 11) + numOfdecomp;
  *COCstream++ = (Byte_t)((Byte2_t)((*newLcoc) & 0xff00) >> 8);
  *COCstream++ = (Byte_t)((*newLcoc) & 0x00ff);
      
  if( Csiz < 257) COCstream +=2; // skip Ccoc & Scoc
  else COCstream += 3;
      
  *COCstream = numOfdecomp;
  
  return true;
}
