
/*!
 ***********************************************************************
 *  \mainpage
 *     This is the H.264/AVC decoder reference software. For detailed documentation
 *     see the comments in each file.
 *
 *  \author
 *     The main contributors are listed in contributors.h
 *
 *  \version
 *     JM 9.5 (FRExt)
 *
 *  \note
 *     tags are used for document system "doxygen"
 *     available at http://www.doxygen.org
 */
/*!
 *  \file
 *     ldecod.c
 *  \brief
 *     H.264/AVC reference decoder project main()
 *  \author
 *     Main contributors (see contributors.h for copyright, address and affiliation details)
 *     - Inge Lille-Langøy       <inge.lille-langoy@telenor.com>
 *     - Rickard Sjoberg         <rickard.sjoberg@era.ericsson.se>
 *     - Stephan Wenger          <stewe@cs.tu-berlin.de>
 *     - Jani Lainema            <jani.lainema@nokia.com>
 *     - Sebastian Purreiter     <sebastian.purreiter@mch.siemens.de>
 *     - Byeong-Moon Jeon        <jeonbm@lge.com>
 *     - Gabi Blaettermann       <blaetter@hhi.de>
 *     - Ye-Kui Wang             <wyk@ieee.org>
 *     - Valeri George           <george@hhi.de>
 *     - Karsten Suehring        <suehring@hhi.de>
 *
 ***********************************************************************
 */

#include "contributors.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <sys/timeb.h>

#if defined WIN32
  #include <io.h>
#else
  #include <unistd.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>


#include <assert.h>

#include "global.h"
#include "rtp.h"
#include "memalloc.h"
#include "mbuffer.h"
#include "leaky_bucket.h"
#include "fmo.h"
#include "annexb.h"
#include "output.h"
#include "cabac.h"

#include "erc_api.h"

#define JM          "9 (FRExt)"
#define VERSION     "9.5"
#define EXT_VERSION "(FRExt)"

#define LOGFILE     "log.dec"
#define DATADECFILE "dataDec.txt"
#define TRACEFILE   "trace_dec.txt"

extern objectBuffer_t *erc_object_list;
extern ercVariables_t *erc_errorVar;
extern ColocatedParams *Co_located;
#ifdef	JFVM444	// 2006.01.06 Add Melco
extern ColocatedParams *Co_located_JF[MAX_PLANE];
#endif	// JFVM444

// I have started to move the inp and img structures into global variables.
// They are declared in the following lines.  Since inp is defined in conio.h
// and cannot be overridden globally, it is defined here as input
//
// Everywhere, input-> and img-> can now be used either globally or with
// the local override through the formal parameter mechanism

extern FILE* bits;
extern StorablePicture* dec_picture;

struct inp_par    *input;       //!< input parameters from input configuration file
struct snr_par    *snr;         //!< statistics
struct img_par    *img;         //!< image parameters

int global_init_done = 0;

/*!
 ***********************************************************************
 * \brief
 *   print help message and exit
 ***********************************************************************
 */
void JMDecHelpExit ()
{
  fprintf( stderr, "\n   ldecod [-h] {[defdec.cfg] | {[-i bitstream.264]...[-o output.yuv] [-r reference.yuv] [-uv]}}\n\n"    
    "## Parameters\n\n"

    "## Options\n"
    "   -h  :  prints function usage\n"
    "       :  parse <defdec.cfg> for decoder operation.\n"
    "   -i  :  Input file name. \n"
    "   -o  :  Output file name. If not specified default output is set as test_dec.yuv\n\n"
    "   -r  :  Reference file name. If not specified default output is set as test_rec.yuv\n\n"
    "   -uv :  write chroma components for monochrome streams(4:2:0)\n\n"
    
    "## Supported video file formats\n"
    "   Input : .264 -> H.264 bitstream files. \n"
    "   Output: .yuv -> RAW file. Format depends on bitstream information. \n\n"
    
    "## Examples of usage:\n"
    "   ldecod\n"
    "   ldecod  -h\n"
    "   ldecod  default.cfg\n"
    "   ldecod  -i bitstream.264 -o output.yuv -r reference.yuv\n");

  exit(-1);
}


void Configure(int ac, char *av[])
{
  int CLcount;
  char *config_filename=NULL;
  CLcount = 1;

  
  strcpy(input->infile,"test.264");      //! set default bitstream name
  strcpy(input->outfile,"test_dec.yuv"); //! set default output file name
  strcpy(input->reffile,"test_rec.yuv"); //! set default reference file name
  input->FileFormat = PAR_OF_ANNEXB;
  input->ref_offset=0;
  input->poc_scale=1;

#ifdef _LEAKYBUCKET_
  input->R_decoder=500000;          //! Decoder rate
  input->B_decoder=104000;          //! Decoder buffer size
  input->F_decoder=73000;           //! Decoder initial delay
  strcpy(input->LeakyBucketParamFile,"leakybucketparam.cfg");    // file where Leaky Bucket params (computed by encoder) are stored
#endif

  if (ac==2)
  {
    if (0 == strncmp (av[1], "-h", 2))
    {
      JMDecHelpExit();
    }
    else
    {
      config_filename=av[1];
      init_conf(input, av[1]);
    }
    CLcount=2;
  }
  
  if (ac>=3)
  {
    if (0 == strncmp (av[1], "-i", 2))
    {
      strcpy(input->infile,av[2]);
      CLcount = 3;
    }
    if (0 == strncmp (av[1], "-h", 2))
    {
      JMDecHelpExit();
    }
  }
  
  // Parse the command line
 
  while (CLcount < ac)
  {
    if (0 == strncmp (av[CLcount], "-h", 2))
    {
      JMDecHelpExit();
    }
    
    if (0 == strncmp (av[CLcount], "-i", 2))  //! Input file
    {
      strcpy(input->infile,av[CLcount+1]);      
      CLcount += 2;
    } 
    else if (0 == strncmp (av[CLcount], "-o", 2))  //! Output File
    {
      strcpy(input->outfile,av[CLcount+1]);
      CLcount += 2;
    }
    else if (0 == strncmp (av[CLcount], "-r", 2))  //! Reference File
    {
      strcpy(input->reffile,av[CLcount+1]);
      CLcount += 2;
    }
    else if (0 == strncmp (av[CLcount], "-uv", 2))  //! indicate UV writing for 4:0:0
    {
      input->write_uv = 1;
      CLcount ++;
    }
    else
    {
      //config_filename=av[CLcount];
      //init_conf(input, config_filename);
      snprintf(errortext, ET_SIZE, "Invalid syntax. Use ldecod -h for proper usage");
      error(errortext, 300);
    }
  }


#if TRACE
  if ((p_trace=fopen(TRACEFILE,"w"))==0)             // append new statistic at the end
  {
    snprintf(errortext, ET_SIZE, "Error open file %s!",TRACEFILE);
    error(errortext,500);
  }
#endif


  if ((p_out=open(input->outfile, OPENFLAGS_WRITE, OPEN_PERMISSIONS))==-1)
  {
    snprintf(errortext, ET_SIZE, "Error open file %s ",input->outfile);
    error(errortext,500);
  }
/*  if ((p_out2=fopen("out.yuv","wb"))==0)
  {
    snprintf(errortext, ET_SIZE, "Error open file %s ",input->outfile);
    error(errortext,500);
  }*/


  fprintf(stdout,"----------------------------- JM %s %s -----------------------------\n", VERSION, EXT_VERSION);
  fprintf(stdout," Decoder config file                    : %s \n",config_filename);
  fprintf(stdout,"--------------------------------------------------------------------------\n");
  fprintf(stdout," Input H.264 bitstream                  : %s \n",input->infile);
  fprintf(stdout," Output decoded YUV                     : %s \n",input->outfile);
  fprintf(stdout," Output status file                     : %s \n",LOGFILE);
  if ((p_ref=open(input->reffile,OPENFLAGS_READ))==-1)
  {
    fprintf(stdout," Input reference file                   : %s does not exist \n",input->reffile);
    fprintf(stdout,"                                          SNR values are not available\n");
  }
  else
    fprintf(stdout," Input reference file                   : %s \n",input->reffile);

  fprintf(stdout,"--------------------------------------------------------------------------\n");
#ifdef _LEAKYBUCKET_
  fprintf(stdout," Rate_decoder        : %8ld \n",input->R_decoder);
  fprintf(stdout," B_decoder           : %8ld \n",input->B_decoder);
  fprintf(stdout," F_decoder           : %8ld \n",input->F_decoder);
  fprintf(stdout," LeakyBucketParamFile: %s \n",input->LeakyBucketParamFile); // Leaky Bucket Param file
  calc_buffer(input);
  fprintf(stdout,"--------------------------------------------------------------------------\n");
#endif
  fprintf(stdout,"POC must = frame# or field# for SNRs to be correct\n");
  fprintf(stdout,"--------------------------------------------------------------------------\n");
  fprintf(stdout,"  Frame       POC   Pic#   QP   SnrY    SnrU    SnrV   Y:U:V  Time(ms)\n");
  fprintf(stdout,"--------------------------------------------------------------------------\n");
  
}

/*!
 ***********************************************************************
 * \brief
 *    main function for TML decoder
 ***********************************************************************
 */
int main(int argc, char **argv)
{
#ifdef	JFVM444	// 2006.01.06 Add Melco
  int nplane;
#endif	// JFVM444
  // allocate memory for the structures
  if ((input =  (struct inp_par *)calloc(1, sizeof(struct inp_par)))==NULL) no_mem_exit("main: input");
  if ((snr   =  (struct snr_par *)calloc(1, sizeof(struct snr_par)))==NULL) no_mem_exit("main: snr");
  if ((img   =  (struct img_par *)calloc(1, sizeof(struct img_par)))==NULL) no_mem_exit("main: img");

  Configure (argc, argv);

  init_old_slice();

  switch (input->FileFormat)
  {
  case 0:
    OpenBitstreamFile (input->infile);
    break;
  case 1:
    OpenRTPFile (input->infile);
    break;
  default:
    printf ("Unsupported file format %d, exit\n", input->FileFormat);
  }

  // Allocate Slice data struct
  malloc_slice(input,img);

  init(img);

  dec_picture = NULL;

  dpb.init_done = 0;
  g_nFrame = 0;

  init_out_buffer();

  img->idr_psnr_number=input->ref_offset;
  img->psnr_number=0;

  img->number=0;
  img->type = I_SLICE;
  img->dec_ref_pic_marking_buffer = NULL;

  // B pictures
  Bframe_ctr=snr->frame_ctr=0;

  // time for total decoding session
  tot_time = 0;
  while (decode_one_frame(img, input, snr) != EOS)
    ;
 report(input, img, snr);
  free_slice(input,img);
  FmoFinit();
  free_global_buffers();

  flush_dpb();

#ifdef PAIR_FIELDS_IN_OUTPUT
  flush_pending_output(p_out);
#endif

  CloseBitstreamFile();

  close(p_out);
//  fclose(p_out2);
  if (p_ref!=-1)
    close(p_ref);
#if TRACE
  fclose(p_trace);
#endif

  ercClose(erc_errorVar);

  free_dpb();
  uninit_out_buffer();

#ifdef	JFVM444	// 2006.01.06 Change Melco
  for( nplane=0; nplane<MAX_PLANE; nplane++ )
  {
    free_colocated(Co_located_JF[nplane]);   
  }
#else	// JFVM444
  free_colocated(Co_located);
#endif	// JFVM444
  free (input);
  free (snr);
  free (img);
  
  //while( !kbhit() ); 
  return 0;
}


/*!
 ***********************************************************************
 * \brief
 *    Initilize some arrays
 ***********************************************************************
 */
void init(struct img_par *img)  //!< image parameters
{
  img->oldFrameSizeInMbs = -1;

  imgY_ref  = NULL;
  imgUV_ref = NULL;
}

/*!
 ***********************************************************************
 * \brief
 *    Initilize FREXT variables
 ***********************************************************************
 */
void init_frext(struct img_par *img)  //!< image parameters
{
  //pel bitdepth init
  img->bitdepth_luma_qp_scale   = 6*(img->bitdepth_luma   - 8);
  if(img->bitdepth_luma > img->bitdepth_chroma || active_sps->chroma_format_idc == YUV400)
    img->pic_unit_bitsize_on_disk = (img->bitdepth_luma > 8)? 16:8;
  else
    img->pic_unit_bitsize_on_disk = (img->bitdepth_chroma > 8)? 16:8;
  img->dc_pred_value = 1<<(img->bitdepth_luma - 1);
  img->max_imgpel_value = (1<<img->bitdepth_luma) - 1;

  if (active_sps->chroma_format_idc != YUV400)
  {
    //for chrominance part
    img->bitdepth_chroma_qp_scale = 6*(img->bitdepth_chroma - 8);
    img->max_imgpel_value_uv      = (1<<img->bitdepth_chroma) - 1;
    img->num_blk8x8_uv = (1<<active_sps->chroma_format_idc)&(~(0x1));
    img->num_cdc_coeff = img->num_blk8x8_uv<<1;
    img->mb_cr_size_x  = (active_sps->chroma_format_idc==YUV420 || active_sps->chroma_format_idc==YUV422)? 8:16;
    img->mb_cr_size_y  = (active_sps->chroma_format_idc==YUV444 || active_sps->chroma_format_idc==YUV422)? 16:8;

    // Residue Color Transform
    if(img->residue_transform_flag)
      img->bitdepth_chroma_qp_scale += 6;
  }
  else
  {
    img->bitdepth_chroma_qp_scale = 0;
    img->max_imgpel_value_uv      = 0;
    img->num_blk8x8_uv = 0;
    img->num_cdc_coeff = 0;
    img->mb_cr_size_x  = 0;
    img->mb_cr_size_y  = 0;
  }

}


/*!
 ************************************************************************
 * \brief
 *    Read input from configuration file
 *
 * \par Input:
 *    Name of configuration filename
 *
 * \par Output
 *    none
 ************************************************************************
 */
void init_conf(struct inp_par *inp, char *config_filename)
{
  FILE *fd;
  int NAL_mode;

  // read the decoder configuration file
  if((fd=fopen(config_filename,"r")) == NULL)
  {
    snprintf(errortext, ET_SIZE, "Error: Control file %s not found\n",config_filename);
    error(errortext, 300);
  }

  fscanf(fd,"%s",inp->infile);                // H.264 compressed input bitstream
  fscanf(fd,"%*[^\n]");

  fscanf(fd,"%s",inp->outfile);               // RAW (YUV/RGB) output file
  fscanf(fd,"%*[^\n]");

  fscanf(fd,"%s",inp->reffile);               // reference file
  fscanf(fd,"%*[^\n]");

  fscanf(fd,"%d",&(inp->write_uv));           // write UV in YUV 4:0:0 mode
  fscanf(fd,"%*[^\n]");
  
  fscanf(fd,"%d",&(NAL_mode));                // NAL mode
  fscanf(fd,"%*[^\n]");

  switch(NAL_mode)
  {
  case 0:
    inp->FileFormat = PAR_OF_ANNEXB;
    break;
  case 1:
    inp->FileFormat = PAR_OF_RTP;
    break;
  default:
    snprintf(errortext, ET_SIZE, "NAL mode %i is not supported", NAL_mode);
    error(errortext,400);
  }

  fscanf(fd,"%d,",&inp->ref_offset);   // offset used for SNR computation
  fscanf(fd,"%*[^\n]");

  fscanf(fd,"%d,",&inp->poc_scale);   // offset used for SNR computation
  fscanf(fd,"%*[^\n]");


  if (inp->poc_scale < 1 || inp->poc_scale > 10)
  {
    snprintf(errortext, ET_SIZE, "Poc Scale is %d. It has to be within range 1 to 10",inp->poc_scale);
    error(errortext,1);
  }

  inp->write_uv=1;

#ifdef _LEAKYBUCKET_
  fscanf(fd,"%ld,",&inp->R_decoder);             // Decoder rate
  fscanf(fd, "%*[^\n]");
  fscanf(fd,"%ld,",&inp->B_decoder);             // Decoder buffer size
  fscanf(fd, "%*[^\n]");
  fscanf(fd,"%ld,",&inp->F_decoder);             // Decoder initial delay
  fscanf(fd, "%*[^\n]"); 
  fscanf(fd,"%s",inp->LeakyBucketParamFile);    // file where Leaky Bucket params (computed by encoder) are stored
  fscanf(fd,"%*[^\n]");
#endif

  fclose (fd);

}

/*!
 ************************************************************************
 * \brief
 *    Reports the gathered information to appropriate outputs
 *
 * \par Input:
 *    struct inp_par *inp,
 *    struct img_par *img,
 *    struct snr_par *stat
 *
 * \par Output:
 *    None
 ************************************************************************
 */
void report(struct inp_par *inp, struct img_par *img, struct snr_par *snr)
{
  #define OUTSTRING_SIZE 255
  char string[OUTSTRING_SIZE];
  FILE *p_log;
  char yuv_formats[4][4]= { {"400"}, {"420"}, {"422"}, {"444"} };

#ifndef WIN32
  time_t  now;
  struct tm *l_time;
#else
  char timebuf[128];
#endif

  fprintf(stdout,"-------------------- Average SNR all frames ------------------------------\n");
  fprintf(stdout," SNR Y(dB)           : %5.2f\n",snr->snr_ya);
  fprintf(stdout," SNR U(dB)           : %5.2f\n",snr->snr_ua);
  fprintf(stdout," SNR V(dB)           : %5.2f\n",snr->snr_va);
  fprintf(stdout," Total decoding time : %.3f sec \n",tot_time*0.001);
  fprintf(stdout,"--------------------------------------------------------------------------\n");
  fprintf(stdout," Exit JM %s decoder, ver %s ",JM, VERSION);
  fprintf(stdout,"\n");
  // write to log file

  snprintf(string, OUTSTRING_SIZE, "%s", LOGFILE);
  if ((p_log=fopen(string,"r"))==0)                    // check if file exist
  {
    if ((p_log=fopen(string,"a"))==0)
    {
      snprintf(errortext, ET_SIZE, "Error open file %s for appending",string);
      error(errortext, 500);
    }
    else                                              // Create header to new file
    {
      fprintf(p_log," -------------------------------------------------------------------------------------------------------------------\n");
      fprintf(p_log,"|  Decoder statistics. This file is made first time, later runs are appended               |\n");
      fprintf(p_log," ------------------------------------------------------------------------------------------------------------------- \n");
      fprintf(p_log,"|   ver  | Date  | Time  |    Sequence        |#Img| Format  | YUV |Coding|SNRY 1|SNRU 1|SNRV 1|SNRY N|SNRU N|SNRV N|\n");
      fprintf(p_log," -------------------------------------------------------------------------------------------------------------------\n");
    }
  }
  else
  { 
    fclose(p_log);
    p_log=fopen(string,"a");                    // File exist,just open for appending
  }

  fprintf(p_log,"|%s/%-4s", VERSION, EXT_VERSION);
  
#ifdef WIN32
  _strdate( timebuf );
  fprintf(p_log,"| %1.5s |",timebuf );

  _strtime( timebuf);
  fprintf(p_log," % 1.5s |",timebuf);
#else
  now = time ((time_t *) NULL); // Get the system time and put it into 'now' as 'calender time'
  time (&now);
  l_time = localtime (&now);
  strftime (string, sizeof string, "%d-%b-%Y", l_time);
  fprintf(p_log,"| %1.5s |",string );

  strftime (string, sizeof string, "%H:%M:%S", l_time);
  fprintf(p_log,"| %1.5s |",string );
#endif

  fprintf(p_log,"%20.20s|",inp->infile);

  fprintf(p_log,"%3d |",img->number);
  fprintf(p_log,"%4dx%-4d|", img->width, img->height);
  fprintf(p_log," %s |", &(yuv_formats[img->yuv_format][0]));

  if (active_pps->entropy_coding_mode_flag == UVLC)
    fprintf(p_log," CAVLC|");
  else
    fprintf(p_log," CABAC|");


  fprintf(p_log,"%6.3f|",snr->snr_y1);
  fprintf(p_log,"%6.3f|",snr->snr_u1);
  fprintf(p_log,"%6.3f|",snr->snr_v1);
  fprintf(p_log,"%6.3f|",snr->snr_ya);
  fprintf(p_log,"%6.3f|",snr->snr_ua);
  fprintf(p_log,"%6.3f|\n",snr->snr_va);

  fclose(p_log);

  snprintf(string, OUTSTRING_SIZE,"%s", DATADECFILE);
  p_log=fopen(string,"a");

  if(Bframe_ctr != 0) // B picture used
  {
    fprintf(p_log, "%3d %2d %2d %2.2f %2.2f %2.2f %5d "
      "%2.2f %2.2f %2.2f %5d "
      "%2.2f %2.2f %2.2f %5d %.3f\n",
      img->number, 0, img->qp,
      snr->snr_y1,
      snr->snr_u1,
      snr->snr_v1,
      0,
      0.0,
      0.0,
      0.0,
      0,
      snr->snr_ya,
      snr->snr_ua,
      snr->snr_va,
      0,
      (double)0.001*tot_time/(img->number+Bframe_ctr-1));
  }
  else
  {
    fprintf(p_log, "%3d %2d %2d %2.2f %2.2f %2.2f %5d "
      "%2.2f %2.2f %2.2f %5d "
      "%2.2f %2.2f %2.2f %5d %.3f\n",
      img->number, 0, img->qp,
      snr->snr_y1,
      snr->snr_u1,
      snr->snr_v1,
      0,
      0.0,
      0.0,
      0.0,
      0,
      snr->snr_ya,
      snr->snr_ua,
      snr->snr_va,
      0,
      (double)0.001*tot_time/img->number);
  }
  fclose(p_log);
}

/*!
 ************************************************************************
 * \brief
 *    Allocates a stand-alone partition structure.  Structure should
 *    be freed by FreePartition();
 *    data structures
 *
 * \par Input:
 *    n: number of partitions in the array
 * \par return
 *    pointer to DataPartition Structure, zero-initialized
 ************************************************************************
 */

DataPartition *AllocPartition(int n)
{
  DataPartition *partArr, *dataPart;
  int i;

  partArr = (DataPartition *) calloc(n, sizeof(DataPartition));
  if (partArr == NULL)
  {
    snprintf(errortext, ET_SIZE, "AllocPartition: Memory allocation for Data Partition failed");
    error(errortext, 100);
  }

  for (i=0; i<n; i++) // loop over all data partitions
  {
    dataPart = &(partArr[i]);
    dataPart->bitstream = (Bitstream *) calloc(1, sizeof(Bitstream));
    if (dataPart->bitstream == NULL)
    {
      snprintf(errortext, ET_SIZE, "AllocPartition: Memory allocation for Bitstream failed");
      error(errortext, 100);
    }
    dataPart->bitstream->streamBuffer = (byte *) calloc(MAX_CODED_FRAME_SIZE, sizeof(byte));
    if (dataPart->bitstream->streamBuffer == NULL)
    {
      snprintf(errortext, ET_SIZE, "AllocPartition: Memory allocation for streamBuffer failed");
      error(errortext, 100);
    }
  }
  return partArr;
}




/*!
 ************************************************************************
 * \brief
 *    Frees a partition structure (array).  
 *
 * \par Input:
 *    Partition to be freed, size of partition Array (Number of Partitions)
 *
 * \par return
 *    None
 *
 * \note
 *    n must be the same as for the corresponding call of AllocPartition
 ************************************************************************
 */


void FreePartition (DataPartition *dp, int n)
{
  int i;

  assert (dp != NULL);
  assert (dp->bitstream != NULL);
  assert (dp->bitstream->streamBuffer != NULL);
  for (i=0; i<n; i++)
  {
    free (dp[i].bitstream->streamBuffer);
    free (dp[i].bitstream);
  }
  free (dp);
}


/*!
 ************************************************************************
 * \brief
 *    Allocates the slice structure along with its dependent
 *    data structures
 *
 * \par Input:
 *    Input Parameters struct inp_par *inp,  struct img_par *img
 ************************************************************************
 */
void malloc_slice(struct inp_par *inp, struct img_par *img)
{
  Slice *currSlice;

  img->currentSlice = (Slice *) calloc(1, sizeof(Slice));
  if ( (currSlice = img->currentSlice) == NULL)
  {
    snprintf(errortext, ET_SIZE, "Memory allocation for Slice datastruct in NAL-mode %d failed", inp->FileFormat);
    error(errortext,100);
  }
//  img->currentSlice->rmpni_buffer=NULL;
  //! you don't know whether we do CABAC hre, hence initialize CABAC anyway
  // if (inp->symbol_mode == CABAC)
  if (1)
  {
    // create all context models
    currSlice->mot_ctx = create_contexts_MotionInfo();
    currSlice->tex_ctx = create_contexts_TextureInfo();
  }
  currSlice->max_part_nr = 3;  //! assume data partitioning (worst case) for the following mallocs()
  currSlice->partArr = AllocPartition(currSlice->max_part_nr);
}


/*!
 ************************************************************************
 * \brief
 *    Memory frees of the Slice structure and of its dependent
 *    data structures
 *
 * \par Input:
 *    Input Parameters struct inp_par *inp,  struct img_par *img
 ************************************************************************
 */
void free_slice(struct inp_par *inp, struct img_par *img)
{
  Slice *currSlice = img->currentSlice;

  FreePartition (currSlice->partArr, 3);
//      if (inp->symbol_mode == CABAC)
  if (1)
  {
    // delete all context models
    delete_contexts_MotionInfo(currSlice->mot_ctx);
    delete_contexts_TextureInfo(currSlice->tex_ctx);
  }
  free(img->currentSlice);

  currSlice = NULL;
}

/*!
 ************************************************************************
 * \brief
 *    Dynamic memory allocation of frame size related global buffers
 *    buffers are defined in global.h, allocated memory must be freed in
 *    void free_global_buffers()
 *
 *  \par Input:
 *    Input Parameters struct inp_par *inp, Image Parameters struct img_par *img
 *
 *  \par Output:
 *     Number of allocated bytes
 ***********************************************************************
 */
int init_global_buffers()
{
  int memory_size=0;
  int quad_range, i;

  if (global_init_done)
  {
    free_global_buffers();
  }

  // allocate memory for reference frame in find_snr
  memory_size += get_mem2Dpel(&imgY_ref, img->height, img->width);

  if (active_sps->chroma_format_idc != YUV400)
    memory_size += get_mem3Dpel(&imgUV_ref, 2, img->height_cr, img->width_cr);
  else
    imgUV_ref=NULL;

  // allocate memory in structure img
#ifdef	JFVM444	// 2005.12.05 Melco
  for( i=0; i<MAX_PLANE; i++ )
  {
    if(((img->mb_data_JF[i]) = (Macroblock *) calloc(img->FrameSizeInMbs, sizeof(Macroblock))) == NULL)
      no_mem_exit("init_global_buffers: img->mb_data");
  }
  img->mb_data = NULL;
#else	// JFVM
  if(((img->mb_data) = (Macroblock *) calloc(img->FrameSizeInMbs, sizeof(Macroblock))) == NULL)
    no_mem_exit("init_global_buffers: img->mb_data");
#endif	// JFVM

  if(((img->intra_block) = (int*)calloc(img->FrameSizeInMbs, sizeof(int))) == NULL)
    no_mem_exit("init_global_buffers: img->intra_block");

  memory_size += get_mem2Dint(&(img->ipredmode), 4*img->PicWidthInMbs , 4*img->FrameHeightInMbs);

  memory_size += get_mem2Dint(&(img->field_anchor),4*img->FrameHeightInMbs, 4*img->PicWidthInMbs);

  memory_size += get_mem3Dint(&(img->wp_weight), 2, MAX_REFERENCE_PICTURES, 3);
  memory_size += get_mem3Dint(&(img->wp_offset), 6, MAX_REFERENCE_PICTURES, 3);
  memory_size += get_mem4Dint(&(img->wbp_weight), 6, MAX_REFERENCE_PICTURES, MAX_REFERENCE_PICTURES, 3);

  // CAVLC mem
  memory_size += get_mem3Dint(&(img->nz_coeff), img->FrameSizeInMbs, 4, 4 + img->num_blk8x8_uv);

  memory_size += get_mem2Dint(&(img->siblock),img->PicWidthInMbs  , img->FrameHeightInMbs);
  
  if(img->max_imgpel_value > img->max_imgpel_value_uv || active_sps->chroma_format_idc == YUV400)
    quad_range = (img->max_imgpel_value + 1) * 2;
  else
    quad_range = (img->max_imgpel_value_uv + 1) * 2;

  if ((img->quad = (int*)calloc (quad_range, sizeof(int))) == NULL)
    no_mem_exit ("init_img: img->quad");

  for (i=0; i < quad_range/2; ++i)
  {
    img->quad[i]=i*i;
  }
  
  global_init_done = 1;

  img->oldFrameSizeInMbs = img->FrameSizeInMbs;

  return (memory_size);
}

/*!
 ************************************************************************
 * \brief
 *    Free allocated memory of frame size related global buffers
 *    buffers are defined in global.h, allocated memory is allocated in
 *    int init_global_buffers()
 *
 * \par Input:
 *    Input Parameters struct inp_par *inp, Image Parameters struct img_par *img
 *
 * \par Output:
 *    none
 *
 ************************************************************************
 */
void free_global_buffers()
{
  free_mem2Dpel (imgY_ref);
  if (imgUV_ref)
    free_mem3Dpel (imgUV_ref,2);

  // CAVLC free mem
  free_mem3Dint(img->nz_coeff, img->oldFrameSizeInMbs);

  free_mem2Dint(img->siblock);

  // free mem, allocated for structure img
  if (img->mb_data       != NULL) free(img->mb_data);

  free (img->intra_block);

  free_mem2Dint (img->ipredmode);

  free_mem2Dint(img->field_anchor);

  free_mem3Dint(img->wp_weight, 2);
  free_mem3Dint(img->wp_offset, 6);
  free_mem4Dint(img->wbp_weight, 6, MAX_REFERENCE_PICTURES);

  free (img->quad);

  global_init_done = 0;

}
