/*!
 ***********************************************************************
 *  \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 8.6
 *
 *  \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-Lang鴜       <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>
 *     - 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 <conio.h>
#endif

#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          "8"
#define VERSION     "8.6"

#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;

// 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
 *    main function for TML decoder
 ***********************************************************************
 */
int main(int argc, char **argv)
{
    // 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");

  // Read Configuration File
  if (argc != 2)
  {
    snprintf(errortext, ET_SIZE, "Usage: %s <config.dat> \n\t<config.dat> defines decoder parameters",argv[0]);
    error(errortext, 300);
  }

  init_conf(input, argv[1]);

  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_dpb(input);
  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=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();

  fclose(p_out);
//  fclose(p_out2);
  if (p_ref)
    fclose(p_ref);
#if TRACE
  fclose(p_trace);
#endif

  ercClose(erc_errorVar);

  free_dpb();
  uninit_out_buffer();

  free_collocated(Co_located);
  free (input);
  free (snr);
  free (img);
  
  //while( !kbhit() ); 
  return 0;
}


/*!
 ***********************************************************************
 * \brief
 *    Initilize some arrays
 ***********************************************************************
 */
void init(struct img_par *img)  //!< image parameters
{
  int i;

  // initilize quad matrix used in snr routine
  for (i=0; i <  256; i++)
  {
    img->quad[i]=i*i; // fix from TML 1, truncation removed
  }

  img->oldFrameSizeInMbs = -1;
}


/*!
 ************************************************************************
 * \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 bitsream
  fscanf(fd,"%*[^\n]");

  fscanf(fd,"%s",inp->outfile);               // YUV 4:2:2 input format
  fscanf(fd,"%*[^\n]");

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


  // Frame buffer size
  fscanf(fd,"%d,",&inp->dpb_size);   // may be overwritten in case of RTP NAL
  fscanf(fd,"%*[^\n]");
  if (inp->dpb_size < 1)
  {
    snprintf(errortext, ET_SIZE, "Decoded Picture Buffer Size is %d. It has to be at least 1",inp->dpb_size);
    error(errortext,1);
  }

  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 > 2)
  {
    snprintf(errortext, ET_SIZE, "Poc Scale is %d. It has to be 1 or 2",inp->poc_scale);
    error(errortext,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);


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

  fprintf(stdout,"--------------------------------------------------------------------------\n");
  fprintf(stdout," Decoder config file                    : %s \n",config_filename);
  fprintf(stdout,"--------------------------------------------------------------------------\n");
  fprintf(stdout," Input H.264 bitstream                  : %s \n",inp->infile);
  fprintf(stdout," Output decoded YUV 4:2:0               : %s \n",inp->outfile);
  fprintf(stdout," Output status file                     : %s \n",LOGFILE);
  if ((p_ref=fopen(inp->reffile,"rb"))==0)
  {
    fprintf(stdout," Input reference file                   : %s does not exist \n",inp->reffile);
    fprintf(stdout,"                                          SNR values are not available\n");
  }
  else
    fprintf(stdout," Input reference file                   : %s \n",inp->reffile);

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

/*!
 ************************************************************************
 * \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