configfile.c

网络MPEG4IP流媒体开发源代码

  int IntContent;
  int i;

// Stage one: Generate an argc/argv-type list in items[], without comments and whitespace.
// This is context insensitive and could be done most easily with lex(1).

  while (p < bufend)
  {
    switch (*p)
    {
      case 13:
        p++;
        break;
      case '#':                 // Found comment
        *p = '\0';              // Replace '#' with '\0' in case of comment immediately following integer or string
        while (*p != '\n' && p < bufend)  // Skip till EOL or EOF, whichever comes first
          p++;
        InString = 0;
        InItem = 0;
        break;
      case '\n':
        InItem = 0;
        InString = 0;
        *p++='\0';
        break;
      case ' ':
      case '\t':              // Skip whitespace, leave state unchanged
        if (InString)
          p++;
        else
        {                     // Terminate non-strings once whitespace is found
          *p++ = '\0';
          InItem = 0;
        }
        break;

      case '"':               // Begin/End of String
        *p++ = '\0';
        if (!InString)
        {
          items[item++] = p;
          InItem = ~InItem;
        }
        else
          InItem = 0;
        InString = ~InString; // Toggle
        break;

      default:
        if (!InItem)
        {
          items[item++] = p;
          InItem = ~InItem;
        }
        p++;
    }
  }

  item--;

  for (i=0; i<item; i+= 3)
  {
    if (0 > (MapIdx = ParameterNameToMapIndex (items[i])))
    {
      snprintf (errortext, ET_SIZE, " Parsing error in config file: Parameter Name '%s' not recognized.", items[i]);
      error (errortext, 300);
    }
    if (strcmp ("=", items[i+1]))
    {
      snprintf (errortext, ET_SIZE, " Parsing error in config file: '=' expected as the second token in each line.");
      error (errortext, 300);
    }

    // Now interprete the Value, context sensitive...

    switch (Map[MapIdx].Type)
    {
      case 0:           // Numerical
        if (1 != sscanf (items[i+2], "%d", &IntContent))
        {
          snprintf (errortext, ET_SIZE, " Parsing error: Expected numerical value for Parameter of %s, found '%s'.", items[i], items[i+2]);
          error (errortext, 300);
        }
        * (int *) (Map[MapIdx].Place) = IntContent;
        printf (".");
        break;
      case 1:
        strcpy ((char *) Map[MapIdx].Place, items [i+2]);
        printf (".");
        break;
      default:
        assert ("Unknown value type in the map definition of configfile.h");
    }
  }
  memcpy (input, &configinput, sizeof (InputParameters));
  PatchInp();
}

/*!
 ***********************************************************************
 * \brief
 *    Returns the index number from Map[] for a given parameter name.
 * \param s
 *    parameter name string
 * \return
 *    the index number if the string is a valid parameter name,         \n
 *    -1 for error
 ***********************************************************************
 */
static int ParameterNameToMapIndex (char *s)
{
  int i = 0;

  while (Map[i].TokenName != NULL)
    if (0==strcmp (Map[i].TokenName, s))
      return i;
    else
      i++;
  return -1;
};

/*!
 ***********************************************************************
 * \brief
 *    Checks the input parameters for consistency.
 ***********************************************************************
 */
static void PatchInp ()
{
  // consistency check of QPs
  if (input->qp0 > 31 || input->qp0 < 0)
  {
    snprintf(errortext, ET_SIZE, "Error input parameter quant_0,check configuration file");
    error (errortext, 400);
  }

  if (input->qpN > 31 || input->qpN < 0)
  {
    snprintf(errortext, ET_SIZE, "Error input parameter quant_n,check configuration file");
    error (errortext, 400);
  }

  if (input->qpB > 31 || input->qpB < 0)
  {
    snprintf(errortext, ET_SIZE, "Error input parameter quant_B,check configuration file");
    error (errortext, 400);
  }

  if (input->qpsp > 31 || input->qpsp < 0)
  {
    snprintf(errortext, ET_SIZE, "Error input parameter quant_sp,check configuration file");
    error (errortext, 400);
  }
  if (input->qpsp_pred > 31 || input->qpsp_pred < 0)
  {
    snprintf(errortext, ET_SIZE, "Error input parameter quant_sp_pred,check configuration file");
    error (errortext, 400);
  }
  if (input->sp_periodicity <0)
  {
    snprintf(errortext, ET_SIZE, "Error input parameter sp_periodicity,check configuration file");
    error (errortext, 400);
  }
  // consistency check Search_range

  if (input->search_range > 39)   // StW
  {
    snprintf(errortext, ET_SIZE, "Error in input parameter search_range, check configuration file");
    error (errortext, 400);
  }

  // consistency check no_multpred
  if (input->no_multpred<1) input->no_multpred=1;


  // consistency check size information

  if (input->img_height % 16 != 0 || input->img_width % 16 != 0)
  {
    snprintf(errortext, ET_SIZE, "Unsupported image format x=%d,y=%d, must be a multiple of 16",input->img_width,input->img_height);
    error (errortext, 400);
  }

#ifdef _LEAKYBUCKET_
  // consistency check for Number of Leaky Bucket parameters
  if(input->NumberLeakyBuckets < 2 || input->NumberLeakyBuckets > 255) 
  {
    snprintf(errortext, ET_SIZE, "Number of Leaky Buckets should be between 2 and 255 but is %d \n", input->NumberLeakyBuckets);
    error(errortext, 400);
  }
#endif

  // Set block sizes

  // First, initialize input->blc_size to all zeros
  memset (input->blc_size,0, 4*8*2);

  // set individual items
  if (input->InterSearch16x16)
  {
    input->blc_size[1][0]=16;
    input->blc_size[1][1]=16;
  }
  if (input->InterSearch16x8)
  {
    input->blc_size[2][0]=16;
    input->blc_size[2][1]= 8;
  }
  if (input->InterSearch8x16)
  {
    input->blc_size[3][0]= 8;
    input->blc_size[3][1]=16;
  }
  if (input->InterSearch8x8)
  {
    input->blc_size[4][0]= 8;
    input->blc_size[4][1]= 8;
  }
  if (input->InterSearch8x4)
  {
    input->blc_size[5][0]= 8;
    input->blc_size[5][1]= 4;
  }
  if (input->InterSearch4x8)
  {
    input->blc_size[6][0]= 4;
    input->blc_size[6][1]= 8;
  }
  if (input->InterSearch4x4)
  {
    input->blc_size[7][0]= 4;
    input->blc_size[7][1]= 4;
  }

  if (input->partition_mode < 0 || input->partition_mode > 1)
  {
    snprintf(errortext, ET_SIZE, "Unsupported Partition mode, must be between 0 and 1");
    error (errortext, 400);
  }

  if (input->of_mode < 0 || input->of_mode > 3)
  {
    snprintf(errortext, ET_SIZE, "Unsupported Outpout file mode, must be between 0 and 2");
    error (errortext, 400);
  }

  // B picture consistency check
  if(input->successive_Bframe > input->jumpd)
  {
    snprintf(errortext, ET_SIZE, "Number of B-frames %d can not exceed the number of frames skipped", input->successive_Bframe);
    error (errortext, 400);
  }

  // Cabac/UVLC consistency check
  if (input->symbol_mode != UVLC && input->symbol_mode != CABAC)
  {
    snprintf (errortext, ET_SIZE, "Unsupported symbol mode=%d, use UVLC=0 or CABAC=1",input->symbol_mode);
    error (errortext, 400);
  }

  // Open Files

#ifndef H26L_LIB
  if ((p_in=fopen(input->infile,"rb"))==NULL)
  {
    snprintf(errortext, ET_SIZE, "Input file %s does not exist",input->infile);
    error (errortext, 500);
  }
#endif

  if (strlen (input->ReconFile) > 0 && (p_dec=fopen(input->ReconFile, "wb"))==NULL)
  {
    snprintf(errortext, ET_SIZE, "Error open file %s", input->ReconFile);
    error (errortext, 500);
  }

  if (strlen (input->TraceFile) > 0 && (p_trace=fopen(input->TraceFile,"w"))==NULL)
  {
    snprintf(errortext, ET_SIZE, "Error open file %s", input->TraceFile);
    error (errortext, 500);
  }
}