param.c

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        pm_error("Unable to resolve backtick entry in input file list.  "
                 "Could not open piped command: '%s'", cmd);
    } else {
        struct inputSource subInputSource;
        ReadInputFileNames(fp, "HOPE-THIS_ISNT_A_FILENAME.xyz5555",
                           &subInputSource);

        mergeInputSource(inputSourceP, &subInputSource);
    }
}



static void
ReadInputFileNames(FILE *               const fpointer, 
                   const char *         const endInput,
                   struct inputSource * const inputSourceP) {
/*----------------------------------------------------------------------------
   Read a list of input file names from the parameter file.  Add 
   the information to *inputSourceP.

   If inputSourceP == NULL, read off the list, but ignore it.
-----------------------------------------------------------------------------*/
    char input[256];
    bool endStatementRead;

    /* read param file up through endInput statement.  Each line until
       endInput is a file specification.
    */
    endStatementRead = FALSE;

    while (!endStatementRead) {
        char * rc;
        rc = fgets(input, sizeof(input), fpointer);

        if (feof(fpointer))
            pm_error("End of file before section end statement '%s'",
                     endInput);
        else if (rc == NULL)
            pm_error("Error reading file names from parameter file.");
        else {
            if (strncmp(input, endInput, strlen(endInput)) == 0)
                endStatementRead = TRUE;
            else if ((input[0] == '#') || (input[0] == '\n')) { 
                /* It's a comment or blank line.  Ignore it */
            } else if (input[0] == '`' ) {
                expandBackTickLine(input, inputSourceP);
            } else {
                /* get rid of trailing whitespace including newline */
                while (ISSPACE(input[strlen(input)-1]))
                    input[strlen(input)-1] = '\0';
                if (inputSourceP)
                    AddInputFiles(inputSourceP, input);
            }
        }
    }
}



static void
initOptionSeen(void) {

    unsigned int index;
    
    for (index = FIRST_OPTION; index < NUM_OPTIONS; ++index)
        optionSeen[index] = FALSE;
}



static void
verifyNoMissingEncodeFramesOption(void) {
    if (!optionSeen[OPTION_GOP])
        pm_error("GOP_SIZE option missing");
    if (!optionSeen[OPTION_PATTERN])
        pm_error("PATTERN option missing");
    if (!optionSeen[OPTION_PIXEL])
        pm_error("PIXEL option missing");
    if (!optionSeen[OPTION_PQSCALE])
        pm_error("PQSCALE option missing");
    if (!optionSeen[OPTION_OUTPUT])
        pm_error("OUTPUT option missing");
    if (!optionSeen[OPTION_RANGE])
        pm_error("RANGE option missing");
    if (!optionSeen[OPTION_PSEARCH_ALG])
        pm_error("PSEARCH_ALG option missing");
    if (!optionSeen[OPTION_IQSCALE])
        pm_error("IQSCALE option missing");
    if (!optionSeen[OPTION_INPUT_DIR])
        pm_error("INPUT_DIR option missing");
    if (!optionSeen[OPTION_INPUT_CONVERT])
        pm_error("INPUT_CONVERT option missing");
    if (!optionSeen[OPTION_BQSCALE])
        pm_error("BQSCALE option missing");
    if (!optionSeen[OPTION_BASE_FORMAT])
        pm_error("BASE_FILE_FORMAT option missing");
    if (!optionSeen[OPTION_SPF])
        pm_error("SLICES_PER_FRAME option missing");
    if (!optionSeen[OPTION_BSEARCH_ALG])
        pm_error("BSEARCH_ALG option missing");
    if (!optionSeen[OPTION_REF_FRAME])
        pm_error("REFERENCE_FRAME option missing");
}



static void
verifyNoMissingCombineGopsOption(void) {

    if (!optionSeen[OPTION_GOP_INPUT])
        pm_error("GOP_INPUT option missing");
    if (!optionSeen[OPTION_YUV_SIZE])
        pm_error("YUV_SIZE option missing");
    if (!optionSeen[OPTION_OUTPUT])
        pm_error("OUTPUT option missing");
}



static void
verifyNoMissingCombineFramesOption(void) {

    if (!optionSeen[OPTION_GOP])
        pm_error("GOP_SIZE option missing");
    if (!optionSeen[OPTION_YUV_SIZE])
        pm_error("YUV_SIZE option missing");
    if (!optionSeen[OPTION_OUTPUT])
        pm_error("OUTPUT option missing");
}



static void
verifyNoMissingOption(int  const function) {
/*----------------------------------------------------------------------------
  Verify that the parameter file contains every option it is supposed to. 
  Abort program if not.
-----------------------------------------------------------------------------*/
    switch(function) {
    case ENCODE_FRAMES:
        verifyNoMissingEncodeFramesOption();
        break;
    case COMBINE_GOPS:
        verifyNoMissingCombineGopsOption();
        break;
    case COMBINE_FRAMES:
        verifyNoMissingCombineFramesOption();
        break;
    default:
        pm_error("Internal error - impossible value for 'function': %d",
                 function);
    }
}



static void
processIqtable(FILE * const fpointer) {

    unsigned int row;
    unsigned int col;
    char input[256];

    for (row = 0; row < 8; ++row) {
        const char * charPtr;

        fgets(input, 256, fpointer);
        charPtr = input;
        if (8 != sscanf(charPtr,"%d %d %d %d %d %d %d %d",
                        &qtable[row*8+0],  &qtable[row*8+1],
                        &qtable[row*8+2],  &qtable[row*8+3],
                        &qtable[row*8+4],  &qtable[row*8+5],
                        &qtable[row*8+6],  &qtable[row*8+7])) {
            pm_error("Line %d of IQTABLE doesn't have 8 elements!", 
                     row);
        }
        for (col = 0; col < 8; ++col) {
            if ((qtable[row*8+col]<1) || (qtable[row*8+col]>255)) {
                pm_message(
                    "Warning:  IQTable Element %1d,%1d (%d) "
                    "corrected to 1-255.",
                    row+1, col+1, qtable[row*8+col]);
                qtable[row*8+col] = (qtable[row*8+col]<1)?1:255;
            }
        }
    }
            
    if (qtable[0] != 8) {
        pm_message("Warning:  IQTable Element 1,1 reset to 8, "
                   "since it must be 8.");
        qtable[0] = 8;
    }
    customQtable = qtable;
}



static void
setInputSource(int                   const function,
               struct inputSource ** const inputSourcePP,
               struct inputSource *  const inputSourceP,
               struct inputSource *  const gopInputSourceP,
               struct inputSource *  const frameInputSourceP) {

    switch (function) {
    case ENCODE_FRAMES:
        *inputSourcePP = inputSourceP;
        DestroyInputSource(gopInputSourceP);
        DestroyInputSource(frameInputSourceP);
        break;
    case COMBINE_GOPS:
        *inputSourcePP = gopInputSourceP;
        DestroyInputSource(inputSourceP);
        DestroyInputSource(frameInputSourceP);
        break;
    case COMBINE_FRAMES:
        *inputSourcePP = frameInputSourceP;
        DestroyInputSource(inputSourceP);
        DestroyInputSource(gopInputSourceP);
        break;
    default:
      pm_error("INTERNAL ERROR: invalid 'function' %d", function);
    }
}



/*=====================*
 * EXPORTED PROCEDURES *
 *=====================*/


/*===========================================================================*
 *
 * ReadParamFile
 *
 *	read the parameter file
 *	function is ENCODE_FRAMES, COMBINE_GOPS, or COMBINE_FRAMES, and
 *	    will slightly modify the procedure's behavior as to what it
 *	    is looking for in the parameter file
 *
 * SIDE EFFECTS:    sets parameters accordingly, as well as machine info for
 *		    parallel execution and input file names
 *
 *===========================================================================*/
void
ReadParamFile(const char *    const fileName, 
              int             const function,
              struct params * const paramP) {

  FILE *fpointer;
  char    input[256];
  const char *charPtr;
  boolean yuvUsed = FALSE;
  int row, col;
  struct inputSource * inputSourceP;
      /* Contents of INPUT section */
  struct inputSource * frameInputSourceP;
      /* Contents of FRAME_INPUT section */
  struct inputSource * gopInputSourceP;
      /* Contents of GOP_INPUT section */

  fpointer = fopen(fileName, "r");
  if (fpointer == NULL)
      pm_error("Error:  Cannot open parameter file:  %s", fileName);

  CreateInputSource(&inputSourceP);
  CreateInputSource(&frameInputSourceP);
  CreateInputSource(&gopInputSourceP);

  /* should set defaults */
  numMachines = 0;
  sprintf(currentPath, ".");
  sprintf(currentGOPPath, ".");
  sprintf(currentFramePath, ".");
#ifndef HPUX
  SetRemoteShell("rsh");
#else
  SetRemoteShell("remsh");
#endif
  keepTempFiles = FALSE;
  paramP->warnOverflow = FALSE;
  paramP->warnUnderflow = FALSE;

  initOptionSeen();

  while ( fgets(input, 256, fpointer) != NULL ) {
    /* skip comments */
    if ( input[0] == '#' ) {            
      continue;
    }

    {
      int len = strlen(input);
      if (input[len-1] == '\n') {
	len--;
        input[len] = '\0'; /* get rid of newline */
	/* Junk whitespace */
	while ((len >= 0) && ((input[len-1] == ' ') || (input[len-1] == '\t'))) {
	  input[--len] = '\0';
	}
      }
    }

    if (strlen(SkipSpacesTabs(input)) == 0) continue;

    switch(input[0]) {
    case 'A':
      if ( strncmp(input, "ASPECT_RATIO", 12) == 0 ) {
        charPtr = SkipSpacesTabs(&input[12]);
        aspectRatio = GetAspectRatio(charPtr);
        optionSeen[OPTION_ASPECT_RATIO] = TRUE;
      }
      break;

    case 'B':
      if ( strncmp(input, "BQSCALE", 7) == 0 ) {
        charPtr = SkipSpacesTabs(&input[7]);
        SetBQScale(atoi(charPtr));
        optionSeen[OPTION_BQSCALE] = TRUE;
      } else if ( strncmp(input, "BASE_FILE_FORMAT", 16) == 0 ) {
        charPtr = SkipSpacesTabs(&input[16]);
        SetFileFormat(charPtr);
        if ( (strncmp(charPtr,"YUV",3) == 0) || 
            (strcmp(charPtr,"Y") == 0) ) {
          yuvUsed = TRUE;
        }
        optionSeen[OPTION_BASE_FORMAT] = TRUE;
      } else if ( strncmp(input, "BSEARCH_ALG", 11) == 0 ) {
        charPtr = SkipSpacesTabs(&input[11]);
        SetBSearchAlg(charPtr);
        optionSeen[OPTION_BSEARCH_ALG] = TRUE;
      } else if ( strncmp(input, "BIT_RATE", 8) == 0 ) {
        charPtr = SkipSpacesTabs(&input[8]);
        setBitRate(charPtr);
        optionSeen[OPTION_BIT_RATE] = TRUE;
      } else if ( strncmp(input, "BUFFER_SIZE", 11) == 0 ) {
        charPtr = SkipSpacesTabs(&input[11]);
        setBufferSize(charPtr);
        optionSeen[OPTION_BUFFER_SIZE] = TRUE;                  
      }
      break;

    case 'C':
      if ( strncmp(input, "CDL_FILE", 8) == 0 ) {
        charPtr = SkipSpacesTabs(&input[8]);
        strcpy(specificsFile, charPtr);
        specificsOn=TRUE;
        optionSeen[OPTION_SPECIFICS] = TRUE;
      } else if ( strncmp(input, "CDL_DEFINES", 11) == 0 ) {
        charPtr = SkipSpacesTabs(&input[11]);
        strcpy(specificsDefines, charPtr);
        optionSeen[OPTION_DEFS_SPECIFICS] = TRUE;
      }
      break;