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/*=============================================================================
pamsumm
===============================================================================
Summarize all the samples of a PAM image with various functions.
By Bryan Henderson, San Jose CA 2004.02.07.
Contributed to the public domain
=============================================================================*/
#include "pm_c_util.h"
#include "pam.h"
#include "shhopt.h"
#include "mallocvar.h"
enum Function {FN_ADD, FN_MEAN, FN_MIN, FN_MAX};
struct CmdlineInfo {
/* All the information the user supplied in the command line,
in a form easy for the program to use.
*/
const char * inputFileName; /* Name of input file */
enum Function function;
unsigned int normalize;
unsigned int brief;
unsigned int verbose;
};
static void
parseCommandLine(int argc, const char ** const argv,
struct CmdlineInfo * const cmdlineP) {
optEntry * option_def;
/* Instructions to OptParseOptions3 on how to parse our options.
*/
optStruct3 opt;
unsigned int option_def_index;
unsigned int sumSpec, meanSpec, minSpec, maxSpec;
MALLOCARRAY(option_def, 100);
option_def_index = 0; /* incremented by OPTENT3 */
OPTENT3(0, "sum", OPT_FLAG, NULL, &sumSpec, 0);
OPTENT3(0, "mean", OPT_FLAG, NULL, &meanSpec, 0);
OPTENT3(0, "min", OPT_FLAG, NULL, &minSpec, 0);
OPTENT3(0, "max", OPT_FLAG, NULL, &maxSpec, 0);
OPTENT3(0, "normalize", OPT_FLAG, NULL, &cmdlineP->normalize, 0);
OPTENT3(0, "brief", OPT_FLAG, NULL, &cmdlineP->brief, 0);
OPTENT3(0, "verbose", OPT_FLAG, NULL, &cmdlineP->verbose, 0);
opt.opt_table = option_def;
opt.short_allowed = FALSE; /* We have no short (old-fashioned) options */
opt.allowNegNum = FALSE; /* We have no parms that are negative numbers */
pm_optParseOptions3(&argc, (char **)argv, opt, sizeof(opt), 0);
/* Uses and sets argc, argv, and some of *cmdlineP and others. */
if (sumSpec + minSpec + maxSpec > 1)
pm_error("You may specify at most one of -sum, -min, and -max");
if (sumSpec) {
cmdlineP->function = FN_ADD;
} else if (meanSpec) {
cmdlineP->function = FN_MEAN;
} else if (minSpec) {
cmdlineP->function = FN_MIN;
} else if (maxSpec) {
cmdlineP->function = FN_MAX;
} else
pm_error("You must specify one of -sum, -min, -max, or -mean");
if (argc-1 > 1)
pm_error("Too many arguments (%d). File name is the only argument.",
argc-1);
if (argc-1 < 1)
cmdlineP->inputFileName = "-";
else
cmdlineP->inputFileName = argv[1];
free(option_def);
}
struct Accum {
union {
double sum;
unsigned int min;
unsigned int max;
} u;
};
static void
initAccumulator(struct Accum * const accumulatorP,
enum Function const function) {
switch(function) {
case FN_ADD: accumulatorP->u.sum = 0.0; break;
case FN_MEAN: accumulatorP->u.sum = 0.0; break;
case FN_MIN: accumulatorP->u.min = UINT_MAX; break;
case FN_MAX: accumulatorP->u.max = 0; break;
}
}
static void
aggregate(struct pam * const inpamP,
tuple * const tupleRow,
enum Function const function,
struct Accum * const accumulatorP) {
unsigned int col;
for (col = 0; col < inpamP->width; ++col) {
unsigned int plane;
for (plane = 0; plane < inpamP->depth; ++plane) {
switch(function) {
case FN_ADD:
case FN_MEAN:
accumulatorP->u.sum += tupleRow[col][plane];
break;
case FN_MIN:
if (tupleRow[col][plane] < accumulatorP->u.min)
accumulatorP->u.min = tupleRow[col][plane];
break;
case FN_MAX:
if (tupleRow[col][plane] > accumulatorP->u.min)
accumulatorP->u.min = tupleRow[col][plane];
break;
}
}
}
}
static void
printSummary(struct Accum const accumulator,
unsigned int const scale,
unsigned int const count,
enum Function const function,
bool const mustNormalize,
bool const brief) {
switch (function) {
case FN_ADD: {
const char * const intro = brief ? "" : "the sum of all samples is ";
if (mustNormalize)
printf("%s%f\n", intro, accumulator.u.sum/scale);
else
printf("%s%u\n", intro, (unsigned int)accumulator.u.sum);
}
break;
case FN_MEAN: {
const char * const intro = brief ? "" : "the mean of all samples is ";
if (mustNormalize)
printf("%s%f\n", intro, accumulator.u.sum/count/scale);
else
printf("%s%f\n", intro, accumulator.u.sum/count);
}
break;
case FN_MIN: {
const char * const intro =
brief ? "" : "the minimum of all samples is ";
if (mustNormalize)
printf("%s%f\n", intro, (double)accumulator.u.min/scale);
else
printf("%s%u\n", intro, accumulator.u.min);
}
break;
case FN_MAX: {
const char * const intro =
brief ? "" : "the maximum of all samples is ";
if (mustNormalize)
printf("%s%f\n", intro, (double)accumulator.u.max/scale);
else
printf("%s%u\n", intro, accumulator.u.max);
}
break;
}
}
int
main(int argc, const char *argv[]) {
FILE * ifP;
tuple * inputRow; /* Row from input image */
unsigned int row;
struct CmdlineInfo cmdline;
struct pam inpam; /* Input PAM image */
struct Accum accumulator;
pm_proginit(&argc, argv);
parseCommandLine(argc, argv, &cmdline);
ifP = pm_openr(cmdline.inputFileName);
pnm_readpaminit(ifP, &inpam, PAM_STRUCT_SIZE(tuple_type));
inputRow = pnm_allocpamrow(&inpam);
initAccumulator(&accumulator, cmdline.function);
for (row = 0; row < inpam.height; ++row) {
pnm_readpamrow(&inpam, inputRow);
aggregate(&inpam, inputRow, cmdline.function, &accumulator);
}
printSummary(accumulator, (unsigned)inpam.maxval,
inpam.height * inpam.width * inpam.depth,
cmdline.function, cmdline.normalize, cmdline.brief);
pnm_freepamrow(inputRow);
pm_close(inpam.file);
return 0;
}
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