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#include <debug.h>
#include <cmdline.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <ctype.h>
extern char *optarg;
extern int optind, opterr, optopt;
static struct option long_options[] = {
{"output", required_argument, 0, 'o'},
{"height", required_argument, 0, 'h'},
{"width", required_argument, 0, 'w'},
{"gray", no_argument, 0, 'g'},
{"type", required_argument, 0, 't'},
{"rotate", required_argument, 0, 'r'},
{"verbose", no_argument, 0, 'V'},
{"help", no_argument, 0, 1},
{0, 0, 0, 0},
};
/* This array must parallel long_options[] */
static const char *descriptions[] = {
"output file",
"image height in pixels",
"image width in pixels",
"process the luma plane only",
"encode as one of { 'ppm', 'rgb', or 'argb' }",
"rotate (90, -90, 180 degrees)",
"print verbose output",
"print this help screen",
};
void print_help(const char *name) {
fprintf(stdout,
"Converts yuv 4:2:0 to rgb24 and generates a PPM file.\n"
"invokation:\n"
"\t%s infile --height <height> --width <width> --output <outfile> -t <ppm|grb|argb> [ --gray ] [ --rotate <degrees> ] [ --verbose ]\n"
"\t%s infile --help\n",
name, name);
fprintf(stdout, "options:\n");
struct option *opt = long_options;
const char **desc = descriptions;
while (opt->name) {
fprintf(stdout, "\t-%c/--%s%s: %s\n",
isprint(opt->val) ? opt->val : ' ',
opt->name,
(opt->has_arg ? " (argument)" : ""),
*desc);
opt++;
desc++;
}
}
int get_options(int argc, char **argv,
char **outfile,
int *height,
int *width,
int *gray,
char **type,
int *rotate,
int *verbose) {
int c;
ASSERT(outfile); *outfile = NULL;
ASSERT(height); *height = -1;
ASSERT(width); *width = -1;
ASSERT(gray); *gray = 0;
ASSERT(rotate); *rotate = 0;
ASSERT(verbose); *verbose = 0;
ASSERT(type); *type = NULL;
while (1) {
/* getopt_long stores the option index here. */
int option_index = 0;
c = getopt_long (argc, argv,
"Vgo:h:w:r:t:",
long_options,
&option_index);
/* Detect the end of the options. */
if (c == -1) break;
if (isgraph(c)) {
INFO ("option -%c with value `%s'\n", c, (optarg ?: "(null)"));
}
#define SET_STRING_OPTION(name) do { \
ASSERT(optarg); \
(*name) = strdup(optarg); \
} while(0)
#define SET_INT_OPTION(val) do { \
ASSERT(optarg); \
if (strlen(optarg) >= 2 && optarg[0] == '0' && optarg[1] == 'x') { \
FAILIF(1 != sscanf(optarg+2, "%x", val), \
"Expecting a hexadecimal argument!\n"); \
} else { \
FAILIF(1 != sscanf(optarg, "%d", val), \
"Expecting a decimal argument!\n"); \
} \
} while(0)
switch (c) {
case 0:
/* If this option set a flag, do nothing else now. */
if (long_options[option_index].flag != 0)
break;
INFO ("option %s", long_options[option_index].name);
if (optarg)
INFO (" with arg %s", optarg);
INFO ("\n");
break;
case 1: print_help(argv[0]); exit(1); break;
case 'o':
SET_STRING_OPTION(outfile);
break;
case 't':
SET_STRING_OPTION(type);
break;
case 'h':
SET_INT_OPTION(height);
break;
case 'w':
SET_INT_OPTION(width);
break;
case 'r':
SET_INT_OPTION(rotate);
break;
case 'g': *gray = 1; break;
case 'V': *verbose = 1; break;
case '?':
/* getopt_long already printed an error message. */
break;
#undef SET_STRING_OPTION
#undef SET_INT_OPTION
default:
FAILIF(1, "Unknown option");
}
}
return optind;
}
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