Iliyan Malchev | 7abfb48 | 2009-04-23 13:14:13 -0700 | [diff] [blame] | 1 | #include <debug.h> |
| 2 | #include <cmdline.h> |
| 3 | #include <stdio.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <getopt.h> |
| 6 | #include <string.h> |
| 7 | #include <ctype.h> |
| 8 | |
| 9 | extern char *optarg; |
| 10 | extern int optind, opterr, optopt; |
| 11 | |
| 12 | static struct option long_options[] = { |
| 13 | {"output", required_argument, 0, 'o'}, |
| 14 | {"height", required_argument, 0, 'h'}, |
| 15 | {"width", required_argument, 0, 'w'}, |
| 16 | {"gray", no_argument, 0, 'g'}, |
| 17 | {"type", required_argument, 0, 't'}, |
| 18 | {"rotate", required_argument, 0, 'r'}, |
| 19 | {"verbose", no_argument, 0, 'V'}, |
| 20 | {"help", no_argument, 0, 1}, |
| 21 | {0, 0, 0, 0}, |
| 22 | }; |
| 23 | |
| 24 | /* This array must parallel long_options[] */ |
| 25 | static const char *descriptions[] = { |
| 26 | "output file", |
| 27 | "image height in pixels", |
| 28 | "image width in pixels", |
| 29 | "process the luma plane only", |
| 30 | "encode as one of { 'ppm', 'rgb', or 'argb' }", |
| 31 | "rotate (90, -90, 180 degrees)", |
| 32 | "print verbose output", |
| 33 | "print this help screen", |
| 34 | }; |
| 35 | |
| 36 | void print_help(const char *name) { |
| 37 | fprintf(stdout, |
| 38 | "Converts yuv 4:2:0 to rgb24 and generates a PPM file.\n" |
| 39 | "invokation:\n" |
| 40 | "\t%s infile --height <height> --width <width> --output <outfile> -t <ppm|grb|argb> [ --gray ] [ --rotate <degrees> ] [ --verbose ]\n" |
| 41 | "\t%s infile --help\n", |
| 42 | name, name); |
| 43 | fprintf(stdout, "options:\n"); |
| 44 | struct option *opt = long_options; |
| 45 | const char **desc = descriptions; |
| 46 | while (opt->name) { |
| 47 | fprintf(stdout, "\t-%c/--%s%s: %s\n", |
| 48 | isprint(opt->val) ? opt->val : ' ', |
| 49 | opt->name, |
| 50 | (opt->has_arg ? " (argument)" : ""), |
| 51 | *desc); |
| 52 | opt++; |
| 53 | desc++; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | int get_options(int argc, char **argv, |
| 58 | char **outfile, |
| 59 | int *height, |
| 60 | int *width, |
| 61 | int *gray, |
| 62 | char **type, |
| 63 | int *rotate, |
| 64 | int *verbose) { |
| 65 | int c; |
| 66 | |
| 67 | ASSERT(outfile); *outfile = NULL; |
| 68 | ASSERT(height); *height = -1; |
| 69 | ASSERT(width); *width = -1; |
| 70 | ASSERT(gray); *gray = 0; |
| 71 | ASSERT(rotate); *rotate = 0; |
| 72 | ASSERT(verbose); *verbose = 0; |
| 73 | ASSERT(type); *type = NULL; |
| 74 | |
| 75 | while (1) { |
| 76 | /* getopt_long stores the option index here. */ |
| 77 | int option_index = 0; |
| 78 | |
| 79 | c = getopt_long (argc, argv, |
| 80 | "Vgo:h:w:r:t:", |
| 81 | long_options, |
| 82 | &option_index); |
| 83 | /* Detect the end of the options. */ |
| 84 | if (c == -1) break; |
| 85 | |
| 86 | if (isgraph(c)) { |
| 87 | INFO ("option -%c with value `%s'\n", c, (optarg ?: "(null)")); |
| 88 | } |
| 89 | |
| 90 | #define SET_STRING_OPTION(name) do { \ |
| 91 | ASSERT(optarg); \ |
| 92 | (*name) = strdup(optarg); \ |
| 93 | } while(0) |
| 94 | |
| 95 | #define SET_INT_OPTION(val) do { \ |
| 96 | ASSERT(optarg); \ |
| 97 | if (strlen(optarg) >= 2 && optarg[0] == '0' && optarg[1] == 'x') { \ |
| 98 | FAILIF(1 != sscanf(optarg+2, "%x", val), \ |
| 99 | "Expecting a hexadecimal argument!\n"); \ |
| 100 | } else { \ |
| 101 | FAILIF(1 != sscanf(optarg, "%d", val), \ |
| 102 | "Expecting a decimal argument!\n"); \ |
| 103 | } \ |
| 104 | } while(0) |
| 105 | |
| 106 | switch (c) { |
| 107 | case 0: |
| 108 | /* If this option set a flag, do nothing else now. */ |
| 109 | if (long_options[option_index].flag != 0) |
| 110 | break; |
| 111 | INFO ("option %s", long_options[option_index].name); |
| 112 | if (optarg) |
| 113 | INFO (" with arg %s", optarg); |
| 114 | INFO ("\n"); |
| 115 | break; |
| 116 | case 1: print_help(argv[0]); exit(1); break; |
| 117 | case 'o': |
| 118 | SET_STRING_OPTION(outfile); |
| 119 | break; |
| 120 | case 't': |
| 121 | SET_STRING_OPTION(type); |
| 122 | break; |
| 123 | case 'h': |
| 124 | SET_INT_OPTION(height); |
| 125 | break; |
| 126 | case 'w': |
| 127 | SET_INT_OPTION(width); |
| 128 | break; |
| 129 | case 'r': |
| 130 | SET_INT_OPTION(rotate); |
| 131 | break; |
| 132 | case 'g': *gray = 1; break; |
| 133 | case 'V': *verbose = 1; break; |
| 134 | case '?': |
| 135 | /* getopt_long already printed an error message. */ |
| 136 | break; |
| 137 | |
| 138 | #undef SET_STRING_OPTION |
| 139 | #undef SET_INT_OPTION |
| 140 | |
| 141 | default: |
| 142 | FAILIF(1, "Unknown option"); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | return optind; |
| 147 | } |