[gstreamer] goption

■ The GOption interface：

goption.c

#include <gst/gst.h>
#include <stdio.h>
int
main (int   argc,
      char *argv[])
{
  gboolean silent = FALSE;
  gchar *savefile = NULL;
  GOptionContext *ctx;
  GError *err = NULL;
  GOptionEntry entries[] = {
    { "silent", 's', 0, G_OPTION_ARG_NONE, &silent,
      "do not output status information", NULL },
    { "output", 'o', 0, G_OPTION_ARG_STRING, &savefile,
      "save xml representation of pipeline to FILE and exit", "FILE" },
    { NULL }
  };

  ctx = g_option_context_new ("- Your application");
  g_option_context_add_main_entries (ctx, entries, NULL);
  g_option_context_add_group (ctx, gst_init_get_option_group ());
  if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
    g_print ("Failed to initialize: %s
", err->message);
    g_clear_error (&err);
    g_option_context_free (ctx);
    return 1;
  }
  g_option_context_free (ctx);

  printf ("Run me with --help to see the Application options appended.
");
  printf ("silent = %d savefile=%s.
", silent, savefile);

  return 0;
}

■ 编译

gcc goption.c -o goption `pkg-config --cflags --libs gstreamer-1.0`

■ 运行结果

renhl@renhl:~/share/1/goption$ ./goption -o test.txt
Run me with --help to see the Application options appended.
silent = 0 savefile=test.txt.
renhl@renhl:~/share/1/goption$ ./goption -s 1  -o test.txt
Run me with --help to see the Application options appended.
silent = 1 savefile=test.txt.
renhl@renhl:~/share/1/goption$ vim goption.c

■ 参考

https://developer.gnome.org/glib/stable/glib-Commandline-option-parser.html

https://gstreamer.freedesktop.org/documentation/application-development/basics/init.html#the-goption-interface