/* Set any XV property.
 * For example:
 *   xvset XV_COLORKEY 0xFF40FF
 *   xvset XV_SWITCHCRT 1
 * Adam Sampson <ats@offog.org> */

#include <stdio.h>
#include <stdlib.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/extensions/Xvlib.h>

void die(const char *s) {
	fprintf(stderr, "xvset: %s\n", s);
	exit(1);
}

int main(int argc, char **argv) {
	Display *display;
	Atom attribute;
	unsigned int nadaptors;
	XvAdaptorInfo *ainfo;
	int value;

	if (argc != 3)
		die("usage: xvset OPTION DECIMAL, or xvset OPTION 0xHEX");

	display = XOpenDisplay(NULL);
	if (!display)
		die("can't open display");

	XvQueryAdaptors(display, RootWindow(display, 0), &nadaptors, &ainfo);
	if (nadaptors != 1)
		die("not exactly 1 adaptor");

	if (strncmp(argv[2], "0x", 2) == 0) {
		value = strtol(argv[2] + 2, NULL, 16);
	} else {
		value = strtol(argv[2], NULL, 10);
	}

	attribute = XInternAtom(display, argv[1], False);
	if (XvSetPortAttribute(display, ainfo[0].base_id, attribute, value)
	    != Success)
		die("unable to set attribute");

	XCloseDisplay(display);

	return 0;
}