C++ OptionSet::params方法代码示例

int main(int argc, char** argv)
{
	string src_conn_name = "unknown";
	string dst_conn_name = "hdmi";
	PixelFormat pixfmt = PixelFormat::XRGB8888;

	OptionSet optionset = {
		Option("s|src=", [&](string s)
		{
			src_conn_name = s;
		}),
		Option("d|dst=", [&](string s)
		{
			dst_conn_name = s;
		}),
		Option("f|format=", [&](string s)
		{
			pixfmt = FourCCToPixelFormat(s);
		}),
		Option("h|help", [&]()
		{
			puts(usage_str);
			exit(-1);
		}),
	};

	optionset.parse(argc, argv);

	if (optionset.params().size() > 0) {
		puts(usage_str);
		exit(-1);
	}

	VideoDevice vid("/dev/video11");

	Card card;
	ResourceManager resman(card);

	auto src_conn = resman.reserve_connector(src_conn_name);
	auto src_crtc = resman.reserve_crtc(src_conn);

	uint32_t src_width = src_crtc->mode().hdisplay;
	uint32_t src_height = src_crtc->mode().vdisplay;

	printf("src %s, crtc %ux%u\n", src_conn->fullname().c_str(), src_width, src_height);

	auto dst_conn = resman.reserve_connector(dst_conn_name);
	auto dst_crtc = resman.reserve_crtc(dst_conn);
	auto dst_plane = resman.reserve_overlay_plane(dst_crtc, pixfmt);
	FAIL_IF(!dst_plane, "Plane not found");

	uint32_t dst_width = min((uint32_t)dst_crtc->mode().hdisplay, src_width);
	uint32_t dst_height = min((uint32_t)dst_crtc->mode().vdisplay, src_height);

	printf("dst %s, crtc %ux%u, plane %ux%u\n", dst_conn->fullname().c_str(),
	       dst_crtc->mode().hdisplay, dst_crtc->mode().vdisplay,
	       dst_width, dst_height);

	for (int i = 0; i < CAMERA_BUF_QUEUE_SIZE; ++i) {
		auto fb = new DumbFramebuffer(card, src_width, src_height, pixfmt);
		s_fbs.push_back(fb);
		s_free_fbs.push_back(fb);
	}

	// get one fb for initial setup
	s_ready_fbs.push_back(s_free_fbs.back());
	s_free_fbs.pop_back();

	// This draws a moving bar to SRC display
	BarFlipState barflipper(card, src_crtc);
	barflipper.start_flipping();

	// This shows the captures SRC frames on DST display
	WBFlipState wbflipper(card, dst_crtc, dst_plane);
	wbflipper.setup(0, 0, dst_width, dst_height);

	WBStreamer wb(vid.get_capture_streamer(), src_crtc, src_width, src_height, pixfmt);
	wb.start_streaming();

	vector<pollfd> fds(3);

	fds[0].fd = 0;
	fds[0].events =  POLLIN;
	fds[1].fd = wb.fd();
	fds[1].events =  POLLIN;
	fds[2].fd = card.fd();
	fds[2].events =  POLLIN;

	while (true) {
		int r = poll(fds.data(), fds.size(), -1);
		ASSERT(r > 0);

		if (fds[0].revents != 0)
			break;

		if (fds[1].revents) {
			fds[1].revents = 0;

			wb.Dequeue();
			wbflipper.queue_next();
//.........这里部分代码省略.........

int main(int argc, char **argv)
{
	string dev_path;
	unsigned id = 0;

	OptionSet optionset = {
		Option("|device=",
		[&](string s)
		{
			dev_path = s;
		}),
		Option("|id=",
		[&](string s)
		{
			id = stoul(s);
		}),
		Option("p", [&](string s)
		{
			opts.print_props = true;
		}),
		Option("m", [&](string s)
		{
			opts.print_modes = true;
		}),
		Option("r", [&](string s)
		{
			opts.recurse = true;
		}),
		Option("h|help", [&]()
		{
			usage();
			exit(-1);
		}),
	};

	optionset.parse(argc, argv);

	if (optionset.params().size() > 0) {
		usage();
		exit(-1);
	}

	Card card;

	/* No options impliles recursion */
	if (id == 0) {
		opts.recurse = true;
		for (auto conn : card.get_connectors())
			print_connector(*conn, 0);
		return 0;
	} else {
		auto ob = card.get_object(id);
		if (!ob) {
			cerr << "kmsprint" << ": Object id " <<
				id << " not found." << endl;
			return -1;
		}

		if (auto co = dynamic_cast<Connector*>(ob))
			print_connector(*co, 0);
		else if (auto en = dynamic_cast<Encoder*>(ob))
			print_encoder(*en, 0);
		else if (auto cr = dynamic_cast<Crtc*>(ob))
			print_crtc(*cr, 0);
		else if (auto pl = dynamic_cast<Plane*>(ob))
			print_plane(*pl, 0);
		else {
			cerr << "kmsprint" << ": Unkown DRM Object type" <<
				endl;
			return -1;
		}

		return 0;
	}
}