X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=bmusb.cpp;h=5fda2177cd33ee19e0630bdff3a049ab42f8c43e;hb=b9433278b3cca82312d3785e2e75a57375a8683c;hp=09473fd9f6ca4f839435bedbc1e2838cd100b35e;hpb=92708386b8ea2a63b99c20e6a5f6beff3d9311ac;p=bmusb

diff --git a/bmusb.cpp b/bmusb.cpp
index 09473fd..5fda217 100644
--- a/bmusb.cpp
+++ b/bmusb.cpp
@@ -1,4 +1,4 @@
-// Intensity Shuttle USB3 capture driver, v0.4
+// Intensity Shuttle USB3 capture driver, v0.5
 // Can download 8-bit and 10-bit UYVY/v210 frames from HDMI, quite stable
 // (can do captures for hours at a time with no drops), except during startup
 // 576p60/720p60/1080i60 works, 1080p60 does not work (firmware limitation)
@@ -878,12 +878,15 @@ void BMUSBCapture::usb_thread_func()
 		printf("couldn't set realtime priority for USB thread: %s\n", strerror(errno));
 	}
 	while (!should_quit) {
-		int rc = libusb_handle_events(nullptr);
+		timeval sec { 1, 0 };
+		int rc = libusb_handle_events_timeout(nullptr, &sec);
 		if (rc != LIBUSB_SUCCESS)
 			break;
 	}
 }
 
+namespace {
+
 struct USBCardDevice {
 	uint16_t product;
 	uint8_t bus, port;
@@ -912,7 +915,7 @@ string get_card_description(int id, uint8_t bus, uint8_t port, uint16_t product)
 	return buf;
 }
 
-libusb_device_handle *open_card(int card_index, string *description)
+vector<USBCardDevice> find_all_cards()
 {
 	libusb_device **devices;
 	ssize_t num_devices = libusb_get_device_list(nullptr, &devices);
@@ -950,6 +953,13 @@ libusb_device_handle *open_card(int card_index, string *description)
 		return a.port < b.port;
 	});
 
+	return found_cards;
+}
+
+libusb_device_handle *open_card(int card_index, string *description)
+{
+	vector<USBCardDevice> found_cards = find_all_cards();
+
 	for (size_t i = 0; i < found_cards.size(); ++i) {
 		string tmp_description = get_card_description(i, found_cards[i].bus, found_cards[i].port, found_cards[i].product);
 		fprintf(stderr, "%s\n", tmp_description.c_str());
@@ -1000,6 +1010,24 @@ libusb_device_handle *open_card(unsigned card_index, libusb_device *dev, string
 	return devh;
 }
 
+}  // namespace
+
+unsigned BMUSBCapture::num_cards()
+{
+	int rc = libusb_init(nullptr);
+	if (rc < 0) {
+		fprintf(stderr, "Error initializing libusb: %s\n", libusb_error_name(rc));
+		exit(1);
+	}
+
+	vector<USBCardDevice> found_cards = find_all_cards();
+	unsigned ret = found_cards.size();
+	for (size_t i = 0; i < found_cards.size(); ++i) {
+		libusb_unref_device(found_cards[i].device);
+	}
+	return ret;
+}
+
 void BMUSBCapture::configure_card()
 {
 	if (video_frame_allocator == nullptr) {