This allows to get the device index based on the usb bus and port number
Signed-off-by: Nicolas Sugino <nsugino(a)3way.com.ar>
---
include/rtl-sdr.h | 12 ++++++++++++
src/librtlsdr.c | 41 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 53 insertions(+)
diff --git a/include/rtl-sdr.h b/include/rtl-sdr.h
index 3ed13ae..d1e3c1e 100644
--- a/include/rtl-sdr.h
+++ b/include/rtl-sdr.h
@@ -60,6 +60,18 @@ RTLSDR_API int rtlsdr_get_device_usb_strings(uint32_t index,
*/
RTLSDR_API int rtlsdr_get_index_by_serial(const char *serial);
+/*!
+ * Get device index by USB bus and port number
+ *
+ * \param bus bus number where the device is connected
+ * \param port port number where the device is connected
+ * \return device index of first device where the name matched
+ * \return -1 on libusb initialization failure
+ * \return -2 if no devices were found at all
+ * \return -3 if devices were found, but none with matching bus and port
+ */
+RTLSDR_API int rtlsdr_get_index_by_usb_bus_port(uint8_t bus, uint8_t port);
+
RTLSDR_API int rtlsdr_open(rtlsdr_dev_t **dev, uint32_t index);
RTLSDR_API int rtlsdr_close(rtlsdr_dev_t *dev);
diff --git a/src/librtlsdr.c b/src/librtlsdr.c
index 89ec903..eca093a 100644
--- a/src/librtlsdr.c
+++ b/src/librtlsdr.c
@@ -1436,6 +1436,47 @@ int rtlsdr_get_index_by_serial(const char *serial)
return -3;
}
+int rtlsdr_get_index_by_usb_bus_port(uint8_t bus, uint8_t port)
+{
+ int r = -2, index = -3;
+ int i;
+ libusb_context *ctx;
+ libusb_device **list;
+ struct libusb_device_descriptor dd;
+ uint8_t reg, dev_bus, dev_port;
+ ssize_t cnt;
+
+ r = libusb_init(&ctx);
+ if(r < 0){
+ return -1;
+ }
+
+ cnt = libusb_get_device_list(ctx, &list);
+ if (!cnt) {
+ libusb_exit(ctx);
+ return -2;
+ }
+
+ for (i = 0; i < cnt; i++) {
+ dev_bus = libusb_get_bus_number(list[i]);
+ dev_port = libusb_get_port_number(list[i]);
+
+ libusb_get_device_descriptor(list[i], &dd);
+
+ if (find_known_device(dd.idVendor, dd.idProduct) &&
+ bus == dev_bus && port == dev_port) {
+ index = i;
+ break;
+ }
+ }
+
+ libusb_free_device_list(list, 1);
+
+ libusb_exit(ctx);
+
+ return index;
+}
+
int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)
{
int r;
--
2.13.6
