[aravis/wip/emmanuel/usb3vision: 3/7] usb: detect USB3Vision cameras

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 17e6b5724c4cb94dffc92a97fa6dc92416bb78d6
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Mon Apr 4 17:18:07 2016 +0200

    usb: detect USB3Vision cameras

 src/arvuvinterface.c |   63 +++++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 55 insertions(+), 8 deletions(-)
---
diff --git a/src/arvuvinterface.c b/src/arvuvinterface.c
index 82f6a56..ac45dd9 100644
--- a/src/arvuvinterface.c
+++ b/src/arvuvinterface.c
@@ -28,6 +28,7 @@
 #include <arvuvinterface.h>
 #include <arvdebug.h>
 #include <arvmisc.h>
+#include <arvstr.h>
 #include <libusb.h>
 #include <stdio.h>
 
@@ -89,9 +90,11 @@ printdev (libusb_device *device)
 }
 #endif
 
-gboolean
-_usb_device_is_usb3vision (libusb_device *device)
+ArvInterfaceDeviceIds *
+_usb_device_to_device_ids (libusb_device *device)
 {
+       ArvInterfaceDeviceIds *device_ids = NULL;
+       libusb_device_handle *device_handle;
        struct libusb_device_descriptor desc;
        struct libusb_config_descriptor *config;
        const struct libusb_interface *inter;
@@ -102,13 +105,13 @@ _usb_device_is_usb3vision (libusb_device *device)
        r = libusb_get_device_descriptor (device, &desc);
        if (r < 0) {
                g_warning ("Failed to get device descriptor");
-               return FALSE;
+               return NULL;
        }
 
        if (desc.bDeviceClass != ARV_UV_INTERFACE_DEVICE_CLASS ||
            desc.bDeviceSubClass != ARV_UV_INTERFACE_DEVICE_SUBCLASS ||
            desc.bDeviceProtocol != ARV_UV_INTERFACE_DEVICE_PROTOCOL)
-               return FALSE;
+               return NULL;
 
        libusb_get_config_descriptor (device, 0, &config);
        for (i = 0; i< (int) config->bNumInterfaces; i++) {
@@ -122,7 +125,45 @@ _usb_device_is_usb3vision (libusb_device *device)
        }
        libusb_free_config_descriptor (config);
 
-       return success;
+       if (!success)
+               return NULL;
+
+       if (libusb_open (device, &device_handle) == LIBUSB_SUCCESS) {
+               unsigned char *manufacturer;
+               unsigned char *product;
+               unsigned char *serial_nbr;
+               int index;
+
+               device_ids = g_new0 (ArvInterfaceDeviceIds, 1);
+
+               manufacturer = g_malloc0 (256);
+               product = g_malloc0 (256);
+               serial_nbr = g_malloc0 (256);
+
+               index = desc.iManufacturer;
+               if (index > 0)
+                       libusb_get_string_descriptor_ascii (device_handle, index, manufacturer, 256);
+               index = desc.iProduct;
+               if (index > 0)
+                       libusb_get_string_descriptor_ascii (device_handle, index, product, 256);
+               index = desc.iSerialNumber;
+               if (index > 0)
+                       libusb_get_string_descriptor_ascii (device_handle, index, serial_nbr, 256);
+
+               device_ids->device = g_strdup_printf ("%s-%s", manufacturer, serial_nbr);
+               device_ids->physical = g_strdup_printf ("FIXME");
+               device_ids->address = g_strdup_printf ("FIXME");
+
+               arv_str_strip (device_ids->device, ARV_DEVICE_NAME_ILLEGAL_CHARACTERS, 
ARV_DEVICE_NAME_REPLACEMENT_CHARACTER);
+
+               g_free (manufacturer);
+               g_free (product);
+               g_free (serial_nbr);
+
+               libusb_close (device_handle);
+       }
+
+       return device_ids;
 }
 
 static void
@@ -138,11 +179,17 @@ arv_uv_interface_update_device_list (ArvInterface *interface, GArray *device_ids
        if (count < 0)
                return;
 
-       for (i = 0; i < count; i++)
-               if (_usb_device_is_usb3vision (devices[i]))
+       for (i = 0; i < count; i++) {
+               ArvInterfaceDeviceIds *ids;
+
+               ids = _usb_device_to_device_ids (devices[i]);
+               if (ids != NULL) {
                    uv_count++;
+                   g_array_append_val (device_ids, ids);
+               }
+       }
 
-       arv_debug_interface ("Found %d USB3Vision device%s (among %d USB device%ss)\n",
+       arv_debug_interface ("Found %d USB3Vision device%s (among %d USB device%ss)",
                             uv_count , uv_count > 1 ? "s" : "",
                             count, count > 1 ? "s" : "");