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Expose simple API to select a single USB device

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The caller just wants a single device. Handle all cases and error
messages internally.

PR #3005 <https://github.com/Genymobile/scrcpy/pull/3005>
This commit is contained in:
Romain Vimont
2022-02-05 19:12:59 +01:00
parent b88c4aa75e
commit 61969aeb80
4 changed files with 63 additions and 66 deletions
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45
app/src/usb/usb.c
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@@ -96,7 +96,7 @@ sc_usb_devices_destroy_all(struct sc_usb_device *usb_devices, size_t count) {
}
}
ssize_t
static ssize_t
sc_usb_find_devices(struct sc_usb *usb, const char *serial,
struct sc_usb_device *devices, size_t len) {
libusb_device **list;
@@ -119,6 +119,49 @@ sc_usb_find_devices(struct sc_usb *usb, const char *serial,
return idx;
}
bool
sc_usb_select_device(struct sc_usb *usb, const char *serial,
struct sc_usb_device *out_device) {
struct sc_usb_device usb_devices[16];
ssize_t count = sc_usb_find_devices(usb, serial, usb_devices,
ARRAY_LEN(usb_devices));
if (count == -1) {
LOGE("Could not list USB devices");
return false;
}
if (count == 0) {
if (serial) {
LOGE("Could not find USB device %s", serial);
} else {
LOGE("Could not find any USB device");
}
return false;
}
if (count > 1) {
if (serial) {
LOGE("Multiple (%" SC_PRIsizet ") USB devices with serial %s:",
count, serial);
} else {
LOGE("Multiple (%" SC_PRIsizet ") USB devices:", count);
}
for (size_t i = 0; i < (size_t) count; ++i) {
struct sc_usb_device *d = &usb_devices[i];
LOGE(" %-18s (%04" PRIx16 ":%04" PRIx16 ") %s %s",
d->serial, d->vid, d->pid, d->manufacturer, d->product);
}
LOGE("Select a device via -s (--serial)");
sc_usb_devices_destroy_all(usb_devices, count);
return false;
}
assert(count == 1);
// Move usb_devices[0] into out_device (do not destroy usb_devices[0])
*out_device = usb_devices[0];
return true;
}
bool
sc_usb_init(struct sc_usb *usb) {
usb->handle = NULL;