// FindDevices finds likely MTP devices without opening them.
func FindDevices(c *usb.Context) ([]*Device, error) {
l, err := c.GetDeviceList()
if err != nil {
return nil, err
}
var cands []*Device
for _, d := range l {
dd, err := d.GetDeviceDescriptor()
if err != nil {
continue
}
for i := byte(0); i < dd.NumConfigurations; i++ {
cdecs, err := d.GetConfigDescriptor(i)
if err != nil {
return nil, fmt.Errorf("GetConfigDescriptor %d: %v", i, err)
}
for _, iface := range cdecs.Interfaces {
for _, a := range iface.AltSetting {
if len(a.EndPoints) != 3 {
continue
}
m := Device{}
for _, s := range a.EndPoints {
switch {
case s.Direction() == usb.ENDPOINT_IN && s.TransferType() == usb.TRANSFER_TYPE_INTERRUPT:
m.eventEp = s.EndpointAddress
case s.Direction() == usb.ENDPOINT_IN && s.TransferType() == usb.TRANSFER_TYPE_BULK:
m.fetchEp = s.EndpointAddress
case s.Direction() == usb.ENDPOINT_OUT && s.TransferType() == usb.TRANSFER_TYPE_BULK:
m.sendEp = s.EndpointAddress
}
}
if m.sendEp > 0 && m.fetchEp > 0 && m.eventEp > 0 {
m.devDescr = *dd
m.ifaceDescr = a
m.dev = d.Ref()
m.configIndex = i
cands = append(cands, &m)
}
}
}
}
}
l.Done()
return cands, nil
}
// FindDevices finds likely MTP devices without opening them.
func FindDevices(c *usb.Context) ([]*Device, error) {
l, err := c.GetDeviceList()
if err != nil {
return nil, err
}
var cands []*Device
for _, d := range l {
cand := candidateFromDeviceDescriptor(d)
if cand != nil {
cands = append(cands, cand)
}
}
l.Done()
return cands, nil
}