//! Destructor, de-initializes, frees memory allocated for buffers, etc.
UsbInterface::~UsbInterface()
{
try {
closeUsb(); //lint !e534
#ifdef USE_WINUSB
::CloseHandle(d->m_quitEvent); //lint !e534
for (int i = 0; i < d->m_oCount; ++i)
::CloseHandle(d->m_waitEvents[i]); //lint !e534
::DeleteCriticalSection(&d->m_mutex);
#endif
delete d;
} catch(...)
{}
}
/*! \brief Close the USB communication port.
*/
XsResultValue UsbInterface::close(void)
{
return closeUsb();
}
/**
* try to find a android accessory device, and try to open it.
*
* @return handle of the accessory device, or null if none are found.
*/
libusb_device_handle* findAndInitAccessory(
libusb_context* ctx,
const char* manufacturer,
const char* modelName,
const char* description,
const char* version,
const char* uri,
const char* serialNumber)
{
libusb_device** list;
#ifdef DEBUG
printf("libAndroidAccessory: Enumerating devices\n");
#endif
ssize_t cnt = libusb_get_device_list(ctx, &list);
int i, j;
struct libusb_device_descriptor desc;
libusb_device_handle* handle = NULL;
for (i = 0; i < cnt; i++) {
libusb_device* tmpdevice = list[i];
if (libusb_get_device_descriptor(tmpdevice, &desc) < 0) {
continue;
}
debugDescriptor(&desc);
for (j = 0; j < (sizeof vendors / sizeof *vendors); ++j)
{
if (desc.idVendor == vendors[j]) {
#ifdef DEBUG
printf("libAndroidAccessory: Supported vendor Id found: %04hx\n", desc.idVendor);
#endif
// Check to see if the device is already in accessory mode
if(desc.idVendor == GOOGLE)
{
switch(desc.idProduct)
{
case ACCESSORY:
case ACCESSORY_ADB:
case ACCESSORY_AUDIO:
case ACCESSORY_AUDIO_ADB:
#ifdef DEBUG
printf("libAndroidAccessory: Connected device already in accessory mode, continuing!\n");
#endif
; // Do not remove this empty statement. Removing it might make gcc refuse to compile our project.
int errorCode = libusb_open(tmpdevice, &handle);
if ( errorCode != 0 )
{
fprintf(stderr, "libAndroidAccessory: %s %d -> %s\n",__FILE__, __LINE__, libusb_error_name(errorCode));
}
determineEndpoints(tmpdevice);
libusb_release_interface(handle, 0);
libusb_release_interface(handle, 1);
libusb_free_device_list(list, 1);
return handle;
default:
break;
}
}
// We should in no circumstance try to put a accessory in accessory mode. This should filter most of them out.
if (desc.idVendor == GOOGLE && (desc.idProduct >= ACCESSORY && desc.idProduct <= ACCESSORY_AUDIO_ADB) )
{
printf("libAndroidAccessory: Ignoring a device which is already in accessory mode\n");
break;
}
// We're not already in accessory mode, try to send configuration commands.
handle = openUsb(ctx, desc.idVendor, desc.idProduct); //try to open the USB interface
if (handle != NULL) {
int version_supported = -1;
version_supported = checkAndroid(handle);
switch(version_supported) {
case 2:
#ifdef DEBUG
printf("libAndroidAccessory: Android Open Accessory version 2 support detected\n");
#endif
// Fallthrough to next case
/* no break */
case 1:
#ifdef DEBUG
printf("libAndroidAccessory: Android Open Accessory version 1 support detected\n");
printf("libAndroidAccessory: Trying to setup accessory mode\n");
#endif
handle = setupAccessory(
manufacturer,
modelName,
description,
version,
uri,
serialNumber,
handle); //try to set-up Accessory
libusb_free_device_list(list, 1);
closeUsb(handle);
return handle = NULL;
break;
default:
#ifdef DEBUG
printf("libAndroidAccessory: Unsupported or no Android device support\n");
#endif
closeUsb(handle);
handle = NULL;
break;
}
}
}
}
}
libusb_free_device_list(list, 1);
// Upon reaching this location we didn't find any supported android device, so we return NULL
return NULL;
}