bool USBAudioDevice::SetSampleRateInternal(int freq)
{
UINT lengthTransferred = 0;
bool retValue = FALSE;
USBAudioClockSource* clockSource = FindClockSource(freq);
if(!clockSource)
{
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Not found clock source for sample rate %d\n", freq);
#endif
return FALSE;
}
if(UsbClaimInterface(clockSource->m_interface->Descriptor().bInterfaceNumber))
{
retValue = SendUsbControl(BMREQUEST_DIR_HOST_TO_DEVICE, BMREQUEST_TYPE_CLASS, BMREQUEST_RECIPIENT_INTERFACE,
AUDIO_CS_REQUEST_CUR, AUDIO_CS_CONTROL_SAM_FREQ << 8, (clockSource->m_clockSource.bClockID << 8) + clockSource->m_interface->Descriptor().bInterfaceNumber,
(unsigned char*)&freq, sizeof(freq), &lengthTransferred);
if(!retValue)
{
m_errorCode = GetLastErrorInternal();
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Set samplerate %d failed. ErrorCode: %08Xh\n", freq, m_errorCode);
#endif
}
else
if(lengthTransferred != 4)
{
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Set samplerate %d failed. Wrong transfer length\n", freq);
#endif
retValue = FALSE;
}
UsbReleaseInterface(clockSource->m_interface->Descriptor().bInterfaceNumber);
}
else
{
m_errorCode = GetLastErrorInternal();
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Claim interface %d failed. ErrorCode: %08Xh\n", clockSource->m_interface->Descriptor().bInterfaceNumber, m_errorCode);
#endif
}
return retValue;
}
int USBAudioDevice::GetSampleRateInternal(int interfaceNum, int clockID)
{
UINT lengthTransferred = 0;
int freq = 0;
if(UsbClaimInterface(interfaceNum))
{
if(!SendUsbControl( BMREQUEST_DIR_DEVICE_TO_HOST, BMREQUEST_TYPE_CLASS, BMREQUEST_RECIPIENT_INTERFACE,
AUDIO_CS_REQUEST_CUR, AUDIO_CS_CONTROL_SAM_FREQ << 8, (clockID << 8) + interfaceNum,
(unsigned char*)&freq, sizeof(freq), &lengthTransferred))
{
freq = 0;
m_errorCode = GetLastErrorInternal();
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Get samplerate %d failed. ErrorCode: %08Xh\n", freq, m_errorCode);
#endif
}
else
if(lengthTransferred != 4)
{
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Get samplerate %d failed. Wrong transfer length\n", freq);
#endif
freq = 0;
}
UsbReleaseInterface(interfaceNum);
}
else
{
m_errorCode = GetLastErrorInternal();
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Claim interface %d failed. ErrorCode: %08Xh\n", interfaceNum, m_errorCode);
#endif
}
return freq;
}
bool USBAudioDevice::CheckSampleRate(USBAudioClockSource* clocksrc, int newfreq)
{
unsigned char buff[64];
UINT lengthTransferred = 0;
bool retVal = FALSE;
if(UsbClaimInterface(clocksrc->m_interface->Descriptor().bInterfaceNumber))
{
bool retValue = SendUsbControl(BMREQUEST_DIR_DEVICE_TO_HOST, BMREQUEST_TYPE_CLASS, BMREQUEST_RECIPIENT_INTERFACE,
AUDIO_CS_REQUEST_RANGE, AUDIO_CS_CONTROL_SAM_FREQ << 8, (clocksrc->m_clockSource.bClockID << 8) + clocksrc->m_interface->Descriptor().bInterfaceNumber,
buff, sizeof(buff), &lengthTransferred);
if(!retValue)
{
m_errorCode = GetLastErrorInternal();
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Enumerate samplerate failed. ErrorCode: %08Xh\n", m_errorCode);
#endif
}
else
if(lengthTransferred <= 2)
{
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Enumerate samplerate failed. Wrong transfer length\n");
#endif
retValue = FALSE;
}
unsigned short length = *((unsigned short*)buff);
struct sample_rate_triplets *triplets = (sample_rate_triplets *)(buff + 2);
#ifdef _ENABLE_TRACE
//debugPrintf("ASIOUAC: Enumerate samplerate OK\n");
#endif
for(int i = 0; i < length; i++)
{
if(triplets[i].res_freq == 0)
{
if(newfreq == triplets[i].min_freq)
retVal = TRUE;
}
else
for(int freq = triplets[i].min_freq; freq <= triplets[i].max_freq; freq += triplets[i].res_freq)
{
#ifdef _ENABLE_TRACE
//debugPrintf("ASIOUAC: Supported freq: %d\n", freq);
#endif
if(newfreq == freq)
retVal = TRUE;
}
}
UsbReleaseInterface(clocksrc->m_interface->Descriptor().bInterfaceNumber);
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Sample freq: %d %s\n", newfreq, retVal ? "is supported" : "isn't supported");
#endif
}
else
{
m_errorCode = GetLastErrorInternal();
#ifdef _ENABLE_TRACE
debugPrintf("ASIOUAC: Claim interface %d failed. ErrorCode: %08Xh\n", clocksrc->m_interface->Descriptor().bInterfaceNumber, m_errorCode);
#endif
}
return retVal;
}
bool USBDevice::InitDevice()
{
BYTE configDescriptorBuffer[4096];
ULONG lengthTransferred;
m_deviceMutex = CreateMutex(NULL, FALSE, "Global\\ASIOUAC2");
if(GetLastError() == ERROR_ALREADY_EXISTS)
{
#ifdef _DEBUG
debugPrintf("ASIOUAC: Can't start device! Device already used!\n");
#endif
if(m_deviceMutex)
{
CloseHandle(m_deviceMutex);
m_deviceMutex = NULL;
m_errorCode = ERROR_BUSY;
}
return FALSE;
}
FreeDevice();
InitDescriptors();
m_usbDeviceHandle = FindDevice();
if(m_usbDeviceHandle == NULL)
return FALSE;
lengthTransferred = sizeof(configDescriptorBuffer);
if(!UsbK_QueryDeviceInformation( m_usbDeviceHandle, DEVICE_SPEED, &lengthTransferred, configDescriptorBuffer))
{
m_errorCode = GetLastError();
#ifdef _DEBUG
debugPrintf("ASIOUAC: UsbK_QueryDeviceInformation failed. ErrorCode: %08Xh\n", m_errorCode);
#endif
UsbK_Free(m_usbDeviceHandle);
m_usbDeviceHandle = NULL;
return FALSE;
}
m_deviceSpeed = (int)configDescriptorBuffer[0];
#ifdef _DEBUG
if(m_deviceSpeed == HighSpeed)
debugPrintf("ASIOUAC: Device speed: high\n");
else
debugPrintf("ASIOUAC: Device speed: low/full\n");
#endif
if(!UsbK_GetDescriptor(m_usbDeviceHandle, USB_DESCRIPTOR_TYPE_DEVICE, 0, 0, configDescriptorBuffer, sizeof(configDescriptorBuffer), &lengthTransferred))
{
m_errorCode = GetLastError();
#ifdef _DEBUG
debugPrintf("ASIOUAC: Get device descriptor failed. ErrorCode: %08Xh\n", m_errorCode);
#endif
UsbK_Free(m_usbDeviceHandle);
m_usbDeviceHandle = NULL;
return FALSE;
}
memcpy(&m_deviceDescriptor, configDescriptorBuffer, sizeof(USB_DEVICE_DESCRIPTOR));
if(SendUsbControl(BMREQUEST_DIR_DEVICE_TO_HOST, BMREQUEST_TYPE_STANDARD, BMREQUEST_RECIPIENT_DEVICE,
USB_REQUEST_GET_DESCRIPTOR, (USB_DESCRIPTOR_TYPE_CONFIGURATION << 8), 0,
configDescriptorBuffer, sizeof(configDescriptorBuffer), &lengthTransferred))
{
ParseDescriptors(configDescriptorBuffer, lengthTransferred);
return m_usbDeviceHandle != NULL;
}
else
{
m_errorCode = GetLastError();
#ifdef _DEBUG
debugPrintf("ASIOUAC: Get config descriptor failed. ErrorCode: %08Xh\n", m_errorCode);
#endif
UsbK_Free(m_usbDeviceHandle);
m_usbDeviceHandle = NULL;
return FALSE;
}
}
