MMRESULT
SetNt4WaveDeviceFormat(
IN PSOUND_DEVICE_INSTANCE SoundDeviceInstance,
IN DWORD DeviceId,
IN LPWAVEFORMATEX Format,
IN DWORD FormatSize)
{
MMRESULT Result;
HANDLE Handle;
VALIDATE_MMSYS_PARAMETER( IsValidSoundDeviceInstance(SoundDeviceInstance) );
VALIDATE_MMSYS_PARAMETER( Format );
VALIDATE_MMSYS_PARAMETER( FormatSize >= sizeof(WAVEFORMATEX) );
Result = GetSoundDeviceInstanceHandle(SoundDeviceInstance, &Handle);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
SND_TRACE(L"Setting wave device format on handle %x\n", Handle);
Result = SyncOverlappedDeviceIoControl(Handle,
IOCTL_WAVE_SET_FORMAT,
(LPVOID) Format,
FormatSize,
NULL,
0,
NULL);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
return MMSYSERR_NOERROR;
}
MMRESULT
MmeGetLineInfo(
IN UINT DeviceId,
IN UINT Message,
IN DWORD_PTR PrivateHandle,
IN DWORD_PTR Parameter1,
IN DWORD_PTR Parameter2)
{
MMRESULT Result;
PSOUND_DEVICE_INSTANCE SoundDeviceInstance;
PSOUND_DEVICE SoundDevice;
PMMFUNCTION_TABLE FunctionTable;
//SND_TRACE(L"Getting mixer info %u\n", Message);
if ( PrivateHandle == 0 )
{
Result = GetSoundDevice(MIXER_DEVICE_TYPE, DeviceId, &SoundDevice);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
Result = GetSoundDeviceFunctionTable(SoundDevice, &FunctionTable);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
Result = FunctionTable->QueryMixerInfo(NULL, DeviceId, Message, (LPVOID)Parameter1, Parameter2);
return Result;
}
VALIDATE_MMSYS_PARAMETER( PrivateHandle );
SoundDeviceInstance = (PSOUND_DEVICE_INSTANCE) PrivateHandle;
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
Result = GetSoundDeviceFunctionTable(SoundDevice, &FunctionTable);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
if ( ! FunctionTable->QueryMixerInfo )
return MMSYSERR_NOTSUPPORTED;
Result = FunctionTable->QueryMixerInfo(SoundDeviceInstance, DeviceId, Message, (LPVOID)Parameter1, Parameter2);
return Result;
}
MMRESULT
WdmAudGetNumWdmDevsByLegacy(
IN MMDEVICE_TYPE DeviceType,
OUT DWORD* DeviceCount)
{
MMRESULT Result;
WDMAUD_DEVICE_INFO DeviceInfo;
VALIDATE_MMSYS_PARAMETER( KernelHandle != INVALID_HANDLE_VALUE );
VALIDATE_MMSYS_PARAMETER( IS_VALID_SOUND_DEVICE_TYPE(DeviceType) );
VALIDATE_MMSYS_PARAMETER( DeviceCount );
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.DeviceType = DeviceType;
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_GETNUMDEVS_TYPE,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( ! MMSUCCESS( Result ) )
{
SND_ERR(L"Call to IOCTL_GETNUMDEVS_TYPE failed\n");
*DeviceCount = 0;
return TranslateInternalMmResult(Result);
}
*DeviceCount = DeviceInfo.DeviceCount;
return MMSYSERR_NOERROR;
}
MMRESULT
QueryWaveDeviceFormatSupport(
IN PSOUND_DEVICE SoundDevice,
IN LPWAVEFORMATEX Format,
IN DWORD FormatSize)
{
MMRESULT Result;
MMDEVICE_TYPE DeviceType;
PMMFUNCTION_TABLE FunctionTable;
SND_TRACE(L"Querying wave format support\n");
VALIDATE_MMSYS_PARAMETER( IsValidSoundDevice(SoundDevice) );
VALIDATE_MMSYS_PARAMETER( Format );
VALIDATE_MMSYS_PARAMETER( FormatSize >= sizeof(WAVEFORMATEX) );
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
/* Ensure we have a wave device (TODO: check if this applies to wavein as well) */
VALIDATE_MMSYS_PARAMETER( IS_WAVE_DEVICE_TYPE(DeviceType) );
/* Obtain the function table */
Result = GetSoundDeviceFunctionTable(SoundDevice, &FunctionTable);
SND_ASSERT( Result == MMSYSERR_NOERROR );
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
if ( ! FunctionTable->QueryWaveFormatSupport )
return MMSYSERR_NOTSUPPORTED;
return FunctionTable->QueryWaveFormatSupport(SoundDevice, Format, FormatSize);
}
MMRESULT
WdmAudGetWavePositionByLegacy(
IN struct _SOUND_DEVICE_INSTANCE* SoundDeviceInstance,
IN MMTIME* Time)
{
MMRESULT Result;
PSOUND_DEVICE SoundDevice;
WDMAUD_DEVICE_INFO DeviceInfo;
MMDEVICE_TYPE DeviceType;
HANDLE Handle;
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
Result = GetSoundDeviceInstanceHandle(SoundDeviceInstance, &Handle);
SND_ASSERT( Result == MMSYSERR_NOERROR );
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.hDevice = Handle;
DeviceInfo.DeviceType = DeviceType;
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_OPEN_WDMAUD,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Time->wType = TIME_BYTES;
Time->u.cb = (DWORD)DeviceInfo.u.Position;
return MMSYSERR_NOERROR;
}
MMRESULT
WdmAudCommitWaveBufferByMMixer(
IN PSOUND_DEVICE_INSTANCE SoundDeviceInstance,
IN PVOID OffsetPtr,
IN DWORD Length,
IN PSOUND_OVERLAPPED Overlap,
IN LPOVERLAPPED_COMPLETION_ROUTINE CompletionRoutine)
{
PSOUND_DEVICE SoundDevice;
MMDEVICE_TYPE DeviceType;
MMRESULT Result;
LPIO_PACKET Packet;
HANDLE hThread;
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
Packet = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IO_PACKET));
if ( ! Packet )
{
/* no memory */
return MMSYSERR_NOMEM;
}
/* setup stream packet */
Packet->Header.Size = sizeof(KSSTREAM_HEADER);
Packet->Header.PresentationTime.Numerator = 1;
Packet->Header.PresentationTime.Denominator = 1;
Packet->Header.Data = OffsetPtr;
Packet->Header.FrameExtent = Length;
Packet->hDevice = SoundDeviceInstance->Handle;
Packet->Overlap = Overlap;
Packet->CompletionRoutine = CompletionRoutine;
Packet->IoCtl = (DeviceType == WAVE_OUT_DEVICE_TYPE ? IOCTL_KS_WRITE_STREAM : IOCTL_KS_READ_STREAM);
if (DeviceType == WAVE_OUT_DEVICE_TYPE)
{
Packet->Header.DataUsed = Length;
}
hThread = CreateThread(NULL, 0, IoStreamingThread, (LPVOID)Packet, 0, NULL);
if (hThread == NULL)
{
/* error */
return MMSYSERR_ERROR;
}
CloseHandle(hThread);
return MMSYSERR_NOERROR;
}
/*
Querying/setting the format of a wave device. Querying format support
requires us to first open the device, whereas setting format is done
on an already opened device.
*/
MMRESULT
QueryNt4WaveDeviceFormatSupport(
IN PSOUND_DEVICE SoundDevice,
IN LPWAVEFORMATEX Format,
IN DWORD FormatSize)
{
MMRESULT Result;
HANDLE Handle;
SND_TRACE(L"NT4 wave format support querying routine called\n");
VALIDATE_MMSYS_PARAMETER( IsValidSoundDevice(SoundDevice) );
VALIDATE_MMSYS_PARAMETER( Format );
VALIDATE_MMSYS_PARAMETER( FormatSize >= sizeof(WAVEFORMATEX) );
/* Get the device path */
Result = OpenNt4KernelSoundDevice(SoundDevice,
FALSE,
&Handle);
if ( ! MMSUCCESS(Result) )
{
SND_ERR(L"Unable to open kernel sound device\n");
return TranslateInternalMmResult(Result);
}
Result = SyncOverlappedDeviceIoControl(Handle,
IOCTL_WAVE_QUERY_FORMAT,
(LPVOID) Format,
FormatSize,
NULL,
0,
NULL);
if ( ! MMSUCCESS(Result) )
{
SND_ERR(L"Sync overlapped I/O failed - MMSYS_ERROR %d\n", Result);
Result = TranslateInternalMmResult(Result);
}
CloseKernelSoundDevice(Handle);
return MMSYSERR_NOERROR;
}
MMRESULT
WdmAudSetMixerDeviceFormatByLegacy(
IN PSOUND_DEVICE_INSTANCE Instance,
IN DWORD DeviceId,
IN PWAVEFORMATEX WaveFormat,
IN DWORD WaveFormatSize)
{
MMRESULT Result;
WDMAUD_DEVICE_INFO DeviceInfo;
HANDLE hThread;
Instance->hNotifyEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
if ( ! Instance->hNotifyEvent )
return MMSYSERR_NOMEM;
if (Instance->Handle != NULL)
{
/* device is already open */
return MMSYSERR_NOERROR;
}
Instance->hStopEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
if ( ! Instance->hStopEvent )
return MMSYSERR_NOMEM;
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.DeviceType = MIXER_DEVICE_TYPE;
DeviceInfo.DeviceIndex = DeviceId;
DeviceInfo.u.hNotifyEvent = Instance->hNotifyEvent;
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_OPEN_WDMAUD,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( ! MMSUCCESS(Result) )
{
CloseHandle(Instance->hNotifyEvent);
CloseHandle(Instance->hStopEvent);
return TranslateInternalMmResult(Result);
}
hThread = CreateThread(NULL, 0, MixerEventThreadRoutine, (LPVOID)Instance, 0, NULL);
if ( hThread )
{
CloseHandle(hThread);
}
/* Store sound device handle instance handle */
Instance->Handle = (PVOID)DeviceInfo.hDevice;
return MMSYSERR_NOERROR;
}
MMRESULT
SetWaveDeviceFormat(
IN PSOUND_DEVICE_INSTANCE SoundDeviceInstance,
IN DWORD DeviceId,
IN LPWAVEFORMATEX Format,
IN DWORD FormatSize)
{
MMRESULT Result;
MMDEVICE_TYPE DeviceType;
PMMFUNCTION_TABLE FunctionTable;
PSOUND_DEVICE SoundDevice;
SND_TRACE(L"Setting wave format\n");
VALIDATE_MMSYS_PARAMETER( IsValidSoundDeviceInstance(SoundDeviceInstance) );
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
if (DeviceType == WAVE_IN_DEVICE_TYPE || DeviceType == WAVE_OUT_DEVICE_TYPE)
{
VALIDATE_MMSYS_PARAMETER( Format );
VALIDATE_MMSYS_PARAMETER( FormatSize >= sizeof(WAVEFORMATEX) );
}
/* Ensure we have a wave device (TODO: check if this applies to wavein as well) */
VALIDATE_MMSYS_PARAMETER( IS_WAVE_DEVICE_TYPE(DeviceType) || IS_MIDI_DEVICE_TYPE(DeviceType) || IS_MIXER_DEVICE_TYPE(DeviceType));
/* Obtain the function table */
Result = GetSoundDeviceFunctionTable(SoundDevice, &FunctionTable);
SND_ASSERT( Result == MMSYSERR_NOERROR );
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
if ( ! FunctionTable->SetWaveFormat )
return MMSYSERR_NOTSUPPORTED;
return FunctionTable->SetWaveFormat(SoundDeviceInstance, DeviceId, Format, FormatSize);
}
MMRESULT
UnlistSoundDeviceInstance(
IN PSOUND_DEVICE_INSTANCE SoundDeviceInstance)
{
MMRESULT Result;
PSOUND_DEVICE SoundDevice;
PSOUND_DEVICE_INSTANCE CurrentInstance, PreviousInstance;
VALIDATE_MMSYS_PARAMETER( IsValidSoundDeviceInstance(SoundDeviceInstance) );
SND_TRACE(L"Unlisting sound device instance\n");
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
SND_ASSERT( MMSUCCESS(Result) );
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
PreviousInstance = NULL;
CurrentInstance = SoundDevice->HeadInstance;
while ( CurrentInstance )
{
if ( CurrentInstance == SoundDeviceInstance )
{
if ( ! PreviousInstance )
{
/* This is the head node */
SoundDevice->HeadInstance = SoundDevice->HeadInstance->Next;
}
else
{
/* There are nodes before this one - cut ours out */
PreviousInstance->Next = CurrentInstance->Next;
}
if ( ! CurrentInstance->Next )
{
/* This is the tail node */
SoundDevice->TailInstance = PreviousInstance;
}
}
PreviousInstance = CurrentInstance;
CurrentInstance = CurrentInstance->Next;
}
return MMSYSERR_NOERROR;
}
MMRESULT
WdmAudSetWaveStateByLegacy(
IN struct _SOUND_DEVICE_INSTANCE* SoundDeviceInstance,
IN BOOL bStart)
{
MMRESULT Result;
PSOUND_DEVICE SoundDevice;
WDMAUD_DEVICE_INFO DeviceInfo;
MMDEVICE_TYPE DeviceType;
HANDLE Handle;
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
Result = GetSoundDeviceInstanceHandle(SoundDeviceInstance, &Handle);
SND_ASSERT( Result == MMSYSERR_NOERROR );
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.hDevice = Handle;
DeviceInfo.DeviceType = DeviceType;
if (bStart)
DeviceInfo.u.State = KSSTATE_RUN;
else
DeviceInfo.u.State = KSSTATE_PAUSE;
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_SETDEVICE_STATE,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
return Result;
}
MMRESULT
WdmAudCloseSoundDeviceByMMixer(
IN struct _SOUND_DEVICE_INSTANCE* SoundDeviceInstance,
IN PVOID Handle)
{
MMDEVICE_TYPE DeviceType;
PSOUND_DEVICE SoundDevice;
MMRESULT Result;
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
if (DeviceType == MIXER_DEVICE_TYPE)
{
/* no op */
return MMSYSERR_NOERROR;
}
else if (DeviceType == WAVE_IN_DEVICE_TYPE || DeviceType == WAVE_OUT_DEVICE_TYPE)
{
/* make sure the pin is stopped */
MMixerSetWaveStatus(&MixerContext, SoundDeviceInstance->Handle, KSSTATE_PAUSE);
MMixerSetWaveStatus(&MixerContext, SoundDeviceInstance->Handle, KSSTATE_ACQUIRE);
MMixerSetWaveStatus(&MixerContext, SoundDeviceInstance->Handle, KSSTATE_STOP);
CloseHandle(Handle);
return MMSYSERR_NOERROR;
}
/* midi is not supported */
return MMSYSERR_ERROR;
}
/*
Convenience routine for getting the path of a device and opening it.
*/
MMRESULT
OpenNt4KernelSoundDevice(
IN PSOUND_DEVICE SoundDevice,
IN BOOLEAN ReadOnly,
OUT PHANDLE Handle)
{
PWSTR Path;
MMRESULT Result;
VALIDATE_MMSYS_PARAMETER( IsValidSoundDevice(SoundDevice) );
VALIDATE_MMSYS_PARAMETER( Handle );
Result = GetSoundDeviceIdentifier(SoundDevice, (PVOID*) &Path);
if ( ! MMSUCCESS(Result) )
{
SND_ERR(L"Unable to get sound device path");
return TranslateInternalMmResult(Result);
}
SND_ASSERT( Path );
return OpenKernelSoundDeviceByName(Path, ReadOnly, Handle);
}
MMRESULT
WdmAudSetWaveDeviceFormatByMMixer(
IN PSOUND_DEVICE_INSTANCE Instance,
IN DWORD DeviceId,
IN PWAVEFORMATEX WaveFormat,
IN DWORD WaveFormatSize)
{
MMDEVICE_TYPE DeviceType;
PSOUND_DEVICE SoundDevice;
MMRESULT Result;
BOOL bWaveIn;
Result = GetSoundDeviceFromInstance(Instance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
bWaveIn = (DeviceType == WAVE_IN_DEVICE_TYPE ? TRUE : FALSE);
if (MMixerOpenWave(&MixerContext, DeviceId, bWaveIn, WaveFormat, NULL, NULL, &Instance->Handle) == MM_STATUS_SUCCESS)
{
if (DeviceType == WAVE_OUT_DEVICE_TYPE)
{
MMixerSetWaveStatus(&MixerContext, Instance->Handle, KSSTATE_ACQUIRE);
MMixerSetWaveStatus(&MixerContext, Instance->Handle, KSSTATE_PAUSE);
MMixerSetWaveStatus(&MixerContext, Instance->Handle, KSSTATE_RUN);
}
return MMSYSERR_NOERROR;
}
return MMSYSERR_ERROR;
}
MMRESULT
CreateSoundThread(
OUT PSOUND_THREAD* Thread)
{
MMRESULT Result;
PSOUND_THREAD NewThread;
VALIDATE_MMSYS_PARAMETER( Thread );
NewThread = AllocateStruct(SOUND_THREAD);
if ( ! NewThread )
return MMSYSERR_NOMEM;
/* Prepare the events we'll be using to sync. everything */
Result = CreateSoundThreadEvents(&NewThread->Events.Ready,
&NewThread->Events.Request,
&NewThread->Events.Done);
if ( ! MMSUCCESS(Result) )
{
FreeMemory(NewThread);
return TranslateInternalMmResult(Result);
}
SND_TRACE(L"Creating a sound thread\n");
NewThread->Handle = CreateThread(NULL,
0,
&SoundThreadMain,
(LPVOID) NewThread,
CREATE_SUSPENDED,
NULL);
/* Something went wrong, bail out! */
if ( NewThread->Handle == INVALID_HANDLE_VALUE )
{
SND_ERR(L"Sound thread creation failed!\n");
DestroySoundThreadEvents(NewThread->Events.Ready,
NewThread->Events.Request,
NewThread->Events.Done);
FreeMemory(NewThread);
return Win32ErrorToMmResult(GetLastError());
}
/* Wake the thread up */
if ( ResumeThread(NewThread->Handle) == -1 )
{
SND_ERR(L"Failed to resume thread!\n");
CloseHandle(NewThread->Handle);
DestroySoundThreadEvents(NewThread->Events.Ready,
NewThread->Events.Request,
NewThread->Events.Done);
FreeMemory(NewThread);
return Win32ErrorToMmResult(GetLastError());
}
/* If all is well we can now give the thread to the caller */
*Thread = NewThread;
return MMSYSERR_NOERROR;
}
MMRESULT
WdmAudGetCapabilitiesByLegacy(
IN PSOUND_DEVICE SoundDevice,
IN DWORD DeviceId,
OUT PVOID Capabilities,
IN DWORD CapabilitiesSize)
{
MMRESULT Result;
MMDEVICE_TYPE DeviceType;
WDMAUD_DEVICE_INFO DeviceInfo;
SND_ASSERT( SoundDevice );
SND_ASSERT( Capabilities );
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
if ( ! MMSUCCESS(Result) )
return Result;
SND_TRACE(L"WDMAUD - GetWdmDeviceCapabilities DeviceType %u DeviceId %u\n", DeviceType, DeviceId);
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.DeviceType = DeviceType;
DeviceInfo.DeviceIndex = DeviceId;
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_GETCAPABILITIES,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
/* This is pretty much a big hack right now */
switch ( DeviceType )
{
case MIXER_DEVICE_TYPE:
{
LPMIXERCAPSW MixerCaps = (LPMIXERCAPSW) Capabilities;
DeviceInfo.u.MixCaps.szPname[MAXPNAMELEN-1] = L'\0';
CopyWideString(MixerCaps->szPname, DeviceInfo.u.MixCaps.szPname);
MixerCaps->cDestinations = DeviceInfo.u.MixCaps.cDestinations;
MixerCaps->fdwSupport = DeviceInfo.u.MixCaps.fdwSupport;
MixerCaps->vDriverVersion = DeviceInfo.u.MixCaps.vDriverVersion;
MixerCaps->wMid = DeviceInfo.u.MixCaps.wMid;
MixerCaps->wPid = DeviceInfo.u.MixCaps.wPid;
break;
}
case WAVE_OUT_DEVICE_TYPE :
{
LPWAVEOUTCAPSW WaveOutCaps = (LPWAVEOUTCAPSW) Capabilities;
DeviceInfo.u.WaveOutCaps.szPname[MAXPNAMELEN-1] = L'\0';
WaveOutCaps->wMid = DeviceInfo.u.WaveOutCaps.wMid;
WaveOutCaps->wPid = DeviceInfo.u.WaveOutCaps.wPid;
WaveOutCaps->vDriverVersion = DeviceInfo.u.WaveOutCaps.vDriverVersion;
CopyWideString(WaveOutCaps->szPname, DeviceInfo.u.WaveOutCaps.szPname);
WaveOutCaps->dwFormats = DeviceInfo.u.WaveOutCaps.dwFormats;
WaveOutCaps->wChannels = DeviceInfo.u.WaveOutCaps.wChannels;
WaveOutCaps->dwSupport = DeviceInfo.u.WaveOutCaps.dwSupport;
break;
}
case WAVE_IN_DEVICE_TYPE :
{
LPWAVEINCAPSW WaveInCaps = (LPWAVEINCAPSW) Capabilities;
DeviceInfo.u.WaveInCaps.szPname[MAXPNAMELEN-1] = L'\0';
WaveInCaps->wMid = DeviceInfo.u.WaveInCaps.wMid;
WaveInCaps->wPid = DeviceInfo.u.WaveInCaps.wPid;
WaveInCaps->vDriverVersion = DeviceInfo.u.WaveInCaps.vDriverVersion;
CopyWideString(WaveInCaps->szPname, DeviceInfo.u.WaveInCaps.szPname);
WaveInCaps->dwFormats = DeviceInfo.u.WaveInCaps.dwFormats;
WaveInCaps->wChannels = DeviceInfo.u.WaveInCaps.wChannels;
WaveInCaps->wReserved1 = 0;
break;
}
case MIDI_IN_DEVICE_TYPE :
{
LPMIDIINCAPSW MidiInCaps = (LPMIDIINCAPSW)Capabilities;
DeviceInfo.u.MidiInCaps.szPname[MAXPNAMELEN-1] = L'\0';
MidiInCaps->vDriverVersion = DeviceInfo.u.MidiInCaps.vDriverVersion;
MidiInCaps->wMid = DeviceInfo.u.MidiInCaps.wMid;
MidiInCaps->wPid = DeviceInfo.u.MidiInCaps.wPid;
MidiInCaps->dwSupport = DeviceInfo.u.MidiInCaps.dwSupport;
CopyWideString(MidiInCaps->szPname, DeviceInfo.u.MidiInCaps.szPname);
break;
}
case MIDI_OUT_DEVICE_TYPE :
{
LPMIDIOUTCAPSW MidiOutCaps = (LPMIDIOUTCAPSW)Capabilities;
DeviceInfo.u.MidiOutCaps.szPname[MAXPNAMELEN-1] = L'\0';
MidiOutCaps->vDriverVersion = DeviceInfo.u.MidiOutCaps.vDriverVersion;
MidiOutCaps->wMid = DeviceInfo.u.MidiOutCaps.wMid;
MidiOutCaps->wPid = DeviceInfo.u.MidiOutCaps.wPid;
MidiOutCaps->dwSupport = DeviceInfo.u.MidiOutCaps.dwSupport;
CopyWideString(MidiOutCaps->szPname, DeviceInfo.u.MidiOutCaps.szPname);
break;
}
}
return MMSYSERR_NOERROR;
}
MMRESULT
WdmAudCloseSoundDeviceByLegacy(
IN struct _SOUND_DEVICE_INSTANCE* SoundDeviceInstance,
IN PVOID Handle)
{
WDMAUD_DEVICE_INFO DeviceInfo;
MMRESULT Result;
MMDEVICE_TYPE DeviceType;
PSOUND_DEVICE SoundDevice;
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
if ( OpenCount == 0 )
{
return MMSYSERR_NOERROR;
}
SND_ASSERT( KernelHandle != INVALID_HANDLE_VALUE );
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
if (SoundDeviceInstance->Handle != (PVOID)KernelHandle)
{
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.DeviceType = DeviceType;
DeviceInfo.hDevice = SoundDeviceInstance->Handle;
/* First stop the stream */
if (DeviceType != MIXER_DEVICE_TYPE)
{
DeviceInfo.u.State = KSSTATE_PAUSE;
SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_SETDEVICE_STATE,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
DeviceInfo.u.State = KSSTATE_ACQUIRE;
SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_SETDEVICE_STATE,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
DeviceInfo.u.State = KSSTATE_STOP;
SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_SETDEVICE_STATE,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
}
SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_CLOSE_WDMAUD,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
}
if (DeviceType == MIXER_DEVICE_TYPE)
{
SetEvent(SoundDeviceInstance->hStopEvent);
CloseHandle(SoundDeviceInstance->hStopEvent);
CloseHandle(SoundDeviceInstance->hNotifyEvent);
}
--OpenCount;
if ( OpenCount < 1 )
{
CloseHandle(KernelHandle);
KernelHandle = INVALID_HANDLE_VALUE;
}
return MMSYSERR_NOERROR;
}
/*
Provides an implementation for the "get capabilities" request,
using the standard IOCTLs used by NT4 sound drivers.
*/
MMRESULT
GetNt4SoundDeviceCapabilities(
IN PSOUND_DEVICE SoundDevice,
OUT PVOID Capabilities,
IN DWORD CapabilitiesSize)
{
MMRESULT Result;
MMDEVICE_TYPE DeviceType;
DWORD IoCtl;
HANDLE DeviceHandle;
/* If these are bad there's an internal error with MME-Buddy! */
SND_ASSERT( SoundDevice );
SND_ASSERT( Capabilities );
SND_ASSERT( CapabilitiesSize > 0 );
SND_TRACE(L"NT4 get-capabilities routine called\n");
/* Get the device type */
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
/* Choose the appropriate IOCTL */
if ( IS_WAVE_DEVICE_TYPE(DeviceType) )
{
IoCtl = IOCTL_WAVE_GET_CAPABILITIES;
}
else if ( IS_MIDI_DEVICE_TYPE(DeviceType) )
{
IoCtl = IOCTL_MIDI_GET_CAPABILITIES;
}
else
{
/* FIXME - need to support AUX and mixer devices */
SND_ASSERT( FALSE );
IoCtl = 0;
}
/* Get the capabilities information from the driver */
Result = OpenNt4KernelSoundDevice(SoundDevice, TRUE, &DeviceHandle);
if ( ! MMSUCCESS(Result) )
{
SND_ERR(L"Failed to open device");
return TranslateInternalMmResult(Result);
}
Result = SyncOverlappedDeviceIoControl(DeviceHandle,
IoCtl,
Capabilities,
CapabilitiesSize,
NULL,
0,
NULL);
CloseKernelSoundDevice(DeviceHandle);
if ( ! MMSUCCESS(Result) )
{
SND_ERR(L"Retrieval of capabilities information failed\n");
Result = TranslateInternalMmResult(Result);
}
return Result;
}
MMRESULT
WdmAudSetWaveDeviceFormatByLegacy(
IN PSOUND_DEVICE_INSTANCE Instance,
IN DWORD DeviceId,
IN PWAVEFORMATEX WaveFormat,
IN DWORD WaveFormatSize)
{
MMRESULT Result;
PSOUND_DEVICE SoundDevice;
PVOID Identifier;
WDMAUD_DEVICE_INFO DeviceInfo;
MMDEVICE_TYPE DeviceType;
Result = GetSoundDeviceFromInstance(Instance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Result = GetSoundDeviceIdentifier(SoundDevice, &Identifier);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
if (Instance->Handle != NULL)
{
/* device is already open */
return MMSYSERR_NOERROR;
}
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.DeviceType = DeviceType;
DeviceInfo.DeviceIndex = DeviceId;
DeviceInfo.u.WaveFormatEx.cbSize = sizeof(WAVEFORMATEX); //WaveFormat->cbSize;
DeviceInfo.u.WaveFormatEx.wFormatTag = WaveFormat->wFormatTag;
#ifdef USERMODE_MIXER
DeviceInfo.u.WaveFormatEx.nChannels = 2;
DeviceInfo.u.WaveFormatEx.nSamplesPerSec = 44100;
DeviceInfo.u.WaveFormatEx.nBlockAlign = 4;
DeviceInfo.u.WaveFormatEx.nAvgBytesPerSec = 176400;
DeviceInfo.u.WaveFormatEx.wBitsPerSample = 16;
#else
DeviceInfo.u.WaveFormatEx.nChannels = WaveFormat->nChannels;
DeviceInfo.u.WaveFormatEx.nSamplesPerSec = WaveFormat->nSamplesPerSec;
DeviceInfo.u.WaveFormatEx.nBlockAlign = WaveFormat->nBlockAlign;
DeviceInfo.u.WaveFormatEx.nAvgBytesPerSec = WaveFormat->nAvgBytesPerSec;
DeviceInfo.u.WaveFormatEx.wBitsPerSample = (DeviceInfo.u.WaveFormatEx.nAvgBytesPerSec * 8) / (DeviceInfo.u.WaveFormatEx.nSamplesPerSec * DeviceInfo.u.WaveFormatEx.nChannels);
#endif
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_OPEN_WDMAUD,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
if (WaveFormatSize >= sizeof(WAVEFORMAT))
{
/* Store format */
Instance->WaveFormatEx.wFormatTag = WaveFormat->wFormatTag;
Instance->WaveFormatEx.nChannels = WaveFormat->nChannels;
Instance->WaveFormatEx.nSamplesPerSec = WaveFormat->nSamplesPerSec;
Instance->WaveFormatEx.nBlockAlign = WaveFormat->nBlockAlign;
Instance->WaveFormatEx.nAvgBytesPerSec = WaveFormat->nAvgBytesPerSec;
}
/* store details */
Instance->WaveFormatEx.cbSize = sizeof(WAVEFORMATEX);
Instance->WaveFormatEx.wBitsPerSample = (DeviceInfo.u.WaveFormatEx.nAvgBytesPerSec * 8) / (DeviceInfo.u.WaveFormatEx.nSamplesPerSec * DeviceInfo.u.WaveFormatEx.nChannels);
/* Store sound device handle instance handle */
Instance->Handle = (PVOID)DeviceInfo.hDevice;
/* Now determine framing requirements */
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_GETFRAMESIZE,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( MMSUCCESS(Result) )
{
if (DeviceInfo.u.FrameSize)
{
Instance->FrameSize = DeviceInfo.u.FrameSize * 2;
Instance->BufferCount = WaveFormat->nAvgBytesPerSec / Instance->FrameSize;
SND_TRACE(L"FrameSize %u BufferCount %u\n", Instance->FrameSize, Instance->BufferCount);
}
}
else
{
// use a default of 100 buffers
Instance->BufferCount = 100;
}
/* Now acquire resources */
DeviceInfo.u.State = KSSTATE_ACQUIRE;
SyncOverlappedDeviceIoControl(KernelHandle, IOCTL_SETDEVICE_STATE, (LPVOID) &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), (LPVOID) &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), NULL);
/* pause the pin */
DeviceInfo.u.State = KSSTATE_PAUSE;
SyncOverlappedDeviceIoControl(KernelHandle, IOCTL_SETDEVICE_STATE, (LPVOID) &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), (LPVOID) &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), NULL);
/* start the pin */
DeviceInfo.u.State = KSSTATE_RUN;
SyncOverlappedDeviceIoControl(KernelHandle, IOCTL_SETDEVICE_STATE, (LPVOID) &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), (LPVOID) &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), NULL);
return MMSYSERR_NOERROR;
}
MMRESULT
WdmAudCommitWaveBufferByLegacy(
IN PSOUND_DEVICE_INSTANCE SoundDeviceInstance,
IN PVOID OffsetPtr,
IN DWORD Length,
IN PSOUND_OVERLAPPED Overlap,
IN LPOVERLAPPED_COMPLETION_ROUTINE CompletionRoutine)
{
HANDLE Handle;
MMRESULT Result;
PWDMAUD_DEVICE_INFO DeviceInfo;
PSOUND_DEVICE SoundDevice;
MMDEVICE_TYPE DeviceType;
BOOL Ret;
VALIDATE_MMSYS_PARAMETER( SoundDeviceInstance );
VALIDATE_MMSYS_PARAMETER( OffsetPtr );
VALIDATE_MMSYS_PARAMETER( Overlap );
VALIDATE_MMSYS_PARAMETER( CompletionRoutine );
GetSoundDeviceInstanceHandle(SoundDeviceInstance, &Handle);
SND_ASSERT(Handle);
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
Result = GetSoundDeviceType(SoundDevice, &DeviceType);
SND_ASSERT( Result == MMSYSERR_NOERROR );
DeviceInfo = (PWDMAUD_DEVICE_INFO)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WDMAUD_DEVICE_INFO));
if (!DeviceInfo)
{
// no memory
return MMSYSERR_NOMEM;
}
DeviceInfo->Header.FrameExtent = Length;
if (DeviceType == WAVE_OUT_DEVICE_TYPE)
{
DeviceInfo->Header.DataUsed = Length;
}
DeviceInfo->Header.Data = OffsetPtr;
DeviceInfo->Header.Size = sizeof(WDMAUD_DEVICE_INFO);
DeviceInfo->Header.PresentationTime.Numerator = 1;
DeviceInfo->Header.PresentationTime.Denominator = 1;
DeviceInfo->hDevice = Handle;
DeviceInfo->DeviceType = DeviceType;
// create completion event
Overlap->Standard.hEvent = Handle = CreateEventW(NULL, FALSE, FALSE, NULL);
if (Overlap->Standard.hEvent == NULL)
{
// no memory
HeapFree(GetProcessHeap(), 0, DeviceInfo);
return MMSYSERR_NOMEM;
}
Overlap->OriginalCompletionRoutine = CompletionRoutine;
Overlap->CompletionContext = (PVOID)DeviceInfo;
if (DeviceType == WAVE_OUT_DEVICE_TYPE)
{
Ret = WriteFileEx(KernelHandle, DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), (LPOVERLAPPED)Overlap, LegacyCompletionRoutine);
if (Ret)
WaitForSingleObjectEx (KernelHandle, INFINITE, TRUE);
}
else if (DeviceType == WAVE_IN_DEVICE_TYPE)
{
Ret = ReadFileEx(KernelHandle, DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), (LPOVERLAPPED)Overlap, LegacyCompletionRoutine);
if (Ret)
WaitForSingleObjectEx (KernelHandle, INFINITE, TRUE);
}
// close event handle
CloseHandle(Handle);
return MMSYSERR_NOERROR;
}
MMRESULT
DestroySoundDeviceInstance(
IN PSOUND_DEVICE_INSTANCE SoundDeviceInstance)
{
MMRESULT Result;
PMMFUNCTION_TABLE FunctionTable;
PSOUND_DEVICE SoundDevice;
PVOID Handle;
SND_TRACE(L"Destroying a sound device instance\n");
VALIDATE_MMSYS_PARAMETER( IsValidSoundDeviceInstance(SoundDeviceInstance) );
Result = GetSoundDeviceFromInstance(SoundDeviceInstance, &SoundDevice);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
Result = GetSoundDeviceInstanceHandle(SoundDeviceInstance, &Handle);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
/* Get the "close" routine from the function table, and validate it */
Result = GetSoundDeviceFunctionTable(SoundDevice, &FunctionTable);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
SND_ASSERT( FunctionTable->Close );
if ( FunctionTable->Close == NULL )
{
/* This indicates bad practice, really! If you can open, why not close?! */
return MMSYSERR_NOTSUPPORTED;
}
/* Stop the streaming thread */
if ( SoundDeviceInstance->Thread )
{
Result = DestroySoundThread(SoundDeviceInstance->Thread);
SND_ASSERT( MMSUCCESS(Result) ); /* It should succeed! */
if ( ! MMSUCCESS(Result ) )
{
return TranslateInternalMmResult(Result);
}
}
/* Blank this out here */
SoundDeviceInstance->Thread = NULL;
/* Try and close the device */
Result = FunctionTable->Close(SoundDeviceInstance, Handle);
SND_ASSERT( MMSUCCESS(Result) ); /* It should succeed! */
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
/* Drop it from the list */
Result = UnlistSoundDeviceInstance(SoundDeviceInstance);
SND_ASSERT( MMSUCCESS(Result) ); /* It should succeed! */
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
FreeSoundDeviceInstance(SoundDeviceInstance);
return MMSYSERR_NOERROR;
}
MMRESULT
CreateSoundDeviceInstance(
IN PSOUND_DEVICE SoundDevice,
OUT PSOUND_DEVICE_INSTANCE* SoundDeviceInstance)
{
MMRESULT Result;
PMMFUNCTION_TABLE FunctionTable;
SND_TRACE(L"Creating a sound device instance\n");
VALIDATE_MMSYS_PARAMETER( IsValidSoundDevice(SoundDevice) );
VALIDATE_MMSYS_PARAMETER( SoundDeviceInstance != NULL );
Result = AllocateSoundDeviceInstance(SoundDeviceInstance);
if ( ! MMSUCCESS(Result) )
return TranslateInternalMmResult(Result);
/* Get the "open" routine from the function table, and validate it */
Result = GetSoundDeviceFunctionTable(SoundDevice, &FunctionTable);
if ( ! MMSUCCESS(Result) )
{
FreeSoundDeviceInstance(*SoundDeviceInstance);
return TranslateInternalMmResult(Result);
}
if ( FunctionTable->Open == NULL )
{
FreeSoundDeviceInstance(*SoundDeviceInstance);
return MMSYSERR_NOTSUPPORTED;
}
/* Set up the members of the structure */
(*SoundDeviceInstance)->Next = NULL;
(*SoundDeviceInstance)->Device = SoundDevice;
(*SoundDeviceInstance)->Handle = NULL;
(*SoundDeviceInstance)->Thread = NULL;
(*SoundDeviceInstance)->WinMM.Handle = INVALID_HANDLE_VALUE;
(*SoundDeviceInstance)->WinMM.ClientCallback = 0;
(*SoundDeviceInstance)->WinMM.ClientCallbackInstanceData = 0;
(*SoundDeviceInstance)->WinMM.Flags = 0;
/* Initialise the members of the struct used by the sound thread */
(*SoundDeviceInstance)->HeadWaveHeader = NULL;
(*SoundDeviceInstance)->TailWaveHeader = NULL;
(*SoundDeviceInstance)->OutstandingBuffers = 0;
(*SoundDeviceInstance)->LoopsRemaining = 0;
/* Create the streaming thread (TODO - is this for wave only?) */
Result = CreateSoundThread(&(*SoundDeviceInstance)->Thread);
if ( ! MMSUCCESS(Result) )
{
FreeSoundDeviceInstance(*SoundDeviceInstance);
return TranslateInternalMmResult(Result);
}
/* Add the instance to the list */
Result = ListSoundDeviceInstance(SoundDevice, *SoundDeviceInstance);
if ( ! MMSUCCESS(Result) )
{
FreeSoundDeviceInstance(*SoundDeviceInstance);
return TranslateInternalMmResult(Result);
}
/* Try and open the device */
Result = FunctionTable->Open(SoundDevice, (&(*SoundDeviceInstance)->Handle));
if ( ! MMSUCCESS(Result) )
{
UnlistSoundDeviceInstance(*SoundDeviceInstance);
FreeSoundDeviceInstance(*SoundDeviceInstance);
return TranslateInternalMmResult(Result);
}
return MMSYSERR_NOERROR;
}
MMRESULT
WdmAudGetDeviceInterfaceStringByLegacy(
IN MMDEVICE_TYPE DeviceType,
IN DWORD DeviceId,
IN LPWSTR Interface,
IN DWORD InterfaceLength,
OUT DWORD * InterfaceSize)
{
WDMAUD_DEVICE_INFO DeviceInfo;
MMRESULT Result;
ZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
DeviceInfo.DeviceType = DeviceType;
DeviceInfo.DeviceIndex = DeviceId;
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_QUERYDEVICEINTERFACESTRING,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( ! MMSUCCESS(Result) )
{
return TranslateInternalMmResult(Result);
}
if (!Interface)
{
SND_ASSERT(InterfaceSize);
*InterfaceSize = DeviceInfo.u.Interface.DeviceInterfaceStringSize;
return MMSYSERR_NOERROR;
}
if (InterfaceLength < DeviceInfo.u.Interface.DeviceInterfaceStringSize)
{
/* buffer is too small */
return MMSYSERR_MOREDATA;
}
DeviceInfo.u.Interface.DeviceInterfaceStringSize = InterfaceLength;
DeviceInfo.u.Interface.DeviceInterfaceString = Interface;
Result = SyncOverlappedDeviceIoControl(KernelHandle,
IOCTL_QUERYDEVICEINTERFACESTRING,
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
(LPVOID) &DeviceInfo,
sizeof(WDMAUD_DEVICE_INFO),
NULL);
if ( MMSUCCESS(Result) && InterfaceLength > 2)
{
Interface[1] = L'\\';
Interface[InterfaceLength-1] = L'\0';
}
return Result;
}
