MIXER_STATUS
MMixerGetMidiDevicePath(
IN PMIXER_CONTEXT MixerContext,
IN ULONG bMidiIn,
IN ULONG DeviceId,
OUT LPWSTR * DevicePath)
{
PMIXER_LIST MixerList;
LPMIXER_DATA MixerData;
LPMIDI_INFO MidiInfo;
ULONG Length;
MIXER_STATUS Status;
/* verify mixer context */
Status = MMixerVerifyContext(MixerContext);
if (Status != MM_STATUS_SUCCESS)
{
/* invalid context passed */
return Status;
}
/* grab mixer list */
MixerList = (PMIXER_LIST)MixerContext->MixerContext;
/* find destination midi */
Status = MMixerGetMidiInfoByIndexAndType(MixerList, DeviceId, bMidiIn, &MidiInfo);
if (Status != MM_STATUS_SUCCESS)
{
/* failed to find midi info */
return MM_STATUS_INVALID_PARAMETER;
}
/* get associated device id */
MixerData = MMixerGetDataByDeviceId(MixerList, MidiInfo->DeviceId);
if (!MixerData)
return MM_STATUS_INVALID_PARAMETER;
/* calculate length */
Length = wcslen(MixerData->DeviceName)+1;
/* allocate destination buffer */
*DevicePath = MixerContext->Alloc(Length * sizeof(WCHAR));
if (!*DevicePath)
{
/* no memory */
return MM_STATUS_NO_MEMORY;
}
/* copy device path */
MixerContext->Copy(*DevicePath, MixerData->DeviceName, Length * sizeof(WCHAR));
/* done */
return MM_STATUS_SUCCESS;
}
MIXER_STATUS
MMixerOpenMidiPin(
IN PMIXER_CONTEXT MixerContext,
IN PMIXER_LIST MixerList,
IN ULONG DeviceId,
IN ULONG PinId,
IN ACCESS_MASK DesiredAccess,
IN PIN_CREATE_CALLBACK CreateCallback,
IN PVOID Context,
OUT PHANDLE PinHandle)
{
PKSPIN_CONNECT PinConnect;
PKSDATAFORMAT DataFormat;
LPMIXER_DATA MixerData;
NTSTATUS Status;
MIXER_STATUS MixerStatus;
MixerData = MMixerGetDataByDeviceId(MixerList, DeviceId);
if (!MixerData)
return MM_STATUS_INVALID_PARAMETER;
/* allocate pin connect */
PinConnect = MMixerAllocatePinConnect(MixerContext, sizeof(KSDATAFORMAT));
if (!PinConnect)
{
/* no memory */
return MM_STATUS_NO_MEMORY;
}
/* initialize pin connect struct */
MMixerInitializePinConnect(PinConnect, PinId);
/* get offset to dataformat */
DataFormat = (PKSDATAFORMAT) (PinConnect + 1);
/* initialize data format */
RtlMoveMemory(&DataFormat->MajorFormat, &KSDATAFORMAT_TYPE_MUSIC, sizeof(GUID));
RtlMoveMemory(&DataFormat->SubFormat, &KSDATAFORMAT_SUBTYPE_MIDI, sizeof(GUID));
RtlMoveMemory(&DataFormat->Specifier, &KSDATAFORMAT_SPECIFIER_NONE, sizeof(GUID));
if (CreateCallback)
{
/* let the callback handle the creation */
MixerStatus = CreateCallback(Context, DeviceId, PinId, MixerData->hDevice, PinConnect, DesiredAccess, PinHandle);
}
else
{
/* now create the pin */
Status = KsCreatePin(MixerData->hDevice, PinConnect, DesiredAccess, PinHandle);
/* normalize status */
if (Status == STATUS_SUCCESS)
MixerStatus = MM_STATUS_SUCCESS;
else
MixerStatus = MM_STATUS_UNSUCCESSFUL;
}
/* free create info */
MixerContext->Free(PinConnect);
/* done */
return MixerStatus;
}
MIXER_STATUS
MMixerOpenWavePin(
IN PMIXER_CONTEXT MixerContext,
IN PMIXER_LIST MixerList,
IN ULONG DeviceId,
IN ULONG PinId,
IN LPWAVEFORMATEX WaveFormatEx,
IN ACCESS_MASK DesiredAccess,
IN PIN_CREATE_CALLBACK CreateCallback,
IN PVOID Context,
OUT PHANDLE PinHandle)
{
PKSPIN_CONNECT PinConnect;
PKSDATAFORMAT_WAVEFORMATEX DataFormat;
LPMIXER_DATA MixerData;
NTSTATUS Status;
MIXER_STATUS MixerStatus;
MixerData = MMixerGetDataByDeviceId(MixerList, DeviceId);
if (!MixerData)
return MM_STATUS_INVALID_PARAMETER;
/* allocate pin connect */
PinConnect = MMixerAllocatePinConnect(MixerContext, sizeof(KSDATAFORMAT_WAVEFORMATEX));
if (!PinConnect)
{
/* no memory */
return MM_STATUS_NO_MEMORY;
}
/* initialize pin connect struct */
MMixerInitializePinConnect(PinConnect, PinId);
/* get offset to dataformat */
DataFormat = (PKSDATAFORMAT_WAVEFORMATEX) (PinConnect + 1);
/* initialize with requested wave format */
MMixerInitializeDataFormat(DataFormat, WaveFormatEx);
if (CreateCallback)
{
/* let the callback handle the creation */
MixerStatus = CreateCallback(Context, DeviceId, PinId, MixerData->hDevice, PinConnect, DesiredAccess, PinHandle);
}
else
{
/* now create the pin */
Status = KsCreatePin(MixerData->hDevice, PinConnect, DesiredAccess, PinHandle);
/* normalize status */
if (Status == STATUS_SUCCESS)
MixerStatus = MM_STATUS_SUCCESS;
else
MixerStatus = MM_STATUS_UNSUCCESSFUL;
}
/* free create info */
MixerContext->Free(PinConnect);
/* done */
return MixerStatus;
}
