C++ (Cpp) MMixerOpen Examples

Example #1

File: mmixer.c Project: Moteesh/reactos

MMRESULT
WdmAudSetMixerDeviceFormatByMMixer(
    IN  PSOUND_DEVICE_INSTANCE Instance,
    IN  DWORD DeviceId,
    IN  PWAVEFORMATEX WaveFormat,
    IN  DWORD WaveFormatSize)
{
    if (MMixerOpen(&MixerContext, DeviceId, (PVOID)Instance, MixerEventCallback, &Instance->Handle) == MM_STATUS_SUCCESS)
        return MMSYSERR_NOERROR;

    return MMSYSERR_BADDEVICEID;
}

Example #2

File: mmixer.c Project: hoangduit/reactos

NTSTATUS
WdmAudControlOpenMixer(
    IN  PDEVICE_OBJECT DeviceObject,
    IN  PIRP Irp,
    IN  PWDMAUD_DEVICE_INFO DeviceInfo,
    IN  PWDMAUD_CLIENT ClientInfo)
{
    HANDLE hMixer;
    PWDMAUD_HANDLE Handles;
    //PWDMAUD_DEVICE_EXTENSION DeviceExtension;
    NTSTATUS Status;
    PKEVENT EventObject = NULL;

    DPRINT("WdmAudControlOpenMixer\n");

    //DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;

    if (DeviceInfo->u.hNotifyEvent)
    {
        Status = ObReferenceObjectByHandle(DeviceInfo->u.hNotifyEvent, EVENT_MODIFY_STATE, *ExEventObjectType, UserMode, (LPVOID*)&EventObject, NULL);

        if (!NT_SUCCESS(Status))
        {
            DPRINT1("Invalid notify event passed %p from client %p\n", DeviceInfo->u.hNotifyEvent, ClientInfo);
            DbgBreakPoint();
            return SetIrpIoStatus(Irp, STATUS_UNSUCCESSFUL, 0);
        }
    }

    if (MMixerOpen(&MixerContext, DeviceInfo->DeviceIndex, ClientInfo, EventCallback, &hMixer) != MM_STATUS_SUCCESS)
    {
        ObDereferenceObject(EventObject);
        DPRINT1("Failed to open mixer\n");
        return SetIrpIoStatus(Irp, STATUS_UNSUCCESSFUL, 0);
    }


    Handles = AllocateItem(NonPagedPool, sizeof(WDMAUD_HANDLE) * (ClientInfo->NumPins+1));

    if (Handles)
    {
        if (ClientInfo->NumPins)
        {
            RtlMoveMemory(Handles, ClientInfo->hPins, sizeof(WDMAUD_HANDLE) * ClientInfo->NumPins);
            FreeItem(ClientInfo->hPins);
        }

        ClientInfo->hPins = Handles;
        ClientInfo->hPins[ClientInfo->NumPins].Handle = hMixer;
        ClientInfo->hPins[ClientInfo->NumPins].Type = MIXER_DEVICE_TYPE;
        ClientInfo->hPins[ClientInfo->NumPins].NotifyEvent = EventObject;
        ClientInfo->NumPins++;
    }
    else
    {
        ObDereferenceObject(EventObject);
        return SetIrpIoStatus(Irp, STATUS_UNSUCCESSFUL, sizeof(WDMAUD_DEVICE_INFO));
    }

    DeviceInfo->hDevice = hMixer;

    return SetIrpIoStatus(Irp, STATUS_SUCCESS, sizeof(WDMAUD_DEVICE_INFO));
}