72 lines
2 KiB
C
72 lines
2 KiB
C
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/****************************************************************************
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*
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* auxdd.c
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*
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* Multimedia kernel driver support component (mmdrv)
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*
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* Copyright (c) 1991-1998 Microsoft Corporation
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*
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* Driver for wave input and output devices
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*
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* -- Aux driver entry point(auxMessage)
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*
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* History
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* 25-Aug-1992 - Robin Speed (RobinSp) wrote it
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*
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***************************************************************************/
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#include "mmdrv.h"
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#include <ntddaux.h>
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/****************************************************************************
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This function conforms to the standard Aux driver message proc
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(auxMessage), which is documented in the DDK.
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****************************************************************************/
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DWORD auxMessage(UINT uDevice,
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UINT uMsg,
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DWORD_PTR dwUser,
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DWORD_PTR dwParam1,
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DWORD_PTR dwParam2)
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{
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MMRESULT mRet;
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AUX_DD_VOLUME Volume;
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switch (uMsg) {
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case AUXDM_GETDEVCAPS:
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dprintf2(("AUXDM_GETDEVCAPS"));
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return sndGetData(AuxDevice, uDevice, (DWORD)dwParam2, (LPBYTE)dwParam1,
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IOCTL_AUX_GET_CAPABILITIES);
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case AUXDM_GETNUMDEVS:
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dprintf2(("AUXDM_GETNUMDEVS"));
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return sndGetNumDevs(AuxDevice);
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case AUXDM_GETVOLUME:
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dprintf2(("AUXDM_GETVOLUME"));
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mRet = sndGetData(AuxDevice, uDevice, sizeof(Volume),
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(PBYTE)&Volume, IOCTL_AUX_GET_VOLUME);
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if (mRet == MMSYSERR_NOERROR) {
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*(LPDWORD)dwParam1 =
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(DWORD)MAKELONG(HIWORD(Volume.Left),
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HIWORD(Volume.Right));
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}
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return mRet;
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case AUXDM_SETVOLUME:
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dprintf2(("AUXDM_SETVOLUME"));
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Volume.Left = LOWORD(dwParam1) << 16;
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Volume.Right = HIWORD(dwParam1) << 16;
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return sndSetData(AuxDevice, uDevice, sizeof(Volume),
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(PBYTE)&Volume, IOCTL_AUX_SET_VOLUME);
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}
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return MMSYSERR_NOTSUPPORTED;
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}
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