windows-xp/Source/XPSP1/NT/multimedia/media/mmdrv/auxdd.c

/****************************************************************************
 *
 *   auxdd.c
 *
 *   Multimedia kernel driver support component (mmdrv)
 *
 *   Copyright (c) 1991-1998 Microsoft Corporation
 *
 *   Driver for wave input and output devices
 *
 *   -- Aux driver entry point(auxMessage)
 *
 *   History
 *      25-Aug-1992 - Robin Speed (RobinSp) wrote it
 *
 ***************************************************************************/

 #include "mmdrv.h"
 #include <ntddaux.h>

/****************************************************************************

    This function conforms to the standard Aux driver message proc
    (auxMessage), which is documented in the DDK.

****************************************************************************/
 DWORD auxMessage(UINT uDevice,
                  UINT uMsg,
                  DWORD_PTR dwUser,
                  DWORD_PTR dwParam1,
                  DWORD_PTR dwParam2)

{
    MMRESULT mRet;
    AUX_DD_VOLUME Volume;

    switch (uMsg) {
    case AUXDM_GETDEVCAPS:
        dprintf2(("AUXDM_GETDEVCAPS"));
        return sndGetData(AuxDevice, uDevice, (DWORD)dwParam2, (LPBYTE)dwParam1,
                          IOCTL_AUX_GET_CAPABILITIES);

    case AUXDM_GETNUMDEVS:
        dprintf2(("AUXDM_GETNUMDEVS"));
        return sndGetNumDevs(AuxDevice);

    case AUXDM_GETVOLUME:
        dprintf2(("AUXDM_GETVOLUME"));

        mRet = sndGetData(AuxDevice, uDevice, sizeof(Volume),
                          (PBYTE)&Volume, IOCTL_AUX_GET_VOLUME);

        if (mRet == MMSYSERR_NOERROR) {
            *(LPDWORD)dwParam1 =
                (DWORD)MAKELONG(HIWORD(Volume.Left),
                                HIWORD(Volume.Right));
        }

        return mRet;

    case AUXDM_SETVOLUME:
        dprintf2(("AUXDM_SETVOLUME"));
        Volume.Left = LOWORD(dwParam1) << 16;
        Volume.Right = HIWORD(dwParam1) << 16;

        return sndSetData(AuxDevice, uDevice, sizeof(Volume),
                          (PBYTE)&Volume, IOCTL_AUX_SET_VOLUME);
    }

    return MMSYSERR_NOTSUPPORTED;
}