423 lines
14 KiB
C
423 lines
14 KiB
C
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/****************************************************************************
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auxout.c
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Level 1 kitchen sink DLL aux support module
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Copyright (c) 1990-2001 Microsoft Corporation
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Changes for NT :
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Change parameters for MapAuxId to return the driver index rather
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than a pointer
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change list of include files
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widen function parameters and return codes
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Change WINAPI to APIENTRY
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History
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10/1/92 Updated for NT by Robin Speed (RobinSp)
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****************************************************************************/
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#include "winmmi.h"
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/****************************************************************************
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* @doc INTERNAL AUX
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*
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* @func MMRESULT | auxReferenceDriverById | This function maps a logical id
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* to a device driver and physical id.
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*
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* @parm IN UINT | id | The logical id to be mapped.
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*
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* @parm OUT PAUXRV* OPTIONAL | ppauxdrv | Pointer to AUXDRV structure
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* describing the driver supporting the id.
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*
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* @parm OUT UINT* OPTIONAL | pport | The driver-relative device number. If
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* the caller supplies this buffer then it must also supply ppauxdrv.
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*
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* @rdesc The return value is zero if successful, MMSYSERR_BADDEVICEID if
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* the id is out of range.
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*
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* @comm If the caller specifies ppwavedrv then this function increments
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* the zuxdrv's usage before returning. The caller must ensure
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* the usage is eventually decremented.
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*
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****************************************************************************/
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MMRESULT auxReferenceDriverById(IN UINT id, OUT PAUXDRV *ppauxdrv OPTIONAL, OUT UINT *pport OPTIONAL)
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{
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PAUXDRV pdrv;
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MMRESULT mmr;
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// Should not be called asking for port but not auxdrv
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WinAssert(!(pport && !ppauxdrv));
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EnterNumDevs("auxReferenceDriverById");
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if (AUX_MAPPER == id)
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{
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id = 0;
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for (pdrv = auxdrvZ.Next; pdrv != &auxdrvZ; pdrv = pdrv->Next)
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{
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if (pdrv->fdwDriver & MMDRV_MAPPER) break;
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}
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} else {
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for (pdrv = auxdrvZ.Next; pdrv != &auxdrvZ; pdrv = pdrv->Next)
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{
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if (pdrv->fdwDriver & MMDRV_MAPPER) continue;
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if (pdrv->NumDevs > id) break;
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id -= pdrv->NumDevs;
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}
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}
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if (pdrv != &auxdrvZ)
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{
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if (ppauxdrv)
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{
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mregIncUsagePtr(pdrv);
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*ppauxdrv = pdrv;
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if (pport) *pport = id;
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}
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mmr = MMSYSERR_NOERROR;
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} else {
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mmr = MMSYSERR_BADDEVICEID;
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}
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LeaveNumDevs("auxReferenceDriverById");
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return mmr;
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}
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PCWSTR auxReferenceDevInterfaceById(UINT id)
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{
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PAUXDRV pdrv;
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if (!auxReferenceDriverById(id, &pdrv, NULL))
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{
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PCWSTR DevInterface;
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DevInterface = pdrv->cookie;
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if (DevInterface) wdmDevInterfaceInc(DevInterface);
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mregDecUsagePtr(pdrv);
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return DevInterface;
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}
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return NULL;
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}
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/*****************************************************************************
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* @doc EXTERNAL AUX
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*
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* @func MMRESULT | auxOutMessage | This function sends a messages to an auxiliary
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* output device. It also performs error checking on the device ID passed.
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*
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* @parm UINT | uDeviceID | Identifies the auxiliary output device to be
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* queried. Specify a valid device ID (see the following comments
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* section), or use the following constant:
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* @flag AUX_MAPPER | Auxiliary audio mapper. The function will
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* return an error if no auxiliary audio mapper is installed.
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*
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* @parm UINT | uMessage | The message to send.
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*
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* @parm DWORD | dw1Param1 | Parameter 1.
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*
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* @parm DWORD | dw2Param2 | Parameter 2.
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*
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* @rdesc Returns the value returned from the driver.
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*
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****************************************************************************/
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MMRESULT APIENTRY auxOutMessage(
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UINT uDeviceID,
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UINT uMessage,
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DWORD_PTR dwParam1,
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DWORD_PTR dwParam2)
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{
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PAUXDRV auxdrvr;
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UINT port;
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DWORD mmr;
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ClientUpdatePnpInfo();
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mmr = auxReferenceDriverById(uDeviceID, &auxdrvr, &port);
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if (mmr) return mmr;
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if (!auxdrvr->drvMessage)
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{
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mmr = MMSYSERR_NODRIVER;
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}
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else if (!mregHandleInternalMessages (auxdrvr, TYPE_AUX, port, uMessage, dwParam1, dwParam2, &mmr))
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{
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mmr = (MMRESULT)auxdrvr->drvMessage(port, uMessage, 0L, dwParam1, dwParam2);
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}
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mregDecUsagePtr(auxdrvr);
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return mmr;
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}
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/*****************************************************************************
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* @doc EXTERNAL AUX
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*
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* @api UINT | auxGetNumDevs | This function retrieves the number of auxiliary
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* output devices present in the system.
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*
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* @rdesc Returns the number of auxiliary output devices present in the system.
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*
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* @xref auxGetDevCaps
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****************************************************************************/
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UINT APIENTRY auxGetNumDevs(void)
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{
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UINT cDevs;
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ClientUpdatePnpInfo();
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EnterNumDevs("auxGetNumDevs");
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cDevs = (UINT)wTotalAuxDevs;
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LeaveNumDevs("auxGetNumDevs");
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return cDevs;
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}
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/*****************************************************************************
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* @doc EXTERNAL AUX
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*
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* @api MMRESULT | auxGetDevCaps | This function queries a specified
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* auxiliary output device to determine its capabilities.
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*
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* @parm UINT | uDeviceID | Identifies the auxiliary output device to be
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* queried. Specify a valid device ID (see the following comments
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* section), or use the following constant:
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* @flag AUX_MAPPER | Auxiliary audio mapper. The function will
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* return an error if no auxiliary audio mapper is installed.
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*
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* @parm LPAUXCAPS | lpCaps | Specifies a far pointer to an AUXCAPS
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* structure. This structure is filled with information about the
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* capabilities of the device.
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*
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* @parm UINT | wSize | Specifies the size of the AUXCAPS structure.
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*
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* @rdesc Returns zero if the function was successful. Otherwise, it returns
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* an error number. Possible error returns are:
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* @flag MMSYSERR_BADDEVICEID | Specified device ID is out of range.
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* @flag MMSYSERR_NODRIVER | The driver failed to install.
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*
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* @comm The device ID specified by <p uDeviceID> varies from zero
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* to one less than the number of devices present. AUX_MAPPER may
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* also be used. Use <f auxGetNumDevs> to determine the number of
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* auxiliary devices present in the system.
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*
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* @xref auxGetNumDevs
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****************************************************************************/
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//
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// ISSUE-2001/01/08-FrankYe Silly casts to UINT in these functions,
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// should validate first
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//
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MMRESULT APIENTRY auxGetDevCapsW(UINT_PTR uDeviceID, LPAUXCAPSW lpCaps, UINT wSize)
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{
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DWORD_PTR dwParam1, dwParam2;
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MDEVICECAPSEX mdCaps;
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PCWSTR DevInterface;
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MMRESULT mmr;
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if (!wSize)
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return MMSYSERR_NOERROR;
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V_WPOINTER(lpCaps, wSize, MMSYSERR_INVALPARAM);
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ClientUpdatePnpInfo();
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DevInterface = auxReferenceDevInterfaceById((UINT)uDeviceID);
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dwParam2 = (DWORD_PTR)DevInterface;
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if (0 == dwParam2)
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{
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dwParam1 = (DWORD_PTR)lpCaps;
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dwParam2 = (DWORD)wSize;
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}
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else
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{
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mdCaps.cbSize = (DWORD)wSize;
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mdCaps.pCaps = lpCaps;
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dwParam1 = (DWORD_PTR)&mdCaps;
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}
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mmr = (MMRESULT)auxOutMessage((UINT)uDeviceID, AUXDM_GETDEVCAPS, dwParam1, dwParam2);
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if (DevInterface) wdmDevInterfaceDec(DevInterface);
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return mmr;
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}
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MMRESULT APIENTRY auxGetDevCapsA(UINT_PTR uDeviceID, LPAUXCAPSA lpCaps, UINT wSize)
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{
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AUXCAPS2W wDevCaps2;
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AUXCAPS2A aDevCaps2;
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DWORD_PTR dwParam1, dwParam2;
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MDEVICECAPSEX mdCaps;
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PCWSTR DevInterface;
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MMRESULT mmRes;
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if (!wSize)
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return MMSYSERR_NOERROR;
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V_WPOINTER(lpCaps, wSize, MMSYSERR_INVALPARAM);
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ClientUpdatePnpInfo();
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DevInterface = auxReferenceDevInterfaceById((UINT)uDeviceID);
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dwParam2 = (DWORD_PTR)DevInterface;
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memset(&wDevCaps2, 0, sizeof(wDevCaps2));
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if (0 == dwParam2)
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{
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dwParam1 = (DWORD_PTR)&wDevCaps2;
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dwParam2 = (DWORD)sizeof(wDevCaps2);
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}
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else
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{
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mdCaps.cbSize = (DWORD)sizeof(wDevCaps2);
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mdCaps.pCaps = &wDevCaps2;
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dwParam1 = (DWORD_PTR)&mdCaps;
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}
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mmRes = (MMRESULT)auxOutMessage( (UINT)uDeviceID, AUXDM_GETDEVCAPS,
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dwParam1,
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dwParam2);
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if (DevInterface) wdmDevInterfaceDec(DevInterface);
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//
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// Don't copy data back if bad return code
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//
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if (mmRes != MMSYSERR_NOERROR) {
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return mmRes;
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}
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aDevCaps2.wMid = wDevCaps2.wMid;
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aDevCaps2.wPid = wDevCaps2.wPid;
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aDevCaps2.vDriverVersion = wDevCaps2.vDriverVersion;
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aDevCaps2.wTechnology = wDevCaps2.wTechnology;
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aDevCaps2.dwSupport = wDevCaps2.dwSupport;
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aDevCaps2.ManufacturerGuid = wDevCaps2.ManufacturerGuid;
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aDevCaps2.ProductGuid = wDevCaps2.ProductGuid;
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aDevCaps2.NameGuid = wDevCaps2.NameGuid;
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// copy and convert lpwText to lpText here.
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Iwcstombs( aDevCaps2.szPname, wDevCaps2.szPname, MAXPNAMELEN);
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CopyMemory((PVOID)lpCaps, (PVOID)&aDevCaps2, min(sizeof(aDevCaps2), wSize));
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return mmRes;
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}
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/*****************************************************************************
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* @doc EXTERNAL AUX
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*
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* @api MMRESULT | auxGetVolume | This function returns the current volume
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* setting of an auxiliary output device.
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*
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* @parm UINT | uDeviceID | Identifies the auxiliary output device to be
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* queried.
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*
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* @parm LPDWORD | lpdwVolume | Specifies a far pointer to a location
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* to be filled with the current volume setting. The low-order word of
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* this location contains the left channel volume setting, and the high-order
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* word contains the right channel setting. A value of 0xFFFF represents
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* full volume, and a value of 0x0000 is silence.
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*
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* If a device does not support both left and right volume
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* control, the low-order word of the specified location contains
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* the volume level.
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*
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* The full 16-bit setting(s)
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* set with <f auxSetVolume> are returned, regardless of whether
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* the device supports the full 16 bits of volume level control.
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*
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* @comm Not all devices support volume control.
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* To determine whether the device supports volume control, use the
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* AUXCAPS_VOLUME flag to test the <e AUXCAPS.dwSupport> field of the
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* <t AUXCAPS> structure (filled by <f auxGetDevCaps>).
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*
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* To determine whether the device supports volume control on both the
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* left and right channels, use the AUXCAPS_LRVOLUME flag to test the
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* <e AUXCAPS.dwSupport> field of the <t AUXCAPS> structure (filled
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* by <f auxGetDevCaps>).
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*
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* @rdesc Returns zero if the function was successful. Otherwise, it returns
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* an error number. Possible error returns are:
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* @flag MMSYSERR_BADDEVICEID | Specified device ID is out of range.
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* @flag MMSYSERR_NODRIVER | The driver failed to install.
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*
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* @xref auxSetVolume
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****************************************************************************/
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MMRESULT APIENTRY auxGetVolume(UINT uDeviceID, LPDWORD lpdwVolume)
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{
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PCWSTR DevInterface;
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MMRESULT mmr;
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V_WPOINTER(lpdwVolume, sizeof(DWORD), MMSYSERR_INVALPARAM);
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ClientUpdatePnpInfo();
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DevInterface = auxReferenceDevInterfaceById(uDeviceID);
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mmr = (MMRESULT)auxOutMessage(uDeviceID, AUXDM_GETVOLUME, (DWORD_PTR)lpdwVolume, (DWORD_PTR)DevInterface);
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if (DevInterface) wdmDevInterfaceDec(DevInterface);
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return mmr;
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}
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/*****************************************************************************
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* @doc EXTERNAL AUX
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*
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* @api MMRESULT | auxSetVolume | This function sets the volume in an
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* auxiliary output device.
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*
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* @parm UINT | uDeviceID | Identifies the auxiliary output device to be
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* queried. Device IDs are determined implicitly from the number of
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* devices present in the system. Device ID values range from zero
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* to one less than the number of devices present. Use <f auxGetNumDevs>
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* to determine the number of auxiliary devices in the system.
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*
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* @parm DWORD | dwVolume | Specifies the new volume setting. The
|
||
|
|
* low-order UINT specifies the left channel volume setting, and the
|
||
|
|
* high-order word specifies the right channel setting.
|
||
|
|
* A value of 0xFFFF represents full volume, and a value of 0x0000
|
||
|
|
* is silence.
|
||
|
|
*
|
||
|
|
* If a device does not support both left and right volume
|
||
|
|
* control, the low-order word of <p dwVolume> specifies the volume
|
||
|
|
* level, and the high-order word is ignored.
|
||
|
|
*
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||
|
|
* @rdesc Returns zero if the function was successful. Otherwise, it returns
|
||
|
|
* an error number. Possible error returns are:
|
||
|
|
* @flag MMSYSERR_BADDEVICEID | Specified device ID is out of range.
|
||
|
|
* @flag MMSYSERR_NODRIVER | The driver failed to install.
|
||
|
|
*
|
||
|
|
* @comm Not all devices support volume control.
|
||
|
|
* To determine whether the device supports volume control, use the
|
||
|
|
* AUXCAPS_VOLUME flag to test the <e AUXCAPS.dwSupport> field of the
|
||
|
|
* <t AUXCAPS> structure (filled by <f auxGetDevCaps>).
|
||
|
|
*
|
||
|
|
* To determine whether the device supports volume control on both the
|
||
|
|
* left and right channels, use the AUXCAPS_LRVOLUME flag to test the
|
||
|
|
* <e AUXCAPS.dwSupport> field of the <t AUXCAPS> structure (filled
|
||
|
|
* by <f auxGetDevCaps>).
|
||
|
|
*
|
||
|
|
* Most devices do not support the full 16 bits of volume level control
|
||
|
|
* and will use only the high-order bits of the requested volume setting.
|
||
|
|
* For example, for a device that supports 4 bits of volume control,
|
||
|
|
* requested volume level values of 0x4000, 0x4fff, and 0x43be will
|
||
|
|
* all produce the same physical volume setting, 0x4000. The
|
||
|
|
* <f auxGetVolume> function will return the full 16-bit setting set
|
||
|
|
* with <f auxSetVolume>.
|
||
|
|
*
|
||
|
|
* Volume settings are interpreted logarithmically. This means the
|
||
|
|
* perceived volume increase is the same when increasing the
|
||
|
|
* volume level from 0x5000 to 0x6000 as it is from 0x4000 to 0x5000.
|
||
|
|
*
|
||
|
|
* @xref auxGetVolume
|
||
|
|
****************************************************************************/
|
||
|
|
MMRESULT APIENTRY auxSetVolume(UINT uDeviceID, DWORD dwVolume)
|
||
|
|
{
|
||
|
|
PCWSTR DevInterface;
|
||
|
|
MMRESULT mmr;
|
||
|
|
|
||
|
|
ClientUpdatePnpInfo();
|
||
|
|
|
||
|
|
DevInterface = auxReferenceDevInterfaceById(uDeviceID);
|
||
|
|
mmr = (MMRESULT)auxOutMessage(uDeviceID, AUXDM_SETVOLUME, dwVolume, (DWORD_PTR)DevInterface);
|
||
|
|
if (DevInterface) wdmDevInterfaceDec(DevInterface);
|
||
|
|
return mmr;
|
||
|
|
}
|