/****************************************************************************
*
* piondrvr.c
*
* Copyright (c) 1991-1992 Microsoft Corporation. All Rights Reserved.
*
* MCI Device Driver for the Pioneer 4200 Videodisc Player
*
* Main Module - Standard Driver Interface and Message Procedures
*
***************************************************************************/
#include <windows.h>
#include <mmsystem.h>
#include <mmddk.h>
#include "mcipionr.h"
#include "pioncnfg.h"
#define CONFIG_ID 10000L /* use hiword of dwDriverID to */
/* identify config. opens */
static WORD wTableEntry; /* custom table ID returned */
/* from mciLoadCommandResource() */
/***************************************************************************
* @doc INTERNAL
*
* @api LRESULT | DriverProc | Windows driver entry point. All Windows driver
* control messages and all MCI messages pass through this entry point.
*
* @parm DWORD | dwDriverId | For most messages, <p dwDriverId> is the DWORD
* value that the driver returns in response to a <m DRV_OPEN> message.
* Each time that the driver is opened, through the <f DrvOpen> API,
* the driver receives a <m DRV_OPEN> message and can return an
* arbitrary, non-zero value. The installable driver interface
* saves this value and returns a unique driver handle to the
* application. Whenever the application sends a message to the
* driver using the driver handle, the interface routes the message
* to this entry point and passes the corresponding <p dwDriverId>.
* This mechanism allows the driver to use the same or different
* identifiers for multiple opens but ensures that driver handles
* are unique at the application interface layer.
*
* The following messages are not related to a particular open
* instance of the driver. For these messages, the dwDriverId
* will always be zero.
*
* DRV_LOAD, DRV_FREE, DRV_ENABLE, DRV_DISABLE, DRV_OPEN
*
* @parm HDRVR | hDriver | This is the handle returned to the
* application by the driver interface.
*
* @parm UINT | message | The requested action to be performed. Message
* values below <m DRV_RESERVED> are used for globally defined messages.
* Message values from <m DRV_RESERVED> to <m DRV_USER> are used for
* defined driver protocols. Messages above <m DRV_USER> are used
* for driver specific messages.
*
* @parm LPARAM | lParam1 | Data for this message. Defined separately for
* each message
*
* @parm LPARAM | lParam2 | Data for this message. Defined separately for
* each message
*
* @rdesc Defined separately for each message.
***************************************************************************/
LRESULT FAR PASCAL _loadds DriverProc(DWORD dwDriverID, HDRVR hDriver, UINT message, LPARAM lParam1, LPARAM lParam2)
{
DWORD dwRes = 0L;
char aszResource[32];
switch (message) {
case DRV_LOAD:
/* the DRV_LOAD message is received once, when the driver is */
/* first loaded - any one-time initialization code goes here */
/* load the custom command table */
LoadString(hInstance,IDS_COMMANDS,aszResource,sizeof(aszResource));
wTableEntry = mciLoadCommandResource(hInstance, aszResource, 0);
/* return 0L to FAIL the load. */
dwRes = wTableEntry != MCI_NO_COMMAND_TABLE;
break;
case DRV_FREE:
/* the DRV_FREE message is received once when the driver is */
/* unloaded - any final shut down code goes here */
/* free the custom command table */
mciFreeCommandResource(wTableEntry);
dwRes = 1L;
break;
case DRV_OPEN:
/* the DRV_OPEN message is received once for each MCI device open */
/* configuration open case */
if (!lParam2)
dwRes = CONFIG_ID;
/* normal case */
else {
LPMCI_OPEN_DRIVER_PARMS lpOpen =
(LPMCI_OPEN_DRIVER_PARMS)lParam2;
/* associate the channel number with the driver ID */
mciSetDriverData(lpOpen->wDeviceID,
(DWORD)pionGetComport((LPSTR)lpOpen->lpstrParams));
/* specify the custom command table and the device type */
lpOpen->wCustomCommandTable = wTableEntry;
lpOpen->wType = MCI_DEVTYPE_VIDEODISC;
/* return the device ID to be used in subsequent */
/* messages or 0 to fail the open */
dwRes = lpOpen->wDeviceID;
break;
}
case DRV_CLOSE:
/* this message is received once for each MCI device close */
dwRes = 1L;
break;
case DRV_ENABLE:
/* the DRV_ENABLE message is received when the driver is loaded */
/* or reloaded and whenever windows is enabled */
dwRes = 1L;
break;
case DRV_DISABLE:
/* the DRV_DISABLE message is received before the driver is */
/* freed and whenever windows is disabled */
dwRes = 1L;
break;
case DRV_QUERYCONFIGURE:
/* the DRV_QUERYCONFIGURE message is used to determine if the */
/* DRV_CONCIGURE message is supported - return 1 to indicate */
/* configuration IS supported. */
dwRes = 1L;
break;
case DRV_CONFIGURE:
/* the DRV_CONFIGURE message instructs the device to perform */
/* device configuration. */
if (lParam2 && lParam1 && (((LPDRVCONFIGINFO)lParam2)->dwDCISize == sizeof(DRVCONFIGINFO)))
dwRes = pionConfig((HWND)LOWORD(lParam1), (LPDRVCONFIGINFO)lParam2);
else
dwRes = DRVCNF_CANCEL;
break;
default:
/* all other messages are processed here */
/* select messages in the MCI range */
if (!HIWORD(dwDriverID) &&
message >= DRV_MCI_FIRST && message <= DRV_MCI_LAST ||
message >= VDISC_FIRST && message <= VDISC_LAST)
dwRes = mciDriverEntry((WORD)dwDriverID, message,
lParam1, lParam2);
/* other messages get default processing */
else
dwRes = DefDriverProc(dwDriverID, hDriver, message,
lParam1, lParam2);
break;
}
return (LRESULT)dwRes;
}
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