186 lines
6.7 KiB
C
186 lines
6.7 KiB
C
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/****************************************************************************
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*
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* piondrvr.c
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*
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* Copyright (c) 1991-1993 Microsoft Corporation. All Rights Reserved.
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*
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* MCI Device Driver for the Pioneer 4200 Videodisc Player
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*
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* Main Module - Standard Driver Interface and Message Procedures
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*
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***************************************************************************/
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#include <windows.h>
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#include <windowsx.h>
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#include <mmsystem.h>
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#include <mmddk.h>
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#include "mcipionr.h"
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#include "pioncnfg.h"
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#define CONFIG_ID 10000L /* use hiword of dwDriverID to */
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/* identify config. opens */
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static WORD wTableEntry; /* custom table ID returned */
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/* from mciLoadCommandResource() */
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/***************************************************************************
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* @doc INTERNAL
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*
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* @api LRESULT | DriverProc | Windows driver entry point. All Windows driver
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* control messages and all MCI messages pass through this entry point.
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*
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* @parm DWORD | dwDriverId | For most messages, <p dwDriverId> is the DWORD
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* value that the driver returns in response to a <m DRV_OPEN> message.
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* Each time that the driver is opened, through the <f DrvOpen> API,
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* the driver receives a <m DRV_OPEN> message and can return an
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* arbitrary, non-zero value. The installable driver interface
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* saves this value and returns a unique driver handle to the
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* application. Whenever the application sends a message to the
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* driver using the driver handle, the interface routes the message
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* to this entry point and passes the corresponding <p dwDriverId>.
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* This mechanism allows the driver to use the same or different
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* identifiers for multiple opens but ensures that driver handles
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* are unique at the application interface layer.
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*
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* The following messages are not related to a particular open
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* instance of the driver. For these messages, the dwDriverId
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* will always be zero.
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*
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* DRV_LOAD, DRV_FREE, DRV_ENABLE, DRV_DISABLE, DRV_OPEN
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*
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* @parm HDRVR | hDriver | This is the handle returned to the
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* application by the driver interface.
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*
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* @parm UINT | message | The requested action to be performed. Message
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* values below <m DRV_RESERVED> are used for globally defined messages.
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* Message values from <m DRV_RESERVED> to <m DRV_USER> are used for
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* defined driver protocols. Messages above <m DRV_USER> are used
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* for driver specific messages.
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*
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* @parm LPARAM | lParam1 | Data for this message. Defined separately for
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* each message
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*
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* @parm LPARAM | lParam2 | Data for this message. Defined separately for
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* each message
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*
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* @rdesc Defined separately for each message.
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***************************************************************************/
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LRESULT FAR PASCAL _LOADDS DriverProc(DWORD dwDriverID, HDRVR hDriver, UINT message, LPARAM lParam1, LPARAM lParam2)
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{
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DWORD dwRes = 0L;
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TCHAR aszResource[32];
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switch (message) {
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case DRV_LOAD:
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/* the DRV_LOAD message is received once, when the driver is */
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/* first loaded - any one-time initialization code goes here */
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/* load the custom command table */
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LoadString(hInstance,IDS_COMMANDS,aszResource,sizeof(aszResource));
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wTableEntry = mciLoadCommandResource(hInstance, aszResource, 0);
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/* return 0L to FAIL the load. */
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dwRes = wTableEntry != MCI_NO_COMMAND_TABLE;
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break;
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case DRV_FREE:
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/* the DRV_FREE message is received once when the driver is */
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/* unloaded - any final shut down code goes here */
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/* free the custom command table */
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mciFreeCommandResource(wTableEntry);
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dwRes = 1L;
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break;
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case DRV_OPEN:
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/* the DRV_OPEN message is received once for each MCI device open */
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/* configuration open case */
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if (!lParam2)
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dwRes = CONFIG_ID;
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/* normal case */
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else {
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LPMCI_OPEN_DRIVER_PARMS lpOpen =
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(LPMCI_OPEN_DRIVER_PARMS)lParam2;
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UINT Port;
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UINT Rate;
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/* associate the channel number with the driver ID */
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pionGetComportAndRate((LPTSTR)lpOpen->lpstrParams, &Port, &Rate);
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pionSetBaudRate(Port, Rate);
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mciSetDriverData(lpOpen->wDeviceID, (DWORD)Port);
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/* specify the custom command table and the device type */
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lpOpen->wCustomCommandTable = wTableEntry;
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lpOpen->wType = MCI_DEVTYPE_VIDEODISC;
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/* return the device ID to be used in subsequent */
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/* messages or 0 to fail the open */
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dwRes = lpOpen->wDeviceID;
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break;
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}
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case DRV_CLOSE:
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/* this message is received once for each MCI device close */
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dwRes = 1L;
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break;
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case DRV_ENABLE:
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/* the DRV_ENABLE message is received when the driver is loaded */
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/* or reloaded and whenever windows is enabled */
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dwRes = 1L;
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break;
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case DRV_DISABLE:
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/* the DRV_DISABLE message is received before the driver is */
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/* freed and whenever windows is disabled */
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dwRes = 1L;
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break;
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case DRV_QUERYCONFIGURE:
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/* the DRV_QUERYCONFIGURE message is used to determine if the */
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/* DRV_CONCIGURE message is supported - return 1 to indicate */
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/* configuration IS supported. */
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dwRes = 1L;
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break;
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case DRV_CONFIGURE:
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/* the DRV_CONFIGURE message instructs the device to perform */
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/* device configuration. */
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if (lParam2 && lParam1 && (((LPDRVCONFIGINFO)lParam2)->dwDCISize == sizeof(DRVCONFIGINFO)))
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dwRes = pionConfig((HWND)lParam1, (LPDRVCONFIGINFO)lParam2);
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else
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dwRes = DRVCNF_CANCEL;
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break;
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default:
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/* all other messages are processed here */
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/* select messages in the MCI range */
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if (!HIWORD(dwDriverID) &&
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message >= DRV_MCI_FIRST && message <= DRV_MCI_LAST ||
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message >= VDISC_FIRST && message <= VDISC_LAST)
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dwRes = mciDriverEntry((WORD)dwDriverID, message,
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lParam1, lParam2);
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/* other messages get default processing */
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else
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dwRes = DefDriverProc(dwDriverID, hDriver, message,
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lParam1, lParam2);
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break;
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}
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return (LRESULT)dwRes;
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}
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