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157 lines
4.0 KiB
C
157 lines
4.0 KiB
C
/*
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File: VDigUtils.c
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Contains: Utilities for the Video Digitizer Component.
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Written by: Fernando Urbina
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Copyright: © 1993 by Apple Computer, Inc. All rights reserved.
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Change History (most recent first):
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<1> 6/3/93 kc first checked in
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<LW7> 4/14/93 fau Got rid of obsolete routines and made Enable/DisableVideo in to
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do essentially nothing.
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<LW6> 4/5/93 fau Changed the csCode to use the ones defined in DepVideo.h.
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<LW5> 4/4/93 fau When checking the GetVidIn csMode, made sure to look at only bit
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0 by anding with 0x01.
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<LW4> 2/22/93 fau Changed the GetMaxVidMode routine to use the new
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GetCompOutCapabilities call to the driver that will return the
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maximum mode with video in. This fixes a bug when dynamically
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switching video-in when the graphics bpp is too high.
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<LW3> 2/17/93 fau Backed out the previous change because the driver reverted to
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its original mode.
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<LW2> 2/16/93 fau Updated the call to cscGetVideoIn to reflect the new interface
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in the driver. (The enabled bit is bit 1, not bit 0).
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<1> 1/4/93 fau first checked in
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*/
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#include <Palettes.h>
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#include <Video.h>
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#include <RomDefs.h>
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#include <Slots.h>
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#include <Video.h>
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#include <DepVideo.h>
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#include <ToolUtils.h>
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#include <Devices.h>
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#include "Cyclone.h"
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/********************************************************************
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*
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* P R O T O T Y P E S
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*
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********************************************************************/
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Boolean IsItRegisterRoutine();
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unsigned long GetBaseAddress();
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pascal OSErr EnableVideoIn(GDHandle gdh);
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pascal OSErr DisableVideoIn(GDHandle gdh);
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/********************************************************************
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*
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* IsItRegisterRoutine: Will return true if the "Doing an open component"
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* for registering in the slot 0 PRAM vendor5 byte
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* is true
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*
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********************************************************************/
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Boolean IsItRegisterRoutine()
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{
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SpBlock aSpBlock;
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OSErr result;
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char spBytes[8];
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Boolean itsRegistering = false;
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aSpBlock.spSlot = 0;
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aSpBlock.spResult = (long) spBytes;
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result = SReadPRAMRec(&aSpBlock);
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if (result == noErr)
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{
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/* Is bit 6 ON */
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itsRegistering = (spBytes[6] &= (0x01 << spOpenComponent)) == 0 ? false : true ;
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}
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return (itsRegistering);
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}
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/********************************************************************
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*
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*
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*
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********************************************************************/
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pascal OSErr EnableVideoIn(GDHandle gdh)
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{
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OSErr retstat = noErr;
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VDFlag myFlag;
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CntrlParam pb;
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/* Check to see if video-in is not enabled */
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/* Setup the Control Parameter block */
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pb.ioCRefNum = (**gdh).gdRefNum;
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pb.ioCompletion = nil;
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pb.ioNamePtr = nil;
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pb.ioVRefNum = 0;
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pb.csCode = cscGetVideoIn;
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* (Ptr *) &pb.csParam[0] = (Ptr) (&myFlag);
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retstat = PBStatus((ParmBlkPtr) &pb,false);
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return (retstat);
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}
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/********************************************************************
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*
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*
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*
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********************************************************************/
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pascal OSErr DisableVideoIn(GDHandle gdh)
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{
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OSErr retstat = noErr;
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VDFlag myFlag;
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CntrlParam pb;
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/* Check to see if video-in is not enabled */
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/* Setup the Control Parameter block */
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pb.ioCRefNum = (**gdh).gdRefNum;
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pb.ioCompletion = nil;
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pb.ioNamePtr = nil;
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pb.ioVRefNum = 0;
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pb.csCode = cscGetVideoIn;
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* (Ptr *) &pb.csParam[0] = (Ptr) (&myFlag);
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retstat = PBStatus((ParmBlkPtr) &pb,false);
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return (retstat);
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}
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/********************************************************************
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*
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*
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*
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********************************************************************/
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unsigned long GetBaseAddress()
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{
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SpBlock mySpBlock;
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OSErr myError;
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mySpBlock.spParamData = 1;
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mySpBlock.spCategory = catDisplay;
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mySpBlock.spCType = typeVideo;
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mySpBlock.spDrvrSW = 0;
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mySpBlock.spDrvrHW = 0;
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mySpBlock.spTBMask = 3;
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mySpBlock.spSlot = 0;
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mySpBlock.spID = 0;
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mySpBlock.spExtDev = 0;
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myError = SNextTypeSRsrc(&mySpBlock);
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myError = SFindDevBase(&mySpBlock);
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return( (unsigned long) mySpBlock.spResult );
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}
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