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Text File | 1995-02-07 | 2.2 KB | 86 lines | [TEXT/MPS ] |
- (*
- sendVideo cmd,opt - Send the command string cmd to the video player and wait for an
- acknowledgement. In the case of some players, the opt parameter supplies additional
- information or options on how to proceed:
-
- player opt meaning
- ———— ————————
- Sony If present, don't clear previous commands.
- Hitachi If present, wait for this as acknowledgement from player, rather than waiting
- for the command character sent.
-
- In the case of the Pioneer 6000 player, numeric parameters embedded in the cmd should be
- surrounded with periods (as in '.1000.'). sendVideo will then translate to the appropriate
- input to the player.
-
- To compile and link this file using Macintosh Programmer's Workshop,
-
- pascal -w sendVideo.p
-
- link -m ENTRYPOINT -o HyperCommands -rt XCMD=8005 -sn Main=sendVideo ∂
- sendVideo.p.o "{MPW}"Libraries:interface.o "{MPW}"PLibraries:PasLib.o
-
- Copyright © 1987,88 Apple Computer, Inc.
-
- 9/87 - Initial coding by Harry R. Chesley.
- 2/88 - Changed for new interface specification by Harry R. Chesley.
- *)
-
- {$R-}
-
- {$S sendVideo } { Segment name must be the same as the command name. }
-
- unit DummyUnit;
-
- interface
-
- uses MemTypes, QuickDraw, OSIntf, HyperXCmd;
-
- procedure EntryPoint(paramPtr: XCmdPtr);
-
- implementation
-
- type
-
- Str31 = String[31];
-
- procedure sendVideo(paramPtr: XCmdPtr); forward;
-
- procedure EntryPoint(paramPtr: XCmdPtr);
-
- begin
- sendVideo(paramPtr);
- end;
-
- procedure sendVideo(paramPtr: XCmdPtr);
-
- var numberOfParms: integer;
- str, str2: str255;
-
- {$I XCmdGlue.inc}
-
- procedure Fail(errMsg: Str255); { set theResult and quit }
- begin
- paramPtr^.returnValue := PasToZero(errMsg);
- exit(sendVideo);
- end;
-
- {$I VideoUtil.inc}
-
- begin
- numberOfParms := paramPtr^.paramCount;
- if (numberOfParms <> 1) and (numberOfParms <> 2) then Fail('parameter count is not 1 or 2');
-
- GetStrParm(1,str); { First parameter is the string to send. }
- if numberOfParms > 1 then GetStrParm(2,str2) { Second is the optional parameter for this player. }
- else str2 := '';
-
- { Clear out any pending input. }
- EvalAndDispose('RecvUpTo(empty,0,empty)');
-
- { Send it... }
- videoCmd('sendCmd',Concat('"',str,'","',str2,'"'));
- end;
-
- end.
-