11-01-2019, 03:04 PM
Trying to use Indy to send OSC (open sound control) messages to a Behringer X32 mixer. If the message is just text, it works fine. The issue is a message of the format "/ch/01/mix/fader ,f .3". The .3 needs to be sent as 4 bytes. What needs to go out is "3E 99 99 9A". What the idudpclient sends is "3E 3F 3F 3F". The same problem exists for .4 (3E CC CC CD vs. 3E 3F 3F 3F). Once you get to .5 and greater, things work again because the second byte is smaller. e.g. .5 = 3F 00 00 00 > 3F 00 00 00, .6 = 3F 19 99 9A > 3F 19 3F 3F).
I'm using Indy 10 and Delphi Rio. Here is the sending subroutine. I've commented out several different approaches, all of which give the same result.
procedure TCPForm1.OSCSendMsg;
var
OutValueStr: String;
I: Integer;
J: Tbytes;
B1: TIdbytes;
begin
If Length(CommandStr) > 0 then begin
OscCommandStr := PadStr(CommandStr); //convert CommandStr to OSC string
If TypeStr='' then OscCommandStr := OscCommandStr+','+#0+#0+#0;
If Length(TypeStr) = 1 then begin
If TypeStr='i' then Begin // Parameter is an integer
I := swapendian(IValue); //change to big endian
OscCommandStr := OscCommandStr+','+TypeStr+#0+#0+IntToCharStr(I);
OutValueStr := IntToStr(IValue);
end;
If TypeStr='f' then Begin // Parameter is a float (real)
I := swapendian(PInteger(@FValue)^); //typecast & change to big endian
//I := htonl(PInteger(@FValue)^); //typecast & change to big endian
//J := MakeOSCFloat(FValue);
OscCommandStr := OscCommandStr+','+TypeStr+#0+#0+IntToCharStr(I);
//OscCommandStr := OscCommandStr+','+TypeStr+#0+#0+char(J[0])+char(J[1])+char(J[2])+char(J[3]);
OutValueStr := FloatToStr(FValue);
end;
end;
//IdUDPClient2.Send(OSCCommandStr,IndyTextEncoding_UTF8);
//IdUDPClient2.Send(OSCCommandStr);
B1 := toBytes(OSCCommandStr);
IdUDPClient2.SendBuffer(B1);
if loglevel>0 then logwrite('OSC= '+ hexstr(OSCCommandStr));
Wait(UDPtime);
// if loglevel>0 then logwrite('OSC '+ OSCCommandStr);
end;
end;
function TCPForm1.IntToCharStr(I : Integer) : String;
var
CharStr : String;
MyArray: array [0..3] of Byte;
J: Integer;
begin
For J :=0 to 3 do MyArray[J] := 0;
Move(I, MyArray, 4); //typeset conversion from integer to array of byte
CharStr := '';
For J :=0 to 3 do //convert array of byte to string
CharStr := CharStr+char(MyArray[J]);
IntToCharStr := CharStr;
end;
Any insight you can share would be welcome. Thank you.
..Dave
I'm using Indy 10 and Delphi Rio. Here is the sending subroutine. I've commented out several different approaches, all of which give the same result.
procedure TCPForm1.OSCSendMsg;
var
OutValueStr: String;
I: Integer;
J: Tbytes;
B1: TIdbytes;
begin
If Length(CommandStr) > 0 then begin
OscCommandStr := PadStr(CommandStr); //convert CommandStr to OSC string
If TypeStr='' then OscCommandStr := OscCommandStr+','+#0+#0+#0;
If Length(TypeStr) = 1 then begin
If TypeStr='i' then Begin // Parameter is an integer
I := swapendian(IValue); //change to big endian
OscCommandStr := OscCommandStr+','+TypeStr+#0+#0+IntToCharStr(I);
OutValueStr := IntToStr(IValue);
end;
If TypeStr='f' then Begin // Parameter is a float (real)
I := swapendian(PInteger(@FValue)^); //typecast & change to big endian
//I := htonl(PInteger(@FValue)^); //typecast & change to big endian
//J := MakeOSCFloat(FValue);
OscCommandStr := OscCommandStr+','+TypeStr+#0+#0+IntToCharStr(I);
//OscCommandStr := OscCommandStr+','+TypeStr+#0+#0+char(J[0])+char(J[1])+char(J[2])+char(J[3]);
OutValueStr := FloatToStr(FValue);
end;
end;
//IdUDPClient2.Send(OSCCommandStr,IndyTextEncoding_UTF8);
//IdUDPClient2.Send(OSCCommandStr);
B1 := toBytes(OSCCommandStr);
IdUDPClient2.SendBuffer(B1);
if loglevel>0 then logwrite('OSC= '+ hexstr(OSCCommandStr));
Wait(UDPtime);
// if loglevel>0 then logwrite('OSC '+ OSCCommandStr);
end;
end;
function TCPForm1.IntToCharStr(I : Integer) : String;
var
CharStr : String;
MyArray: array [0..3] of Byte;
J: Integer;
begin
For J :=0 to 3 do MyArray[J] := 0;
Move(I, MyArray, 4); //typeset conversion from integer to array of byte
CharStr := '';
For J :=0 to 3 do //convert array of byte to string
CharStr := CharStr+char(MyArray[J]);
IntToCharStr := CharStr;
end;
Any insight you can share would be welcome. Thank you.
..Dave