Converting to Delphi, need some help
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be...@broadcastpartners.nl
Jul 25, 2016, 7:41:40 AM7/25/16
to ember-plus-development
Several years ago I succesfully converted the Ember C++ code to Delphi to work with Studer mixing consoles.
Now I have to focus on interfacing with Lawo mixing consoles, so I started with Ember+ 1.7.0.
I managed to compile a libember_slim.dll and converted the C++ header files to Delphi.
The first project is part of the __sample_consumer.c example program, specifically the GetDirectory command.
The program I have is very simple, but it crashes in various ways.It either allocates 1304 bytes of memory, releases the memory and calls EmberThrowError with "buffer overrun", or it crashes on glowReader_init with a similar 1304 value.
The differences between the crashes are related to declaring functions as stdcall or cdecl.
It is obvious that I must have made a mistake in converting the code from C++ to Delphi but with 5.000 lines of code it is hard to find a starting point.
Is someone able to give me some hints? Do I have to declare the functions as stdcall (which is what I would assume), have the structs to be declared as 'packed record'?
Now I have to focus on interfacing with Lawo mixing consoles, so I started with Ember+ 1.7.0.
I managed to compile a libember_slim.dll and converted the C++ header files to Delphi.
The first project is part of the __sample_consumer.c example program, specifically the GetDirectory command.
The program I have is very simple, but it crashes in various ways.It either allocates 1304 bytes of memory, releases the memory and calls EmberThrowError with "buffer overrun", or it crashes on glowReader_init with a similar 1304 value.
The differences between the crashes are related to declaring functions as stdcall or cdecl.
It is obvious that I must have made a mistake in converting the code from C++ to Delphi but with 5.000 lines of code it is hard to find a starting point.
Is someone able to give me some hints? Do I have to declare the functions as stdcall (which is what I would assume), have the structs to be declared as 'packed record'?
be...@broadcastpartners.nl
Jul 27, 2016, 10:06:26 AM7/27/16
to ember-plus-development
I have figured out that the functions have to be declared as cdecl which is not the default for Windows.
Structs must not be declared as packed record, just record.
Structs must not be declared as packed record, just record.
be...@broadcastpartners.nl
Jul 27, 2016, 10:36:10 AM7/27/16
to ember-plus-development
The following code sends a GetDirectory command to the provider:
As a result I get 53 bytes and after decoding it says 'Crystal' which is the name of the mixing console.
How do I get the children of this node?
How do I subscribe/unsubscribe to: Sources --> Fader --> Motor dB Value, or:Sources --> States --> PFL1 active?
ZeroMemory(@MyGlowCommand, SizeOf(GlowCommand));
MyGlowCommand.number := Integer(GlowCommandType_GetDirectory);
glowOutput_init(@MyGlowOutput, @Buffer, BufferSize, 0);
glowOutput_beginPackage(@MyGlowOutput, true);
glow_writeQualifiedCommand(
@MyGlowOutput,
@MyGlowCommand,
FSession.pCursorPath,
FSession.cursorPathLength,
FSession.pCursor.type_);
Size := glowOutput_finishPackage(@MyGlowOutput);As a result I get 53 bytes and after decoding it says 'Crystal' which is the name of the mixing console.
How do I get the children of this node?
How do I subscribe/unsubscribe to: Sources --> Fader --> Motor dB Value, or:Sources --> States --> PFL1 active?
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