How can I preserve variable names in C++ code generated by 'generateAudioPlugin -juceproject'

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Arkadiusz Lewandowski 2022-11-12

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https://ww2.mathworks.cn/matlabcentral/answers/1849368-how-can-i-preserve-variable-names-in-c-code-generated-by-generateaudioplugin-juceproject

评论： Arkadiusz Lewandowski 2022-11-25

I am generating C++ code from my audio plugin using 'generateAudioPlugin -juceproject'. Unfortunatelly, variable names in the C++ code often do not correspond the variable names in MATLAB code due to memory usage optimizations. How can I force 'generateAudioPlugin' to keep variable names consistent between MATLAB code and C++ code?

If I was working directly with 'codegen', I could pass 'coder.CodeConfig' object with property 'PreserveVariableNames' set to 'UserNames', however, I cannot find an option to pass this object to 'generateAudioPlugin'.

Any help will be appreciated!

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Jimmy Lapierre 2022-11-14

There is no option to do this now. If you can share a simple enough example where it would make sense, we could look into it further and consider making this an option or change the current behavior.

Arkadiusz Lewandowski 2022-11-25

在 MATLAB Online 中打开

Thanks for your reply!

Below is a very simple plugin code and an excerpt from the C++ code generated by 'generateAudioPlugin -juceproject'. As you can see some of the variable names are preserved ('Gain'), but the names of loop indices are not.

This is of course a very simple example and you can readily follow the MATLAB code along with the C++ code. However, I am working on a much more complicated piece of code, and when trying to do some tweeks in the C++ code, it becomes difficult to catch how it correponds to the MATLAB code. To make it harder, sometimes variables are reused to save memory and their names --- used in a different context --- do not make sense and cause some confusion. Thus, it would be very useful to be able to preserve the original MATLAB variable names in the generated C++ code.

---

MATLAB code:

classdef TestPlugin < audioPlugin
    properties
        Gain = 0.5;        
    end
    properties (Constant)
        PluginInterface = audioPluginInterface(...
            audioPluginParameter('Gain',...
            'DisplayName','Gain',...
            'Mapping',{'lin',0,1}))
    end
    methods
        function out = process(plugin, in)
            out=TestPlugin.applyGain(in, plugin.Gain);
        end       
        function set.Gain(plugin, val)
            plugin.Gain = val;
            
        end                                                                     
    end
    methods(Static)
        function out=applyGain(in, Gain)
            coder.inline('never')
            
            out=zeros(size(in));
        
            numSamples=size(in,1);
            for foo=1:numSamples
                out(foo,1)=Gain*in(foo,1);
            end
            for bar=1:numSamples
                out(bar,2)=Gain*in(bar,2);
            end                       
            
            
        end
    end
end

Part of C++ code:

void TestPlugin::applyGain(const coder::array<double, 2U> &in, double Gain, coder::array<double, 2U> &out)
{
  int i;
  int loop_ub;
  out.set_size(static_cast<int>(static_cast<short>(in.size(0))), 2);
  loop_ub = static_cast<short>(in.size(0)) << 1;
  for (i = 0; i < loop_ub; i++) {
    out[i] = 0.0;
  }
  i = in.size(0);
  for (loop_ub = 0; loop_ub < i; loop_ub++) {
    out[loop_ub] = Gain * in[loop_ub];
  }
  i = in.size(0);
  for (loop_ub = 0; loop_ub < i; loop_ub++) {
    out[loop_ub + out.size(0)] = Gain * in[loop_ub + in.size(0)];
  }
}

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How can I preserve variable names in C++ code generated by 'generateAudioPlugin -juceproject'

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