Faustian compiles still a nightmare - now something new...

[Lindon]

So Im trying to build a compressor using the std faust compressor library, and the dll compile proces sis giving me this :

D:\HISE\hi_dsp_library\snex_basics\snex_Types.h(1167,4): error C2148: total size of array must not exceed 0x7fffffff by
tes [C:\Current_HISE_work\Horizen\DspNetworks\Binaries\Builds\VisualStudio2022\Horizen_DynamicLibrary.vcxproj]
  (compiling source file '../../Source/Main.cpp')
  D:\HISE\hi_dsp_library\snex_basics\snex_Types.h(1167,4):
  the template instantiation context (the oldest one first) is
        C:\Current_HISE_work\Horizen\DspNetworks\Binaries\Source\Main.cpp(31,3):
        see reference to function template instantiation 'void scriptnode::dll::StaticLibraryHostFactory::registerPolyN
  ode<scriptnode::faust::faust_static_wrapper<1,scriptnode::parameter::empty_list,_myFaustCompTwoFile,project::myFaustC
  ompTwoFileMetaData,2>,scriptnode::faust::faust_static_wrapper<256,scriptnode::parameter::empty_list,_myFaustCompTwoFi
  le,project::myFaustCompTwoFileMetaData,2>>(void)' being compiled
        D:\HISE\hi_dsp_library\node_api\nodes\OpaqueNode.h(413,79):
        see reference to function template instantiation 'void scriptnode::OpaqueNode::create<PolyT>(void)' being compi
  led
          with
          [
              PolyT=scriptnode::faust::faust_static_wrapper<256,scriptnode::parameter::empty_list,_myFaustCompTwoFile,p
  roject::myFaustCompTwoFileMetaData,2>
          ]
        D:\HISE\hi_dsp_library\node_api\nodes\OpaqueNode.h(130,28):
        see reference to class template instantiation 'scriptnode::faust::faust_static_wrapper<256,scriptnode::paramete
  r::empty_list,_myFaustCompTwoFile,project::myFaustCompTwoFileMetaData,2>' being compiled
        D:\HISE\hi_faust\FaustStaticWrapper.h(29,27):
        see reference to class template instantiation 'snex::Types::PolyData<FaustClass,256>' being compiled
          with
          [
              FaustClass=_myFaustCompTwoFile
          ]

so it seems to be upset with my Faust code (myFaustCompTwoFile, which contains this:

// Faust Source File: myFaustCompTwoFile
// Created with HISE on 2024-07-23
import("stdfaust.lib");

//strength: strength of the compression (0 = no compression, 1 means hard limiting, >1 means over-compression)
//strength = hslider("Strength", 0, 0, 2, 0.01);

strength = co.ratio2strength(hslider("Ratio", 1, 1, 20, 0.01));
//thresh: dB level threshold above which compression kicks in
thresh = hslider("Thresh", 0, -60, 0, 0.1);
//att: attack time = time constant (sec) when level & compression going up
att = hslider("Attack", 0, 0, 2, 0.01);
//rel: release time = time constant (sec) coming out of compression
rel = hslider("Release", 0, 0, 3, 0.01);
//knee: a gradual increase in gain reduction around the threshold: below thresh-(knee/2) there is no gain reduction, above thresh+(knee/2) there is the same gain reduction as without a knee, and in between there is a gradual increase in gain reduction.
knee = hslider("knee", 0, 0, 8, 0.1);
//prePost: places the level detector either at the input or after the gain computer; this turns it from a linear return-to-zero detector into a log domain return-to-threshold detector
//prePost = hslider("Mode", 0, 0, 1, 1);
//link: the amount of linkage between the channels. 0 = each channel is independent, 1 = all channels have the same amount of gain reduction
//link = hslider("Link", 0, 0, 1, 0.01);

compress(left,right) = left,right : co.RMS_compression_gain_N_chan(strength,thresh,att,rel,knee,0,1,2) : *(left), *(right);

process = compress;

Does anyone have any idea what is going on here?

[Christoph Hart]

@Lindon looks like a compile error in the faust code generator - something is allocating an array too large for your compiler.

[Lindon]

@Christoph-Hart said in Faustian compiles still a nightmare - now something new...:

@Lindon looks like a compile error in the faust code generator - something is allocating an array too large for your compiler.

yes...but what? where? and how to fix it?

The compile process for the file executes fine...so it goes away and builds its cpp and .h files, but frankly its a pretty vanilla piece of code in faust I think...

[Christoph Hart]

@Lindon ah hold on, it seems to be in the wrapper code, maybe something is blowing up the parameter count.

[Christoph Hart]

So the problem was that the C++ code that is generated by the Faust example above indeed creates an object that has a compile-time array of around 8MB (most likely some delay buffers). The problem was that if by default, HISE also generated a polyphonic version, which multiplied this with the voice count, so you ended up with an object that is 2GB big, which made the compiler nope out of there.

I fixed it by changing the default to NOT create polyphonic versions of the FX, unless the faust / SNEX node is explicitely used in a network that has the AllowPolyphony flag set (or if it's a custom C++ node, if the node_properties.json file has defined the AllowPolyphony flag alongside with the isPolyphonic flag).

[Lindon]

@Christoph-Hart well done. Im just dropping this in as a master or send FX so no polyphony set at all.. so Im all good. thanks.

[clevername27]

@Christoph-Hart @Lindon Can you guys share what the case is for polyphonic vs master ScriptNode? As I understand, if I want the effect applied independently to every voice, I go polyphonic — if it's like a buss thing, then it's master. (All of my ScriptNode stuff distorts after it's been compiled, and I'm trying to. figure it out. Everything is poly.)