Create Interfase on HISE to be used on JUCE

Christoph Hart

Hmm, I think it's a little bit over your head to make a proper wrapper for that code (also I think I need to tinker with the compiler flags to see if I can change the code a little bit as there are a few annoying things in it). The most promising solution would be if I just create a wrapper node for faust code that you then can use.

hisefilo

@Christoph-Hart said in Create Interfase on HISE to be used on JUCE:

The most promising solution would be if I just create a wrapper node for faust code that you then can use.

That would be awesome and a way to many faust users to get into HISE (Faust lacks of GUI designer)

JOS will be so happy if that happens :)
This is the faust2juce script if it helps

#! /bin/bash -e

#####################################################################
#                                                                   #
#           Compiles Faust programs to JUCE standalone or plugin    #
#           (c) Grame, 2016-2019                                    #
#                                                                   #
#####################################################################

. faustpath
. faustoptflags
. usage.sh

CXXFLAGS=$MYGCCFLAGS

DEBUG=false

#-------------------------------------------------------------------
#PHASE 1 : dispatch command arguments
#-------------------------------------------------------------------

OSCLIB=""
POLY="POLY"
DEF=""
EFFECT=""
NVOICES=-1
STANDALONE="0"
IS_SYNTH="0"
IS_MIDI="0"
IS_LLVM="0"
JUCE_POLY="0"
FAUSTFLOAT="float"
JUCER=""
JUCE_MODULES_DIR="\.\.\/\.\.\/modules"  # By default, the generated folder is supposed to be copied in JUCE/examples folder

while [ $1 ]
do
    p=$1

    if [ $p = "--help" ] || [ $p = "-help" ] || [ $p = "-h" ]; then
        usage faust2juce "[options] [Faust options] <file.dsp>"
        require Juce 
        echo "Compiles Faust programs to JUCE standalone or plugin."
        option
        options -osc -midi -soundfile
        option "-nvoices <num>"
        option "-effect <effect.dsp>"
        option "-effect auto"
        option -standalone "to produce a standalone project, otherwise a plugin project is generated"
        option -"jucemodulesdir <folder>" "to set JUCE modules directory to <folder>, such as ~/JUCE/modules"
        option -jsynth "to use JUCE polyphonic Synthesizer instead of Faust polyphonic code"
        option -llvm "to use the LLVM compilation chain (OSX and Linux for now)"
        exit
    fi

    if [ "$p" = -debug ]; then
    	DEBUG=true
    elif [ $p = "-nvoices" ]; then
        shift
        NVOICES=$1
    elif [ $p = "-standalone" ]; then
        STANDALONE="1"
    elif [ $p = "-effect" ]; then
        DEF+="POLY2 "
        POLY="POLY2"
        shift
        EFFECT=$1
    elif [ $p = "-jucemodulesdir" ]; then
	    shift
	    JUCE_MODULES_DIR=$(echo $1 | sed -e 's/\//\\\//g')
    elif [ $p = "-jsynth" ]; then
        DEF+="JUCE_POLY "
        JUCE_POLY="1"
    elif [ $p = "-midi" ]; then
        DEF+="MIDICTRL "
        IS_MIDI="1"
    elif [ $p = "-osc" ]; then
    	DEF+="OSCCTRL "
	elif [ $p = "-llvm" ]; then
		IS_LLVM="1"
    elif [ $p = "-soundfile" ]; then
        DEF+="SOUNDFILE "
    elif [ ${p:0:1} = "-" ]; then
        if [ $p = "-double" ]; then
            FAUSTFLOAT="double"
        fi
	    OPTIONS="$OPTIONS $p"
	elif [[ -f "$p" ]]; then
	    FILES="$FILES $p"
	else
	    OPTIONS="$OPTIONS $p"        
	fi

shift

done

# configure JUCER file

if [ $STANDALONE = "1" ]; then
    if [ $IS_LLVM = "1" ]; then
        JUCER="standalone-llvm.jucer"
    else
        JUCER="standalone.jucer"
    fi
else
    if [ $IS_LLVM = "1" ]; then
        JUCER="plugin-llvm.jucer"
    else
        JUCER="plugin.jucer"
    fi
fi

if [ $STANDALONE = "1" ] && [ $JUCE_POLY = "1" ]; then
    echo "Cannot use -standalone with -jsynth"
    exit
fi

if [ $POLY = "POLY2" ] && [ $JUCE_POLY = "1" ]; then
    echo "Cannot use -effect with -jsynth"
    exit
fi

#look for polyphonic "nvoices" metadata in the DSP file

grep "declare nvoices" $FILES && IS_SYNTH="1" 2>/dev/null

#-------------------------------------------------------------------
# compile the *.dsp files
#-------------------------------------------------------------------

for p in $FILES; do

    CUR=$(pwd)
    f=$(basename "$p")
	SRCDIR=$(dirname "$p")

    # creates the dir 
    dspName="${f%.dsp}"
    SUB_TYPE=$(shasum $p)
    SUB_TYPE=${SUB_TYPE:0:4}
    rm -rf "$SRCDIR/$dspName"
 
    if [ $STANDALONE = "0" ]; then
        cp -r $FAUSTARCH/juce/plugin "$SRCDIR/$dspName/"
        # setting plugin name to match the dsp
        sed -e "s/SUB_TYPE/$SUB_TYPE/g" "$SRCDIR/$dspName/$JUCER" >> "$SRCDIR/$dspName/$dspName-temp.jucer"
    else
        cp -r $FAUSTARCH/juce/standalone "$SRCDIR/$dspName/"
        # setting project name to match the dsp
        sed -e "s/ProjectTitle/$dspName/g" "$SRCDIR/$dspName/$JUCER" >> "$SRCDIR/$dspName/$dspName-temp.jucer"
    fi

    # setting the preprocessing definitions
    sed -e "s/PreProcDef/$DEF/g" "$SRCDIR/$dspName/$dspName-temp.jucer" >> "$SRCDIR/$dspName/$dspName-temp0.jucer"
    sed -e "s/APPL_NAME/$dspName/g" "$SRCDIR/$dspName/$dspName-temp0.jucer" >> "$SRCDIR/$dspName/$dspName-temp1.jucer"

    # MIDI
    sed -e "s/IS_MIDI/$IS_MIDI/g" "$SRCDIR/$dspName/$dspName-temp1.jucer" >> "$SRCDIR/$dspName/$dspName-temp2.jucer"

    # SYNTH
    sed -e "s/IS_SYNTH/$IS_SYNTH/g" "$SRCDIR/$dspName/$dspName-temp2.jucer" >> "$SRCDIR/$dspName/$dspName-temp3.jucer"

    # FAUSTFLOAT
    sed -e "s/FAUST_FLOAT/$FAUSTFLOAT/g" "$SRCDIR/$dspName/$dspName-temp3.jucer" >> "$SRCDIR/$dspName/$dspName-temp4.jucer"

    # JUCE_MODULES_DIR
    sed -e "s/JUCE_MODULES_DIR_DEFAULT/$JUCE_MODULES_DIR/g" "$SRCDIR/$dspName/$dspName-temp4.jucer" >> "$SRCDIR/$dspName/$dspName-temp5.jucer"

    # possibly set NVOICES value
    if [ $NVOICES -ge 0 ]; then
        sed -e "s/NUM_VOICES/$NVOICES/g" "$SRCDIR/$dspName/$dspName-temp5.jucer" >> "$SRCDIR/$dspName/$dspName.jucer"
    else
        cp "$SRCDIR/$dspName/$dspName-temp5.jucer" "$SRCDIR/$dspName/$dspName.jucer"
    fi

    # standalone or plugin mode
    if [ $STANDALONE = "0" ]; then
        rm "$SRCDIR/$dspName/plugin-llvm.jucer" "$SRCDIR/$dspName/plugin.jucer"
    else
        rm "$SRCDIR/$dspName/standalone-llvm.jucer" "$SRCDIR/$dspName/standalone.jucer"
    fi
  
    rm "$SRCDIR/$dspName/$dspName-temp.jucer"  "$SRCDIR/$dspName/$dspName-temp0.jucer" 
    rm "$SRCDIR/$dspName/$dspName-temp1.jucer" "$SRCDIR/$dspName/$dspName-temp2.jucer"
    rm "$SRCDIR/$dspName/$dspName-temp3.jucer" "$SRCDIR/$dspName/$dspName-temp4.jucer" 
    rm "$SRCDIR/$dspName/$dspName-temp5.jucer"

    # standalone of plugin mode
    if [ $STANDALONE = "0" ]; then
        if [ $IS_LLVM = "1" ]; then
            faust -inj $FAUSTINC/faust/dsp/llvm-dsp-adapter.h -uim -i -a $FAUSTARCH/juce/juce-plugin.cpp $OPTIONS "$SRCDIR/$f" -o "$SRCDIR/$dspName/FaustPluginProcessor.cpp" || exit
            dynamic-faust $OPTIONS "$SRCDIR/$f" -o "$SRCDIR/$dspName/dynamic.o"
        else
            faust -uim -i -a $FAUSTARCH/juce/juce-plugin.cpp $OPTIONS "$SRCDIR/$f" -o "$SRCDIR/$dspName/FaustPluginProcessor.cpp" || exit
        fi
    else
        if [ $IS_LLVM = "1" ]; then
            faust -inj $FAUSTINC/faust/dsp/llvm-dsp-adapter.h -i -a $FAUSTARCH/juce/juce-standalone.cpp $OPTIONS "$SRCDIR/$f" -o "$SRCDIR/$dspName/FaustAudioApplication.cpp" || exit
            dynamic-faust $OPTIONS "$SRCDIR/$f" -o "$SRCDIR/$dspName/dynamic.o"
        else
            faust -i -a $FAUSTARCH/juce/juce-standalone.cpp $OPTIONS "$SRCDIR/$f" -o "$SRCDIR/$dspName/FaustAudioApplication.cpp" || exit
        fi
    fi

    if [ $POLY = "POLY2" ]; then
        if [ $EFFECT = "auto" ]; then
            cat > $SRCDIR/$dspName/effect.dsp << EndOfCode
            adapt(1,1) = _;
            adapt(2,2) = _,_;
            adapt(1,2) = _ <: _,_;
            adapt(2,1) = _,_ :> _;
            adaptor(F,G) = adapt(outputs(F),inputs(G));
            process = adaptor(library("$SRCDIR/$f").process, library("$SRCDIR/$f").effect) : library("$SRCDIR/$f").effect;
EndOfCode
            faust -i -cn effect -a minimal-effect.cpp "$SRCDIR/$dspName/effect.dsp" -o "$SRCDIR/$dspName/effect.h" || exit
            rm "$SRCDIR/$dspName/effect.dsp"
        else
            faust -i -cn effect -a minimal-effect.cpp "$SRCDIR/$EFFECT" -o "$SRCDIR/$dspName/effect.h" || exit
        fi
    fi

done

ustk

@hisefilo Just to understand, what is the benefit of using Faust?
For what I see, everything can be made directly with scriptnode/snex right?
Easier than snex maybe?

d.healey

@ustk Faust is less buggy :p

But I've stopped playing with Faust for now because I'd rather use the new (less buggy?) version of SNEX when it's ready.

hisefilo

@ustk it's being developed for years and a huge library is there (Many of them developed by JOS)
i.e. you may have an analog modelled filter in just a few lines of code

Faust Programming Language

(faust.grame.fr)

hisefilo

@d-healey I haven't realised yet what SNEX will allow me to do. C++ is kinda obscure zone for me.

Faust does the compile thing to turn this one line thingy into a physically modelled trumpet on C++

process = pm.trumpet <: _,_;

Dan Korneff

@Christoph-Hart said in Create Interfase on HISE to be used on JUCE:

The most promising solution would be if I just create a wrapper node for faust code that you then can use.

Maybe one for my Matlab models too? ;)

d.healey

@hisefilo I played around with those physical models, that particular function though is just a wrapper around the STK. It's good for demonstration but you don't have any control over the components.

I rebuilt the Faust pm.flute inside Faust so that I could control each element and change the bits I didn't like, it wasn't one line :p I want to rebuild it in HISE at some point.

hisefilo

@d-healey said in Create Interfase on HISE to be used on JUCE:

I want to rebuild it in HISE at some point.

Yeah, me too.

hisefilo

@d-healey Do you know if SNEX will require C++ knowledge for creating custom stuff?? Like an Karplus-Strong modified algo or an oscillator able to read data tables?

d.healey

@hisefilo https://docs.hise.audio/scriptnode/manual/snex.html

hisefilo

@d-healey said in Create Interfase on HISE to be used on JUCE:

@hisefilo https://docs.hise.audio/scriptnode/manual/snex.html

Yes, being there. Needs a lot of C++ skills

d.healey

@hisefilo It's very simplified though, doesn't look much worse than Javascript

for(auto& sample: block)
{
    sample = (float)Math.sin(uptime);
    uptime += 0.002;
}

The only bit there I don't really understand is auto& but I'm sure it's not too tricky to figure out.

Christoph Hart

This doc is slightly outdated as there have been many additions to SNEX. Basically SNEX is C++ minus all stuff that you don't need for DSP:

String operations (there's even not a text data type)
File I/O or other OS stuff
inheritance and constructor / destructors of objects
pointer syntax, so any reference to memory is being done via the reference operator &. I chose to do this because it's much harder to create a null reference using this approach which makes the language a bit more stable (especially in a prototyping context).

However I would say that it's halfway between HiseScript and C++. Sure you have to use proper typing (in HiseScript / Javascript it doesn't matter if a number is a integer or floating point number, but since SNEX directly creates machine code, it needs strict typing to emit the correct assembly.

var x = 12 + 0.5; // OK in HiseScript
float x = 12 + 0.5; // type mismatch, will print a warning and cast implicitely to float.

The example that David posted is trivially portable to HiseScript:

for(auto& sample: block)
{
    sample = (float)Math.sin(uptime);
    uptime += 0.002;
}

// in HiseScript:

for(sample in block)
{
    sample = Math.sin(uptime);
    uptime += 0.002;
}

The Math class is almost 100% identical in SNEX and HiseScript so this eases the pain a bit :)
About the auto&: In SNEX you have the same range-based for loop as in Javascript (give it an array and it will iterate from the start to the end). However since it's strictly typed, you need to declare the element type of the block array that you want to iterate. auto is just a way of letting the compiler figure out the type itself, so it removes redundancy:

auto x = 12; // x is an int;
int x = 12;  // same statement but you have to figure out the type yourself.

auto y = 12.0f; // x is a float (the f postfix indicates single precision)

Now the & operator means "reference to" and tells the compiler to operate on the oringal data itself. Outside a loop it can be used like this:

int x = 126;
auto& refX = x;

refX = 100; // x is also 100 now

auto noRef = x; // omit the & makes a copy
noRef = 9000; // is still 100

Now if you write the loop without the & like this:

for(auto sample: block)
{
    sample = (float)Math.sin(uptime);
    uptime += 0.002;
}

it is still valid C++ / SNEX syntax, but it will not have an effect because the sample variable will not point to the actual element in the array, but a copy of the value (like noRef in the example above), so the sine wave is being rendered into nirvana.

hisefilo

@Christoph-Hart Thanks you!!!!!

well! I guess I started learning SNEX now!
I'm on January Scriptnode. Should I find a new working commit ? (MacOS)

d.healey

@hisefilo Wait for HISE 3 :D

Christoph Hart

Yeah I can‘t recommend diving into SNEX at the moment (especially on macOS), I‘m afraid you need to wait a few more weeks.

hisefilo

@Christoph-Hart @d-healey already diving into (yeah I'm that anxious) . I need to solve a DSP thingy some how... so I will adapt it later to the new SNEX I guess.

I'm sketching in Faust, and trying to reproduce that on SNEX....

Create Interfase on HISE to be used on JUCE

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