From cd43cac59b67fee68205fd0e721f2b2a28459880 Mon Sep 17 00:00:00 2001
From: Jean Pierre Cimalando <jp-dev@inbox.ru>
Date: Thu, 25 Feb 2021 00:01:56 +0100
Subject: [PATCH] Faust filters automatically generated

---
 src/CMakeLists.txt           | 30 ++++++++++++++++++++++++++++++
 src/sfizz/SfzFilterImpls.hpp | 20 ++++++++++----------
 2 files changed, 40 insertions(+), 10 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ee7dbc3b..cc19c67f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -310,6 +310,36 @@ endif()
 # Generic library alias
 add_library(sfizz::sfizz ALIAS sfizz_static)
 
+# Preserve generated files (Faust)
+set_directory_properties(PROPERTIES CLEAN_NO_CUSTOM TRUE)
+
+# Faust filters
+foreach(filter_type
+        Lpf1p Lpf2p Lpf4p Lpf6p Hpf1p Hpf2p Hpf4p Hpf6p
+        Bpf1p Bpf2p Bpf4p Bpf6p Apf1p Brf1p Brf2p
+        Pink Lpf2pSv Hpf2pSv Bpf2pSv Brf2pSv
+        Lsh Hsh Peq EqPeak EqLshelf EqHshelf)
+    add_faust_command(
+        "sfizz/dsp/filters/sfz_filters.dsp"
+        "sfizz/gen/filters/sfz${filter_type}.hxx"
+        DOUBLE IN_PLACE
+        PROCESS_NAME "sfz${filter_type}"
+        CLASS_NAME "faust${filter_type}"
+        SUPERCLASS_NAME "sfzFilterDsp"
+        IMPORT_DIRS "sfizz/dsp")
+    add_faust_command(
+        "sfizz/dsp/filters/sfz_filters.dsp"
+        "sfizz/gen/filters/sfz2ch${filter_type}.hxx"
+        DOUBLE IN_PLACE
+        PROCESS_NAME "sfz2ch${filter_type}"
+        CLASS_NAME "faust2ch${filter_type}"
+        SUPERCLASS_NAME "sfzFilterDsp"
+        IMPORT_DIRS "sfizz/dsp")
+    target_sources(sfizz_internal PRIVATE
+        "sfizz/gen/filters/sfz${filter_type}.hxx"
+        "sfizz/gen/filters/sfz2ch${filter_type}.hxx")
+endforeach()
+
 # Windows installer
 if(WIN32)
     include(VSTConfig)
diff --git a/src/sfizz/SfzFilterImpls.hpp b/src/sfizz/SfzFilterImpls.hpp
index 613a41d5..72bb0fb8 100644
--- a/src/sfizz/SfzFilterImpls.hpp
+++ b/src/sfizz/SfzFilterImpls.hpp
@@ -16,7 +16,7 @@ public:
 
     virtual void init(int) = 0;
     virtual void instanceClear() = 0;
-    virtual void compute(int, float **, float **) = 0;
+    virtual void compute(int, const float *const *, float *const *) = 0;
 
     virtual void configureStandard(float, float, float) {}
     virtual void configureEq(float, float, float) {}
@@ -105,8 +105,8 @@ protected:
 template <class F> struct sfzFilter : public F {
     void configureStandard(float cutoff, float q, float pksh) override
     {
-        F::fCutoff = cutoff;
-        F::fQ = q;
+        this->setCutoff(cutoff);
+        this->setResonance(q);
         (void)pksh;
     }
 };
@@ -118,7 +118,7 @@ template <class F> struct sfzFilter : public F {
 template <class F> struct sfzFilterNoQ : public F {
     void configureStandard(float cutoff, float q, float pksh) override
     {
-        F::fCutoff = cutoff;
+        this->setCutoff(cutoff);
         (void)q;
         (void)pksh;
     }
@@ -144,9 +144,9 @@ template <class F> struct sfzFilterNoCutoff : public F {
 template <class F> struct sfzFilterPkSh : public F {
     void configureStandard(float cutoff, float q, float pksh) override
     {
-        F::fCutoff = cutoff;
-        F::fQ = q;
-        F::fPkShGain = pksh;
+        this->setCutoff(cutoff);
+        this->setResonance(q);
+        this->setPeakShelfGain(pksh);
     }
 };
 
@@ -157,9 +157,9 @@ template <class F> struct sfzFilterPkSh : public F {
 template <class F> struct sfzFilterEq : public F {
     void configureEq(float cutoff, float bw, float pksh) override
     {
-        F::fCutoff = cutoff;
-        F::fBandwidth = bw;
-        F::fPkShGain = pksh;
+        this->setCutoff(cutoff);
+        this->setBandwidth(bw);
+        this->setPeakShelfGain(pksh);
     }
 };