From 3fa0bea577489ca80e91132d4b87210fbc14cef1 Mon Sep 17 00:00:00 2001
From: Holger Wirtz <wirtz@parasitstudio.de>
Date: Tue, 21 Mar 2023 09:13:29 +0100
Subject: [PATCH] Fixes for Synth_Dexed third-party library.

---
 third-party/Synth_Dexed/src/EngineMkI.h  | 1 +
 third-party/Synth_Dexed/src/EngineMsfa.h | 2 ++
 third-party/Synth_Dexed/src/EngineOpl.h  | 2 ++
 third-party/Synth_Dexed/src/fm_core.h    | 7 ++++---
 4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/third-party/Synth_Dexed/src/EngineMkI.h b/third-party/Synth_Dexed/src/EngineMkI.h
index a615841..b0762f5 100644
--- a/third-party/Synth_Dexed/src/EngineMkI.h
+++ b/third-party/Synth_Dexed/src/EngineMkI.h
@@ -26,6 +26,7 @@
 class EngineMkI : public FmCore {
 public:
     EngineMkI();
+    ~EngineMkI() {};
     void render(int32_t *output, FmOpParams *params, int32_t algorithm, int32_t *fb_buf, int32_t feedback_shift);
     
     void compute(int32_t *output, const int32_t *input, int32_t phase0, int32_t freq, int32_t gain1, int32_t gain2, bool add);
diff --git a/third-party/Synth_Dexed/src/EngineMsfa.h b/third-party/Synth_Dexed/src/EngineMsfa.h
index 0c7a6e0..d12fa94 100644
--- a/third-party/Synth_Dexed/src/EngineMsfa.h
+++ b/third-party/Synth_Dexed/src/EngineMsfa.h
@@ -23,5 +23,7 @@
 
 class EngineMsfa : public FmCore {
   public:
+    EngineMsfa() {};
+    ~EngineMsfa() {};
     void render(int32_t *output, FmOpParams *params, int32_t algorithm, int32_t *fb_buf, int32_t feedback_gain);
 };
diff --git a/third-party/Synth_Dexed/src/EngineOpl.h b/third-party/Synth_Dexed/src/EngineOpl.h
index 797681b..fe7f20b 100644
--- a/third-party/Synth_Dexed/src/EngineOpl.h
+++ b/third-party/Synth_Dexed/src/EngineOpl.h
@@ -28,6 +28,8 @@
 
 class EngineOpl : public FmCore {
 public:
+    EngineOpl() {};
+    ~EngineOpl() {};
     void render(int32_t *output, FmOpParams *params, int32_t algorithm, int32_t *fb_buf, int32_t feedback_shift);
     void compute(int32_t *output, const int32_t *input, int32_t phase0, int32_t freq, int32_t gain1, int32_t gain2, bool add);
     void compute_pure(int32_t *output, int32_t phase0, int32_t freq, int32_t gain1, int32_t gain2, bool add);
diff --git a/third-party/Synth_Dexed/src/fm_core.h b/third-party/Synth_Dexed/src/fm_core.h
index 353dbfc..8d23de1 100644
--- a/third-party/Synth_Dexed/src/fm_core.h
+++ b/third-party/Synth_Dexed/src/fm_core.h
@@ -46,10 +46,11 @@ class FmAlgorithm {
 
 class FmCore {
   public:
-    //virtual ~FmCore() {};
+    FmCore() {};
+    virtual ~FmCore() {};
     static void dump();
-    uint8_t get_carrier_operators(uint8_t algorithm);
-    virtual void render(int32_t *output, FmOpParams *params, int32_t algorithm, int32_t *fb_buf, int32_t feedback_gain);
+    static uint8_t get_carrier_operators(uint8_t algorithm);
+    virtual void render(int32_t *output, FmOpParams *params, int32_t algorithm, int32_t *fb_buf, int32_t feedback_gain) = 0;
   protected:
     AlignedBuf<int32_t, _N_>buf_[2];
     const static FmAlgorithm algorithms[32];