Support for the reset CC

src/sfizz/MidiState.cpp

@@ -92,3 +92,13 @@ void sfz::MidiState::reset() noexcept
     for (auto& bendValue: pitchBends)
         bendValue = 0;
 }
+
+void sfz::MidiState::resetAllControllers(int channel) noexcept
+{
+    ASSERT(channel >= 0 && channel < 16);
+
+    for (int idx = 0; idx < config::numCCs; idx++)
+        cc[channel][idx] = 0;
+
+    pitchBends[channel] = 0;
+}

src/sfizz/MidiState.h

@@ -90,6 +90,13 @@ public:
      */
     void reset() noexcept;
 
+    /**
+     * @brief Res
+     * 
+     * @param channel 
+     */
+    void resetAllControllers(int channel) noexcept;
+
 private:
     template<class T>
     using ChannelArray = std::array<T, 16>;

src/sfizz/Synth.cpp

@@ -443,16 +443,19 @@ void sfz::Synth::cc(int delay, int channel, int ccNumber, uint8_t ccValue) noexc
     ASSERT(ccNumber < config::numCCs);
     ASSERT(ccNumber >= 0);
 
-
     AtomicGuard callbackGuard { inCallback };
     if (!canEnterCallback)
         return;
 
+    if (ccNumber == config::resetCC) {
+        resetAllControllers(delay, channel);
+        return;
+    }
+
     midiState.ccEvent(channel, ccNumber, ccValue);    
     for (auto& voice : voices)
         voice->registerCC(delay, channel, ccNumber, ccValue);
 
-
     for (auto& region : ccActivationLists[ccNumber]) {
         if (region->registerCC(channel, ccNumber, ccValue)) {
             auto voice = findFreeVoice();
@@ -607,3 +610,22 @@ void sfz::Synth::disableFreeWheeling() noexcept
         DBG("Disabling freewheeling");
     }
 }
+
+void sfz::Synth::resetAllControllers(int delay, int channel) noexcept
+{
+    AtomicGuard callbackGuard { inCallback };
+    if (!canEnterCallback)
+        return;
+
+    midiState.resetAllControllers(channel);
+    for (auto& voice: voices) {
+        voice->registerPitchWheel(delay, channel, 0);
+        for (int cc = 0; cc < config::numCCs; ++cc)
+            voice->registerCC(delay, channel, cc, 0);
+    }
+
+    for (auto& region: regions) {
+        for (int cc = 0; cc < config::numCCs; ++cc)
+            region->registerCC(channel, cc, 0);
+    }
+}

src/sfizz/Synth.h

@@ -359,6 +359,15 @@ protected:
     void callback(absl::string_view header, const std::vector<Opcode>& members) final;
 
 private:
+    /**
+     * @brief Reset all CCs; to be used on CC 121
+     * 
+     * @param delay the delay for the controller reset
+     * @param channel the channel on which to reset the controller
+     * 
+     */
+    void resetAllControllers(int delay, int channel) noexcept;
+
     int numGroups { 0 };
     int numMasters { 0 };
     int numCurves { 0 };