Handle extended CCs 140 and 141 (keydelta)

src/sfizz/Config.h

@@ -20,15 +20,17 @@ namespace sfz {
 
 enum ExtendedCCs {
     pitchBend = 128,
-    channelAftertouch,
+    channelAftertouch = 129,
-    polyphonicAftertouch,
+    polyphonicAftertouch = 130,
-    noteOnVelocity,
+    noteOnVelocity = 131,
-    noteOffVelocity,
+    noteOffVelocity = 132,
-    keyboardNoteNumber,
+    keyboardNoteNumber = 133,
-    keyboardNoteGate,
+    keyboardNoteGate = 134,
-    unipolarRandom,
+    unipolarRandom = 135,
-    bipolarRandom,
+    bipolarRandom = 136,
-    alternate
+    alternate = 137,
+    keydelta = 140,
+    absoluteKeydelta = 141,
 };
 
 namespace config {

src/sfizz/MidiState.cpp

@@ -19,7 +19,13 @@ void sfz::MidiState::noteOnEvent(int delay, int noteNumber, float velocity) noex
     ASSERT(velocity >= 0 && velocity <= 1.0);
 
     if (noteNumber >= 0 && noteNumber < 128) {
-        velocityOverride = lastNoteVelocities[lastNotePlayed];
+        float keydelta { 0 };
+
+        if (lastNotePlayed >= 0) {
+            keydelta = static_cast<float>(noteNumber - lastNotePlayed);
+            velocityOverride = lastNoteVelocities[lastNotePlayed];
+        }
+
         lastNoteVelocities[noteNumber] = velocity;
         noteOnTimes[noteNumber] = internalClock + static_cast<unsigned>(delay);
         lastNotePlayed = noteNumber;
@@ -29,6 +35,8 @@ void sfz::MidiState::noteOnEvent(int delay, int noteNumber, float velocity) noex
         ccEvent(delay, ExtendedCCs::unipolarRandom, unipolarDist(Random::randomGenerator));
         ccEvent(delay, ExtendedCCs::bipolarRandom, bipolarDist(Random::randomGenerator));
         ccEvent(delay, ExtendedCCs::keyboardNoteGate, activeNotes > 0 ? 1.0f : 0.0f);
+        ccEvent(delay, ExtendedCCs::keydelta, keydelta);
+        ccEvent(delay, ExtendedCCs::absoluteKeydelta, std::abs(keydelta));
         activeNotes++;
 
         ccEvent(delay, ExtendedCCs::alternate, alternate);
@@ -235,7 +243,7 @@ void sfz::MidiState::reset() noexcept
     velocityOverride = 0.0f;
     activeNotes = 0;
     internalClock = 0;
-    lastNotePlayed = 0;
+    lastNotePlayed = -1;
     noteStates.reset();
     absl::c_fill(noteOnTimes, 0);
     absl::c_fill(noteOffTimes, 0);

src/sfizz/MidiState.h

@@ -241,7 +241,7 @@ private:
     /**
      * @brief Last note played
      */
-    int lastNotePlayed { 0 };
+    int lastNotePlayed { -1 };
 
     /**
      * @brief Current known values for the CCs.

src/sfizz/Region.cpp

@@ -1721,6 +1721,8 @@ bool sfz::Region::processGenericCc(const Opcode& opcode, OpcodeSpec<float> spec,
         case ExtendedCCs::unipolarRandom: // fallthrough
         case ExtendedCCs::bipolarRandom: // fallthrough
         case ExtendedCCs::alternate:
+        case ExtendedCCs::keydelta:
+        case ExtendedCCs::absoluteKeydelta:
             conn->source = ModKey(ModId::PerVoiceController, id, p);
             break;
         default:

src/sfizz/RegionStateful.cpp

@@ -25,9 +25,9 @@ float baseVolumedB(const Region& region, const MidiState& midiState, int noteNum
 uint64_t sampleOffset(const Region& region, const MidiState& midiState) noexcept
 {
     std::uniform_int_distribution<int64_t> offsetDistribution { 0, region.offsetRandom };
-    uint64_t finalOffset = region.offset + offsetDistribution(Random::randomGenerator);
+    int64_t finalOffset = region.offset + offsetDistribution(Random::randomGenerator);
     for (const auto& mod: region.offsetCC)
-        finalOffset += static_cast<uint64_t>(mod.data * midiState.getCCValue(mod.cc));
+        finalOffset += static_cast<int64_t>(mod.data * midiState.getCCValue(mod.cc));
     return Default::offset.bounds.clamp(finalOffset);
 }
 

src/sfizz/Synth.cpp

@@ -340,7 +340,7 @@ void Synth::Impl::handleGlobalOpcodes(const std::vector<Opcode>& members)
 
 void Synth::Impl::handleGroupOpcodes(const std::vector<Opcode>& members, const std::vector<Opcode>& masterMembers)
 {
-    absl::optional<int> groupIdx;
+    absl::optional<int64_t> groupIdx;
     absl::optional<unsigned> maxPolyphony;
 
     const auto parseOpcode = [&](const Opcode& rawMember) {

src/sfizz/Voice.cpp

@@ -399,6 +399,7 @@ void Voice::Impl::updateExtendedCCValues() noexcept
     extendedCCValues_.bipolar = midiState.getCCValue(ExtendedCCs::bipolarRandom);
     extendedCCValues_.alternate = midiState.getCCValue(ExtendedCCs::alternate);
     extendedCCValues_.noteGate = midiState.getCCValue(ExtendedCCs::keyboardNoteGate);
+    extendedCCValues_.keydelta = midiState.getCCValue(ExtendedCCs::keydelta);
 }
 
 bool Voice::startVoice(Layer* layer, int delay, const TriggerEvent& event) noexcept

src/sfizz/Voice.h

@@ -26,6 +26,7 @@ struct ExtendedCCValues {
     float bipolar {};
     float noteGate {};
     float alternate {};
+    float keydelta {};
 };
 
 /**

src/sfizz/modulations/sources/Controller.cpp

@@ -170,6 +170,20 @@ void ControllerSource::generate(const ModKey& sourceKey, NumericId<Voice> voiceI
             canShortcut = true;
             break;
         }
+    case ExtendedCCs::keydelta: {
+            const auto voice = impl_->voiceManager_->getVoiceById(voiceId);
+            const float fillValue = voice ? voice->getExtendedCCValues().keydelta : 0.0f;
+            sfz::fill(buffer, quantize(fillValue));
+            canShortcut = true;
+            break;
+        }
+    case ExtendedCCs::absoluteKeydelta: {
+            const auto voice = impl_->voiceManager_->getVoiceById(voiceId);
+            const float fillValue = voice ? std::abs(voice->getExtendedCCValues().keydelta) : 0.0f;
+            sfz::fill(buffer, quantize(fillValue));
+            canShortcut = true;
+            break;
+        }
     case ExtendedCCs::pitchBend: // fallthrough
     case ExtendedCCs::channelAftertouch: {
             const EventVector& events = ms.getCCEvents(p.cc);

tests/MidiStateT.cpp

@@ -223,4 +223,54 @@ TEST_CASE("[CC] Extended CCs on offset and delay")
         };
         REQUIRE(messageList == expected);
     }
+
+    SECTION("CC140 - Keydelta")
+    {
+        synth.loadSfzString(fs::current_path() / "tests/TestFiles/extended_ccs.sfz", R"(
+            <region> delay=2 offset=200 delay_cc140=1 offset_cc140=100 sample=kick.wav
+        )");
+        synth.hdNoteOn(0, 60, 1.0f);
+        synth.hdNoteOn(0, 61, 1.0f);
+        synth.hdNoteOn(0, 59, 1.0f);
+        synth.dispatchMessage(client, 0, "/voice0/remaining_delay", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice1/remaining_delay", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice2/remaining_delay", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice0/source_position", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice1/source_position", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice2/source_position", "", nullptr);
+        std::vector<std::string> expected {
+            "/voice0/remaining_delay,i : { 96000 }",
+            "/voice1/remaining_delay,i : { 144000 }",
+            "/voice2/remaining_delay,i : { 0 }",
+            "/voice0/source_position,i : { 200 }",
+            "/voice1/source_position,i : { 300 }",
+            "/voice2/source_position,i : { 0 }",
+        };
+        REQUIRE(messageList == expected);
+    }
+
+    SECTION("CC141 - Absolute Keydelta")
+    {
+        synth.loadSfzString(fs::current_path() / "tests/TestFiles/extended_ccs.sfz", R"(
+            <region> delay=2 offset=200 delay_cc141=1 offset_cc141=100 sample=kick.wav
+        )");
+        synth.hdNoteOn(0, 60, 1.0f);
+        synth.hdNoteOn(0, 61, 1.0f);
+        synth.hdNoteOn(0, 59, 1.0f);
+        synth.dispatchMessage(client, 0, "/voice0/remaining_delay", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice1/remaining_delay", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice2/remaining_delay", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice0/source_position", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice1/source_position", "", nullptr);
+        synth.dispatchMessage(client, 0, "/voice2/source_position", "", nullptr);
+        std::vector<std::string> expected {
+            "/voice0/remaining_delay,i : { 96000 }",
+            "/voice1/remaining_delay,i : { 144000 }",
+            "/voice2/remaining_delay,i : { 192000 }",
+            "/voice0/source_position,i : { 200 }",
+            "/voice1/source_position,i : { 300 }",
+            "/voice2/source_position,i : { 400 }",
+        };
+        REQUIRE(messageList == expected);
+    }
 }