Don't assume a single <global> for region sets

src/sfizz/Opcode.h

@@ -43,7 +43,7 @@ enum OpcodeCategory {
  */
 enum OpcodeScope {
     //! unknown scope or other
-    kOpcodeScopeGeneric,
+    kOpcodeScopeGeneric = 0,
     //! global scope
     kOpcodeScopeGlobal,
     //! control scope

src/sfizz/RegionSet.h

@@ -8,6 +8,7 @@
 
 #include "Region.h"
 #include "Voice.h"
+#include "Opcode.h"
 #include "SwapAndPop.h"
 #include <vector>
 
@@ -16,6 +17,13 @@ namespace sfz
 
 class RegionSet {
 public:
+    RegionSet() = delete;
+    RegionSet(RegionSet* parentSet, OpcodeScope level)
+    : parent(parentSet), level(level)
+    {
+        if (parentSet != nullptr)
+            parentSet->addSubset(this);
+    }
     /**
      * @brief Set the polyphony limit for the set
      *
@@ -73,6 +81,13 @@ public:
      * @return RegionSet*
      */
     RegionSet* getParent() const noexcept { return parent; }
+
+    /**
+     * @brief Get the set level
+     *
+     * @return OpcodeScope
+     */
+    OpcodeScope getLevel() const noexcept { return level; }
     /**
      * @brief Set the parent set
      *
@@ -109,6 +124,7 @@ public:
     const std::vector<RegionSet*>& getSubsets() const noexcept { return subsets; }
 private:
     RegionSet* parent { nullptr };
+    OpcodeScope level { kOpcodeScopeGeneric };
     std::vector<Region*> regions;
     std::vector<RegionSet*> subsets;
     std::vector<Voice*> voices;

src/sfizz/Synth.cpp

@@ -77,20 +77,19 @@ void sfz::Synth::onVoiceStateChanged(NumericId<Voice> id, Voice::State state)
 
 void sfz::Synth::onParseFullBlock(const std::string& header, const std::vector<Opcode>& members)
 {
-    const auto newRegionSet = [&](RegionSet* parentSet) {
+    const auto newRegionSet = [&](OpcodeScope level) {
-        ASSERT(parentSet != nullptr);
+        auto parent = currentSet;
-        sets.emplace_back(new RegionSet);
+        while (parent && parent->getLevel() >= level)
-        auto newSet = sets.back().get();
+            parent = parent->getParent();
-        parentSet->addSubset(newSet);
+
-        newSet->setParent(parentSet);
+        sets.emplace_back(new RegionSet(parent, level));
-        currentSet = newSet;
+        currentSet = sets.back().get();
     };
 
     switch (hash(header)) {
     case hash("global"):
         globalOpcodes = members;
-        currentSet = sets.front().get();
+        newRegionSet(OpcodeScope::kOpcodeScopeGlobal);
-        lastHeader = OpcodeScope::kOpcodeScopeGlobal;
         groupOpcodes.clear();
         masterOpcodes.clear();
         handleGlobalOpcodes(members);
@@ -101,19 +100,14 @@ void sfz::Synth::onParseFullBlock(const std::string& header, const std::vector<O
         break;
     case hash("master"):
         masterOpcodes = members;
-        newRegionSet(sets.front().get());
+        newRegionSet(OpcodeScope::kOpcodeScopeMaster);
         groupOpcodes.clear();
-        lastHeader = OpcodeScope::kOpcodeScopeMaster;
         handleMasterOpcodes(members);
         numMasters++;
         break;
     case hash("group"):
         groupOpcodes = members;
-        if (lastHeader == OpcodeScope::kOpcodeScopeGroup)
+        newRegionSet(OpcodeScope::kOpcodeScopeGroup);
-            newRegionSet(currentSet->getParent());
-        else
-            newRegionSet(currentSet);
-        lastHeader = OpcodeScope::kOpcodeScopeGroup;
         handleGroupOpcodes(members, masterOpcodes);
         numGroups++;
         break;
@@ -145,8 +139,6 @@ void sfz::Synth::onParseWarning(const SourceRange& range, const std::string& mes
 
 void sfz::Synth::buildRegion(const std::vector<Opcode>& regionOpcodes)
 {
-    ASSERT(currentSet != nullptr);
-
     int regionNumber = static_cast<int>(regions.size());
     auto lastRegion = absl::make_unique<Region>(regionNumber, resources.midiState, defaultPath);
 
@@ -184,8 +176,10 @@ void sfz::Synth::buildRegion(const std::vector<Opcode>& regionOpcodes)
     if (lastRegion->group != Default::group && lastRegion->polyphony != config::maxVoices)
         setGroupPolyphony(lastRegion->group, lastRegion->polyphony);
 
-    lastRegion->parent = currentSet;
+    if (currentSet != nullptr) {
-    currentSet->addRegion(lastRegion.get());
+        lastRegion->parent = currentSet;
+        currentSet->addRegion(lastRegion.get());
+    }
 
     // Adapt the size of the delayed releases to avoid allocating later on
     lastRegion->delayedReleases.reserve(lastRegion->keyRange.length());
@@ -204,10 +198,8 @@ void sfz::Synth::clear()
     for (auto& list : ccActivationLists)
         list.clear();
 
-    lastHeader = OpcodeScope::kOpcodeScopeGlobal;
+    currentSet = nullptr;
     sets.clear();
-    sets.emplace_back(new RegionSet);
-    currentSet = sets.front().get();
     regions.clear();
     effectBuses.clear();
     effectBuses.emplace_back(new EffectBus);

src/sfizz/Synth.h

@@ -817,8 +817,7 @@ private:
     std::vector<VoicePtr> voices;
 
     // These are more general "groups" than sfz and encapsulates the full hierarchy
-    RegionSet* currentSet;
+    RegionSet* currentSet { nullptr };
-    OpcodeScope lastHeader { OpcodeScope::kOpcodeScopeGlobal };
     std::vector<RegionSetPtr> sets;
 
     // These are the `group=` groups where you can off voices

tests/PolyphonyT.cpp

@@ -33,13 +33,13 @@ TEST_CASE("[Polyphony] Polyphony in hierarchy")
         <region> key=64 sample=*sine
     )");
     REQUIRE( synth.getRegionView(0)->polyphony == 2 );
-    REQUIRE( synth.getRegionSetView(1)->getPolyphonyLimit() == 2 );
+    REQUIRE( synth.getRegionSetView(0)->getPolyphonyLimit() == 2 );
     REQUIRE( synth.getRegionView(1)->polyphony == 2 );
-    REQUIRE( synth.getRegionSetView(2)->getPolyphonyLimit() == 3 );
+    REQUIRE( synth.getRegionSetView(1)->getPolyphonyLimit() == 3 );
-    REQUIRE( synth.getRegionSetView(2)->getRegions()[0]->polyphony == 3 );
+    REQUIRE( synth.getRegionSetView(1)->getRegions()[0]->polyphony == 3 );
-    REQUIRE( synth.getRegionSetView(3)->getPolyphonyLimit() == 4 );
+    REQUIRE( synth.getRegionSetView(2)->getPolyphonyLimit() == 4 );
-    REQUIRE( synth.getRegionSetView(3)->getRegions()[0]->polyphony == 5 );
+    REQUIRE( synth.getRegionSetView(2)->getRegions()[0]->polyphony == 5 );
-    REQUIRE( synth.getRegionSetView(3)->getRegions()[1]->polyphony == 4 );
+    REQUIRE( synth.getRegionSetView(2)->getRegions()[1]->polyphony == 4 );
 }
 
 TEST_CASE("[Polyphony] Polyphony groups")