Update to v106r50 release.

byuu says:

Changelog:

  - emulator/video,audio: various cleanups
  - emulator/audio: removed reverb effect (it breaks very badly on
    high-frequency systems)
  - emulator/audio: the Nyquist anti-aliasing lowpass filter is now
    generated automatically instead of set per-core
      - at 44.1KHz output, it's set to 22KHz; at 48KHz, it's set to
        22KHz; at 96KHz, it's set to 25KHz
      - this filter now takes the bsnes emulation speed setting into
        account
  - all system/video.cpp files removed; inlined in System::power() and
    Interface::set() instead
  - sfc/cpu: pre-compute `HTIME` as `HTIME+1<<2` for faster comparisons of
    HIRQs
  - sfc/cpu: re-add check to block IRQs on the last dot of each frame
    (minor speed hit)
  - hiro/gtk3: fixed headers for Linux compilation finally
  - hiro/gtk,qt: fixed settings.cpp logic so initial values are used
    when no settings.bml file exists
  - hiro/gtk: started a minor experiment to specify theming information
    in settings.bml files
  - nall/dsp: allow the precision type (double) to be overridden (to
    float)
  - nall: add some helpers for generating pre-compiled headers
      - it was a failure to try using them for higan, however ...
  - nall: add some helpers for reading fallback values from empty
    `Markup::Node[search]` statements

Todo:

  - CRITICAL: a lot of my IRQ/NMI/HDMA timing tests are failing with the
    fast PPU ... need to figure out why
  - space between Emulator::video functions and Emulator::audio
    functions in gb/system/system.cpp
  - remove Audio/Reverb/Enable from settings.bml in target-bsnes

higan/GNUmakefile

@@ -47,5 +47,5 @@ include $(ui)/GNUmakefile
 -include obj/*.d
 
 clean:
-	$(call delete,out/*)
 	$(call delete,obj/*)
+	$(call delete,out/*)

higan/audio/audio.cpp

@@ -5,30 +5,14 @@ namespace Emulator {
 #include "stream.cpp"
 Audio audio;
 
-auto Audio::reset(maybe<uint> channels_, maybe<double> frequency_) -> void {
-  interface = nullptr;
-
-  if(channels_) channels = channels_();
-  if(frequency_) frequency = frequency_();
-
-  streams.reset();
-  reverb.reset();
-
-  reverb.resize(channels);
-  for(auto c : range(channels)) {
-    reverb[c].resize(7);
-    reverb[c][0].resize(1229);
-    reverb[c][1].resize(1559);
-    reverb[c][2].resize(1907);
-    reverb[c][3].resize(4057);
-    reverb[c][4].resize(8117);
-    reverb[c][5].resize(8311);
-    reverb[c][6].resize(9931);
-  }
+Audio::~Audio() {
+  reset(nullptr);
 }
 
-auto Audio::setInterface(Interface* interface) -> void {
+auto Audio::reset(Interface* interface) -> void {
   this->interface = interface;
+  streams.reset();
+  channels = 0;
 }
 
 auto Audio::setFrequency(double frequency) -> void {
@@ -46,11 +30,8 @@ auto Audio::setBalance(double balance) -> void {
   this->balance = balance;
 }
 
-auto Audio::setReverb(bool enabled) -> void {
-  this->reverbEnable = enabled;
-}
-
 auto Audio::createStream(uint channels, double frequency) -> shared_pointer<Stream> {
+  this->channels = max(this->channels, channels);
   shared_pointer<Stream> stream = new Stream;
   stream->reset(channels, frequency, this->frequency);
   streams.append(stream);
@@ -67,7 +48,7 @@ auto Audio::process() -> void {
     for(auto& sample : samples) sample = 0.0;
 
     for(auto& stream : streams) {
-      double buffer[16];
+      double buffer[channels];
       uint length = stream->read(buffer), offset = 0;
 
       for(auto& sample : samples) {
@@ -78,13 +59,6 @@ auto Audio::process() -> void {
 
     for(auto c : range(channels)) {
       samples[c] = max(-1.0, min(+1.0, samples[c] * volume));
-
-      if(reverbEnable) {
-        samples[c] *= 0.125;
-        for(auto n : range(7)) samples[c] += 0.125 * reverb[c][n].last();
-        for(auto n : range(7)) reverb[c][n].write(samples[c]);
-        samples[c] *= 8.000;
-      }
     }
 
     if(channels == 2) {

higan/audio/audio.hpp

@@ -12,13 +12,12 @@ struct Filter;
 struct Stream;
 
 struct Audio {
-  auto reset(maybe<uint> channels = nothing, maybe<double> frequency = nothing) -> void;
-  auto setInterface(Interface* interface) -> void;
+  ~Audio();
+  auto reset(Interface* interface) -> void;
 
   auto setFrequency(double frequency) -> void;
   auto setVolume(double volume) -> void;
   auto setBalance(double balance) -> void;
-  auto setReverb(bool enabled) -> void;
 
   auto createStream(uint channels, double frequency) -> shared_pointer<Stream>;
 
@@ -29,14 +28,11 @@ private:
   vector<shared_pointer<Stream>> streams;
 
   uint channels = 0;
-  double frequency = 0.0;
+  double frequency = 48000.0;
 
   double volume = 1.0;
   double balance = 0.0;
 
-  bool reverbEnable = false;
-  vector<vector<queue<double>>> reverb;
-
   friend class Stream;
 };
 
@@ -68,6 +64,7 @@ struct Stream {
 private:
   struct Channel {
     vector<Filter> filters;
+    vector<DSP::IIR::Biquad> nyquist;
     DSP::Resampler::Cubic resampler;
   };
   vector<Channel> channels;

higan/audio/stream.cpp

@@ -16,13 +16,28 @@ auto Stream::setFrequency(double inputFrequency, maybe<double> outputFrequency)
   if(outputFrequency) this->outputFrequency = outputFrequency();
 
   for(auto& channel : channels) {
+    channel.nyquist.reset();
     channel.resampler.reset(this->inputFrequency, this->outputFrequency);
   }
+
+  if(this->inputFrequency >= this->outputFrequency * 2) {
+    //add a low-pass filter to prevent aliasing during resampling
+    double cutoffFrequency = min(25000.0, this->outputFrequency / 2.0 - 2000.0);
+    for(auto& channel : channels) {
+      uint passes = 3;
+      for(uint pass : range(passes)) {
+        DSP::IIR::Biquad filter;
+        double q = DSP::IIR::Biquad::butterworth(passes * 2, pass);
+        filter.reset(DSP::IIR::Biquad::Type::LowPass, cutoffFrequency, this->inputFrequency, q);
+        channel.nyquist.append(filter);
+      }
+    }
+  }
 }
 
 auto Stream::addFilter(Filter::Order order, Filter::Type type, double cutoffFrequency, uint passes) -> void {
   for(auto& channel : channels) {
-    for(auto pass : range(passes)) {
+    for(uint pass : range(passes)) {
       Filter filter{order};
 
       if(order == Filter::Order::First) {
@@ -63,6 +78,9 @@ auto Stream::write(const double samples[]) -> void {
       case Filter::Order::Second: sample = filter.biquad.process(sample); break;
       }
     }
+    for(auto& filter : channels[c].nyquist) {
+      sample = filter.process(sample);
+    }
     channels[c].resampler.write(sample);
   }
 

higan/emulator/emulator.hpp

@@ -13,7 +13,7 @@ using namespace nall;
 
 namespace Emulator {
   static const string Name    = "higan";
-  static const string Version = "106.49";
+  static const string Version = "106.50";
   static const string Author  = "byuu";
   static const string License = "GPLv3";
   static const string Website = "https://byuu.org/";

higan/fc/apu/apu.cpp

@@ -77,7 +77,6 @@ auto APU::power(bool reset) -> void {
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 90.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 440.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::LowPass, 14000.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   pulse[0].power();
   pulse[1].power();

higan/fc/interface/interface.cpp

@@ -177,7 +177,7 @@ auto Interface::get(const string& name) -> any {
 auto Interface::set(const string& name, const any& value) -> bool {
   if(name == "Color Emulation" && value.is<bool>()) {
     settings.colorEmulation = value.get<bool>();
-    system.configureVideoPalette();
+    Emulator::video.setPalette();
     return true;
   }
   if(name == "Scanline Emulation" && value.is<bool>()) return settings.scanlineEmulation = value.get<bool>(), true;

higan/fc/system/system.cpp

@@ -2,7 +2,6 @@
 
 namespace Famicom {
 
-#include "video.cpp"
 #include "serialization.cpp"
 System system;
 Scheduler scheduler;
@@ -63,13 +62,10 @@ auto System::unload() -> void {
 }
 
 auto System::power(bool reset) -> void {
-  Emulator::video.reset();
-  Emulator::video.setInterface(interface);
-  configureVideoPalette();
-  configureVideoEffects();
+  Emulator::video.reset(interface);
+  Emulator::video.setPalette();
 
-  Emulator::audio.reset();
-  Emulator::audio.setInterface(interface);
+  Emulator::audio.reset(interface);
 
   scheduler.reset();
   cartridge.power();

higan/fc/system/system.hpp

@@ -16,10 +16,6 @@ struct System {
   auto init() -> void;
   auto term() -> void;
 
-  //video.cpp
-  auto configureVideoPalette() -> void;
-  auto configureVideoEffects() -> void;
-
   //serialization.cpp
   auto serialize() -> serializer;
   auto unserialize(serializer&) -> bool;

higan/fc/system/video.cpp

@@ -1,6 +0,0 @@
-auto System::configureVideoPalette() -> void {
-  Emulator::video.setPalette();
-}
-
-auto System::configureVideoEffects() -> void {
-}

higan/gb/apu/apu.cpp

@@ -56,7 +56,6 @@ auto APU::power() -> void {
   if(!Model::SuperGameBoy()) {
     stream = Emulator::audio.createStream(2, frequency());
     stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
-    stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
   }
   for(uint n = 0xff10; n <= 0xff3f; n++) bus.mmio[n] = this;
 

higan/gb/interface/interface.cpp

@@ -100,13 +100,15 @@ auto Interface::get(const string& name) -> any {
 auto Interface::set(const string& name, const any& value) -> bool {
   if(name == "Blur Emulation" && value.is<bool>()) {
     settings.blurEmulation = value.get<bool>();
-    system.configureVideoEffects();
+    if(Model::SuperGameBoy()) return true;
+    Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
     return true;
   }
 
   if(name == "Color Emulation" && value.is<bool>()) {
     settings.colorEmulation = value.get<bool>();
-    system.configureVideoPalette();
+    if(Model::SuperGameBoy()) return true;
+    Emulator::video.setPalette();
     return true;
   }
 

higan/gb/system/system.cpp

@@ -2,7 +2,6 @@
 
 namespace GameBoy {
 
-#include "video.cpp"
 #include "serialization.cpp"
 System system;
 Scheduler scheduler;
@@ -83,13 +82,10 @@ auto System::unload() -> void {
 
 auto System::power() -> void {
   if(model() != Model::SuperGameBoy) {
-    Emulator::video.reset();
-    Emulator::video.setInterface(interface);
-    configureVideoPalette();
-    configureVideoEffects();
-
-    Emulator::audio.reset();
-    Emulator::audio.setInterface(interface);
+    Emulator::video.reset(interface);
+    Emulator::video.setPalette();
+    Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
+    Emulator::audio.reset(interface);
   }
 
   scheduler.reset();

higan/gb/system/video.cpp

@@ -1,9 +0,0 @@
-auto System::configureVideoPalette() -> void {
-  if(model() == Model::SuperGameBoy) return;
-  Emulator::video.setPalette();
-}
-
-auto System::configureVideoEffects() -> void {
-  if(model() == Model::SuperGameBoy) return;
-  Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
-}

higan/gba/apu/apu.cpp

@@ -78,7 +78,6 @@ auto APU::power() -> void {
   create(APU::Enter, system.frequency());
   stream = Emulator::audio.createStream(2, frequency() / 64.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   clock = 0;
   square1.power();

higan/gba/interface/interface.cpp

@@ -131,19 +131,19 @@ auto Interface::get(const string& name) -> any {
 auto Interface::set(const string& name, const any& value) -> bool {
   if(name == "Blur Emulation" && value.is<bool>()) {
     settings.blurEmulation = value.get<bool>();
-    system.configureVideoEffects();
+    Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
     return true;
   }
 
   if(name == "Color Emulation" && value.is<bool>()) {
     settings.colorEmulation = value.get<bool>();
-    system.configureVideoPalette();
+    Emulator::video.setPalette();
     return true;
   }
 
   if(name == "Rotate Display" && value.is<bool>()) {
     settings.rotateLeft = value.get<bool>();
-    system.configureVideoEffects();
+    Emulator::video.setEffect(Emulator::Video::Effect::RotateLeft, settings.rotateLeft);
     return true;
   }
 

higan/gba/system/system.cpp

@@ -5,7 +5,6 @@ namespace GameBoyAdvance {
 System system;
 Scheduler scheduler;
 #include "bios.cpp"
-#include "video.cpp"
 #include "serialization.cpp"
 
 auto System::init() -> void {
@@ -15,13 +14,12 @@ auto System::term() -> void {
 }
 
 auto System::power() -> void {
-  Emulator::video.reset();
-  Emulator::video.setInterface(interface);
-  configureVideoPalette();
-  configureVideoEffects();
+  Emulator::video.reset(interface);
+  Emulator::video.setPalette();
+  Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
+  Emulator::video.setEffect(Emulator::Video::Effect::RotateLeft, settings.rotateLeft);
 
-  Emulator::audio.reset();
-  Emulator::audio.setInterface(interface);
+  Emulator::audio.reset(interface);
 
   scheduler.reset();
   bus.power();

higan/gba/system/system.hpp

@@ -27,10 +27,6 @@ struct System {
   auto run() -> void;
   auto runToSave() -> void;
 
-  //video.cpp
-  auto configureVideoPalette() -> void;
-  auto configureVideoEffects() -> void;
-
   //serialization.cpp
   auto serialize() -> serializer;
   auto unserialize(serializer&) -> bool;

higan/gba/system/video.cpp

@@ -1,8 +0,0 @@
-auto System::configureVideoPalette() -> void {
-  Emulator::video.setPalette();
-}
-
-auto System::configureVideoEffects() -> void {
-  Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
-  Emulator::video.setEffect(Emulator::Video::Effect::RotateLeft, settings.rotateLeft);
-}

higan/md/psg/psg.cpp

@@ -39,7 +39,6 @@ auto PSG::power(bool reset) -> void {
   stream = Emulator::audio.createStream(1, frequency() / 16.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::LowPass, 2840.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   select = 0;
   for(auto n : range(15)) {

higan/md/system/system.cpp

@@ -62,12 +62,10 @@ auto System::unload() -> void {
 }
 
 auto System::power(bool reset) -> void {
-  Emulator::video.reset();
-  Emulator::video.setInterface(interface);
+  Emulator::video.reset(interface);
   Emulator::video.setPalette();
 
-  Emulator::audio.reset();
-  Emulator::audio.setInterface(interface);
+  Emulator::audio.reset(interface);
 
   scheduler.reset();
   cartridge.power();

higan/md/ym2612/ym2612.cpp

@@ -159,7 +159,6 @@ auto YM2612::power(bool reset) -> void {
   stream = Emulator::audio.createStream(2, frequency() / 144.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::LowPass, 2840.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   io = {};
   lfo = {};

higan/ms/psg/psg.cpp

@@ -45,7 +45,6 @@ auto PSG::power() -> void {
   create(PSG::Enter, system.colorburst() / 16.0);
   stream = Emulator::audio.createStream(2, frequency());
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   select = 0;
   for(auto n : range(15)) {

higan/ms/system/system.cpp

@@ -59,12 +59,10 @@ auto System::unload() -> void {
 }
 
 auto System::power() -> void {
-  Emulator::video.reset();
-  Emulator::video.setInterface(interface);
+  Emulator::video.reset(interface);
   Emulator::video.setPalette();
 
-  Emulator::audio.reset();
-  Emulator::audio.setInterface(interface);
+  Emulator::audio.reset(interface);
 
   scheduler.reset();
   cartridge.power();

higan/pce/psg/psg.cpp

@@ -53,7 +53,6 @@ auto PSG::power() -> void {
   create(PSG::Enter, system.colorburst());
   stream = Emulator::audio.createStream(2, frequency());
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   io = {};
   for(auto C : range(6)) channel[C].power(C);

higan/pce/system/system.cpp

@@ -49,12 +49,10 @@ auto System::unload() -> void {
 }
 
 auto System::power() -> void {
-  Emulator::video.reset();
-  Emulator::video.setInterface(interface);
+  Emulator::video.reset(interface);
   Emulator::video.setPalette();
 
-  Emulator::audio.reset();
-  Emulator::audio.setInterface(interface);
+  Emulator::audio.reset(interface);
 
   scheduler.reset();
   cartridge.power();

higan/sfc/coprocessor/icd/icd.cpp

@@ -47,7 +47,6 @@ auto ICD::power() -> void {
   create(ICD::Enter, (Frequency ? Frequency : system.cpuFrequency()) / 5.0);
   stream = Emulator::audio.createStream(2, frequency() / 2.0);
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   r6003 = 0x00;
   r6004 = 0xff;
@@ -91,7 +90,7 @@ auto ICD::reset() -> void {
   writeAddress = 0;
 
   packetSize = 0;
-  joypID = 0;
+  joypID = 3;
   joyp15Lock = 0;
   joyp14Lock = 0;
   pulseLock = true;

higan/sfc/cpu/cpu.hpp

@@ -139,8 +139,8 @@ private:
     uint8 wrdivb = 0xff;
 
     //$4207-$420a
-    uint9 hirqPos = 0x1ff;
-    uint9 virqPos = 0x1ff;
+    uint12 htime = 0x1ff + 1 << 2;
+    uint9  vtime = 0x1ff;
 
     //$420d
     uint romSpeed = 8;

higan/sfc/cpu/io.cpp

@@ -174,19 +174,23 @@ auto CPU::writeCPU(uint24 addr, uint8 data) -> void {
     return;
 
   case 0x4207:  //HTIMEL
-    io.hirqPos.bits(0,7) = data;
+    io.htime = (io.htime >> 2) - 1;
+    io.htime.bits(0,7) = data;
+    io.htime = (io.htime + 1) << 2;
     return;
 
   case 0x4208:  //HTIMEH
-    io.hirqPos.bit(8) = data.bit(0);
+    io.htime = (io.htime >> 2) - 1;
+    io.htime.bit(8) = data.bit(0);
+    io.htime = (io.htime + 1) << 2;
     return;
 
   case 0x4209:  //VTIMEL
-    io.virqPos.bits(0,7) = data;
+    io.vtime.bits(0,7) = data;
     return;
 
   case 0x420a:  //VTIMEH
-    io.virqPos.bit(8) = data.bit(0);
+    io.vtime.bit(8) = data.bit(0);
     return;
 
   case 0x420b:  //DMAEN

higan/sfc/cpu/irq.cpp

@@ -18,8 +18,9 @@ auto CPU::pollInterrupts() -> void {
 
   //IRQ test
   if(status.irqValid.raise(io.irqEnable
-  && (!io.virqEnable || vcounter(10) == io.virqPos)
-  && (!io.hirqEnable || hcounter(10) == io.hirqPos + 1 << 2)
+  && (!io.virqEnable || vcounter(10) == io.vtime)
+  && (!io.hirqEnable || hcounter(10) == io.htime)
+  && (vcounter(6) || hcounter(6))  //IRQs cannot trigger on last dot of fields
   )) status.irqLine = status.irqHold = true;  //hold /IRQ for four cycles
 }
 

higan/sfc/cpu/serialization.cpp

@@ -65,8 +65,8 @@ auto CPU::serialize(serializer& s) -> void {
   s.integer(io.wrdiva);
   s.integer(io.wrdivb);
 
-  s.integer(io.hirqPos);
-  s.integer(io.virqPos);
+  s.integer(io.htime);
+  s.integer(io.vtime);
 
   s.integer(io.romSpeed);
 

higan/sfc/system/system.cpp

@@ -91,12 +91,10 @@ auto System::power(bool reset) -> void {
   hacks.fastPPU = settings.fastPPU;
   hacks.fastDSP = settings.fastDSP;
 
-  Emulator::video.reset();
-  Emulator::video.setInterface(interface);
+  Emulator::video.reset(interface);
   Emulator::video.setPalette();
 
-  Emulator::audio.reset();
-  Emulator::audio.setInterface(interface);
+  Emulator::audio.reset(interface);
 
   random.entropy(Random::Entropy::Low);
 

higan/target-bsnes/program/audio.cpp

@@ -72,7 +72,4 @@ auto Program::updateAudioEffects() -> void {
 
   double balance = max(-1.0, min(+1.0, (settings["Audio/Balance"].integer() - 50) / 50.0));
   Emulator::audio.setBalance(balance);
-
-  bool reverb = settings["Audio/Reverb"].boolean();
-  Emulator::audio.setReverb(reverb);
 }

higan/target-bsnes/program/game.cpp

@@ -4,9 +4,7 @@ auto Program::load() -> void {
   for(auto& media : emulator->media) {
     if(media.type != "sfc") continue;
 
-    Emulator::audio.reset(2, audio->frequency());
     if(emulator->load(media.id)) {
-      gameQueue = {};
       screenshot = {};
       frameAdvance = false;
       if(!verified() && settingsWindow->advanced.warnOnUnverifiedGames.checked()) {
@@ -56,6 +54,8 @@ auto Program::load() -> void {
 
     break;
   }
+
+  gameQueue = {};
 }
 
 auto Program::loadFile(string location) -> vector<uint8_t> {

higan/target-bsnes/settings/audio.cpp

@@ -52,12 +52,6 @@ AudioSettings::AudioSettings(TabFrame* parent) : TabFrameItem(parent) {
     balanceValue.setText(value);
     program->updateAudioEffects();
   }).doChange();
-  reverb.setText("Reverb").setChecked(settings["Audio/Reverb"].boolean()).onToggle([&] {
-    settings["Audio/Reverb"].setValue(reverb.checked());
-    program->updateAudioEffects();
-  });
-  //todo: does not work properly with Super Game Boy
-  reverb.setVisible(false);
 }
 
 auto AudioSettings::updateDevice() -> void {

higan/target-bsnes/settings/settings.hpp

@@ -55,7 +55,6 @@ public:
       Label balanceLabel{&effectsLayout, Size{0, 0}};
       Label balanceValue{&effectsLayout, Size{50, 0}};
       HorizontalSlider balanceSlider{&effectsLayout, Size{~0, 0}};
-    CheckLabel reverb{&layout, Size{~0, 0}};
 };
 
 struct InputSettings : TabFrameItem {

higan/target-higan/program/medium.cpp

@@ -19,17 +19,16 @@ auto Program::loadMedium(Emulator::Interface& interface, const Emulator::Interfa
 
   mediumPaths.append(locate({"systems/", medium.name, ".sys/"}));
 
-  Emulator::audio.reset(2, audio->frequency());
   inputManager->bind(emulator = &interface);
   if(!emulator->load(medium.id)) {
     emulator = nullptr;
     mediumPaths.reset();
     return;
   }
-  updateAudioDriver();
-  updateAudioEffects();
   connectDevices();
   emulator->power();
+  updateAudioDriver();
+  updateAudioEffects();
 
   presentation->resizeViewport();
   presentation->setTitle(emulator->title());

higan/target-higan/program/utility.cpp

@@ -171,9 +171,6 @@ auto Program::updateAudioEffects() -> void {
 
   auto balance = max(-1.0, min(1.0, (settings["Audio/Balance"].integer() - 50) / 50.0));
   Emulator::audio.setBalance(balance);
-
-  auto reverbEnable = settings["Audio/Reverb/Enable"].boolean();
-  Emulator::audio.setReverb(reverbEnable);
 }
 
 auto Program::focused() -> bool {

higan/target-higan/settings/audio.cpp

@@ -48,8 +48,6 @@ AudioSettings::AudioSettings(TabFrame* parent) : TabFrameItem(parent) {
   balanceValue.setAlignment(0.5);
   balanceSlider.setLength(101).setPosition(settings["Audio/Balance"].natural()).onChange([&] { updateEffects(); });
 
-  reverbEnable.setText("Reverb").setChecked(settings["Audio/Reverb/Enable"].boolean()).onToggle([&] { updateEffects(); });
-
   updateDevice();
   updateEffects(true);
 }
@@ -79,7 +77,5 @@ auto AudioSettings::updateEffects(bool initializing) -> void {
   settings["Audio/Balance"].setValue(balanceSlider.position());
   balanceValue.setText({balanceSlider.position(), "%"});
 
-  settings["Audio/Reverb/Enable"].setValue(reverbEnable.checked());
-
   if(!initializing) program->updateAudioEffects();
 }

higan/target-higan/settings/settings.cpp

@@ -58,7 +58,6 @@ Settings::Settings() {
   set("Audio/Mute", false);
   set("Audio/Volume", 100);
   set("Audio/Balance", 50);
-  set("Audio/Reverb/Enable", false);
 
   set("Input/Driver", ruby::Input::safestDriver());
   set("Input/Frequency", 5);

higan/target-higan/settings/settings.hpp

@@ -109,7 +109,6 @@ struct AudioSettings : TabFrameItem {
       Label balanceLabel{&balanceLayout, Size{80, 0}};
       Label balanceValue{&balanceLayout, Size{50, 0}};
       HorizontalSlider balanceSlider{&balanceLayout, Size{~0, 0}};
-    CheckLabel reverbEnable{&layout, Size{~0, 0}};
 
   auto updateDevice() -> void;
   auto updateEffects(bool initializing = false) -> void;

higan/video/video.cpp

@@ -6,11 +6,12 @@ namespace Emulator {
 Video video;
 
 Video::~Video() {
-  reset();
+  reset(nullptr);
 }
 
-auto Video::reset() -> void {
-  interface = nullptr;
+auto Video::reset(Interface* interface) -> void {
+  this->interface = interface;
+
   sprites.reset();
   delete buffer;
   buffer = nullptr;
@@ -25,10 +26,6 @@ auto Video::reset() -> void {
   effects.rotateLeft = false;
 }
 
-auto Video::setInterface(Interface* interface) -> void {
-  this->interface = interface;
-}
-
 auto Video::setPalette() -> void {
   if(!interface) return;
 

higan/video/video.hpp

@@ -14,9 +14,7 @@ struct Video {
   };
 
   ~Video();
-
-  auto reset() -> void;
-  auto setInterface(Interface* interface) -> void;
+  auto reset(Interface* interface) -> void;
 
   auto setPalette() -> void;
   auto setSaturation(double saturation) -> void;

higan/ws/apu/apu.cpp

@@ -68,7 +68,6 @@ auto APU::power() -> void {
   create(APU::Enter, 3'072'000);
   stream = Emulator::audio.createStream(2, frequency());
   stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
-  stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
 
   bus.map(this, 0x004a, 0x004c);
   bus.map(this, 0x004e, 0x0050);

higan/ws/interface/interface.cpp

@@ -106,19 +106,19 @@ auto Interface::get(const string& name) -> any {
 auto Interface::set(const string& name, const any& value) -> bool {
   if(name == "Blur Emulation" && value.is<bool>()) {
     settings.blurEmulation = value.get<bool>();
-    system.configureVideoEffects();
+    Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
     return true;
   }
 
   if(name == "Color Emulation" && value.is<bool>()) {
     settings.colorEmulation = value.get<bool>();
-    system.configureVideoPalette();
+    Emulator::video.setPalette();
     return true;
   }
 
   if(name == "Rotate Display" && value.is<bool>()) {
     settings.rotateLeft = value.get<bool>();
-    system.configureVideoEffects();
+    Emulator::video.setEffect(Emulator::Video::Effect::RotateLeft, settings.rotateLeft);
     return true;
   }
 

higan/ws/system/system.cpp

@@ -6,7 +6,6 @@ System system;
 Scheduler scheduler;
 Cheat cheat;
 #include "io.cpp"
-#include "video.cpp"
 #include "serialization.cpp"
 
 auto System::init() -> void {
@@ -61,13 +60,12 @@ auto System::unload() -> void {
 }
 
 auto System::power() -> void {
-  Emulator::video.reset();
-  Emulator::video.setInterface(interface);
-  configureVideoPalette();
-  configureVideoEffects();
+  Emulator::video.reset(interface);
+  Emulator::video.setPalette();
+  Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
+  Emulator::video.setEffect(Emulator::Video::Effect::RotateLeft, settings.rotateLeft);
 
-  Emulator::audio.reset();
-  Emulator::audio.setInterface(interface);
+  Emulator::audio.reset(interface);
 
   scheduler.reset();
   bus.power();

higan/ws/system/system.hpp

@@ -22,10 +22,6 @@ struct System : IO {
   auto portRead(uint16 addr) -> uint8 override;
   auto portWrite(uint16 addr, uint8 data) -> void override;
 
-  //video.cpp
-  auto configureVideoPalette() -> void;
-  auto configureVideoEffects() -> void;
-
   //serialization.cpp
   auto serializeInit() -> void;
   auto serialize() -> serializer;

higan/ws/system/video.cpp

@@ -1,8 +0,0 @@
-auto System::configureVideoPalette() -> void {
-  Emulator::video.setPalette();
-}
-
-auto System::configureVideoEffects() -> void {
-  Emulator::video.setEffect(Emulator::Video::Effect::InterframeBlending, settings.blurEmulation);
-  Emulator::video.setEffect(Emulator::Video::Effect::RotateLeft, settings.rotateLeft);
-}

hiro/gtk/header.hpp

@@ -43,9 +43,13 @@
   #include <gdk/gdkkeysyms.h>
   #include <gtk/gtk.h>
   #if defined(Hiro_SourceEdit)
-    #include <gtksourceview/gtksourceview.h>
-    #include <gtksourceview/gtksourcelanguagemanager.h>
-    #include <gtksourceview/gtksourcestyleschememanager.h>
+    #if HIRO_GTK==2
+      #include <gtksourceview/gtksourceview.h>
+      #include <gtksourceview/gtksourcelanguagemanager.h>
+      #include <gtksourceview/gtksourcestyleschememanager.h>
+    #elif HIRO_GTK==3
+      #include <gtksourceview/gtksource.h>
+    #endif
   #endif
   #include <nall/xorg/guard.hpp>
 #endif

hiro/gtk/settings.cpp

@@ -8,16 +8,20 @@ Settings::Settings() {
   auto document = BML::unserialize(file::read({path, "gtk3.bml"}));
   #endif
 
-  auto get = [&](string_view name) {
-    return document[name];
-  };
+  #define get(name, type, value) \
+    if(auto node = document[name]) value = node.type()
 
-  geometry.frameX = get("Geometry/FrameX").integer();
-  geometry.frameY = get("Geometry/FrameY").integer();
-  geometry.frameWidth = get("Geometry/FrameWidth").integer();
-  geometry.frameHeight = get("Geometry/FrameHeight").integer();
-  geometry.menuHeight = get("Geometry/MenuHeight").integer();
-  geometry.statusHeight = get("Geometry/StatusHeight").integer();
+  get("Geometry/FrameX", integer, geometry.frameX);
+  get("Geometry/FrameY", integer, geometry.frameY);
+  get("Geometry/FrameWidth", integer, geometry.frameWidth);
+  get("Geometry/FrameHeight", integer, geometry.frameHeight);
+  get("Geometry/MenuHeight", integer, geometry.menuHeight);
+  get("Geometry/StatusHeight", integer, geometry.statusHeight);
+
+  get("Theme/ActionIcons", boolean, theme.actionIcons);
+  get("Theme/WidgetColors", boolean, theme.widgetColors);
+
+  #undef get
 }
 
 Settings::~Settings() {
@@ -25,9 +29,9 @@ Settings::~Settings() {
   directory::create(path, 0755);
 
   Markup::Node document;
-  auto set = [&](string_view name, string_view value) {
-    document(name).setValue(value);
-  };
+
+  #define set(name, value) \
+    document(name).setValue(value)
 
   set("Geometry/FrameX", geometry.frameX);
   set("Geometry/FrameY", geometry.frameY);
@@ -36,6 +40,11 @@ Settings::~Settings() {
   set("Geometry/MenuHeight", geometry.menuHeight);
   set("Geometry/StatusHeight", geometry.statusHeight);
 
+  set("Theme/ActionIcons", theme.actionIcons);
+  set("Theme/WidgetColors", theme.widgetColors);
+
+  #undef set
+
   #if HIRO_GTK==2
   file::write({path, "gtk2.bml"}, BML::serialize(document));
   #elif HIRO_GTK==3

hiro/gtk/settings.hpp

@@ -14,6 +14,11 @@ struct Settings {
     int menuHeight = 8;
     int statusHeight = 4;
   } geometry;
+
+  struct Theme {
+    bool actionIcons = true;
+    bool widgetColors = true;
+  } theme;
 };
 
 static Settings settings;

hiro/gtk/widget/table-view.cpp

@@ -257,14 +257,14 @@ auto pTableView::_doDataFunc(GtkTreeViewColumn* gtkColumn, GtkCellRenderer* rend
               pango_font_description_free(font);
               if(auto color = cell->foregroundColor(true)) {
                 auto gdkColor = CreateColor(color);
-                g_object_set(G_OBJECT(renderer), "foreground-gdk", &gdkColor, nullptr);
+                if(settings.theme.widgetColors) g_object_set(G_OBJECT(renderer), "foreground-gdk", &gdkColor, nullptr);
               } else {
                 g_object_set(G_OBJECT(renderer), "foreground-set", false, nullptr);
               }
             }
             if(auto color = cell->backgroundColor(true)) {
               auto gdkColor = CreateColor(color);
-              g_object_set(G_OBJECT(renderer), "cell-background-gdk", &gdkColor, nullptr);
+              if(settings.theme.widgetColors) g_object_set(G_OBJECT(renderer), "cell-background-gdk", &gdkColor, nullptr);
             } else {
               g_object_set(G_OBJECT(renderer), "cell-background-set", false, nullptr);
             }

hiro/qt/settings.cpp

@@ -8,16 +8,17 @@ Settings::Settings() {
   auto document = BML::unserialize(file::read({path, "qt5.bml"}));
   #endif
 
-  auto get = [&](string_view name) {
-    return document[name];
-  };
+  #define get(name, type, value) \
+    if(auto node = document[name]) value = node.type()
 
-  geometry.frameX = get("Geometry/FrameX").integer();
-  geometry.frameY = get("Geometry/FrameY").integer();
-  geometry.frameWidth = get("Geometry/FrameWidth").integer();
-  geometry.frameHeight = get("Geometry/FrameHeight").integer();
-  geometry.menuHeight = get("Geometry/MenuHeight").integer();
-  geometry.statusHeight = get("Geometry/StatusHeight").integer();
+  get("Geometry/FrameX", integer, geometry.frameX);
+  get("Geometry/FrameY", integer, geometry.frameY);
+  get("Geometry/FrameWidth", integer, geometry.frameWidth);
+  get("Geometry/FrameHeight", integer, geometry.frameHeight);
+  get("Geometry/MenuHeight", integer, geometry.menuHeight);
+  get("Geometry/StatusHeight", integer, geometry.statusHeight);
+
+  #undef get
 }
 
 Settings::~Settings() {
@@ -25,9 +26,9 @@ Settings::~Settings() {
   directory::create(path, 0755);
 
   Markup::Node document;
-  auto set = [&](string_view name, string_view value) {
-    document(name).setValue(value);
-  };
+
+  #define set(name, value) \
+    document(name).setValue(value)
 
   set("Geometry/FrameX", geometry.frameX);
   set("Geometry/FrameY", geometry.frameY);
@@ -36,6 +37,8 @@ Settings::~Settings() {
   set("Geometry/MenuHeight", geometry.menuHeight);
   set("Geometry/StatusHeight", geometry.statusHeight);
 
+  #undef set
+
   #if HIRO_QT==4
   file::write({path, "qt4.bml"}, BML::serialize(document));
   #elif HIRO_QT==5

hiro/qt/window.cpp

@@ -164,7 +164,6 @@ auto pWindow::setMaximumSize(Size size) -> void {
   static auto maximumSize = qtWindow->maximumSize();
 
   if(size) {
-    //once this is called, no matter what the size is, Qt will no longer allow the window to be maximized
     qtWindow->setMaximumSize(size.width(), size.height() + _menuHeight() + _statusHeight());
   } else {
     qtWindow->setMaximumSize(maximumSize);

nall/GNUmakefile

@@ -40,7 +40,9 @@ ifeq ($(platform),)
 endif
 
 flags.c      = -x c -std=c11
+flags.h      = -x c-header -std=c11
 flags.cpp    = -x c++ -std=c++14
+flags.hpp    = -x c++-header -std=c++14
 flags.objc   = -x objective-c -std=c11
 flags.objcpp = -x objective-c++ -std=c++14
 flags.deps   = -MMD -MP -MF $(@:.o=.d)
@@ -50,6 +52,7 @@ ifeq ($(compiler),)
   ifeq ($(platform),windows)
     compiler := g++
     flags.cpp := -x c++ -std=gnu++14
+    flags.hpp := -x c++-header -std=gnu++14
   else ifeq ($(platform),macos)
     compiler := clang++
   else ifeq ($(platform),linux)
@@ -133,7 +136,10 @@ endif
 
 # paths
 prefix := $(HOME)/.local
-object.path := obj
+
+ifeq ($(object.path),)
+  object.path := obj
+endif
 
 # rules
 default: all;
@@ -155,7 +161,11 @@ compile = \
       $(compiler) $(flags.c)   $(flags.deps) $(flags) $1 -c $< -o $@ \
    ,$(if $(filter %.cpp,$<), \
       $(compiler) $(flags.cpp) $(flags.deps) $(flags) $1 -c $< -o $@ \
-    )) \
+   ,$(if $(filter %.h,$<), \
+      $(compiler) $(flags.h)   $(flags) $1 -c $< -o $@ \
+   ,$(if $(filter %.hpp,$<), \
+      $(compiler) $(flags.hpp) $(flags) $1 -c $< -o $@ \
+    )))) \
   )
 
 # function rwildcard(directory, pattern)

nall/dsp/dsp.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+namespace nall { namespace DSP {
+
+#if defined(NALL_DSP_PRECISION)
+using real = NALL_DSP_PRECISION;
+#else
+using real = double;
+#endif
+
+}}

nall/dsp/iir/biquad.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <nall/dsp/dsp.hpp>
+
 //transposed direct form II biquadratic second-order IIR filter
 
 namespace nall { namespace DSP { namespace IIR {
@@ -15,22 +17,22 @@ struct Biquad {
     HighShelf,
   };
 
-  inline auto reset(Type type, double cutoffFrequency, double samplingFrequency, double quality, double gain = 0.0) -> void;
-  inline auto process(double in) -> double;  //normalized sample (-1.0 to +1.0)
+  inline auto reset(Type type, real cutoffFrequency, real samplingFrequency, real quality, real gain = 0.0) -> void;
+  inline auto process(real in) -> real;  //normalized sample (-1.0 to +1.0)
 
-  inline static auto butterworth(uint order, uint phase) -> double;
+  inline static auto butterworth(uint order, uint phase) -> real;
 
 private:
   Type type;
-  double cutoffFrequency;
-  double samplingFrequency;
-  double quality;             //frequency response quality
-  double gain;                //peak gain
-  double a0, a1, a2, b1, b2;  //coefficients
-  double z1, z2;              //second-order IIR
+  real cutoffFrequency;
+  real samplingFrequency;
+  real quality;             //frequency response quality
+  real gain;                //peak gain
+  real a0, a1, a2, b1, b2;  //coefficients
+  real z1, z2;              //second-order IIR
 };
 
-auto Biquad::reset(Type type, double cutoffFrequency, double samplingFrequency, double quality, double gain) -> void {
+auto Biquad::reset(Type type, real cutoffFrequency, real samplingFrequency, real quality, real gain) -> void {
   this->type = type;
   this->cutoffFrequency = cutoffFrequency;
   this->samplingFrequency = samplingFrequency;
@@ -40,10 +42,10 @@ auto Biquad::reset(Type type, double cutoffFrequency, double samplingFrequency,
   z1 = 0.0;
   z2 = 0.0;
 
-  double v = pow(10, fabs(gain) / 20.0);
-  double k = tan(Math::Pi * cutoffFrequency / samplingFrequency);
-  double q = quality;
-  double n = 0.0;
+  real v = pow(10, fabs(gain) / 20.0);
+  real k = tan(Math::Pi * cutoffFrequency / samplingFrequency);
+  real q = quality;
+  real n = 0.0;
 
   switch(type) {
 
@@ -140,15 +142,15 @@ auto Biquad::reset(Type type, double cutoffFrequency, double samplingFrequency,
   }
 }
 
-auto Biquad::process(double in) -> double {
-  double out = in * a0 + z1;
+auto Biquad::process(real in) -> real {
+  real out = in * a0 + z1;
   z1 = in * a1 + z2 - b1 * out;
   z2 = in * a2 - b2 * out;
   return out;
 }
 
 //compute Q values for N-order butterworth filtering
-auto Biquad::butterworth(uint order, uint phase) -> double {
+auto Biquad::butterworth(uint order, uint phase) -> real {
   return -0.5 / cos(Math::Pi * (phase + order + 0.5) / order);
 }
 

nall/dsp/iir/one-pole.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <nall/dsp/dsp.hpp>
+
 //one-pole first-order IIR filter
 
 namespace nall { namespace DSP { namespace IIR {
@@ -10,24 +12,24 @@ struct OnePole {
     HighPass,
   };
 
-  inline auto reset(Type type, double cutoffFrequency, double samplingFrequency) -> void;
-  inline auto process(double in) -> double;  //normalized sample (-1.0 to +1.0)
+  inline auto reset(Type type, real cutoffFrequency, real samplingFrequency) -> void;
+  inline auto process(real in) -> real;  //normalized sample (-1.0 to +1.0)
 
 private:
   Type type;
-  double cutoffFrequency;
-  double samplingFrequency;
-  double a0, b1;  //coefficients
-  double z1;      //first-order IIR
+  real cutoffFrequency;
+  real samplingFrequency;
+  real a0, b1;  //coefficients
+  real z1;      //first-order IIR
 };
 
-auto OnePole::reset(Type type, double cutoffFrequency, double samplingFrequency) -> void {
+auto OnePole::reset(Type type, real cutoffFrequency, real samplingFrequency) -> void {
   this->type = type;
   this->cutoffFrequency = cutoffFrequency;
   this->samplingFrequency = samplingFrequency;
 
   z1 = 0.0;
-  double x = cos(2.0 * Math::Pi * cutoffFrequency / samplingFrequency);
+  real x = cos(2.0 * Math::Pi * cutoffFrequency / samplingFrequency);
   if(type == Type::LowPass) {
     b1 = +2.0 - x - sqrt((+2.0 - x) * (+2.0 - x) - 1);
     a0 = 1.0 - b1;
@@ -37,7 +39,7 @@ auto OnePole::reset(Type type, double cutoffFrequency, double samplingFrequency)
   }
 }
 
-auto OnePole::process(double in) -> double {
+auto OnePole::process(real in) -> real {
   return z1 = in * a0 + z1 * b1;
 }
 

nall/dsp/resampler/cubic.hpp

@@ -1,26 +1,27 @@
 #pragma once
 
 #include <nall/queue.hpp>
+#include <nall/dsp/dsp.hpp>
 
 namespace nall { namespace DSP { namespace Resampler {
 
 struct Cubic {
-  inline auto reset(double inputFrequency, double outputFrequency, uint queueSize = 0) -> void;
+  inline auto reset(real inputFrequency, real outputFrequency, uint queueSize = 0) -> void;
   inline auto pending() const -> bool { return samples.pending(); }
-  inline auto read() -> double { return samples.read(); }
-  inline auto write(double sample) -> void;
+  inline auto read() -> real { return samples.read(); }
+  inline auto write(real sample) -> void;
 
 private:
-  double inputFrequency;
-  double outputFrequency;
+  real inputFrequency;
+  real outputFrequency;
 
-  double ratio;
-  double fraction;
-  double history[4];
-  queue<double> samples;
+  real ratio;
+  real fraction;
+  real history[4];
+  queue<real> samples;
 };
 
-auto Cubic::reset(double inputFrequency, double outputFrequency, uint queueSize) -> void {
+auto Cubic::reset(real inputFrequency, real outputFrequency, uint queueSize) -> void {
   this->inputFrequency = inputFrequency;
   this->outputFrequency = outputFrequency;
   if(!queueSize) queueSize = outputFrequency * 0.02;  //20ms
@@ -31,7 +32,7 @@ auto Cubic::reset(double inputFrequency, double outputFrequency, uint queueSize)
   samples.resize(queueSize);
 }
 
-auto Cubic::write(double sample) -> void {
+auto Cubic::write(real sample) -> void {
   auto& mu = fraction;
   auto& s = history;
 
@@ -41,10 +42,10 @@ auto Cubic::write(double sample) -> void {
   s[3] = sample;
 
   while(mu <= 1.0) {
-    double A = s[3] - s[2] - s[0] + s[1];
-    double B = s[0] - s[1] - A;
-    double C = s[2] - s[0];
-    double D = s[1];
+    real A = s[3] - s[2] - s[0] + s[1];
+    real B = s[0] - s[1] - A;
+    real C = s[2] - s[0];
+    real D = s[1];
 
     samples.write(A * mu * mu * mu + B * mu * mu + C * mu + D);
     mu += ratio;

nall/string/markup/node.hpp

@@ -63,6 +63,12 @@ struct Node {
   auto natural() const -> uintmax { return text().natural(); }
   auto real() const -> double { return text().real(); }
 
+  auto text(const string& fallback) const -> string { return bool(*this) ? text() : fallback; }
+  auto boolean(bool fallback) const -> bool { return bool(*this) ? boolean() : fallback; }
+  auto integer(intmax fallback) const -> intmax { return bool(*this) ? integer() : fallback; }
+  auto natural(uintmax fallback) const -> uintmax { return bool(*this) ? natural() : fallback; }
+  auto real(double fallback) const -> double { return bool(*this) ? real() : fallback; }
+
   auto setName(const string& name = "") -> Node& { shared->_name = name; return *this; }
   auto setValue(const string& value = "") -> Node& { shared->_value = value; return *this; }