sfizz/tests/RegionActivationT.cpp

// SPDX-License-Identifier: BSD-2-Clause

// This code is part of the sfizz library and is licensed under a BSD 2-clause
// license. You should have receive a LICENSE.md file along with the code.
// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz

#include "sfizz/Layer.h"
#include "sfizz/Region.h"
#include "sfizz/Synth.h"
#include "sfizz/SfzHelpers.h"
#include "TestHelpers.h"
#include "catch2/catch.hpp"
using namespace Catch::literals;
using namespace sfz::literals;

TEST_CASE("Region activation", "Region tests")
{
    sfz::MidiState midiState;
    sfz::Region region { 0 };

    region.parseOpcode({ "sample", "*sine" });
    SECTION("Basic state")
    {
        sfz::Layer layer { region, midiState };
        layer.updateCCState(4, 0_norm);
        REQUIRE(layer.isSwitchedOn());
    }

    SECTION("Single CC range")
    {
        region.parseOpcode({ "locc4", "56" });
        region.parseOpcode({ "hicc4", "59" });
        sfz::Layer layer { region, midiState };
        layer.updateCCState(4, 0_norm);
        REQUIRE(!layer.isSwitchedOn());
        layer.updateCCState(4, 57_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(4, 56_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(4, 59_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(4, 43_norm);
        REQUIRE(!layer.isSwitchedOn());
        layer.updateCCState(4, 65_norm);
        REQUIRE(!layer.isSwitchedOn());
        layer.updateCCState(6, 57_norm);
        REQUIRE(!layer.isSwitchedOn());
    }

    SECTION("Multiple CC ranges")
    {
        region.parseOpcode({ "locc4", "56" });
        region.parseOpcode({ "hicc4", "59" });
        region.parseOpcode({ "locc54", "18" });
        region.parseOpcode({ "hicc54", "27" });
        sfz::Layer layer { region, midiState };
        layer.updateCCState(4, 0_norm);
        layer.updateCCState(54, 0_norm);
        REQUIRE(!layer.isSwitchedOn());
        layer.updateCCState(4, 57_norm);
        REQUIRE(!layer.isSwitchedOn());
        layer.updateCCState(54, 19_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(54, 17_norm);
        REQUIRE(!layer.isSwitchedOn());
        layer.updateCCState(54, 27_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(4, 56_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(4, 59_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(54, 2_norm);
        REQUIRE(!layer.isSwitchedOn());
        layer.updateCCState(54, 26_norm);
        REQUIRE(layer.isSwitchedOn());
        layer.updateCCState(4, 65_norm);
        REQUIRE(!layer.isSwitchedOn());
    }

    SECTION("Bend ranges")
    {
        region.parseOpcode({ "lobend", "56" });
        region.parseOpcode({ "hibend", "243" });
        sfz::Layer layer { region, midiState };
        layer.registerPitchWheel(0);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerPitchWheel(sfz::normalizeBend(56));
        REQUIRE(layer.isSwitchedOn());
        layer.registerPitchWheel(sfz::normalizeBend(243));
        REQUIRE(layer.isSwitchedOn());
        layer.registerPitchWheel(sfz::normalizeBend(245));
        REQUIRE(!layer.isSwitchedOn());
    }

    SECTION("Aftertouch ranges")
    {
        region.parseOpcode({ "lochanaft", "56" });
        region.parseOpcode({ "hichanaft", "68" });
        sfz::Layer layer { region, midiState };
        layer.registerAftertouch(sfz::normalize7Bits(0));
        REQUIRE(!layer.isSwitchedOn());
        layer.registerAftertouch(sfz::normalize7Bits(56));
        REQUIRE(layer.isSwitchedOn());
        layer.registerAftertouch(sfz::normalize7Bits(68));
        REQUIRE(layer.isSwitchedOn());
        layer.registerAftertouch(sfz::normalize7Bits(98));
        REQUIRE(!layer.isSwitchedOn());
    }

    SECTION("BPM ranges")
    {
        region.parseOpcode({ "lobpm", "56" });
        region.parseOpcode({ "hibpm", "68" });
        sfz::Layer layer { region, midiState };
        layer.registerTempo(2.0f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerTempo(0.90f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerTempo(1.01f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerTempo(1.1f);
        REQUIRE(!layer.isSwitchedOn());
    }

    SECTION("Sequences: length 2, default position")
    {
        region.parseOpcode({ "seq_length", "2" });
        region.parseOpcode({ "seq_position", "1" });
        region.parseOpcode({ "key", "40" });
        sfz::Layer layer { region, midiState };
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
    }
    SECTION("Sequences: length 2, position 2")
    {
        region.parseOpcode({ "seq_length", "2" });
        region.parseOpcode({ "seq_position", "2" });
        region.parseOpcode({ "key", "40" });
        sfz::Layer layer { region, midiState };
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
    }
    SECTION("Sequences: length 3, position 2")
    {
        region.parseOpcode({ "seq_length", "3" });
        region.parseOpcode({ "seq_position", "2" });
        region.parseOpcode({ "key", "40" });
        sfz::Layer layer { region, midiState };
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOn(40, 64_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
        layer.registerNoteOff(40, 0_norm, 0.5f);
        REQUIRE(!layer.isSwitchedOn());
    }
}

TEST_CASE("[Keyswitches] Normal lastKeyswitch range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <global> sw_lokey=40 sw_hikey=42 sw_default=40
        <region> sw_last=40 key=60 sample=*sine
        <region> sw_last=41 key=62 sample=*saw
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 41, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
}

TEST_CASE("[Keyswitches] No lastKeyswitch range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <region> sw_last=40 key=60 sample=*sine
        <region> sw_last=41 key=62 sample=*saw
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    synth.noteOn(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 41, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
}

TEST_CASE("[Keyswitches] Out of lastKeyswitch range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <global> sw_lokey=40 sw_hikey=42 sw_default=40
        <region> sw_last=40 key=60 sample=*sine
        <region> sw_last=43 key=62 sample=*saw
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 43, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
}

TEST_CASE("[Keyswitches] Overlapping key and lastKeyswitch range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <global> sw_lokey=1 sw_hikey=127 sw_default=40
        <region> sw_last=40 key=60 sample=*sine
        <region> sw_last=41 key=62 sample=*saw
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 41, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
    synth.noteOn(0, 43, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 3);
}

TEST_CASE("[Keyswitches] sw_down, in range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <global> sw_lokey=1 sw_hikey=127 sw_default=40
        <region> sw_down=40 key=60 sample=*sine
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    synth.noteOn(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOff(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
}

TEST_CASE("[Keyswitches] sw_down, out of range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <global> sw_lokey=1 sw_hikey=10 sw_default=40
        <region> sw_down=40 key=60 sample=*sine
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    synth.noteOn(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOff(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
}

TEST_CASE("[Keyswitches] sw_up, in range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <global> sw_lokey=1 sw_hikey=127 sw_default=40
        <region> sw_up=40 key=60 sample=*sine
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOff(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
}

TEST_CASE("[Keyswitches] sw_up, out of range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/keyswitches.sfz", R"(
        <global> sw_lokey=1 sw_hikey=127 sw_default=40
        <region> sw_up=40 key=60 sample=*sine
    )");
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOn(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    synth.noteOff(0, 40, 64);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
}

TEST_CASE("[Keyswitches] sw_default")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_default.sfz", R"(
        <global> sw_lokey=30 sw_hikey=50 sw_default=40
        <region> sw_last=41 key=51 sample=*sine
        <region> sw_last=40 key=52 sample=*sine
        <region> sw_last=41 key=53 sample=*sine
        <region> sw_last=40 key=54 sample=*sine
    )");
    REQUIRE( synth.getNumRegions() == 4 );
    REQUIRE( !synth.getLayerView(0)->isSwitchedOn() );
    REQUIRE( synth.getLayerView(1)->isSwitchedOn() );
    REQUIRE( !synth.getLayerView(2)->isSwitchedOn() );
    REQUIRE( synth.getLayerView(3)->isSwitchedOn() );
}

TEST_CASE("[Keyswitches] sw_default and playing with switches")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_default.sfz", R"(
        <global> sw_lokey=30 sw_hikey=50 sw_default=40
        <region> sw_last=41 key=51 sample=*sine
        <region> sw_last=40 key=52 sample=*sine
        <region> sw_last=41 key=53 sample=*sine
        <region> sw_last=40 key=54 sample=*sine
    )");
    REQUIRE( synth.getNumRegions() == 4 );
    REQUIRE( !synth.getLayerView(0)->isSwitchedOn() );
    REQUIRE( synth.getLayerView(1)->isSwitchedOn() );
    REQUIRE( !synth.getLayerView(2)->isSwitchedOn() );
    REQUIRE( synth.getLayerView(3)->isSwitchedOn() );
    synth.noteOn(0, 41, 64);
    synth.noteOff(0, 41, 0);
    synth.renderBlock(buffer);
    REQUIRE( synth.getLayerView(0)->isSwitchedOn() );
    REQUIRE( !synth.getLayerView(1)->isSwitchedOn() );
    REQUIRE( synth.getLayerView(2)->isSwitchedOn() );
    REQUIRE( !synth.getLayerView(3)->isSwitchedOn() );
    synth.noteOn(0, 40, 64);
    synth.noteOff(0, 40, 64);
    synth.renderBlock(buffer);
    REQUIRE( !synth.getLayerView(0)->isSwitchedOn() );
    REQUIRE( synth.getLayerView(1)->isSwitchedOn() );
    REQUIRE( !synth.getLayerView(2)->isSwitchedOn() );
    REQUIRE( synth.getLayerView(3)->isSwitchedOn() );
}

TEST_CASE("[Keyswitches] sw_previous in range")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
        <region> sample=*saw sw_previous=60 lokey=50 hikey=70
    )");
    // Note: sforzando seems to activate by default if sw_previous is indeed 60,
    // but not any other value. As it does not seem really useful at this point
    // the test assumes that sw_previous regions are disabled by default
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 51, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 51, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 2);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
}

TEST_CASE("[Keyswitches] sw_previous out of range")
{
    // The behavior is the same in this case, regardless of the keyrange
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
        <region> sample=*saw sw_previous=60 lokey=50 hikey=55
    )");
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 51, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 0);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 51, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getNumActiveVoices() == 1);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    synth.noteOn(0, 61, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
}

TEST_CASE("[Keyswitches] sw_lolast and sw_hilast")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
        <region> sw_lolast=57 sw_hilast=59 key=70 sample=*saw
        <region> sw_lolast=60 sw_hilast=62 key=72 sample=*sine
    )");
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 51, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 57, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 58, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 61, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 59, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 62, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(synth.getLayerView(1)->isSwitchedOn());
}

TEST_CASE("[Keyswitches] sw_lolast and sw_hilast with sw_last")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
        <region> sw_last=40 sw_lolast=57 sw_hilast=59 key=70 sample=*saw
        <region> sw_lolast=60 sw_hilast=62 sw_last=41 key=72 sample=*sine
    )");
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 40, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 41, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 57, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 41, 64);
    synth.renderBlock(buffer);
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 60, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(synth.getLayerView(1)->isSwitchedOn());
    synth.noteOn(0, 40, 64);
    synth.renderBlock(buffer);
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(synth.getLayerView(1)->isSwitchedOn());
}

TEST_CASE("[Keyswitches] sw_lolast and sw_hilast with sw_default")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
        <global> sw_default=58
        <region> sw_lolast=57 sw_hilast=59 key=70 sample=*saw
        <region> sw_lolast=60 sw_hilast=62 key=72 sample=*sine
    )");
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
}

TEST_CASE("[Keyswitches] Multiple sw_default")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
        <global> sw_default=60
        <region> sw_last=60 key=70 sample=*saw
        <group> sw_default=58
        <region> sw_last=59 key=72 sample=*saw
        <master> sw_default=59
        <region> sw_last=62 key=73 sample=*saw
    )");
    REQUIRE(!synth.getLayerView(0)->isSwitchedOn());
    // Only the last one is taken into account
    REQUIRE(synth.getLayerView(1)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(2)->isSwitchedOn());
}

TEST_CASE("[Keyswitches] Multiple sw_default, in region")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
        <global> sw_default=60
        <region> sw_last=58 key=70 sample=*saw
        <region> sw_default=58 sw_last=59 key=72 sample=*saw
    )");
    REQUIRE(synth.getLayerView(0)->isSwitchedOn());
    REQUIRE(!synth.getLayerView(1)->isSwitchedOn());
}

TEST_CASE("[Region activation] Polyphonic aftertouch")
{
    sfz::Synth synth;
    SECTION("Basic sequence, note on")
    {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/polyaft.sfz", R"(
            <region> sample=*saw lokey=48 hikey=60
            <region> lopolyaft=50 hipolyaft=100 sample=*sine lokey=36 hikey=47
        )");
        synth.noteOn(0, 50, 100);
        REQUIRE( synth.getNumActiveVoices() == 1);
        synth.noteOn(1, 40, 100);
        REQUIRE( synth.getNumActiveVoices() == 1); // no notes playing
        synth.polyAftertouch(2, 40, 80);
        synth.noteOn(3, 40, 100);
        REQUIRE( synth.getNumActiveVoices() == 2);
    }

    SECTION("Basic sequence, note off, no polyaft set")
    {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/polyaft.sfz", R"(
            <region> sample=*saw
            <region> lopolyaft=50 hipolyaft=100 sample=*sine trigger=release
        )");
        synth.noteOn(0, 50, 100);
        REQUIRE( synth.getNumActiveVoices() == 1);
        synth.noteOff(1, 50, 0);
        REQUIRE( synth.getNumActiveVoices() == 1); // no note off playing
    }

    SECTION("Basic sequence, note off")
    {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/polyaft.sfz", R"(
            <region> sample=*saw
            <region> lopolyaft=50 hipolyaft=100 sample=*sine trigger=release
        )");
        synth.noteOn(0, 50, 100);
        REQUIRE( synth.getNumActiveVoices() == 1);
        synth.polyAftertouch(2, 50, 80);
        synth.noteOff(3, 50, 0);
        REQUIRE( synth.getNumActiveVoices() == 2); // no note off playing
    }
}

TEST_CASE("[Keyswitches] sw_default with octave_offset")
{
    sfz::Synth synth;
    std::vector<std::string> messageList;
    sfz::Client client(&messageList);
    client.setReceiveCallback(&simpleMessageReceiver);
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };
    std::vector<std::string> expected {
        "/sw/last/current,i : { 59 }",
    };

    SECTION("In <global>") {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
            <control> octave_offset=1 note_offset=-1
            <global> sw_default=48
            <region> sample=*sine
        )");
        synth.dispatchMessage(client, 0, "/sw/last/current", "", nullptr);
        REQUIRE(messageList == expected);
    }

    SECTION("In <master>") {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
            <control> octave_offset=1 note_offset=-1
            <master> sw_default=48
            <region> sample=*sine
        )");
        synth.dispatchMessage(client, 0, "/sw/last/current", "", nullptr);
        REQUIRE(messageList == expected);
    }

    SECTION("In <group>") {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
            <control> octave_offset=1 note_offset=-1
            <group> sw_default=48
            <region> sample=*sine
        )");
        synth.dispatchMessage(client, 0, "/sw/last/current", "", nullptr);
        REQUIRE(messageList == expected);
    }

    SECTION("In <region>") {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
            <control> octave_offset=1 note_offset=-1
            <region> sample=*sine sw_default=48
        )");
        synth.dispatchMessage(client, 0, "/sw/last/current", "", nullptr);
        REQUIRE(messageList == expected);
    }
}

TEST_CASE("[Region activation] Program change")
{
    sfz::Synth synth;
    sfz::AudioBuffer<float> buffer { 2, static_cast<unsigned>(synth.getSamplesPerBlock()) };

    SECTION("Default value") {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
            <region> sample=*saw
        )");
        REQUIRE(synth.getLayerView(0)->isSwitchedOn());
        synth.noteOn(0, 51, 64);
        synth.renderBlock(buffer);
        REQUIRE(numPlayingVoices(synth) == 1);
        synth.programChange(0, 45);
        REQUIRE(synth.getLayerView(0)->isSwitchedOn());
        synth.noteOn(0, 53, 64);
        synth.renderBlock(buffer);
        REQUIRE(numPlayingVoices(synth) == 2);
    }

    SECTION("Change range") {
        synth.loadSfzString(fs::current_path() / "tests/TestFiles/sw_previous.sfz", R"(
            <region> sample=*saw hiprog=2
            <region> sample=*sine loprog=1 hiprog=126
            <region> sample=*tri loprog=-1 hiprog=200
        )");
        synth.noteOn(0, 51, 64);
        synth.renderBlock(buffer);
        REQUIRE(playingSamples(synth) == std::vector<std::string> { "*saw", "*tri" });
        synth.programChange(0, 5);
        synth.noteOn(0, 53, 64);
        synth.renderBlock(buffer);
        REQUIRE(playingSamples(synth) == std::vector<std::string> { "*saw", "*tri", "*sine", "*tri" });
        synth.programChange(0, 127);
        synth.noteOn(0, 54, 64);
        synth.renderBlock(buffer);
        REQUIRE(playingSamples(synth) == std::vector<std::string> { "*saw", "*tri", "*sine", "*tri", "*tri" });
    }
}