Add Native SFZ Player

cmake/modules/PluginList.cmake

@@ -63,6 +63,7 @@ SET(LMMS_PLUGIN_LIST
 	Sf2Player
 	Sfxr
 	Sid
+	SfzPlayer
 	SlewDistortion
 	SlicerT
 	SpectrumAnalyzer

include/FileBrowser.h

@@ -248,6 +248,7 @@ class FileItem : public FileBrowserWidgetItem
 		Preset,
 		Sample,
 		SoundFont,
+		SFZ,
 		Patch,
 		Midi,
 		VstPlugin,

include/InstrumentTrack.h

@@ -239,6 +239,9 @@ class LMMS_EXPORT InstrumentTrack : public Track, public MidiEventProcessor
 
 	void autoAssignMidiDevice( bool );
 
+	//! Returns a non-owning pointer to the LED in the MIDI CC rack which toggles whether the knobs send midi control change events
+	BoolModel* midiCCEnableModel() const { return m_midiCCEnable.get(); }
+
 	//! Returns a non-owning pointer to the model for the knob at the given index in the track's MIDI CC rack
 	FloatModel* midiCCModel(int index) const { return m_midiCCModel[index].get(); }
 

include/ThreadPool.h

@@ -25,6 +25,8 @@
 #ifndef LMMS_THREAD_POOL_H
 #define LMMS_THREAD_POOL_H
 
+#include "lmms_export.h"
+
 #include <atomic>
 #include <queue>
 #include <tuple>
@@ -38,7 +40,7 @@
 
 namespace lmms {
 //! A thread pool that can be used for asynchronous processing.
-class ThreadPool
+class LMMS_EXPORT ThreadPool
 {
 public:
 	//! Destroys the `ThreadPool` object.

plugins/SfzPlayer/CMakeLists.txt

@@ -0,0 +1,47 @@
+include(BuildPlugin)
+
+build_plugin(sfzplayer
+	SfzPlayer.cpp
+	SfzPlayer.h
+	SfzPlayerView.cpp
+	SfzPlayerView.h
+	SfzOpcodes.cpp
+	SfzOpcodes.h
+	SfzOpcodeState.cpp
+	SfzOpcodeState.h
+	SfzRegion.cpp
+	SfzRegion.h
+	SfzParser.cpp
+	SfzParser.h
+	SfzRegionPlayState.cpp
+	SfzRegionPlayState.h
+	SfzRegionManager.cpp
+	SfzRegionManager.h
+	SfzGlobalState.cpp
+	SfzGlobalState.h
+	SfzControlsConfig.h
+	SfzTrigger.cpp
+	SfzTrigger.h
+	SfzSampleBuffer.cpp
+	SfzSampleBuffer.h
+	SfzSamplePool.cpp
+	SfzSamplePool.h
+	SfzBasicWaves.cpp
+	SfzBasicWaves.h
+	MOCFILES
+	SfzPlayer.h
+	SfzPlayerView.h
+	SfzOpcodes.h
+	SfzOpcodeState.h
+	SfzRegion.h
+	SfzParser.h
+	SfzRegionPlayState.h
+	SfzRegionManager.h
+	SfzGlobalState.h
+	SfzControlsConfig.h
+	SfzTrigger.h
+	SfzSampleBuffer.h
+	SfzSamplePool.h
+	SfzBasicWaves.h
+	EMBEDDED_RESOURCES "${CMAKE_CURRENT_SOURCE_DIR}/*.svg"
+)

plugins/SfzPlayer/SfzBasicWaves.cpp

@@ -0,0 +1,87 @@
+/*
+ * SfzBasicWaves.cpp - Generators of basic wave shapes
+ *
+ * Copyright (c) 2026 Keratin
+ *
+ * This file is part of LMMS - https://lmms.io
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include "SfzBasicWaves.h"
+#include "lmms_math.h"
+#include <numbers>
+
+namespace lmms
+{
+
+const float SfzBasicWaves::generate(Shape shape, float sampleRate, int frame)
+{
+	// By default, the basic waves are played at C4 (midi key 60). This isn't in the spec afaik, but it makes things simple since pitch_keycenter defaults to 60.
+	constexpr float baseFreq = 261.625565301f;
+	// Amount through period
+	const float t = absFraction(frame * baseFreq / sampleRate);
+	// The region playback state handles incrementing the frame count at different rates based on the pitch, so we don't need to handle the actual frequency calculation here.
+
+	switch (shape)
+	{
+	case Shape::Sine:
+		return sine(t);
+	case Shape::Saw:
+		return saw(t);
+	case Shape::Square:
+		return square(t);
+	case Shape::Triangle:
+		return triangle(t);
+	case Shape::Noise:
+		return noise(t);
+	case Shape::Silence:
+		return 0.0f;
+	}
+	return 0.0f;
+}
+
+
+const float SfzBasicWaves::sine(float t)
+{
+	return sin(t * 2 * std::numbers::pi);
+}
+
+const float SfzBasicWaves::saw(float t)
+{
+	return 2.0f * t - 1.0f;
+}
+
+const float SfzBasicWaves::square(float t)
+{
+	return t > 0.5 ? 1.0f : -1.0f;
+}
+
+const float SfzBasicWaves::triangle(float t)
+{
+	return t < 0.5f
+		? 4.0f * t - 1.0f
+		: -(4.0f * (t - 0.5f) - 1.0f);
+}
+
+const float SfzBasicWaves::noise(float t)
+{
+	return fastRand(-1.0f, 1.0f);
+}
+
+
+} // namespace lmms

plugins/SfzPlayer/SfzBasicWaves.h

@@ -0,0 +1,56 @@
+/*
+ * SfzBasicWaves.h - Generators for audio wave shapes such as sine, saw, triangle, noise, etc
+ *
+ * Copyright (c) 2026 Keratin
+ *
+ * This file is part of LMMS - https://lmms.io
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef LMMS_SFZ_BASIC_WAVES_H
+#define LMMS_SFZ_BASIC_WAVES_H
+
+namespace lmms
+{
+
+class SfzBasicWaves
+{
+public:
+	enum class Shape
+	{
+		Sine,
+		Saw,
+		Square,
+		Triangle,
+		Noise,
+		Silence
+	};
+	//! Returns the calculated value of the waveform shape at the given number of frames from the start, given the sample rate.
+	static const float generate(Shape shape, float sampleRate, int frame);
+
+private:
+	static const float sine(float t);
+	static const float saw(float t);
+	static const float square(float t);
+	static const float triangle(float t);
+	static const float noise(float t);
+};
+
+} // namespace lmms
+
+#endif // LMMS_SFZ_BASIC_WAVES_H

plugins/SfzPlayer/SfzControlsConfig.h

@@ -0,0 +1,55 @@
+/*
+ * SfzControlsConfig.h - Helper class for storing info about which keyswitches exist, and which midi CC's are used by the sfz
+ *
+ * Copyright (c) 2026 Keratin
+ *
+ * This file is part of LMMS - https://lmms.io
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#ifndef LMMS_SFZ_CONTROLS_CONFIG_H
+#define LMMS_SFZ_CONTROLS_CONFIG_H
+
+#include "SfzOpcodeState.h"
+
+namespace lmms
+{
+
+class SfzControlsConfig : public SfzOpcodeState
+{
+public:
+	//! Keeps track of which CC's are actually used by the instrument, so that the GUI only needs to display those, not all 128
+	std::array<bool, NumMidiCCs> m_activeMidiCCs = {};
+
+	//! Stores information about each switch key, to make it easy to display on the GUI
+	struct SwitchKeyInfo
+	{
+		QString sw_label;
+		std::optional<int> sw_default;
+		int sw_lokey;
+		int sw_hikey;
+	};
+	std::map<int, SwitchKeyInfo> m_switchKeyInfo;
+};
+
+
+} // namespace lmms
+
+
+#endif // LMMS_SFZ_CONTROLS_CONFIG_H