snapshot

libraries/audio-tools/examples/examples-dsp/examples-faust/streams-generator-faust-i2s/streams-generator-faust-i2s.ino

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+/**
+ * @file streams-faust-i2s.ino
+ * @author Phil Schatzmann
+ * @brief Example how to use Faust as "Singal Processor"
+ * @version 0.1
+ * @date 2022-04-22
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h"
+#include "AudioTools/AudioLibs/AudioFaust.h"
+#include "volume.h"
+
+SineWaveGenerator<int16_t> sineWave(32000);                // subclass of SoundGenerator with max amplitude of 32000
+GeneratedSoundStream<int16_t> sound(sineWave);             // Stream generated from sine wave
+mydsp dsp;
+AudioBoardStream out(AudioKitEs8388V1);
+FaustStream<mydsp> faust(out);
+StreamCopy copier(faust, sound);  // copy mic to tfl
+
+// Arduino Setup
+void setup(void) {  
+  // Open Serial 
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
+
+  // Setup Faust volume control
+  auto cfg = faust.defaultConfig();
+  faust.begin(cfg);
+  faust.setLabelValue("0x00", 0.5);
+
+  // Setup sine wave generator
+  sineWave.begin(cfg.channels, cfg.sample_rate, N_B4);
+
+  // start I2S
+  auto cfg_i2s = out.defaultConfig(TX_MODE);
+  cfg_i2s.sample_rate = cfg.sample_rate; 
+  cfg_i2s.channels = cfg.channels;
+  cfg_i2s.bits_per_sample = cfg.bits_per_sample;
+  out.begin(cfg_i2s);
+
+}
+
+// Arduino loop - copy sound to out 
+void loop() {
+  copier.copy();
+}

libraries/audio-tools/examples/examples-dsp/examples-faust/streams-generator-faust-i2s/volume.dsp

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+declare compilation_options    "-single -scal -inpl -fx -I /Users/pschatzmann/.FaustLive-CurrentSession-2.0/Libs -I /Users/pschatzmann/.FaustLive-CurrentSession-2.0/Examples";
+declare library_path "volume";
+declare library_path "/Users/pschatzmann/.FaustLive-CurrentSession-2.0/Libs/stdfaust.lib";
+declare library_path "/Users/pschatzmann/.FaustLive-CurrentSession-2.0/Libs/basics.lib";
+declare library_path "/Users/pschatzmann/.FaustLive-CurrentSession-2.0/Libs/signals.lib";
+declare author "Grame";
+declare basics_lib_name "Faust Basic Element Library";
+declare basics_lib_version "0.1";
+declare copyright "(c)GRAME 2006";
+declare filename "volume";
+declare license "BSD";
+declare name "volume";
+declare signals_lib_name "Faust Signal Routing Library";
+declare signals_lib_version "0.0";
+declare version "1.0";
+process = _,(vslider("[1]", 0.0f, -70.0f, 4.0f, 0.10000000000000001f) : \(x1).(10.0f,(x1,20.0f : /) : pow) : _,0.0010000000000000009f : * : +~(_,0.999f : *)) : *;

libraries/audio-tools/examples/examples-dsp/examples-faust/streams-generator-faust-i2s/volume.h

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+/* ------------------------------------------------------------
+author: "Grame"
+copyright: "(c)GRAME 2006"
+license: "BSD"
+name: "volume"
+version: "1.0"
+Code generated with Faust 2.38.16 (https://faust.grame.fr)
+Compilation options: -lang cpp -es 1 -mcd 16 -single -ftz 0 
+------------------------------------------------------------ */
+
+#ifndef  __mydsp_H__
+#define  __mydsp_H__
+
+#ifndef FAUSTFLOAT
+#define FAUSTFLOAT float
+#endif 
+
+#include <algorithm>
+#include <cmath>
+#include <cstdint>
+
+#ifndef FAUSTCLASS 
+#define FAUSTCLASS mydsp
+#endif
+
+#ifdef __APPLE__ 
+#define exp10f __exp10f
+#define exp10 __exp10
+#endif
+
+#if defined(_WIN32)
+#define RESTRICT __restrict
+#else
+#define RESTRICT __restrict__
+#endif
+
+
+class mydsp : public dsp {
+	
+ private:
+	
+	FAUSTFLOAT fVslider0;
+	float fRec0[2];
+	int fSampleRate;
+	
+ public:
+	
+	void metadata(Meta* m) { 
+		m->declare("author", "Grame");
+		m->declare("basics_lib_name", "Faust Basic Element Library");
+		m->declare("basics_lib_version", "0.1");
+		m->declare("compilation_options", "-single -scal -inpl -fx -I /Users/pschatzmann/.FaustLive-CurrentSession-2.0/Libs -I /Users/pschatzmann/.FaustLive-CurrentSession-2.0/Examples");
+		m->declare("compile_options", "-lang cpp -es 1 -mcd 16 -single -ftz 0 ");
+		m->declare("copyright", "(c)GRAME 2006");
+		m->declare("filename", "volume.dsp");
+		m->declare("library_path", "volume");
+		m->declare("license", "BSD");
+		m->declare("name", "volume");
+		m->declare("signals_lib_name", "Faust Signal Routing Library");
+		m->declare("signals_lib_version", "0.0");
+		m->declare("version", "1.0");
+	}
+
+	virtual int getNumInputs() {
+		return 1;
+	}
+	virtual int getNumOutputs() {
+		return 1;
+	}
+	
+	static void classInit(int sample_rate) {
+	}
+	
+	virtual void instanceConstants(int sample_rate) {
+		fSampleRate = sample_rate;
+	}
+	
+	virtual void instanceResetUserInterface() {
+		fVslider0 = FAUSTFLOAT(0.0f);
+	}
+	
+	virtual void instanceClear() {
+		for (int l0 = 0; (l0 < 2); l0 = (l0 + 1)) {
+			fRec0[l0] = 0.0f;
+		}
+	}
+	
+	virtual void init(int sample_rate) {
+		classInit(sample_rate);
+		instanceInit(sample_rate);
+	}
+	virtual void instanceInit(int sample_rate) {
+		instanceConstants(sample_rate);
+		instanceResetUserInterface();
+		instanceClear();
+	}
+	
+	virtual mydsp* clone() {
+		return new mydsp();
+	}
+	
+	virtual int getSampleRate() {
+		return fSampleRate;
+	}
+	
+	virtual void buildUserInterface(UI* ui_interface) {
+		ui_interface->openVerticalBox("volume");
+		ui_interface->declare(&fVslider0, "1", "");
+		ui_interface->addVerticalSlider("0x00", &fVslider0, FAUSTFLOAT(0.0f), FAUSTFLOAT(-70.0f), FAUSTFLOAT(4.0f), FAUSTFLOAT(0.100000001f));
+		ui_interface->closeBox();
+	}
+	
+	virtual void compute(int count, FAUSTFLOAT** RESTRICT inputs, FAUSTFLOAT** RESTRICT outputs) {
+		FAUSTFLOAT* input0 = inputs[0];
+		FAUSTFLOAT* output0 = outputs[0];
+		float fSlow0 = (0.00100000005f * std::pow(10.0f, (0.0500000007f * float(fVslider0))));
+		for (int i0 = 0; (i0 < count); i0 = (i0 + 1)) {
+			fRec0[0] = (fSlow0 + (0.999000013f * fRec0[1]));
+			output0[i0] = FAUSTFLOAT((float(input0[i0]) * fRec0[0]));
+			fRec0[1] = fRec0[0];
+		}
+	}
+
+};
+
+#endif