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authorRobert Jonsson <spamatica@gmail.com>2011-03-07 19:01:11 +0000
committerRobert Jonsson <spamatica@gmail.com>2011-03-07 19:01:11 +0000
commite40fc849149dd97c248866a4a1d026dda5e57b62 (patch)
treeb12b358f3b3a0608001d30403358f8443118ec5f /attic/muse2-oom/muse2/synti/s1/s1.cpp
parent1bd4f2e8d9745cabb667b043171cad22c8577768 (diff)
clean3
Diffstat (limited to 'attic/muse2-oom/muse2/synti/s1/s1.cpp')
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+//=========================================================
+// MusE
+// Linux Music Editor
+// $Id: s1.cpp,v 1.9.2.5 2009/11/19 04:20:33 terminator356 Exp $
+//
+// S1 - simple mono demo synthesizer
+// - plays only one note at a time
+// - has no gui nor any controller
+//
+// Version 0.2: stop note on wave zero crossing to avoid
+// clicks
+//
+// (C) Copyright 2001-2004 Werner Schweer (ws@seh.de)
+//=========================================================
+
+#include <cmath>
+#include <list>
+
+#include <QMessageBox>
+
+#include "libsynti/mono.h"
+
+#define RESOLUTION 16384
+
+//---------------------------------------------------------
+// S1 - simple mono demo synthesizer
+//---------------------------------------------------------
+
+
+class S1 : public MessMono {
+ static int useCount;
+ static float *wave_table;
+
+ int gate;
+ float freq;
+ unsigned accu;
+ float sample;
+ bool _showGui;
+
+ int param;
+
+ virtual void note(int channel, int pitch, int velo);
+ //virtual void processMessages();
+ virtual void process(float** buffer, int offset, int n);
+ virtual bool hasGui() const { return true; }
+ virtual bool guiVisible() const { return _showGui; }
+ virtual void showGui(bool);
+ virtual bool setController(int channel, int ctrl, int val);
+ virtual int getControllerInfo(int id, const char** name, int* ctrl, int* min, int* max, int* initval) const;
+
+ public:
+ S1();
+ ~S1();
+ };
+
+float* S1::wave_table;
+int S1::useCount = 0;
+
+//---------------------------------------------------------
+// S1
+//---------------------------------------------------------
+
+S1::S1() : MessMono()
+ {
+
+ if (useCount++ == 0) {
+ //
+ // create sinus wave table
+ //
+ wave_table = new float[RESOLUTION];
+ for (int i = 0; i < RESOLUTION; i++)
+ wave_table[i] = sin ((i * 2.0 * M_PI) / RESOLUTION) / 6.0;
+ }
+ gate = 0;
+
+ param = 0;
+
+ _showGui=false;
+ showGui(true);
+ }
+
+//---------------------------------------------------------
+// ~S1
+//---------------------------------------------------------
+
+S1::~S1()
+ {
+ if (--useCount == 0)
+ delete[] wave_table;
+ }
+
+//---------------------------------------------------------
+// noteon
+// process note on
+//---------------------------------------------------------
+
+void S1::note(int /*channel*/, int pitch, int velo)
+ {
+ if (velo == 0) {
+ //
+ // note off
+ //
+ if (sample == 0.0)
+ gate = 0;
+ else if (sample > 0.0)
+ gate = 2;
+ else if (sample < 0.0)
+ gate = 3;
+ }
+ else {
+ //
+ // note on
+ //
+ accu = 0;
+ gate = 1;
+ freq = 8.176 * exp(float(pitch)*log(2.0)/12.0);
+ }
+ }
+
+//---------------------------------------------------------
+// write
+// synthesize n samples into buffer+offset
+//---------------------------------------------------------
+
+void S1::process(float** buffer, int offset, int n)
+ {
+ if (gate == 0)
+ return;
+ float* p = buffer[0] + offset;
+ float sample1, sample2;
+ unsigned freq_256 = (int) (freq * ((double) RESOLUTION) / sampleRate() * 256.0);
+ for (int i = 0; i < n; i++) {
+ accu += freq_256;
+ while (accu >= RESOLUTION * 256)
+ accu -= RESOLUTION * 256;
+
+ sample1 = wave_table[accu >> 8]; // sinus component
+
+ if (sample1< 0.0f) // square wave component
+ sample2 = -0.4;
+ else
+ sample2 = 0.4;
+
+ sample = ((1.0-float(param)/127.0)*sample1 + (float(param)/127.0)*sample2) / 2.0;
+
+ //
+ // stop on zero crossing
+ // if in decay state
+ //
+ if (gate == 2 && sample <= 0.0) {
+ gate = 0;
+ break;
+ }
+ else if (gate == 3 && sample >= 0.0) {
+ gate = 0;
+ break;
+ }
+ p[i] += sample;
+ }
+ }
+
+
+//---------------------------------------------------------
+// inst
+//---------------------------------------------------------
+
+
+void S1::showGui(bool show)
+ {
+ if (show)
+ QMessageBox::information( NULL, "S1",
+ "S1 is a demo synth mainly for\n"
+ "developers wishing to learn\n"
+ "how to make a M.E.S.S synth.\n"
+ "\n"
+ "One modulation parameter is available,\n"
+ "it sweeps the signal between square and\n"
+ "sinus wave.\n", 1 );
+ }
+
+bool S1::setController(int, int ctrl, int val)
+ {
+ if (ctrl == 1) {
+ param = val;
+ }
+ return true;
+ }
+
+int S1::getControllerInfo(int id, const char** name, int* ctrl, int* min, int* max, int* initval) const
+ {
+ if (id == 0) {
+ *name = "Modulation";
+ *ctrl = 1;
+ *min = 0;
+ *max = 127;
+ *initval = 0;
+ return 1;
+ }
+ else
+ return 0;
+ }
+
+//---------------------------------------------------------
+// inst
+//---------------------------------------------------------
+class QWidget;
+
+
+static Mess* instantiate(int sr, QWidget*, QString* projectPathPtr, const char*)
+ {
+ S1* s1 = new S1();
+ s1->setSampleRate(sr);
+ return s1;
+ }
+
+extern "C" {
+ static MESS descriptor = {
+ "S1",
+ "S1 MusE Demo Software Synthesizer",
+ "0.2", // version string
+ MESS_MAJOR_VERSION, MESS_MINOR_VERSION,
+ instantiate
+ };
+ // We must compile with -fvisibility=hidden to avoid namespace
+ // conflicts with global variables.
+ // Only visible symbol is "mess_descriptor".
+ // (TODO: all plugins should be compiled this way)
+
+ __attribute__ ((visibility("default")))
+ const MESS* mess_descriptor() { return &descriptor; }
+ }
+