From b703eab295330e6f81564fbb39a10a1a2fdd2f54 Mon Sep 17 00:00:00 2001
From: Robert Jonsson <spamatica@gmail.com>
Date: Sun, 27 Dec 2009 11:30:35 +0000
Subject: moved old qt4 branch

---
 muse_qt4_evolution/synti/s1/s1.cpp | 156 +++++++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 muse_qt4_evolution/synti/s1/s1.cpp

(limited to 'muse_qt4_evolution/synti/s1/s1.cpp')

diff --git a/muse_qt4_evolution/synti/s1/s1.cpp b/muse_qt4_evolution/synti/s1/s1.cpp
new file mode 100644
index 00000000..596a5797
--- /dev/null
+++ b/muse_qt4_evolution/synti/s1/s1.cpp
@@ -0,0 +1,156 @@
+//=========================================================
+//  MusE
+//  Linux Music Editor
+//  $Id: s1.cpp,v 1.10 2005/01/13 21:16:27 wschweer 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 "synti/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;
+
+      virtual void note(int channel, int pitch, int velo);
+      virtual void process(float** buffer, int offset, int n);
+
+   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;
+      }
+
+//---------------------------------------------------------
+//   ~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;
+      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;
+            sample = wave_table[accu >> 8];
+            //
+            // 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
+//---------------------------------------------------------
+
+static Mess* instantiate(int sr, 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
+            };
+
+      const MESS* mess_descriptor() { return &descriptor; }
+      }
+
-- 
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