seiichi horie / amakusa

Basic Audio Signal Processing Library

Dependents:   unzen_sample_nucleo_f746 skeleton_unzen_nucleo_f746 ifmag_noise_canceller synthesizer_f746

オーディオ信号処理用のライブラリです。

mbed-dspのフィルタ群向けに作ったクラス・ラッパーのほか、以下のクラスを用意しています。

  • ヒステリシス
  • sin/cosオシレータ
  • リミッター

クラスは全て名前空間amakusaに含まれます。

Diff: oscsincos.cpp

Revision:
2:fbdf03b330ae
Parent:
0:058daa59980d
--- a/oscsincos.cpp	Mon Jan 02 11:04:49 2017 +0000
+++ b/oscsincos.cpp	Sat Jan 21 07:16:37 2017 +0000
@@ -7,27 +7,32 @@
 #define M_PI  3.141592653589793F
 #endif
 
-amakusa::OSCSinCos::OSCSinCos( float freq, int Fs )
+amakusa::OSCSinCos::OSCSinCos( float freq, int Fs, int block_size )
 {
         this->sampleFreq = Fs;
         this->setFrequency( freq );
         this->setPhase( 0.0 );      // must call after setFrequenc()
+        this->bs = block_size;
 }
 
-void amakusa::OSCSinCos::run( float *s, float *c , int count )
+void amakusa::OSCSinCos::run( float *s, float *c)
 {
-    for ( int i=0; i<count; i++ )
+    
+    for ( int i=0; i<this->bs; i++ )
     {
             // to make the expression simple
         float phase = this->deltaPhase * ( i+ this->phaseInSample );
         
+            // normal sind cosine
         s[i] = std::sin( phase );
             // skip cosine if c is NULL
         if ( c != NULL )
             c[i] = std::cos( phase );
+            
+
     }
         // update the internal phase
-    this->phaseInSample += count;
+    this->phaseInSample += this->bs;
         // truncate the phase
     while ( this->phaseInSample >= this->sampleFreq )
         this->phaseInSample -= this->sampleFreq;