Diff: vfo.cpp

Revision:

20:699e209fd19a

Parent:

19:f5e785fe50b1

--- a/vfo.cpp	Fri Feb 03 14:35:46 2017 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,106 +0,0 @@
-#include "signal_processing.h"
-
-
-VFO::VFO( void )
-{
-        // initial parameter setting.
-    this->form = triangle;
-    this->Fs = 48000;
-    this->frequency = 440;
-    this->duty_cycle = 0.5;
-    
-    this->update_parameters();
-}   // End of constructor()
-
-VFO::~VFO( void )
-{
-    // do nothing
-}
-    
-    
-
-void VFO::run(           
-            float out_buffer[],         // vfo output buffer
-            unsigned int block_size     // block size [sample]
-           )
-{
-        // place the signal processing coce here
-    for ( int i= 0; i< block_size; i++ )
-    {
-            // 1 : if phase < half_way; 0 : others.
-        if ( this->form == square ) 
-        {
-            if ( this->current_phase < this->half_way )
-                out_buffer[i] = 1.0;
-            else
-                out_buffer[i] = 0.0;
-        }
-        else    // form == triangle
-        {
-            if ( this->current_phase < this->half_way )
-                out_buffer[i] = this->rising_rate * this->current_phase;
-            else
-                out_buffer[i] = 1 + this->falling_rate * ( this->current_phase - this->half_way );
-        }
-        
-            // update phase
-        this->current_phase += this->frequency;
-            // limit the range of the phase.
-        if ( this->current_phase >= this->Fs )
-            this->current_phase -= this->Fs;
-    }
-}   // End of run()
-    
-
-void VFO::set_Fs( int Fs )
-{
-        // regulate the Fs.
-    if ( Fs != 32000 && Fs != 44100 && Fs != 96000 && Fs != 48000 )
-        Fs = 48000;
-    this->Fs = Fs;
-    
-    this->update_parameters();
-}
-
-void VFO::set_frequency( int freq )
-{
-    if ( freq > this->Fs / 4 )
-        freq = Fs / 4;
-    this->frequency = freq;
-    
-    this->update_parameters();
-}
-
-void VFO::set_duty_cycle( float duty )
-{
-    if ( duty > 0.5f )   // high limit
-        duty = 0.5f;
-    if ( duty < 0.0f )  // low limit
-        duty = 0.0f;
-    this->duty_cycle = duty;
-    
-    this->update_parameters();
-}
-
-void VFO::set_wave_form( wave_form form )
-{
-    this->form = form;
-}
-
-
-    // update the internal parameter by given parameters
-void VFO::update_parameters(void)
-{
-        // calc the half_way;
-    this-> half_way = this->Fs * this-> duty_cycle;
-
-        // forbid to be zero.
-    if ( this-> half_way < this->frequency )
-        half_way = this->frequency;              
-        
-        // for triangle wave;
-    this->rising_rate = 1.0 / this->half_way;
-    
-    this->falling_rate = - 1.0 / ( this->Fs - this->half_way ); 
-}
-