seiichi horie / Mbed 2 deprecated synthesizer_f746

Synthesizer based on the Unzen / Nucleo F746ZG

Dependencies:   amakusa mbed-dsp mbed shimabara ukifune unzen_nucleo_f746

Fork of skeleton_unzen_nucleo_f746 by seiichi horie

雲仙フレームワークのテストとして作っているプロジェクトです。中身はどんどん変っていきます。 説明はDSP空挺団の「シンセサイザー」カテゴリーを参照してください。初回は「ドッグフードを食べる」です。

monophonic.cpp@29:8ee84bda128c, 2017-02-18 (annotated)

Committer:
shorie
Date:
Sat Feb 18 04:37:19 2017 +0000
Revision:
29:8ee84bda128c
Parent:
28:547f19ed6f67 
Limiter function is confirmed. SV filter ignored bug was fixed.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shorie 18:b9b1116f8768 1 #include "signal_processing.h"
shorie 18:b9b1116f8768 2
shorie 18:b9b1116f8768 3
shorie 18:b9b1116f8768 4 // constructor.
shorie 27:fcb1f1da2ad7 5 Monophonic::Monophonic( unsigned int a_block_size )
shorie 18:b9b1116f8768 6 {
shorie 27:fcb1f1da2ad7 7 this->block_size = a_block_size;
shorie 27:fcb1f1da2ad7 8
shorie 18:b9b1116f8768 9 // initializing the subm-odules.
shorie 26:e99f71165e19 10 this->vfo = new VFO(block_size); // allocate VFO
shorie 27:fcb1f1da2ad7 11 this->dc_blocker = new DCBlocker( this->block_size );
shorie 27:fcb1f1da2ad7 12 this->sv_filter = new SVFilter( this->block_size );
shorie 27:fcb1f1da2ad7 13 this->eg = new EG( this->block_size );
shorie 29:8ee84bda128c 14 this->limitter = new amakusa::LimitterLinAtan( this->block_size );
shorie 20:53021b2c424d 15
shorie 20:53021b2c424d 16 work_buf_a = new float32_t[block_size];
shorie 20:53021b2c424d 17 work_buf_b = new float32_t[block_size];
shorie 26:e99f71165e19 18
shorie 18:b9b1116f8768 19 } // End of constructor()
shorie 18:b9b1116f8768 20
shorie 18:b9b1116f8768 21 Monophonic::~Monophonic( void )
shorie 18:b9b1116f8768 22 {
shorie 18:b9b1116f8768 23 // initializing the subm-odules.
shorie 18:b9b1116f8768 24 delete this->vfo;
shorie 20:53021b2c424d 25 delete this->dc_blocker;
shorie 20:53021b2c424d 26 delete this->sv_filter;
shorie 27:fcb1f1da2ad7 27 delete this->eg;
shorie 29:8ee84bda128c 28 delete this->limitter;
shorie 20:53021b2c424d 29
shorie 20:53021b2c424d 30 delete[] work_buf_a;
shorie 20:53021b2c424d 31 delete[] work_buf_b;
shorie 18:b9b1116f8768 32 } // End of constructor()
shorie 18:b9b1116f8768 33
shorie 18:b9b1116f8768 34
shorie 18:b9b1116f8768 35
shorie 18:b9b1116f8768 36 // Run all signal processing.
shorie 18:b9b1116f8768 37 void Monophonic::run(
shorie 26:e99f71165e19 38 float out_buffer[] // place to write the right output samples
shorie 18:b9b1116f8768 39 )
shorie 18:b9b1116f8768 40 {
shorie 18:b9b1116f8768 41 // place the signal processing coce here
shorie 26:e99f71165e19 42 this->vfo->run( work_buf_a );
shorie 22:dc2cbe8db9d9 43
shorie 22:dc2cbe8db9d9 44 // blocking DC.
shorie 22:dc2cbe8db9d9 45 this->dc_blocker->run( work_buf_a, work_buf_b );
shorie 18:b9b1116f8768 46
shorie 22:dc2cbe8db9d9 47 // applying filter.
shorie 29:8ee84bda128c 48 this->sv_filter->run( work_buf_b, work_buf_a );
shorie 18:b9b1116f8768 49
shorie 26:e99f71165e19 50 // generate envelope
shorie 29:8ee84bda128c 51 this->eg->run( work_buf_b );
shorie 26:e99f71165e19 52
shorie 26:e99f71165e19 53 // apply envelope
shorie 27:fcb1f1da2ad7 54 for ( int i= 0; i< this->block_size; i++ )
shorie 29:8ee84bda128c 55 work_buf_b[ i ] *= work_buf_a[ i ];
shorie 29:8ee84bda128c 56
shorie 29:8ee84bda128c 57 // apply amplitude limitter
shorie 29:8ee84bda128c 58 this->limitter->run( work_buf_b, out_buffer );
shorie 26:e99f71165e19 59
shorie 18:b9b1116f8768 60 } // End of run()
shorie 18:b9b1116f8768 61
shorie 18:b9b1116f8768 62
shorie 18:b9b1116f8768 63 // Sampling Frequency
shorie 18:b9b1116f8768 64 void Monophonic::set_Fs( int Fs )
shorie 18:b9b1116f8768 65 {
shorie 18:b9b1116f8768 66 this->vfo->set_Fs( Fs );
shorie 22:dc2cbe8db9d9 67 this->sv_filter->set_Fs( Fs );
shorie 18:b9b1116f8768 68 }
shorie 18:b9b1116f8768 69
shorie 18:b9b1116f8768 70 // Oscillation Frequency
shorie 28:547f19ed6f67 71 void Monophonic::set_vfo_frequency( float freq )
shorie 18:b9b1116f8768 72 {
shorie 18:b9b1116f8768 73 this->vfo->set_frequency( freq );
shorie 22:dc2cbe8db9d9 74 this->sv_filter->set_fc( freq );
shorie 18:b9b1116f8768 75 }
shorie 18:b9b1116f8768 76
shorie 18:b9b1116f8768 77 // Duty Cycle of VFO
shorie 18:b9b1116f8768 78 void Monophonic::set_vfo_duty_cycle( float duty )
shorie 18:b9b1116f8768 79 {
shorie 18:b9b1116f8768 80 this->vfo->set_duty_cycle( duty );
shorie 18:b9b1116f8768 81 }
shorie 18:b9b1116f8768 82
shorie 18:b9b1116f8768 83 // VFO wave form
shorie 18:b9b1116f8768 84 void Monophonic::set_vfo_wave_form( wave_form form )
shorie 18:b9b1116f8768 85 {
shorie 18:b9b1116f8768 86 this->vfo->set_wave_form( form );
shorie 18:b9b1116f8768 87 }
shorie 22:dc2cbe8db9d9 88
shorie 22:dc2cbe8db9d9 89 // SVF filter mode.
shorie 22:dc2cbe8db9d9 90 void Monophonic::set_filter_mode( svf_mode mode )
shorie 22:dc2cbe8db9d9 91 {
shorie 22:dc2cbe8db9d9 92 this->sv_filter->set_mode( mode );
shorie 22:dc2cbe8db9d9 93 }
shorie 22:dc2cbe8db9d9 94
shorie 22:dc2cbe8db9d9 95 // SVF Q factor
shorie 22:dc2cbe8db9d9 96 void Monophonic::set_filter_Q( float Q )
shorie 22:dc2cbe8db9d9 97 {
shorie 22:dc2cbe8db9d9 98 this->sv_filter->set_Q( Q );
shorie 22:dc2cbe8db9d9 99 }
shorie 22:dc2cbe8db9d9 100
shorie 26:e99f71165e19 101 // Set the f_factor value.
shorie 22:dc2cbe8db9d9 102 void Monophonic::set_filter_f_factor( float f_factor )
shorie 22:dc2cbe8db9d9 103 {
shorie 22:dc2cbe8db9d9 104 this->sv_filter->set_f_factor( f_factor );
shorie 22:dc2cbe8db9d9 105 }
shorie 26:e99f71165e19 106
shorie 26:e99f71165e19 107 // Turn note on
shorie 26:e99f71165e19 108 void Monophonic::eg_on(void)
shorie 26:e99f71165e19 109 {
shorie 27:fcb1f1da2ad7 110 this->eg->on();
shorie 26:e99f71165e19 111 }
shorie 26:e99f71165e19 112
shorie 26:e99f71165e19 113 // Turn note off
shorie 26:e99f71165e19 114 void Monophonic::eg_off(void)
shorie 26:e99f71165e19 115 {
shorie 27:fcb1f1da2ad7 116 this->eg->off();
shorie 26:e99f71165e19 117 }
shorie 26:e99f71165e19 118
shorie 26:e99f71165e19 119 void Monophonic::set_eg_attack( float32_t attack )
shorie 26:e99f71165e19 120 {
shorie 27:fcb1f1da2ad7 121 this->eg->set_attack( attack );
shorie 26:e99f71165e19 122 }
shorie 26:e99f71165e19 123 void Monophonic::set_eg_decay( float32_t decay )
shorie 26:e99f71165e19 124 {
shorie 27:fcb1f1da2ad7 125 this->eg->set_decay( decay );
shorie 26:e99f71165e19 126 }
shorie 26:e99f71165e19 127
shorie 26:e99f71165e19 128 void Monophonic::set_eg_sustain( float32_t sustain )
shorie 26:e99f71165e19 129 {
shorie 27:fcb1f1da2ad7 130 this->eg->set_sustain( sustain );
shorie 26:e99f71165e19 131 }
shorie 26:e99f71165e19 132
shorie 26:e99f71165e19 133 void Monophonic::set_eg_release ( float32_t release )
shorie 26:e99f71165e19 134 {
shorie 27:fcb1f1da2ad7 135 this->eg->set_release( release );
shorie 26:e99f71165e19 136 }
shorie 26:e99f71165e19 137