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。

signal_processing.cpp@28:547f19ed6f67, 2017-02-11 (annotated)

Committer:
shorie
Date:
Sat Feb 11 07:44:56 2017 +0000
Revision:
28:547f19ed6f67
Parent:
26:e99f71165e19 
13 tone is ready to play

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shorie 6:486b1cb03e61 1 #include "signal_processing.h"
shorie 6:486b1cb03e61 2
shorie 10:a00c73efc6c3 3 /*========================= Project Dependent Method =========================*/
shorie 10:a00c73efc6c3 4 // Modify this constructor to initialize your audio algorithm.
shorie 6:486b1cb03e61 5 SignalProcessing::SignalProcessing( unsigned int block_size )
shorie 6:486b1cb03e61 6 {
shorie 6:486b1cb03e61 7 // place the signal processing initializing code here.
shorie 6:486b1cb03e61 8 this->volume_level = 0.0; // sample initializaiton
shorie 18:b9b1116f8768 9 this->note = new Monophonic(block_size); // allocate VFO
shorie 18:b9b1116f8768 10 note->set_Fs( SAMPLING_FREQUENCY );
shorie 18:b9b1116f8768 11 note->set_vfo_frequency( 440 );
shorie 18:b9b1116f8768 12 note->set_vfo_wave_form( triangle );
shorie 10:a00c73efc6c3 13 } // End of constructor()
shorie 6:486b1cb03e61 14
shorie 10:a00c73efc6c3 15
shorie 10:a00c73efc6c3 16 // Modify this method to implement your audio algorithm.
shorie 6:486b1cb03e61 17 void SignalProcessing::run(
shorie 6:486b1cb03e61 18 float rx_left_buffer[], // array of the left input samples
shorie 6:486b1cb03e61 19 float rx_right_buffer[], // array of the right input samples
shorie 6:486b1cb03e61 20 float tx_left_buffer[], // place to write the left output samples
shorie 13:b33cb5925113 21 float tx_right_buffer[], // place to write the right output samples
shorie 6:486b1cb03e61 22 unsigned int block_size // block size [sample]
shorie 6:486b1cb03e61 23 )
shorie 6:486b1cb03e61 24 {
shorie 6:486b1cb03e61 25 // place the signal processing coce here
shorie 14:cec63d8da48c 26
shorie 14:cec63d8da48c 27 // VFO
shorie 26:e99f71165e19 28 this->note->run( tx_left_buffer);
shorie 14:cec63d8da48c 29
shorie 14:cec63d8da48c 30 // apply gain and copy to right ch.
shorie 6:486b1cb03e61 31 for ( int i= 0; i< block_size; i++ )
shorie 6:486b1cb03e61 32 {
shorie 14:cec63d8da48c 33 tx_right_buffer[i] = tx_left_buffer[i] *= this->volume_level;
shorie 6:486b1cb03e61 34 }
shorie 10:a00c73efc6c3 35 } // End of run()
shorie 10:a00c73efc6c3 36
shorie 14:cec63d8da48c 37
shorie 15:de22b9d147e0 38 // Sampling Frequency
shorie 14:cec63d8da48c 39 void SignalProcessing::set_Fs( int Fs )
shorie 14:cec63d8da48c 40 {
shorie 15:de22b9d147e0 41 this->enter_critical_section(); // forbidden interrrupt.
shorie 18:b9b1116f8768 42 this->note->set_Fs( Fs );
shorie 15:de22b9d147e0 43 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 44 }
shorie 14:cec63d8da48c 45
shorie 15:de22b9d147e0 46 // Oscillation Frequency
shorie 28:547f19ed6f67 47 void SignalProcessing::set_vfo_frequency( float freq )
shorie 14:cec63d8da48c 48 {
shorie 15:de22b9d147e0 49 this->enter_critical_section(); // forbidden interrrupt.
shorie 18:b9b1116f8768 50 this->note->set_vfo_frequency( freq );
shorie 15:de22b9d147e0 51 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 52 }
shorie 14:cec63d8da48c 53
shorie 15:de22b9d147e0 54 // Duty Cycle of VFO
shorie 15:de22b9d147e0 55 void SignalProcessing::set_vfo_duty_cycle( float duty )
shorie 14:cec63d8da48c 56 {
shorie 22:dc2cbe8db9d9 57 duty *= 0.5f; // [0.0,0.5]
shorie 15:de22b9d147e0 58 this->enter_critical_section(); // forbidden interrrupt.
shorie 18:b9b1116f8768 59 this->note->set_vfo_duty_cycle( duty );
shorie 15:de22b9d147e0 60 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 61 }
shorie 14:cec63d8da48c 62
shorie 18:b9b1116f8768 63 // VFO wave form
shorie 18:b9b1116f8768 64 void SignalProcessing::set_vfo_wave_form( wave_form form )
shorie 14:cec63d8da48c 65 {
shorie 15:de22b9d147e0 66 this->enter_critical_section(); // forbidden interrrupt.
shorie 18:b9b1116f8768 67 this->note->set_vfo_wave_form( form );
shorie 15:de22b9d147e0 68 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 69 }
shorie 14:cec63d8da48c 70
shorie 6:486b1cb03e61 71
shorie 15:de22b9d147e0 72 // Set the volume level to the object.
shorie 6:486b1cb03e61 73 void SignalProcessing::set_volume( float vol )
shorie 6:486b1cb03e61 74 {
shorie 6:486b1cb03e61 75 this->enter_critical_section(); // forbidden interrrupt.
shorie 6:486b1cb03e61 76 this->volume_level = vol;
shorie 6:486b1cb03e61 77 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 6:486b1cb03e61 78 }
shorie 6:486b1cb03e61 79
shorie 22:dc2cbe8db9d9 80 // Set the lpf/hpf/bpf
shorie 22:dc2cbe8db9d9 81 void SignalProcessing::set_filter_mode( svf_mode mode )
shorie 22:dc2cbe8db9d9 82 {
shorie 22:dc2cbe8db9d9 83 this->enter_critical_section(); // forbidden interrrupt.
shorie 22:dc2cbe8db9d9 84 this->note->set_filter_mode( mode );
shorie 22:dc2cbe8db9d9 85 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 22:dc2cbe8db9d9 86 }
shorie 6:486b1cb03e61 87
shorie 22:dc2cbe8db9d9 88 // Set the Q value.
shorie 22:dc2cbe8db9d9 89 void SignalProcessing::set_filter_Q( float Q )
shorie 22:dc2cbe8db9d9 90 {
shorie 22:dc2cbe8db9d9 91 // range of the parameter Q ( volume input ) is [0,1.0].
shorie 22:dc2cbe8db9d9 92 // Transform it to [0.1,10]
shorie 22:dc2cbe8db9d9 93 Q *= 9.9f;
shorie 22:dc2cbe8db9d9 94 Q += 0.1f;
shorie 22:dc2cbe8db9d9 95
shorie 22:dc2cbe8db9d9 96 this->enter_critical_section(); // forbidden interrrupt.
shorie 22:dc2cbe8db9d9 97 this->note->set_filter_Q( Q );
shorie 22:dc2cbe8db9d9 98 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 22:dc2cbe8db9d9 99 }
shorie 22:dc2cbe8db9d9 100
shorie 22:dc2cbe8db9d9 101 // Set the f_factor value.
shorie 22:dc2cbe8db9d9 102 void SignalProcessing::set_filter_f_factor( float f_factor )
shorie 22:dc2cbe8db9d9 103 {
shorie 22:dc2cbe8db9d9 104 // range of the parameter f_factor ( volume input ) is [0,1.0].
shorie 22:dc2cbe8db9d9 105 // Transform it to [0.1,5.0]
shorie 22:dc2cbe8db9d9 106 f_factor *= 4.9f;
shorie 22:dc2cbe8db9d9 107 f_factor += 0.1f;
shorie 22:dc2cbe8db9d9 108
shorie 22:dc2cbe8db9d9 109 this->enter_critical_section(); // forbidden interrrupt.
shorie 22:dc2cbe8db9d9 110 this->note->set_filter_f_factor( f_factor );
shorie 22:dc2cbe8db9d9 111 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 22:dc2cbe8db9d9 112 }
shorie 6:486b1cb03e61 113
shorie 26:e99f71165e19 114 void SignalProcessing::eg_on(void)
shorie 26:e99f71165e19 115 {
shorie 26:e99f71165e19 116 this->enter_critical_section(); // forbidden interrrupt.
shorie 26:e99f71165e19 117 this->note->eg_on();
shorie 26:e99f71165e19 118 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 26:e99f71165e19 119 }
shorie 26:e99f71165e19 120
shorie 26:e99f71165e19 121 void SignalProcessing::eg_off(void)
shorie 26:e99f71165e19 122 {
shorie 26:e99f71165e19 123 this->enter_critical_section(); // forbidden interrrupt.
shorie 26:e99f71165e19 124 this->note->eg_off();
shorie 26:e99f71165e19 125 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 26:e99f71165e19 126 }
shorie 26:e99f71165e19 127
shorie 26:e99f71165e19 128 void SignalProcessing::set_eg_attack( float32_t attack )
shorie 26:e99f71165e19 129 {
shorie 26:e99f71165e19 130 this->enter_critical_section(); // forbidden interrrupt.
shorie 26:e99f71165e19 131 this->note->set_eg_attack( attack );
shorie 26:e99f71165e19 132 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 26:e99f71165e19 133 }
shorie 26:e99f71165e19 134
shorie 26:e99f71165e19 135 void SignalProcessing::set_eg_decay( float32_t decay )
shorie 26:e99f71165e19 136 {
shorie 26:e99f71165e19 137 this->enter_critical_section(); // forbidden interrrupt.
shorie 26:e99f71165e19 138 this->note->set_eg_decay( decay );
shorie 26:e99f71165e19 139 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 26:e99f71165e19 140 }
shorie 26:e99f71165e19 141
shorie 26:e99f71165e19 142 void SignalProcessing::set_eg_sustain( float32_t sustain ) // [0,1.0]
shorie 26:e99f71165e19 143 {
shorie 26:e99f71165e19 144 this->enter_critical_section(); // forbidden interrrupt.
shorie 26:e99f71165e19 145 this->note->set_eg_sustain( sustain );
shorie 26:e99f71165e19 146 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 26:e99f71165e19 147 }
shorie 26:e99f71165e19 148
shorie 26:e99f71165e19 149 void SignalProcessing::set_eg_release ( float32_t release ) // [0,1.0]
shorie 26:e99f71165e19 150 {
shorie 26:e99f71165e19 151 this->enter_critical_section(); // forbidden interrrupt.
shorie 26:e99f71165e19 152 this->note->set_eg_release( release );
shorie 26:e99f71165e19 153 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 26:e99f71165e19 154 }
shorie 26:e99f71165e19 155
shorie 26:e99f71165e19 156
shorie 26:e99f71165e19 157
shorie 26:e99f71165e19 158
shorie 10:a00c73efc6c3 159 /************************** skeleton dependent methond. ***********************/
shorie 6:486b1cb03e61 160 // essential members. Do not touch.
shorie 6:486b1cb03e61 161 void SignalProcessing::enter_critical_section(void)
shorie 6:486b1cb03e61 162 {
shorie 6:486b1cb03e61 163 __disable_irq(); // globaly forbid all interrupt
shorie 6:486b1cb03e61 164 }
shorie 6:486b1cb03e61 165
shorie 6:486b1cb03e61 166 void SignalProcessing::leave_critical_section(void)
shorie 6:486b1cb03e61 167 {
shorie 6:486b1cb03e61 168 __enable_irq(); // globaly allow all interrupts
shorie 6:486b1cb03e61 169 }
shorie 6:486b1cb03e61 170