Synthesizer based on the Unzen / Nucleo F746ZG
Dependencies: amakusa mbed-dsp mbed shimabara ukifune unzen_nucleo_f746
Fork of skeleton_unzen_nucleo_f746 by
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
- Committer:
- shorie
- Date:
- 2017-02-05
- Revision:
- 22:dc2cbe8db9d9
- Parent:
- 18:b9b1116f8768
- Child:
- 26:e99f71165e19
File content as of revision 22:dc2cbe8db9d9:
#include "signal_processing.h" /*========================= Project Dependent Method =========================*/ // Modify this constructor to initialize your audio algorithm. SignalProcessing::SignalProcessing( unsigned int block_size ) { // place the signal processing initializing code here. this->volume_level = 0.0; // sample initializaiton this->note = new Monophonic(block_size); // allocate VFO note->set_Fs( SAMPLING_FREQUENCY ); note->set_vfo_frequency( 440 ); note->set_vfo_wave_form( triangle ); } // End of constructor() // Modify this method to implement your audio algorithm. void SignalProcessing::run( float rx_left_buffer[], // array of the left input samples float rx_right_buffer[], // array of the right input samples float tx_left_buffer[], // place to write the left output samples float tx_right_buffer[], // place to write the right output samples unsigned int block_size // block size [sample] ) { // place the signal processing coce here // VFO this->note->run( tx_left_buffer, block_size); // apply gain and copy to right ch. for ( int i= 0; i< block_size; i++ ) { tx_right_buffer[i] = tx_left_buffer[i] *= this->volume_level; } } // End of run() // Sampling Frequency void SignalProcessing::set_Fs( int Fs ) { this->enter_critical_section(); // forbidden interrrupt. this->note->set_Fs( Fs ); this->leave_critical_section(); // now, ok to accept interrupt. } // Oscillation Frequency void SignalProcessing::set_vfo_frequency( int freq ) { this->enter_critical_section(); // forbidden interrrupt. this->note->set_vfo_frequency( freq ); this->leave_critical_section(); // now, ok to accept interrupt. } // Duty Cycle of VFO void SignalProcessing::set_vfo_duty_cycle( float duty ) { duty *= 0.5f; // [0.0,0.5] this->enter_critical_section(); // forbidden interrrupt. this->note->set_vfo_duty_cycle( duty ); this->leave_critical_section(); // now, ok to accept interrupt. } // VFO wave form void SignalProcessing::set_vfo_wave_form( wave_form form ) { this->enter_critical_section(); // forbidden interrrupt. this->note->set_vfo_wave_form( form ); this->leave_critical_section(); // now, ok to accept interrupt. } // Set the volume level to the object. void SignalProcessing::set_volume( float vol ) { this->enter_critical_section(); // forbidden interrrupt. this->volume_level = vol; this->leave_critical_section(); // now, ok to accept interrupt. } // Set the lpf/hpf/bpf void SignalProcessing::set_filter_mode( svf_mode mode ) { this->enter_critical_section(); // forbidden interrrupt. this->note->set_filter_mode( mode ); this->leave_critical_section(); // now, ok to accept interrupt. } // Set the Q value. void SignalProcessing::set_filter_Q( float Q ) { // range of the parameter Q ( volume input ) is [0,1.0]. // Transform it to [0.1,10] Q *= 9.9f; Q += 0.1f; this->enter_critical_section(); // forbidden interrrupt. this->note->set_filter_Q( Q ); this->leave_critical_section(); // now, ok to accept interrupt. } // Set the f_factor value. void SignalProcessing::set_filter_f_factor( float f_factor ) { // range of the parameter f_factor ( volume input ) is [0,1.0]. // Transform it to [0.1,5.0] f_factor *= 4.9f; f_factor += 0.1f; this->enter_critical_section(); // forbidden interrrupt. this->note->set_filter_f_factor( f_factor ); this->leave_critical_section(); // now, ok to accept interrupt. } /************************** skeleton dependent methond. ***********************/ // essential members. Do not touch. void SignalProcessing::enter_critical_section(void) { __disable_irq(); // globaly forbid all interrupt } void SignalProcessing::leave_critical_section(void) { __enable_irq(); // globaly allow all interrupts }