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.h@15:de22b9d147e0, 2017-01-30 (annotated)

Committer:
shorie
Date:
Mon Jan 30 15:01:29 2017 +0000
Revision:
15:de22b9d147e0
Parent:
14:cec63d8da48c
Child:
16:d4ea3e6a0bce
Update VFO.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shorie 6:486b1cb03e61 1 #ifndef _SIGNAL_PROCESSING_H_
shorie 6:486b1cb03e61 2 #define _SIGNAL_PROCESSING_H_
shorie 6:486b1cb03e61 3
shorie 6:486b1cb03e61 4 #include "amakusa.h"
shorie 6:486b1cb03e61 5
shorie 14:cec63d8da48c 6 enum wave_style { triangle, square };
shorie 14:cec63d8da48c 7
shorie 14:cec63d8da48c 8 // User Signal processing Class
shorie 14:cec63d8da48c 9 class VFO {
shorie 14:cec63d8da48c 10 public:
shorie 14:cec63d8da48c 11 // essential members. Do not touch
shorie 14:cec63d8da48c 12 VFO( void );
shorie 14:cec63d8da48c 13 void run(
shorie 14:cec63d8da48c 14 float out_buffer[], // place to write the right output samples
shorie 14:cec63d8da48c 15 unsigned int block_size // block size [sample]
shorie 14:cec63d8da48c 16 );
shorie 14:cec63d8da48c 17
shorie 14:cec63d8da48c 18 // parameter settings
shorie 14:cec63d8da48c 19 void set_frequency( int freq ); // unit is Hz.
shorie 14:cec63d8da48c 20 void set_Fs( int Fs ); // unit is Hz.
shorie 14:cec63d8da48c 21 void set_duty_cycle( float duty ); // 0 ... 0.5
shorie 14:cec63d8da48c 22 void set_wave_style( wave_style style );
shorie 14:cec63d8da48c 23 private:
shorie 14:cec63d8da48c 24
shorie 14:cec63d8da48c 25 // internal variables..
shorie 14:cec63d8da48c 26 int frequency; // VFO frequency [Hz]
shorie 14:cec63d8da48c 27 int Fs; // sampling Frequency [Hz]
shorie 14:cec63d8da48c 28 float duty_cycle; // VFO duty cycle. 0 ... 0.5
shorie 14:cec63d8da48c 29 wave_style style; // style of the wave form.
shorie 15:de22b9d147e0 30 int current_phase; // internal variable of VFO.
shorie 15:de22b9d147e0 31 int half_way; // change point by duty cycle. ( period * duty_cycle ).
shorie 15:de22b9d147e0 32
shorie 15:de22b9d147e0 33 void update_parameter(); // call one of the parameter is changed.
shorie 14:cec63d8da48c 34 };
shorie 14:cec63d8da48c 35
shorie 14:cec63d8da48c 36
shorie 6:486b1cb03e61 37 // User Signal processing Class
shorie 6:486b1cb03e61 38 class SignalProcessing {
shorie 6:486b1cb03e61 39 public:
shorie 6:486b1cb03e61 40 // essential members. Do not touch
shorie 6:486b1cb03e61 41 SignalProcessing( unsigned int block_size );
shorie 6:486b1cb03e61 42 void run(
shorie 6:486b1cb03e61 43 float rx_left_buffer[], // array of the left input samples
shorie 6:486b1cb03e61 44 float rx_right_buffer[], // array of the right input samples
shorie 6:486b1cb03e61 45 float tx_left_buffer[], // place to write the left output samples
shorie 13:b33cb5925113 46 float tx_right_buffer[], // place to write the right output samples
shorie 6:486b1cb03e61 47 unsigned int block_size // block size [sample]
shorie 6:486b1cb03e61 48 );
shorie 6:486b1cb03e61 49
shorie 6:486b1cb03e61 50 // project depenedent members.
shorie 6:486b1cb03e61 51 void set_volume( float vol );
shorie 14:cec63d8da48c 52 void set_Fs( int Fs ); // unit is Hz.
shorie 15:de22b9d147e0 53 void set_vfo_frequency( int freq ); // unit is Hz.
shorie 15:de22b9d147e0 54 void set_vfo_duty_cycle( float duty ); // 0 ... 0.5
shorie 15:de22b9d147e0 55 void set_vfo_wave_style( wave_style style );
shorie 6:486b1cb03e61 56 private:
shorie 6:486b1cb03e61 57 // essential members. Do not touch.
shorie 6:486b1cb03e61 58 void enter_critical_section(void);
shorie 6:486b1cb03e61 59 void leave_critical_section(void);
shorie 6:486b1cb03e61 60
shorie 6:486b1cb03e61 61 // project dependent members.
shorie 14:cec63d8da48c 62 float volume_level; // 0 ... 1.0
shorie 14:cec63d8da48c 63 VFO *vfo;
shorie 6:486b1cb03e61 64 };
shorie 6:486b1cb03e61 65
shorie 6:486b1cb03e61 66 #endif