/*
   MicroDexed

   MicroDexed is a port of the Dexed sound engine
   (https://github.com/asb2m10/dexed) for the Teensy-3.5/3.6 with audio shield.
   Dexed ist heavily based on https://github.com/google/music-synthesizer-for-android

   (c)2018,2019 H. Wirtz <wirtz@parasitstudio.de>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

*/

#ifndef CONFIG_H_INCLUDED
#define CONFIG_H_INCLUDED

#include <Arduino.h>
#include "midinotes.h"

// ATTENTION! For better latency you have to redefine AUDIO_BLOCK_SAMPLES from
// 128 to 64 in <ARDUINO-IDE-DIR>/cores/teensy3/AudioStream.h

// If you want to test the system with Linux and withous any keyboard and/or audio equipment, you can do the following:
// 1. In Arduino-IDE enable "Tools->USB-Type->Serial + MIDI + Audio"
// 2. Build the firmware with "MIDI_DEVICE_USB" enabled in config.h.
// 3. Afterconnecting to a Linux system there should be a MIDI an audio device available that is called "MicroMDexed", so you can start the following:
// $ aplaymidi -p 20:0 <MIDI-File> # e.g. test.mid
// $ arecord -f cd -Dhw:1,0 /tmp/bla.wav

#define VERSION "0.9.8"

//*************************************************************************************************
//* DEVICE SETTINGS
//*************************************************************************************************

//*************************************************************************************************
//* MIDI HARDWARE SETTINGS
//*************************************************************************************************
#define MIDI_DEVICE_DIN Serial1
#define MIDI_DEVICE_USB 1
#define MIDI_DEVICE_USB_HOST 1

//*************************************************************************************************
//* AUDIO HARDWARE SETTINGS
//*************************************************************************************************
// If nothing is defined Teensy internal DAC is used as audio output device!
// Left and right channel audio signal is presented on pins A21 and A22.
#define AUDIO_DEVICE_USB
//#define TEENSY_DAC
//#define TEENSY_DAC_SYMMETRIC
//#define TEENSY_AUDIO_BOARD
//#define I2S_AUDIO_ONLY
//#define TGA_AUDIO_BOARD
#define PT8211_AUDIO

//*************************************************************************************************
//* MIDI SOFTWARE SETTINGS
//*************************************************************************************************
#define DEFAULT_MIDI_CHANNEL MIDI_CHANNEL_OMNI
#define MIDI_MERGE_THRU 1
#define SYSEXBANK_DEFAULT 0
#define SYSEXSOUND_DEFAULT 0

//*************************************************************************************************
//* DEXED AND EFECTS SETTINGS
//*************************************************************************************************
#define DEXED_ENGINE DEXED_ENGINE_MODERN // DEXED_ENGINE_MARKI // DEXED_ENGINE_OPL

// CHORUS parameters
#define MOD_DELAY_SAMPLE_BUFFER int32_t(TIME_MS2SAMPLES(20.0)) // 20.0 ms delay buffer. 
#define MOD_WAVEFORM WAVEFORM_TRIANGLE // WAVEFORM_SINE WAVEFORM_TRIANGLE WAVEFORM_SAWTOOTH WAVEFORM_SAWTOOTH_REVERSE
#define MOD_FILTER_OUTPUT MOD_LINKWITZ_RILEY_FILTER_OUTPUT // MOD_LINKWITZ_RILEY_FILTER_OUTPUT MOD_BUTTERWORTH_FILTER_OUTPUT MOD_NO_FILTER_OUTPUT
#define MOD_FILTER_CUTOFF_HZ 3000
#define USE_REVERB 1

//*************************************************************************************************
//* AUDIO SOFTWARE SETTINGS
//*************************************************************************************************
#ifndef TEENSY_AUDIO_BOARD
#if AUDIO_BLOCK_SAMPLES == 64
#define AUDIO_MEM 450
#else
#define AUDIO_MEM 225
#endif
#define REDUCE_LOUDNESS 1
#else // IF TEENSY_AUDIO_BOARD
#define SGTL5000_LINEOUT_LEVEL 29
#if AUDIO_BLOCK_SAMPLES == 64
#define AUDIO_MEM 900
#else
#define AUDIO_MEM 450
#endif
#define DELAY_MAX_TIME 600
#define REDUCE_LOUDNESS 1
#endif
#define DELAY_MAX_TIME 600
#define SAMPLE_RATE 44100
#define SOFTEN_VALUE_CHANGE_STEPS 5

//*************************************************************************************************
//* UI
//*************************************************************************************************
#define ENABLE_LCD_UI 1
#define STANDARD_LCD_I2C
//#define OLED_SPI

// LCD Display
//I2C_DISPLAY only
#ifdef STANDARD_LCD_I2C
#define LCD_I2C_ADDRESS 0x27
//#define LCD_I2C_ADDRESS 0x3f
//Display size, must be set for U8X8 as well
#define LCD_cols  16
#define LCD_rows  2
#define I2C_DISPLAY
// [I2C] SCL: Pin 19, SDA: Pin 18 (https://www.pjrc.com/teensy/td_libs_Wire.html)
//#define LCD_GFX 1
#endif

#ifdef OLED_SPI
#define LCD_cols  16
#define LCD_rows  4
//enable U8X8 support
#define U8X8_DISPLAY
//enable SPI CS switching
#define DISPLAY_LCD_SPI
#define U8X8_DISPLAY_CLASS U8X8_SSD1322_NHD_256X64_4W_HW_SPI
//#define U8X8_DISPLAY_CLASS U8X8_SSD1306_128X64_NONAME_HW_I2C
#define U8X8_CS_PIN 9
#define U8X8_DC_PIN 15
#define U8X8_RESET_PIN 14
#endif

#define CONTROL_RATE_MS 50
#define BACK_FROM_VOLUME_MS 1000

//*************************************************************************************************
//* DEBUG OUTPUT SETTINGS
//*************************************************************************************************
#define DEBUG 1
//#define SERIAL_SPEED 230400
#define SERIAL_SPEED 9600
#define SHOW_XRUN 1
#define SHOW_CPU_LOAD_MSEC 5000

//*************************************************************************************************
//* HARDWARE SETTINGS
//*************************************************************************************************
#if defined(__IMXRT1062__) //Teensy-4.0
#define TEENSY4
#endif

// Teensy Audio Shield (not used)
//#define SDCARD_CS_PIN    10
//#define SDCARD_MOSI_PIN  7
//#define SDCARD_SCK_PIN   14
#ifndef TEENSY4
// Teensy 3.5 & 3.6 SD card
#define SDCARD_CS_PIN    BUILTIN_SDCARD
#define SDCARD_MOSI_PIN  11
#define SDCARD_SCK_PIN   13
#else
#define SDCARD_CS_PIN    10
#define SDCARD_MOSI_PIN  11
#define SDCARD_SCK_PIN   13
#endif

// Encoder with button
#define ENCODER_USE_INTERRUPTS
#define NUM_ENCODER 2
#define ENC_L_PIN_A  3
#define ENC_L_PIN_B  2
#define BUT_L_PIN    4
#ifndef TEENSY4
#define ENC_R_PIN_A  28
#define ENC_R_PIN_B  29
#define BUT_R_PIN    30
#else
#define ENC_R_PIN_A  6
#define ENC_R_PIN_B  5
#define BUT_R_PIN    8
#endif
#define BUT_DEBOUNCE_MS 20
#define LONG_BUTTON_PRESS 500

// Internal timer
#define AUTOSTORE_MS 5000
#define VOICE_SELECTION_MS 2000

// EEPROM address
#define EEPROM_START_ADDRESS 100

#define MAX_BANKS 100
#define MAX_VOICES 32 // voices per bank
#define BANK_NAME_LEN 13 // FAT12 filenames (plus '\0')
#define VOICE_NAME_LEN 11 // 10 (plus '\0')

//*************************************************************************************************
//* DO NO CHANGE ANYTHING BEYOND IF YOU DON'T KNOW WHAT YOU ARE DOING !!!
//*************************************************************************************************
#define NUM_DEXED 1

enum { DEXED, REVERB, DELAY, CHORUS };

// MIDI
#ifdef MIDI_DEVICE_USB
#define USBCON 1
#endif

#if defined(__IMXRT1062__) //Teensy-4.0
#undef MIDI_DEVICE_USB
#define MAX_NOTES 16
#endif

#if defined(__MK66FX1M0__) // Teensy-3.6
// Teensy-3.6 settings
#define MIDI_DEVICE_USB_HOST 1
#if defined(USE_REVERB)
#define MAX_NOTES 12
#else
#define MAX_NOTES 16
#endif
#endif

#if defined (__MK64FX512__)
// Teensy-3.5 settings
#undef MIDI_DEVICE_USB_HOST
#define MAX_NOTES 11
#undef USE_REVERB
#endif

#define TRANSPOSE_FIX 24

// Audio
#ifdef TGA_AUDIO_BOARD
#define REDUCE_LOUDNESS 2
#endif

// Some optimizations
#define USE_TEENSY_DSP 1

// HELPER MACROS
#define TIME_MS2SAMPLES(x) floor(uint32_t(x) * AUDIO_SAMPLE_RATE / 1000)
#define SAMPLES2TIME_MS(x) float(uint32_t(x) * 1000 / AUDIO_SAMPLE_RATE)
// Modulated delay options
#define MOD_NO_FILTER_OUTPUT 0
#define MOD_BUTTERWORTH_FILTER_OUTPUT 1
#define MOD_LINKWITZ_RILEY_FILTER_OUTPUT 2

#if defined(TEENSY_DAC_SYMMETRIC)
#define MONO_MIN 1
#define MONO_MAX 1
#define MONO_DEFAULT 1
#else
#define MONO_MIN 0
#define MONO_MAX 3
#define MONO_DEFAULT 0
#endif

#define VOLUME_MIN 0
#define VOLUME_MAX 100
#define VOLUME_DEFAULT 80
#define VOLUME_ENC_STEPS 20

#define PANORAMA_MIN -20
#define PANORAMA_MAX 20
#define PANORAMA_DEFAULT 0

#define MIDI_CHANNEL_MIN MIDI_CHANNEL_OMNI
#define MIDI_CHANNEL_MAX 16
#define MIDI_CHANNEL_DEFAULT MIDI_CHANNEL_OMNI

#define REVERB_ROOMSIZE_MIN 0
#define REVERB_ROOMSIZE_MAX 100
#define REVERB_ROOMSIZE_DEFAULT 0

#define REVERB_DAMPING_MIN 0
#define REVERB_DAMPING_MAX 100
#define REVERB_DAMPING_DEFAULT 0

#define REVERB_SEND_MIN 0
#define REVERB_SEND_MAX 100
#define REVERB_SEND_DEFAULT 0

#define CHORUS_FREQUENCY_MIN 0
#define CHORUS_FREQUENCY_MAX 100
#define CHORUS_FREQUENCY_DEFAULT 0

#define CHORUS_WAVEFORM_MIN 0
#define CHORUS_WAVEFORM_MAX 1
#define CHORUS_WAVEFORM_DEFAULT 0

#define CHORUS_DEPTH_MIN 0
#define CHORUS_DEPTH_MAX 100
#define CHORUS_DEPTH_DEFAULT 0

#define CHORUS_SEND_MIN 0
#define CHORUS_SEND_MAX 100
#define CHORUS_SEND_DEFAULT 0

#define DELAY_TIME_MIN 0
#define DELAY_TIME_MAX DELAY_MAX_TIME
#define DELAY_TIME_DEFAULT 0

#define DELAY_FEEDBACK_MIN 0
#define DELAY_FEEDBACK_MAX 100
#define DELAY_FEEDBACK_DEFAULT 0

#define DELAY_SEND_MIN 0
#define DELAY_SEND_MAX 100
#define DELAY_SEND_DEFAULT 0

#define FILTER_CUTOFF_MIN 0
#define FILTER_CUTOFF_MAX 100
#define FILTER_CUTOFF_DEFAULT 100

#define FILTER_RESONANCE_MIN 0
#define FILTER_RESONANCE_MAX 100
#define FILTER_RESONANCE_DEFAULT 100

#define LOUDNESS_MIN 0
#define LOUDNESS_MAX 100
#define LOUDNESS_DEFAULT 100

#define POLYPHONY_MIN 1
#define POLYPHONY_MAX MAX_NOTES
#define POLYPHONY_DEFAULT MAX_NOTES

#define ENGINE_MIN 0
#define ENGINE_MAX 2
#define ENGINE_DEFAULT 0

#define MONOPOLY_MIN 0
#define MONOPOLY_MAX 1
#define MONOPOLY_DEFAULT 1

#define PB_RANGE_MIN 0
#define PB_RANGE_MAX 12
#define PB_RANGE_DEFAULT 1

#define PB_STEP_MIN 0
#define PB_STEP_MAX 12
#define PB_STEP_DEFAULT 1

#define MW_RANGE_MIN 0
#define MW_RANGE_MAX 99
#define MW_RANGE_DEFAULT 50

#define MW_ASSIGN_MIN 0
#define MW_ASSIGN_MAX 7
#define MW_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define FC_RANGE_MIN 0
#define FC_RANGE_MAX 99
#define FC_RANGE_DEFAULT 50

#define FC_ASSIGN_MIN 0
#define FC_ASSIGN_MAX 7
#define FC_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define BC_RANGE_MIN 0
#define BC_RANGE_MAX 99
#define BC_RANGE_DEFAULT 50

#define BC_ASSIGN_MIN 0
#define BC_ASSIGN_MAX 7
#define BC_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define AT_RANGE_MIN 0
#define AT_RANGE_MAX 99
#define AT_RANGE_DEFAULT 50

#define AT_ASSIGN_MIN 0
#define AT_ASSIGN_MAX 7
#define AT_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define OP_ENABLED_DEFAULT 0x3f

#define PORTAMENTO_MODE_MIN 0
#define PORTAMENTO_MODE_MAX 1
#define PORTAMENTO_MODE_DEFAULT 0 // 0: Retain, 1: Follow

#define PORTAMENTO_GLISS_MIN 0
#define PORTAMENTO_GLISS_MAX 1
#define PORTAMENTO_GLISS_DEFAULT 0

#define PORTAMENTO_TIME_MIN 0
#define PORTAMENTO_TIME_MAX 99
#define PORTAMENTO_TIME_DEFAULT 50

#define INSTANCES_MIN 1
#define INSTANCES_MAX NUM_DEXED
#define INSTANCES_DEFAULT 1

#define INSTANCE_MODE_MIN 0
#define INSTANCE_MODE_MAX 1
#define INSTANCE_MODE_DEFAULT 0

#define INSTANCE_SPLITPOINT_MIN MIDI_AIS0
#define INSTANCE_SPLITPOINT_MAX MIDI_B7
#define INSTANCE_SPLITPOINT_DEFAULT MIDI_C3

//
typedef struct {
  uint8_t midi_channel;
  uint8_t bank;
  uint8_t voice;
  uint8_t reverb_send;
  uint8_t chorus_send;
  uint8_t delay_send;
  uint8_t filter_cutoff;
  uint8_t filter_resonance;
  uint8_t loudness;
  uint8_t polyphony;
  uint8_t engine;
  uint8_t monopoly;
  uint8_t pb_range;
  uint8_t pb_step;
  uint8_t mw_range;
  uint8_t mw_assign;
  uint8_t fc_range;
  uint8_t fc_assign;
  uint8_t bc_range;
  uint8_t bc_assign;
  uint8_t at_range;
  uint8_t at_assign;
  uint8_t op_enabled;
} dexed_t;

// struct for holding the current configuration
typedef struct {
  uint32_t checksum;
  uint8_t instances;
  uint8_t instance_mode;
  uint8_t instance_splitpoint;
  uint8_t vol;
  int8_t pan;
  uint8_t mono;
  uint8_t reverb_roomsize;
  uint8_t reverb_damping;
  uint8_t chorus_frequency;
  uint8_t chorus_waveform;
  uint8_t chorus_depth;
  uint8_t delay_time;
  uint8_t delay_feedback;
  dexed_t dexed[NUM_DEXED];
} config_t;

inline float mapfloat(float val, float in_min, float in_max, float out_min, float out_max)
{
  return (val - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

#endif // CONFIG_H_INCLUDED