wirtz
/
MicroMDAEPiano
mirror of https://codeberg.org/dcoredump/MicroMDAEPiano.git
1
0
Fork 0
Code Issues Releases Wiki Activity

Trying to fix interpolation problems...

Browse Source
master
Holger Wirtz 6 years ago
parent a48f996232
commit 369b135c8f
4 changed files with 53 additions and 80 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 53
      MicroMDAEPiano.ino
  2. 4
      UI.hpp
  3. 2
      config.h
  4. 64
      effect_modulated_chorus.cpp

53
MicroMDAEPiano.ino
Unescape View File

@ -140,7 +140,7 @@ config_t configuration = {
ENC_MIDI_CHANNEL_DEFAULT, // midi_channel
ENC_MIDI_SOFT_THRU_DEFAULT, // midi_soft_thru
ENC_MAX_POLY_DEFAULT, // max_poly
0 // pan
ENC_MASTER_PAN_DEFAULT // pan
};
uint8_t master_volume = ENC_MASTER_VOLUME_DEFAULT;
@ -183,7 +183,7 @@ void setup()
// create EPiano object
ep = new mdaEPiano();
set_complete_configuration();
//set_complete_configuration();
initial_values_from_eeprom();
setup_midi_devices();
@ -543,57 +543,24 @@ void config_from_eeprom(void)
if (checksum == tmp_conf.checksum)
{
EEPROM_readAnything(EEPROM_CONFIGURATIONS + sizeof(config_t) * (sound - 1), configuration);
Serial.print(F(" - OK, loading config "));
Serial.print(F(" - OK -> loading sound."));
Serial.print(sound, DEC);
}
else
#ifdef DEBUG
{
Serial.println(F(" - mismatch (or force) -> nothing done!"));
#ifdef DEBUG
Serial.println(F(" - mismatch -> loading initial configuration."));
#endif
set_complete_configuration();
}
show_sound();
#endif
}
void initial_values_from_eeprom(void)
{
uint32_t checksum;
config_t tmp_conf;
EEPROM_readAnything(EEPROM_CONFIGURATIONS + sizeof(config_t) * (sound - 1), tmp_conf);
checksum = crc32((byte*)&tmp_conf + 4, sizeof(tmp_conf) - 4);
#ifdef DEBUG
Serial.print(F("EEPROM checksum: 0x"));
Serial.print(tmp_conf.checksum, HEX);
Serial.print(F(" / 0x"));
Serial.print(checksum, HEX);
#endif
if (checksum != tmp_conf.checksum || (but[0].read() == LOW && but[1].read() == LOW))
{
#ifdef DEBUG
Serial.println(F(" - mismatch (or force) -> initializing EEPROM!"));
#endif
eeprom_config_update_flag = sound;
eeprom_config_update();
}
else
{
sound = EEPROM.read(EEPROM_SOUND);
master_volume = EEPROM.read(EEPROM_MASTER_VOLUME);
EEPROM_readAnything(EEPROM_CONFIGURATIONS + sizeof(config_t) * (sound - 1), configuration);
Serial.print(F(" - OK, loading"));
}
#ifdef DEBUG
Serial.print(F(" - Master volume: "));
Serial.print(master_volume, DEC);
Serial.print(F(" - Sound: "));
Serial.println(sound, DEC);
Serial.print(F("Max configs in EEPROM: "));
Serial.println(MAX_SOUNDS);
show_sound();
#endif
sound = EEPROM.read(EEPROM_SOUND);
load_sound();
}
void eeprom_config_write(uint8_t value)
@ -726,7 +693,7 @@ void show_sound(void)
Serial.println(configuration.reverb_damping, DEC);
Serial.print(F("Reverb Level: "));
Serial.println(configuration.reverb_level, DEC);
Serial.print(F("CHorus Frequency: "));
Serial.print(F("Chorus Frequency: "));
Serial.println(configuration.chorus_frequency, DEC);
Serial.print(F("Chorus Delay: "));
Serial.println(configuration.chorus_delay, DEC);

4
UI.hpp
Unescape View File

@ -36,7 +36,7 @@
const uint8_t MAX_SCREENS = 14; ///< @note Default: 14
/// Configures the number of available menus per menus system.
const uint8_t MAX_MENUS = 43; ///< @note Default: 8
const uint8_t MAX_MENUS = 44; ///< @note Default: 8
*/
@ -55,7 +55,7 @@ int32_t encoder_value[NUM_ENCODER];
Bounce but[NUM_ENCODER] = {Bounce(BUT_L_PIN, BUT_DEBOUNCE_MS), Bounce(BUT_R_PIN, BUT_DEBOUNCE_MS)};
elapsedMillis back_to_main;
#define NUM_MENUS 41
#define NUM_MENUS 42
#define MAIN 0
/*************************************/

2
config.h
Unescape View File

@ -62,7 +62,7 @@
#define USE_XFADE_DATA 1
// CHORUS parameters
#define INTERPOLATION_WINDOW_SIZE 7 // For chorus, only odd numbers,please!
#define INTERPOLATE CUBIC // LINEAR COSINE LAGRANGE QUADRATIC
#define INTERPOLATE QUADRATIC // LINEAR COSINE QUADRATIC CUBIC LAGRANGE
#define CHORUS_WAVEFORM WAVEFORM_TRIANGLE // WAVEFORM_SINE WAVEFORM_SAWTOOTH WAVEFORM_SAWTOOTH_REVERSE WAVEFORM_SQUARE WAVEFORM_TRIANGLE
#define CHORUS_DELAY_LENGTH (16*AUDIO_BLOCK_SAMPLES)

64
effect_modulated_chorus.cpp
Unescape View File

@ -70,6 +70,11 @@ void AudioModulatedEffectChorus::update(void)
short *mp;
float mod_idx;
#ifdef INTERPOLATE
interpolation* modulation_interpolate;
modulation_interpolate = new interpolation;
#endif
if (l_delayline == NULL)
return;
@ -81,8 +86,11 @@ void AudioModulatedEffectChorus::update(void)
#ifdef INTERPOLATE
uint8_t j;
int16_t interpolation_idx;
interpolation modulation_interpolate;
modulation_interpolate.valuelenXY(INTERPOLATION_WINDOW_SIZE);
float x[INTERPOLATION_WINDOW_SIZE];
float y[INTERPOLATION_WINDOW_SIZE];
modulation_interpolate->valuelenXY(INTERPOLATION_WINDOW_SIZE);
modulation_interpolate->valueX(x);
modulation_interpolate->valueY(y);
#endif
bp = block->data;
@ -90,11 +98,6 @@ void AudioModulatedEffectChorus::update(void)
for (int i = 0; i < AUDIO_BLOCK_SAMPLES; i++)
{
#ifdef INTERPOLATE
float x[INTERPOLATION_WINDOW_SIZE];
float y[INTERPOLATION_WINDOW_SIZE];
#endif
// write data into circular buffer
if (l_circ_idx >= delay_length)
l_circ_idx = 0;
@ -102,45 +105,43 @@ void AudioModulatedEffectChorus::update(void)
// calculate modulation index
mod_idx = float(*mp) / SHRT_MAX * delay_length_half + l_circ_idx; // calculate index with modulation as a float
if (mod_idx > delay_length)
mod_idx = mod_idx - delay_length;
else if (mod_idx < 0)
mod_idx = delay_length + mod_idx;
if (mod_idx > float(delay_length - 1))
mod_idx = mod_idx - float(delay_length - 1);
else if (mod_idx < 0.0)
mod_idx = float(delay_length - 1) + mod_idx;
#ifdef INTERPOLATE
// get value with interpolation
for (j = 0; j < INTERPOLATION_WINDOW_SIZE; j++)
interpolation_idx = int(mod_idx + 0.5) + (INTERPOLATION_WINDOW_SIZE / -2);
for (j = interpolation_idx; j < INTERPOLATION_WINDOW_SIZE; j++)
{
interpolation_idx = mod_idx + (INTERPOLATION_WINDOW_SIZE / -2) + j;
if (interpolation_idx > delay_length)
interpolation_idx = interpolation_idx - delay_length;
else if (interpolation_idx < 0)
interpolation_idx = delay_length + interpolation_idx;
x[j] = interpolation_idx;
y[j] = l_delayline[interpolation_idx];
if (j >= delay_length)
y[j] = l_delayline[j - delay_length];
else if (j < 0)
y[j] = l_delayline[delay_length + j];
}
modulation_interpolate.valueX(x);
modulation_interpolate.valueY(y);
modulation_interpolate.valueI(mod_idx);
modulation_interpolate->valueI(mod_idx);
#if INTERPOLATE == CUBIC
*bp = int(modulation_interpolate.CubicInterpolate() + 0.5);
*bp = int(modulation_interpolate->CubicInterpolate() + 0.5);
#elif INTERPOLATE == LINEAR
*bp = int(modulation_interpolate.LinearInterpolate() + 0.5);
*bp = int(modulation_interpolate->LinearInterpolate() + 0.5);
#elif INTERPOLATE == COSINE
*bp = int(modulation_interpolate.CosineInterpolate() + 0.5);
*bp = int(modulation_interpolate->CosineInterpolate() + 0.5);
#elif INTERPOLATE == LAGRANGE
*bp = int(modulation_interpolate.LagrangeInterpolate() + 0.5);
*bp = int(modulation_interpolate->LagrangeInterpolate() + 0.5);
#elif INTERPOLATE == QUDRATIC
*bp = int(modulation_interpolate.QuadraticInterpolate() + 0.5);
*bp = int(modulation_interpolate->QuadraticInterpolate() + 0.5);
#else
// No interpolation - should sound really bad...
*bp = int(mod_idx + 0.5);
*bp = l_delayline[int(mod_idx + 0.5)];
#endif
#else
// No interpolation - should sound really bad...
*bp = int(mod_idx + 0.5);
*bp = l_delayline[int(mod_idx + 0.5)];
#endif
bp++;
@ -153,4 +154,9 @@ void AudioModulatedEffectChorus::update(void)
release(block);
release(modulation);
}
#ifdef INTERPOLATION
if (modulation_interpolate)
delete(modulation_interpolate);
#endif
}

Write Preview
Loading…
Cancel
Save