parent
2dd128532a
commit
af801cb02c
@ -0,0 +1,134 @@ |
||||
/* Audio Library for Teensy 3.X
|
||||
Copyright (c) 2014, Pete (El Supremo) |
||||
Copyright (c) 2019, Holger Wirtz |
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy |
||||
of this software and associated documentation files (the "Software"), to deal |
||||
in the Software without restriction, including without limitation the rights |
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
||||
copies of the Software, and to permit persons to whom the Software is |
||||
furnished to do so, subject to the following conditions: |
||||
|
||||
The above copyright notice and this permission notice shall be included in |
||||
all copies or substantial portions of the Software. |
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
||||
THE SOFTWARE. |
||||
*/ |
||||
|
||||
#include <Arduino.h> |
||||
#include "effect_modulated_chorus.h" |
||||
|
||||
/******************************************************************/ |
||||
|
||||
// Based on; A u d i o E f f e c t C h o r u s
|
||||
// Written by Pete (El Supremo) Jan 2014
|
||||
// 140529 - change to handle mono stream - change modify() to voices()
|
||||
// 140219 - correct storage class (not static)
|
||||
// 190527 - adding modulation input (by Holger Wirtz)
|
||||
|
||||
boolean AudioModulatedEffectChorus::begin(short *delayline, int d_length, int n_chorus) |
||||
{ |
||||
#if 0 |
||||
Serial.print("AudioModulatedEffectChorus.begin(Chorus delay line length = "); |
||||
Serial.print(d_length); |
||||
Serial.print(", n_chorus = "); |
||||
Serial.print(n_chorus); |
||||
Serial.println(")"); |
||||
#endif |
||||
|
||||
l_delayline = NULL; |
||||
delay_length = 0; |
||||
l_circ_idx = 0; |
||||
|
||||
if (delayline == NULL) { |
||||
return (false); |
||||
} |
||||
if (d_length < 10) { |
||||
return (false); |
||||
} |
||||
if (n_chorus < 1) { |
||||
return (false); |
||||
} |
||||
|
||||
l_delayline = delayline; |
||||
delay_length = d_length / 2; |
||||
num_chorus = n_chorus; |
||||
|
||||
return (true); |
||||
} |
||||
|
||||
void AudioModulatedEffectChorus::voices(int n_chorus) |
||||
{ |
||||
num_chorus = n_chorus; |
||||
} |
||||
|
||||
//int last_idx = 0;
|
||||
void AudioModulatedEffectChorus::update(void) |
||||
{ |
||||
audio_block_t *block; |
||||
audio_block_t *modulation; |
||||
short *bp; |
||||
int sum; |
||||
int c_idx; |
||||
|
||||
if (l_delayline == NULL)return; |
||||
|
||||
// do passthru
|
||||
// It stores the unmodified data in the delay line so that
|
||||
// it isn't as likely to click
|
||||
if (num_chorus <= 1) { |
||||
// Just passthrough
|
||||
block = receiveWritable(0); |
||||
if (block) { |
||||
bp = block->data; |
||||
for (int i = 0; i < AUDIO_BLOCK_SAMPLES; i++) { |
||||
l_circ_idx++; |
||||
if (l_circ_idx >= delay_length) { |
||||
l_circ_idx = 0; |
||||
} |
||||
l_delayline[l_circ_idx] = *bp++; |
||||
} |
||||
transmit(block, 0); |
||||
release(block); |
||||
} |
||||
return; |
||||
} |
||||
|
||||
// L E F T C H A N N E L
|
||||
|
||||
block = receiveWritable(0); |
||||
modulation = receiveReadOnly(1); |
||||
|
||||
if (block) { |
||||
bp = block->data; |
||||
uint32_t tmp = delay_length / (num_chorus - 1) - 1; |
||||
for (int i = 0; i < AUDIO_BLOCK_SAMPLES; i++) { |
||||
l_circ_idx++; |
||||
if (l_circ_idx >= delay_length) { |
||||
l_circ_idx = 0; |
||||
} |
||||
l_delayline[l_circ_idx] = *bp; |
||||
sum = 0; |
||||
c_idx = l_circ_idx; |
||||
for (int k = 0; k < num_chorus; k++) { |
||||
sum += l_delayline[c_idx]; |
||||
if (num_chorus > 1)c_idx -= tmp; |
||||
if (c_idx < 0) { |
||||
c_idx += delay_length; |
||||
} |
||||
} |
||||
*bp++ = sum / num_chorus; |
||||
} |
||||
|
||||
// transmit the block
|
||||
transmit(block, 0); |
||||
release(block); |
||||
release(modulation); |
||||
} |
||||
} |
||||
@ -0,0 +1,60 @@ |
||||
/* Audio Library for Teensy 3.X
|
||||
Copyright (c) 2014, Pete (El Supremo) |
||||
Copyright (c) 2019, Holger Wirtz |
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy |
||||
of this software and associated documentation files (the "Software"), to deal |
||||
in the Software without restriction, including without limitation the rights |
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
||||
copies of the Software, and to permit persons to whom the Software is |
||||
furnished to do so, subject to the following conditions: |
||||
|
||||
The above copyright notice and this permission notice shall be included in |
||||
all copies or substantial portions of the Software. |
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
||||
THE SOFTWARE. |
||||
*/ |
||||
|
||||
#ifndef effect_modulated_chorus_h_ |
||||
#define effect_modulated_chorus_h_ |
||||
|
||||
#include "Arduino.h" |
||||
#include "AudioStream.h" |
||||
|
||||
/******************************************************************/ |
||||
|
||||
// A u d i o E f f e c t C h o r u s
|
||||
// Written by Pete (El Supremo) Jan 2014
|
||||
// 140219 - correct storage class (not static)
|
||||
// 190527 - adding modulation input (by Holger Wirtz)
|
||||
|
||||
#define CHORUS_DELAY_PASSTHRU -1 |
||||
|
||||
class AudioModulatedEffectChorus : |
||||
public AudioStream |
||||
{ |
||||
public: |
||||
AudioModulatedEffectChorus(void): |
||||
AudioStream(2, inputQueueArray), num_chorus(2) |
||||
{ } |
||||
|
||||
boolean begin(short *delayline, int delay_length, int n_chorus); |
||||
virtual void update(void); |
||||
void voices(int n_chorus); |
||||
|
||||
private: |
||||
audio_block_t *inputQueueArray[2]; |
||||
|
||||
short *l_delayline; |
||||
short l_circ_idx; |
||||
int num_chorus; |
||||
int delay_length; |
||||
}; |
||||
|
||||
#endif |
||||
Loading…
Reference in new issue