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MicroDexed
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Added dirkensteins@gitub floating point version of freeverb and exchanged the current patched version

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against the new one. Testing is currently needed.
pull/37/head
Holger Wirtz 4 years ago
parent 3265912921
commit 140c4adc69
5 changed files with 709 additions and 1 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 4
      MicroDexed.ino
  2. 4
      UI.hpp
  3. 3
      config.h
  4. 509
      effect_freeverbf.cpp
  5. 190
      effect_freeverbf.h

4
MicroDexed.ino
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@ -35,9 +35,13 @@
#include "effect_modulated_delay.h"
#include "effect_stereo_mono.h"
#include "effect_mono_stereo.h"
#ifdef FREEVERBF
#include "effect_freeverbf.h"
#else
#ifdef PATCHED_FREEVERB
#include "my_effect_freeverb.h"
#endif
#endif
#include "PluginFx.h"
#include "UI.hpp"
#include "source_microdexed.h"

4
UI.hpp
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@ -30,9 +30,13 @@
#include "Disp_Plus.h"
#include "effect_modulated_delay.h"
#include "effect_stereo_mono.h"
#ifdef FREEVERBF
#include "effect_freeverbf.h"
#else
#ifdef PATCHED_FREEVERB
#include "my_effect_freeverb.h"
#endif
#endif
#include "dexed.h"
#include <LCDMenuLib2.h>

3
config.h
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@ -115,7 +115,8 @@
#define MOD_FILTER_CUTOFF_HZ 2000
// REVERB parameters
#define REVERB_ANTIALIAS_FRQ 7500
#define PATCHED_FREEVERB 1
//#define PATCHED_FREEVERB 1
#define FREEVERBF 1
// ANTIALIAS frequency
//#define ANTIALIAS_FRQ 15000
// SGTL5000

509
effect_freeverbf.cpp
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@ -0,0 +1,509 @@
/* Audio Library for Teensy 3.X
* Copyright (c) 2018, Paul Stoffregen, paul@pjrc.com
*
* Development of this audio library was funded by PJRC.COM, LLC by sales of
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
* open source software by purchasing Teensy or other PJRC products.
*
* 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, development funding 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.
*/
// A Floating point implementation of Freeverb by Jezar at Dreampoint
// http://blog.bjornroche.com/2012/06/freeverb-original-public-domain-code-by.html
// https://music.columbia.edu/pipermail/music-dsp/2001-October/045433.html
#include <Arduino.h>
#include "effect_freeverbf.h"
#include "utility/dspinst.h"
AudioEffectFreeverbFloat::AudioEffectFreeverbFloat() : AudioStream(1, inputQueueArray)
{
for(unsigned int i = 0; i < sizeof(comb1buf)/sizeof(float); i++) comb1buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb2buf)/sizeof(float); i++) comb2buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb3buf)/sizeof(float); i++) comb3buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb4buf)/sizeof(float); i++) comb4buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb5buf)/sizeof(float); i++) comb5buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb6buf)/sizeof(float); i++) comb6buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb7buf)/sizeof(float); i++) comb7buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb8buf)/sizeof(float); i++) comb8buf[i] = 0.0;
comb1index = 0;
comb2index = 0;
comb3index = 0;
comb4index = 0;
comb5index = 0;
comb6index = 0;
comb7index = 0;
comb8index = 0;
comb1filter = 0.0;
comb2filter = 0.0;
comb3filter = 0.0;
comb4filter = 0.0;
comb5filter = 0.0;
comb6filter = 0.0;
comb7filter = 0.0;
comb8filter = 0.0;
combdamp1 = 6553.0;
combdamp2 = 26215.0;
combfeeback = 27524.0;
for(unsigned int i = 0; i < sizeof(allpass1buf)/sizeof(float); i++) allpass1buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass2buf)/sizeof(float); i++) allpass2buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass3buf)/sizeof(float); i++) allpass3buf[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass4buf)/sizeof(float); i++) allpass4buf[i] = 0.0;
allpass1index = 0;
allpass2index = 0;
allpass3index = 0;
allpass4index = 0;
}
#if 0
#define sat16i(n, rshift) signed_saturate_rshift((n), 16, (rshift))
#else
// cleaner sat16 by http://www.moseleyinstruments.com/
static int16_t sat16i(int32_t n, int rshift) {
// we should always round towards 0
// to avoid recirculating round-off noise
//
// a 2s complement positive number is always
// rounded down, so we only need to take
// care of negative numbers
if (n < 0) {
n = n + (~(0xFFFFFFFFUL << rshift));
}
n = n >> rshift;
if (n > 32767) {
return 32767;
}
if (n < -32768) {
return -32768;
}
return n;
}
#endif
/* static float sat16(float n, int rshift) {
// we should always round towards 0
// to avoid recirculating round-off noise
//
// a 2s complement positive number is always
// rounded down, so we only need to take
// care of negative numbers
n = n / (float) (1<<rshift);
return n;
} */
// TODO: move this to one of the data files, use in output_adat.cpp, output_tdm.cpp, etc
static const audio_block_t zeroblock = {
0, 0, 0, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#if AUDIO_BLOCK_SAMPLES > 16
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
#if AUDIO_BLOCK_SAMPLES > 32
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
#if AUDIO_BLOCK_SAMPLES > 48
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
#if AUDIO_BLOCK_SAMPLES > 64
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
#if AUDIO_BLOCK_SAMPLES > 80
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
#if AUDIO_BLOCK_SAMPLES > 96
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
#if AUDIO_BLOCK_SAMPLES > 112
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
#endif
} };
void AudioEffectFreeverbFloat::update()
{
#if defined(__ARM_ARCH_7EM__)
const audio_block_t *block;
audio_block_t *outblock;
int i;
float input, bufout, output;
float sum;
outblock = allocate();
if (!outblock) {
audio_block_t *tmp = receiveReadOnly(0);
if (tmp) release(tmp);
return;
}
block = receiveReadOnly(0);
if (!block) block = &zeroblock;
for (i=0; i < AUDIO_BLOCK_SAMPLES; i++) {
// TODO: scale numerical range depending on roomsize & damping
//input = sat16(block->data[i] * 8738, 17); // for numerical headroom
input = (float)block->data[i] / 32768.0f;
sum = 0;
bufout = comb1buf[comb1index];
sum += bufout;
comb1filter = bufout * combdamp2 + comb1filter * combdamp1;
comb1buf[comb1index] = input + comb1filter * combfeeback;
if (++comb1index >= sizeof(comb1buf)/sizeof(float)) comb1index = 0;
bufout = comb2buf[comb2index];
sum += bufout;
comb2filter = bufout * combdamp2 + comb2filter * combdamp1;
comb2buf[comb2index] = input + comb2filter * combfeeback;
if (++comb2index >= sizeof(comb2buf)/sizeof(float)) comb2index = 0;
bufout = comb3buf[comb3index];
sum += bufout;
comb3filter = bufout * combdamp2 + comb3filter * combdamp1;
comb3buf[comb3index] = input + comb3filter * combfeeback;
if (++comb3index >= sizeof(comb3buf)/sizeof(float)) comb3index = 0;
bufout = comb4buf[comb4index];
sum += bufout;
comb4filter = bufout * combdamp2 + comb4filter * combdamp1;
comb4buf[comb4index] = input + comb4filter * combfeeback;
if (++comb4index >= sizeof(comb4buf)/sizeof(float)) comb4index = 0;
bufout = comb5buf[comb5index];
sum += bufout;
comb5filter = bufout * combdamp2 + comb5filter * combdamp1;
comb5buf[comb5index] = input + comb5filter * combfeeback;
if (++comb5index >= sizeof(comb5buf)/sizeof(float)) comb5index = 0;
bufout = comb6buf[comb6index];
sum += bufout;
comb6filter = bufout * combdamp2 + comb6filter * combdamp1;
comb6buf[comb6index] = input + comb6filter * combfeeback;
if (++comb6index >= sizeof(comb6buf)/sizeof(float)) comb6index = 0;
bufout = comb7buf[comb7index];
sum += bufout;
comb7filter = bufout * combdamp2 + comb7filter * combdamp1;
comb7buf[comb7index] = input + comb7filter * combfeeback;
if (++comb7index >= sizeof(comb7buf)/sizeof(float)) comb7index = 0;
bufout = comb8buf[comb8index];
sum += bufout;
comb8filter = bufout * combdamp2 + comb8filter * combdamp1;
comb8buf[comb8index] = input + comb8filter * combfeeback;
if (++comb8index >= sizeof(comb8buf)/sizeof(float)) comb8index = 0;
//output = sat16(sum * 31457.0, 17);
//output = sum * 31457.0/131072.0f;
output = sum;
bufout = allpass1buf[allpass1index];
allpass1buf[allpass1index] = output + (bufout / 2.0);
output = (bufout - output) /2.0;
if (++allpass1index >= sizeof(allpass1buf)/sizeof(float)) allpass1index = 0;
bufout = allpass2buf[allpass2index];
allpass2buf[allpass2index] = output + (bufout / 2.0);
output = (bufout - output) /2.0;
if (++allpass2index >= sizeof(allpass2buf)/sizeof(float)) allpass2index = 0;
bufout = allpass3buf[allpass3index];
allpass3buf[allpass3index] = output + (bufout / 2.0);
output = (bufout - output) /2.0;
if (++allpass3index >= sizeof(allpass3buf)/sizeof(float)) allpass3index = 0;
bufout = allpass4buf[allpass4index];
allpass4buf[allpass4index] = output + (bufout / 2.0);
output = (bufout - output) /2.0;
if (++allpass4index >= sizeof(allpass4buf)/sizeof(float)) allpass4index = 0;
//outblock->data[i] = sat16i(output * 30.0, 0);
outblock->data[i] = sat16i(output * 32768.0, 0);
}
transmit(outblock);
release(outblock);
if (block != &zeroblock) release((audio_block_t *)block);
#elif defined(KINETISL)
audio_block_t *block;
block = receiveReadOnly(0);
if (block) release(block);
#endif
}
AudioEffectFreeverbStereoFloat::AudioEffectFreeverbStereoFloat() : AudioStream(1, inputQueueArray)
{
for(unsigned int i = 0; i < sizeof(comb1bufL)/sizeof(float); i++) comb1bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb2bufL)/sizeof(float); i++) comb2bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb3bufL)/sizeof(float); i++) comb3bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb4bufL)/sizeof(float); i++) comb4bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb5bufL)/sizeof(float); i++) comb5bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb6bufL)/sizeof(float); i++) comb6bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb7bufL)/sizeof(float); i++) comb7bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb8bufL)/sizeof(float); i++) comb8bufL[i] = 0.0;
comb1indexL = 0;
comb2indexL = 0;
comb3indexL = 0;
comb4indexL = 0;
comb5indexL = 0;
comb6indexL = 0;
comb7indexL = 0;
comb8indexL = 0;
comb1filterL = 0.0;
comb2filterL = 0.0;
comb3filterL = 0.0;
comb4filterL = 0.0;
comb5filterL = 0.0;
comb6filterL = 0.0;
comb7filterL = 0.0;
comb8filterL = 0.0;
for(unsigned int i = 0; i < sizeof(comb1bufR)/sizeof(float); i++) comb1bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb2bufR)/sizeof(float); i++) comb2bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb3bufR)/sizeof(float); i++) comb3bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb4bufR)/sizeof(float); i++) comb4bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb5bufR)/sizeof(float); i++) comb5bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb6bufR)/sizeof(float); i++) comb6bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb7bufR)/sizeof(float); i++) comb7bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(comb8bufR)/sizeof(float); i++) comb8bufR[i] = 0.0;
comb1indexR = 0;
comb2indexR = 0;
comb3indexR = 0;
comb4indexR = 0;
comb5indexR = 0;
comb6indexR = 0;
comb7indexR = 0;
comb8indexR = 0;
comb1filterR = 0.0;
comb2filterR = 0.0;
comb3filterR = 0.0;
comb4filterR = 0.0;
comb5filterR = 0.0;
comb6filterR = 0.0;
comb7filterR = 0.0;
comb8filterR = 0.0;
combdamp1 = 6553.0;
combdamp2 = 26215.0;
combfeeback = 27524.0;
for(unsigned int i = 0; i < sizeof(allpass1bufL)/sizeof(float); i++) allpass1bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass2bufL)/sizeof(float); i++) allpass2bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass3bufL)/sizeof(float); i++) allpass3bufL[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass4bufL)/sizeof(float); i++) allpass4bufL[i] = 0.0;
allpass1indexL = 0;
allpass2indexL = 0;
allpass3indexL = 0;
allpass4indexL = 0;
for(unsigned int i = 0; i < sizeof(allpass1bufR)/sizeof(float); i++) allpass1bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass2bufR)/sizeof(float); i++) allpass2bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass3bufR)/sizeof(float); i++) allpass3bufR[i] = 0.0;
for(unsigned int i = 0; i < sizeof(allpass4bufR)/sizeof(float); i++) allpass4bufR[i] = 0.0;
allpass1indexR = 0;
allpass2indexR = 0;
allpass3indexR = 0;
allpass4indexR = 0;
}
void AudioEffectFreeverbStereoFloat::update()
{
#if defined(__ARM_ARCH_7EM__)
const audio_block_t *block;
audio_block_t *outblockL;
audio_block_t *outblockR;
int i;
float input, bufout, outputL, outputR;
float sum;
block = receiveReadOnly(0);
outblockL = allocate();
outblockR = allocate();
if (!outblockL || !outblockR) {
if (outblockL) release(outblockL);
if (outblockR) release(outblockR);
if (block) release((audio_block_t *)block);
return;
}
if (!block) block = &zeroblock;
for (i=0; i < AUDIO_BLOCK_SAMPLES; i++) {
// TODO: scale numerical range depending on roomsize & damping
//input = sat16(block->data[i] * 8738.0, 17); // for numerical headroom
input = block->data[i] / 32768.0;
sum = 0;
bufout = comb1bufL[comb1indexL];
sum += bufout;
comb1filterL = bufout * combdamp2 + comb1filterL * combdamp1;
comb1bufL[comb1indexL] = input + comb1filterL * combfeeback;
if (++comb1indexL >= sizeof(comb1bufL)/sizeof(float)) comb1indexL = 0;
bufout = comb2bufL[comb2indexL];
sum += bufout;
comb2filterL = bufout * combdamp2 + comb2filterL * combdamp1;
comb2bufL[comb2indexL] = input + comb2filterL * combfeeback;
if (++comb2indexL >= sizeof(comb2bufL)/sizeof(float)) comb2indexL = 0;
bufout = comb3bufL[comb3indexL];
sum += bufout;
comb3filterL = bufout * combdamp2 + comb3filterL * combdamp1;
comb3bufL[comb3indexL] = input + comb3filterL * combfeeback;
if (++comb3indexL >= sizeof(comb3bufL)/sizeof(float)) comb3indexL = 0;
bufout = comb4bufL[comb4indexL];
sum += bufout;
comb4filterL = bufout * combdamp2 + comb4filterL * combdamp1;
comb4bufL[comb4indexL] = input +comb4filterL * combfeeback;
if (++comb4indexL >= sizeof(comb4bufL)/sizeof(float)) comb4indexL = 0;
bufout = comb5bufL[comb5indexL];
sum += bufout;
comb5filterL = bufout * combdamp2 + comb5filterL * combdamp1;
comb5bufL[comb5indexL] = input + comb5filterL * combfeeback;
if (++comb5indexL >= sizeof(comb5bufL)/sizeof(float)) comb5indexL = 0;
bufout = comb6bufL[comb6indexL];
sum += bufout;
comb6filterL = bufout * combdamp2 + comb6filterL * combdamp1;
comb6bufL[comb6indexL] = input + comb6filterL * combfeeback;
if (++comb6indexL >= sizeof(comb6bufL)/sizeof(float)) comb6indexL = 0;
bufout = comb7bufL[comb7indexL];
sum += bufout;
comb7filterL = bufout * combdamp2 + comb7filterL * combdamp1;
comb7bufL[comb7indexL] = input + comb7filterL * combfeeback;
if (++comb7indexL >= sizeof(comb7bufL)/sizeof(float)) comb7indexL = 0;
bufout = comb8bufL[comb8indexL];
sum += bufout;
comb8filterL = bufout * combdamp2 + comb8filterL * combdamp1;
comb8bufL[comb8indexL] = input + comb8filterL * combfeeback;
if (++comb8indexL >= sizeof(comb8bufL)/sizeof(float)) comb8indexL = 0;
//outputL = sat16(sum * 31457, 17);
//outputL = sum * 31457.0/131072.0f;
outputL = sum;
sum = 0.0;
bufout = comb1bufR[comb1indexR];
sum += bufout;
comb1filterR = bufout * combdamp2 + comb1filterR * combdamp1;
comb1bufR[comb1indexR] = input + comb1filterR * combfeeback;
if (++comb1indexR >= sizeof(comb1bufR)/sizeof(float)) comb1indexR = 0;
bufout = comb2bufR[comb2indexR];
sum += bufout;
comb2filterR = bufout * combdamp2 + comb2filterR * combdamp1;
comb2bufR[comb2indexR] = input + comb2filterR * combfeeback;
if (++comb2indexR >= sizeof(comb2bufR)/sizeof(float)) comb2indexR = 0;
bufout = comb3bufR[comb3indexR];
sum += bufout;
comb3filterR = bufout * combdamp2 + comb3filterR * combdamp1;
comb3bufR[comb3indexR] = input + comb3filterR * combfeeback;
if (++comb3indexR >= sizeof(comb3bufR)/sizeof(float)) comb3indexR = 0;
bufout = comb4bufR[comb4indexR];
sum += bufout;
comb4filterR = bufout * combdamp2 + comb4filterR * combdamp1;
comb4bufR[comb4indexR] = input + comb4filterR * combfeeback;
if (++comb4indexR >= sizeof(comb4bufR)/sizeof(float)) comb4indexR = 0;
bufout = comb5bufR[comb5indexR];
sum += bufout;
comb5filterR = bufout * combdamp2 + comb5filterR * combdamp1;
comb5bufR[comb5indexR] = input + comb5filterR * combfeeback;
if (++comb5indexR >= sizeof(comb5bufR)/sizeof(float)) comb5indexR = 0;
bufout = comb6bufR[comb6indexR];
sum += bufout;
comb6filterR = bufout * combdamp2 + comb6filterR * combdamp1;
comb6bufR[comb6indexR] = input + comb6filterR * combfeeback;
if (++comb6indexR >= sizeof(comb6bufR)/sizeof(float)) comb6indexR = 0;
bufout = comb7bufR[comb7indexR];
sum += bufout;
comb7filterR = bufout * combdamp2 + comb7filterR * combdamp1;
comb7bufR[comb7indexR] = input + comb7filterR * combfeeback;
if (++comb7indexR >= sizeof(comb7bufR)/sizeof(float)) comb7indexR = 0;
bufout = comb8bufR[comb8indexR];
sum += bufout;
comb8filterR = bufout * combdamp2 + comb8filterR * combdamp1;
comb8bufR[comb8indexR] = input + comb8filterR * combfeeback;
if (++comb8indexR >= sizeof(comb8bufR)/sizeof(float)) comb8indexR = 0;
//outputR = sat16(sum * 31457, 17);
//outputR = sum * 31457.0/131072.0f;
outputR = sum;
bufout = allpass1bufL[allpass1indexL];
allpass1bufL[allpass1indexL] = outputL + (bufout / 2.0);
outputL = (bufout - outputL)/2.0;
if (++allpass1indexL >= sizeof(allpass1bufL)/sizeof(float)) allpass1indexL = 0;
bufout = allpass2bufL[allpass2indexL];
allpass2bufL[allpass2indexL] = outputL + (bufout / 2.0);
outputL = (bufout - outputL)/2.0;
if (++allpass2indexL >= sizeof(allpass2bufL)/sizeof(float)) allpass2indexL = 0;
bufout = allpass3bufL[allpass3indexL];
allpass3bufL[allpass3indexL] = outputL + (bufout / 2.0);
outputL = (bufout - outputL)/2.0;
if (++allpass3indexL >= sizeof(allpass3bufL)/sizeof(float)) allpass3indexL = 0;
bufout = allpass4bufL[allpass4indexL];
allpass4bufL[allpass4indexL] = outputL + (bufout / 2.0);
outputL = (bufout - outputL)/2.0;
if (++allpass4indexL >= sizeof(allpass4bufL)/sizeof(float)) allpass4indexL = 0;
//outblockL->data[i] = sat16i(outputL * 30.0, 0);
outblockL->data[i] = sat16i(outputL * 32768.0, 0);
bufout = allpass1bufR[allpass1indexR];
allpass1bufR[allpass1indexR] = outputR + (bufout / 2.0);
//outputR = sat16(bufout - outputR, 1);
outputR = (bufout - outputR)/2.0;
if (++allpass1indexR >= sizeof(allpass1bufR)/sizeof(float)) allpass1indexR = 0;
bufout = allpass2bufR[allpass2indexR];
allpass2bufR[allpass2indexR] = outputR + (bufout / 2.0);
outputR = (bufout - outputR)/2.0;
if (++allpass2indexR >= sizeof(allpass2bufR)/sizeof(float)) allpass2indexR = 0;
bufout = allpass3bufR[allpass3indexR];
allpass3bufR[allpass3indexR] = outputR + (bufout / 2.0);
outputR = (bufout - outputR)/2.0;
if (++allpass3indexR >= sizeof(allpass3bufR)/sizeof(float)) allpass3indexR = 0;
bufout = allpass4bufR[allpass4indexR];
allpass4bufR[allpass4indexR] = outputR + (bufout / 2.0);
outputR = (bufout - outputR)/2.0;
if (++allpass4indexR >= sizeof(allpass4bufR)/sizeof(float)) allpass4indexR = 0;
//outblockR->data[i] = sat16i(outputR * 30.0, 0);
outblockR->data[i] = sat16i(outputR * 32768.0, 0);
}
transmit(outblockL, 0);
transmit(outblockR, 1);
release(outblockL);
release(outblockR);
if (block != &zeroblock) release((audio_block_t *)block);
#elif defined(KINETISL)
audio_block_t *block;
block = receiveReadOnly(0);
if (block) release(block);
#endif
}

190
effect_freeverbf.h
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/* Audio Library for Teensy 3.X
* Copyright (c) 2018, Paul Stoffregen, paul@pjrc.com
*
* Development of this audio library was funded by PJRC.COM, LLC by sales of
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
* open source software by purchasing Teensy or other PJRC products.
*
* 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, development funding 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_freeverb_f_h_
#define effect_freeverb_f_h_
#include <Arduino.h>
#include "AudioStream.h"
class AudioEffectFreeverbFloat : public AudioStream
{
public:
AudioEffectFreeverbFloat();
virtual void update();
void roomsize(float n) {
if (n > 1.0f) n = 1.0f;
else if (n < 0.0) n = 0.0f;
//combfeeback = (n * 9175.04f) + 22937.0;
combfeeback = (n * 9175.04f/32768.0f) + 22937.0/32768.0f;
}
void damping(float n) {
if (n > 1.0f) n = 1.0f;
else if (n < 0.0) n = 0.0f;
//float x1 = (n * 13107.2f);
//float x2 = 32768.0 - x1;
float x1 = (n * 13107.2f/ 32768.0f);
float x2 = 1.0 - x1;
__disable_irq();
combdamp1 = x1;
combdamp2 = x2;
__enable_irq();
}
private:
audio_block_t *inputQueueArray[1];
float comb1buf[1116];
float comb2buf[1188];
float comb3buf[1277];
float comb4buf[1356];
float comb5buf[1422];
float comb6buf[1491];
float comb7buf[1557];
float comb8buf[1617];
uint16_t comb1index;
uint16_t comb2index;
uint16_t comb3index;
uint16_t comb4index;
uint16_t comb5index;
uint16_t comb6index;
uint16_t comb7index;
uint16_t comb8index;
float comb1filter;
float comb2filter;
float comb3filter;
float comb4filter;
float comb5filter;
float comb6filter;
float comb7filter;
float comb8filter;
float combdamp1;
float combdamp2;
float combfeeback;
float allpass1buf[556];
float allpass2buf[441];
float allpass3buf[341];
float allpass4buf[225];
uint16_t allpass1index;
uint16_t allpass2index;
uint16_t allpass3index;
uint16_t allpass4index;
};
class AudioEffectFreeverbStereoFloat : public AudioStream
{
public:
AudioEffectFreeverbStereoFloat();
virtual void update();
void roomsize(float n) {
if (n > 1.0f) n = 1.0f;
else if (n < 0.0) n = 0.0f;
//combfeeback = (n * 9175.04f) + 22937.0;
combfeeback = (n * 9175.04f/32768.0f) + 22937.0/32768.0f;
}
void damping(float n) {
if (n > 1.0f) n = 1.0f;
else if (n < 0.0) n = 0.0f;
//float x1 = (n * 13107.2f);
//float x2 = 32768.0 - x1;
float x1 = (n * 13107.2f/ 32768.0f);
float x2 = 1.0 - x1;
__disable_irq();
combdamp1 = x1;
combdamp2 = x2;
__enable_irq();
}
private:
audio_block_t *inputQueueArray[1];
float comb1bufL[1116];
float comb2bufL[1188];
float comb3bufL[1277];
float comb4bufL[1356];
float comb5bufL[1422];
float comb6bufL[1491];
float comb7bufL[1557];
float comb8bufL[1617];
uint16_t comb1indexL;
uint16_t comb2indexL;
uint16_t comb3indexL;
uint16_t comb4indexL;
uint16_t comb5indexL;
uint16_t comb6indexL;
uint16_t comb7indexL;
uint16_t comb8indexL;
float comb1filterL;
float comb2filterL;
float comb3filterL;
float comb4filterL;
float comb5filterL;
float comb6filterL;
float comb7filterL;
float comb8filterL;
float comb1bufR[1139];
float comb2bufR[1211];
float comb3bufR[1300];
float comb4bufR[1379];
float comb5bufR[1445];
float comb6bufR[1514];
float comb7bufR[1580];
float comb8bufR[1640];
uint16_t comb1indexR;
uint16_t comb2indexR;
uint16_t comb3indexR;
uint16_t comb4indexR;
uint16_t comb5indexR;
uint16_t comb6indexR;
uint16_t comb7indexR;
uint16_t comb8indexR;
float comb1filterR;
float comb2filterR;
float comb3filterR;
float comb4filterR;
float comb5filterR;
float comb6filterR;
float comb7filterR;
float comb8filterR;
float combdamp1;
float combdamp2;
float combfeeback;
float allpass1bufL[556];
float allpass2bufL[441];
float allpass3bufL[341];
float allpass4bufL[225];
uint16_t allpass1indexL;
uint16_t allpass2indexL;
uint16_t allpass3indexL;
uint16_t allpass4indexL;
float allpass1bufR[579];
float allpass2bufR[464];
float allpass3bufR[364];
float allpass4bufR[248];
uint16_t allpass1indexR;
uint16_t allpass2indexR;
uint16_t allpass3indexR;
uint16_t allpass4indexR;
};
#endif
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