Added fixed freeverb to avoid buzzing noise (PR from https://github.com/PaulStoffregen/Audio/pull/357/files)
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/* Audio Library for Teensy 3.X
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* Copyright (c) 2018, Paul Stoffregen, paul@pjrc.com |
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* |
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* Development of this audio library was funded by PJRC.COM, LLC by sales of |
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop |
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* open source software by purchasing Teensy or other PJRC products. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice, development funding notice, and this permission |
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* notice shall be included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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// A fixed point implementation of Freeverb by Jezar at Dreampoint
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// http://blog.bjornroche.com/2012/06/freeverb-original-public-domain-code-by.html
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// https://music.columbia.edu/pipermail/music-dsp/2001-October/045433.html
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#include <Arduino.h> |
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#include "my_effect_freeverb.h" |
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#include "utility/dspinst.h" |
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MyAudioEffectFreeverb::MyAudioEffectFreeverb() : AudioStream(1, inputQueueArray) |
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{ |
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memset(comb1buf, 0, sizeof(comb1buf)); |
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memset(comb2buf, 0, sizeof(comb2buf)); |
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memset(comb3buf, 0, sizeof(comb3buf)); |
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memset(comb4buf, 0, sizeof(comb4buf)); |
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memset(comb5buf, 0, sizeof(comb5buf)); |
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memset(comb6buf, 0, sizeof(comb6buf)); |
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memset(comb7buf, 0, sizeof(comb7buf)); |
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memset(comb8buf, 0, sizeof(comb8buf)); |
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comb1index = 0; |
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comb2index = 0; |
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comb3index = 0; |
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comb4index = 0; |
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comb5index = 0; |
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comb6index = 0; |
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comb7index = 0; |
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comb8index = 0; |
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comb1filter = 0; |
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comb2filter = 0; |
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comb3filter = 0; |
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comb4filter = 0; |
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comb5filter = 0; |
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comb6filter = 0; |
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comb7filter = 0; |
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comb8filter = 0; |
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combdamp1 = 6553; |
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combdamp2 = 26215; |
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combfeeback = 27524; |
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memset(allpass1buf, 0, sizeof(allpass1buf)); |
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memset(allpass2buf, 0, sizeof(allpass2buf)); |
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memset(allpass3buf, 0, sizeof(allpass3buf)); |
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memset(allpass4buf, 0, sizeof(allpass4buf)); |
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allpass1index = 0; |
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allpass2index = 0; |
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allpass3index = 0; |
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allpass4index = 0; |
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} |
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// cleaner sat16 by http://www.moseleyinstruments.com/
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static int16_t sat16(int32_t n, int rshift) {
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// we should always round towards 0
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// to avoid recirculating round-off noise
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//
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// a 2s complement positive number is always
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// rounded down, so we only need to take
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// care of negative numbers
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if (n < 0) {
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n = n + (~(0xFFFFFFFFUL << rshift));
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}
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n = n >> rshift;
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if (n > 32767) {
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return 32767;
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}
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if (n < -32768) {
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return -32768;
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}
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return n;
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}
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// TODO: move this to one of the data files, use in output_adat.cpp, output_tdm.cpp, etc
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static const audio_block_t zeroblock = { |
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0, 0, 0, { |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#if AUDIO_BLOCK_SAMPLES > 16 |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#endif |
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#if AUDIO_BLOCK_SAMPLES > 32 |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#endif |
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#if AUDIO_BLOCK_SAMPLES > 48 |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#endif |
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#if AUDIO_BLOCK_SAMPLES > 64 |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#endif |
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#if AUDIO_BLOCK_SAMPLES > 80 |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#endif |
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#if AUDIO_BLOCK_SAMPLES > 96 |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#endif |
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#if AUDIO_BLOCK_SAMPLES > 112 |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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#endif |
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} }; |
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void MyAudioEffectFreeverb::update() |
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{ |
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#if defined(__ARM_ARCH_7EM__) |
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const audio_block_t *block; |
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audio_block_t *outblock; |
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int i; |
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int16_t input, bufout, output; |
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int32_t sum; |
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outblock = allocate(); |
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if (!outblock) { |
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audio_block_t *tmp = receiveReadOnly(0); |
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if (tmp) release(tmp); |
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return; |
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} |
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block = receiveReadOnly(0); |
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if (!block) block = &zeroblock; |
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for (i=0; i < AUDIO_BLOCK_SAMPLES; i++) { |
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// TODO: scale numerical range depending on roomsize & damping
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input = sat16(block->data[i] * 8738, 17); // for numerical headroom
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sum = 0; |
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bufout = comb1buf[comb1index]; |
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sum += bufout; |
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comb1filter = sat16(bufout * combdamp2 + comb1filter * combdamp1, 15); |
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comb1buf[comb1index] = sat16(input + sat16(comb1filter * combfeeback, 15), 0); |
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if (++comb1index >= sizeof(comb1buf)/sizeof(int16_t)) comb1index = 0; |
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bufout = comb2buf[comb2index]; |
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sum += bufout; |
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comb2filter = sat16(bufout * combdamp2 + comb2filter * combdamp1, 15); |
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comb2buf[comb2index] = sat16(input + sat16(comb2filter * combfeeback, 15), 0); |
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if (++comb2index >= sizeof(comb2buf)/sizeof(int16_t)) comb2index = 0; |
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bufout = comb3buf[comb3index]; |
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sum += bufout; |
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comb3filter = sat16(bufout * combdamp2 + comb3filter * combdamp1, 15); |
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comb3buf[comb3index] = sat16(input + sat16(comb3filter * combfeeback, 15), 0); |
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if (++comb3index >= sizeof(comb3buf)/sizeof(int16_t)) comb3index = 0; |
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bufout = comb4buf[comb4index]; |
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sum += bufout; |
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comb4filter = sat16(bufout * combdamp2 + comb4filter * combdamp1, 15); |
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comb4buf[comb4index] = sat16(input + sat16(comb4filter * combfeeback, 15), 0); |
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if (++comb4index >= sizeof(comb4buf)/sizeof(int16_t)) comb4index = 0; |
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bufout = comb5buf[comb5index]; |
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sum += bufout; |
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comb5filter = sat16(bufout * combdamp2 + comb5filter * combdamp1, 15); |
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comb5buf[comb5index] = sat16(input + sat16(comb5filter * combfeeback, 15), 0); |
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if (++comb5index >= sizeof(comb5buf)/sizeof(int16_t)) comb5index = 0; |
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bufout = comb6buf[comb6index]; |
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sum += bufout; |
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comb6filter = sat16(bufout * combdamp2 + comb6filter * combdamp1, 15); |
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comb6buf[comb6index] = sat16(input + sat16(comb6filter * combfeeback, 15), 0); |
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if (++comb6index >= sizeof(comb6buf)/sizeof(int16_t)) comb6index = 0; |
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bufout = comb7buf[comb7index]; |
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sum += bufout; |
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comb7filter = sat16(bufout * combdamp2 + comb7filter * combdamp1, 15); |
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comb7buf[comb7index] = sat16(input + sat16(comb7filter * combfeeback, 15), 0); |
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if (++comb7index >= sizeof(comb7buf)/sizeof(int16_t)) comb7index = 0; |
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bufout = comb8buf[comb8index]; |
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sum += bufout; |
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comb8filter = sat16(bufout * combdamp2 + comb8filter * combdamp1, 15); |
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comb8buf[comb8index] = sat16(input + sat16(comb8filter * combfeeback, 15), 0); |
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if (++comb8index >= sizeof(comb8buf)/sizeof(int16_t)) comb8index = 0; |
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output = sat16(sum * 31457, 17); |
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bufout = allpass1buf[allpass1index]; |
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allpass1buf[allpass1index] = output + (bufout >> 1); |
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output = sat16(bufout - output, 1); |
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if (++allpass1index >= sizeof(allpass1buf)/sizeof(int16_t)) allpass1index = 0; |
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bufout = allpass2buf[allpass2index]; |
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allpass2buf[allpass2index] = output + (bufout >> 1); |
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output = sat16(bufout - output, 1); |
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if (++allpass2index >= sizeof(allpass2buf)/sizeof(int16_t)) allpass2index = 0; |
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bufout = allpass3buf[allpass3index]; |
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allpass3buf[allpass3index] = output + (bufout >> 1); |
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output = sat16(bufout - output, 1); |
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if (++allpass3index >= sizeof(allpass3buf)/sizeof(int16_t)) allpass3index = 0; |
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bufout = allpass4buf[allpass4index]; |
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allpass4buf[allpass4index] = output + (bufout >> 1); |
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output = sat16(bufout - output, 1); |
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if (++allpass4index >= sizeof(allpass4buf)/sizeof(int16_t)) allpass4index = 0; |
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outblock->data[i] = sat16(output * 30, 0); |
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} |
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transmit(outblock); |
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release(outblock); |
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if (block != &zeroblock) release((audio_block_t *)block); |
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#elif defined(KINETISL) |
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audio_block_t *block; |
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block = receiveReadOnly(0); |
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if (block) release(block); |
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#endif |
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} |
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MyAudioEffectFreeverbStereo::MyAudioEffectFreeverbStereo() : AudioStream(1, inputQueueArray) |
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{ |
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memset(comb1bufL, 0, sizeof(comb1bufL)); |
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memset(comb2bufL, 0, sizeof(comb2bufL)); |
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memset(comb3bufL, 0, sizeof(comb3bufL)); |
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memset(comb4bufL, 0, sizeof(comb4bufL)); |
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memset(comb5bufL, 0, sizeof(comb5bufL)); |
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memset(comb6bufL, 0, sizeof(comb6bufL)); |
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memset(comb7bufL, 0, sizeof(comb7bufL)); |
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memset(comb8bufL, 0, sizeof(comb8bufL)); |
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comb1indexL = 0; |
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comb2indexL = 0; |
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comb3indexL = 0; |
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comb4indexL = 0; |
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comb5indexL = 0; |
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comb6indexL = 0; |
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comb7indexL = 0; |
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comb8indexL = 0; |
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comb1filterL = 0; |
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comb2filterL = 0; |
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comb3filterL = 0; |
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comb4filterL = 0; |
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comb5filterL = 0; |
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comb6filterL = 0; |
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comb7filterL = 0; |
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comb8filterL = 0; |
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memset(comb1bufR, 0, sizeof(comb1bufR)); |
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memset(comb2bufR, 0, sizeof(comb2bufR)); |
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memset(comb3bufR, 0, sizeof(comb3bufR)); |
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memset(comb4bufR, 0, sizeof(comb4bufR)); |
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memset(comb5bufR, 0, sizeof(comb5bufR)); |
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memset(comb6bufR, 0, sizeof(comb6bufR)); |
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memset(comb7bufR, 0, sizeof(comb7bufR)); |
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memset(comb8bufR, 0, sizeof(comb8bufR)); |
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comb1indexR = 0; |
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comb2indexR = 0; |
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comb3indexR = 0; |
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comb4indexR = 0; |
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comb5indexR = 0; |
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comb6indexR = 0; |
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comb7indexR = 0; |
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comb8indexR = 0; |
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comb1filterR = 0; |
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comb2filterR = 0; |
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comb3filterR = 0; |
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comb4filterR = 0; |
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comb5filterR = 0; |
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comb6filterR = 0; |
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comb7filterR = 0; |
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comb8filterR = 0; |
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combdamp1 = 6553; |
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combdamp2 = 26215; |
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combfeeback = 27524; |
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memset(allpass1bufL, 0, sizeof(allpass1bufL)); |
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memset(allpass2bufL, 0, sizeof(allpass2bufL)); |
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memset(allpass3bufL, 0, sizeof(allpass3bufL)); |
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memset(allpass4bufL, 0, sizeof(allpass4bufL)); |
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allpass1indexL = 0; |
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allpass2indexL = 0; |
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allpass3indexL = 0; |
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allpass4indexL = 0; |
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memset(allpass1bufR, 0, sizeof(allpass1bufR)); |
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memset(allpass2bufR, 0, sizeof(allpass2bufR)); |
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memset(allpass3bufR, 0, sizeof(allpass3bufR)); |
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memset(allpass4bufR, 0, sizeof(allpass4bufR)); |
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allpass1indexR = 0; |
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allpass2indexR = 0; |
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allpass3indexR = 0; |
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allpass4indexR = 0; |
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} |
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void MyAudioEffectFreeverbStereo::update() |
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{ |
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#if defined(__ARM_ARCH_7EM__) |
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const audio_block_t *block; |
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audio_block_t *outblockL; |
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audio_block_t *outblockR; |
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int i; |
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int16_t input, bufout, outputL, outputR; |
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int32_t sum; |
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block = receiveReadOnly(0); |
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outblockL = allocate(); |
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outblockR = allocate(); |
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if (!outblockL || !outblockR) { |
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if (outblockL) release(outblockL); |
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if (outblockR) release(outblockR); |
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if (block) release((audio_block_t *)block); |
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return; |
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} |
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if (!block) block = &zeroblock; |
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for (i=0; i < AUDIO_BLOCK_SAMPLES; i++) { |
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// TODO: scale numerical range depending on roomsize & damping
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input = sat16(block->data[i] * 8738, 17); // for numerical headroom
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sum = 0; |
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bufout = comb1bufL[comb1indexL]; |
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sum += bufout; |
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comb1filterL = sat16(bufout * combdamp2 + comb1filterL * combdamp1, 15); |
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comb1bufL[comb1indexL] = sat16(input + sat16(comb1filterL * combfeeback, 15), 0); |
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if (++comb1indexL >= sizeof(comb1bufL)/sizeof(int16_t)) comb1indexL = 0; |
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bufout = comb2bufL[comb2indexL]; |
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sum += bufout; |
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comb2filterL = sat16(bufout * combdamp2 + comb2filterL * combdamp1, 15); |
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comb2bufL[comb2indexL] = sat16(input + sat16(comb2filterL * combfeeback, 15), 0); |
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if (++comb2indexL >= sizeof(comb2bufL)/sizeof(int16_t)) comb2indexL = 0; |
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bufout = comb3bufL[comb3indexL]; |
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sum += bufout; |
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comb3filterL = sat16(bufout * combdamp2 + comb3filterL * combdamp1, 15); |
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comb3bufL[comb3indexL] = sat16(input + sat16(comb3filterL * combfeeback, 15), 0); |
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if (++comb3indexL >= sizeof(comb3bufL)/sizeof(int16_t)) comb3indexL = 0; |
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bufout = comb4bufL[comb4indexL]; |
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sum += bufout; |
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comb4filterL = sat16(bufout * combdamp2 + comb4filterL * combdamp1, 15); |
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comb4bufL[comb4indexL] = sat16(input + sat16(comb4filterL * combfeeback, 15), 0); |
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if (++comb4indexL >= sizeof(comb4bufL)/sizeof(int16_t)) comb4indexL = 0; |
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bufout = comb5bufL[comb5indexL]; |
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sum += bufout; |
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comb5filterL = sat16(bufout * combdamp2 + comb5filterL * combdamp1, 15); |
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comb5bufL[comb5indexL] = sat16(input + sat16(comb5filterL * combfeeback, 15), 0); |
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|
if (++comb5indexL >= sizeof(comb5bufL)/sizeof(int16_t)) comb5indexL = 0; |
||||||
|
|
||||||
|
bufout = comb6bufL[comb6indexL]; |
||||||
|
sum += bufout; |
||||||
|
comb6filterL = sat16(bufout * combdamp2 + comb6filterL * combdamp1, 15); |
||||||
|
comb6bufL[comb6indexL] = sat16(input + sat16(comb6filterL * combfeeback, 15), 0); |
||||||
|
if (++comb6indexL >= sizeof(comb6bufL)/sizeof(int16_t)) comb6indexL = 0; |
||||||
|
|
||||||
|
bufout = comb7bufL[comb7indexL]; |
||||||
|
sum += bufout; |
||||||
|
comb7filterL = sat16(bufout * combdamp2 + comb7filterL * combdamp1, 15); |
||||||
|
comb7bufL[comb7indexL] = sat16(input + sat16(comb7filterL * combfeeback, 15), 0); |
||||||
|
if (++comb7indexL >= sizeof(comb7bufL)/sizeof(int16_t)) comb7indexL = 0; |
||||||
|
|
||||||
|
bufout = comb8bufL[comb8indexL]; |
||||||
|
sum += bufout; |
||||||
|
comb8filterL = sat16(bufout * combdamp2 + comb8filterL * combdamp1, 15); |
||||||
|
comb8bufL[comb8indexL] = sat16(input + sat16(comb8filterL * combfeeback, 15), 0); |
||||||
|
if (++comb8indexL >= sizeof(comb8bufL)/sizeof(int16_t)) comb8indexL = 0; |
||||||
|
|
||||||
|
outputL = sat16(sum * 31457, 17); |
||||||
|
sum = 0; |
||||||
|
|
||||||
|
bufout = comb1bufR[comb1indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb1filterR = sat16(bufout * combdamp2 + comb1filterR * combdamp1, 15); |
||||||
|
comb1bufR[comb1indexR] = sat16(input + sat16(comb1filterR * combfeeback, 15), 0); |
||||||
|
if (++comb1indexR >= sizeof(comb1bufR)/sizeof(int16_t)) comb1indexR = 0; |
||||||
|
|
||||||
|
bufout = comb2bufR[comb2indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb2filterR = sat16(bufout * combdamp2 + comb2filterR * combdamp1, 15); |
||||||
|
comb2bufR[comb2indexR] = sat16(input + sat16(comb2filterR * combfeeback, 15), 0); |
||||||
|
if (++comb2indexR >= sizeof(comb2bufR)/sizeof(int16_t)) comb2indexR = 0; |
||||||
|
|
||||||
|
bufout = comb3bufR[comb3indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb3filterR = sat16(bufout * combdamp2 + comb3filterR * combdamp1, 15); |
||||||
|
comb3bufR[comb3indexR] = sat16(input + sat16(comb3filterR * combfeeback, 15), 0); |
||||||
|
if (++comb3indexR >= sizeof(comb3bufR)/sizeof(int16_t)) comb3indexR = 0; |
||||||
|
|
||||||
|
bufout = comb4bufR[comb4indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb4filterR = sat16(bufout * combdamp2 + comb4filterR * combdamp1, 15); |
||||||
|
comb4bufR[comb4indexR] = sat16(input + sat16(comb4filterR * combfeeback, 15), 0); |
||||||
|
if (++comb4indexR >= sizeof(comb4bufR)/sizeof(int16_t)) comb4indexR = 0; |
||||||
|
|
||||||
|
bufout = comb5bufR[comb5indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb5filterR = sat16(bufout * combdamp2 + comb5filterR * combdamp1, 15); |
||||||
|
comb5bufR[comb5indexR] = sat16(input + sat16(comb5filterR * combfeeback, 15), 0); |
||||||
|
if (++comb5indexR >= sizeof(comb5bufR)/sizeof(int16_t)) comb5indexR = 0; |
||||||
|
|
||||||
|
bufout = comb6bufR[comb6indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb6filterR = sat16(bufout * combdamp2 + comb6filterR * combdamp1, 15); |
||||||
|
comb6bufR[comb6indexR] = sat16(input + sat16(comb6filterR * combfeeback, 15), 0); |
||||||
|
if (++comb6indexR >= sizeof(comb6bufR)/sizeof(int16_t)) comb6indexR = 0; |
||||||
|
|
||||||
|
bufout = comb7bufR[comb7indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb7filterR = sat16(bufout * combdamp2 + comb7filterR * combdamp1, 15); |
||||||
|
comb7bufR[comb7indexR] = sat16(input + sat16(comb7filterR * combfeeback, 15), 0); |
||||||
|
if (++comb7indexR >= sizeof(comb7bufR)/sizeof(int16_t)) comb7indexR = 0; |
||||||
|
|
||||||
|
bufout = comb8bufR[comb8indexR]; |
||||||
|
sum += bufout; |
||||||
|
comb8filterR = sat16(bufout * combdamp2 + comb8filterR * combdamp1, 15); |
||||||
|
comb8bufR[comb8indexR] = sat16(input + sat16(comb8filterR * combfeeback, 15), 0); |
||||||
|
if (++comb8indexR >= sizeof(comb8bufR)/sizeof(int16_t)) comb8indexR = 0; |
||||||
|
|
||||||
|
outputR = sat16(sum * 31457, 17); |
||||||
|
|
||||||
|
bufout = allpass1bufL[allpass1indexL]; |
||||||
|
allpass1bufL[allpass1indexL] = outputL + (bufout >> 1); |
||||||
|
outputL = sat16(bufout - outputL, 1); |
||||||
|
if (++allpass1indexL >= sizeof(allpass1bufL)/sizeof(int16_t)) allpass1indexL = 0; |
||||||
|
|
||||||
|
bufout = allpass2bufL[allpass2indexL]; |
||||||
|
allpass2bufL[allpass2indexL] = outputL + (bufout >> 1); |
||||||
|
outputL = sat16(bufout - outputL, 1); |
||||||
|
if (++allpass2indexL >= sizeof(allpass2bufL)/sizeof(int16_t)) allpass2indexL = 0; |
||||||
|
|
||||||
|
bufout = allpass3bufL[allpass3indexL]; |
||||||
|
allpass3bufL[allpass3indexL] = outputL + (bufout >> 1); |
||||||
|
outputL = sat16(bufout - outputL, 1); |
||||||
|
if (++allpass3indexL >= sizeof(allpass3bufL)/sizeof(int16_t)) allpass3indexL = 0; |
||||||
|
|
||||||
|
bufout = allpass4bufL[allpass4indexL]; |
||||||
|
allpass4bufL[allpass4indexL] = outputL + (bufout >> 1); |
||||||
|
outputL = sat16(bufout - outputL, 1); |
||||||
|
if (++allpass4indexL >= sizeof(allpass4bufL)/sizeof(int16_t)) allpass4indexL = 0; |
||||||
|
|
||||||
|
outblockL->data[i] = sat16(outputL * 30, 0); |
||||||
|
|
||||||
|
bufout = allpass1bufR[allpass1indexR]; |
||||||
|
allpass1bufR[allpass1indexR] = outputR + (bufout >> 1); |
||||||
|
outputR = sat16(bufout - outputR, 1); |
||||||
|
if (++allpass1indexR >= sizeof(allpass1bufR)/sizeof(int16_t)) allpass1indexR = 0; |
||||||
|
|
||||||
|
bufout = allpass2bufR[allpass2indexR]; |
||||||
|
allpass2bufR[allpass2indexR] = outputR + (bufout >> 1); |
||||||
|
outputR = sat16(bufout - outputR, 1); |
||||||
|
if (++allpass2indexR >= sizeof(allpass2bufR)/sizeof(int16_t)) allpass2indexR = 0; |
||||||
|
|
||||||
|
bufout = allpass3bufR[allpass3indexR]; |
||||||
|
allpass3bufR[allpass3indexR] = outputR + (bufout >> 1); |
||||||
|
outputR = sat16(bufout - outputR, 1); |
||||||
|
if (++allpass3indexR >= sizeof(allpass3bufR)/sizeof(int16_t)) allpass3indexR = 0; |
||||||
|
|
||||||
|
bufout = allpass4bufR[allpass4indexR]; |
||||||
|
allpass4bufR[allpass4indexR] = outputR + (bufout >> 1); |
||||||
|
outputR = sat16(bufout - outputR, 1); |
||||||
|
if (++allpass4indexR >= sizeof(allpass4bufR)/sizeof(int16_t)) allpass4indexR = 0; |
||||||
|
|
||||||
|
outblockR->data[i] = sat16(outputL * 30, 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 |
||||||
|
} |
||||||
@ -0,0 +1,184 @@ |
|||||||
|
/* 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 my_effect_freeverb_h_ |
||||||
|
#define my_effect_freeverb_h_ |
||||||
|
#include <Arduino.h> |
||||||
|
#include "AudioStream.h" |
||||||
|
|
||||||
|
class MyAudioEffectFreeverb : public AudioStream |
||||||
|
{ |
||||||
|
public: |
||||||
|
MyAudioEffectFreeverb(); |
||||||
|
virtual void update(); |
||||||
|
void roomsize(float n) { |
||||||
|
if (n > 1.0f) n = 1.0f; |
||||||
|
else if (n < 0.0) n = 0.0f; |
||||||
|
combfeeback = (int)(n * 9175.04f) + 22937; |
||||||
|
} |
||||||
|
void damping(float n) { |
||||||
|
if (n > 1.0f) n = 1.0f; |
||||||
|
else if (n < 0.0) n = 0.0f; |
||||||
|
int x1 = (int)(n * 13107.2f); |
||||||
|
int x2 = 32768 - x1; |
||||||
|
__disable_irq(); |
||||||
|
combdamp1 = x1; |
||||||
|
combdamp2 = x2; |
||||||
|
__enable_irq(); |
||||||
|
} |
||||||
|
private: |
||||||
|
audio_block_t *inputQueueArray[1]; |
||||||
|
int16_t comb1buf[1116]; |
||||||
|
int16_t comb2buf[1188]; |
||||||
|
int16_t comb3buf[1277]; |
||||||
|
int16_t comb4buf[1356]; |
||||||
|
int16_t comb5buf[1422]; |
||||||
|
int16_t comb6buf[1491]; |
||||||
|
int16_t comb7buf[1557]; |
||||||
|
int16_t 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; |
||||||
|
int16_t comb1filter; |
||||||
|
int16_t comb2filter; |
||||||
|
int16_t comb3filter; |
||||||
|
int16_t comb4filter; |
||||||
|
int16_t comb5filter; |
||||||
|
int16_t comb6filter; |
||||||
|
int16_t comb7filter; |
||||||
|
int16_t comb8filter; |
||||||
|
int16_t combdamp1; |
||||||
|
int16_t combdamp2; |
||||||
|
int16_t combfeeback; |
||||||
|
int16_t allpass1buf[556]; |
||||||
|
int16_t allpass2buf[441]; |
||||||
|
int16_t allpass3buf[341]; |
||||||
|
int16_t allpass4buf[225]; |
||||||
|
uint16_t allpass1index; |
||||||
|
uint16_t allpass2index; |
||||||
|
uint16_t allpass3index; |
||||||
|
uint16_t allpass4index; |
||||||
|
}; |
||||||
|
|
||||||
|
|
||||||
|
class MyAudioEffectFreeverbStereo : public AudioStream |
||||||
|
{ |
||||||
|
public: |
||||||
|
MyAudioEffectFreeverbStereo(); |
||||||
|
virtual void update(); |
||||||
|
void roomsize(float n) { |
||||||
|
if (n > 1.0f) n = 1.0f; |
||||||
|
else if (n < 0.0) n = 0.0f; |
||||||
|
combfeeback = (int)(n * 9175.04f) + 22937; |
||||||
|
} |
||||||
|
void damping(float n) { |
||||||
|
if (n > 1.0f) n = 1.0f; |
||||||
|
else if (n < 0.0) n = 0.0f; |
||||||
|
int x1 = (int)(n * 13107.2f); |
||||||
|
int x2 = 32768 - x1; |
||||||
|
__disable_irq(); |
||||||
|
combdamp1 = x1; |
||||||
|
combdamp2 = x2; |
||||||
|
__enable_irq(); |
||||||
|
} |
||||||
|
private: |
||||||
|
audio_block_t *inputQueueArray[1]; |
||||||
|
int16_t comb1bufL[1116]; |
||||||
|
int16_t comb2bufL[1188]; |
||||||
|
int16_t comb3bufL[1277]; |
||||||
|
int16_t comb4bufL[1356]; |
||||||
|
int16_t comb5bufL[1422]; |
||||||
|
int16_t comb6bufL[1491]; |
||||||
|
int16_t comb7bufL[1557]; |
||||||
|
int16_t 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; |
||||||
|
int16_t comb1filterL; |
||||||
|
int16_t comb2filterL; |
||||||
|
int16_t comb3filterL; |
||||||
|
int16_t comb4filterL; |
||||||
|
int16_t comb5filterL; |
||||||
|
int16_t comb6filterL; |
||||||
|
int16_t comb7filterL; |
||||||
|
int16_t comb8filterL; |
||||||
|
int16_t comb1bufR[1139]; |
||||||
|
int16_t comb2bufR[1211]; |
||||||
|
int16_t comb3bufR[1300]; |
||||||
|
int16_t comb4bufR[1379]; |
||||||
|
int16_t comb5bufR[1445]; |
||||||
|
int16_t comb6bufR[1514]; |
||||||
|
int16_t comb7bufR[1580]; |
||||||
|
int16_t 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; |
||||||
|
int16_t comb1filterR; |
||||||
|
int16_t comb2filterR; |
||||||
|
int16_t comb3filterR; |
||||||
|
int16_t comb4filterR; |
||||||
|
int16_t comb5filterR; |
||||||
|
int16_t comb6filterR; |
||||||
|
int16_t comb7filterR; |
||||||
|
int16_t comb8filterR; |
||||||
|
int16_t combdamp1; |
||||||
|
int16_t combdamp2; |
||||||
|
int16_t combfeeback; |
||||||
|
int16_t allpass1bufL[556]; |
||||||
|
int16_t allpass2bufL[441]; |
||||||
|
int16_t allpass3bufL[341]; |
||||||
|
int16_t allpass4bufL[225]; |
||||||
|
uint16_t allpass1indexL; |
||||||
|
uint16_t allpass2indexL; |
||||||
|
uint16_t allpass3indexL; |
||||||
|
uint16_t allpass4indexL; |
||||||
|
int16_t allpass1bufR[579]; |
||||||
|
int16_t allpass2bufR[464]; |
||||||
|
int16_t allpass3bufR[364]; |
||||||
|
int16_t allpass4bufR[248]; |
||||||
|
uint16_t allpass1indexR; |
||||||
|
uint16_t allpass2indexR; |
||||||
|
uint16_t allpass3indexR; |
||||||
|
uint16_t allpass4indexR; |
||||||
|
}; |
||||||
|
|
||||||
|
|
||||||
|
#endif |
||||||
Loading…
Reference in new issue