From e95fb824f00bc99290807c8ef7b668563b9a1d5d Mon Sep 17 00:00:00 2001 From: Holger Wirtz Date: Wed, 26 Aug 2020 14:01:59 +0200 Subject: [PATCH] Adding patched version of FreeVerb for avoiding noise. --- MicroMDAEPiano.ino | 12 +- UI.hpp | 9 +- config.h | 8 +- my_effect_freeverb.cpp | 482 +++++++++++++++++++++++++++++++++++++++++ my_effect_freeverb.h | 184 ++++++++++++++++ 5 files changed, 688 insertions(+), 7 deletions(-) create mode 100644 my_effect_freeverb.cpp create mode 100644 my_effect_freeverb.h diff --git a/MicroMDAEPiano.ino b/MicroMDAEPiano.ino index 65fdb9d..fd1fb25 100644 --- a/MicroMDAEPiano.ino +++ b/MicroMDAEPiano.ino @@ -30,6 +30,9 @@ #include "mdaEPiano.h" #include "source_micromdaepiano.h" #include "effect_modulated_delay.h" +#ifdef PATCHED_FREEVERB +#include "my_effect_freeverb.h" +#endif #ifdef USE_XFADE_DATA #include "mdaEPianoDataXfade.h" #else @@ -47,8 +50,13 @@ AudioSourceMicroMDAEPiano ep; AudioAnalyzePeak peak_r; AudioAnalyzePeak peak_l; -AudioEffectFreeverb freeverb_r; -AudioEffectFreeverb freeverb_l; +#ifndef PATCHED_FREEVERB +AudioEffectFreeverb freeverb_r; +AudioEffectFreeverb freeverb_l; +#else +MyAudioEffectFreeverb freeverb_r; +MyAudioEffectFreeverb freeverb_l; +#endif AudioMixer4 mixer_r; AudioMixer4 mixer_l; AudioAmplifier volume_r; diff --git a/UI.hpp b/UI.hpp index 70a8c05..ee9b432 100644 --- a/UI.hpp +++ b/UI.hpp @@ -123,8 +123,13 @@ extern void eeprom_config_write(uint8_t value); extern AudioControlSGTL5000 sgtl5000_1; extern AudioSourceMicroMDAEPiano ep; -extern AudioEffectFreeverb freeverb_r; -extern AudioEffectFreeverb freeverb_l; +#ifndef PATCHED_FREEVERB +extern AudioEffectFreeverb freeverb_r; +extern AudioEffectFreeverb freeverb_l; +#else +extern MyAudioEffectFreeverb freeverb_r; +extern MyAudioEffectFreeverb freeverb_l; +#endif extern AudioSynthWaveform modulator; extern AudioEffectModulatedDelay modchorus_r; extern AudioEffectModulatedDelay modchorus_l; diff --git a/config.h b/config.h index fc92701..adb55e1 100644 --- a/config.h +++ b/config.h @@ -68,6 +68,8 @@ #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 PATCHED_FREEVERB 1 + //************************************************************************************************* //* DEBUG OUTPUT SETTINGS //************************************************************************************************* @@ -82,7 +84,7 @@ //* HARDWARE SETTINGS //************************************************************************************************* -//#define USB_AUDIO 1 +#define USB_AUDIO 1 // Teensy Audio Shield: /* Values for SGTL5000_LINEOUT_LEVEL @@ -106,7 +108,7 @@ 30: 1.22 Volts p-p 31: 1.16 Volts p-p */ -#define SGTL5000_LINEOUT_LEVEL 17 +#define SGTL5000_LINEOUT_LEVEL 29 //#define SDCARD_CS_PIN 10 //#define SDCARD_MOSI_PIN 7 //#define SDCARD_SCK_PIN 14 @@ -179,7 +181,7 @@ //* DO NO CHANGE ANYTHING BEYOND IF YOU DON'T KNOW WHAT YOU ARE DOING !!! //************************************************************************************************* -#define MICRO_MDAEPIANO_VERSION "1.0.0 alpha" +#define MICRO_MDAEPIANO_VERSION "1.0.1" /* HELPER MACROS */ #define TIME_MS2SAMPLES(x) floor(uint32_t(x) * AUDIO_SAMPLE_RATE / 1000) diff --git a/my_effect_freeverb.cpp b/my_effect_freeverb.cpp new file mode 100644 index 0000000..01a1842 --- /dev/null +++ b/my_effect_freeverb.cpp @@ -0,0 +1,482 @@ +/* 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 fixed 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 +#include "my_effect_freeverb.h" +#include "utility/dspinst.h" + +MyAudioEffectFreeverb::MyAudioEffectFreeverb() : AudioStream(1, inputQueueArray) +{ + memset(comb1buf, 0, sizeof(comb1buf)); + memset(comb2buf, 0, sizeof(comb2buf)); + memset(comb3buf, 0, sizeof(comb3buf)); + memset(comb4buf, 0, sizeof(comb4buf)); + memset(comb5buf, 0, sizeof(comb5buf)); + memset(comb6buf, 0, sizeof(comb6buf)); + memset(comb7buf, 0, sizeof(comb7buf)); + memset(comb8buf, 0, sizeof(comb8buf)); + comb1index = 0; + comb2index = 0; + comb3index = 0; + comb4index = 0; + comb5index = 0; + comb6index = 0; + comb7index = 0; + comb8index = 0; + comb1filter = 0; + comb2filter = 0; + comb3filter = 0; + comb4filter = 0; + comb5filter = 0; + comb6filter = 0; + comb7filter = 0; + comb8filter = 0; + combdamp1 = 6553; + combdamp2 = 26215; + combfeeback = 27524; + memset(allpass1buf, 0, sizeof(allpass1buf)); + memset(allpass2buf, 0, sizeof(allpass2buf)); + memset(allpass3buf, 0, sizeof(allpass3buf)); + memset(allpass4buf, 0, sizeof(allpass4buf)); + allpass1index = 0; + allpass2index = 0; + allpass3index = 0; + allpass4index = 0; +} + +// cleaner sat16 by http://www.moseleyinstruments.com/ +static int16_t sat16(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; +} + +// 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 MyAudioEffectFreeverb::update() +{ +#if defined(__ARM_ARCH_7EM__) + const audio_block_t *block; + audio_block_t *outblock; + int i; + int16_t input, bufout, output; + int32_t 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 + sum = 0; + + bufout = comb1buf[comb1index]; + sum += bufout; + comb1filter = sat16(bufout * combdamp2 + comb1filter * combdamp1, 15); + comb1buf[comb1index] = sat16(input + sat16(comb1filter * combfeeback, 15), 0); + if (++comb1index >= sizeof(comb1buf)/sizeof(int16_t)) comb1index = 0; + + bufout = comb2buf[comb2index]; + sum += bufout; + comb2filter = sat16(bufout * combdamp2 + comb2filter * combdamp1, 15); + comb2buf[comb2index] = sat16(input + sat16(comb2filter * combfeeback, 15), 0); + if (++comb2index >= sizeof(comb2buf)/sizeof(int16_t)) comb2index = 0; + + bufout = comb3buf[comb3index]; + sum += bufout; + comb3filter = sat16(bufout * combdamp2 + comb3filter * combdamp1, 15); + comb3buf[comb3index] = sat16(input + sat16(comb3filter * combfeeback, 15), 0); + if (++comb3index >= sizeof(comb3buf)/sizeof(int16_t)) comb3index = 0; + + bufout = comb4buf[comb4index]; + sum += bufout; + comb4filter = sat16(bufout * combdamp2 + comb4filter * combdamp1, 15); + comb4buf[comb4index] = sat16(input + sat16(comb4filter * combfeeback, 15), 0); + if (++comb4index >= sizeof(comb4buf)/sizeof(int16_t)) comb4index = 0; + + bufout = comb5buf[comb5index]; + sum += bufout; + comb5filter = sat16(bufout * combdamp2 + comb5filter * combdamp1, 15); + comb5buf[comb5index] = sat16(input + sat16(comb5filter * combfeeback, 15), 0); + if (++comb5index >= sizeof(comb5buf)/sizeof(int16_t)) comb5index = 0; + + bufout = comb6buf[comb6index]; + sum += bufout; + comb6filter = sat16(bufout * combdamp2 + comb6filter * combdamp1, 15); + comb6buf[comb6index] = sat16(input + sat16(comb6filter * combfeeback, 15), 0); + if (++comb6index >= sizeof(comb6buf)/sizeof(int16_t)) comb6index = 0; + + bufout = comb7buf[comb7index]; + sum += bufout; + comb7filter = sat16(bufout * combdamp2 + comb7filter * combdamp1, 15); + comb7buf[comb7index] = sat16(input + sat16(comb7filter * combfeeback, 15), 0); + if (++comb7index >= sizeof(comb7buf)/sizeof(int16_t)) comb7index = 0; + + bufout = comb8buf[comb8index]; + sum += bufout; + comb8filter = sat16(bufout * combdamp2 + comb8filter * combdamp1, 15); + comb8buf[comb8index] = sat16(input + sat16(comb8filter * combfeeback, 15), 0); + if (++comb8index >= sizeof(comb8buf)/sizeof(int16_t)) comb8index = 0; + + output = sat16(sum * 31457, 17); + + bufout = allpass1buf[allpass1index]; + allpass1buf[allpass1index] = output + (bufout >> 1); + output = sat16(bufout - output, 1); + if (++allpass1index >= sizeof(allpass1buf)/sizeof(int16_t)) allpass1index = 0; + + bufout = allpass2buf[allpass2index]; + allpass2buf[allpass2index] = output + (bufout >> 1); + output = sat16(bufout - output, 1); + if (++allpass2index >= sizeof(allpass2buf)/sizeof(int16_t)) allpass2index = 0; + + bufout = allpass3buf[allpass3index]; + allpass3buf[allpass3index] = output + (bufout >> 1); + output = sat16(bufout - output, 1); + if (++allpass3index >= sizeof(allpass3buf)/sizeof(int16_t)) allpass3index = 0; + + bufout = allpass4buf[allpass4index]; + allpass4buf[allpass4index] = output + (bufout >> 1); + output = sat16(bufout - output, 1); + if (++allpass4index >= sizeof(allpass4buf)/sizeof(int16_t)) allpass4index = 0; + + outblock->data[i] = sat16(output * 30, 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 +} + + +MyAudioEffectFreeverbStereo::MyAudioEffectFreeverbStereo() : AudioStream(1, inputQueueArray) +{ + memset(comb1bufL, 0, sizeof(comb1bufL)); + memset(comb2bufL, 0, sizeof(comb2bufL)); + memset(comb3bufL, 0, sizeof(comb3bufL)); + memset(comb4bufL, 0, sizeof(comb4bufL)); + memset(comb5bufL, 0, sizeof(comb5bufL)); + memset(comb6bufL, 0, sizeof(comb6bufL)); + memset(comb7bufL, 0, sizeof(comb7bufL)); + memset(comb8bufL, 0, sizeof(comb8bufL)); + comb1indexL = 0; + comb2indexL = 0; + comb3indexL = 0; + comb4indexL = 0; + comb5indexL = 0; + comb6indexL = 0; + comb7indexL = 0; + comb8indexL = 0; + comb1filterL = 0; + comb2filterL = 0; + comb3filterL = 0; + comb4filterL = 0; + comb5filterL = 0; + comb6filterL = 0; + comb7filterL = 0; + comb8filterL = 0; + memset(comb1bufR, 0, sizeof(comb1bufR)); + memset(comb2bufR, 0, sizeof(comb2bufR)); + memset(comb3bufR, 0, sizeof(comb3bufR)); + memset(comb4bufR, 0, sizeof(comb4bufR)); + memset(comb5bufR, 0, sizeof(comb5bufR)); + memset(comb6bufR, 0, sizeof(comb6bufR)); + memset(comb7bufR, 0, sizeof(comb7bufR)); + memset(comb8bufR, 0, sizeof(comb8bufR)); + comb1indexR = 0; + comb2indexR = 0; + comb3indexR = 0; + comb4indexR = 0; + comb5indexR = 0; + comb6indexR = 0; + comb7indexR = 0; + comb8indexR = 0; + comb1filterR = 0; + comb2filterR = 0; + comb3filterR = 0; + comb4filterR = 0; + comb5filterR = 0; + comb6filterR = 0; + comb7filterR = 0; + comb8filterR = 0; + combdamp1 = 6553; + combdamp2 = 26215; + combfeeback = 27524; + memset(allpass1bufL, 0, sizeof(allpass1bufL)); + memset(allpass2bufL, 0, sizeof(allpass2bufL)); + memset(allpass3bufL, 0, sizeof(allpass3bufL)); + memset(allpass4bufL, 0, sizeof(allpass4bufL)); + allpass1indexL = 0; + allpass2indexL = 0; + allpass3indexL = 0; + allpass4indexL = 0; + memset(allpass1bufR, 0, sizeof(allpass1bufR)); + memset(allpass2bufR, 0, sizeof(allpass2bufR)); + memset(allpass3bufR, 0, sizeof(allpass3bufR)); + memset(allpass4bufR, 0, sizeof(allpass4bufR)); + allpass1indexR = 0; + allpass2indexR = 0; + allpass3indexR = 0; + allpass4indexR = 0; +} + +void MyAudioEffectFreeverbStereo::update() +{ +#if defined(__ARM_ARCH_7EM__) + const audio_block_t *block; + audio_block_t *outblockL; + audio_block_t *outblockR; + int i; + int16_t input, bufout, outputL, outputR; + int32_t 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, 17); // for numerical headroom + sum = 0; + + bufout = comb1bufL[comb1indexL]; + sum += bufout; + comb1filterL = sat16(bufout * combdamp2 + comb1filterL * combdamp1, 15); + comb1bufL[comb1indexL] = sat16(input + sat16(comb1filterL * combfeeback, 15), 0); + if (++comb1indexL >= sizeof(comb1bufL)/sizeof(int16_t)) comb1indexL = 0; + + bufout = comb2bufL[comb2indexL]; + sum += bufout; + comb2filterL = sat16(bufout * combdamp2 + comb2filterL * combdamp1, 15); + comb2bufL[comb2indexL] = sat16(input + sat16(comb2filterL * combfeeback, 15), 0); + if (++comb2indexL >= sizeof(comb2bufL)/sizeof(int16_t)) comb2indexL = 0; + + bufout = comb3bufL[comb3indexL]; + sum += bufout; + comb3filterL = sat16(bufout * combdamp2 + comb3filterL * combdamp1, 15); + comb3bufL[comb3indexL] = sat16(input + sat16(comb3filterL * combfeeback, 15), 0); + if (++comb3indexL >= sizeof(comb3bufL)/sizeof(int16_t)) comb3indexL = 0; + + bufout = comb4bufL[comb4indexL]; + sum += bufout; + comb4filterL = sat16(bufout * combdamp2 + comb4filterL * combdamp1, 15); + comb4bufL[comb4indexL] = sat16(input + sat16(comb4filterL * combfeeback, 15), 0); + if (++comb4indexL >= sizeof(comb4bufL)/sizeof(int16_t)) comb4indexL = 0; + + bufout = comb5bufL[comb5indexL]; + sum += bufout; + comb5filterL = sat16(bufout * combdamp2 + comb5filterL * combdamp1, 15); + comb5bufL[comb5indexL] = sat16(input + sat16(comb5filterL * combfeeback, 15), 0); + 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 +} diff --git a/my_effect_freeverb.h b/my_effect_freeverb.h new file mode 100644 index 0000000..e3c612a --- /dev/null +++ b/my_effect_freeverb.h @@ -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 +#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