WLED/usermods/audioreactive/audio_reactive.h

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#pragma once
#include "wled.h"
#include <driver/i2s.h>
#include <driver/adc.h>
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#ifndef ARDUINO_ARCH_ESP32
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#error This audio reactive usermod does not support the ESP8266.
#endif
#if defined(WLED_DEBUG) || defined(SR_DEBUG)
#include <esp_timer.h>
#endif
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/*
* Usermods allow you to add own functionality to WLED more easily
* See: https://github.com/Aircoookie/WLED/wiki/Add-own-functionality
*
* This is an audioreactive v2 usermod.
* ....
*/
// Comment/Uncomment to toggle usb serial debugging
// #define MIC_LOGGER // MIC sampling & sound input debugging (serial plotter)
// #define FFT_SAMPLING_LOG // FFT result debugging
// #define SR_DEBUG // generic SR DEBUG messages
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#ifdef SR_DEBUG
#define DEBUGSR_PRINT(x) DEBUGOUT.print(x)
#define DEBUGSR_PRINTLN(x) DEBUGOUT.println(x)
#define DEBUGSR_PRINTF(x...) DEBUGOUT.printf(x)
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#else
#define DEBUGSR_PRINT(x)
#define DEBUGSR_PRINTLN(x)
#define DEBUGSR_PRINTF(x...)
#endif
#if defined(MIC_LOGGER) || defined(FFT_SAMPLING_LOG)
#define PLOT_PRINT(x) DEBUGOUT.print(x)
#define PLOT_PRINTLN(x) DEBUGOUT.println(x)
#define PLOT_PRINTF(x...) DEBUGOUT.printf(x)
#else
#define PLOT_PRINT(x)
#define PLOT_PRINTLN(x)
#define PLOT_PRINTF(x...)
#endif
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// use audio source class (ESP32 specific)
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#include "audio_source.h"
constexpr i2s_port_t I2S_PORT = I2S_NUM_0; // I2S port to use (do not change !)
constexpr int BLOCK_SIZE = 128; // I2S buffer size (samples)
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// globals
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static uint8_t inputLevel = 128; // UI slider value
#ifndef SR_SQUELCH
uint8_t soundSquelch = 10; // squelch value for volume reactive routines (config value)
#else
uint8_t soundSquelch = SR_SQUELCH; // squelch value for volume reactive routines (config value)
#endif
#ifndef SR_GAIN
uint8_t sampleGain = 60; // sample gain (config value)
#else
uint8_t sampleGain = SR_GAIN; // sample gain (config value)
#endif
static uint8_t soundAgc = 1; // Automagic gain control: 0 - none, 1 - normal, 2 - vivid, 3 - lazy (config value)
static uint8_t audioSyncEnabled = 0; // bit field: bit 0 - send, bit 1 - receive (config value)
static bool udpSyncConnected = false; // UDP connection status -> true if connected to multicast group
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// user settable parameters for limitSoundDynamics()
static bool limiterOn = true; // bool: enable / disable dynamics limiter
static uint16_t attackTime = 80; // int: attack time in milliseconds. Default 0.08sec
static uint16_t decayTime = 1400; // int: decay time in milliseconds. Default 1.40sec
// user settable options for FFTResult scaling
static uint8_t FFTScalingMode = 3; // 0 none; 1 optimized logarithmic; 2 optimized linear; 3 optimized sqare root
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//
// AGC presets
// Note: in C++, "const" implies "static" - no need to explicitly declare everything as "static const"
//
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#define AGC_NUM_PRESETS 3 // AGC presets: normal, vivid, lazy
const double agcSampleDecay[AGC_NUM_PRESETS] = { 0.9994f, 0.9985f, 0.9997f}; // decay factor for sampleMax, in case the current sample is below sampleMax
const float agcZoneLow[AGC_NUM_PRESETS] = { 32, 28, 36}; // low volume emergency zone
const float agcZoneHigh[AGC_NUM_PRESETS] = { 240, 240, 248}; // high volume emergency zone
const float agcZoneStop[AGC_NUM_PRESETS] = { 336, 448, 304}; // disable AGC integrator if we get above this level
const float agcTarget0[AGC_NUM_PRESETS] = { 112, 144, 164}; // first AGC setPoint -> between 40% and 65%
const float agcTarget0Up[AGC_NUM_PRESETS] = { 88, 64, 116}; // setpoint switching value (a poor man's bang-bang)
const float agcTarget1[AGC_NUM_PRESETS] = { 220, 224, 216}; // second AGC setPoint -> around 85%
const double agcFollowFast[AGC_NUM_PRESETS] = { 1/192.f, 1/128.f, 1/256.f}; // quickly follow setpoint - ~0.15 sec
const double agcFollowSlow[AGC_NUM_PRESETS] = {1/6144.f,1/4096.f,1/8192.f}; // slowly follow setpoint - ~2-15 secs
const double agcControlKp[AGC_NUM_PRESETS] = { 0.6f, 1.5f, 0.65f}; // AGC - PI control, proportional gain parameter
const double agcControlKi[AGC_NUM_PRESETS] = { 1.7f, 1.85f, 1.2f}; // AGC - PI control, integral gain parameter
const float agcSampleSmooth[AGC_NUM_PRESETS] = { 1/12.f, 1/6.f, 1/16.f}; // smoothing factor for sampleAgc (use rawSampleAgc if you want the non-smoothed value)
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// AGC presets end
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static AudioSource *audioSource = nullptr;
static volatile bool disableSoundProcessing = false; // if true, sound processing (FFT, filters, AGC) will be suspended. "volatile" as its shared between tasks.
static bool useBandPassFilter = false; // if true, enables a bandpass filter 80Hz-16Khz to remove noise. Applies before FFT.
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// audioreactive variables shared with FFT task
static float micDataReal = 0.0f; // MicIn data with full 24bit resolution - lowest 8bit after decimal point
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static float multAgc = 1.0f; // sample * multAgc = sampleAgc. Our AGC multiplier
static float sampleAvg = 0.0f; // Smoothed Average sample - sampleAvg < 1 means "quiet" (simple noise gate)
static float sampleAgc = 0.0f; // Smoothed AGC sample
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// peak detection
static bool samplePeak = false; // Boolean flag for peak - used in effects. Responding routine may reset this flag. Auto-reset after strip.getMinShowDelay()
static uint8_t maxVol = 10; // Reasonable value for constant volume for 'peak detector', as it won't always trigger (deprecated)
static uint8_t binNum = 8; // Used to select the bin for FFT based beat detection (deprecated)
static bool udpSamplePeak = false; // Boolean flag for peak. Set at the same tiem as samplePeak, but reset by transmitAudioData
static unsigned long timeOfPeak = 0; // time of last sample peak detection.
static void detectSamplePeak(void); // peak detection function (needs scaled FFT reasults in vReal[])
static void autoResetPeak(void); // peak auto-reset function
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////////////////////
// Begin FFT Code //
////////////////////
// some prototypes, to ensure consistent interfaces
static float mapf(float x, float in_min, float in_max, float out_min, float out_max); // map function for float
static float fftAddAvg(int from, int to); // average of several FFT result bins
void FFTcode(void * parameter); // audio processing task: read samples, run FFT, fill GEQ channels from FFT results
static void runMicFilter(uint16_t numSamples, float *sampleBuffer); // pre-filtering of raw samples (band-pass)
static void postProcessFFTResults(bool noiseGateOpen, int numberOfChannels); // post-processing and post-amp of GEQ channels
#define NUM_GEQ_CHANNELS 16 // number of frequency channels. Don't change !!
static TaskHandle_t FFT_Task = nullptr;
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// Table of multiplication factors so that we can even out the frequency response.
static float fftResultPink[NUM_GEQ_CHANNELS] = { 1.70f, 1.71f, 1.73f, 1.78f, 1.68f, 1.56f, 1.55f, 1.63f, 1.79f, 1.62f, 1.80f, 2.06f, 2.47f, 3.35f, 6.83f, 9.55f };
// globals and FFT Output variables shared with animations
static float FFT_MajorPeak = 1.0f; // FFT: strongest (peak) frequency
static float FFT_Magnitude = 0.0f; // FFT: volume (magnitude) of peak frequency
static uint8_t fftResult[NUM_GEQ_CHANNELS]= {0};// Our calculated freq. channel result table to be used by effects
#if defined(WLED_DEBUG) || defined(SR_DEBUG)
static uint64_t fftTime = 0;
static uint64_t sampleTime = 0;
#endif
// FFT Task variables (filtering and post-processing)
static float fftCalc[NUM_GEQ_CHANNELS] = {0.0f}; // Try and normalize fftBin values to a max of 4096, so that 4096/16 = 256.
static float fftAvg[NUM_GEQ_CHANNELS] = {0.0f}; // Calculated frequency channel results, with smoothing (used if dynamics limiter is ON)
#ifdef SR_DEBUG
static float fftResultMax[NUM_GEQ_CHANNELS] = {0.0f}; // A table used for testing to determine how our post-processing is working.
#endif
// audio source parameters and constant
constexpr SRate_t SAMPLE_RATE = 22050; // Base sample rate in Hz - 22Khz is a standard rate. Physical sample time -> 23ms
//constexpr SRate_t SAMPLE_RATE = 16000; // 16kHz - use if FFTtask takes more than 20ms. Physical sample time -> 32ms
//constexpr SRate_t SAMPLE_RATE = 20480; // Base sample rate in Hz - 20Khz is experimental. Physical sample time -> 25ms
//constexpr SRate_t SAMPLE_RATE = 10240; // Base sample rate in Hz - previous default. Physical sample time -> 50ms
#define FFT_MIN_CYCLE 21 // minimum time before FFT task is repeated. Use with 22Khz sampling
//#define FFT_MIN_CYCLE 30 // Use with 16Khz sampling
//#define FFT_MIN_CYCLE 23 // minimum time before FFT task is repeated. Use with 20Khz sampling
//#define FFT_MIN_CYCLE 46 // minimum time before FFT task is repeated. Use with 10Khz sampling
// FFT Constants
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constexpr uint16_t samplesFFT = 512; // Samples in an FFT batch - This value MUST ALWAYS be a power of 2
constexpr uint16_t samplesFFT_2 = 256; // meaningfull part of FFT results - only the "lower half" contains useful information.
// the following are observed values, supported by a bit of "educated guessing"
//#define FFT_DOWNSCALE 0.65f // 20kHz - downscaling factor for FFT results - "Flat-Top" window @20Khz, old freq channels
#define FFT_DOWNSCALE 0.46f // downscaling factor for FFT results - for "Flat-Top" window @22Khz, new freq channels
#define LOG_256 5.54517744f // log(256)
// These are the input and output vectors. Input vectors receive computed results from FFT.
static float vReal[samplesFFT] = {0.0f}; // FFT sample inputs / freq output - these are our raw result bins
static float vImag[samplesFFT] = {0.0f}; // imaginary parts
#ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
static float windowWeighingFactors[samplesFFT] = {0.0f};
#endif
// Create FFT object
#ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
// lib_deps += https://github.com/kosme/arduinoFFT#develop @ 1.9.2
#define FFT_SPEED_OVER_PRECISION // enables use of reciprocals (1/x etc), and an a few other speedups
#define FFT_SQRT_APPROXIMATION // enables "quake3" style inverse sqrt
#define sqrt(x) sqrtf(x) // little hack that reduces FFT time by 50% on ESP32 (as alternative to FFT_SQRT_APPROXIMATION)
#else
// lib_deps += https://github.com/blazoncek/arduinoFFT.git
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#endif
#include <arduinoFFT.h>
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#ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
static ArduinoFFT<float> FFT = ArduinoFFT<float>( vReal, vImag, samplesFFT, SAMPLE_RATE, windowWeighingFactors);
#else
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static arduinoFFT FFT = arduinoFFT(vReal, vImag, samplesFFT, SAMPLE_RATE);
#endif
// Helper functions
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// float version of map()
static float mapf(float x, float in_min, float in_max, float out_min, float out_max){
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
// compute average of several FFT resut bins
static float fftAddAvg(int from, int to) {
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float result = 0.0f;
for (int i = from; i <= to; i++) {
result += vReal[i];
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}
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return result / float(to - from + 1);
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}
//
// FFT main task
//
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void FFTcode(void * parameter)
{
DEBUGSR_PRINT("FFT started on core: "); DEBUGSR_PRINTLN(xPortGetCoreID());
// see https://www.freertos.org/vtaskdelayuntil.html
const TickType_t xFrequency = FFT_MIN_CYCLE * portTICK_PERIOD_MS;
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TickType_t xLastWakeTime = xTaskGetTickCount();
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for(;;) {
delay(1); // DO NOT DELETE THIS LINE! It is needed to give the IDLE(0) task enough time and to keep the watchdog happy.
// taskYIELD(), yield(), vTaskDelay() and esp_task_wdt_feed() didn't seem to work.
// Don't run FFT computing code if we're in Receive mode or in realtime mode
if (disableSoundProcessing || (audioSyncEnabled & 0x02)) {
vTaskDelayUntil( &xLastWakeTime, xFrequency); // release CPU, and let I2S fill its buffers
continue;
}
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#if defined(WLED_DEBUG) || defined(SR_DEBUG)
uint64_t start = esp_timer_get_time();
bool haveDoneFFT = false; // indicates if second measurement (FFT time) is valid
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#endif
// get a fresh batch of samples from I2S
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if (audioSource) audioSource->getSamples(vReal, samplesFFT);
#if defined(WLED_DEBUG) || defined(SR_DEBUG)
if (start < esp_timer_get_time()) { // filter out overflows
uint64_t sampleTimeInMillis = (esp_timer_get_time() - start +5ULL) / 10ULL; // "+5" to ensure proper rounding
sampleTime = (sampleTimeInMillis*3 + sampleTime*7)/10; // smooth
}
start = esp_timer_get_time(); // start measuring FFT time
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#endif
xLastWakeTime = xTaskGetTickCount(); // update "last unblocked time" for vTaskDelay
// band pass filter - can reduce noise floor by a factor of 50
// downside: frequencies below 100Hz will be ignored
if (useBandPassFilter) runMicFilter(samplesFFT, vReal);
// find highest sample in the batch
float maxSample = 0.0f; // max sample from FFT batch
for (int i=0; i < samplesFFT; i++) {
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// set imaginary parts to 0
vImag[i] = 0;
// pick our our current mic sample - we take the max value from all samples that go into FFT
if ((vReal[i] <= (INT16_MAX - 1024)) && (vReal[i] >= (INT16_MIN + 1024))) //skip extreme values - normally these are artefacts
if (fabsf((float)vReal[i]) > maxSample) maxSample = fabsf((float)vReal[i]);
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}
// release highest sample to volume reactive effects early - not strictly necessary here - could also be done at the end of the function
// early release allows the filters (getSample() and agcAvg()) to work with fresh values - we will have matching gain and noise gate values when we want to process the FFT results.
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micDataReal = maxSample;
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#ifdef SR_DEBUG
if (true) { // this allows measure FFT runtimes, as it disables the "only when needed" optimization
#else
if (sampleAvg > 0.25f) { // noise gate open means that FFT results will be used. Don't run FFT if results are not needed.
#endif
// run FFT (takes 3-5ms on ESP32, ~12ms on ESP32-S2)
#ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
FFT.dcRemoval(); // remove DC offset
FFT.windowing( FFTWindow::Flat_top, FFTDirection::Forward); // Weigh data using "Flat Top" function - better amplitude accuracy
//FFT.windowing(FFTWindow::Blackman_Harris, FFTDirection::Forward); // Weigh data using "Blackman- Harris" window - sharp peaks due to excellent sideband rejection
FFT.compute( FFTDirection::Forward ); // Compute FFT
FFT.complexToMagnitude(); // Compute magnitudes
#else
FFT.DCRemoval(); // let FFT lib remove DC component, so we don't need to care about this in getSamples()
//FFT.Windowing( FFT_WIN_TYP_HAMMING, FFT_FORWARD ); // Weigh data - standard Hamming window
//FFT.Windowing( FFT_WIN_TYP_BLACKMAN, FFT_FORWARD ); // Blackman window - better side freq rejection
//FFT.Windowing( FFT_WIN_TYP_BLACKMAN_HARRIS, FFT_FORWARD );// Blackman-Harris - excellent sideband rejection
FFT.Windowing( FFT_WIN_TYP_FLT_TOP, FFT_FORWARD ); // Flat Top Window - better amplitude accuracy
FFT.Compute( FFT_FORWARD ); // Compute FFT
FFT.ComplexToMagnitude(); // Compute magnitudes
#endif
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#ifdef UM_AUDIOREACTIVE_USE_NEW_FFT
FFT.majorPeak(FFT_MajorPeak, FFT_Magnitude); // let the effects know which freq was most dominant
#else
FFT.MajorPeak(&FFT_MajorPeak, &FFT_Magnitude); // let the effects know which freq was most dominant
#endif
FFT_MajorPeak = constrain(FFT_MajorPeak, 1.0f, 11025.0f); // restrict value to range expected by effects
#if defined(WLED_DEBUG) || defined(SR_DEBUG)
haveDoneFFT = true;
#endif
} else { // noise gate closed - only clear results as FFT was skipped. MIC samples are still valid when we do this.
memset(vReal, 0, sizeof(vReal));
FFT_MajorPeak = 1;
FFT_Magnitude = 0.001;
}
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for (int i = 0; i < samplesFFT; i++) {
float t = fabsf(vReal[i]); // just to be sure - values in fft bins should be positive any way
vReal[i] = t / 16.0f; // Reduce magnitude. Want end result to be scaled linear and ~4096 max.
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} // for()
// mapping of FFT result bins to frequency channels
if (fabsf(sampleAvg) > 0.5f) { // noise gate open
#if 0
/* This FFT post processing is a DIY endeavour. What we really need is someone with sound engineering expertise to do a great job here AND most importantly, that the animations look GREAT as a result.
*
* Andrew's updated mapping of 256 bins down to the 16 result bins with Sample Freq = 10240, samplesFFT = 512 and some overlap.
* Based on testing, the lowest/Start frequency is 60 Hz (with bin 3) and a highest/End frequency of 5120 Hz in bin 255.
* Now, Take the 60Hz and multiply by 1.320367784 to get the next frequency and so on until the end. Then detetermine the bins.
* End frequency = Start frequency * multiplier ^ 16
* Multiplier = (End frequency/ Start frequency) ^ 1/16
* Multiplier = 1.320367784
*/ // Range
fftCalc[ 0] = fftAddAvg(2,4); // 60 - 100
fftCalc[ 1] = fftAddAvg(4,5); // 80 - 120
fftCalc[ 2] = fftAddAvg(5,7); // 100 - 160
fftCalc[ 3] = fftAddAvg(7,9); // 140 - 200
fftCalc[ 4] = fftAddAvg(9,12); // 180 - 260
fftCalc[ 5] = fftAddAvg(12,16); // 240 - 340
fftCalc[ 6] = fftAddAvg(16,21); // 320 - 440
fftCalc[ 7] = fftAddAvg(21,29); // 420 - 600
fftCalc[ 8] = fftAddAvg(29,37); // 580 - 760
fftCalc[ 9] = fftAddAvg(37,48); // 740 - 980
fftCalc[10] = fftAddAvg(48,64); // 960 - 1300
fftCalc[11] = fftAddAvg(64,84); // 1280 - 1700
fftCalc[12] = fftAddAvg(84,111); // 1680 - 2240
fftCalc[13] = fftAddAvg(111,147); // 2220 - 2960
fftCalc[14] = fftAddAvg(147,194); // 2940 - 3900
fftCalc[15] = fftAddAvg(194,250); // 3880 - 5000 // avoid the last 5 bins, which are usually inaccurate
#else
/* new mapping, optimized for 22050 Hz by softhack007 */
// bins frequency range
if (useBandPassFilter) {
// skip frequencies below 100hz
fftCalc[ 0] = 0.8f * fftAddAvg(3,4);
fftCalc[ 1] = 0.9f * fftAddAvg(4,5);
fftCalc[ 2] = fftAddAvg(5,6);
fftCalc[ 3] = fftAddAvg(6,7);
// don't use the last bins from 206 to 255.
fftCalc[15] = fftAddAvg(165,205) * 0.75f; // 40 7106 - 8828 high -- with some damping
} else {
fftCalc[ 0] = fftAddAvg(1,2); // 1 43 - 86 sub-bass
fftCalc[ 1] = fftAddAvg(2,3); // 1 86 - 129 bass
fftCalc[ 2] = fftAddAvg(3,5); // 2 129 - 216 bass
fftCalc[ 3] = fftAddAvg(5,7); // 2 216 - 301 bass + midrange
// don't use the last bins from 216 to 255. They are usually contaminated by aliasing (aka noise)
fftCalc[15] = fftAddAvg(165,215) * 0.70f; // 50 7106 - 9259 high -- with some damping
}
fftCalc[ 4] = fftAddAvg(7,10); // 3 301 - 430 midrange
fftCalc[ 5] = fftAddAvg(10,13); // 3 430 - 560 midrange
fftCalc[ 6] = fftAddAvg(13,19); // 5 560 - 818 midrange
fftCalc[ 7] = fftAddAvg(19,26); // 7 818 - 1120 midrange -- 1Khz should always be the center !
fftCalc[ 8] = fftAddAvg(26,33); // 7 1120 - 1421 midrange
fftCalc[ 9] = fftAddAvg(33,44); // 9 1421 - 1895 midrange
fftCalc[10] = fftAddAvg(44,56); // 12 1895 - 2412 midrange + high mid
fftCalc[11] = fftAddAvg(56,70); // 14 2412 - 3015 high mid
fftCalc[12] = fftAddAvg(70,86); // 16 3015 - 3704 high mid
fftCalc[13] = fftAddAvg(86,104); // 18 3704 - 4479 high mid
fftCalc[14] = fftAddAvg(104,165) * 0.88f; // 61 4479 - 7106 high mid + high -- with slight damping
#endif
} else { // noise gate closed - just decay old values
for (int i=0; i < NUM_GEQ_CHANNELS; i++) {
fftCalc[i] *= 0.85f; // decay to zero
if (fftCalc[i] < 4.0f) fftCalc[i] = 0.0f;
}
}
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// post-processing of frequency channels (pink noise adjustment, AGC, smooting, scaling)
postProcessFFTResults((fabsf(sampleAvg) > 0.25f)? true : false , NUM_GEQ_CHANNELS);
#if defined(WLED_DEBUG) || defined(SR_DEBUG)
if (haveDoneFFT && (start < esp_timer_get_time())) { // filter out overflows
uint64_t fftTimeInMillis = ((esp_timer_get_time() - start) +5ULL) / 10ULL; // "+5" to ensure proper rounding
fftTime = (fftTimeInMillis*3 + fftTime*7)/10; // smooth
}
#endif
// run peak detection
autoResetPeak();
detectSamplePeak();
#if !defined(I2S_GRAB_ADC1_COMPLETELY)
if ((audioSource == nullptr) || (audioSource->getType() != AudioSource::Type_I2SAdc)) // the "delay trick" does not help for analog ADC
#endif
vTaskDelayUntil( &xLastWakeTime, xFrequency); // release CPU, and let I2S fill its buffers
} // for(;;)ever
} // FFTcode() task end
///////////////////////////
// Pre / Postprocessing //
///////////////////////////
static void runMicFilter(uint16_t numSamples, float *sampleBuffer) // pre-filtering of raw samples (band-pass)
{
// low frequency cutoff parameter - see https://dsp.stackexchange.com/questions/40462/exponential-moving-average-cut-off-frequency
//constexpr float alpha = 0.04f; // 150Hz
//constexpr float alpha = 0.03f; // 110Hz
constexpr float alpha = 0.0225f; // 80hz
//constexpr float alpha = 0.01693f;// 60hz
// high frequency cutoff parameter
//constexpr float beta1 = 0.75f; // 11Khz
//constexpr float beta1 = 0.82f; // 15Khz
//constexpr float beta1 = 0.8285f; // 18Khz
constexpr float beta1 = 0.85f; // 20Khz
constexpr float beta2 = (1.0f - beta1) / 2.0;
static float last_vals[2] = { 0.0f }; // FIR high freq cutoff filter
static float lowfilt = 0.0f; // IIR low frequency cutoff filter
for (int i=0; i < numSamples; i++) {
// FIR lowpass, to remove high frequency noise
float highFilteredSample;
if (i < (numSamples-1)) highFilteredSample = beta1*sampleBuffer[i] + beta2*last_vals[0] + beta2*sampleBuffer[i+1]; // smooth out spikes
else highFilteredSample = beta1*sampleBuffer[i] + beta2*last_vals[0] + beta2*last_vals[1]; // spcial handling for last sample in array
last_vals[1] = last_vals[0];
last_vals[0] = sampleBuffer[i];
sampleBuffer[i] = highFilteredSample;
// IIR highpass, to remove low frequency noise
lowfilt += alpha * (sampleBuffer[i] - lowfilt);
sampleBuffer[i] = sampleBuffer[i] - lowfilt;
}
}
static void postProcessFFTResults(bool noiseGateOpen, int numberOfChannels) // post-processing and post-amp of GEQ channels
{
for (int i=0; i < numberOfChannels; i++) {
if (noiseGateOpen) { // noise gate open
// Adjustment for frequency curves.
fftCalc[i] *= fftResultPink[i];
if (FFTScalingMode > 0) fftCalc[i] *= FFT_DOWNSCALE; // adjustment related to FFT windowing function
// Manual linear adjustment of gain using sampleGain adjustment for different input types.
fftCalc[i] *= soundAgc ? multAgc : ((float)sampleGain/40.0f * (float)inputLevel/128.0f + 1.0f/16.0f); //apply gain, with inputLevel adjustment
if(fftCalc[i] < 0) fftCalc[i] = 0;
}
// smooth results - rise fast, fall slower
if(fftCalc[i] > fftAvg[i]) // rise fast
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fftAvg[i] = fftCalc[i] *0.75f + 0.25f*fftAvg[i]; // will need approx 2 cycles (50ms) for converging against fftCalc[i]
else { // fall slow
if (decayTime < 1000) fftAvg[i] = fftCalc[i]*0.22f + 0.78f*fftAvg[i]; // approx 5 cycles (225ms) for falling to zero
else if (decayTime < 2000) fftAvg[i] = fftCalc[i]*0.17f + 0.83f*fftAvg[i]; // default - approx 9 cycles (225ms) for falling to zero
else if (decayTime < 3000) fftAvg[i] = fftCalc[i]*0.14f + 0.86f*fftAvg[i]; // approx 14 cycles (350ms) for falling to zero
else fftAvg[i] = fftCalc[i]*0.1f + 0.9f*fftAvg[i]; // approx 20 cycles (500ms) for falling to zero
}
// constrain internal vars - just to be sure
fftCalc[i] = constrain(fftCalc[i], 0.0f, 1023.0f);
fftAvg[i] = constrain(fftAvg[i], 0.0f, 1023.0f);
float currentResult;
if(limiterOn == true)
currentResult = fftAvg[i];
else
currentResult = fftCalc[i];
switch (FFTScalingMode) {
case 1:
// Logarithmic scaling
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currentResult *= 0.42; // 42 is the answer ;-)
currentResult -= 8.0; // this skips the lowest row, giving some room for peaks
if (currentResult > 1.0) currentResult = logf(currentResult); // log to base "e", which is the fastest log() function
else currentResult = 0.0; // special handling, because log(1) = 0; log(0) = undefined
currentResult *= 0.85f + (float(i)/18.0f); // extra up-scaling for high frequencies
currentResult = mapf(currentResult, 0, LOG_256, 0, 255); // map [log(1) ... log(255)] to [0 ... 255]
break;
case 2:
// Linear scaling
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currentResult *= 0.30f; // needs a bit more damping, get stay below 255
currentResult -= 4.0; // giving a bit more room for peaks
if (currentResult < 1.0f) currentResult = 0.0f;
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currentResult *= 0.85f + (float(i)/1.8f); // extra up-scaling for high frequencies
break;
case 3:
// square root scaling
currentResult *= 0.38f;
currentResult -= 6.0f;
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if (currentResult > 1.0) currentResult = sqrtf(currentResult);
else currentResult = 0.0; // special handling, because sqrt(0) = undefined
currentResult *= 0.85f + (float(i)/4.5f); // extra up-scaling for high frequencies
currentResult = mapf(currentResult, 0.0, 16.0, 0.0, 255.0); // map [sqrt(1) ... sqrt(256)] to [0 ... 255]
break;
case 0:
default:
// no scaling - leave freq bins as-is
currentResult -= 4; // just a bit more room for peaks
break;
}
// Now, let's dump it all into fftResult. Need to do this, otherwise other routines might grab fftResult values prematurely.
if (soundAgc > 0) { // apply extra "GEQ Gain" if set by user
float post_gain = (float)inputLevel/128.0f;
if (post_gain < 1.0f) post_gain = ((post_gain -1.0f) * 0.8f) +1.0f;
currentResult *= post_gain;
}
fftResult[i] = constrain((int)currentResult, 0, 255);
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}
}
////////////////////
// Peak detection //
////////////////////
// peak detection is called from FFT task when vReal[] contains valid FFT results
static void detectSamplePeak(void) {
bool havePeak = false;
// Poor man's beat detection by seeing if sample > Average + some value.
// This goes through ALL of the 255 bins - but ignores stupid settings
// Then we got a peak, else we don't. The peak has to time out on its own in order to support UDP sound sync.
if ((sampleAvg > 1) && (maxVol > 0) && (binNum > 1) && (vReal[binNum] > maxVol) && ((millis() - timeOfPeak) > 100)) {
havePeak = true;
}
if (havePeak) {
samplePeak = true;
timeOfPeak = millis();
udpSamplePeak = true;
}
}
static void autoResetPeak(void) {
uint16_t MinShowDelay = MAX(50, strip.getMinShowDelay()); // Fixes private class variable compiler error. Unsure if this is the correct way of fixing the root problem. -THATDONFC
if (millis() - timeOfPeak > MinShowDelay) { // Auto-reset of samplePeak after a complete frame has passed.
samplePeak = false;
if (audioSyncEnabled == 0) udpSamplePeak = false; // this is normally reset by transmitAudioData
}
}
////////////////////
// usermod class //
////////////////////
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//class name. Use something descriptive and leave the ": public Usermod" part :)
class AudioReactive : public Usermod {
private:
#ifndef AUDIOPIN
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int8_t audioPin = -1;
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#else
int8_t audioPin = AUDIOPIN;
#endif
#ifndef SR_DMTYPE // I2S mic type
uint8_t dmType = 1; // 0=none/disabled/analog; 1=generic I2S
#define SR_DMTYPE 1 // default type = I2S
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#else
uint8_t dmType = SR_DMTYPE;
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#endif
#ifndef I2S_SDPIN // aka DOUT
int8_t i2ssdPin = 32;
#else
int8_t i2ssdPin = I2S_SDPIN;
#endif
#ifndef I2S_WSPIN // aka LRCL
int8_t i2swsPin = 15;
#else
int8_t i2swsPin = I2S_WSPIN;
#endif
#ifndef I2S_CKPIN // aka BCLK
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int8_t i2sckPin = 14; /*PDM: set to I2S_PIN_NO_CHANGE*/
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#else
int8_t i2sckPin = I2S_CKPIN;
#endif
#ifndef ES7243_SDAPIN
int8_t sdaPin = -1;
#else
int8_t sdaPin = ES7243_SDAPIN;
#endif
#ifndef ES7243_SCLPIN
int8_t sclPin = -1;
#else
int8_t sclPin = ES7243_SCLPIN;
#endif
#ifndef MCLK_PIN
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int8_t mclkPin = I2S_PIN_NO_CHANGE; /* ESP32: only -1, 0, 1, 3 allowed*/
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#else
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int8_t mclkPin = MCLK_PIN;
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#endif
// new "V2" audiosync struct - 40 Bytes
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struct audioSyncPacket {
char header[6]; // 06 Bytes
float sampleRaw; // 04 Bytes - either "sampleRaw" or "rawSampleAgc" depending on soundAgc setting
float sampleSmth; // 04 Bytes - either "sampleAvg" or "sampleAgc" depending on soundAgc setting
uint8_t samplePeak; // 01 Bytes - 0 no peak; >=1 peak detected. In future, this will also provide peak Magnitude
uint8_t reserved1; // 01 Bytes - for future extensions - not used yet
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uint8_t fftResult[16]; // 16 Bytes
float FFT_Magnitude; // 04 Bytes
float FFT_MajorPeak; // 04 Bytes
};
// old "V1" audiosync struct - 83 Bytes - for backwards compatibility
struct audioSyncPacket_v1 {
char header[6]; // 06 Bytes
uint8_t myVals[32]; // 32 Bytes
int sampleAgc; // 04 Bytes
int sampleRaw; // 04 Bytes
float sampleAvg; // 04 Bytes
bool samplePeak; // 01 Bytes
uint8_t fftResult[16]; // 16 Bytes
double FFT_Magnitude; // 08 Bytes
double FFT_MajorPeak; // 08 Bytes
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};
// set your config variables to their boot default value (this can also be done in readFromConfig() or a constructor if you prefer)
bool enabled = false;
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bool initDone = false;
// variables for UDP sound sync
WiFiUDP fftUdp; // UDP object for sound sync (from WiFi UDP, not Async UDP!)
unsigned long lastTime = 0; // last time of running UDP Microphone Sync
const uint16_t delayMs = 10; // I don't want to sample too often and overload WLED
uint16_t audioSyncPort= 11988;// default port for UDP sound sync
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// used for AGC
int last_soundAgc = -1; // used to detect AGC mode change (for resetting AGC internal error buffers)
double control_integrated = 0.0; // persistent across calls to agcAvg(); "integrator control" = accumulated error
// variables used by getSample() and agcAvg()
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int16_t micIn = 0; // Current sample starts with negative values and large values, which is why it's 16 bit signed
double sampleMax = 0.0; // Max sample over a few seconds. Needed for AGC controler.
double micLev = 0.0; // Used to convert returned value to have '0' as minimum. A leveller
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float expAdjF = 0.0f; // Used for exponential filter.
float sampleReal = 0.0f; // "sampleRaw" as float, to provide bits that are lost otherwise (before amplification by sampleGain or inputLevel). Needed for AGC.
int16_t sampleRaw = 0; // Current sample. Must only be updated ONCE!!! (amplified mic value by sampleGain and inputLevel)
int16_t rawSampleAgc = 0; // not smoothed AGC sample
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// variables used in effects
float volumeSmth = 0.0f; // either sampleAvg or sampleAgc depending on soundAgc; smoothed sample
int16_t volumeRaw = 0; // either sampleRaw or rawSampleAgc depending on soundAgc
float my_magnitude =0.0f; // FFT_Magnitude, scaled by multAgc
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// used to feed "Info" Page
unsigned long last_UDPTime = 0; // time of last valid UDP sound sync datapacket
int receivedFormat = 0; // last received UDP sound sync format - 0=none, 1=v1 (0.13.x), 2=v2 (0.14.x)
float maxSample5sec = 0.0f; // max sample (after AGC) in last 5 seconds
unsigned long sampleMaxTimer = 0; // last time maxSample5sec was reset
#define CYCLE_SAMPLEMAX 3500 // time window for merasuring
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// strings to reduce flash memory usage (used more than twice)
static const char _name[];
static const char _enabled[];
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static const char _inputLvl[];
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static const char _analogmic[];
static const char _digitalmic[];
static const char UDP_SYNC_HEADER[];
static const char UDP_SYNC_HEADER_v1[];
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// private methods
////////////////////
// Debug support //
////////////////////
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void logAudio()
{
if (disableSoundProcessing && (!udpSyncConnected || ((audioSyncEnabled & 0x02) == 0))) return; // no audio availeable
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#ifdef MIC_LOGGER
// Debugging functions for audio input and sound processing. Comment out the values you want to see
PLOT_PRINT("micReal:"); PLOT_PRINT(micDataReal); PLOT_PRINT("\t");
PLOT_PRINT("volumeSmth:"); PLOT_PRINT(volumeSmth); PLOT_PRINT("\t");
//PLOT_PRINT("volumeRaw:"); PLOT_PRINT(volumeRaw); PLOT_PRINT("\t");
PLOT_PRINT("DC_Level:"); PLOT_PRINT(micLev); PLOT_PRINT("\t");
//PLOT_PRINT("sampleAgc:"); PLOT_PRINT(sampleAgc); PLOT_PRINT("\t");
//PLOT_PRINT("sampleAvg:"); PLOT_PRINT(sampleAvg); PLOT_PRINT("\t");
//PLOT_PRINT("sampleReal:"); PLOT_PRINT(sampleReal); PLOT_PRINT("\t");
//PLOT_PRINT("micIn:"); PLOT_PRINT(micIn); PLOT_PRINT("\t");
//PLOT_PRINT("sample:"); PLOT_PRINT(sample); PLOT_PRINT("\t");
//PLOT_PRINT("sampleMax:"); PLOT_PRINT(sampleMax); PLOT_PRINT("\t");
//PLOT_PRINT("samplePeak:"); PLOT_PRINT((samplePeak!=0) ? 128:0); PLOT_PRINT("\t");
//PLOT_PRINT("multAgc:"); PLOT_PRINT(multAgc, 4); PLOT_PRINT("\t");
PLOT_PRINTLN();
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#endif
#ifdef FFT_SAMPLING_LOG
#if 0
for(int i=0; i<NUM_GEQ_CHANNELS; i++) {
PLOT_PRINT(fftResult[i]);
PLOT_PRINT("\t");
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}
PLOT_PRINTLN();
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#endif
// OPTIONS are in the following format: Description \n Option
//
// Set true if wanting to see all the bands in their own vertical space on the Serial Plotter, false if wanting to see values in Serial Monitor
const bool mapValuesToPlotterSpace = false;
// Set true to apply an auto-gain like setting to to the data (this hasn't been tested recently)
const bool scaleValuesFromCurrentMaxVal = false;
// prints the max value seen in the current data
const bool printMaxVal = false;
// prints the min value seen in the current data
const bool printMinVal = false;
// if !scaleValuesFromCurrentMaxVal, we scale values from [0..defaultScalingFromHighValue] to [0..scalingToHighValue], lower this if you want to see smaller values easier
const int defaultScalingFromHighValue = 256;
// Print values to terminal in range of [0..scalingToHighValue] if !mapValuesToPlotterSpace, or [(i)*scalingToHighValue..(i+1)*scalingToHighValue] if mapValuesToPlotterSpace
const int scalingToHighValue = 256;
// set higher if using scaleValuesFromCurrentMaxVal and you want a small value that's also the current maxVal to look small on the plotter (can't be 0 to avoid divide by zero error)
const int minimumMaxVal = 1;
int maxVal = minimumMaxVal;
int minVal = 0;
for(int i = 0; i < NUM_GEQ_CHANNELS; i++) {
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if(fftResult[i] > maxVal) maxVal = fftResult[i];
if(fftResult[i] < minVal) minVal = fftResult[i];
}
for(int i = 0; i < NUM_GEQ_CHANNELS; i++) {
PLOT_PRINT(i); PLOT_PRINT(":");
PLOT_PRINTF("%04ld ", map(fftResult[i], 0, (scaleValuesFromCurrentMaxVal ? maxVal : defaultScalingFromHighValue), (mapValuesToPlotterSpace*i*scalingToHighValue)+0, (mapValuesToPlotterSpace*i*scalingToHighValue)+scalingToHighValue-1));
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}
if(printMaxVal) {
PLOT_PRINTF("maxVal:%04d ", maxVal + (mapValuesToPlotterSpace ? 16*256 : 0));
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}
if(printMinVal) {
PLOT_PRINTF("%04d:minVal ", minVal); // printed with value first, then label, so negative values can be seen in Serial Monitor but don't throw off y axis in Serial Plotter
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}
if(mapValuesToPlotterSpace)
PLOT_PRINTF("max:%04d ", (printMaxVal ? 17 : 16)*256); // print line above the maximum value we expect to see on the plotter to avoid autoscaling y axis
else {
PLOT_PRINTF("max:%04d ", 256);
}
PLOT_PRINTLN();
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#endif // FFT_SAMPLING_LOG
} // logAudio()
//////////////////////
// Audio Processing //
//////////////////////
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/*
* A "PI controller" multiplier to automatically adjust sound sensitivity.
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*
* A few tricks are implemented so that sampleAgc does't only utilize 0% and 100%:
* 0. don't amplify anything below squelch (but keep previous gain)
* 1. gain input = maximum signal observed in the last 5-10 seconds
* 2. we use two setpoints, one at ~60%, and one at ~80% of the maximum signal
* 3. the amplification depends on signal level:
* a) normal zone - very slow adjustment
* b) emergency zome (<10% or >90%) - very fast adjustment
*/
void agcAvg(unsigned long the_time)
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{
const int AGC_preset = (soundAgc > 0)? (soundAgc-1): 0; // make sure the _compiler_ knows this value will not change while we are inside the function
float lastMultAgc = multAgc; // last muliplier used
float multAgcTemp = multAgc; // new multiplier
float tmpAgc = sampleReal * multAgc; // what-if amplified signal
float control_error; // "control error" input for PI control
if (last_soundAgc != soundAgc)
control_integrated = 0.0; // new preset - reset integrator
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// For PI controller, we need to have a constant "frequency"
// so let's make sure that the control loop is not running at insane speed
static unsigned long last_time = 0;
unsigned long time_now = millis();
if ((the_time > 0) && (the_time < time_now)) time_now = the_time; // allow caller to override my clock
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if (time_now - last_time > 2) {
last_time = time_now;
if((fabsf(sampleReal) < 2.0f) || (sampleMax < 1.0f)) {
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// MIC signal is "squelched" - deliver silence
tmpAgc = 0;
// we need to "spin down" the intgrated error buffer
if (fabs(control_integrated) < 0.01) control_integrated = 0.0;
else control_integrated *= 0.91;
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} else {
// compute new setpoint
if (tmpAgc <= agcTarget0Up[AGC_preset])
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multAgcTemp = agcTarget0[AGC_preset] / sampleMax; // Make the multiplier so that sampleMax * multiplier = first setpoint
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else
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multAgcTemp = agcTarget1[AGC_preset] / sampleMax; // Make the multiplier so that sampleMax * multiplier = second setpoint
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}
// limit amplification
if (multAgcTemp > 32.0f) multAgcTemp = 32.0f;
if (multAgcTemp < 1.0f/64.0f) multAgcTemp = 1.0f/64.0f;
// compute error terms
control_error = multAgcTemp - lastMultAgc;
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if (((multAgcTemp > 0.085f) && (multAgcTemp < 6.5f)) //integrator anti-windup by clamping
&& (multAgc*sampleMax < agcZoneStop[AGC_preset])) //integrator ceiling (>140% of max)
control_integrated += control_error * 0.002 * 0.25; // 2ms = intgration time; 0.25 for damping
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else
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control_integrated *= 0.9; // spin down that beasty integrator
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// apply PI Control
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tmpAgc = sampleReal * lastMultAgc; // check "zone" of the signal using previous gain
if ((tmpAgc > agcZoneHigh[AGC_preset]) || (tmpAgc < soundSquelch + agcZoneLow[AGC_preset])) { // upper/lower emergy zone
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multAgcTemp = lastMultAgc + agcFollowFast[AGC_preset] * agcControlKp[AGC_preset] * control_error;
multAgcTemp += agcFollowFast[AGC_preset] * agcControlKi[AGC_preset] * control_integrated;
} else { // "normal zone"
multAgcTemp = lastMultAgc + agcFollowSlow[AGC_preset] * agcControlKp[AGC_preset] * control_error;
multAgcTemp += agcFollowSlow[AGC_preset] * agcControlKi[AGC_preset] * control_integrated;
}
// limit amplification again - PI controler sometimes "overshoots"
//multAgcTemp = constrain(multAgcTemp, 0.015625f, 32.0f); // 1/64 < multAgcTemp < 32
if (multAgcTemp > 32.0f) multAgcTemp = 32.0f;
if (multAgcTemp < 1.0f/64.0f) multAgcTemp = 1.0f/64.0f;
}
// NOW finally amplify the signal
tmpAgc = sampleReal * multAgcTemp; // apply gain to signal
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if (fabsf(sampleReal) < 2.0f) tmpAgc = 0.0f; // apply squelch threshold
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//tmpAgc = constrain(tmpAgc, 0, 255);
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if (tmpAgc > 255) tmpAgc = 255.0f; // limit to 8bit
if (tmpAgc < 1) tmpAgc = 0.0f; // just to be sure
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// update global vars ONCE - multAgc, sampleAGC, rawSampleAgc
multAgc = multAgcTemp;
rawSampleAgc = 0.8f * tmpAgc + 0.2f * (float)rawSampleAgc;
// update smoothed AGC sample
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if (fabsf(tmpAgc) < 1.0f)
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sampleAgc = 0.5f * tmpAgc + 0.5f * sampleAgc; // fast path to zero
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else
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sampleAgc += agcSampleSmooth[AGC_preset] * (tmpAgc - sampleAgc); // smooth path
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sampleAgc = fabsf(sampleAgc); // // make sure we have a positive value
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last_soundAgc = soundAgc;
} // agcAvg()
// post-processing and filtering of MIC sample (micDataReal) from FFTcode()
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void getSample()
{
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float sampleAdj; // Gain adjusted sample value
float tmpSample; // An interim sample variable used for calculatioins.
const float weighting = 0.2f; // Exponential filter weighting. Will be adjustable in a future release.
const int AGC_preset = (soundAgc > 0)? (soundAgc-1): 0; // make sure the _compiler_ knows this value will not change while we are inside the function
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#ifdef WLED_DISABLE_SOUND
micIn = inoise8(millis(), millis()); // Simulated analog read
micDataReal = micIn;
#else
#ifdef ARDUINO_ARCH_ESP32
micIn = int(micDataReal); // micDataSm = ((micData * 3) + micData)/4;
#else
// this is the minimal code for reading analog mic input on 8266.
// warning!! Absolutely experimental code. Audio on 8266 is still not working. Expects a million follow-on problems.
static unsigned long lastAnalogTime = 0;
static float lastAnalogValue = 0.0f;
if (millis() - lastAnalogTime > 20) {
micDataReal = analogRead(A0); // read one sample with 10bit resolution. This is a dirty hack, supporting volumereactive effects only.
lastAnalogTime = millis();
lastAnalogValue = micDataReal;
yield();
} else micDataReal = lastAnalogValue;
micIn = int(micDataReal);
#endif
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#endif
micLev += (micDataReal-micLev) / 12288.0f;
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if(micIn < micLev) micLev = ((micLev * 31.0f) + micDataReal) / 32.0f; // align MicLev to lowest input signal
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micIn -= micLev; // Let's center it to 0 now
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// Using an exponential filter to smooth out the signal. We'll add controls for this in a future release.
float micInNoDC = fabsf(micDataReal - micLev);
expAdjF = (weighting * micInNoDC + (1.0f-weighting) * expAdjF);
expAdjF = fabsf(expAdjF); // Now (!) take the absolute value
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expAdjF = (expAdjF <= soundSquelch) ? 0: expAdjF; // simple noise gate
if ((soundSquelch == 0) && (expAdjF < 0.25f)) expAdjF = 0; // do something meaningfull when "squelch = 0"
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tmpSample = expAdjF;
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micIn = abs(micIn); // And get the absolute value of each sample
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sampleAdj = tmpSample * sampleGain / 40.0f * inputLevel/128.0f + tmpSample / 16.0f; // Adjust the gain. with inputLevel adjustment
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sampleReal = tmpSample;
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sampleAdj = fmax(fmin(sampleAdj, 255), 0); // Question: why are we limiting the value to 8 bits ???
sampleRaw = (int16_t)sampleAdj; // ONLY update sample ONCE!!!!
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// keep "peak" sample, but decay value if current sample is below peak
if ((sampleMax < sampleReal) && (sampleReal > 0.5f)) {
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sampleMax = sampleMax + 0.5f * (sampleReal - sampleMax); // new peak - with some filtering
// another simple way to detect samplePeak
if ((binNum < 10) && (millis() - timeOfPeak > 80) && (sampleAvg > 1)) {
samplePeak = true;
timeOfPeak = millis();
udpSamplePeak = true;
}
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} else {
if ((multAgc*sampleMax > agcZoneStop[AGC_preset]) && (soundAgc > 0))
sampleMax += 0.5f * (sampleReal - sampleMax); // over AGC Zone - get back quickly
else
sampleMax *= agcSampleDecay[AGC_preset]; // signal to zero --> 5-8sec
}
if (sampleMax < 0.5f) sampleMax = 0.0f;
sampleAvg = ((sampleAvg * 15.0f) + sampleAdj) / 16.0f; // Smooth it out over the last 16 samples.
sampleAvg = fabsf(sampleAvg); // make sure we have a positive value
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} // getSample()
/* Limits the dynamics of volumeSmth (= sampleAvg or sampleAgc).
* does not affect FFTResult[] or volumeRaw ( = sample or rawSampleAgc)
*/
// effects: Gravimeter, Gravcenter, Gravcentric, Noisefire, Plasmoid, Freqpixels, Freqwave, Gravfreq, (2D Swirl, 2D Waverly)
void limitSampleDynamics(void) {
const float bigChange = 196; // just a representative number - a large, expected sample value
static unsigned long last_time = 0;
static float last_volumeSmth = 0.0f;
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if (limiterOn == false) return;
long delta_time = millis() - last_time;
delta_time = constrain(delta_time , 1, 1000); // below 1ms -> 1ms; above 1sec -> sily lil hick-up
float deltaSample = volumeSmth - last_volumeSmth;
if (attackTime > 0) { // user has defined attack time > 0
float maxAttack = bigChange * float(delta_time) / float(attackTime);
if (deltaSample > maxAttack) deltaSample = maxAttack;
}
if (decayTime > 0) { // user has defined decay time > 0
float maxDecay = - bigChange * float(delta_time) / float(decayTime);
if (deltaSample < maxDecay) deltaSample = maxDecay;
}
volumeSmth = last_volumeSmth + deltaSample;
last_volumeSmth = volumeSmth;
last_time = millis();
}
//////////////////////
// UDP Sound Sync //
//////////////////////
// try to establish UDP sound sync connection
void connectUDPSoundSync(void) {
// This function tries to establish a UDP sync connection if needed
// necessary as we also want to transmit in "AP Mode", but the standard "connected()" callback only reacts on STA connection
static unsigned long last_connection_attempt = 0;
if ((audioSyncPort <= 0) || ((audioSyncEnabled & 0x03) == 0)) return; // Sound Sync not enabled
if (udpSyncConnected) return; // already connected
if (!(apActive || interfacesInited)) return; // neither AP nor other connections availeable
if (millis() - last_connection_attempt < 15000) return; // only try once in 15 seconds
// if we arrive here, we need a UDP connection but don't have one
last_connection_attempt = millis();
connected(); // try to start UDP
}
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void transmitAudioData()
{
if (!udpSyncConnected) return;
//DEBUGSR_PRINTLN("Transmitting UDP Mic Packet");
audioSyncPacket transmitData;
strncpy_P(transmitData.header, PSTR(UDP_SYNC_HEADER), 6);
// transmit samples that were not modified by limitSampleDynamics()
transmitData.sampleRaw = (soundAgc) ? rawSampleAgc: sampleRaw;
transmitData.sampleSmth = (soundAgc) ? sampleAgc : sampleAvg;
transmitData.samplePeak = udpSamplePeak ? 1:0;
udpSamplePeak = false; // Reset udpSamplePeak after we've transmitted it
transmitData.reserved1 = 0;
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for (int i = 0; i < NUM_GEQ_CHANNELS; i++) {
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transmitData.fftResult[i] = (uint8_t)constrain(fftResult[i], 0, 254);
}
transmitData.FFT_Magnitude = my_magnitude;
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transmitData.FFT_MajorPeak = FFT_MajorPeak;
fftUdp.beginMulticastPacket();
fftUdp.write(reinterpret_cast<uint8_t *>(&transmitData), sizeof(transmitData));
fftUdp.endPacket();
return;
} // transmitAudioData()
static bool isValidUdpSyncVersion(const char *header) {
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return strncmp_P(header, PSTR(UDP_SYNC_HEADER), 6) == 0;
}
static bool isValidUdpSyncVersion_v1(const char *header) {
return strncmp_P(header, PSTR(UDP_SYNC_HEADER_v1), 6) == 0;
}
void decodeAudioData(int packetSize, uint8_t *fftBuff) {
audioSyncPacket *receivedPacket = reinterpret_cast<audioSyncPacket*>(fftBuff);
// update samples for effects
volumeSmth = fmaxf(receivedPacket->sampleSmth, 0.0f);
volumeRaw = fmaxf(receivedPacket->sampleRaw, 0.0f);
// update internal samples
sampleRaw = volumeRaw;
sampleAvg = volumeSmth;
rawSampleAgc = volumeRaw;
sampleAgc = volumeSmth;
multAgc = 1.0f;
// Only change samplePeak IF it's currently false.
// If it's true already, then the animation still needs to respond.
autoResetPeak();
if (!samplePeak) {
samplePeak = receivedPacket->samplePeak >0 ? true:false;
if (samplePeak) timeOfPeak = millis();
//userVar1 = samplePeak;
}
//These values are only available on the ESP32
for (int i = 0; i < NUM_GEQ_CHANNELS; i++) fftResult[i] = receivedPacket->fftResult[i];
my_magnitude = fmaxf(receivedPacket->FFT_Magnitude, 0.0f);
FFT_Magnitude = my_magnitude;
FFT_MajorPeak = constrain(receivedPacket->FFT_MajorPeak, 1.0f, 11025.0f); // restrict value to range expected by effects
}
void decodeAudioData_v1(int packetSize, uint8_t *fftBuff) {
audioSyncPacket_v1 *receivedPacket = reinterpret_cast<audioSyncPacket_v1*>(fftBuff);
// update samples for effects
volumeSmth = fmaxf(receivedPacket->sampleAgc, 0.0f);
volumeRaw = volumeSmth; // V1 format does not have "raw" AGC sample
// update internal samples
sampleRaw = fmaxf(receivedPacket->sampleRaw, 0.0f);
sampleAvg = fmaxf(receivedPacket->sampleAvg, 0.0f);;
sampleAgc = volumeSmth;
rawSampleAgc = volumeRaw;
multAgc = 1.0f;
// Only change samplePeak IF it's currently false.
// If it's true already, then the animation still needs to respond.
autoResetPeak();
if (!samplePeak) {
samplePeak = receivedPacket->samplePeak >0 ? true:false;
if (samplePeak) timeOfPeak = millis();
//userVar1 = samplePeak;
}
//These values are only available on the ESP32
for (int i = 0; i < NUM_GEQ_CHANNELS; i++) fftResult[i] = receivedPacket->fftResult[i];
my_magnitude = fmaxf(receivedPacket->FFT_Magnitude, 0.0);
FFT_Magnitude = my_magnitude;
FFT_MajorPeak = constrain(receivedPacket->FFT_MajorPeak, 1.0, 11025.0); // restrict value to range expected by effects
}
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bool receiveAudioData() // check & process new data. return TRUE in case that new audio data was received.
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{
if (!udpSyncConnected) return false;
bool haveFreshData = false;
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size_t packetSize = fftUdp.parsePacket();
if (packetSize > 5) {
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//DEBUGSR_PRINTLN("Received UDP Sync Packet");
uint8_t fftBuff[packetSize];
fftUdp.read(fftBuff, packetSize);
// VERIFY THAT THIS IS A COMPATIBLE PACKET
if (packetSize == sizeof(audioSyncPacket) && (isValidUdpSyncVersion((const char *)fftBuff))) {
decodeAudioData(packetSize, fftBuff);
//DEBUGSR_PRINTLN("Finished parsing UDP Sync Packet v2");
haveFreshData = true;
receivedFormat = 2;
} else {
if (packetSize == sizeof(audioSyncPacket_v1) && (isValidUdpSyncVersion_v1((const char *)fftBuff))) {
decodeAudioData_v1(packetSize, fftBuff);
//DEBUGSR_PRINTLN("Finished parsing UDP Sync Packet v1");
haveFreshData = true;
receivedFormat = 1;
} else receivedFormat = 0; // unknown format
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}
}
return haveFreshData;
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}
//////////////////////
// usermod functions//
//////////////////////
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public:
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//Functions called by WLED or other usermods
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/*
* setup() is called once at boot. WiFi is not yet connected at this point.
* You can use it to initialize variables, sensors or similar.
* It is called *AFTER* readFromConfig()
*/
void setup()
{
disableSoundProcessing = true; // just to be sure
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if (!initDone) {
// usermod exchangeable data
// we will assign all usermod exportable data here as pointers to original variables or arrays and allocate memory for pointers
um_data = new um_data_t;
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um_data->u_size = 8;
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um_data->u_type = new um_types_t[um_data->u_size];
um_data->u_data = new void*[um_data->u_size];
um_data->u_data[0] = &volumeSmth; //*used (New)
um_data->u_type[0] = UMT_FLOAT;
um_data->u_data[1] = &volumeRaw; // used (New)
um_data->u_type[1] = UMT_UINT16;
um_data->u_data[2] = fftResult; //*used (Blurz, DJ Light, Noisemove, GEQ_base, 2D Funky Plank, Akemi)
um_data->u_type[2] = UMT_BYTE_ARR;
um_data->u_data[3] = &samplePeak; //*used (Puddlepeak, Ripplepeak, Waterfall)
um_data->u_type[3] = UMT_BYTE;
um_data->u_data[4] = &FFT_MajorPeak; //*used (Ripplepeak, Freqmap, Freqmatrix, Freqpixels, Freqwave, Gravfreq, Rocktaves, Waterfall)
um_data->u_type[4] = UMT_FLOAT;
um_data->u_data[5] = &my_magnitude; // used (New)
um_data->u_type[5] = UMT_FLOAT;
um_data->u_data[6] = &maxVol; // assigned in effect function from UI element!!! (Puddlepeak, Ripplepeak, Waterfall)
um_data->u_type[6] = UMT_BYTE;
um_data->u_data[7] = &binNum; // assigned in effect function from UI element!!! (Puddlepeak, Ripplepeak, Waterfall)
um_data->u_type[7] = UMT_BYTE;
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}
// Reset I2S peripheral for good measure
i2s_driver_uninstall(I2S_NUM_0); // E (696) I2S: i2s_driver_uninstall(2006): I2S port 0 has not installed
#if !defined(CONFIG_IDF_TARGET_ESP32C3)
delay(100);
periph_module_reset(PERIPH_I2S0_MODULE); // not possible on -C3
#endif
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delay(100); // Give that poor microphone some time to setup.
useBandPassFilter = false;
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switch (dmType) {
#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32S3)
// stub cases for not-yet-supported I2S modes on other ESP32 chips
case 0: //ADC analog
#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3)
case 5: //PDM Microphone
#endif
#endif
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case 1:
DEBUGSR_PRINT(F("AR: Generic I2S Microphone - ")); DEBUGSR_PRINTLN(F(I2S_MIC_CHANNEL_TEXT));
audioSource = new I2SSource(SAMPLE_RATE, BLOCK_SIZE);
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delay(100);
if (audioSource) audioSource->initialize(i2swsPin, i2ssdPin, i2sckPin);
break;
case 2:
DEBUGSR_PRINTLN(F("AR: ES7243 Microphone (right channel only)."));
audioSource = new ES7243(SAMPLE_RATE, BLOCK_SIZE);
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delay(100);
if (audioSource) audioSource->initialize(sdaPin, sclPin, i2swsPin, i2ssdPin, i2sckPin, mclkPin);
break;
case 3:
DEBUGSR_PRINT(F("AR: SPH0645 Microphone - ")); DEBUGSR_PRINTLN(F(I2S_MIC_CHANNEL_TEXT));
audioSource = new SPH0654(SAMPLE_RATE, BLOCK_SIZE);
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delay(100);
audioSource->initialize(i2swsPin, i2ssdPin, i2sckPin);
break;
case 4:
DEBUGSR_PRINT(F("AR: Generic I2S Microphone with Master Clock - ")); DEBUGSR_PRINTLN(F(I2S_MIC_CHANNEL_TEXT));
audioSource = new I2SSource(SAMPLE_RATE, BLOCK_SIZE, 1.0f/24.0f);
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delay(100);
if (audioSource) audioSource->initialize(i2swsPin, i2ssdPin, i2sckPin, mclkPin);
break;
#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3)
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case 5:
DEBUGSR_PRINT(F("AR: I2S PDM Microphone - ")); DEBUGSR_PRINTLN(F(I2S_PDM_MIC_CHANNEL_TEXT));
audioSource = new I2SSource(SAMPLE_RATE, BLOCK_SIZE, 1.0f/4.0f);
useBandPassFilter = true; // this reduces the noise floor on SPM1423 from 5% Vpp (~380) down to 0.05% Vpp (~5)
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delay(100);
if (audioSource) audioSource->initialize(i2swsPin, i2ssdPin);
break;
#endif
#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32S3)
// ADC over I2S is only possible on "classic" ESP32
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case 0:
default:
DEBUGSR_PRINTLN(F("AR: Analog Microphone (left channel only)."));
audioSource = new I2SAdcSource(SAMPLE_RATE, BLOCK_SIZE);
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delay(100);
if (audioSource) audioSource->initialize(audioPin);
break;
#endif
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}
delay(250); // give microphone enough time to initialise
if (!audioSource) enabled = false; // audio failed to initialise
if (enabled) onUpdateBegin(false); // create FFT task
if (FFT_Task == nullptr) enabled = false; // FFT task creation failed
if (enabled) disableSoundProcessing = false; // all good - enable audio processing
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if((!audioSource) || (!audioSource->isInitialized())) { // audio source failed to initialize. Still stay "enabled", as there might be input arriving via UDP Sound Sync
#ifdef WLED_DEBUG
DEBUG_PRINTLN(F("AR: Failed to initialize sound input driver. Please check input PIN settings."));
#else
DEBUGSR_PRINTLN(F("AR: Failed to initialize sound input driver. Please check input PIN settings."));
#endif
disableSoundProcessing = true;
}
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if (enabled) connectUDPSoundSync();
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initDone = true;
}
/*
* connected() is called every time the WiFi is (re)connected
* Use it to initialize network interfaces
*/
void connected()
{
if (udpSyncConnected) { // clean-up: if open, close old UDP sync connection
udpSyncConnected = false;
fftUdp.stop();
}
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if (audioSyncPort > 0 && (audioSyncEnabled & 0x03)) {
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#ifndef ESP8266
udpSyncConnected = fftUdp.beginMulticast(IPAddress(239, 0, 0, 1), audioSyncPort);
#else
udpSyncConnected = fftUdp.beginMulticast(WiFi.localIP(), IPAddress(239, 0, 0, 1), audioSyncPort);
#endif
}
}
/*
* loop() is called continuously. Here you can check for events, read sensors, etc.
*
* Tips:
* 1. You can use "if (WLED_CONNECTED)" to check for a successful network connection.
* Additionally, "if (WLED_MQTT_CONNECTED)" is available to check for a connection to an MQTT broker.
*
* 2. Try to avoid using the delay() function. NEVER use delays longer than 10 milliseconds.
* Instead, use a timer check as shown here.
*/
void loop()
{
static unsigned long lastUMRun = millis();
if (!enabled) {
disableSoundProcessing = true; // keep processing suspended (FFT task)
lastUMRun = millis(); // update time keeping
return;
}
// We cannot wait indefinitely before processing audio data
if (strip.isUpdating() && (millis() - lastUMRun < 2)) return; // be nice, but not too nice
// suspend local sound processing when "real time mode" is active (E131, UDP, ADALIGHT, ARTNET)
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if ( (realtimeOverride == REALTIME_OVERRIDE_NONE) // please add other overrides here if needed
&&( (realtimeMode == REALTIME_MODE_GENERIC)
||(realtimeMode == REALTIME_MODE_E131)
||(realtimeMode == REALTIME_MODE_UDP)
||(realtimeMode == REALTIME_MODE_ADALIGHT)
||(realtimeMode == REALTIME_MODE_ARTNET) ) ) // please add other modes here if needed
{
#ifdef WLED_DEBUG
if ((disableSoundProcessing == false) && (audioSyncEnabled == 0)) { // we just switched to "disabled"
DEBUG_PRINTLN("[AR userLoop] realtime mode active - audio processing suspended.");
DEBUG_PRINTF( " RealtimeMode = %d; RealtimeOverride = %d\n", int(realtimeMode), int(realtimeOverride));
}
#endif
disableSoundProcessing = true;
} else {
#ifdef WLED_DEBUG
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if ((disableSoundProcessing == true) && (audioSyncEnabled == 0) && audioSource->isInitialized()) { // we just switched to "enabled"
DEBUG_PRINTLN("[AR userLoop] realtime mode ended - audio processing resumed.");
DEBUG_PRINTF( " RealtimeMode = %d; RealtimeOverride = %d\n", int(realtimeMode), int(realtimeOverride));
}
#endif
if ((disableSoundProcessing == true) && (audioSyncEnabled == 0)) lastUMRun = millis(); // just left "realtime mode" - update timekeeping
disableSoundProcessing = false;
}
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if (audioSyncEnabled & 0x02) disableSoundProcessing = true; // make sure everything is disabled IF in audio Receive mode
if (audioSyncEnabled & 0x01) disableSoundProcessing = false; // keep running audio IF we're in audio Transmit mode
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if (!audioSource->isInitialized()) disableSoundProcessing = true; // no audio source
// Only run the sampling code IF we're not in Receive mode or realtime mode
if (!(audioSyncEnabled & 0x02) && !disableSoundProcessing) {
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if (soundAgc > AGC_NUM_PRESETS) soundAgc = 0; // make sure that AGC preset is valid (to avoid array bounds violation)
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unsigned long t_now = millis(); // remember current time
int userloopDelay = int(t_now - lastUMRun);
if (lastUMRun == 0) userloopDelay=0; // startup - don't have valid data from last run.
#ifdef WLED_DEBUG
// complain when audio userloop has been delayed for long time. Currently we need userloop running between 500 and 1500 times per second.
if ((userloopDelay > 23) && !disableSoundProcessing && (audioSyncEnabled == 0)) {
DEBUG_PRINTF("[AR userLoop] hickup detected -> was inactive for last %d millis!\n", userloopDelay);
}
#endif
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// run filters, and repeat in case of loop delays (hick-up compensation)
if (userloopDelay <2) userloopDelay = 0; // minor glitch, no problem
if (userloopDelay >200) userloopDelay = 200; // limit number of filter re-runs
do {
getSample(); // run microphone sampling filters
agcAvg(t_now - userloopDelay); // Calculated the PI adjusted value as sampleAvg
userloopDelay -= 2; // advance "simulated time" by 2ms
} while (userloopDelay > 0);
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lastUMRun = t_now; // update time keeping
// update samples for effects (raw, smooth)
volumeSmth = (soundAgc) ? sampleAgc : sampleAvg;
volumeRaw = (soundAgc) ? rawSampleAgc: sampleRaw;
// update FFTMagnitude, taking into account AGC amplification
my_magnitude = FFT_Magnitude; // / 16.0f, 8.0f, 4.0f done in effects
if (soundAgc) my_magnitude *= multAgc;
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if (volumeSmth < 1 ) my_magnitude = 0.001f; // noise gate closed - mute
limitSampleDynamics();
} // if (!disableSoundProcessing)
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autoResetPeak(); // auto-reset sample peak after strip minShowDelay
if (!udpSyncConnected) udpSamplePeak = false; // reset UDP samplePeak while UDP is unconnected
connectUDPSoundSync(); // ensure we have a connection - if needed
// UDP Microphone Sync - receive mode
if ((audioSyncEnabled & 0x02) && udpSyncConnected) {
// Only run the audio listener code if we're in Receive mode
static float syncVolumeSmth = 0;
bool have_new_sample = false;
if (millis() - lastTime > delayMs) {
have_new_sample = receiveAudioData();
if (have_new_sample) last_UDPTime = millis();
lastTime = millis();
}
if (have_new_sample) syncVolumeSmth = volumeSmth; // remember received sample
else volumeSmth = syncVolumeSmth; // restore originally received sample for next run of dynamics limiter
limitSampleDynamics(); // run dynamics limiter on received volumeSmth, to hide jumps and hickups
}
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#if defined(MIC_LOGGER) || defined(MIC_SAMPLING_LOG) || defined(FFT_SAMPLING_LOG)
static unsigned long lastMicLoggerTime = 0;
if (millis()-lastMicLoggerTime > 20) {
lastMicLoggerTime = millis();
logAudio();
}
#endif
// Info Page: keep max sample from last 5 seconds
if ((millis() - sampleMaxTimer) > CYCLE_SAMPLEMAX) {
sampleMaxTimer = millis();
maxSample5sec = (0.15 * maxSample5sec) + 0.85 *((soundAgc) ? sampleAgc : sampleAvg); // reset, and start with some smoothing
if (sampleAvg < 1) maxSample5sec = 0; // noise gate
} else {
if ((sampleAvg >= 1)) maxSample5sec = fmaxf(maxSample5sec, (soundAgc) ? rawSampleAgc : sampleRaw); // follow maximum volume
}
//UDP Microphone Sync - transmit mode
if ((audioSyncEnabled & 0x01) && (millis() - lastTime > 20)) {
// Only run the transmit code IF we're in Transmit mode
transmitAudioData();
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lastTime = millis();
}
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}
bool getUMData(um_data_t **data)
{
if (!data || !enabled) return false; // no pointer provided by caller or not enabled -> exit
*data = um_data;
return true;
}
void onUpdateBegin(bool init)
{
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#ifdef WLED_DEBUG
fftTime = sampleTime = 0;
#endif
// gracefully suspend FFT task (if running)
disableSoundProcessing = true;
// reset sound data
micDataReal = 0.0f;
volumeRaw = 0; volumeSmth = 0;
sampleAgc = 0; sampleAvg = 0;
sampleRaw = 0; rawSampleAgc = 0;
my_magnitude = 0; FFT_Magnitude = 0; FFT_MajorPeak = 1;
multAgc = 1;
// reset FFT data
memset(fftCalc, 0, sizeof(fftCalc));
memset(fftAvg, 0, sizeof(fftAvg));
memset(fftResult, 0, sizeof(fftResult));
for(int i=(init?0:1); i<NUM_GEQ_CHANNELS; i+=2) fftResult[i] = 16; // make a tiny pattern
inputLevel = 128; // resset level slider to default
autoResetPeak();
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if (init && FFT_Task) {
vTaskSuspend(FFT_Task); // update is about to begin, disable task to prevent crash
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if (udpSyncConnected) { // close UDP sync connection (if open)
udpSyncConnected = false;
fftUdp.stop();
}
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} else {
// update has failed or create task requested
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if (FFT_Task) {
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vTaskResume(FFT_Task);
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connected(); // resume UDP
} else
// xTaskCreatePinnedToCore(
xTaskCreate( // no need to "pin" this task to core #0
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FFTcode, // Function to implement the task
"FFT", // Name of the task
5000, // Stack size in words
NULL, // Task input parameter
1, // Priority of the task
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&FFT_Task // Task handle
// , 0 // Core where the task should run
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);
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}
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micDataReal = 0.0f; // just to be sure
if (enabled) disableSoundProcessing = false;
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}
/**
* handleButton() can be used to override default button behaviour. Returning true
* will prevent button working in a default way.
*/
bool handleButton(uint8_t b) {
yield();
// crude way of determining if audio input is analog
// better would be for AudioSource to implement getType()
if (enabled
&& dmType == 0 && audioPin>=0
&& (buttonType[b] == BTN_TYPE_ANALOG || buttonType[b] == BTN_TYPE_ANALOG_INVERTED)
) {
return true;
}
return false;
}
////////////////////////////
// Settings and Info Page //
////////////////////////////
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/*
* addToJsonInfo() can be used to add custom entries to the /json/info part of the JSON API.
* Creating an "u" object allows you to add custom key/value pairs to the Info section of the WLED web UI.
* Below it is shown how this could be used for e.g. a light sensor
*/
void addToJsonInfo(JsonObject& root)
{
char myStringBuffer[16]; // buffer for snprintf()
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JsonObject user = root["u"];
if (user.isNull()) user = root.createNestedObject("u");
JsonArray infoArr = user.createNestedArray(FPSTR(_name));
String uiDomString = F("<button class=\"btn btn-xs\" onclick=\"requestJson({");
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uiDomString += FPSTR(_name);
uiDomString += F(":{");
uiDomString += FPSTR(_enabled);
uiDomString += enabled ? F(":false}});\">") : F(":true}});\">");
uiDomString += F("<i class=\"icons");
uiDomString += enabled ? F(" on") : F(" off");
uiDomString += F("\">&#xe08f;</i>");
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uiDomString += F("</button>");
infoArr.add(uiDomString);
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if (enabled) {
// Input Level Slider
if (disableSoundProcessing == false) { // only show slider when audio processing is running
if (soundAgc > 0) {
infoArr = user.createNestedArray(F("GEQ Input Level")); // if AGC is on, this slider only affects fftResult[] frequencies
} else {
infoArr = user.createNestedArray(F("Audio Input Level"));
}
uiDomString = F("<div class=\"slider\"><div class=\"sliderwrap il\"><input class=\"noslide\" onchange=\"requestJson({");
uiDomString += FPSTR(_name);
uiDomString += F(":{");
uiDomString += FPSTR(_inputLvl);
uiDomString += F(":parseInt(this.value)}});\" oninput=\"updateTrail(this);\" max=255 min=0 type=\"range\" value=");
uiDomString += inputLevel;
uiDomString += F(" /><div class=\"sliderdisplay\"></div></div></div>"); //<output class=\"sliderbubble\"></output>
infoArr.add(uiDomString);
}
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// The following can be used for troubleshooting user errors and is so not enclosed in #ifdef WLED_DEBUG
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// current Audio input
infoArr = user.createNestedArray(F("Audio Source"));
if (audioSyncEnabled & 0x02) {
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// UDP sound sync - receive mode
infoArr.add(F("UDP sound sync"));
if (udpSyncConnected) {
if (millis() - last_UDPTime < 2500)
infoArr.add(F(" - receiving"));
else
infoArr.add(F(" - idle"));
} else {
infoArr.add(F(" - no connection"));
}
} else {
// Analog or I2S digital input
if (audioSource && (audioSource->isInitialized())) {
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// audio source sucessfully configured
if (audioSource->getType() == AudioSource::Type_I2SAdc) {
infoArr.add(F("ADC analog"));
} else {
infoArr.add(F("I2S digital"));
}
// input level or "silence"
if (maxSample5sec > 1.0) {
float my_usage = 100.0f * (maxSample5sec / 255.0f);
snprintf_P(myStringBuffer, 15, PSTR(" - peak %3d%%"), int(my_usage));
infoArr.add(myStringBuffer);
} else {
infoArr.add(F(" - quiet"));
}
} else {
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// error during audio source setup
infoArr.add(F("not initialized"));
infoArr.add(F(" - check GPIO config"));
}
}
// Sound processing (FFT and input filters)
infoArr = user.createNestedArray(F("Sound Processing"));
if (audioSource && (disableSoundProcessing == false)) {
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infoArr.add(F("running"));
} else {
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infoArr.add(F("suspended"));
}
// AGC or manual Gain
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if ((soundAgc==0) && (disableSoundProcessing == false) && !(audioSyncEnabled & 0x02)) {
infoArr = user.createNestedArray(F("Manual Gain"));
float myGain = ((float)sampleGain/40.0f * (float)inputLevel/128.0f) + 1.0f/16.0f; // non-AGC gain from presets
infoArr.add(roundf(myGain*100.0f) / 100.0f);
infoArr.add("x");
}
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if (soundAgc && (disableSoundProcessing == false) && !(audioSyncEnabled & 0x02)) {
infoArr = user.createNestedArray(F("AGC Gain"));
infoArr.add(roundf(multAgc*100.0f) / 100.0f);
infoArr.add("x");
}
// UDP Sound Sync status
infoArr = user.createNestedArray(F("UDP Sound Sync"));
if (audioSyncEnabled) {
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if (audioSyncEnabled & 0x01) {
infoArr.add(F("send mode"));
if ((udpSyncConnected) && (millis() - lastTime < 2500)) infoArr.add(F(" v2"));
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} else if (audioSyncEnabled & 0x02) {
infoArr.add(F("receive mode"));
}
} else
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infoArr.add("off");
if (audioSyncEnabled && !udpSyncConnected) infoArr.add(" <i>(unconnected)</i>");
if (audioSyncEnabled && udpSyncConnected && (millis() - last_UDPTime < 2500)) {
if (receivedFormat == 1) infoArr.add(F(" v1"));
if (receivedFormat == 2) infoArr.add(F(" v2"));
}
#if defined(WLED_DEBUG) || defined(SR_DEBUG)
infoArr = user.createNestedArray(F("Sampling time"));
infoArr.add(float(sampleTime)/100.0f);
infoArr.add(" ms");
infoArr = user.createNestedArray(F("FFT time"));
infoArr.add(float(fftTime)/100.0f);
if ((fftTime/100) >= FFT_MIN_CYCLE) // FFT time over budget -> I2S buffer will overflow
infoArr.add("<b style=\"color:red;\">! ms</b>");
else if ((fftTime/80 + sampleTime/80) >= FFT_MIN_CYCLE) // FFT time >75% of budget -> risk of instability
infoArr.add("<b style=\"color:orange;\"> ms!</b>");
else
infoArr.add(" ms");
DEBUGSR_PRINTF("AR Sampling time: %5.2f ms\n", float(sampleTime)/100.0f);
DEBUGSR_PRINTF("AR FFT time : %5.2f ms\n", float(fftTime)/100.0f);
#endif
}
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}
/*
* addToJsonState() can be used to add custom entries to the /json/state part of the JSON API (state object).
* Values in the state object may be modified by connected clients
*/
void addToJsonState(JsonObject& root)
{
if (!initDone) return; // prevent crash on boot applyPreset()
JsonObject usermod = root[FPSTR(_name)];
if (usermod.isNull()) {
usermod = root.createNestedObject(FPSTR(_name));
}
usermod["on"] = enabled;
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}
/*
* readFromJsonState() can be used to receive data clients send to the /json/state part of the JSON API (state object).
* Values in the state object may be modified by connected clients
*/
void readFromJsonState(JsonObject& root)
{
if (!initDone) return; // prevent crash on boot applyPreset()
bool prevEnabled = enabled;
JsonObject usermod = root[FPSTR(_name)];
if (!usermod.isNull()) {
if (usermod[FPSTR(_enabled)].is<bool>()) {
enabled = usermod[FPSTR(_enabled)].as<bool>();
if (prevEnabled != enabled) onUpdateBegin(!enabled);
}
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if (usermod[FPSTR(_inputLvl)].is<int>()) {
inputLevel = min(255,max(0,usermod[FPSTR(_inputLvl)].as<int>()));
}
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}
}
/*
* addToConfig() can be used to add custom persistent settings to the cfg.json file in the "um" (usermod) object.
* It will be called by WLED when settings are actually saved (for example, LED settings are saved)
* If you want to force saving the current state, use serializeConfig() in your loop().
*
* CAUTION: serializeConfig() will initiate a filesystem write operation.
* It might cause the LEDs to stutter and will cause flash wear if called too often.
* Use it sparingly and always in the loop, never in network callbacks!
*
* addToConfig() will make your settings editable through the Usermod Settings page automatically.
*
* Usermod Settings Overview:
* - Numeric values are treated as floats in the browser.
* - If the numeric value entered into the browser contains a decimal point, it will be parsed as a C float
* before being returned to the Usermod. The float data type has only 6-7 decimal digits of precision, and
* doubles are not supported, numbers will be rounded to the nearest float value when being parsed.
* The range accepted by the input field is +/- 1.175494351e-38 to +/- 3.402823466e+38.
* - If the numeric value entered into the browser doesn't contain a decimal point, it will be parsed as a
* C int32_t (range: -2147483648 to 2147483647) before being returned to the usermod.
* Overflows or underflows are truncated to the max/min value for an int32_t, and again truncated to the type
* used in the Usermod when reading the value from ArduinoJson.
* - Pin values can be treated differently from an integer value by using the key name "pin"
* - "pin" can contain a single or array of integer values
* - On the Usermod Settings page there is simple checking for pin conflicts and warnings for special pins
* - Red color indicates a conflict. Yellow color indicates a pin with a warning (e.g. an input-only pin)
* - Tip: use int8_t to store the pin value in the Usermod, so a -1 value (pin not set) can be used
*
* See usermod_v2_auto_save.h for an example that saves Flash space by reusing ArduinoJson key name strings
*
* If you need a dedicated settings page with custom layout for your Usermod, that takes a lot more work.
* You will have to add the setting to the HTML, xml.cpp and set.cpp manually.
* See the WLED Soundreactive fork (code and wiki) for reference. https://github.com/atuline/WLED
*
* I highly recommend checking out the basics of ArduinoJson serialization and deserialization in order to use custom settings!
*/
void addToConfig(JsonObject& root)
{
JsonObject top = root.createNestedObject(FPSTR(_name));
top[FPSTR(_enabled)] = enabled;
#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32S3)
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JsonObject amic = top.createNestedObject(FPSTR(_analogmic));
amic["pin"] = audioPin;
#endif
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JsonObject dmic = top.createNestedObject(FPSTR(_digitalmic));
dmic[F("type")] = dmType;
JsonArray pinArray = dmic.createNestedArray("pin");
pinArray.add(i2ssdPin);
pinArray.add(i2swsPin);
pinArray.add(i2sckPin);
pinArray.add(mclkPin);
pinArray.add(sdaPin);
pinArray.add(sclPin);
JsonObject cfg = top.createNestedObject("config");
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cfg[F("squelch")] = soundSquelch;
cfg[F("gain")] = sampleGain;
cfg[F("AGC")] = soundAgc;
JsonObject dynLim = top.createNestedObject("dynamics");
dynLim[F("limiter")] = limiterOn;
dynLim[F("rise")] = attackTime;
dynLim[F("fall")] = decayTime;
JsonObject freqScale = top.createNestedObject("frequency");
freqScale[F("scale")] = FFTScalingMode;
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JsonObject sync = top.createNestedObject("sync");
sync[F("port")] = audioSyncPort;
sync[F("mode")] = audioSyncEnabled;
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}
/*
* readFromConfig() can be used to read back the custom settings you added with addToConfig().
* This is called by WLED when settings are loaded (currently this only happens immediately after boot, or after saving on the Usermod Settings page)
*
* readFromConfig() is called BEFORE setup(). This means you can use your persistent values in setup() (e.g. pin assignments, buffer sizes),
* but also that if you want to write persistent values to a dynamic buffer, you'd need to allocate it here instead of in setup.
* If you don't know what that is, don't fret. It most likely doesn't affect your use case :)
*
* Return true in case the config values returned from Usermod Settings were complete, or false if you'd like WLED to save your defaults to disk (so any missing values are editable in Usermod Settings)
*
* getJsonValue() returns false if the value is missing, or copies the value into the variable provided and returns true if the value is present
* The configComplete variable is true only if the "exampleUsermod" object and all values are present. If any values are missing, WLED will know to call addToConfig() to save them
*
* This function is guaranteed to be called on boot, but could also be called every time settings are updated
*/
bool readFromConfig(JsonObject& root)
{
JsonObject top = root[FPSTR(_name)];
bool configComplete = !top.isNull();
configComplete &= getJsonValue(top[FPSTR(_enabled)], enabled);
#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32S3)
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configComplete &= getJsonValue(top[FPSTR(_analogmic)]["pin"], audioPin);
#else
audioPin = -1; // MCU does not support analog mic
#endif
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configComplete &= getJsonValue(top[FPSTR(_digitalmic)]["type"], dmType);
#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3) || defined(CONFIG_IDF_TARGET_ESP32S3)
if (dmType == 0) dmType = SR_DMTYPE; // MCU does not support analog
#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3)
if (dmType == 5) dmType = SR_DMTYPE; // MCU does not support PDM
#endif
#endif
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configComplete &= getJsonValue(top[FPSTR(_digitalmic)]["pin"][0], i2ssdPin);
configComplete &= getJsonValue(top[FPSTR(_digitalmic)]["pin"][1], i2swsPin);
configComplete &= getJsonValue(top[FPSTR(_digitalmic)]["pin"][2], i2sckPin);
configComplete &= getJsonValue(top[FPSTR(_digitalmic)]["pin"][3], mclkPin);
configComplete &= getJsonValue(top[FPSTR(_digitalmic)]["pin"][4], sdaPin);
configComplete &= getJsonValue(top[FPSTR(_digitalmic)]["pin"][5], sclPin);
configComplete &= getJsonValue(top["config"][F("squelch")], soundSquelch);
configComplete &= getJsonValue(top["config"][F("gain")], sampleGain);
configComplete &= getJsonValue(top["config"][F("AGC")], soundAgc);
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configComplete &= getJsonValue(top["dynamics"][F("limiter")], limiterOn);
configComplete &= getJsonValue(top["dynamics"][F("rise")], attackTime);
configComplete &= getJsonValue(top["dynamics"][F("fall")], decayTime);
configComplete &= getJsonValue(top["frequency"][F("scale")], FFTScalingMode);
configComplete &= getJsonValue(top["sync"][F("port")], audioSyncPort);
configComplete &= getJsonValue(top["sync"][F("mode")], audioSyncEnabled);
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return configComplete;
}
void appendConfigData()
{
oappend(SET_F("dd=addDropdown('AudioReactive','digitalmic:type');"));
#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32S3)
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oappend(SET_F("addOption(dd,'Generic Analog',0);"));
#endif
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oappend(SET_F("addOption(dd,'Generic I2S',1);"));
oappend(SET_F("addOption(dd,'ES7243',2);"));
oappend(SET_F("addOption(dd,'SPH0654',3);"));
oappend(SET_F("addOption(dd,'Generic I2S with Mclk',4);"));
#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3)
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oappend(SET_F("addOption(dd,'Generic I2S PDM',5);"));
#endif
oappend(SET_F("dd=addDropdown('AudioReactive','config:AGC');"));
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oappend(SET_F("addOption(dd,'Off',0);"));
oappend(SET_F("addOption(dd,'Normal',1);"));
oappend(SET_F("addOption(dd,'Vivid',2);"));
oappend(SET_F("addOption(dd,'Lazy',3);"));
oappend(SET_F("dd=addDropdown('AudioReactive','dynamics:limiter');"));
oappend(SET_F("addOption(dd,'Off',0);"));
oappend(SET_F("addOption(dd,'On',1);"));
oappend(SET_F("addInfo('AudioReactive:dynamics:limiter',0,' On ');")); // 0 is field type, 1 is actual field
oappend(SET_F("addInfo('AudioReactive:dynamics:rise',1,'ms <i>(&#x266A; effects only)</i>');"));
oappend(SET_F("addInfo('AudioReactive:dynamics:fall',1,'ms <i>(&#x266A; effects only)</i>');"));
oappend(SET_F("dd=addDropdown('AudioReactive','frequency:scale');"));
oappend(SET_F("addOption(dd,'None',0);"));
oappend(SET_F("addOption(dd,'Linear (Amplitude)',2);"));
oappend(SET_F("addOption(dd,'Square Root (Energy)',3);"));
oappend(SET_F("addOption(dd,'Logarithmic (Loudness)',1);"));
oappend(SET_F("dd=addDropdown('AudioReactive','sync:mode');"));
oappend(SET_F("addOption(dd,'Off',0);"));
oappend(SET_F("addOption(dd,'Send',1);"));
oappend(SET_F("addOption(dd,'Receive',2);"));
oappend(SET_F("addInfo('AudioReactive:digitalmic:type',1,'<i>requires reboot!</i>');")); // 0 is field type, 1 is actual field
oappend(SET_F("addInfo('AudioReactive:digitalmic:pin[]',0,'I2S Serial Data', '<i><span class=\"h\">sd/data/dout</span></i>');"));
oappend(SET_F("addInfo('AudioReactive:digitalmic:pin[]',1,'I2S L/R Clock','<i><span class=\"h\">ws/clk/lrck</span></i>');"));
oappend(SET_F("addInfo('AudioReactive:digitalmic:pin[]',2,'I2S Serial Clock','<i>sck/bclk</i>');"));
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#if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32S3)
oappend(SET_F("addInfo('AudioReactive:digitalmic:pin[]',3,'I2S Master CLK','<i>only use -1, 0, 1 or 3</i>');"));
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#else
oappend(SET_F("addInfo('AudioReactive:digitalmic:pin[]',3,'', 'I2S Master CLK');"));
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#endif
oappend(SET_F("addInfo('AudioReactive:digitalmic:pin[]',4,'', 'I2C SDA');"));
oappend(SET_F("addInfo('AudioReactive:digitalmic:pin[]',5,'', 'I2C SCL');"));
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}
/*
* handleOverlayDraw() is called just before every show() (LED strip update frame) after effects have set the colors.
* Use this to blank out some LEDs or set them to a different color regardless of the set effect mode.
* Commonly used for custom clocks (Cronixie, 7 segment)
*/
//void handleOverlayDraw()
//{
//strip.setPixelColor(0, RGBW32(0,0,0,0)) // set the first pixel to black
//}
/*
* getId() allows you to optionally give your V2 usermod an unique ID (please define it in const.h!).
* This could be used in the future for the system to determine whether your usermod is installed.
*/
uint16_t getId()
{
return USERMOD_ID_AUDIOREACTIVE;
}
};
// strings to reduce flash memory usage (used more than twice)
const char AudioReactive::_name[] PROGMEM = "AudioReactive";
const char AudioReactive::_enabled[] PROGMEM = "enabled";
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const char AudioReactive::_inputLvl[] PROGMEM = "inputLevel";
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const char AudioReactive::_analogmic[] PROGMEM = "analogmic";
const char AudioReactive::_digitalmic[] PROGMEM = "digitalmic";
const char AudioReactive::UDP_SYNC_HEADER[] PROGMEM = "00002"; // new sync header version, as format no longer compatible with previous structure
const char AudioReactive::UDP_SYNC_HEADER_v1[] PROGMEM = "00001"; // old sync header version - need to add backwards-compatibility feature