59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
/**
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* @file basic-a2dp-fft.ino
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* @brief A2DP Sink with output to FFT.
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* For details see the FFT Wiki: https://github.com/pschatzmann/arduino-audio-tools/wiki/FFT
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* @author Phil Schatzmann
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* @copyright GPLv3
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*/
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#include "AudioTools.h"
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#include "AudioTools/AudioLibs/AudioRealFFT.h" // or any other supported inplementation
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#include "BluetoothA2DPSink.h"
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BluetoothA2DPSink a2dp_sink;
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AudioRealFFT fft; // or any other supported inplementation
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// Provide data to FFT
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void writeDataStream(const uint8_t *data, uint32_t length) {
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fft.write(data, length);
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}
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// display fft result
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void fftResult(AudioFFTBase &fft){
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float diff;
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auto result = fft.result();
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if (result.magnitude>100){
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Serial.print(result.frequency);
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Serial.print(" ");
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Serial.print(result.magnitude);
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Serial.print(" => ");
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Serial.print(result.frequencyAsNote(diff));
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Serial.print( " diff: ");
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Serial.println(diff);
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}
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}
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void setup() {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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// Setup FFT
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auto tcfg = fft.defaultConfig();
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tcfg.length = 4096;
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tcfg.channels = 2;
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tcfg.sample_rate = a2dp_sink.sample_rate();;
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tcfg.bits_per_sample = 16;
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tcfg.callback = &fftResult;
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fft.begin(tcfg);
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// register callback
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a2dp_sink.set_stream_reader(writeDataStream, false);
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// Start Bluetooth Audio Receiver
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Serial.print("starting a2dp-fft...");
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a2dp_sink.set_auto_reconnect(false);
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a2dp_sink.start("a2dp-fft");
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}
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void loop() { delay(100); } |