DarkSlein
d6716df807
Created micTask for noise detection Installed GoogleTest Refactored audio module
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
#ifndef _AUDIO_H
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#define _AUDIO_H
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#include <Arduino.h>
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#include "infra/I2S.h"
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// 16bit, monoral, 16000Hz, linear PCM
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class Audio {
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private:
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I2S* i2s;
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static const int _headerSize = 44;
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static const int _i2sBufferSize = 6000; // 22500
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char _i2sBuffer[_i2sBufferSize];
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char _i2sBuffer2[_i2sBufferSize];
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static const int _wavDataSize = 90000; // It must be multiple of _dividedWavDataSize. Recording time is about 1.9 second.
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static const int _dividedWavDataSize = _i2sBufferSize/4;
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char** _wavData; // It's divided. Because large continuous memory area can't be allocated in esp32.
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static const int _prerecordedWavDataSize = _wavDataSize/4;
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char** _prerecordedWavData;
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byte _paddedHeader[_headerSize + 4] = {0}; // The size must be multiple of 3 for Base64 encoding. Additional byte size must be even because wave data is 16bit.
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unsigned long _startMicros = 0;
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void _writeToBuffer(char** wavBuffer, int waveDataSize);
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void _createWavHeader(byte* header, int waveDataSize);
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public:
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Audio(MicType micType);
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~Audio();
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char** record();
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int getSize();
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String print(Stream* stream);
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unsigned long getStartMicros();
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bool isNoiseDetected(int threshold);
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};
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#endif // _AUDIO_H
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