74 lines
2.8 KiB
C++
Executable file
74 lines
2.8 KiB
C++
Executable file
/* Audio Library for Teensy 3.X
|
|
* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
|
|
*
|
|
* Development of this audio library was funded by PJRC.COM, LLC by sales of
|
|
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
|
|
* open source software by purchasing Teensy or other PJRC products.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice, development funding notice, and this permission
|
|
* notice shall be included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef analyze_tonedetect_h_
|
|
#define analyze_tonedetect_h_
|
|
|
|
#include "Arduino.h"
|
|
#include "AudioStream.h"
|
|
|
|
class AudioAnalyzeToneDetect : public AudioStream
|
|
{
|
|
public:
|
|
AudioAnalyzeToneDetect(void)
|
|
: AudioStream(1, inputQueueArray), thresh(6554), enabled(false) { }
|
|
void frequency(float freq, uint16_t cycles=10) {
|
|
set_params((int32_t)(cos((double)freq
|
|
* (2.0 * 3.14159265358979323846 / AUDIO_SAMPLE_RATE_EXACT))
|
|
* (double)2147483647.999), cycles,
|
|
(float)AUDIO_SAMPLE_RATE_EXACT / freq * (float)cycles + 0.5f);
|
|
}
|
|
void set_params(int32_t coef, uint16_t cycles, uint16_t len);
|
|
bool available(void) {
|
|
__disable_irq();
|
|
bool flag = new_output;
|
|
if (flag) new_output = false;
|
|
__enable_irq();
|
|
return flag;
|
|
}
|
|
float read(void);
|
|
void threshold(float level) {
|
|
if (level < 0.01f) thresh = 655;
|
|
else if (level > 0.99f) thresh = 64881;
|
|
else thresh = level * 65536.0f + 0.5f;
|
|
}
|
|
operator bool(); // true if at or above threshold, false if below
|
|
virtual void update(void);
|
|
private:
|
|
int32_t coefficient; // Goertzel algorithm coefficient
|
|
int32_t s1, s2; // Goertzel algorithm state
|
|
int32_t out1, out2; // Goertzel algorithm state output
|
|
uint16_t length; // number of samples to analyze
|
|
uint16_t count; // how many left to analyze
|
|
uint16_t ncycles; // number of waveform cycles to seek
|
|
uint16_t thresh; // threshold, 655 to 64881 (1% to 99%)
|
|
bool enabled;
|
|
volatile bool new_output;
|
|
audio_block_t *inputQueueArray[1];
|
|
};
|
|
|
|
#endif
|