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audio.cpp
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audio.cpp
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#include "audio.h"
#include <ESP8266Audio.h>
#include "AudioGeneratorMIDI.h"
#include "AudioFileSourceFunction.h"
#include "AudioGeneratorWAV.h"
#include "AudioOutputI2SNoDAC.h"
#include <ESP8266SAM.h>
#include "core/mykeyboard.h"
#if defined(HAS_NS4168_SPKR)
bool playAudioFile(FS* fs, String filepath) {
AudioFileSource* source = new AudioFileSourceFS(*fs, filepath.c_str());
if(!source) return false;
AudioOutputI2S* audioout = new AudioOutputI2S(); // https://github.com/earlephilhower/ESP8266Audio/blob/master/src/AudioOutputI2S.cpp#L32
audioout->SetPinout(BCLK, WCLK, DOUT);
AudioGenerator* generator = NULL;
// switch on extension
filepath.toLowerCase(); // case-insensitive match
if (filepath.endsWith(".txt") || filepath.endsWith(".rtttl"))
generator = new AudioGeneratorRTTTL();
if (filepath.endsWith(".wav"))
generator = new AudioGeneratorWAV();
if (filepath.endsWith(".mod"))
generator = new AudioGeneratorMOD();
if (filepath.endsWith(".opus"))
generator = new AudioGeneratorOpus();
if (filepath.endsWith(".mp3")) {
generator = new AudioGeneratorMP3();
source = new AudioFileSourceID3(source);
}
/* 2FIX: compilation issues
if(filepath.endsWith(".mid")) {
// need to load a soundfont
AudioFileSource* sf2 = NULL;
if(setupSdCard()) sf2 = new AudioFileSourceFS(SD, "1mgm.sf2"); // TODO: make configurable
if(!sf2) sf2 = new AudioFileSourceLittleFS(LittleFS, "1mgm.sf2"); // TODO: make configurable
if(!sf2) return false; // a soundfount was not found
AudioGeneratorMIDI* midi = new AudioGeneratorMIDI();
midi->SetSoundfont(sf2);
generator = midi;
} */
if (generator && source && audioout) {
Serial.println("Start audio");
generator->begin(source, audioout);
while (generator->isRunning()) {
if (!generator->loop() || checkAnyKeyPress() ) generator->stop();
}
audioout->stop();
source->close();
Serial.println("Stop audio");
delete generator;
delete source;
delete audioout;
return true;
}
// else
return false; // init error
}
bool playAudioRTTTLString(String song) {
// derived from https://github.com/earlephilhower/ESP8266Audio/blob/master/examples/PlayRTTTLToI2SDAC/PlayRTTTLToI2SDAC.ino
song.trim();
if(song=="") return false;
AudioOutputI2S* audioout = new AudioOutputI2S();
audioout->SetPinout(BCLK, WCLK, DOUT);
AudioGenerator* generator = new AudioGeneratorRTTTL();
AudioFileSource* source = new AudioFileSourcePROGMEM( song.c_str(), song.length() );
if (generator && source && audioout) {
Serial.println("Start audio");
generator->begin(source, audioout);
while (generator->isRunning()) {
if (!generator->loop() || checkAnyKeyPress() ) generator->stop();
}
audioout->stop();
source->close();
Serial.println("Stop audio");
delete generator;
delete source;
delete audioout;
return true;
}
// else
return false; // init error
}
bool tts(String text){
text.trim();
if(text=="") return false;
AudioOutputI2S* audioout = new AudioOutputI2S();
audioout->SetPinout(BCLK, WCLK, DOUT);
// https://github.com/earlephilhower/ESP8266SAM/blob/master/examples/Speak/Speak.ino
audioout->begin();
ESP8266SAM *sam = new ESP8266SAM;
sam->Say(audioout, text.c_str());
delete sam;
return true;
}
bool isAudioFile(String filepath) {
return filepath.endsWith(".opus") || filepath.endsWith(".rtttl") ||
filepath.endsWith(".wav") || filepath.endsWith(".mod") || filepath.endsWith(".mp3") ;
}
void playTone(unsigned int frequency, unsigned long duration, short waveType)
{
// derived from https://github.com/earlephilhower/ESP8266Audio/blob/master/examples/PlayWAVFromFunction/PlayWAVFromFunction.ino
if(frequency==0 || duration==0) return;
float hz = frequency;
AudioGeneratorWAV* wav;
AudioFileSourceFunction* file;
AudioOutputI2S* out = new AudioOutputI2S();
out->SetPinout(BCLK, WCLK, DOUT);
file = new AudioFileSourceFunction( duration/1000.0); // , 1, 44100
//
// you can set (sec, channels, hz, bit/sample) but you should care about
// the trade-off between performance and the audio quality
//
// file = new AudioFileSourceFunction(sec, channels, hz, bit/sample);
// channels : default = 1
// hz : default = 8000 (8000, 11025, 22050, 44100, 48000, etc.)
// bit/sample : default = 16 (8, 16, 32)
// ===== set your sound function =====
if(waveType==0) { // square
file->addAudioGenerators([&](const float time) {
float v = ( sin(hz * time) >= 0 ) ? 1.0f : -1.0f;; // generate square wave
v *= 0.1; // scale
return v;
});
}
else if(waveType==1) { // sine
file->addAudioGenerators([&](const float time) {
float v = sin(TWO_PI * hz * time); // generate sine wave
v *= fmod(time, 1.f); // change linear
v *= 0.1; // scale
return v;
});
}
// TODO: more wave types: triangle, sawtooth
//
// sound function should have one argument(float) and one return(float)
// param : float (current time [sec] of the song)
// return : float (the amplitude of sound which varies from -1.f to +1.f)
wav = new AudioGeneratorWAV();
wav->begin(file, out);
while (wav->isRunning()) {
if (!wav->loop() || checkAnyKeyPress()) wav->stop();
}
delete file;
delete wav;
delete out;
}
#endif
void _tone(unsigned int frequency, unsigned long duration) {
#if defined(BUZZ_PIN)
tone(BUZZ_PIN, frequency, duration);
#elif defined(HAS_NS4168_SPKR)
// alt. implementation using the speaker
playTone(frequency, duration, 0);
#endif
}