M5Stack Fire - Play a web stream on internal DAC.

M5_PlayMP3FromHTTPToDAC.ino

#pragma mark - Depend ESP8266Audio and ESP8266_Spiram libraries
/* 
cd ~/Arduino/libraries
git clone https://github.com/earlephilhower/ESP8266Audio
git clone https://github.com/Gianbacchio/ESP8266_Spiram

Use the "Tools->ESP32 Sketch Data Upload" menu to write the MP3 to SPIFFS
Then upload the sketch normally.  
https://github.com/me-no-dev/arduino-esp32fs-plugin
*/


#include <M5Stack.h>
#include <WiFi.h>
#include "SPIFFS.h"
#include "AudioFileSourceHTTPStream.h"
#include "AudioFileSourceBuffer.h"
#include "AudioGeneratorMP3.h"
#include "AudioOutputI2S.h"


AudioGeneratorMP3 *mp3;
AudioFileSourceHTTPStream *file;
AudioFileSourceBuffer *buff;
AudioOutputI2S *out;

const char * url = "http://icecast.omroep.nl/radio2-bb-mp3";

void setup()
{
  M5.begin();
  M5.Lcd.setTextFont(2);
  WiFi.begin();
  M5.Lcd.printf("Connecting WiFi...\n");
  while ( !WiFi.isConnected() ) delay(100);
  
  //SPIFFS.begin();
  delay(500);
  
  M5.Lcd.printf( "Streaming %s\n", url );
  
  file = new AudioFileSourceHTTPStream(url);
  // Create a buffer using that stream
  buff = new AudioFileSourceBuffer( file, 4096 );
  out = new AudioOutputI2S(0, 1); // Output to builtInDAC
  mp3 = new AudioGeneratorMP3();
  // Pass in the *buffer*, not the *http stream* to enable buffering
  mp3->begin(buff, out);
}

void loop()
{
  if (mp3->isRunning()) {
    if (!mp3->loop()) mp3->stop();
  } else {
    Serial.printf("MP3 done\n");
    delay(10);
  }
}