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libraries/audio-tools/examples/examples-communication/http-client/streams-url_mp3-metadata2/streams-url_mp3-metadata2.ino

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+/**
+ * @file streams-url_mp3-metadata2.ino
+ * @author Phil Schatzmann
+ * @brief read MP3 stream from url and output metadata and audio! 
+ * The used mp3 file contains ID3 Metadata!
+ * @date 2021-11-07
+ * 
+ * @copyright Copyright (c) 2021
+ */
+
+// install https://github.com/pschatzmann/arduino-libhelix.git
+
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+#include "AudioTools/Communication/AudioHttp.h"
+
+//                            -> EncodedAudioStream -> I2SStream
+// URLStream -> MultiOutput -|
+//                            -> MetaDataOutput
+
+URLStream url("ssid","password");
+MetaDataOutput out1; // final output of metadata
+I2SStream i2s; // I2S output
+EncodedAudioStream out2dec(&i2s, new MP3DecoderHelix()); // Decoding stream
+MultiOutput out;
+StreamCopy copier(out, url); // copy url to decoder
+
+// callback for meta data
+void printMetaData(MetaDataType type, const char* str, int len){
+  Serial.print("==> ");
+  Serial.print(toStr(type));
+  Serial.print(": ");
+  Serial.println(str);
+}
+
+void setup(){
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);  
+
+  // setup multi output
+  out.add(out1);
+  out.add(out2dec);
+
+  // setup input
+  url.begin("https://pschatzmann.github.io/Resources/audio/audio.mp3","audio/mp3");
+
+  // setup metadata
+  out1.setCallback(printMetaData);
+  out1.begin(url.httpRequest());
+
+  // setup i2s
+  auto config = i2s.defaultConfig(TX_MODE);
+  i2s.begin(config);
+
+  // setup I2S based on sampling rate provided by decoder
+  out2dec.begin();
+
+}
+
+void loop(){
+  copier.copy();
+}