Metadata callback method is not found and Unexpected Data

[eismeraldo]

The library is very interesting and well structured. It does take some time to get used to it to understand how to connect things together. For this reason, I use the examples from the large collection.
I use an ESP32-S3 N16R8 with a PCM5102A and VSCode and PlatformIO.
First I tested the example "player-url_icy-i2s.ino", the 128 Mbits work perfectly, but the 196 Mbits click periodically (about once per second). Example "http://live.streams.klassikradio.de/klassikradio-deutschland/stream/mp3".
I then read the input in a task on core 1 and output it via a queue to the output task on core 0 and then everything worked wonderfully.
In the next step, the metadata is output and there are problems:

1. [W] MetaDataICY.h : 267 - callback not defined
2. [W] MetaDataICY.h : 221 - Unexpected Data: �9� continuously.
   Here is my code:

#include "AudioTools.h"
#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
#include <Secret.hpp>

ICYStream      urlStream(WIFI_SSID, WIFI_PW);
MetaDataOutput outMetaData;
MultiOutput    outMulti;

BufferRTOS<uint8_t>  buffer(2048 * 10); // Perfekte Größe für 10 Frames
QueueStream<uint8_t> queue(buffer);

MP3DecoderHelix    mp3;
I2SStream          i2s;                      // final output of decoded stream
EncodedAudioStream decodeStream(&i2s, &mp3); // Decoding stream

// copy
StreamCopy copierSource(queue, urlStream);
StreamCopy copierSink(outMulti, queue);
// tasks
Task inputTask("read", 3000, 10, 1);
Task outputTask("write", 3000, 10, 0);

// Print Audio Metadata
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);
    AudioLogger::instance().begin(Serial, AudioLogger::Warning);

    // start Queue
    queue.begin();

    // start I2S
    Serial.println("starting I2S...");
    auto config = i2s.defaultConfig(TX_MODE);
    config.pin_bck = 4;
    config.pin_ws = 6;
    config.pin_data = 5;
    i2s.begin(config);

    outMulti.add(outMetaData);
    outMulti.add(decodeStream);

    // mp3 radio
    // urlStream.begin("http://stream.srg-ssr.ch/m/rsp/mp3_128", "audio/mpeg"); // Radio Swiss Pop
    urlStream.begin("http://live.streams.klassikradio.de/klassikradio-deutschland/stream/mp3", "audio/mpeg"); // Klassik Radio

    // setup metadata
    outMetaData.setCallback(printMetaData);
    outMetaData.begin(urlStream.httpRequest());

    decodeStream.begin();

    outputTask.begin([]() { copierSource.copy(); });

    inputTask.begin([]() { copierSink.copy(); });

    LOGI("started...");
}

void loop() {
    // delay(1000);
}

The same problem also occurs with the code "streams-url_mp3-metadata2.ino"
What do I have to change so that the metadata output works? Unfortunately, I haven't found the solution.

[pschatzmann]

Use the metadata functionality provided by ICYStream

urlStream.setMetadataCallback(printMetaData);

Your approach does not work because ICY does not provide ID3 metadata.

[eismeraldo]

Thank you for your help, your tip works perfectly. But the warning still appears.
Registration:

    urlStream.setMetadataCallback(printMetaData);
    urlStream.begin("http://stream.srg-ssr.ch/m/rsp/mp3_128", "audio/mpeg"); // Radio Swiss Pop

Serial Monitor

==> Description: SwissPOP_MP3@128Kbps
==> Name: /SwissPOP_Room1
[W] MetaDataICY.h : 267 - callback not defined
==> Title: Michael Gabler - You 

I based my example on streams-url_mp3-metadata2.ino. It might be helpful for others if the example was corrected:
Change URLStream url(…) to ICYStream url(…)
and change the callback registration from
out1.setCallback(printMetaData); to url.setMetadataCallback(printMetaData);