snapshot

libraries/audio-tools/examples/examples-communication/a2dp/basic-file_mp3-a2dp/basic-file_mp3-a2dp.ino

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+//  We use the decoding on the input side to provid pcm data
+
+#include "SPI.h"
+#include "SD.h"
+#include "AudioTools.h"
+#include "AudioTools/Communication/A2DPStream.h"
+#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+//#include "AudioTools/AudioLibs/AudioBoardStream.h" // for SPI pins
+
+File file;
+MP3DecoderHelix mp3;  // or change to MP3DecoderMAD
+EncodedAudioStream decoder(&file, &mp3);
+BluetoothA2DPSource a2dp_source;
+const int chipSelect = SS; //PIN_AUDIO_KIT_SD_CARD_CS;
+
+// callback used by A2DP to provide the sound data - usually len is 128 2 channel int16 frames
+int32_t get_sound_data(uint8_t* data, int32_t size) {
+  int32_t result = decoder.readBytes((uint8_t*)data, size);
+  delay(1); // feed the dog
+  return result;
+}
+
+// Arduino Setup
+void setup(void) {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+  // open file
+  //SPI.begin(PIN_AUDIO_KIT_SD_CARD_CLK, PIN_AUDIO_KIT_SD_CARD_MISO, PIN_AUDIO_KIT_SD_CARD_MOSI, PIN_AUDIO_KIT_SD_CARD_CS);
+  SD.begin(chipSelect);
+  file = SD.open("/test.mp3", FILE_READ);
+  if (!file) {
+    Serial.println("file failed");
+    stop();
+  }
+
+  // make sure we have enough space for the pcm data
+  decoder.transformationReader().resizeResultQueue(1024 * 8);
+  if (!decoder.begin()) {
+    Serial.println("decoder failed");
+    stop();
+  }
+
+  // start the bluetooth
+  Serial.println("starting A2DP...");
+  a2dp_source.set_data_callback(get_sound_data);
+  a2dp_source.start("LEXON MINO L");
+}
+
+// Arduino loop - repeated processing 
+void loop() {
+  delay(1000);
+}