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

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+/**
+ * @file basic-player-a2dp.ino
+ * @author Phil Schatzmann
+ * @brief Sketch which uses the A2DP callback to provide data from the AudioPlayer via a Queue
+ * The queue is filled by the Arduino loop.
+ * @version 0.1
+ * @date 2022-12-04
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+
+ #include "AudioTools.h"
+ #include "AudioTools/Communication/A2DPStream.h"
+ #include "AudioTools/Disk/AudioSourceSDFAT.h"
+ #include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+ //#include "AudioTools/AudioLibs/AudioBoardStream.h"  // for SD Pins
+ 
+ const int cs = 33; //PIN_AUDIO_KIT_SD_CARD_CS;
+ const int buffer_size = 15*1024;
+ const char *startFilePath = "/";
+ const char *ext = "mp3";
+ AudioSourceSDFAT source(startFilePath, ext, cs);
+ MP3DecoderHelix decoder;
+ //Setup of synchronized buffer
+ BufferRTOS<uint8_t> buffer(0);
+ QueueStream<uint8_t> out(buffer);  // convert Buffer to Stream
+ AudioPlayer player(source, out, decoder);
+ BluetoothA2DPSource a2dp;
+ 
+ // Provide data to A2DP
+ int32_t get_data(uint8_t *data, int32_t bytes) {
+   size_t result_bytes = buffer.readArray(data, bytes);
+   //LOGI("get_data_channels %d -> %d of (%d)", bytes, result_bytes , buffer.available());
+   return result_bytes;
+ }
+ 
+ void setup() {
+   Serial.begin(115200);
+   AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+ 
+   // allocate in PSRAM only possible in setup or loop
+   buffer.resize(buffer_size);
+ 
+   // sd_active is setting up SPI with the right SD pins by calling
+   // 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);
+ 
+   // start QueueStream when 95% full
+   out.begin(95);
+ 
+   // setup player
+   player.setDelayIfOutputFull(0);
+   player.setVolume(0.1);
+   player.begin();
+ 
+   // start a2dp source
+   Serial.println("starting A2DP...");
+   a2dp.set_data_callback(get_data);
+   a2dp.start("LEXON MINO L");
+   Serial.println("Started!");
+ }
+ 
+ void loop() {
+   // decode data to buffer
+   player.copy();
+ }