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libraries/audio-tools/tests-cmake/codec/container-m4a-player/container-m4a-player.ino

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+/**
+ * @file container-m4a-player.ino
+ * @author Phil Schatzmann
+ * @brief Player with M4A files using a single MultiDecoder. However
+ * I recommend to use 2 separate multi decoders one for the player and 
+ * a separate one for the M4A container.
+ * @version 0.1
+ * 
+ * @copyright Copyright (c) 2025
+ * 
+ */
+//#include "SD.h"
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/CodecALAC.h"
+#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+#include "AudioTools/AudioCodecs/CodecAACHelix.h"
+#include "AudioTools/AudioCodecs/ContainerM4A.h"
+#include "AudioTools/AudioCodecs/MultiDecoder.h"
+#include "AudioTools/AudioCodecs/M4AFileSampleSizeBuffer.h"
+#include "AudioTools/Disk/AudioSourceSD.h"
+#include "WiFi.h"
+#include "AudioTools/Communication/RedisBuffer.h"
+
+const char *startFilePath="/home/pschatzmann/Music/m4a";
+const char* ext="m4a";
+AudioSourceSD source(startFilePath, ext);
+CsvOutput<int16_t> out(Serial);
+MultiDecoder multi_decoder;
+ContainerM4A dec_m4a(multi_decoder);
+AACDecoderHelix dec_aac;
+MP3DecoderHelix dec_mp3;
+DecoderALAC dec_alac;
+AudioPlayer player(source, out, multi_decoder);
+// Option 1 - using the played file
+//M4AFileSampleSizeBuffer sizes_buffer(player, dec_m4a);
+// Option 2 - using a file to buffer
+//File buffer_file;
+//RingBufferFile<File,stsz_sample_size_t> file_buffer(0);
+// Option 3 - using redis 
+//WiFiClient client;
+//RedisBuffer<stsz_sample_size_t> redis(client,"m4a-buffer1",0, 1024, 0);
+
+void setup() {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+  // setup multi decoder
+  multi_decoder.addDecoder(dec_m4a, "audio/m4a");
+  multi_decoder.addDecoder(dec_alac,"audio/alac"); 
+  multi_decoder.addDecoder(dec_aac,"audio/aac"); 
+  multi_decoder.addDecoder(dec_mp3,"audio/mp3"); 
+
+  // Option 1
+  //dec_m4a.setSampleSizesBuffer(sizes_buffer);
+
+  // Option 2
+  // set custom buffer to optimize the memory usage
+  // buffer_file = SD.open("/home/pschatzmann/tmp.tmp", O_RDWR | O_CREAT);
+  // file_buffer.begin(buffer_file);
+  // dec_m4a.setSampleSizesBuffer(file_buffer);
+
+  // Option 3
+  // WiFi.begin("ssid","pwd");
+  // while ( WiFi.status() != WL_CONNECTED) {
+  //   Serial.print(".");
+  // }
+  // if (!client.connect(IPAddress(192,168,1,10),6379)){
+  //   Serial.println("redis error");
+  //   stop();
+  // }
+  // dec_m4a.setSampleSizesBuffer(redis);
+ 
+  // setup output
+  auto cfg = out.defaultConfig(TX_MODE);
+  out.begin(cfg);
+
+  //source.setTimeoutAutoNext(5000000);
+  // setup player
+  player.begin();
+}
+
+void loop() {
+  player.copy();
+}