snapshot

libraries/audio-tools/tests-cmake/codec/mp4-parser/mp4-parser.ino

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+/**
+ * @file test-codec-alac.ino
+ * @author Phil Schatzmann
+ * @brief generate sine wave -> encoder -> decoder -> audiokit (i2s)
+ * @version 0.1
+ *
+ * @copyright Copyright (c) 2025
+ *
+ */
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/MP4Parser.h"
+#include "SD.h"
+
+MP4Parser parser;
+File file;
+
+void setup() {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+  if (!SD.begin()) {
+    Serial.println("SD Card initialization failed!");
+    return;
+  }
+
+  file = SD.open("/home/pschatzmann/Music/m4a/aac.m4a");
+  if (!file.isOpen()) {
+    Serial.println("Failed to open file!");
+    return;
+  }
+
+  parser.begin();
+
+  Serial.println("MP4 Boxes:");
+}
+
+void loop() {
+  char buffer[1024];
+  int to_read = min(sizeof(buffer), parser.availableForWrite());
+  size_t bytesRead = file.readBytes(buffer,to_read);
+  assert(parser.write(buffer, bytesRead)== bytesRead);
+  if (bytesRead == 0) {
+    Serial.println("End of file reached.");
+    exit(0);  // Exit the process
+  }
+}