From afe2df4dfa6d6858f5352f55e8e00ba05faf69fa Mon Sep 17 00:00:00 2001
From: jdlugosz963 <jdlugosz963@gmail.com>
Date: Thu, 22 Dec 2022 18:50:33 +0100
Subject: Add mp3 player

---
 mp3player.cpp | 275 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 275 insertions(+)
 create mode 100644 mp3player.cpp

(limited to 'mp3player.cpp')

diff --git a/mp3player.cpp b/mp3player.cpp
new file mode 100644
index 0000000..b57c5a1
--- /dev/null
+++ b/mp3player.cpp
@@ -0,0 +1,275 @@
+#include "mp3player.h"
+
+MP3List::MP3List(File *dir, ListMode mode) {
+  Serial.println("MP3List::MP3List");
+  this->mode = mode;
+  int size = countListElements(dir);
+
+  list = new String[size];
+
+  Serial.println(size);
+
+  listSize = size;
+  listCurrentPosition=0;
+
+  insertElementsToList(dir);
+  debug();
+}
+
+MP3List::~MP3List() {
+  delete [] list;
+}
+
+void MP3List::debug() {
+  Serial.println("============");
+  for(int i=0; i<listSize; i++) {
+    Serial.print(mode);
+    Serial.print(": ");
+    Serial.print(list[i]);
+    Serial.print("\n\n");
+  }
+  Serial.print("List size");
+  Serial.print(listSize);
+  Serial.print("\n");
+
+  Serial.print("List position");
+  Serial.print(listCurrentPosition);
+  Serial.print("\n");
+
+  Serial.println("============");
+}
+
+bool MP3List::canAdd(File *file) {
+  String fileName = file->name();
+
+  switch(mode) {
+  case ListMode::SECTIONS:
+    Serial.println("SECTIONS");
+    return file->isDirectory();
+    break;
+
+  case ListMode::MUSIC_FILES:
+    Serial.println("MUSIC FILES");
+    return fileName.endsWith(".mp3");
+    break;
+
+  default:
+    Serial.println("DEFAULT");
+    return false;
+    break;
+  }
+}
+
+int MP3List::countListElements(File *dir) {
+  dir->rewindDirectory();
+
+  if (!dir->isDirectory()) {
+    Serial.println("Not a directory");
+    return 0;
+  }
+
+  File file = dir->openNextFile();
+  int elementsCount = 0;
+  while (file) {
+    if(canAdd(&file)) 
+      elementsCount++;
+
+    file.close();
+    file = dir->openNextFile();
+  }
+  return elementsCount;
+}
+
+void MP3List::insertElementsToList(File *dir) {
+  dir->rewindDirectory();
+
+  Serial.println("MP3List::insertElementsToList");
+  if (!dir->isDirectory()) {
+    Serial.println("Not a directory");
+    return;
+  }
+
+  File file = dir->openNextFile();
+  int i=0;
+  while (file) {
+    if(canAdd(&file)) {
+      if (i > listSize) 
+	continue;
+      list[i] = file.name();
+      Serial.print("Dodaje: ");
+      Serial.print(file.name());
+      Serial.print("\n");
+
+      Serial.print("na index: ");
+      Serial.print(i);
+      Serial.print("\n");
+      i++;
+    }
+    file.close();
+    file = dir->openNextFile();
+  }
+}
+
+String MP3List::getCurrent() {
+  Serial.print("list size: ");
+  Serial.print(listSize);
+  Serial.print("\n");
+
+  Serial.print("list current position: ");
+  Serial.print(listCurrentPosition);
+  Serial.print("\n");
+
+  if(listCurrentPosition < listSize)
+    return list[listCurrentPosition];
+  return "";
+}
+
+
+String MP3List::getNext() {
+  if(listCurrentPosition < listSize-1)
+    listCurrentPosition++;
+  else
+    listCurrentPosition = 0;
+
+  return getCurrent();
+}
+
+String MP3List::getPrevious() {
+  if(listCurrentPosition > 0)
+    listCurrentPosition--;
+  else
+    listCurrentPosition = listSize-1;
+
+  return getCurrent();
+}
+
+
+MP3Player::MP3Player() {
+  Serial.println("MP3Player::MP3Player");
+
+  source = new AudioFileSourceSD();
+  mp3 = new AudioGeneratorMP3();
+  out = new AudioOutputI2SNoDAC();
+  updateListSections();
+}
+
+MP3Player::~MP3Player() {
+  delete source;
+  delete mp3;
+  delete out;
+
+  delete listSections;
+  delete listMusicFiles;
+}
+
+void MP3Player::playMP3(String name) {
+  Serial.println("MP3Player::playMP3");
+  Serial.println(name);
+
+  if (mp3->isRunning())
+    mp3->stop();
+
+  source->open(name.c_str());
+  mp3->begin(source, out);
+}
+
+void MP3Player::loop() {
+  if (mp3->isRunning())
+    if (!mp3->loop()) mp3->stop();
+}
+
+void MP3Player::volumeUp() {
+  if(volume + volumeBy < 2.0) {
+    volume += volumeBy;
+    out->SetGain(volume);
+  }
+}
+
+void MP3Player::volumeDown() {
+  if(volume - volumeBy > 0.0) {
+    volume -= volumeBy;
+    out->SetGain(volume);
+  }
+}
+
+String MP3Player::getFilePath(String fileName) {
+  Serial.println("MP3Player::getFilePath");
+  String currentSection = listSections->getCurrent();
+
+  if(currentSection == "" || fileName == "")
+    return "";
+  return rootDir+"/"+currentSection+"/"+fileName;
+}
+
+void MP3Player::nextFile() {
+  Serial.println("MP3Player::next");
+  String current = listMusicFiles->getNext();
+  playMP3(getFilePath(current));
+}
+
+void MP3Player::previousFile() {
+  Serial.println("MP3Player::previous");
+  String current = listMusicFiles->getPrevious();
+  playMP3(getFilePath(current));
+}
+
+void MP3Player::nextSection() {
+  Serial.println("MP3Player::nextS");
+  listSections->getNext();
+  updateListMusicFiles();
+  nextFile();
+}
+
+void MP3Player::previousSection() {
+  Serial.println("MP3Player::previousS");
+  listSections->getPrevious();
+  updateListMusicFiles();
+  nextFile();
+}
+
+
+bool MP3Player::updateListSections() {
+  Serial.println("MP3Player::updateListSections");
+  File root = SD.open(rootDir);
+  if (!root) {
+    Serial.println("Failed to open directory");
+    return false;
+  }
+
+  if (!root.isDirectory()) {
+    Serial.println("Not a directory");
+    return false;
+  }
+
+  delete listSections;
+  listSections = new MP3List(&root, ListMode::SECTIONS);
+  //  root.rewindDirectory();
+  return updateListMusicFiles();
+}
+
+bool MP3Player::updateListMusicFiles() {
+  Serial.println("MP3Player::updateMusicFiles");
+  String currentSection = listSections->getCurrent();
+
+  Serial.println("CURRENT SECTION: ");
+  Serial.println(currentSection);
+  if(currentSection == "")
+    return false;
+
+  File root = SD.open(rootDir + "/" + currentSection);
+
+  if (!root) {
+    Serial.println("Failed to open directory");
+    return false;
+  }
+  if (!root.isDirectory()) {
+    Serial.println("Not a directory");
+    return false;
+  }
+
+  delete listMusicFiles;
+  listMusicFiles = new MP3List(&root, ListMode::MUSIC_FILES);
+  //  root.rewindDirectory();
+  return true;
+}
+
-- 
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