Die Position in einer Playlist beilbt beibehalten, solange die Papabox nicht neu gestartet wird.

include/controller.h

@@ -15,6 +15,7 @@ class Controller {
 	bool is_rfid_present = false;
 	unsigned long last_rfid_check = 0;
 	unsigned long last_button_check = 0;
+	unsigned long last_position_save = 0;
 	uint8_t button_pressed = 0;
 	unsigned long button_pressed_since = 0;
 	bool button_already_processed = false;

include/persisted_playlist.h

@@ -0,0 +1,9 @@
+#pragma once
+
+
+struct PersistedPlaylist {
+	String dir;
+	uint16_t file = 0;
+	uint32_t position = 0;
+	PersistedPlaylist(String s="") : dir(s) {}
+};

include/playlist.h

@@ -2,17 +2,19 @@
 
 #include <vector>
 #include <Arduino.h>
+#include "persisted_playlist.h"
 
 class Playlist {
 	private:
 	std::vector<String> files;
 	uint8_t current_file = 0;
 	uint32_t current_time = 0;
-	void set_current_position(uint8_t file, uint32_t position=0);
 	String rfid_id;
+	PersistedPlaylist* pp;
 
 	public:
-	Playlist(String rfid_id="");
+	Playlist();
+	Playlist(String rfid_id, PersistedPlaylist* p);
 	void add_file(String filename);
 	void sort();
 	String get_rfid_id();
@@ -23,4 +25,6 @@ class Playlist {
 	void set_current_time(uint32_t time);
 	uint32_t get_current_time();
 	void shuffle();
+	void set_current_position(uint8_t file, uint32_t position=0);
+	void save_current_position(uint32_t position=0);
 };

include/playlist_manager.h

@@ -4,6 +4,9 @@
 #include <map>
 #include <Arduino.h>
 #include "playlist.h"
+#include "persisted_playlist.h"
+
+class Playlist;
 
 class PlaylistManager {
 	private:
@@ -13,9 +16,10 @@ class PlaylistManager {
 
 	public:
 	PlaylistManager();
-	std::map<String, String> map;
+	std::map<String, PersistedPlaylist> map;
 	Playlist get_playlist(String rfid_id);
 	bool has_playlist(String rfid_id);
 	Playlist current_playlist;
 	void set_audio_current_time(uint32_t time);
+	String pp_to_String();
 };

src/controller.cpp

@@ -10,6 +10,11 @@ void Controller::handle() {
 		handle_buttons();
 		last_button_check = millis();
 	}
+	if (last_position_save + 10000 < millis() || last_position_save > millis()) {
+		current_playlist.save_current_position(audio.getFilePos());
+		last_position_save = millis();
+		//Serial.println(pm->pp_to_String().c_str());
+	}
 }
 
 void Controller::handle_buttons() {

src/playlist.cpp

@@ -1,7 +1,10 @@
 #include "playlist.h"
 
-Playlist::Playlist(String id) {
+Playlist::Playlist() {}
+
+Playlist::Playlist(String id, PersistedPlaylist* p) {
 	rfid_id = id;
+	pp = p;
 }
 
 String Playlist::get_rfid_id() {
@@ -16,9 +19,22 @@ void Playlist::sort() {
 	std::sort(files.begin(), files.end());
 }
 
-void Playlist::set_current_position(uint8_t file, uint32_t seconds) {
+void Playlist::set_current_position(uint8_t file, uint32_t bytes) {
+	log_d("Setting position: File %d, bytes %d.", file, bytes);
 	current_file = file;
-	current_time = seconds;
+	current_time = bytes;
+	save_current_position();
+}
+
+void Playlist::save_current_position(uint32_t position) {
+	if (position==0) {
+		position = current_time;
+	}
+	log_d("Saving current position: File %d, bytes %d.", current_file, position);
+	if (pp != NULL) {
+		pp->file = current_file;
+		pp->position = position;
+	}
 }
 
 String Playlist::get_current_file_name() {
@@ -54,7 +70,7 @@ void Playlist::restart() {
 }
 
 void Playlist::set_current_time(uint32_t pos) {
-	current_time = pos;
+	set_current_position(current_file, pos);
 }
 
 uint32_t Playlist::get_current_time() {

src/playlist_manager.cpp

@@ -23,7 +23,7 @@ PlaylistManager::PlaylistManager() {
 				String rfid_id = data.substring(0, eq);
 				String folder = data.substring(eq + 1);
 				Serial.printf("  Adding mapping: %s=>%s\n", rfid_id.c_str(), folder.c_str());
-				map[rfid_id] = folder;
+				map[rfid_id] = PersistedPlaylist(folder);
 			}
 		}
 		f.close();
@@ -38,8 +38,10 @@ Playlist PlaylistManager::get_playlist(String rfid_id) {
 			Serial.printf("No known playlist for id %s.\n", rfid_id);
 			return current_playlist;
 		} else {
-			current_playlist = Playlist(rfid_id);
-			String path = map[rfid_id];
+			PersistedPlaylist* ap = &(map[rfid_id]);
+			log_d("PP status is: File %d, bytes %d.", ap->file, ap->position);
+			current_playlist = Playlist(rfid_id, ap);
+			String path = ap->dir;
 			if (path.startsWith("/")) {
 				File dir = SD.open(path);
 				while(File entry = dir.openNextFile()) {
@@ -54,6 +56,7 @@ Playlist PlaylistManager::get_playlist(String rfid_id) {
 					entry.close();
 				}
 				dir.close();
+				current_playlist.set_current_position(ap->file, ap->position);
 			} else if (path.startsWith("http")) {
 				Serial.printf("Adding URL %s to the list of files\n", path.c_str());
 				current_playlist.add_file(path);
@@ -71,4 +74,12 @@ void PlaylistManager::set_audio_current_time(uint32_t time) {
 
 bool PlaylistManager::has_playlist(String rfid_id) {
 	return map.count(rfid_id) == 1;
+}
+
+String PlaylistManager::pp_to_String() {
+	String s = "";
+	for(const auto& kv : map) {
+		s += kv.first + "=" + kv.second.file + "," + kv.second.position + '\n';
+	}
+	return s;
 }