You can now also play MP3s streamed from the internet. (Very rough & wonky code. More or less proof-of-concept right now.)

include/data_sources.h

@@ -3,19 +3,21 @@
 #include <Arduino.h>
 #include <SD.h>
 #include "config.h"
+#include <HTTPClient.h>
 
 class DataSource {
 private:
 public:
 	DataSource() {};
-	~DataSource() {};
+	virtual ~DataSource() {};
 	virtual size_t read(uint8_t* buf, size_t len) = 0;
 	virtual uint8_t read() = 0;
 	virtual size_t position() = 0;
 	virtual void seek(size_t position) = 0;
 	virtual size_t size() = 0;
 	virtual void close() = 0;
-	virtual void skip_id3_tag();
+	virtual void skip_id3_tag() {};
+	virtual bool usable() = 0;
 };
 
 class SDDataSource : public DataSource {
@@ -31,4 +33,23 @@ public:
 	size_t size();
 	void close();
 	void skip_id3_tag();
+	bool usable();
 };
+
+class HTTPSDataSource : public DataSource {
+private:
+	WiFiClient* _stream = NULL;
+	HTTPClient* _http = NULL;
+	uint32_t _length;
+	uint32_t _position;
+public:
+	HTTPSDataSource(String url, uint32_t offset=0);
+	~HTTPSDataSource();
+	size_t read(uint8_t* buf, size_t len);
+	uint8_t read();
+	size_t position();
+	void seek(size_t position);
+	size_t size();
+	void close();
+	bool usable();
+};

include/playlist.h

@@ -11,7 +11,7 @@ private:
 	bool _shuffled = false;
 	std::vector<String> _files;
 public:
-	Playlist(String path);
+	Playlist(String path, bool is_url=false);
 	void start();
 	bool has_track_next();
 	bool has_track_prev();