Do RFID scans only at specified intervals. System sounds are now supported, as well as more sound formats (.ogg, .mp4...).

include/README

@@ -1,39 +0,0 @@
-
-This directory is intended for project header files.
-
-A header file is a file containing C declarations and macro definitions
-to be shared between several project source files. You request the use of a
-header file in your project source file (C, C++, etc) located in `src` folder
-by including it, with the C preprocessing directive `#include'.
-
-```src/main.c
-
-#include "header.h"
-
-int main (void)
-{
- ...
-}
-```
-
-Including a header file produces the same results as copying the header file
-into each source file that needs it. Such copying would be time-consuming
-and error-prone. With a header file, the related declarations appear
-in only one place. If they need to be changed, they can be changed in one
-place, and programs that include the header file will automatically use the
-new version when next recompiled. The header file eliminates the labor of
-finding and changing all the copies as well as the risk that a failure to
-find one copy will result in inconsistencies within a program.
-
-In C, the usual convention is to give header files names that end with `.h'.
-It is most portable to use only letters, digits, dashes, and underscores in
-header file names, and at most one dot.
-
-Read more about using header files in official GCC documentation:
-
-* Include Syntax
-* Include Operation
-* Once-Only Headers
-* Computed Includes
-
-https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

include/config.h

@@ -38,3 +38,5 @@
 #define VOLUME_MIN 0x60
 #define VOLUME_MAX 0xC0
 #define VOLUME_STEP 0x08
+
+#define RFID_SCAN_INTERVAL 500

include/controller.h

@@ -12,6 +12,7 @@ private:
 	void _check_rfid();
 	void _check_serial();
 	Player* _player;
+	unsigned long _last_rfid_scan_at = 0;
 public:
 	Controller(Player* p);
 	void loop();

include/player.h

@@ -28,7 +28,8 @@
 
 class Player {
 private:
-	enum state { uninitialized, idle, playing, stopping };
+	enum state { uninitialized, idle, playing, stopping,
+		system_sound_while_playing, system_sound_while_stopped };
 	struct album_state {
 		uint8_t index;
 		uint32_t position;
@@ -42,10 +43,12 @@ private:
 	uint16_t _read_wram(uint16_t address);
 	state _state = state::uninitialized;
 	void _refill();
+	bool _refill_needed();
 	void _flush_and_cancel();
 	void _flush(uint bytes);
 	void _set_last_track(const char* album, uint8_t track, uint32_t position);
 	std::map<String, album_state> _last_tracks;
+	void _play_file(String filename, uint32_t offset);
 	void _finish_playing();
 	void _finish_stopping();
 	void _mute();
@@ -56,6 +59,7 @@ private:
 	SPISettings* _spi_settings = &_spi_settings_slow;
 
 	std::list<String> _files_in_dir(String dir);
+	String _find_album_dir(String album);
 	File _file;
 	uint8_t _buffer[32];
 	String _playing_album;
@@ -74,6 +78,7 @@ public:
 
 	bool play_album(String album);
 	bool play_song(String album, uint8_t song_index, uint32_t offset=0);
+	void play_system_sound(String filename);
 	void stop();
 	bool loop();
 	void set_volume(uint8_t vol, bool save = true);

src/controller.cpp

@@ -13,7 +13,11 @@ Controller::Controller(Player* p) {
 }
 
 void Controller::loop() {
-	_check_rfid();
+	unsigned long now = millis();
+	if ((_last_rfid_scan_at < now - RFID_SCAN_INTERVAL) || (now < _last_rfid_scan_at)) {
+		_check_rfid();
+		_last_rfid_scan_at = now;
+	}
 	_check_serial();
 }
 
@@ -44,6 +48,8 @@ void Controller::_check_serial() {
 			_player->vol_down();
 		} else if (c==' ') {
 			_player->play_album("12345678");
+		} else if (c=='q') {
+			_player->play_system_sound("12345678/Biene Maja.mp3");
 		}
 	}
 }

src/player.cpp

@@ -164,6 +164,22 @@ void Player::track_prev() {
 	play_song(_playing_album, _playing_index - 1);
 }
 
+String Player::_find_album_dir(String id) {
+	String id_with_divider = id + " - ";
+	File root = SD.open("/");
+	File entry;
+	String result = String("");
+	while ((result.length()==0) && (entry = root.openNextFile())) {
+		String name = entry.name();
+		if (entry.isDirectory() && (name.startsWith(id_with_divider) || name.equals(id))) {
+			result = name;
+		}
+		entry.close();
+	}
+	root.close();
+	return result;
+}
+
 std::list<String> Player::_files_in_dir(String path) {
 	Serial.printf("Examining folder %s...\n", path.c_str());
 	if (!path.startsWith("/")) path = String("/") + path;
@@ -174,7 +190,13 @@ std::list<String> Player::_files_in_dir(String path) {
 	File entry;
 	while (entry = dir.openNextFile()) {
 		String filename = entry.name();
-		if (!entry.isDirectory() && !filename.startsWith(".") && filename.endsWith(".mp3")) {
+		if (!entry.isDirectory() &&
+		    !filename.startsWith(".") && 
+		    ( filename.endsWith(".mp3") ||
+		      filename.endsWith(".ogg") ||
+		      filename.endsWith(".wma") ||
+		      filename.endsWith(".mp4") ||
+		      filename.endsWith(".mpa")) {
 			//Serial.printf("Adding file %s\n", filename.c_str());
 			result.push_back(path + filename);
 		} else {
@@ -196,8 +218,15 @@ bool Player::play_album(String album) {
 
 bool Player::play_song(String album, uint8_t index, uint32_t skip_to) {
 	if (_state != idle) return false;
-	Serial.printf("Playing song at index %d, offset %d of album %s\n", index, skip_to, album.c_str());
-	std::list<String> files = _files_in_dir(album);
+	Serial.printf("Trying to play song at index %d, offset %d of album %s\n", index, skip_to, album.c_str());
+	String path = _find_album_dir(album);
+	if (path.length()==0) {
+		Serial.println("Could not find album.");
+		return false;
+	} else {
+		Serial.printf("Found album in dir '%s'.\n", path.c_str());
+	}
+	std::list<String> files = _files_in_dir(path);
 	Serial.printf("Found %d songs in album\n", files.size());
 	if (index >= files.size()) {
 		Serial.println("No matching file found - not playing.");
@@ -206,24 +235,45 @@ bool Player::play_song(String album, uint8_t index, uint32_t skip_to) {
 	//std::list<String>::iterator it = files.begin();
 	//std::advance(it, index);
 	String file = *(std::next(files.begin(), index));
-	Serial.printf("Opening file %s for playback...\n", file.c_str());
+	_state = playing;
+	_playing_album = album;
+	_playing_index = index;
+	_set_last_track(album.c_str(), index, skip_to);
+	_play_file(file, skip_to);
+	return true;
+}
 
+void Player::play_system_sound(String filename) {
+	//String file = String("/system/") + filename;
+	String file = filename;
+	if (!SD.exists(file)) {
+		Serial.printf("File %s does not exist!\n", file.c_str());
+		return;
+	}
+	if (_state == playing) {
+		stop();
+		_state = system_sound_while_playing;
+	} else {
+		_state = system_sound_while_stopped;
+	}
+	_play_file(file, 0);
+}
+
+void Player::_play_file(String file, uint32_t file_offset) {
+	Serial.printf("play_file('%s', %d)\n", file.c_str(), file_offset);
 	_file = SD.open(file);
+	if (!_file) return;
 
 	Serial.println("Resetting SCI_DECODE_TIME...");
 	_write_control_register(SCI_DECODE_TIME, 0);
 	Serial.println("Resetting SS_DO_NOT_JUMP...");
 	_write_control_register(SCI_STATUS, _read_control_register(SCI_STATUS) & ~SS_DO_NOT_JUMP);
 	delay(100);
-	_state = playing;
-	_playing_album = album;
-	_playing_index = index;
+	
 	_refills = 0;
-	_skip_to = skip_to;
+	_skip_to = file_offset;
 	if (_skip_to>0) _mute();
 	Serial.println("Now playing.");
-	_set_last_track(album.c_str(), index, 0);
-	return true;
 }
 
 void Player::_flush(uint bytes) {
@@ -260,9 +310,11 @@ void Player::_flush_and_cancel() {
 }
 
 void Player::stop() {
-	if (_state != playing) return;
+	if (_state != playing /* && _state != system_sound_while_playing && _state != system_sound_while_stopped*/) return;
 	Serial.println("Stopping.");
-	_set_last_track(_playing_album.c_str(), _playing_index, (uint32_t)_file.position());
+	if (_state == playing) {
+		_set_last_track(_playing_album.c_str(), _playing_index, (uint32_t)_file.position());
+	}
 	_state = stopping;
 	_stop_delay = 0;
 	_write_control_register(SCI_MODE, _read_control_register(SCI_MODE) | SM_CANCEL);
@@ -298,6 +350,15 @@ void Player::_refill() {
 		// File is over.
 		Serial.println("EOF reached.");
 		_finish_playing();
+		if (_state == system_sound_while_playing) {
+			_finish_stopping();
+			play_album(_playing_album);
+			return;
+		} else if (_state == system_sound_while_stopped) {
+			_finish_stopping();
+			return;
+		}
+		
 		_finish_stopping();
 		bool result = play_song(_playing_album, _playing_index + 1);
 		if (!result) {
@@ -324,8 +385,15 @@ void Player::_refill() {
 	}
 }
 
+bool Player::_refill_needed() {
+	return _state==playing ||
+		_state==stopping || 
+		_state==system_sound_while_playing || 
+		_state==system_sound_while_stopped;
+}
+
 bool Player::loop() {
-	if (digitalRead(DREQ) && (_state==playing || _state==stopping)) {
+	if (digitalRead(DREQ) && _refill_needed()) {
 		_refill();
 		return true;
 	}