Added CSV files for track metadata

pack_bgm.csv

@@ -0,0 +1,21 @@
+Track	Title	Artist	Album
+1	Explorers	Hiroshi Okubo	Green Album
+2	Valley of the Mind	SamplingMasters MEGA	Green Album
+3	Nitro Mantra	SamplingMasters AYA	Green Album
+4	I Want You	SamplingMasters AYA	Green Album
+5	Road Mauler	Rio Hamamoto	Green Album
+6	Floodlight	sanodg	White Album
+7	Drift Psychosis	Hiroshi Okubo	White Album
+8	Sue?o Del Mar	Asuka Sakai	White Album
+9	Trail of Light	J99	White Album
+10	Ultra Cruise	Tetsukazu Nakanishi	White Album
+11	Highway Fusion	SamplingMasters MEGA	Black Album
+12	Acid Eutron #001	Acid Eutron	Black Album
+13	Radiance	sanodg	Black Album
+14	Photon Field	Koji Nakagawa	Black Album
+15	Galactic Life	"Kohta ""SOLIDSTATE"" Takahashi"	Black Album
+16	Run PAC-MAN Run!	Akitaka Tohyama	Black Album
+17			
+18			
+19			
+20			

src/goblincave/gitea/nes/AudioExtractor.java

@@ -29,19 +29,38 @@ import com.diogonunes.jcolor.Attribute;
  */
 public class AudioExtractor {
 	
-	/**
-	 * ANSI code to go up one line, followed by a carriage return.
-	 * Useful for overwriting user input
-	 */
-	private final static String BACKLINE = "\033[F\r";
-	private final static String PALE_YELLOW = "\u001B[93m";
-	
-	private final static int RIFF = 0x52494646;
 	/**
 	 * Activate alternate behavior for command line terminal.
 	 * Specifically prints things in a narrower width, and overwrites previous lines to add color.
 	 */
-	private final static boolean CMD = false;
+	private final static boolean CMD_MODE = false;
+	
+	/**
+	 * ANSI code to go up one line, followed by a carriage return.
+	 * Useful for overwriting user input.
+	 */
+	private final static String ANSI_BACKLINE = "\033[F\r";
+	/**
+	 * ANSI code to switch to beige colored text.
+	 * Useful for highlighting user input.
+	 */
+	private final static String ANSI_BEIGE = "\u001B[93m";
+	
+	/**
+	 * Hex value for the ASCII sequence "RIFF".
+	 * Indicates the start of a RIFF header in WAV files.
+	 */
+	private final static int ASCII_RIFF = 0x5249_4646;
+	/**
+	 * Hex value for the ASCII sequence "smpl".
+	 * Indicates the start of a sample chunk in WAV files.
+	 */
+	private final static int ASCII_smpl = 0x736D_706C;
+	/**
+	 * Hex value for the ASCII sequence "data".
+	 * Indicates the start of a data chunk in WAV files.
+	 */
+	private final static int ASCII_data = 0x6461_7461;
 	
 	/**
 	 * BIN files must first be extracted from game disk to use this program.
@@ -60,18 +79,24 @@ public class AudioExtractor {
 	 */
 	public static void main(String[] args) throws URISyntaxException, InterruptedException {
 		
-		if(CMD) {
+		// Print Audio Extractor logo
+		if(CMD_MODE) {
+			
 			// NARROW LOGO
-			String adjustment = "█████████   ████████████████████████████████████████████████████                     ████████████████████████";
 			System.out.println(Ansi.colorize(logoFormat("Ridge", true, 8)/*.substring(0, 484) + adjustment*/, Attribute.BRIGHT_RED_TEXT()));
 			Thread.sleep(500);
-			System.out.println(BACKLINE + BACKLINE + Ansi.colorize(adjustment, Attribute.BRIGHT_RED_TEXT()));
+			
+			String adjustment = "█████████   ████████████████████████████████████████████████████                     ████████████████████████";
+			System.out.println(ANSI_BACKLINE + ANSI_BACKLINE + Ansi.colorize(adjustment, Attribute.BRIGHT_RED_TEXT()));
 			System.out.println(Ansi.colorize(logoFormat("Racer 6", true, 9), Attribute.BRIGHT_RED_TEXT()));
 			Thread.sleep(500);
+			
 			System.out.println(Ansi.colorize(logoFormat("Audio", true, 8), Attribute.YELLOW_TEXT()));
 			Thread.sleep(500);
+			
 			System.out.println(Ansi.colorize(logoFormat("Xtractr", true, 8), Attribute.YELLOW_TEXT()));
 			Thread.sleep(500);
+			
 		} else {
 			// WIDE LOGO
 			System.out.println(Ansi.colorize(logoFormat("Ridge Racer 6"), Attribute.BRIGHT_RED_TEXT()));
@@ -80,11 +105,12 @@ public class AudioExtractor {
 			Thread.sleep(500);
 		}
 		
+		// Print meta info
 		System.out.println("Program:\tRidge Racer 6 Audio Extractor " + Ansi.colorize("v1.0", Attribute.BRIGHT_GREEN_TEXT()) + " by " 
 				+ Ansi.colorize("Nes", Attribute.TEXT_COLOR(252, 42, 124)));
 		System.out.println("Repository:\t" + Ansi.colorize("https://gitea.goblincave.synology.me/Nes/RR6AudioExtractor", Attribute.CYAN_TEXT()));
 		
-		// Used for reading user input
+		// Initialize user input reader
 		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
 		
 		// determine which operation to execute
@@ -116,7 +142,7 @@ public class AudioExtractor {
 					break;
 				case "print": // print
 					Attribute color = retrieveColor(reader);
-					String message = retrieveInput(reader, "Please enter your logo message: " + PALE_YELLOW);
+					String message = retrieveInput(reader, "Please enter your logo message: " + ANSI_BEIGE);
 					System.out.println(Ansi.colorize(logoFormat(message), color));
 					break;
 				case "exit": // exit
@@ -204,358 +230,15 @@ public class AudioExtractor {
 		else extract(packDirectory, extractDirectory, compressBGM);
 		
 	}
-
-	private static File retrieveWave(BufferedReader reader) {
-		
-		String prompt = "Please provide a WAV file: " + PALE_YELLOW;
-		
-		File waveFile = null;
-		boolean valid = false;
-		do {
-			
-			// Retrieve an audio file
-			waveFile = retrieveFile(reader, prompt, ".wav");
-			
-			try {
-				// validate that chosen file is a proper Wave file
-				RandomAccessFile file = new RandomAccessFile(waveFile, "r");
-				// first 4 bytes start with RIFF
-				if(file.readInt() == RIFF) {
-					// next 4 bytes contain the size of the file in little-endian representation
-					file.seek(4);
-					byte[] buffer = new byte[4];
-					file.read(buffer); // write size bytes to buffer
-					
-					// calculate expected file size
-					int headerSize = 8 + buffer[3] 
-							+ buffer[2] * (int) Math.pow(16, 2) 
-							+ buffer[1] * (int) Math.pow(16, 4)
-							+ buffer[0] * (int) Math.pow(16, 6);
-					
-					// file is valid if actual file length matches expected size
-					valid = headerSize == file.length();
-					if(!valid)
-						System.out.println("File length mismatch. Expected " + headerSize + " bytes, but found " + file.length() + " bytes.");
-					
-				} else System.out.println("Invalid RIFF header.");
-				file.close();
-			} catch (IOException e) {
-				System.out.println("Invalid file.");
-			}
-			
-		} while(!valid);
-		
-		return waveFile;
-		
-	}
-
-	private static File retrieveFile(BufferedReader reader, String prompt, String extension) {
-		
-		File file = null;
-		
-		String input = null;
-		boolean valid = false;
-		do {
-			System.out.print(prompt);
-			try {
-				input = reader.readLine();
-				file = new File(input);
-				if(file.exists()) {
-					if(file.getName().toLowerCase().endsWith(extension)) {
-						valid = true;
-					} else System.out.println("File does not have " + extension.toUpperCase() + " file extension");
-				} else System.out.println("File does not exist.");
-			} catch (IOException e) {
-				System.out.println(Ansi.colorize("Invalid file."));
-			}
-		} while(!valid);
-		
-		return file;
-		
-	}
-
-	private static Attribute retrieveColor(BufferedReader reader) {
-		
-		String prompt = "\nCommand parameters: " + Ansi.colorize("Print", Attribute.BRIGHT_BLUE_TEXT()) 
-				+ Ansi.colorize(" [color]", Attribute.BRIGHT_YELLOW_TEXT()) + Ansi.colorize(" [message]", Attribute.BRIGHT_RED_TEXT()) 
-				+ "\n" 
-				+ "\n" + Ansi.colorize("Colors", Attribute.BRIGHT_YELLOW_TEXT(), Attribute.BOLD()) + ":"
-				+ "\n- " + Ansi.colorize("Default", Attribute.CLEAR())
-				+ "\n- " + Ansi.colorize("Black", Attribute.BLACK_TEXT()) 
-						+ ", " + Ansi.colorize("Gray", Attribute.BRIGHT_BLACK_TEXT()) 
-						+ ", " + Ansi.colorize("White", Attribute.BRIGHT_WHITE_TEXT())
-				+ "\n- " + Ansi.colorize("Indigo", Attribute.TEXT_COLOR(0x7D, 0x1A, 0xFF)) 
-						+ ", " + Ansi.colorize("Purple", Attribute.BRIGHT_MAGENTA_TEXT()) 
-						+ ", " + Ansi.colorize("Violet", Attribute.TEXT_COLOR(0xEE, 0x82, 0xEE))
-				+ "\n- " + Ansi.colorize("Red", Attribute.RED_TEXT()) 
-						+ ", " + Ansi.colorize("Cinnabar", Attribute.BRIGHT_RED_TEXT()) 
-						+ ", " + Ansi.colorize("Pink", Attribute.TEXT_COLOR(0xFF, 0xC0, 0xCB))
-				+ "\n- " + Ansi.colorize("Orange", Attribute.TEXT_COLOR(0xFF, 0x68, 0x1F)) 
-						+ ", " + Ansi.colorize("Gold", Attribute.YELLOW_TEXT()) 
-						+ ", " + Ansi.colorize("Yellow", Attribute.TEXT_COLOR(0xFF, 0xEA, 0x00))
-				+ "\n- " + Ansi.colorize("Green", Attribute.BRIGHT_GREEN_TEXT()) 
-						+ ", " + Ansi.colorize("Chartreuse", Attribute.TEXT_COLOR(0xD1, 0xEB, 0x27)) 
-						+ ", " + Ansi.colorize("Beige", Attribute.BRIGHT_YELLOW_TEXT())
-				+ "\n- " + Ansi.colorize("Blue", Attribute.BRIGHT_BLUE_TEXT()) 
-						+ ", " + Ansi.colorize("Teal", Attribute.TEXT_COLOR(0x00, 0x93, 0xCF)) 
-						+ ", " + Ansi.colorize("Cyan", Attribute.BRIGHT_CYAN_TEXT())
-				+ "\n" 
-				+ "\n" + Ansi.colorize("Please select a color:") + PALE_YELLOW + " ";
-		String[] values = {"Default", "Black", "Gray", "White",	"Indigo", "Purple", "Violet", "Red", "Cinnabar", "Pink", "Orange", "Gold", 
-				"Yellow", "Green", "Chartreuse", "Beige","Blue", "Teal", "Cyan"};
-		
-		String input = retrieveInput(reader, prompt, values);
-		
-		Attribute color = null;
-		switch(input.toLowerCase()) {
-			case "default":		color = Attribute.CLEAR(); 						break;
-			case "black": 		color = Attribute.BLACK_TEXT(); 				break;
-			case "gray": 		color = Attribute.BRIGHT_BLACK_TEXT(); 			break;
-			case "white": 		color = Attribute.BRIGHT_WHITE_TEXT(); 			break;
-			case "indigo": 		color = Attribute.TEXT_COLOR(0x7D, 0x1A, 0xFF); break;
-			case "purple": 		color = Attribute.BRIGHT_MAGENTA_TEXT(); 		break;
-			case "violet": 		color = Attribute.TEXT_COLOR(0xEE, 0x82, 0xEE); break;
-			case "red": 		color = Attribute.RED_TEXT(); 					break;
-			case "cinnabar": 	color = Attribute.BRIGHT_RED_TEXT(); 			break;
-			case "pink": 		color = Attribute.TEXT_COLOR(0xFF, 0xC0, 0xCB); break;
-			case "orange":		color = Attribute.TEXT_COLOR(0xFF, 0x68, 0x1F);	break;
-			case "gold":		color = Attribute.YELLOW_TEXT();				break;
-			case "yellow":		color = Attribute.TEXT_COLOR(0xFF, 0xEA, 0x00);	break;
-			case "green": 		color = Attribute.BRIGHT_GREEN_TEXT(); 			break;
-			case "chartreuse": 	color = Attribute.TEXT_COLOR(0xD1, 0xEB, 0x27); break;
-			case "beige":		color = Attribute.BRIGHT_YELLOW_TEXT(); 		break;
-			case "blue":		color = Attribute.BRIGHT_BLUE_TEXT(); 			break;
-			case "teal":		color = Attribute.TEXT_COLOR(0x00, 0x93, 0xCF); break;
-			case "cyan":		color = Attribute.BRIGHT_CYAN_TEXT(); 			break;
-		}
-		
-		if(CMD)
-			System.out.println(BACKLINE + Ansi.colorize("Please select a color: ") + Ansi.colorize(input, color) + "\n");
-		else System.out.println(Ansi.colorize(""));
-		
-		return color;
-		
-	}
-
-	private static String retrieveOperation(BufferedReader reader, String input) {
-		
-		String operation = null;
-		String[] values = {"extract", "package", "patch", "print", "exit"};
-		
-		if(input != null)
-			for(int i = 0; i < values.length; i++)
-				if(values[i].equalsIgnoreCase(input))
-					operation = values[i];
-		
-		if(operation == null) {
-		
-			String prompt = "\n" + Ansi.colorize("Operations", Attribute.BRIGHT_YELLOW_TEXT(), Attribute.BOLD()) + ":\n"
-					+ "- " + Ansi.colorize("Extract", Attribute.BRIGHT_RED_TEXT()) + " audio tracks from package\n"
-					+ "- " + Ansi.colorize("Package", Attribute.YELLOW_TEXT()) + " audio tracks into package\n"
-					+ "- " + Ansi.colorize("Patch", Attribute.BRIGHT_GREEN_TEXT()) + " audio track to loop indefinitely\n"
-					+ "- " + Ansi.colorize("Print", Attribute.BRIGHT_BLUE_TEXT()) + " Ridge Racer 6 style ASCII logo\n"
-					+ "- " + Ansi.colorize("Exit", Attribute.BRIGHT_MAGENTA_TEXT()) + " program\n"
-					+ "\nPlease select an operation: " + PALE_YELLOW;
-			
-			operation = retrieveInput(reader, prompt, values);
-			
-			if(CMD) {
-				
-				Attribute color = null;
-				switch(operation.toLowerCase()) {
-					case "extract":
-						color = Attribute.BRIGHT_RED_TEXT();
-						break;
-					case "package":
-						color = Attribute.YELLOW_TEXT();
-						break;
-					case "patch":
-						color = Attribute.BRIGHT_GREEN_TEXT();
-						break;
-					case "print":
-						color = Attribute.BRIGHT_BLUE_TEXT();
-						break;
-					case "exit":
-						color = Attribute.BRIGHT_MAGENTA_TEXT();
-						break;
-				}
-				System.out.println(BACKLINE + Ansi.colorize("Please select an operation: ") + Ansi.colorize(operation, color));
-				
-			} else System.out.print(Ansi.colorize(""));
-		
-		}
-		
-		return operation.toLowerCase();
-		
-	}
-
-	/**
-	 * Prompts the user for input without strict validation.
-	 * @param reader
-	 * @param prompt
-	 * @return input
-	 */
-	private static String retrieveInput(BufferedReader reader, String prompt) {
-		
-		String input = null;
-		
-		boolean valid = false;
-		do {
-			System.out.print(prompt);
-			try {
-				input = reader.readLine();
-				valid = true;
-			} catch (IOException e) {
-				System.out.println(Ansi.colorize("Invalid input."));
-			}
-		} while(!valid);
-		
-		return input;
-		
-	}
 	
 	/**
-	 * Prompts the user for input and validates that the input matches one of the provided values.
+	 * Extracts audio files to the extract directory from package files located at the package directory.
+	 * Also supports FLAC conversion for BGM files.
 	 * 
-	 * @param reader
+	 * @param packDirectory
-	 * @param prompt
+	 * @param extractDirectory
-	 * @param values
+	 * @param compressBGM
-	 * @return input
 	 */
-	private static String retrieveInput(BufferedReader reader, String prompt, String[] values) {
-		
-		String input = null;
-		
-		boolean valid = false;
-		do {
-			System.out.print(prompt);
-			try {
-				input = reader.readLine();
-				for(int i = 0; i < values.length; i++)
-					if(input.equalsIgnoreCase(values[i])) {
-						valid = true;
-						break;
-					}
-				if(!valid)
-					System.out.println(Ansi.colorize("Invalid selection."));
-			} catch (IOException e) {
-				System.out.println(Ansi.colorize("Invalid selection."));
-			}
-		} while(!valid);
-		
-		return input;
-		
-	}
-	
-	/**
-	 * Patches the provided WAV file by seeking out its data and smpl chunks, 
-	 * deletes any existing smpl chunk, 
-	 * then inserts a new smpl chunk with loop points set at the start and end of the data chunk.
-	 * @param waveFile
-	 */
-	private static void patch(File waveFile) {
-		
-		try {
-			RandomAccessFile file = new RandomAccessFile(waveFile, "r");
-			
-			// Also Find data location
-			int dataAddress = -1;
-			// Check if sample chunk already exists
-			int smplAddress = -1;
-			for(int i = 0; i < file.length(); i += 4) {
-				file.seek(i);
-				int scan = file.readInt(); 
-				// match "smpl" chunk header
-				if(scan == 0x736D706C)
-					smplAddress = i;
-				// match "data" chunk header
-				if(scan == 0x64617461)
-					dataAddress = i;
-				if(smplAddress > -1 && dataAddress > -1)
-					break;
-			}
-			
-			// Determine size of data chunk
-			if(dataAddress > -1) {
-				
-				file.seek(dataAddress + 4);
-				byte[] buffer = new byte[4];
-				file.read(buffer);
-				
-				int dataSize = 8 + buffer[3] 
-						+ buffer[2] * (int) Math.pow(16, 2) 
-						+ buffer[1] * (int) Math.pow(16, 4)
-						+ buffer[0] * (int) Math.pow(16, 6);
-				
-			}
-			
-			// Determine size of smpl chunk
-			if(smplAddress > -1) {
-				
-				file.seek(smplAddress + 4);
-				byte[] buffer = new byte[4];
-				file.read(buffer); // write size bytes to buffer
-				
-				// calculate expected chunk size
-				int smplSize = 8 + buffer[3] 
-						+ buffer[2] * (int) Math.pow(16, 2) 
-						+ buffer[1] * (int) Math.pow(16, 4)
-						+ buffer[0] * (int) Math.pow(16, 6);
-				
-			}
-			
-			
-			
-			// Create new sample chunk
-				// Insert 68-byte sample chunk with loop before data chunk
-			
-			
-			
-			// Set loop points to start and end of data chunk
-			// Update the new file size in RIFF header
-		} catch(IOException e) {
-			System.out.println("Failed to patch file.");
-		}
-		
-	}
-
-	private static void pack(File packDirectory, File extractDirectory) {
-		
-		// Identify extracted folders
-		File[] packages = new File(extractDirectory.toString()).listFiles(new FilenameFilter() {
-			public boolean accept(File dir, String name) {
-				return name.toLowerCase().startsWith("pack_") && !name.toLowerCase().endsWith(".bin");
-			}
-		}); 
-        
-		for(int i = 0; i < packages.length; i++)
-			System.out.println(packages[i].getName());
-		
-		for(File packDir : packages) {
-			
-			// 1. Compile list of WAV files in extracted directories
-			File[] audioTracks = new File(packDir.toString()).listFiles(new FilenameFilter() {
-				public boolean accept(File dir, String name) {
-					return name.toLowerCase().endsWith(".wav");
-				}
-			});
-			
-			// 2. Check if pack files already exist in package directory
-			File pack = new File(packDir.getPath() + ".bin");
-			if(pack.exists());
-			
-			// 3. If pack file already exists, insert WAV files into existing file.
-			// 4. If pack file doesn't exist, create new file then insert WAV files.
-		}
-		// Hypothesis 1: Does Ridge Racer 6 use a predetermined address list for reading tracks from package?
-		// Test 1: Try changing the address of a track and see if the game can handle it successfully.
-		
-		// Hypothesis 2: Does Ridge Racer 6 loop tracks in their entirety, or do they use loop points defined in the file header?
-		// Test 1: Try editing loop information and see if it affects in-game playback.
-		// Test 2: Try replacing a track with a WAV file without loop data and see if it loops in in-game playback.
-		
-	}
-
 	public static void extract(File packDirectory, File extractDirectory, boolean compressBGM) {
 		
 		// TODO Delete
@@ -686,6 +369,463 @@ public class AudioExtractor {
 		}
 		
 	}
+	
+
+	/**
+	 * Packs WAV files located at the extract directory into BIN files at the package directory.
+	 * 
+	 * @param packDirectory
+	 * @param extractDirectory
+	 */
+	private static void pack(File packDirectory, File extractDirectory) {
+		
+		// Identify extracted folders
+		File[] packages = new File(extractDirectory.toString()).listFiles(new FilenameFilter() {
+			public boolean accept(File dir, String name) {
+				return name.toLowerCase().startsWith("pack_") && !name.toLowerCase().endsWith(".bin");
+			}
+		}); 
+        
+		for(int i = 0; i < packages.length; i++)
+			System.out.println(packages[i].getName());
+		
+		for(File packDir : packages) {
+			
+			// 1. Compile list of WAV files in extracted directories
+			File[] audioTracks = new File(packDir.toString()).listFiles(new FilenameFilter() {
+				public boolean accept(File dir, String name) {
+					return name.toLowerCase().endsWith(".wav");
+				}
+			});
+			
+			// 2. Check if pack files already exist in package directory
+			File pack = new File(packDir.getPath() + ".bin");
+			if(pack.exists());
+			
+			// 3. If pack file already exists, insert WAV files into existing file.
+			// 4. If pack file doesn't exist, create new file then insert WAV files.
+			
+		}
+		
+		// Hypothesis 1: Does Ridge Racer 6 use a predetermined address list for reading tracks from package?
+		// Test 1: Try changing the address of a track and see if the game can handle it successfully.
+		
+		// Hypothesis 2: Does Ridge Racer 6 loop tracks in their entirety, or do they use loop points defined in the file header?
+		// Test 1: Try editing loop information and see if it affects in-game playback.
+		// Test 2: Try replacing a track with a WAV file without loop data and see if it loops in in-game playback.
+		
+	}
+	
+	/**
+	 * Patches a WAV file by seeking out its data and smpl chunks, 
+	 * replacing any existing smpl chunk with a new smpl chunk,
+	 * setting loop points at the start and end of the data chunk.
+	 * 
+	 * @param waveFile
+	 */
+	private static void patch(File waveFile) {
+		
+		try {
+			RandomAccessFile file = new RandomAccessFile(waveFile, "r");
+			
+			// Also Find data location
+			int dataAddress = -1;
+			// Check if sample chunk already exists
+			int smplAddress = -1;
+			
+			for(int i = 0; i < file.length(); i += 4) {
+				
+				file.seek(i);
+				int scan = file.readInt();
+				
+				// match "data" chunk header
+				if(scan == ASCII_data)
+					dataAddress = i;
+				// match "smpl" chunk header
+				else if(scan == ASCII_smpl)
+					smplAddress = i;
+				
+				// if both chunks already located, stop seeking
+				if(smplAddress > -1 && dataAddress > -1)
+					break;
+				
+			}
+			
+			// Determine size of data chunk
+			if(dataAddress > -1) {
+				
+				file.seek(dataAddress + 4);
+				byte[] buffer = new byte[4];
+				file.read(buffer);
+				
+				int dataSize = 8 + buffer[3] 
+						+ buffer[2] * (int) Math.pow(16, 2) 
+						+ buffer[1] * (int) Math.pow(16, 4)
+						+ buffer[0] * (int) Math.pow(16, 6);
+				
+			} else throw new IOException("Data chunk not in file.");
+			
+			// Determine size of smpl chunk
+			if(smplAddress > -1) {
+				
+				file.seek(smplAddress + 4);
+				byte[] buffer = new byte[4];
+				file.read(buffer); // write size bytes to buffer
+				
+				// calculate expected chunk size
+				int smplSize = 8 + buffer[3] 
+						+ buffer[2] * (int) Math.pow(16, 2) 
+						+ buffer[1] * (int) Math.pow(16, 4)
+						+ buffer[0] * (int) Math.pow(16, 6);
+				
+			} // smpl chunk may not already exist
+			
+			// Create new sample chunk
+				// Insert 68-byte sample chunk with loop before data chunk
+			
+			byte[] smpl = new byte[68];
+			// smpl (0)
+			smpl[0] = 0x73;
+			smpl[1] = 0x6D;
+			smpl[2] = 0x70;
+			smpl[3] = 0x6C;
+			// size (4)
+			smpl[4] = 0x3C;
+			// manufacturer (8)
+			// product (12)
+			// sample period (16)
+			// MIDI unity note (20)
+			smpl[20] = 0x3C;
+			// MIDI pitch fraction (24)
+			// SMPTE Format (28)
+			// SMPTE Offset (32)
+			// Number of Sample Loops (36)
+			smpl[36] = 0x01;
+			// Sample Loops size (40)
+			// loop ID (44)
+			// loop type (48)
+				// data start
+			// loop start (52)
+				// data end
+			// loop end (56)
+			// tuning fraction (60)
+			// play count (64)
+			
+			
+			// Set loop points to start and end of data chunk
+			// Update the new file size in RIFF header
+			
+		} catch(IOException e) {
+			System.out.println("Failed to patch file.");
+		}
+		
+	}
+	
+	/**
+	 * Helper function to prompt user to select a WAV file.
+	 * 
+	 * @param reader
+	 * @return WAV file
+	 */
+	private static File retrieveWave(BufferedReader reader) {
+		
+		String prompt = "Please provide a WAV file: " + ANSI_BEIGE;
+		
+		File waveFile = null;
+		boolean valid = false;
+		do {
+			
+			// Retrieve an audio file
+			waveFile = retrieveFile(reader, prompt, ".wav");
+			
+			try {
+				// validate that chosen file is a proper Wave file
+				RandomAccessFile file = new RandomAccessFile(waveFile, "r");
+				// first 4 bytes start with RIFF
+				if(file.readInt() == ASCII_RIFF) {
+					// next 4 bytes contain the size of the file in little-endian representation
+					file.seek(4);
+					byte[] buffer = new byte[4];
+					file.read(buffer); // write size bytes to buffer
+					
+					// calculate expected file size
+					int headerSize = 8 + buffer[3] 
+							+ buffer[2] * (int) Math.pow(16, 2) 
+							+ buffer[1] * (int) Math.pow(16, 4)
+							+ buffer[0] * (int) Math.pow(16, 6);
+					
+					// file is valid if actual file length matches expected size
+					valid = headerSize == file.length();
+					if(!valid)
+						System.out.println("File length mismatch. Expected " + headerSize + " bytes, but found " + file.length() + " bytes.");
+					
+				} else System.out.println("Invalid RIFF header.");
+				file.close();
+			} catch (IOException e) {
+				System.out.println("Invalid file.");
+			}
+			
+		} while(!valid);
+		
+		return waveFile;
+		
+	}
+
+	/**
+	 * Helper function to prompt user to select a file.
+	 * 
+	 * @param reader
+	 * @return file
+	 */
+	private static File retrieveFile(BufferedReader reader, String prompt, String extension) {
+		
+		File file = null;
+		
+		String input = null;
+		boolean valid = false;
+		do {
+			System.out.print(prompt);
+			try {
+				input = reader.readLine();
+				file = new File(input);
+				if(file.exists()) {
+					if(file.getName().toLowerCase().endsWith(extension)) {
+						valid = true;
+					} else System.out.println("File does not have " + extension.toUpperCase() + " file extension");
+				} else System.out.println("File does not exist.");
+			} catch (IOException e) {
+				System.out.println(Ansi.colorize("Invalid file."));
+			}
+		} while(!valid);
+		
+		return file;
+		
+	}
+
+	/**
+	 * Helper function to prompt user to select a color.
+	 * 
+	 * @param reader
+	 * @return color attribute
+	 */
+	private static Attribute retrieveColor(BufferedReader reader) {
+		
+		String prompt = "\nCommand parameters: " + Ansi.colorize("Print", Attribute.BRIGHT_BLUE_TEXT()) 
+				+ Ansi.colorize(" [color]", Attribute.BRIGHT_YELLOW_TEXT()) + Ansi.colorize(" [message]", Attribute.BRIGHT_RED_TEXT()) 
+				+ "\n" 
+				+ "\n" + Ansi.colorize("Colors", Attribute.BRIGHT_YELLOW_TEXT(), Attribute.BOLD()) + ":"
+				+ "\n- " + Ansi.colorize("Default", Attribute.CLEAR())
+				+ "\n- " + Ansi.colorize("Black", Attribute.BLACK_TEXT()) 
+						+ ", " + Ansi.colorize("Gray", Attribute.BRIGHT_BLACK_TEXT()) 
+						+ ", " + Ansi.colorize("White", Attribute.BRIGHT_WHITE_TEXT())
+				+ "\n- " + Ansi.colorize("Indigo", Attribute.TEXT_COLOR(0x7D, 0x1A, 0xFF)) 
+						+ ", " + Ansi.colorize("Purple", Attribute.BRIGHT_MAGENTA_TEXT()) 
+						+ ", " + Ansi.colorize("Violet", Attribute.TEXT_COLOR(0xEE, 0x82, 0xEE))
+				+ "\n- " + Ansi.colorize("Red", Attribute.RED_TEXT()) 
+						+ ", " + Ansi.colorize("Cinnabar", Attribute.BRIGHT_RED_TEXT()) 
+						+ ", " + Ansi.colorize("Pink", Attribute.TEXT_COLOR(0xFF, 0xC0, 0xCB))
+				+ "\n- " + Ansi.colorize("Orange", Attribute.TEXT_COLOR(0xFF, 0x68, 0x1F)) 
+						+ ", " + Ansi.colorize("Gold", Attribute.YELLOW_TEXT()) 
+						+ ", " + Ansi.colorize("Yellow", Attribute.TEXT_COLOR(0xFF, 0xEA, 0x00))
+				+ "\n- " + Ansi.colorize("Green", Attribute.BRIGHT_GREEN_TEXT()) 
+						+ ", " + Ansi.colorize("Chartreuse", Attribute.TEXT_COLOR(0xD1, 0xEB, 0x27)) 
+						+ ", " + Ansi.colorize("Beige", Attribute.BRIGHT_YELLOW_TEXT())
+				+ "\n- " + Ansi.colorize("Blue", Attribute.BRIGHT_BLUE_TEXT()) 
+						+ ", " + Ansi.colorize("Teal", Attribute.TEXT_COLOR(0x00, 0x93, 0xCF)) 
+						+ ", " + Ansi.colorize("Cyan", Attribute.BRIGHT_CYAN_TEXT())
+				+ "\n" 
+				+ "\n" + Ansi.colorize("Please select a color:") + ANSI_BEIGE + " ";
+		String[] values = {"Default", "Black", "Gray", "White",	"Indigo", "Purple", "Violet", "Red", "Cinnabar", "Pink", "Orange", "Gold", 
+				"Yellow", "Green", "Chartreuse", "Beige","Blue", "Teal", "Cyan"};
+		
+		String input = retrieveInput(reader, prompt, values);
+		
+		Attribute color = null;
+		switch(input.toLowerCase()) {
+			case "default":		color = Attribute.CLEAR(); 						break;
+			case "black": 		color = Attribute.BLACK_TEXT(); 				break;
+			case "gray": 		color = Attribute.BRIGHT_BLACK_TEXT(); 			break;
+			case "white": 		color = Attribute.BRIGHT_WHITE_TEXT(); 			break;
+			case "indigo": 		color = Attribute.TEXT_COLOR(0x7D, 0x1A, 0xFF); break;
+			case "purple": 		color = Attribute.BRIGHT_MAGENTA_TEXT(); 		break;
+			case "violet": 		color = Attribute.TEXT_COLOR(0xEE, 0x82, 0xEE); break;
+			case "red": 		color = Attribute.RED_TEXT(); 					break;
+			case "cinnabar": 	color = Attribute.BRIGHT_RED_TEXT(); 			break;
+			case "pink": 		color = Attribute.TEXT_COLOR(0xFF, 0xC0, 0xCB); break;
+			case "orange":		color = Attribute.TEXT_COLOR(0xFF, 0x68, 0x1F);	break;
+			case "gold":		color = Attribute.YELLOW_TEXT();				break;
+			case "yellow":		color = Attribute.TEXT_COLOR(0xFF, 0xEA, 0x00);	break;
+			case "green": 		color = Attribute.BRIGHT_GREEN_TEXT(); 			break;
+			case "chartreuse": 	color = Attribute.TEXT_COLOR(0xD1, 0xEB, 0x27); break;
+			case "beige":		color = Attribute.BRIGHT_YELLOW_TEXT(); 		break;
+			case "blue":		color = Attribute.BRIGHT_BLUE_TEXT(); 			break;
+			case "teal":		color = Attribute.TEXT_COLOR(0x00, 0x93, 0xCF); break;
+			case "cyan":		color = Attribute.BRIGHT_CYAN_TEXT(); 			break;
+		}
+		
+		if(CMD_MODE)
+			System.out.println(ANSI_BACKLINE + Ansi.colorize("Please select a color: ") + Ansi.colorize(input, color) + "\n");
+		else System.out.println(Ansi.colorize(""));
+		
+		return color;
+		
+	}
+
+	/**
+	 * Helper function to prompt user to select a program task.
+	 * 
+	 * @param reader
+	 * @param input
+	 * @return operation
+	 */
+	private static String retrieveOperation(BufferedReader reader, String input) {
+		
+		String operation = null;
+		String[] values = {"extract", "package", "patch", "print", "exit"};
+		
+		if(input != null)
+			for(int i = 0; i < values.length; i++)
+				if(values[i].equalsIgnoreCase(input))
+					operation = values[i];
+		
+		if(operation == null) {
+		
+			String prompt = "\n" + Ansi.colorize("Operations", Attribute.BRIGHT_YELLOW_TEXT(), Attribute.BOLD()) + ":\n"
+					+ "- " + Ansi.colorize("Extract", Attribute.BRIGHT_RED_TEXT()) + " audio tracks from package\n"
+					+ "- " + Ansi.colorize("Package", Attribute.YELLOW_TEXT()) + " audio tracks into package\n"
+					+ "- " + Ansi.colorize("Patch", Attribute.BRIGHT_GREEN_TEXT()) + " audio track to loop indefinitely\n"
+					+ "- " + Ansi.colorize("Print", Attribute.BRIGHT_BLUE_TEXT()) + " Ridge Racer 6 style ASCII logo\n"
+					+ "- " + Ansi.colorize("Exit", Attribute.BRIGHT_MAGENTA_TEXT()) + " program\n"
+					+ "\nPlease select an operation: " + ANSI_BEIGE;
+			
+			operation = retrieveInput(reader, prompt, values);
+			
+			if(CMD_MODE) {
+				
+				Attribute color = null;
+				switch(operation.toLowerCase()) {
+					case "extract":
+						color = Attribute.BRIGHT_RED_TEXT();
+						break;
+					case "package":
+						color = Attribute.YELLOW_TEXT();
+						break;
+					case "patch":
+						color = Attribute.BRIGHT_GREEN_TEXT();
+						break;
+					case "print":
+						color = Attribute.BRIGHT_BLUE_TEXT();
+						break;
+					case "exit":
+						color = Attribute.BRIGHT_MAGENTA_TEXT();
+						break;
+				}
+				System.out.println(ANSI_BACKLINE + Ansi.colorize("Please select an operation: ") + Ansi.colorize(operation, color));
+				
+			} else System.out.print(Ansi.colorize(""));
+		
+		}
+		
+		return operation.toLowerCase();
+		
+	}
+
+	/**
+	 * Prompts the user for input without strict validation.
+	 * 
+	 * @param reader
+	 * @param prompt
+	 * @return input
+	 */
+	private static String retrieveInput(BufferedReader reader, String prompt) {
+		
+		String input = null;
+		
+		boolean valid = false;
+		do {
+			System.out.print(prompt);
+			try {
+				input = reader.readLine();
+				valid = true;
+			} catch (IOException e) {
+				System.out.println(Ansi.colorize("Invalid input."));
+			}
+		} while(!valid);
+		
+		return input;
+		
+	}
+	
+	/**
+	 * Prompts the user for input and validates that the input matches one of the provided values.
+	 * 
+	 * @param reader
+	 * @param prompt
+	 * @param values
+	 * @return input
+	 */
+	private static String retrieveInput(BufferedReader reader, String prompt, String[] values) {
+		
+		String input = null;
+		
+		boolean valid = false;
+		do {
+			System.out.print(prompt);
+			try {
+				input = reader.readLine();
+				for(int i = 0; i < values.length; i++)
+					if(input.equalsIgnoreCase(values[i])) {
+						valid = true;
+						break;
+					}
+				if(!valid)
+					System.out.println(Ansi.colorize("Invalid selection."));
+			} catch (IOException e) {
+				System.out.println(Ansi.colorize("Invalid selection."));
+			}
+		} while(!valid);
+		
+		return input;
+		
+	}
+	
+	/**
+	 * Helper function to read the size of a file chunk.
+	 * 
+	 * @param file
+	 * @param chunkAddress
+	 * @return chunk size
+	 * @throws IOException 
+	 */
+	private static int readChunkSize(File file, int chunkAddress) throws IOException {
+		
+		RandomAccessFile accessedFile = new RandomAccessFile(file, "r");
+		return readChunkSize(accessedFile, chunkAddress);
+		
+	}
+	
+	/**
+	 * Helper function to read the size of a file chunk.
+	 * 
+	 * @param accessedFile
+	 * @param chunkAddress
+	 * @return chunk size
+	 * @throws IOException 
+	 */
+	private static int readChunkSize(RandomAccessFile file, int chunkAddress) throws IOException {
+		
+		byte[] buffer = new byte[4];		
+		
+		file.seek(chunkAddress + 4);
+		file.read(buffer);
+			
+		return 8	// size offset 
+				+ buffer[3] 				// 16^0
+				+ buffer[2] * 256 			// 16^2 
+				+ buffer[1] * 65_536		// 16^4
+				+ buffer[0] * 16_777_216;	// 16^6
+		
+	}
 
 	/**
 	 * Creates a map of audio tracks within provided file.
@@ -697,7 +837,6 @@ public class AudioExtractor {
 	public static LinkedHashMap<Integer, Integer> findAudioTracks(RandomAccessFile file) throws IOException {
 		
 		LinkedHashMap<Integer, Integer> tracklist = new LinkedHashMap<Integer, Integer>();
-		int key = 0x52494646; // "RIFF" in ASCII representation 
 		
 		// Files start on addresses divisible by 0x800
 		for(int a = 0; a + 0x800 < file.length(); a += 0x800) {
@@ -705,7 +844,7 @@ public class AudioExtractor {
 			file.seek(a);
 			
 			// File header starts with "RIFF" sequence
-			if(file.readInt() == key) {
+			if(file.readInt() == ASCII_RIFF) {
 				
 				// Next 4 bytes specify file length beyond first 8 bytes, in little-endian representation
 				int length = 8;
@@ -725,11 +864,6 @@ public class AudioExtractor {
 		
 	}
 
-
-	private static String logoFormat(String string, boolean italic) {
-		return logoFormat(string, italic, 10);
-	}
-	
 	/**
 	 * Creates an ASCII logo in RR6 style using the provided text.
 	 * Supports alphanumeric text with spaces only.
@@ -741,6 +875,18 @@ public class AudioExtractor {
 	public static String logoFormat(String text) {
 		return logoFormat(text, true, 10);
 	}
+
+	/**
+	 * Creates an ASCII logo in RR6 style using the provided text.
+	 * Supports alphanumeric text with spaces only.
+	 * 
+	 * @param string
+	 * @param italicize logo
+	 * @return logo formatted text
+	 */
+	private static String logoFormat(String string, boolean italic) {
+		return logoFormat(string, italic, 10);
+	}
 	
 	/**
 	 * Creates an ASCII logo in RR6 style using the provided text.