283 lines
6.8 KiB
Objective-C
283 lines
6.8 KiB
Objective-C
//
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// CueSheet.m
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// CueSheet
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//
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// Created by Zaphod Beeblebrox on 10/8/07.
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// Copyright 2007 __MyCompanyName__. All rights reserved.
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//
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#import "CueSheet.h"
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#import "CueSheetTrack.h"
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#import "Plugin.h"
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@implementation CueSheet
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+ (id)cueSheetWithFile:(NSString *)filename
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{
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return [[[CueSheet alloc] initWithFile:filename] autorelease];
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}
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- (NSURL *)urlForPath:(NSString *)path relativeTo:(NSString *)baseFilename
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{
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NSRange protocolRange = [path rangeOfString:@"://"];
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if (protocolRange.location != NSNotFound)
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{
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return [NSURL URLWithString:path];
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}
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NSMutableString *unixPath = [path mutableCopy];
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//Get the fragment
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NSString *fragment = @"";
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NSScanner *scanner = [NSScanner scannerWithString:unixPath];
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NSCharacterSet *characterSet = [NSCharacterSet characterSetWithCharactersInString:@"#1234567890"];
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while (![scanner isAtEnd]) {
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NSString *possibleFragment;
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[scanner scanUpToString:@"#" intoString:nil];
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if ([scanner scanCharactersFromSet:characterSet intoString:&possibleFragment] && [scanner isAtEnd])
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{
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fragment = possibleFragment;
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[unixPath deleteCharactersInRange:NSMakeRange([scanner scanLocation] - [possibleFragment length], [possibleFragment length])];
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break;
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}
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}
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if (![unixPath hasPrefix:@"/"]) {
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//Only relative paths would have windows backslashes.
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[unixPath replaceOccurrencesOfString:@"\\" withString:@"/" options:0 range:NSMakeRange(0, [unixPath length])];
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NSString *basePath = [[[baseFilename stringByStandardizingPath] stringByDeletingLastPathComponent] stringByAppendingString:@"/"];
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[unixPath insertString:basePath atIndex:0];
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}
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//Append the fragment
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return [NSURL URLWithString:[[[NSURL fileURLWithPath:unixPath] absoluteString] stringByAppendingString: fragment]];
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}
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- (void)parseFile:(NSString *)filename
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{
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NSStringEncoding encoding;
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NSError *error = nil;
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NSString *contents = [NSString stringWithContentsOfFile:filename usedEncoding:&encoding error:&error];
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if (error) {
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error = nil;
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contents = [NSString stringWithContentsOfFile:filename encoding:NSUTF8StringEncoding error:&error];
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}
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if (error) {
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error = nil;
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contents = [NSString stringWithContentsOfFile:filename encoding:NSWindowsCP1251StringEncoding error:&error];
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}
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if (error) {
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error = nil;
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contents = [NSString stringWithContentsOfFile:filename encoding:NSISOLatin1StringEncoding error:&error];
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}
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if (error || !contents) {
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NSLog(@"Could not open file...%@ %@ %@", filename, contents, error);
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return;
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}
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NSMutableArray *entries = [[NSMutableArray alloc] init];
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NSString *track = nil;
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NSString *path = nil;
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NSString *artist = nil;
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NSString *album = nil;
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NSString *title = nil;
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NSString *genre = nil;
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NSString *year = nil;
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BOOL trackAdded = NO;
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NSCharacterSet *whitespace = [NSCharacterSet whitespaceAndNewlineCharacterSet];
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NSString *line;
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NSScanner *scanner = nil;
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NSEnumerator *e = [[contents componentsSeparatedByString:@"\n"] objectEnumerator];
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while (line = [e nextObject])
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{
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[scanner release];
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scanner = [[NSScanner alloc] initWithString:line];
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NSString *command;
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if (![scanner scanUpToCharactersFromSet:whitespace intoString:&command]) {
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continue;
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}
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//FILE "filename.shn" WAVE
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if ([command isEqualToString:@"FILE"]) {
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trackAdded = NO;
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if (![scanner scanString:@"\"" intoString:nil]) {
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continue;
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}
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//Read in the path
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if (![scanner scanUpToString:@"\"" intoString:&path]) {
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continue;
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}
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}
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//TRACK 01 AUDIO
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else if ([command isEqualToString:@"TRACK"]) {
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trackAdded = NO;
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if (![scanner scanUpToCharactersFromSet:whitespace intoString:&track]) {
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continue;
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}
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NSString *type = nil;
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if (![scanner scanUpToCharactersFromSet:whitespace intoString:&type]
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|| ![type isEqualToString:@"AUDIO"]) {
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continue;
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}
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}
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//INDEX 01 00:00:10
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//Note that time is written in Minutes:Seconds:Frames, where frames are 1/75 of a second
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else if ([command isEqualToString:@"INDEX"]) {
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if (trackAdded) {
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continue;
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}
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if (!path) {
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continue;
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}
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NSString *index = nil;
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if (![scanner scanUpToCharactersFromSet:whitespace intoString:&index] || [index intValue] != 1) {
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continue;
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}
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[scanner scanCharactersFromSet:whitespace intoString:nil];
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NSString *time = nil;
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if (![scanner scanUpToCharactersFromSet:whitespace intoString:&time]) {
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continue;
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}
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NSArray *msf = [time componentsSeparatedByString:@":"];
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if ([msf count] != 3) {
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continue;
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}
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double seconds = (60*[[msf objectAtIndex:0] intValue]) + [[msf objectAtIndex:1] intValue] + ([[msf objectAtIndex:2] floatValue]/75);
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if (track == nil) {
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track = @"01";
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}
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//Need to add basePath, and convert to URL
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[entries addObject:
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[CueSheetTrack trackWithURL:[self urlForPath:path relativeTo:filename]
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track: track
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time: seconds
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artist:artist
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album:album
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title:title
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genre:genre
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year:year]];
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trackAdded = YES;
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}
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else if ([command isEqualToString:@"PERFORMER"])
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{
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if (![scanner scanString:@"\"" intoString:nil]) {
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continue;
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}
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//Read in the path
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if (![scanner scanUpToString:@"\"" intoString:&artist]) {
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continue;
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}
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}
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else if ([command isEqualToString:@"TITLE"])
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{
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NSString **titleDest;
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if (!path) //Have not come across a file yet.
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titleDest = &album;
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else
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titleDest = &title;
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if (![scanner scanString:@"\"" intoString:nil]) {
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continue;
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}
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//Read in the path
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if (![scanner scanUpToString:@"\"" intoString:titleDest]) {
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continue;
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}
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}
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else if ([command isEqualToString:@"REM"]) //Additional metadata sometimes stored in comments
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{
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NSString *type;
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if ( ![scanner scanUpToCharactersFromSet:whitespace intoString:&type]) {
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continue;
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}
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if ([type isEqualToString:@"GENRE"])
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{
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//NSLog(@"GENRE!");
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if ([scanner scanString:@"\"" intoString:nil]) {
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//NSLog(@"QUOTED");
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if (![scanner scanUpToString:@"\"" intoString:&genre]) {
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NSLog(@"FAILED TO SCAN");
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continue;
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}
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}
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else {
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//NSLog(@"UNQUOTED");
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if ( ![scanner scanUpToCharactersFromSet:whitespace intoString:&genre]) {
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continue;
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}
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}
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}
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else if ([type isEqualToString:@"DATE"])
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{
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//NSLog(@"DATE!");
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if ( ![scanner scanUpToCharactersFromSet:whitespace intoString:&year]) {
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continue;
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}
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}
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}
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}
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[scanner release];
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tracks = [entries copy];
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[entries release];
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}
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- (id)initWithFile:(NSString *)filename
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{
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self = [super init];
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if (self) {
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[self parseFile:filename];
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}
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return self;
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}
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- (NSArray *)tracks
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{
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return tracks;
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}
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- (CueSheetTrack *)track:(NSString *)fragment
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{
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CueSheetTrack *t;
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NSEnumerator *e = [tracks objectEnumerator];
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while (t = [e nextObject]) {
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if ([[t track] isEqualToString:fragment]) {
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return t;
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}
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}
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return nil;
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}
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@end
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