cog/Plugins/GME/GameMetadataReader.m

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//
// GameMetadataReader.m
// GME
//
// Created by Vincent Spader on 10/12/07.
// Copyright 2007 __MyCompanyName__. All rights reserved.
//
#import "GameMetadataReader.h"
#import "GameDecoder.h"
#import <GME/gme.h>
#import "Logging.h"
@implementation GameMetadataReader
+ (NSArray *)fileTypes {
return [GameDecoder fileTypes];
}
+ (NSArray *)mimeTypes {
return [GameDecoder mimeTypes];
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}
+ (float)priority {
return 1.0f;
}
+ (NSDictionary *)metadataForURL:(NSURL *)url {
id audioSourceClass = NSClassFromString(@"AudioSource");
id<CogSource> source = [audioSourceClass audioSourceForURL:url];
if(![source open:url])
return 0;
if(![source seekable])
return 0;
NSString *ext = [[url pathExtension] lowercaseString];
gme_type_t type = gme_identify_extension([ext UTF8String]);
if(!type) {
ALog(@"GME: No type!");
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return nil;
}
Music_Emu *emu;
emu = gme_new_emu(type, gme_info_only);
if(!emu) {
ALog(@"GME: No new emu!");
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return nil;
}
[source seek:0 whence:SEEK_END];
long size = [source tell];
[source seek:0 whence:SEEK_SET];
gme_err_t error;
error = gme_load_custom(emu, readCallback, size, (__bridge void *)(source));
if(error) {
ALog(@"GME: ERROR Loding file!");
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return nil;
}
NSURL *m3uurl = [url URLByDeletingPathExtension];
m3uurl = [m3uurl URLByAppendingPathExtension:@"m3u"];
id<CogSource> m3usrc = [audioSourceClass audioSourceForURL:m3uurl];
if([m3usrc open:m3uurl]) {
if([m3usrc seekable]) {
[m3usrc seek:0 whence:SEEK_END];
long size = [m3usrc tell];
[m3usrc seek:0 whence:SEEK_SET];
void *data = malloc(size);
[m3usrc read:data amount:size];
gme_load_m3u_data(emu, data, size);
free(data);
}
}
int track_num;
if([[url fragment] length] == 0)
track_num = 0;
else
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track_num = [[url fragment] intValue];
gme_info_t *info;
error = gme_track_info(emu, &info, track_num);
if(error) {
ALog(@"GME: Unable to get track info");
}
gme_delete(emu);
NSString *title = [NSString stringWithUTF8String:info->song];
if(!title || ![title length]) {
// this is needed to distinguish between different tracks in NSF, for example
// otherwise they will all be displayed as 'blahblah.nsf' in playlist
title = [[url lastPathComponent] stringByAppendingFormat:@" [%d]", track_num];
}
NSDictionary *dict = @{@"genre": [NSString stringWithUTF8String:info->system],
@"album": [NSString stringWithUTF8String:info->game],
@"title": title,
@"artist": [NSString stringWithUTF8String:info->author],
@"track": [NSNumber numberWithInt:track_num + 1]};
gme_free_info(info);
return dict;
}
@end