// // GameFile.m // Cog // // Created by Vincent Spader on 5/29/06. // Copyright 2006 Vincent Spader. All rights reserved. // #import "GameDecoder.h" #import "Logging.h" #import "PlaylistController.h" @implementation GameDecoder gme_err_t readCallback( void* data, void* out, long count ) { id source = (__bridge id)data; DLog(@"Amount: %li", count); int n = (int) [source read:out amount:count]; DLog(@"Read: %i", n); if (n <= 0) { DLog(@"ERROR!"); return (gme_err_t)1; //Return non-zero for error } return 0; //Return 0 for no error } - (id)init { self = [super init]; if (self) { emu = NULL; } return self; } - (BOOL)open:(id)s { [self setSource:s]; //We need file-size to use GME if (![source seekable]) { return NO; } gme_err_t error; NSString *ext = [[[source url] pathExtension] lowercaseString]; gme_type_t type = gme_identify_extension([ext UTF8String]); if (!type) { ALog(@"GME: No type!"); return NO; } emu = gme_new_emu(type, 44100); if (!emu) { ALog(@"GME: No new emu!"); return NO; } [source seek:0 whence:SEEK_END]; long size = [source tell]; [source seek:0 whence:SEEK_SET]; DLog(@"Size: %li", size); error = gme_load_custom(emu, readCallback, size, (__bridge void *)(s)); if (error) { ALog(@"GME: ERROR Loding custom!"); return NO; } NSURL *m3uurl = [[source url] URLByDeletingPathExtension]; m3uurl = [m3uurl URLByAppendingPathExtension:@"m3u"]; id audioSourceClass = NSClassFromString(@"AudioSource"); id 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 = [[[source url] fragment] intValue]; //What if theres no fragment? Assuming we get 0. gme_info_t * info; error = gme_track_info( emu, &info, track_num ); if (error) { ALog(@"Unable to get track info"); return NO; } //As recommended if (info->length > 0) { DLog(@"Using length: %i", info->length); length = info->length; } else if (info->loop_length > 0) { DLog(@"Using loop length: %i", info->loop_length); length = info->intro_length + 2*info->loop_length; } else { length = 150000; DLog(@"Setting default: %li", length); } if (info->fade_length >= 0) { fade = info->fade_length; } else { fade = 8000; } gme_free_info( info ); DLog(@"Length: %li", length); DLog(@"Track num: %i", track_num); error = gme_start_track(emu, track_num); if (error) { ALog(@"GME: Error starting track"); return NO; } length += fade; [self willChangeValueForKey:@"properties"]; [self didChangeValueForKey:@"properties"]; return YES; } - (NSDictionary *)properties { return [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:0], @"bitrate", [NSNumber numberWithFloat:44100], @"sampleRate", [NSNumber numberWithLong:length*44.1], @"totalFrames", [NSNumber numberWithInt:sizeof(short)*8], @"bitsPerSample", //Samples are short [NSNumber numberWithInt:2], @"channels", //output from gme_play is in stereo [NSNumber numberWithBool:[source seekable]], @"seekable", @"host", @"endian", nil]; } - (int)readAudio:(void *)buf frames:(UInt32)frames { int numSamples = frames * 2; //channels = 2 if (gme_track_ended(emu)) { return 0; } if ( IsRepeatOneSet() ) gme_set_fade( emu, -1, 0 ); else gme_set_fade( emu, (int)(length - fade), fade ); gme_play(emu, numSamples, (short int *)buf); //Some formats support length, but we'll add that in the future. //(From gme.txt) If track length, then use it. If loop length, play for intro + loop * 2. Otherwise, default to 2.5 minutes return frames; //GME will always generate samples. There's no real EOS. } - (long)seek:(long)frame { gme_err_t error; error = gme_seek(emu, frame/44.1); if (error) { return -1; } return frame; } - (void)close { if (emu) { gme_delete(emu); emu = NULL; } if (source) { [source close]; [self setSource:nil]; } } - (void)dealloc { [self close]; } + (NSArray *)fileTypes { return [NSArray arrayWithObjects:@"ay", @"gbs", @"hes", @"kss", @"nsf", @"nsfe", @"sap", @"sfm", @"sgc", @"spc", @"vgm", @"vgz", nil]; } + (NSArray *)mimeTypes { return nil; } + (float)priority { return 1.0; } - (void)setSource:(id)s { source = s; } - (id)source { return source; } @end