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MidiFile.h
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MidiFile.h
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/*
* Copyright (c) 2007-2011 Madhav Vaidyanathan
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#import <Foundation/NSObject.h>
#import <Foundation/NSArray.h>
#import <Foundation/NSString.h>
#import <Foundation/NSZone.h>
#import <Foundation/NSException.h>
#import "Array.h"
#import "TimeSignature.h"
/** @struct MidiSoundOptions
*
* The MidiSoundOptions class contains the available options for
* modifying the midi sound/sound during playback.
*/
struct _MidiSoundOptions {
int tempo; /** The tempo, in microseconds per quarter note */
int transpose; /** The amount to transpose each note by */
int shifttime; /** Shift the start time by the given amount */
int pauseTime; /** Start the midi music at the given pause time */
int numtracks; /** The number of tracks */
IntArray *tracks; /** Which tracks to include (true = include) */
BOOL useDefaultInstruments; /** If true, don't change instruments */
IntArray *instruments; /** The instruments to use per track */
};
typedef struct _MidiSoundOptions MidiSoundOptions;
/** @struct SheetMusicOptions
* The SheetMusicOptions class contains the available options for
* modifying the midi sheet music.
*/
struct _SheetMusicOptions {
IntArray *tracks; /** Which tracks to display (true = display) */
BOOL scrollVert; /** Whether to scroll vertically or horizontally */
int numtracks; /** Total number of tracks */
BOOL largeNoteSize; /** Display large or small note sizes */
BOOL twoStaffs; /** Combine tracks into two staffs ? */
BOOL showNoteLetters; /** Show the letters (A, A#, etc) next to the notes */
int shifttime; /** Shift note starttimes by the given amount */
int transpose; /** Shift note key up/down by given amount */
id key; /** Use the given KeySignature */
TimeSignature *time; /** Use the given time signature */
int combineInterval; /** Combine notes within given time interval (msec) */
};
typedef struct _SheetMusicOptions SheetMusicOptions;
@interface MidiFileException : NSException {
}
+(id)init:(NSString*)reason offset:(int)off;
@end
@interface MidiEvent : NSObject <NSCopying> {
int deltaTime; /** The time between the previous event and this on */
int startTime; /** The absolute time this event occurs */
bool hasEventflag; /** False if this is using the previous eventflag */
u_char eventFlag; /** NoteOn, NoteOff, etc. Full list is in class MidiFile */
u_char channel; /** The channel this event occurs on */
u_char notenumber; /** The note number */
u_char velocity; /** The volume of the note */
u_char instrument; /** The instrument */
u_char keyPressure; /** The key pressure */
u_char chanPressure; /** The channel pressure */
u_char controlNum; /** The controller number */
u_char controlValue; /** The controller value */
u_short pitchBend; /** The pitch bend value */
u_char numerator; /** The numerator, for TimeSignature meta events */
u_char denominator; /** The denominator, for TimeSignature meta events */
int tempo; /** The tempo, for Tempo meta events */
u_char metaevent; /** The metaevent, used if eventflag is MetaEvent */
int metalength; /** The metaevent length */
u_char* metavalue; /** The raw byte value, for Sysex and meta events */
}
-(id)init;
-(int)deltaTime;
-(int)startTime;
-(bool)hasEventflag;
-(u_char)eventFlag;
-(u_char)channel;
-(u_char)notenumber;
-(u_char)velocity;
-(u_char)instrument;
-(u_char)keyPressure;
-(u_char)chanPressure;
-(u_char)controlNum;
-(u_char)controlValue;
-(u_short)pitchBend;
-(int)numerator;
-(int)denominator;
-(int)tempo;
-(u_char)metaevent;
-(int)metalength;
-(u_char*)metavalue;
-(void)setDeltaTime:(int) value;
-(void)setStartTime:(int) value;
-(void)setHasEventflag:(bool) value;
-(void)setEventFlag:(u_char) value;
-(void)setChannel:(u_char) value;
-(void)setNotenumber:(u_char) value;
-(void)setVelocity:(u_char) value;
-(void)setInstrument:(u_char) value;
-(void)setKeyPressure:(u_char) value;
-(void)setChanPressure:(u_char) value;
-(void)setControlNum:(u_char) value;
-(void)setControlValue:(u_char) value;
-(void)setPitchBend:(u_short) value;
-(void)setNumerator:(int) value;
-(void)setDenominator:(int) value;
-(void)setTempo:(int) value;
-(void)setMetaevent:(u_char) value;
-(void)setMetalength:(int) value;
-(void)setMetavalue:(u_char*) value;
-(id)copyWithZone:(NSZone*)zone;
-(void)dealloc;
@end
@interface MidiNote : NSObject <NSCopying> {
int starttime; /** The start time, in pulses */
int channel; /** The channel */
int notenumber; /** The note, from 0 to 127. Middle C is 60 */
int duration; /** The duration, in pulses */
}
-(int)startTime;
-(void)setStarttime:(int)value;
-(int)channel;
-(void)setChannel:(int)value;
-(int)number;
-(void)setNumber:(int)value;
-(int)duration;
-(void)setDuration:(int)value;
-(int)endTime;
-(void)noteOff:(int)endtime;
-(id)copyWithZone:(NSZone*)zone;
-(NSString*)description;
@end
int sortbynote(void* note1, void* note2);
int sortbytime(void* note1, void* note2);
@interface MidiTrack : NSObject <NSCopying> {
int tracknum; /** The track number */
Array* notes; /** Array of Midi notes */
int instrument; /** Instrument for this track */
}
-(id)initWithTrack:(int)tracknum;
-(id)initWithEvents:(Array*)events andTrack:(int)tracknum;
-(void)dealloc;
-(int)number;
-(void)setNumber:(int)value;
-(Array*)notes;
-(NSString*)instrumentName;
-(int)instrument;
-(void)setInstrument:(int)value;
-(NSString*)description;
-(void)addNote:(MidiNote *)m;
-(void)noteOffWithChannel:(int)channel andNumber:(int)num andTime:(int)endtime;
-(id)copyWithZone:(NSZone *)zone;
@end
@interface MidiFileReader : NSObject {
u_char *data; /** The entire midi file data */
int datalen; /** The data length */
int parse_offset; /** The current offset while parsing */
}
-(id)initWithFile:(NSString*)filename;
-(void)checkRead:(int)amount;
-(u_char)peek;
-(u_char)readByte;
-(u_short)readShort;
-(int)readInt;
-(u_char*)readBytes:(int)len;
-(char*)readAscii:(int)len;
-(int)readVarlen;
-(void)skip:(int)amount;
-(int)offset;
-(void)dealloc;
@end
@interface MidiFile : NSObject {
NSString* filename; /** The Midi file name */
Array* events; /** Array< Array<MidiEvent>> : the raw midi events */
Array *tracks; /** The tracks (MidiTrack) of the midifile that have notes */
u_short trackmode; /** 0 (single track), 1 (simultaneous tracks) 2 (independent tracks) */
TimeSignature* timesig; /** The time signature */
int quarternote; /** The number of pulses per quarter note */
int totalpulses; /** The total length of the song, in pulses */
BOOL trackPerChannel; /** True if we've split each channel into a track */
}
-(id)initWithFile:(NSString*)path;
-(Array*)readTrack:(MidiFileReader*)file;
-(Array*)tracks;
-(TimeSignature*)time;
-(NSString*)filename;
-(NSString*)description;
-(int)totalpulses;
-(IntArray*)guessMeasureLength;
-(BOOL)changeSound:(MidiSoundOptions *)options toFile:(NSString*)filename;
-(BOOL)changeSoundPerChannel:(MidiSoundOptions *)options toFile:(NSString*)filename;
-(Array*)changeSheetMusicOptions:(SheetMusicOptions*)options;
+(void)findHighLowNotes:(Array*)notes withMeasure:(int)measurelen startIndex:(int)startindex
fromStart:(int)starttime toEnd:(int)endtime withHigh:(int*)high
andLow:(int*)low;
+(void)findExactHighLowNotes:(Array*)notes startIndex:(int)startindex
withStart:(int)starttime withHigh:(int*)high
andLow:(int*)low;
+(Array*)splitTrack:(MidiTrack *)track withMeasure:(int)measurelen;
+(Array*)splitChannels:(MidiTrack *)track withEvents:(Array*)events;
+(MidiTrack*) combineToSingleTrack:(Array *)tracks;
+(Array*) combineToTwoTracks:(Array *)tracks withMeasure:(int)measurelen;
+(void)checkStartTimes:(Array *)tracks;
+(void)roundStartTimes:(Array *)tracks toInterval:(int)millisec withTime:(TimeSignature*)time;
+(void)roundDurations:(Array *)tracks withQuarter:(int)quarternote;
+(void)shiftTime:(Array*)tracks byAmount:(int)amount;
+(void)transpose:(Array*)tracks byAmount:(int)amount;
+(BOOL)hasMultipleChannels:(MidiTrack*) track;
+(NSArray*) instrumentNames;
+(int)getTrackLength:(Array*)events;
+(BOOL)writeMidiFile:(NSString*)filename withEvents:(Array*)events andMode:(int)mode andQuarter:(int)quarter;
+(Array*)cloneMidiEvents:(Array*)origlist;
+(void) addTempoEvent:(Array*)eventlist withTempo:(int)tempo;
+(Array*)startAtPauseTime:(int)pauseTime withEvents:(Array*)list;
@end