/** The MidiFile and/or SheetMusic has changed. Stop any playback sound,
* and store the current midifile and sheet music.
*/
public void SetMidiFile(MidiFile file, MidiOptions opt, SheetMusic s)
{
/* If we're paused, and using the same midi file, redraw the
* highlighted notes.
*/
if ((file == midifile && midifile != null && playstate == paused))
{
options = opt;
sheet = s;
sheet.ShadeNotes((int)currentPulseTime, (int)-10, false);
/* We have to wait some time (200 msec) for the sheet music
* to scroll and redraw, before we can re-shade.
*/
Timer redrawTimer = new Timer();
redrawTimer.Interval = 200;
redrawTimer.Tick += new EventHandler(ReShade);
redrawTimer.Enabled = true;
redrawTimer.Start();
}
else
{
this.Stop(null, null);
midifile = file;
options = opt;
sheet = s;
}
this.DeleteSoundFile();
}
CreateStaffs(List <MusicSymbol>[] allsymbols, KeySignature key,
MidiOptions options, int measurelen)
{
List <Staff>[] trackstaffs = new List <Staff> [allsymbols.Length];
int totaltracks = trackstaffs.Length;
for (int track = 0; track < totaltracks; track++)
{
List <MusicSymbol> symbols = allsymbols[track];
trackstaffs[track] = CreateStaffsForTrack(symbols, measurelen, key, options, track, totaltracks);
}
/* Update the EndTime of each Staff. EndTime is used for playback */
foreach (List <Staff> list in trackstaffs)
{
for (int i = 0; i < list.Count - 1; i++)
{
list[i].EndTime = list[i + 1].StartTime;
}
}
/* Interleave the staffs of each track into the result array. */
int maxstaffs = 0;
for (int i = 0; i < trackstaffs.Length; i++)
{
if (maxstaffs < trackstaffs[i].Count)
{
maxstaffs = trackstaffs[i].Count;
}
}
List <Staff> result = new List <Staff>(maxstaffs * trackstaffs.Length);
for (int i = 0; i < maxstaffs; i++)
{
foreach (List <Staff> list in trackstaffs)
{
if (i < list.Count)
{
result.Add(list[i]);
}
}
}
return(result);
}
private int measureLength; /** The time (in pulses) of a measure */
/** Create a new staff with the given list of music symbols,
* and the given key signature. The clef is determined by
* the clef of the first chord symbol. The track number is used
* to determine whether to join this left/right vertical sides
* with the staffs above and below. The SheetMusicOptions are used
* to check whether to display measure numbers or not.
*/
public Staff(List <MusicSymbol> symbols, KeySignature key,
MidiOptions options,
int tracknum, int totaltracks)
{
keysigWidth = SheetMusic.KeySignatureWidth(key);
this.tracknum = tracknum;
this.totaltracks = totaltracks;
showMeasures = (options.showMeasures && tracknum == 0);
measureLength = options.time.Measure;
Clef clef = FindClef(symbols);
clefsym = new ClefSymbol(clef, 0, false);
keys = key.GetSymbols(clef);
this.symbols = symbols;
CalculateWidth(options.scrollVert);
CalculateHeight();
CalculateStartEndTime();
FullJustify();
}
/** Set the MidiFile to use.
* Save the list of midi notes. Each midi note includes the note Number
* and StartTime (in pulses), so we know which notes to shade given the
* current pulse time.
*/
public void SetMidiFile(MidiFile midifile, MidiOptions options)
{
if (midifile == null)
{
notes = null;
useTwoColors = false;
return;
}
List <MidiTrack> tracks = midifile.ChangeMidiNotes(options);
MidiTrack track = MidiFile.CombineToSingleTrack(tracks);
notes = track.Notes;
maxShadeDuration = midifile.Time.Quarter * 2;
/* We want to know which track the note came from.
* Use the 'channel' field to store the track.
*/
for (int tracknum = 0; tracknum < tracks.Count; tracknum++)
{
foreach (MidiNote note in tracks[tracknum].Notes)
{
note.Channel = tracknum;
}
}
/* When we have exactly two tracks, we assume this is a piano song,
* and we use different colors for highlighting the left hand and
* right hand notes.
*/
useTwoColors = false;
if (tracks.Count == 2)
{
useTwoColors = true;
}
showNoteLetters = options.showNoteLetters;
this.Invalidate();
}
/** Create a new SheetMusic control, using the given midi filename.
* The options can be null.
*/
public SheetMusic(string filename, MidiOptions options)
{
MidiFile file = new MidiFile(filename);
init(file, options);
}
/** Create a new SheetMusic control, using the given parsed MidiFile.
* The options can be null.
*/
public SheetMusic(MidiFile file, MidiOptions options)
{
init(file, options);
}
CreateStaffsForTrack(List <MusicSymbol> symbols, int measurelen,
KeySignature key, MidiOptions options,
int track, int totaltracks)
{
int keysigWidth = KeySignatureWidth(key);
int startindex = 0;
List <Staff> thestaffs = new List <Staff>(symbols.Count / 50);
while (startindex < symbols.Count)
{
/* startindex is the index of the first symbol in the staff.
* endindex is the index of the last symbol in the staff.
*/
int endindex = startindex;
int width = keysigWidth;
int maxwidth;
/* If we're scrolling vertically, the maximum width is PageWidth. */
if (scrollVert)
{
maxwidth = SheetMusic.PageWidth;
}
else
{
maxwidth = 2000000;
}
while (endindex < symbols.Count &&
width + symbols[endindex].Width < maxwidth)
{
width += symbols[endindex].Width;
endindex++;
}
endindex--;
/* There's 3 possibilities at this point:
* 1. We have all the symbols in the track.
* The endindex stays the same.
*
* 2. We have symbols for less than one measure.
* The endindex stays the same.
*
* 3. We have symbols for 1 or more measures.
* Since measures cannot span multiple staffs, we must
* make sure endindex does not occur in the middle of a
* measure. We count backwards until we come to the end
* of a measure.
*/
if (endindex == symbols.Count - 1)
{
/* endindex stays the same */
}
else if (symbols[startindex].StartTime / measurelen ==
symbols[endindex].StartTime / measurelen)
{
/* endindex stays the same */
}
else
{
int endmeasure = symbols[endindex + 1].StartTime / measurelen;
while (symbols[endindex].StartTime / measurelen ==
endmeasure)
{
endindex--;
}
}
int range = endindex + 1 - startindex;
if (scrollVert)
{
width = SheetMusic.PageWidth;
}
Staff staff = new Staff(symbols.GetRange(startindex, range),
key, options, track, totaltracks);
thestaffs.Add(staff);
startindex = endindex + 1;
}
return(thestaffs);
}
/** Create a new SheetMusic control.
* MidiFile is the parsed midi file to display.
* SheetMusic Options are the menu options that were selected.
*
* - Apply all the Menu Options to the MidiFile tracks.
* - Calculate the key signature
* - For each track, create a list of MusicSymbols (notes, rests, bars, etc)
* - Vertically align the music symbols in all the tracks
* - Partition the music notes into horizontal staffs
*/
public void init(MidiFile file, MidiOptions options)
{
if (options == null)
{
options = new MidiOptions(file);
}
zoom = 1.0f;
filename = file.FileName;
SetColors(options.colors, options.shadeColor, options.shade2Color);
pen = new Pen(Color.Black, 1);
List <MidiTrack> tracks = file.ChangeMidiNotes(options);
SetNoteSize(options.largeNoteSize);
scrollVert = options.scrollVert;
showNoteLetters = options.showNoteLetters;
TimeSignature time = file.Time;
if (options.time != null)
{
time = options.time;
}
if (options.key == -1)
{
mainkey = GetKeySignature(tracks);
}
else
{
mainkey = new KeySignature(options.key);
}
numtracks = tracks.Count;
int lastStart = file.EndTime() + options.shifttime;
/* Create all the music symbols (notes, rests, vertical bars, and
* clef changes). The symbols variable contains a list of music
* symbols for each track. The list does not include the left-side
* Clef and key signature symbols. Those can only be calculated
* when we create the staffs.
*/
List <MusicSymbol>[] symbols = new List <MusicSymbol> [numtracks];
for (int tracknum = 0; tracknum < numtracks; tracknum++)
{
MidiTrack track = tracks[tracknum];
ClefMeasures clefs = new ClefMeasures(track.Notes, time.Measure);
List <ChordSymbol> chords = CreateChords(track.Notes, mainkey, time, clefs);
symbols[tracknum] = CreateSymbols(chords, clefs, time, lastStart);
}
List <LyricSymbol>[] lyrics = null;
if (options.showLyrics)
{
lyrics = GetLyrics(tracks);
}
/* Vertically align the music symbols */
SymbolWidths widths = new SymbolWidths(symbols, lyrics);
// SymbolWidths widths = new SymbolWidths(symbols);
AlignSymbols(symbols, widths);
staffs = CreateStaffs(symbols, mainkey, options, time.Measure);
CreateAllBeamedChords(symbols, time);
if (lyrics != null)
{
AddLyricsToStaffs(staffs, lyrics);
}
/* After making chord pairs, the stem directions can change,
* which affects the staff height. Re-calculate the staff height.
*/
foreach (Staff staff in staffs)
{
staff.CalculateHeight();
}
BackColor = Color.White;
SetZoom(1.0f);
}
/** Create a new SheetMusic control, using the given raw midi byte[] data.
* The options can be null.
*/
public SheetMusic(byte[] data, string title, MidiOptions options)
{
MidiFile file = new MidiFile(data, title);
init(file, options);
}
/** Create a new MidiPlayer, displaying the play/stop buttons, the
* speed bar, and volume bar. The midifile and sheetmusic are initially null.
*/
public MidiPlayer()
{
this.Font = new Font("Arial", 10, FontStyle.Bold);
loadButtonImages();
int buttonheight = this.Font.Height * 2;
this.midifile = null;
this.options = null;
this.sheet = null;
playstate = stopped;
startTime = DateTime.Now.TimeOfDay;
startPulseTime = 0;
currentPulseTime = 0;
prevPulseTime = -10;
errormsg = new StringBuilder(256);
ToolTip tip;
/* Create the rewind button */
rewindButton = new Button();
rewindButton.Parent = this;
rewindButton.Image = rewindImage;
rewindButton.ImageAlign = ContentAlignment.MiddleCenter;
rewindButton.Size = new Size(buttonheight, buttonheight);
rewindButton.Location = new Point(buttonheight / 2, buttonheight / 2);
rewindButton.Click += new EventHandler(Rewind);
tip = new ToolTip();
tip.SetToolTip(rewindButton, "Rewind");
/* Create the play button */
playButton = new Button();
playButton.Parent = this;
playButton.Image = playImage;
playButton.ImageAlign = ContentAlignment.MiddleCenter;
playButton.Size = new Size(buttonheight, buttonheight);
playButton.Location = new Point(buttonheight / 2, buttonheight / 2);
playButton.Location = new Point(rewindButton.Location.X + rewindButton.Width + buttonheight / 2,
rewindButton.Location.Y);
playButton.Click += new EventHandler(PlayPause);
playTip = new ToolTip();
playTip.SetToolTip(playButton, "Play");
/* Create the stop button */
stopButton = new Button();
stopButton.Parent = this;
stopButton.Image = stopImage;
stopButton.ImageAlign = ContentAlignment.MiddleCenter;
stopButton.Size = new Size(buttonheight, buttonheight);
stopButton.Location = new Point(playButton.Location.X + playButton.Width + buttonheight / 2,
playButton.Location.Y);
stopButton.Click += new EventHandler(Stop);
tip = new ToolTip();
tip.SetToolTip(stopButton, "Stop");
/* Create the fastFwd button */
fastFwdButton = new Button();
fastFwdButton.Parent = this;
fastFwdButton.Image = fastFwdImage;
fastFwdButton.ImageAlign = ContentAlignment.MiddleCenter;
fastFwdButton.Size = new Size(buttonheight, buttonheight);
fastFwdButton.Location = new Point(stopButton.Location.X + stopButton.Width + buttonheight / 2,
stopButton.Location.Y);
fastFwdButton.Click += new EventHandler(FastForward);
tip = new ToolTip();
tip.SetToolTip(fastFwdButton, "Fast Forward");
/* Create the Speed bar */
Label speedLabel = new Label();
speedLabel.Parent = this;
speedLabel.Text = "Speed: ";
speedLabel.TextAlign = ContentAlignment.MiddleRight;
speedLabel.Height = buttonheight;
speedLabel.Width = buttonheight * 2;
speedLabel.Location = new Point(fastFwdButton.Location.X + fastFwdButton.Width + buttonheight / 2,
fastFwdButton.Location.Y);
speedBar = new TrackBar();
speedBar.Parent = this;
speedBar.Minimum = 1;
speedBar.Maximum = 100;
speedBar.TickFrequency = 10;
speedBar.TickStyle = TickStyle.BottomRight;
speedBar.LargeChange = 10;
speedBar.Value = 100;
speedBar.Width = buttonheight * 5;
speedBar.Location = new Point(speedLabel.Location.X + speedLabel.Width + 2,
speedLabel.Location.Y);
tip = new ToolTip();
tip.SetToolTip(speedBar, "Adjust the speed");
/* Create the Volume bar */
Label volumeLabel = new Label();
volumeLabel.Parent = this;
volumeLabel.Image = volumeImage;
volumeLabel.ImageAlign = ContentAlignment.MiddleRight;
volumeLabel.Height = buttonheight;
volumeLabel.Width = buttonheight * 2;
volumeLabel.Location = new Point(speedBar.Location.X + speedBar.Width + buttonheight / 2,
speedBar.Location.Y);
volumeBar = new TrackBar();
volumeBar.Parent = this;
volumeBar.Minimum = 1;
volumeBar.Maximum = 100;
volumeBar.TickFrequency = 10;
volumeBar.TickStyle = TickStyle.BottomRight;
volumeBar.LargeChange = 10;
volumeBar.Value = 100;
volumeBar.Width = buttonheight * 5;
volumeBar.Location = new Point(volumeLabel.Location.X + volumeLabel.Width + 2,
volumeLabel.Location.Y);
volumeBar.Scroll += new EventHandler(ChangeVolume);
tip = new ToolTip();
tip.SetToolTip(volumeBar, "Adjust the volume");
Height = buttonheight * 2;
/* Initialize the timer used for playback, but don't start
* the timer yet (enabled = false).
*/
timer = new Timer();
timer.Enabled = false;
timer.Interval = 100; /* 100 millisec */
timer.Tick += new EventHandler(TimerCallback);
tempSoundFile = "";
}
