/* Create a new MIDI file (represented by this instance), including the header chunk and appropriate
* number of track chunks (with End of Track events). This does not set delta-time division.
*/
private MidiHeader Create(int format, int numberOfTracks)
{
/* Make sure we start with a clean slate. */
this.Clear();
int n = MidiChunkInfo.SizeItem();
this.Bytes = new byte[n + MidiHeader.SizeItem()];
/* Start the header chunk. */
MidiChunkInfo chunkInfo = this.CreateChunkInfo(0, MidiChunkInfo.HeaderType);
this.Items.Add(chunkInfo);
/* Finish the header chunk. (Don't set NumberOfTracks here; AddTrack will set it.) */
MidiHeader header = new MidiHeader(this, n);
header.Format = format;
this.Items.Add(header);
/* Add each track chunk (with an End of Track meta-event). */
for (int i = 0; i < numberOfTracks; ++i)
{
this.AddTrack();
this.AddMetaEvent(0, MidiMetaEvent.EndOfTrackType, null);
}
/* Delta-time division still needs to be set. */
return(header);
}
private MidiChunkInfo CreateChunkInfo(int offset, string type)
{
MidiChunkInfo chunkInfo = new MidiChunkInfo(this, offset);
chunkInfo.Type = type;
chunkInfo.Length = (type == MidiChunkInfo.HeaderType) ? MidiHeader.SizeItem() : 0;
if (type == MidiChunkInfo.TrackType)
{
++this.Header.NumberOfTracks;
}
return(chunkInfo);
}
/// <summary>Loads an existing MIDI file from disk (into this instance).</summary>
/// <param name="path">The path of the MIDI file to load.</param>
public void Load(string path)
{
int n, i, j = 0;
MidiChunkInfo chunkInfo;
MidiHeader header = null;
/* Make sure we start with a clean slate. */
this.Clear();
this.Bytes = File.ReadAllBytes(path);
/* Process each MidiItem object from the byte array. */
for (i = 0; i < this.Bytes.Length; i += chunkInfo.Length)
{
/* A chunk should begin here. */
chunkInfo = new MidiChunkInfo(this, i);
this.Items.Add(chunkInfo);
i += MidiChunkInfo.SizeItem();
/* What comes next depends on the chunk type. */
switch (chunkInfo.Type)
{
case MidiChunkInfo.HeaderType:
if (header == null)
{
header = new MidiHeader(this, i);
this.Items.Add(header);
}
else
{
this.AddErrorText(Properties.Resources.MultipleHeaders, 0);
}
break;
case MidiChunkInfo.TrackType: this.ParseEvents(i, chunkInfo.Length, ++j); break;
}
}
/* Check for track number mismatch. */
n = (header == null) ? 0 : header.NumberOfTracks;
if (n != j)
{
string s = UI.ParseLabel(Properties.Resources.Track).ToLower();
s = string.Format(Properties.Resources.MismatchFormat, s, n, j);
this.AddErrorText(s, 0);
}
}
/// <summary>Initializes a new instance of the MidiHeaderDialog class.</summary>
/// <param name="header">
/// MidiHeader object representing the MIDI header (MThd) chunk to edit, or null to create a new one.
/// </param>
public MidiHeaderDialog(MidiHeader header)
: base(header)
{
Label label;
int i = 0, j;
MarginType marginType;
/* If a new (file) header is being created, prompt for a file name. */
if (this.ForNewItem)
{
/* Initialize the "File name" label. */
label = UI.CreateLabel(MarginType.Top, Properties.Resources.FileName, true);
this.AddUIElement(label);
/* Initialize the "File name" text box. */
this.FileNameTextBox = new TextBox();
this.FileNameTextBox.TabIndex = ++i;
this.FileNameTextBox.Margin = new Thickness(0, 0, UI.HalfSpace, 0);
this.FileNameTextBox.GotFocus += UI.TextBox_GotFocus;
this.FileNameTextBox.TextChanged += this.FileNameTextBox_TextChanged;
label.Target = this.FileNameTextBox;
this.InitialElement = this.FileNameTextBox;
/* Initialize the browse button. */
Button button = new Button();
button.TabIndex = ++i;
button.Margin = new Thickness(UI.HalfSpace, 0, 0, 0);
button.Content = " ... ";
button.Click += this.BrowseButton_Click;
/* Build out a dock panel to contain the file name text box and browse button. */
DockPanel.SetDock(button, Dock.Right);
DockPanel dockPanel = new DockPanel();
dockPanel.Children.Add(button);
dockPanel.Children.Add(this.FileNameTextBox);
dockPanel.Margin = new Thickness(UI.TripleSpace, UI.HalfSpace, UI.TripleSpace, UI.UnitSpace);
this.AddUIElement(dockPanel);
/* Set the margin type for the next label. */
marginType = MarginType.Standard;
}
else
{
marginType = MarginType.Top;
}
/* Initialize the "Format" label. */
label = UI.CreateLabel(marginType, Properties.Resources.Format, true);
/* Initialize the "Format" combo box. */
this.FormatComboBox = new ComboBox();
this.FormatComboBox.TabIndex = ++i;
this.FormatComboBox.Margin = new Thickness(UI.TripleSpace, UI.HalfSpace, UI.TripleSpace, UI.UnitSpace);
this.FormatComboBox.Items.Add(Properties.Resources.Format0);
this.FormatComboBox.Items.Add(Properties.Resources.Format1);
this.FormatComboBox.Items.Add(Properties.Resources.Format2);
this.FormatComboBox.SelectionChanged += this.FormatComboBox_SelectionChanged;
label.Target = this.FormatComboBox;
/* Initialize the "Number of tracks" label. */
this.NumberOfTracksLabel = UI.CreateLabel(MarginType.Standard, Properties.Resources.NumberOfTracks, true);
/* Initialize the "Number of tracks" text box. */
this.NumberOfTracksTextBox = new TextBox();
this.NumberOfTracksTextBox.TabIndex = ++i;
this.NumberOfTracksTextBox.Margin = new Thickness(UI.TripleSpace, UI.HalfSpace, UI.TripleSpace, UI.UnitSpace);
this.NumberOfTracksTextBox.TextAlignment = TextAlignment.Right;
this.NumberOfTracksTextBox.GotFocus += UI.TextBox_GotFocus;
this.NumberOfTracksTextBox.TextChanged += this.NumberOfTracksTextBox_TextChanged;
this.NumberOfTracksLabel.Target = this.NumberOfTracksTextBox;
/* Initialize the "Metrical time" radio button. */
this.MetricalTimeRadioButton = new RadioButton();
this.MetricalTimeRadioButton.TabIndex = ++i;
this.MetricalTimeRadioButton.Margin = new Thickness(UI.TripleSpace, UI.TripleSpace, UI.TripleSpace, UI.UnitSpace);
this.MetricalTimeRadioButton.Content = Properties.Resources.MetricalTime;
this.MetricalTimeRadioButton.Checked += this.MetricalTimeRadioButton_Checked;
/* Initialize the "Ticks per quarter note" label. */
this.TicksPerQuarterNoteLabel = UI.CreateLabel(MarginType.Indent, Properties.Resources.TicksPerQuarterNote, true);
this.TicksPerQuarterNoteLabel.IsEnabled = false;
/* Initialize the "Ticks per quarter note" text box. */
this.TicksPerQuarterNoteTextBox = new TextBox();
this.TicksPerQuarterNoteTextBox.TabIndex = ++i;
this.TicksPerQuarterNoteTextBox.Margin = new Thickness(UI.IndentSpace, UI.HalfSpace, UI.TripleSpace, UI.UnitSpace);
this.TicksPerQuarterNoteTextBox.TextAlignment = TextAlignment.Right;
this.TicksPerQuarterNoteTextBox.IsEnabled = false;
this.TicksPerQuarterNoteTextBox.GotFocus += UI.TextBox_GotFocus;
this.TicksPerQuarterNoteTextBox.TextChanged += this.TicksPerQuarterNoteTextBox_TextChanged;
this.TicksPerQuarterNoteLabel.Target = this.TicksPerQuarterNoteTextBox;
/* Initialize the "Time-code-based time" radio button. */
this.TimeCodeBasedTimeRadioButton = new RadioButton();
this.TimeCodeBasedTimeRadioButton.TabIndex = ++i;
this.TimeCodeBasedTimeRadioButton.Margin =
new Thickness(UI.TripleSpace, UI.DoubleSpace, UI.TripleSpace, UI.UnitSpace);
this.TimeCodeBasedTimeRadioButton.Content = Properties.Resources.TimeCodeBasedTime;
this.TimeCodeBasedTimeRadioButton.Checked += this.TimeCodeBasedTimeRadioButton_Checked;
/* Initialize the "Frames per second" label. */
this.FramesPerSecondLabel = UI.CreateLabel(MarginType.Indent, Properties.Resources.FramesPerSecond, true);
this.FramesPerSecondLabel.IsEnabled = false;
/* Initialize the "Frames per second" combo box. */
this.FramesPerSecondComboBox = new ComboBox();
this.FramesPerSecondComboBox.TabIndex = ++i;
this.FramesPerSecondComboBox.Margin = new Thickness(UI.IndentSpace, UI.HalfSpace, UI.TripleSpace, UI.UnitSpace);
for (j = 0; j < MidiHeaderDialog.FramesPerSecondCount; ++j)
{
this.FramesPerSecondComboBox.Items.Add(MidiHeaderDialog.FramesPerSecondStrings[j]);
}
this.FramesPerSecondComboBox.IsEnabled = false;
this.FramesPerSecondComboBox.SelectionChanged += this.FramesPerSecondComboBox_SelectionChanged;
this.FramesPerSecondLabel.Target = this.FramesPerSecondComboBox;
/* Initialize the "Ticks per frame" label. */
this.TicksPerFrameLabel = UI.CreateLabel(MarginType.Indent, Properties.Resources.TicksPerFrame, true);
this.TicksPerFrameLabel.IsEnabled = false;
/* Initialize the "Ticks per frame" text box. */
this.TicksPerFrameTextBox = new TextBox();
this.TicksPerFrameTextBox.TabIndex = ++i;
this.TicksPerFrameTextBox.Margin = new Thickness(UI.IndentSpace, UI.HalfSpace, UI.TripleSpace, UI.TripleSpace);
this.TicksPerFrameTextBox.TextAlignment = TextAlignment.Right;
this.TicksPerFrameTextBox.IsEnabled = false;
this.TicksPerFrameTextBox.GotFocus += UI.TextBox_GotFocus;
this.TicksPerFrameTextBox.TextChanged += this.TicksPerFrameTextBox_TextChanged;
this.TicksPerFrameLabel.Target = this.TicksPerFrameTextBox;
/* Build out the stack panel, which will serve as the content for the "Delta-time division" group box. */
StackPanel stackPanel = new StackPanel();
stackPanel.Children.Add(this.MetricalTimeRadioButton);
stackPanel.Children.Add(this.TicksPerQuarterNoteLabel);
stackPanel.Children.Add(this.TicksPerQuarterNoteTextBox);
stackPanel.Children.Add(this.TimeCodeBasedTimeRadioButton);
stackPanel.Children.Add(this.FramesPerSecondLabel);
stackPanel.Children.Add(this.FramesPerSecondComboBox);
stackPanel.Children.Add(this.TicksPerFrameLabel);
stackPanel.Children.Add(this.TicksPerFrameTextBox);
/* Build out the "Delta-time division" group box. */
GroupBox groupBox = new GroupBox();
groupBox.Header = Properties.Resources.DeltaTimeDivision;
groupBox.Content = stackPanel;
groupBox.Margin = new Thickness(UI.TripleSpace, UI.UnitSpace, UI.TripleSpace, UI.UnitSpace);
/* Build out the window and its content. */
this.AddUIElement(label);
this.AddUIElement(this.FormatComboBox);
this.AddUIElement(this.NumberOfTracksLabel);
this.AddUIElement(this.NumberOfTracksTextBox);
this.AddUIElement(groupBox);
this.BuildOut(UI.ClientWidth, MidiHeaderDialog.TitleString);
/* The OK button should start out disabled and stay that way until all required input is entered. */
this.OkButton.IsEnabled = false;
/* If a MidiHeader object was supplied, use it to set initial values. */
if (this.ForNewItem)
{
return;
}
this.InitialElement = this.FormatComboBox;
this.NumberOfTracksTextBox.IsEnabled = false;
this.NumberOfTracksLabel.IsEnabled = false;
this.NumberOfTracksTextBox.Text = header.NumberOfTracks.ToString();
this.FormatComboBox.SelectedIndex = header.Format;
if (header.TicksPerQuarterNote < 0)
{
this.TimeCodeBasedTimeRadioButton.IsChecked = true;
for (j = 0; j < MidiHeaderDialog.FramesPerSecondCount; ++j)
{
if (MidiHeaderDialog.FramesPerSecondValues[j] == header.FramesPerSecond)
{
this.FramesPerSecondComboBox.SelectedIndex = j; break;
}
}
this.TicksPerFrameTextBox.Text = header.TicksPerFrame.ToString();
}
else
{
this.MetricalTimeRadioButton.IsChecked = true;
this.TicksPerQuarterNoteTextBox.Text = header.TicksPerQuarterNote.ToString();
}
}
