private void BrowseBTN_Click(object sender, EventArgs e)
{
if (OpenMIDIDialog.ShowDialog() == DialogResult.OK)
{
using (FileStream midiReader = new FileStream(OpenMIDIDialog.FileName, FileMode.Open))
{
midiReader.Seek(4, SeekOrigin.Begin);
byte[] headerLength = new byte[4];
midiReader.Read(headerLength, 0, headerLength.Length);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(headerLength);
}
int headerLengthInt = BitConverter.ToInt32(headerLength, 0);
if (headerLengthInt != 6)
{
MessageBox.Show(this, "Error: " + Path.GetFileName(OpenMIDIDialog.FileName) + " is not a MIDI file created under the MIDI 1.0 specification, and won't be opened for reading.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
MIDIFileBox.Text = OpenMIDIDialog.FileName;
}
}
}
}
private void BrowseBTN_Click(object sender, EventArgs e)
{
if (OpenMIDIDialog.ShowDialog() == DialogResult.OK)
{
using (FileStream midiReader = new FileStream(OpenMIDIDialog.FileName, FileMode.Open))
{
midiReader.Seek(4, SeekOrigin.Begin);
byte[] headerSize = new byte[4];
midiReader.Read(headerSize, 0, headerSize.Length);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(headerSize);
}
int headerSizeInt = BitConverter.ToInt32(headerSize, 0);
byte[] midiFormat = new byte[2];
midiReader.Read(midiFormat, 0, midiFormat.Length);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(midiFormat);
}
ushort formatNum = BitConverter.ToUInt16(midiFormat, 0);
if (headerSizeInt != 6)
{
MessageBox.Show(this, Path.GetFileName(OpenMIDIDialog.FileName) + " is not a MIDI file created under the MIDI 1.0 specification, and won't be opened for splitting.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else if (formatNum != 1)
{
MessageBox.Show(this, Path.GetFileName(OpenMIDIDialog.FileName) + " is not a Format 1 MIDI file, and won't be opened for splitting.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
MIDIListView.Items.Clear();
MIDIPathBox.Text = OpenMIDIDialog.FileName;
byte[] totalTracks = new byte[2];
midiReader.Read(totalTracks, 0, totalTracks.Length);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(totalTracks);
}
ushort totalTracksShort = BitConverter.ToUInt16(totalTracks, 0);
midiReader.Seek(2, SeekOrigin.Current);
if (Settings.Default.ReadTrackNames)
{
for (ushort i = 0; i < totalTracksShort; i++)
{
midiReader.Seek(4, SeekOrigin.Current);
byte[] trackSize = new byte[4];
midiReader.Read(trackSize, 0, trackSize.Length);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(trackSize);
}
int trackSizeInt = BitConverter.ToInt32(trackSize, 0);
List <byte> tempArray = new List <byte>();
if (trackSizeInt <= 4096)
{
byte[] trackNameData = new byte[trackSizeInt];
midiReader.Read(trackNameData, 0, trackNameData.Length);
tempArray.AddRange(trackNameData);
}
else // To help speed up search time, read only the first 4096 bytes of data in larger track sizes (the track name is usually located within the first 4096 bytes of data).
{
byte[] trackNameData = new byte[4096];
midiReader.Read(trackNameData, 0, trackNameData.Length);
midiReader.Seek(trackSizeInt - 4096, SeekOrigin.Current);
tempArray.AddRange(trackNameData);
}
byte[] trackData = tempArray.ToArray();
byte[] searchPattern = { 0xFF, 0x03 };
List <int> trackNameIndex = new List <int>();
trackNameIndex = KMPSearch(trackData, searchPattern);
string trackNameStr;
if (trackNameIndex.Count > 0)
{
int lengthIndex = trackNameIndex.ElementAt(trackNameIndex.Count - 1) + 2;
byte trackNameByteLength = trackData[lengthIndex];
byte[] trackNameBytes = new byte[(int)trackNameByteLength];
trackNameBytes = SubArray(trackData, lengthIndex + 1, (int)trackNameByteLength);
trackNameStr = Encoding.UTF8.GetString(trackNameBytes);
}
else
{
trackNameStr = "Track " + (i + 1).ToString();
}
string[] newRow = { (i + 1).ToString(), trackNameStr, trackSizeInt.ToString() };
ListViewItem newItem = new ListViewItem(newRow);
MIDIListView.Items.Add(newItem);
}
}
else
{
for (ushort i = 0; i < totalTracksShort; i++)
{
midiReader.Seek(4, SeekOrigin.Current);
byte[] trackSize = new byte[4];
midiReader.Read(trackSize, 0, trackSize.Length);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(trackSize);
}
int trackSizeInt = BitConverter.ToInt32(trackSize, 0);
midiReader.Seek(trackSizeInt, SeekOrigin.Current);
string trackNameStr = "Track " + (i + 1).ToString();
string[] newRow = { (i + 1).ToString(), trackNameStr, trackSizeInt.ToString() };
ListViewItem newItem = new ListViewItem(newRow);
MIDIListView.Items.Add(newItem);
}
}
}
}
}
}
