public MidiFile(string path)
{
FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read);
try {
// ヘッダ
byte[] byte4 = new byte[4];
stream.Read(byte4, 0, 4);
if (PortUtil.make_uint32_be(byte4) != 0x4d546864)
{
throw new Exception("header error: MThd");
}
// データ長
stream.Read(byte4, 0, 4);
long length = PortUtil.make_uint32_be(byte4);
// フォーマット
stream.Read(byte4, 0, 2);
m_format = PortUtil.make_uint16_be(byte4);
// トラック数
int tracks = 0;
stream.Read(byte4, 0, 2);
tracks = (int)PortUtil.make_uint16_be(byte4);
// 時間分解能
stream.Read(byte4, 0, 2);
m_time_format = PortUtil.make_uint16_be(byte4);
// 各トラックを読込み
m_events = new List <List <MidiEvent> >();
for (int track = 0; track < tracks; track++)
{
List <MidiEvent> track_events = new List <MidiEvent>();
// ヘッダー
stream.Read(byte4, 0, 4);
if (PortUtil.make_uint32_be(byte4) != 0x4d54726b)
{
throw new Exception("header error; MTrk");
}
// チャンクサイズ
stream.Read(byte4, 0, 4);
long size = (long)PortUtil.make_uint32_be(byte4);
long startpos = stream.Position;
// チャンクの終わりまで読込み
ByRef <long> clock = new ByRef <long>((long)0);
ByRef <int> last_status_byte = new ByRef <int>(0x00);
while (stream.Position < startpos + size)
{
MidiEvent mi = MidiEvent.read(stream, clock, last_status_byte);
track_events.Add(mi);
}
if (m_time_format != 480)
{
int count = track_events.Count;
for (int i = 0; i < count; i++)
{
MidiEvent mi = track_events[i];
mi.clock = mi.clock * 480 / m_time_format;
track_events[i] = mi;
}
}
m_events.Add(track_events);
}
m_time_format = 480;
#if DEBUG && MIDI_PRINT_TO_FILE
string dbg = Path.Combine(PortUtil.getDirectoryName(path), PortUtil.getFileNameWithoutExtension(path) + ".txt");
StreamWriter sw = null;
try {
sw = new StreamWriter(dbg);
const string format = " {0,8} 0x{1:X4} {2,-35} 0x{3:X2} 0x{4:X2}";
const string format0 = " {0,8} 0x{1:X4} {2,-35} 0x{3:X2}";
for (int track = 1; track < m_events.Count; track++)
{
sw.WriteLine("MidiFile..ctor; track=" + track);
byte msb, lsb, data_msb, data_lsb;
msb = lsb = data_msb = data_lsb = 0x0;
for (int i = 0; i < m_events[track].Count; i++)
{
if (m_events[track][i].firstByte == 0xb0)
{
switch (m_events[track][i].data[0])
{
case 0x63:
msb = (byte)(0xff & m_events[track][i].data[1]);
lsb = 0x0;
break;
case 0x62:
lsb = (byte)(0xff & m_events[track][i].data[1]);
break;
case 0x06:
data_msb = (byte)(0xff & m_events[track][i].data[1]);
ushort nrpn = (ushort)(msb << 8 | lsb);
string name = NRPN.getName(nrpn);
if (name.Equals(""))
{
name = "* * UNKNOWN * *";
sw.WriteLine(string.Format(format0, m_events[track][i].clock, nrpn, name, data_msb));
}
else
{
//if ( !NRPN.is_require_data_lsb( nrpn ) ) {
sw.WriteLine(string.Format(format0, m_events[track][i].clock, nrpn, name, data_msb));
//}
}
break;
case 0x26:
data_lsb = (byte)(0xff & m_events[track][i].data[1]);
ushort nrpn2 = (ushort)(msb << 8 | lsb);
string name2 = NRPN.getName(nrpn2);
if (name2.Equals(""))
{
name2 = "* * UNKNOWN * *";
}
sw.WriteLine(string.Format(format, m_events[track][i].clock, nrpn2, name2, data_msb, data_lsb));
break;
}
}
}
}
} catch (Exception ex) {
} finally {
if (sw != null)
{
try {
sw.Close();
} catch (Exception ex2) {
}
}
}
#endif
} catch (Exception ex) {
serr.println("MidiFile#.ctor; ex=" + ex);
} finally {
if (stream != null)
{
try {
stream.Close();
} catch (Exception ex2) {
serr.println("MidiFile#.ctor; ex2=" + ex2);
}
}
}
}