public MidiTrack(int id, BufferByteReader reader, MidiFile file, RenderSettings settings)
{
this.settings = settings;
globalDisplayNotes = file.globalDisplayNotes;
globalTempoEvents = file.globalTempoEvents;
globalColorEvents = file.globalColorEvents;
globalPlaybackEvents = file.globalPlaybackEvents;
midi = file;
this.reader = reader;
trackID = id;
ResetColors();
zeroTickTrkColors = new NoteColor[16];
for (int i = 0; i < 16; i++)
{
zeroTickTrkColors[i] = null;
}
}
public void LoadAndParseAll(bool useBufferStream = false)
{
long[] tracklens = new long[tracks.Length];
int p = 0;
List <FastList <Tempo> > tempos = new List <FastList <Tempo> >();
Parallel.For(0, tracks.Length, (i) =>
{
var reader = new BufferByteReader(MidiFileReader, settings.maxTrackBufferSize, trackBeginnings[i], trackLengths[i]);
tracks[i] = new MidiTrack(i, reader, this, settings);
var t = tracks[i];
while (!t.trackEnded)
{
try
{
t.ParseNextEventFast();
}
catch
{
break;
}
}
noteCount += t.noteCount;
tracklens[i] = t.trackTime;
if (t.foundTimeSig != null)
{
info.timeSig = t.foundTimeSig;
}
if (t.zerothTempo != -1)
{
zerothTempo = t.zerothTempo;
}
lock (tempos) tempos.Add(t.TempoEvents);
t.Reset();
Console.WriteLine("Loaded track " + p++ + "/" + tracks.Length);
GC.Collect();
});
maxTrackTime = tracklens.Max();
Console.WriteLine("Processing Tempos");
LinkedList <Tempo> Tempos = new LinkedList <Tempo>();
var iters = tempos.Select(t => t.GetEnumerator()).ToArray();
bool[] unended = new bool[iters.Length];
for (int i = 0; i < iters.Length; i++)
{
unended[i] = iters[i].MoveNext();
}
while (true)
{
long smallest = 0;
bool first = true;
int id = 0;
for (int i = 0; i < iters.Length; i++)
{
if (!unended[i])
{
continue;
}
if (first)
{
smallest = iters[i].Current.pos;
id = i;
first = false;
continue;
}
if (iters[i].Current.pos < smallest)
{
smallest = iters[i].Current.pos;
id = i;
}
}
if (first)
{
break;
}
Tempos.AddLast(iters[id].Current);
unended[id] = iters[id].MoveNext();
}
double time = 0;
long ticks = maxTrackTime;
double multiplier = ((double)500000 / division) / 1000000;
long lastt = 0;
foreach (var t in Tempos)
{
var offset = t.pos - lastt;
time += offset * multiplier;
ticks -= offset;
lastt = t.pos;
multiplier = ((double)t.tempo / division) / 1000000;
}
time += ticks * multiplier;
info.secondsLength = time;
maxTrackTime = tracklens.Max();
unendedTracks = trackcount;
}
