private void btnOK_Click(object sender, EventArgs e) {
try {
// Update settings from controls
TrackCount = txtTracks.Text.ToInt(2, "Track count");
float m = 0;
if(!txtMinTrackLength.Text.TimeSpanToSeconds(ref m))
throw new ApplicationException("Invalid min track length");
Properties.Settings.Default.MinTrackLength = m;
Properties.Settings.Default.SilenceFilterCentre = txtCentre.Text.ToFloat("Centre Frequency");
Properties.Settings.Default.SilenceFilterQ = txtQ.Text.ToFloat("Filter width (Q)");
Properties.Settings.Default.StartSilenceThreshold = txtStartSilence.Text.ToFloat("Start silence threshold");
Properties.Settings.Default.EndSilenceThreshold = txtEndSilence.Text.ToFloat("Start Music threshold");
Properties.Settings.Default.Save();
btnOK.Enabled = false; // Disable OK until finished
m_Task.Run(delegate(TaskRunner.Task t) {
Progress("Finding silences between tracks", 0);
// Get list of potential gaps
float length = m_Reader.WaveFormat.BytesToSeconds(m_Reader.Length); // Length of file in secs
List<GapInfo> gaps = new List<GapInfo>(); // Found silences
GapFinder f = new GapFinder(m_Reader);
float start = 0; // Start of track
Program.Trace("Album length {0}", length.ToTimeSpanString());
while (!t.Stop && f.FindMusic(start, -1)) {
// Found some music - add info about the gap
gaps.Add(new GapInfo() {
Start = start,
End = f.Position,
AverageVolume = f.AverageVolume
});
string status = "Track " + gaps.Count + " at " + f.Position.ToTimeSpanString();
Program.Trace(status);
Progress(status, (int)(100 * f.Position / length));
if (f.FindSilence(f.Position, -1)) {
// Found a silence
while (!t.Stop && f.Position - start < Properties.Settings.Default.MinTrackLength) {
// Track is too small - find music, then another silence
Progress(status, (int)(100 * f.Position / length));
if (!f.FindMusic(f.Position, -1))
break;
Progress(status, (int)(100 * f.Position / length));
if (!f.FindSilence(f.Position, -1))
break;
}
Program.Trace("Track " + gaps.Count + " ends at " + f.Position.ToTimeSpanString());
start = f.Position;
} else {
Program.Trace("Album ends at " + f.Position.ToTimeSpanString());
break;
}
Progress("Track " + gaps.Count + " ends at " + f.Position.ToTimeSpanString(), (int)(100 * f.Position / length));
}
// And the gap at the end
gaps.Add(new GapInfo() {
Start = start,
End = length,
AverageVolume = f.AverageVolume
});
if (!t.Stop) {
if (gaps.Count < TrackCount + 1) {
Despatch(delegate() {
lblStatus.Text = "Only " + (gaps.Count - 1) + " Tracks found";
Refresh();
});
} else {
// Eliminate loudest gaps (but not first or last)
while (gaps.Count > TrackCount + 1) {
float vol = float.MinValue;
int loudest = 0;
for (int i = 1; i < gaps.Count - 2; i++) {
if (gaps[i].AverageVolume > vol) {
vol = gaps[i].AverageVolume;
loudest = i;
}
}
gaps.RemoveAt(loudest);
}
}
}
if (!t.Stop) {
// Now create/update track information
Tracks = new List<Track>();
for (int i = 1; i < gaps.Count; i++) {
GapInfo last = gaps[i - 1];
// Copy existing track, or create new one
Track trk = Program.Album != null && i <= Program.Album.Tracks.Count ?
new Track(Program.Album.Tracks[i - 1]) : new Track();
trk.Gap = last.End - last.Start;
trk.LengthSeconds = gaps[i].Start - last.End;
Tracks.Add(trk);
}
}
if (!t.Stop) {
// Have finished = close dialog with OK
Despatch(delegate() {
btnOK.Enabled = true;
DialogResult = System.Windows.Forms.DialogResult.OK;
Close();
});
}
});
} catch(Exception ex) {
lblStatus.Text = ex.Message;
}
}
/// <summary>
/// Adjust track starts to coincide with actual start of music.
/// Can call from any thread.
/// </summary>
private void autoGap() {
Status("Checking track gaps");
GapFinder f = new GapFinder(m_Reader);
float end = 0; // Silence at end of previous track (or start of recording, at first)
foreach (Track t in Program.Album.Tracks) {
float start;
if (f.FindMusic(end, 60)) {
// Set track start to start of music
start = f.Position;
// Set track gap to length of silence
t.Gap = start - end;
} else {
// No music found in first 60 secs - just default to gap provided
start = end + t.Gap;
}
end = start + t.LengthSeconds; // Where track end should be, according to Program.Album.Tracks
// Is there silence shortly after the end of the track?
if(f.FindSilence(end, 60)
// If not, go back 30 seconds (or less, subject to MinTrackLength), and look again
|| f.FindSilence(Math.Max(start + Properties.Settings.Default.MinTrackLength, end - 30), 30)) {
// Found silence - set correct track end, and length
end = f.Position;
t.LengthSeconds = end - start;
}
}
}
