/// <summary>
/// Takes part of the specified length of a MIDI file (starting at the beginning of the file)
/// and returns it as an instance of <see cref="MidiFile"/>.
/// </summary>
/// <param name="midiFile"><see cref="MidiFile"/> to take part of.</param>
/// <param name="partLength">The length of part to take.</param>
/// <param name="settings">Settings according to which <paramref name="midiFile"/>
/// should be splitted.</param>
/// <returns><see cref="MidiFile"/> which is part of the <paramref name="midiFile"/>.</returns>
/// <exception cref="ArgumentNullException">
/// <para>One of the following errors occured:</para>
/// <list type="bullet">
/// <item>
/// <description><paramref name="midiFile"/> is <c>null</c>.</description>
/// </item>
/// <item>
/// <description><paramref name="partLength"/> is <c>null</c>.</description>
/// </item>
/// </list>
/// </exception>
public static MidiFile TakePart(this MidiFile midiFile, ITimeSpan partLength, SliceMidiFileSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
ThrowIfArgument.IsNull(nameof(partLength), partLength);
var grid = new ArbitraryGrid(partLength);
settings = settings ?? new SliceMidiFileSettings();
midiFile = PrepareMidiFileForSlicing(midiFile, grid, settings);
var tempoMap = midiFile.GetTempoMap();
var time = grid.GetTimes(tempoMap).First();
using (var slicer = MidiFileSlicer.CreateFromFile(midiFile))
{
return(slicer.GetNextSlice(time, settings));
}
}
/// <summary>
/// Splits <see cref="MidiFile"/> by the specified grid.
/// </summary>
/// <remarks>
/// Non-track chunks will not be copied to any of the new files.
/// </remarks>
/// <param name="midiFile"><see cref="MidiFile"/> to split.</param>
/// <param name="grid">Grid to split <paramref name="midiFile"/> by.</param>
/// <param name="settings">Settings according to which file should be splitted.</param>
/// <returns>Collection of <see cref="MidiFile"/> produced during splitting the input file by grid.</returns>
/// <exception cref="ArgumentNullException">
/// <para>One of the following errors occured:</para>
/// <list type="bullet">
/// <item>
/// <description><paramref name="midiFile"/> is <c>null</c>.</description>
/// </item>
/// <item>
/// <description><paramref name="grid"/> is <c>null</c>.</description>
/// </item>
/// </list>
/// </exception>
public static IEnumerable <MidiFile> SplitByGrid(this MidiFile midiFile, IGrid grid, SliceMidiFileSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
ThrowIfArgument.IsNull(nameof(grid), grid);
if (!midiFile.GetEvents().Any())
{
yield break;
}
settings = settings ?? new SliceMidiFileSettings();
midiFile = PrepareMidiFileForSlicing(midiFile, grid, settings);
var tempoMap = midiFile.GetTempoMap();
using (var slicer = MidiFileSlicer.CreateFromFile(midiFile))
{
foreach (var time in grid.GetTimes(tempoMap))
{
if (time == 0)
{
continue;
}
yield return(slicer.GetNextSlice(time, settings));
if (slicer.AllEventsProcessed)
{
break;
}
}
if (!slicer.AllEventsProcessed)
{
yield return(slicer.GetNextSlice(long.MaxValue, settings));
}
}
}
