private static IEnumerable <TrackChunk> ConvertTrackChunks(IEnumerable <TrackChunk> trackChunks, MidiFileFormat format)
{
var chunksConverter = ChunksConverterFactory.GetConverter(format);
return(chunksConverter.Convert(trackChunks)
.OfType <TrackChunk>());
}
/// <summary>
/// Writes current <see cref="MidiFile"/> to the stream.
/// </summary>
/// <param name="stream">Stream to write file's data to.</param>
/// <param name="format">Format of the file to be written.</param>
/// <param name="settings">Settings according to which the file must be written. Specify <c>null</c> to use
/// default settings.</param>
/// <exception cref="ArgumentNullException"><paramref name="stream"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException"><paramref name="stream"/> doesn't support writing.</exception>
/// <exception cref="InvalidEnumArgumentException"><paramref name="format"/> specified an invalid value.</exception>
/// <exception cref="InvalidOperationException">Time division is <c>null</c>.</exception>
/// <exception cref="IOException">An I/O error occurred while writing to the stream.</exception>
/// <exception cref="ObjectDisposedException"><paramref name="stream"/> is disposed.</exception>
/// <exception cref="TooManyTrackChunksException">Count of track chunks presented in the file
/// exceeds maximum value allowed for MIDI file.</exception>
public void Write(Stream stream, MidiFileFormat format = MidiFileFormat.MultiTrack, WritingSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(stream), stream);
ThrowIfArgument.IsInvalidEnumValue(nameof(format), format);
if (TimeDivision == null)
{
throw new InvalidOperationException("Time division is null.");
}
if (!stream.CanWrite)
{
throw new ArgumentException("Stream doesn't support writing.", nameof(stream));
}
//
if (settings == null)
{
settings = new WritingSettings();
}
if (settings.WriterSettings == null)
{
settings.WriterSettings = new WriterSettings();
}
using (var writer = new MidiWriter(stream, settings.WriterSettings))
{
var chunksConverter = ChunksConverterFactory.GetConverter(format);
var chunks = chunksConverter.Convert(Chunks);
if (settings.WriteHeaderChunk)
{
var trackChunksCount = chunks.Count(c => c is TrackChunk);
if (trackChunksCount > ushort.MaxValue)
{
throw new TooManyTrackChunksException(trackChunksCount);
}
var headerChunk = new HeaderChunk
{
FileFormat = (ushort)format,
TimeDivision = TimeDivision,
TracksNumber = (ushort)trackChunksCount
};
headerChunk.Write(writer, settings);
}
foreach (var chunk in chunks)
{
if (chunk is UnknownChunk && settings.DeleteUnknownChunks)
{
continue;
}
chunk.Write(writer, settings);
}
}
}
/// <summary>
/// Writes current <see cref="MidiFile"/> to the stream.
/// </summary>
/// <param name="stream">Stream to write file's data to.</param>
/// <param name="format">Format of the file to be written.</param>
/// <param name="settings">Settings according to which the file must be written.</param>
/// <exception cref="ArgumentNullException"><paramref name="stream"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="stream"/> doesn't support writing.</exception>
/// <exception cref="InvalidEnumArgumentException"><paramref name="format"/> specified an invalid value.</exception>
/// <exception cref="InvalidOperationException">Time division is null.</exception>
/// <exception cref="IOException">An I/O error occurred while writing to the stream.</exception>
/// <exception cref="ObjectDisposedException"><paramref name="stream"/> is disposed. -or-
/// Underlying stream writer is disposed.</exception>
/// <exception cref="TooManyTrackChunksException">Count of track chunks presented in the file
/// exceeds maximum value allowed for MIDI file.</exception>
public void Write(Stream stream, MidiFileFormat format = MidiFileFormat.MultiTrack, WritingSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(stream), stream);
ThrowIfArgument.IsInvalidEnumValue(nameof(format), format);
if (TimeDivision == null)
{
throw new InvalidOperationException("Time division is null.");
}
if (!stream.CanWrite)
{
throw new ArgumentException("Stream doesn't support writing.", nameof(stream));
}
//
if (settings == null)
{
settings = new WritingSettings();
}
ValidateCustomMetaEventsStatusBytes(settings.CustomMetaEventTypes);
ValidateCustomChunksIds(Chunks.Where(c => !(c is TrackChunk) && !(c is HeaderChunk)));
using (var writer = new MidiWriter(stream))
{
var chunksConverter = ChunksConverterFactory.GetConverter(format);
var chunks = chunksConverter.Convert(Chunks);
var trackChunksCount = chunks.Count(c => c is TrackChunk);
if (trackChunksCount > ushort.MaxValue)
{
throw new TooManyTrackChunksException(
$"Count of track chunks to be written ({trackChunksCount}) is greater than the valid maximum ({ushort.MaxValue}).",
trackChunksCount);
}
var headerChunk = new HeaderChunk
{
FileFormat = (ushort)format,
TimeDivision = TimeDivision,
TracksNumber = (ushort)trackChunksCount
};
headerChunk.Write(writer, settings);
foreach (var chunk in chunks)
{
if (settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteUnknownChunks) && chunk is UnknownChunk)
{
continue;
}
chunk.Write(writer, settings);
}
}
}
public IEnumerable <MidiChunk> Convert(IEnumerable <MidiChunk> chunks)
{
ThrowIfArgument.IsNull(nameof(chunks), chunks);
var trackChunks = chunks.OfType <TrackChunk>().ToArray();
if (trackChunks.Length == 0)
{
return(chunks);
}
var sequenceNumbers = trackChunks.Select((c, i) => new { Chunk = c, Number = GetSequenceNumber(c) ?? i })
.ToArray();
var singleTrackChunksConverter = ChunksConverterFactory.GetConverter(MidiFileFormat.SingleTrack);
return(sequenceNumbers.GroupBy(n => n.Number)
.SelectMany(g => singleTrackChunksConverter.Convert(g.Select(n => n.Chunk)))
.Concat(chunks.Where(c => !(c is TrackChunk))));
}
