/// <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);
}
}
}
/// <summary>
/// Reads a chunk from a MIDI-file.
/// </summary>
/// <param name="reader">Reader to read a chunk with.</param>
/// <param name="settings">Settings according to which a chunk must be read.</param>
/// <param name="actualTrackChunksCount">Actual count of track chunks at the moment.</param>
/// <param name="expectedTrackChunksCount">Expected count of track chunks.</param>
/// <returns>A MIDI-file chunk.</returns>
/// <exception cref="ObjectDisposedException">Method was called after the reader was disposed.</exception>
/// <exception cref="IOException">An I/O error occurred on the underlying stream.</exception>
/// <exception cref="UnknownChunkException">Chunk to be read has unknown ID and that
/// should be treated as error accordng to the specified <paramref name="settings"/>.</exception>
/// <exception cref="UnexpectedTrackChunksCountException">Actual track chunks
/// count is greater than expected one and that should be treated as error according to
/// the specified <paramref name="settings"/>.</exception>
/// <exception cref="InvalidChunkSizeException">Actual chunk's size differs from the one declared
/// in its header and that should be treated as error according to the specified
/// <paramref name="settings"/>.</exception>
/// <exception cref="UnknownChannelEventException">Reader has encountered an unknown channel event.</exception>
/// <exception cref="NotEnoughBytesException">Value cannot be read since the reader's underlying stream
/// doesn't have enough bytes.</exception>
/// <exception cref="UnexpectedRunningStatusException">Unexpected running status is encountered.</exception>
/// <exception cref="MissedEndOfTrackEventException">Track chunk doesn't end with End Of Track event and that
/// should be treated as error accordng to the specified <paramref name="settings"/>.</exception>
/// <exception cref="InvalidChannelEventParameterValueException">Value of a channel event's parameter
/// just read is invalid.</exception>
/// <exception cref="InvalidMetaEventParameterValueException">Value of a meta event's parameter
/// just read is invalid.</exception>
private static MidiChunk ReadChunk(MidiReader reader, ReadingSettings settings, int actualTrackChunksCount, int?expectedTrackChunksCount)
{
MidiChunk chunk = null;
try
{
var chunkId = reader.ReadString(MidiChunk.IdLength);
if (chunkId.Length < MidiChunk.IdLength)
{
switch (settings.NotEnoughBytesPolicy)
{
case NotEnoughBytesPolicy.Abort:
throw new NotEnoughBytesException("Chunk ID cannot be read since the reader's underlying stream doesn't have enough bytes.",
MidiChunk.IdLength,
chunkId.Length);
case NotEnoughBytesPolicy.Ignore:
return(null);
}
}
//
switch (chunkId)
{
case HeaderChunk.Id:
chunk = new HeaderChunk();
break;
case TrackChunk.Id:
chunk = new TrackChunk();
break;
default:
chunk = TryCreateChunk(chunkId, settings.CustomChunkTypes);
break;
}
//
if (chunk == null)
{
switch (settings.UnknownChunkIdPolicy)
{
case UnknownChunkIdPolicy.ReadAsUnknownChunk:
chunk = new UnknownChunk(chunkId);
break;
case UnknownChunkIdPolicy.Skip:
var size = reader.ReadDword();
reader.Position += size;
return(null);
case UnknownChunkIdPolicy.Abort:
throw new UnknownChunkException($"'{chunkId}' chunk ID is unknown.", chunkId);
}
}
//
if (chunk is TrackChunk && expectedTrackChunksCount != null && actualTrackChunksCount >= expectedTrackChunksCount)
{
ReactOnUnexpectedTrackChunksCount(settings.UnexpectedTrackChunksCountPolicy, actualTrackChunksCount, expectedTrackChunksCount.Value);
switch (settings.ExtraTrackChunkPolicy)
{
case ExtraTrackChunkPolicy.Read:
break;
case ExtraTrackChunkPolicy.Skip:
var size = reader.ReadDword();
reader.Position += size;
return(null);
}
}
//
chunk.Read(reader, settings);
}
catch (NotEnoughBytesException ex)
{
ReactOnNotEnoughBytes(settings.NotEnoughBytesPolicy, ex);
}
catch (EndOfStreamException ex)
{
ReactOnNotEnoughBytes(settings.NotEnoughBytesPolicy, ex);
}
return(chunk);
}
