/// <summary>
/// サンプリング周波数とデバイス ID を指定して新しい MidiInConnector クラスのインスタンスを初期化します。
/// </summary>
/// <param name="id">オープンされる MIDI-IN デバイスの ID。</param>
public MidiIn(int id)
{
CheckPlatform();
midiInProc = MidiProc;
handle = IntPtr.Zero;
exclusiveQueue = new Queue<byte[]>();
if (!Open(id))
throw new InvalidOperationException();
headerSize = (uint)Marshal.SizeOf(typeof(NativeMethods.MIDIHDR));
midiHeader = new NativeMethods.MIDIHDR
{
data = Marshal.AllocHGlobal(BufferSize),
bufferLength = BufferSize
};
Marshal.Copy(new byte[BufferSize], 0, midiHeader.data, BufferSize);
ptrHeader = Marshal.AllocHGlobal((int)headerSize);
Marshal.StructureToPtr(midiHeader, ptrHeader, true);
NativeMethods.midiInPrepareHeader(handle, ptrHeader, headerSize);
NativeMethods.midiInAddBuffer(handle, ptrHeader, headerSize);
}
public MidiBuffer(int bufferSize, IntPtr userData)
{
// Allocate unmanaged buffer
this.buffer = Marshal.AllocHGlobal(bufferSize);
// Allocate unmanaged buffer descriptor
this.header = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NativeMethods.MIDIHDR)));
this.headerSize = (uint)Marshal.SizeOf(typeof(NativeMethods.MIDIHDR));
this.preparedForMidiIn = false;
this.preparedForMidiOut = false;
// Build a buffer descriptor in the managed space
var managedHeader = new NativeMethods.MIDIHDR();
managedHeader.lpData = buffer;
managedHeader.dwBufferLength = (uint)bufferSize;
managedHeader.dwBytesRecorded = 0;
managedHeader.dwUser = userData;
managedHeader.dwFlags = 0; // Required to be zero before calling the prepare function
managedHeader.lpNext = IntPtr.Zero;
managedHeader.reserved = IntPtr.Zero;
managedHeader.dwOffset = 0;
// Copy the managed object into the newly created unmanaged buffer
Marshal.StructureToPtr(managedHeader, header, false);
}
/// <summary>
/// サンプリング周波数とデバイス ID を指定して新しい MidiInConnector クラスのインスタンスを初期化します。
/// </summary>
/// <param name="id">オープンされる MIDI-IN デバイスの ID。</param>
public MidiIn(int id)
{
CheckPlatform();
midiInProc = MidiProc;
handle = IntPtr.Zero;
exclusiveQueue = new Queue <byte[]>();
if (!Open(id))
{
throw new InvalidOperationException();
}
headerSize = (uint)Marshal.SizeOf(typeof(NativeMethods.MIDIHDR));
midiHeader = new NativeMethods.MIDIHDR
{
data = Marshal.AllocHGlobal(BufferSize),
bufferLength = BufferSize
};
Marshal.Copy(new byte[BufferSize], 0, midiHeader.data, BufferSize);
ptrHeader = Marshal.AllocHGlobal((int)headerSize);
Marshal.StructureToPtr(midiHeader, ptrHeader, true);
NativeMethods.midiInPrepareHeader(handle, ptrHeader, headerSize);
NativeMethods.midiInAddBuffer(handle, ptrHeader, headerSize);
}
private void MidiProc(IntPtr hMidiIn, int wMsg, IntPtr dwInstance, int dwParam1, int dwParam2)
{
if (wMsg == NativeMethods.MIM_DATA)
{
if (IsDisposed || !IsPlaying)
return;
if (ReceivedMidiEvent == null)
return;
var @event = new MidiEvent((EventType)(dwParam1 & 0xf0),
dwParam1 & 0x0f,
dwParam1 >> 8 & 0xff,
dwParam1 >> 16 & 0xff);
ReceivedMidiEvent(this, new ReceivedMidiEventEventArgs(@event, this));
}
else if (wMsg == NativeMethods.MIM_LONGDATA)
{
if (IsDisposed || !IsPlaying)
return;
midiHeader = (NativeMethods.MIDIHDR)Marshal.PtrToStructure(ptrHeader,
typeof(NativeMethods.MIDIHDR));
var buffer = new byte[BufferSize];
Marshal.Copy(midiHeader.data, buffer, 0, BufferSize);
var length = Array.IndexOf<byte>(buffer, 0xf7, 0, BufferSize);
if (length == -1)
{
exclusiveQueue.Enqueue(buffer);
}
else
{
if (ReceivedExclusiveMessage != null)
{
var data = exclusiveQueue.SelectMany(a => a).Concat(buffer.Take(length)).Skip(1);
ReceivedExclusiveMessage(this, new ReceivedExclusiveMessageEventArgs(data.ToArray(), this));
}
exclusiveQueue.Clear();
}
if (!isClosing)
NativeMethods.midiInAddBuffer(handle, ptrHeader, headerSize);
}
else if (wMsg == NativeMethods.MIM_OPEN)
{
Opened?.Invoke(this, new EventArgs());
}
else if (wMsg == NativeMethods.MIM_CLOSE)
{
Closed?.Invoke(this, new EventArgs());
}
}
private void MidiProc(IntPtr hMidiIn, int wMsg, IntPtr dwInstance, int dwParam1, int dwParam2)
{
if (wMsg == NativeMethods.MIM_DATA)
{
if (IsDisposed || !IsPlaying)
{
return;
}
if (ReceivedMidiEvent == null)
{
return;
}
var @event = new MidiEvent((EventType)(dwParam1 & 0xf0),
dwParam1 & 0x0f,
dwParam1 >> 8 & 0xff,
dwParam1 >> 16 & 0xff);
ReceivedMidiEvent(this, new ReceivedMidiEventEventArgs(@event, this));
}
else if (wMsg == NativeMethods.MIM_LONGDATA)
{
if (IsDisposed || !IsPlaying)
{
return;
}
midiHeader = (NativeMethods.MIDIHDR)Marshal.PtrToStructure(ptrHeader,
typeof(NativeMethods.MIDIHDR));
var buffer = new byte[BufferSize];
Marshal.Copy(midiHeader.data, buffer, 0, BufferSize);
var length = Array.IndexOf <byte>(buffer, 0xf7, 0, BufferSize);
if (length == -1)
{
exclusiveQueue.Enqueue(buffer);
}
else
{
if (ReceivedExclusiveMessage != null)
{
var data = exclusiveQueue.SelectMany(a => a).Concat(buffer.Take(length)).Skip(1);
ReceivedExclusiveMessage(this, new ReceivedExclusiveMessageEventArgs(data.ToArray(), this));
}
exclusiveQueue.Clear();
}
if (!isClosing)
{
NativeMethods.midiInAddBuffer(handle, ptrHeader, headerSize);
}
}
else if (wMsg == NativeMethods.MIM_OPEN)
{
Opened?.Invoke(this, new EventArgs());
}
else if (wMsg == NativeMethods.MIM_CLOSE)
{
Closed?.Invoke(this, new EventArgs());
}
}
public void SendLongMessage( byte[] msg )
{
uint hdrSize = (uint)Marshal.SizeOf(typeof(NativeMethods.MIDIHDR));
var midiHdr = new NativeMethods.MIDIHDR();
byte[] hdrReserved = new byte[8];
GCHandle alchandle = GCHandle.Alloc(msg, GCHandleType.Pinned);
GCHandle revHandle = GCHandle.Alloc(hdrReserved, GCHandleType.Pinned);
midiHdr.lpData = alchandle.AddrOfPinnedObject();
midiHdr.dwBufferLength = (uint)msg.Length;
midiHdr.dwFlags = 0;
NativeMethods.midiOutPrepareHeader(handle, ref midiHdr, hdrSize);
while ((midiHdr.dwFlags & NativeMethods.MidiHdrFlag.MHDR_PREPARED) != NativeMethods.MidiHdrFlag.MHDR_PREPARED) {
Thread.Sleep(1);
}
NativeMethods.midiOutLongMsg(handle, ref midiHdr, hdrSize);
while ((midiHdr.dwFlags & NativeMethods.MidiHdrFlag.MHDR_DONE) != NativeMethods.MidiHdrFlag.MHDR_DONE) {
Thread.Sleep(1);
}
NativeMethods.midiOutUnprepareHeader(handle, ref midiHdr, hdrSize);
alchandle.Free();
revHandle.Free();
}
