private void Write(Int32 when, MidiMessage msg)
{
var ret = PortMidiMarshal.Pm_WriteShort(stream, when, msg);
if (ret != MidiErrorType.NoError)
{
throw new MidiException(ret,
$"Failed to write message {msg.Value} : {PortMidiMarshal.Pm_GetErrorText((MidiErrorType) ret)}");
}
}
private void WriteSysEx(Int32 when, byte[] sysEx)
{
var ret = PortMidiMarshal.Pm_WriteSysEx(stream, when, sysEx);
if (ret != MidiErrorType.NoError)
{
throw new MidiException(ret,
$"Failed to write sysEx message : {PortMidiMarshal.Pm_GetErrorText((MidiErrorType) ret)}");
}
}
private void Write(MidiEvent[] buffer, int index, int length)
{
var gch = GCHandle.Alloc(buffer);
try
{
var ptr = Marshal.UnsafeAddrOfPinnedArrayElement(buffer, index);
var ret = PortMidiMarshal.Pm_Write(stream, ptr, length);
if (ret != MidiErrorType.NoError)
{
throw new MidiException(ret,
$"Failed to write messages : {PortMidiMarshal.Pm_GetErrorText((MidiErrorType) ret)}");
}
}
finally
{
gch.Free();
}
}
public int Read(byte[] buffer, int index, int length)
{
var gch = GCHandle.Alloc(buffer);
try
{
var ptr = Marshal.UnsafeAddrOfPinnedArrayElement(buffer, index);
int size = PortMidiMarshal.Pm_Read(stream, ptr, length);
if (size < 0)
{
throw new MidiException((MidiErrorType)size,
PortMidiMarshal.Pm_GetErrorText((MidiErrorType)size));
}
return(size * 4);
}
finally
{
gch.Free();
}
}
