|
private midiInPrepareHeader ( HMIDIIN hMidiIn, |
||
| hMidiIn | HMIDIIN | |
| headerPtr | ||
| cbMidiInHdr | ||
| return | MMRESULT | |
private IntPtr RecycleLongMsgBuffer(UIntPtr ptr)
{
IntPtr newPtr = unchecked ((IntPtr)(long)(ulong)ptr);
UInt32 size = (UInt32)Marshal.SizeOf <Win32API.MIDIHDR>();
CheckReturnCode(Win32API.midiInUnprepareHeader(handle, newPtr, size));
CheckReturnCode(Win32API.midiInPrepareHeader(handle, newPtr, size));
CheckReturnCode(Win32API.midiInAddBuffer(handle, newPtr, size));
//return unchecked((UIntPtr)(ulong)(long)newPtr);
return(newPtr);
}
private IntPtr RecycleLongMsgBuffer(UIntPtr ptr)
{
IntPtr newPtr = unchecked ((IntPtr)(long)(ulong)ptr);
UInt32 size = (UInt32)System.Runtime.InteropServices.Marshal.SizeOf(typeof(Win32API.MIDIHDR));
CheckReturnCode(Win32API.midiInUnprepareHeader(handle, newPtr, size));
CheckReturnCode(Win32API.midiInPrepareHeader(handle, newPtr, size));
CheckReturnCode(Win32API.midiInAddBuffer(handle, newPtr, size));
//return unchecked((UIntPtr)(ulong)(long)newPtr);
return(newPtr);
}
private IntPtr CreateLongMsgBuffer()
{
//add a buffer so we can receive SysEx messages
IntPtr ptr;
UInt32 size = (UInt32)Marshal.SizeOf <Win32API.MIDIHDR>();
Win32API.MIDIHDR header = new Win32API.MIDIHDR
{
lpData = Marshal.AllocHGlobal(4096),
dwBufferLength = 4096,
dwFlags = 0
};
try
{
ptr = Marshal.AllocHGlobal(Marshal.SizeOf <Win32API.MIDIHDR>());
}
catch (Exception)
{
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
throw;
}
try
{
System.Runtime.InteropServices.Marshal.StructureToPtr(header, ptr, false);
}
catch (Exception)
{
System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData);
System.Runtime.InteropServices.Marshal.FreeHGlobal(ptr);
throw;
}
CheckReturnCode(Win32API.midiInPrepareHeader(handle, ptr, size));
CheckReturnCode(Win32API.midiInAddBuffer(handle, ptr, size));
//CheckReturnCode(Win32API.midiInUnprepareHeader(handle, ptr, size));
return(ptr);
}
