private midiOutUnprepareHeader ( HMIDIOUT hmo, |
||
hmo | HMIDIOUT | |
lpMidiOutHdr | ||
cbMidiOutHdr | ||
return | MMRESULT |
/// <summary> /// Sends a System Exclusive (sysex) message to this MIDI output device. /// </summary> /// <param name="data">The message to send (as byte array)</param> /// <exception cref="DeviceException">The message cannot be sent.</exception> public void SendSysEx(Byte[] data) { lock (this) { //Win32API.MMRESULT result; IntPtr ptr; UInt32 size = (UInt32)Marshal.SizeOf <Win32API.MIDIHDR>(); Win32API.MIDIHDR header = new Win32API.MIDIHDR { lpData = System.Runtime.InteropServices.Marshal.AllocHGlobal(data.Length) }; for (int i = 0; i < data.Length; i++) { System.Runtime.InteropServices.Marshal.WriteByte(header.lpData, i, data[i]); } header.dwBufferLength = data.Length; header.dwBytesRecorded = data.Length; header.dwFlags = 0; try { ptr = System.Runtime.InteropServices.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; } //result = Win32API.midiOutPrepareHeader(handle, ptr, size); //if (result == 0) result = Win32API.midiOutLongMsg(handle, ptr, size); //if (result == 0) result = Win32API.midiOutUnprepareHeader(handle, ptr, size); CheckReturnCode(Win32API.midiOutPrepareHeader(handle, ptr, size)); CheckReturnCode(Win32API.midiOutLongMsg(handle, ptr, size)); CheckReturnCode(Win32API.midiOutUnprepareHeader(handle, ptr, size)); System.Runtime.InteropServices.Marshal.FreeHGlobal(header.lpData); System.Runtime.InteropServices.Marshal.FreeHGlobal(ptr); } }