func (s *SystemPort) writeEvent(event Event) error {
status := event.Command + event.Channel
message := ((uint32(event.Data2) << 16) & 0xFF0000) |
((uint32(event.Data1) << 8) & 0x00FF00) |
(uint32(status) & 0x0000FF)
if debug {
//spew.Dump(event, message)
fmt.Printf("%b\n", message)
}
buffer := C.PmEvent{C.PmMessage(message), 0}
err := C.Pm_Write(s.stream, &buffer, C.int32_t(1))
return makePortMidiError(err)
}
// Write writes a buffer of MIDI events to the output stream.
func (s *Stream) Write(events []Event) error {
size := len(events)
if size > maxEventBufferSize {
return ErrMaxBuffer
}
buffer := make([]C.PmEvent, size)
for i, evt := range events {
var event C.PmEvent
event.timestamp = C.PmTimestamp(evt.Timestamp)
event.message = C.PmMessage((((evt.Data2 << 16) & 0xFF0000) | ((evt.Data1 << 8) & 0xFF00) | (evt.Status & 0xFF)))
buffer[i] = event
}
return convertToError(C.Pm_Write(unsafe.Pointer(s.pmStream), &buffer[0], C.int32_t(size)))
}