linux/alsarawmidi/JackALSARawMidiSendQueue.cpp

   1 #include <cassert>
   2
   3 #include "JackALSARawMidiSendQueue.h"
   4 #include "JackMidiUtil.h"
   5
   6 using Jack::JackALSARawMidiSendQueue;
   7
   8 JackALSARawMidiSendQueue::JackALSARawMidiSendQueue(snd_rawmidi_t *rawmidi)
   9 {
  10     this->rawmidi = rawmidi;
  11     blocked = false;
  12 }
  13
  14 Jack::JackMidiWriteQueue::EnqueueResult
  15 JackALSARawMidiSendQueue::EnqueueEvent(jack_nframes_t time, size_t size,
  16                                        jack_midi_data_t *buffer)
  17 {
  18     assert(size == 1);
  19     if (time > GetCurrentFrame()) {
  20         return EVENT_EARLY;
  21     }
  22     ssize_t result = snd_rawmidi_write(rawmidi, buffer, 1);
  23     switch (result) {
  24     case 1:
  25         blocked = false;
  26         return OK;
  27     case -EWOULDBLOCK:
  28         blocked = true;
  29         return BUFFER_FULL;
  30     }
  31     jack_error("JackALSARawMidiSendQueue::EnqueueEvent - snd_rawmidi_write: "
  32                "%s", snd_strerror(result));
  33     return EN_ERROR;
  34 }
  35
  36 bool
  37 JackALSARawMidiSendQueue::IsBlocked()
  38 {
  39     return blocked;
  40 }