Jack2  1.9.9
JackMidiBufferWriteQueue.cpp
1 /*
2 Copyright (C) 2010 Devin Anderson
3 
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2.1 of the License, or
7 (at your option) any later version.
8 
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU Lesser General Public License for more details.
13 
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 
18 */
19 
20 #include "JackMidiBufferWriteQueue.h"
21 #include "JackMidiUtil.h"
22 #include "JackError.h"
23 
25 
26 JackMidiBufferWriteQueue::JackMidiBufferWriteQueue()
27 {
28  // Empty
29 }
30 
31 Jack::JackMidiWriteQueue::EnqueueResult
32 JackMidiBufferWriteQueue::EnqueueEvent(jack_nframes_t time, size_t size,
33  jack_midi_data_t *data)
34 {
35  if (time >= next_frame_time) {
36  return EVENT_EARLY;
37  }
38  if (time < last_frame_time) {
39  time = last_frame_time;
40  }
41  jack_midi_data_t *dst = buffer->ReserveEvent(time - last_frame_time, size);
42  if (! dst) {
43  return size > max_bytes ? BUFFER_TOO_SMALL : BUFFER_FULL;
44  }
45  memcpy(dst, data, size);
46  return OK;
47 }
48 
49 void
51  jack_nframes_t frames)
52 {
53  if (! buffer) {
54  jack_error("JackMidiBufferWriteQueue::ResetMidiBuffer - buffer reset "
55  "to NULL");
56  } else if (! buffer->IsValid()) {
57  jack_error("JackMidiBufferWriteQueue::ResetMidiBuffer - buffer reset "
58  "to invalid buffer");
59  } else {
60  this->buffer = buffer;
61  buffer->Reset(frames);
62  last_frame_time = GetLastFrame();
63  max_bytes = buffer->MaxEventSize();
64  next_frame_time = last_frame_time + frames;
65  }
66 }
EnqueueResult EnqueueEvent(jack_nframes_t time, size_t size, jack_midi_data_t *buffer)
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:91
void ResetMidiBuffer(JackMidiBuffer *buffer, jack_nframes_t frames)