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
24 using Jack::JackMidiBufferWriteQueue;
25
JackMidiBufferWriteQueue()26 JackMidiBufferWriteQueue::JackMidiBufferWriteQueue()
27 {
28 // Empty
29 }
30
31 Jack::JackMidiWriteQueue::EnqueueResult
EnqueueEvent(jack_nframes_t time,size_t size,jack_midi_data_t * data)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
ResetMidiBuffer(JackMidiBuffer * buffer,jack_nframes_t frames)50 JackMidiBufferWriteQueue::ResetMidiBuffer(JackMidiBuffer *buffer,
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 }
67