JackALSARawMidiSendQueue.cpp
/*
Copyright (C) 2011 Devin Anderson
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cassert>
#include "JackALSARawMidiSendQueue.h"
#include "JackMidiUtil.h"
#include "JackError.h"
using Jack::JackALSARawMidiSendQueue;
JackALSARawMidiSendQueue::JackALSARawMidiSendQueue(snd_rawmidi_t *rawmidi,
size_t bytes_per_poll)
{
assert(bytes_per_poll > 0);
this->bytes_per_poll = bytes_per_poll;
this->rawmidi = rawmidi;
blocked = false;
bytes_available = bytes_per_poll;
}
Jack::JackMidiWriteQueue::EnqueueResult
JackALSARawMidiSendQueue::EnqueueEvent(jack_nframes_t time, size_t size,
jack_midi_data_t *buffer)
{
assert(size == 1);
if (time > GetCurrentFrame()) {
return EVENT_EARLY;
}
if (! bytes_available) {
return BUFFER_FULL;
}
ssize_t result = snd_rawmidi_write(rawmidi, buffer, 1);
switch (result) {
case 1:
blocked = false;
bytes_available--;
return OK;
case -EWOULDBLOCK:
blocked = true;
return BUFFER_FULL;
}
jack_error("JackALSARawMidiSendQueue::EnqueueEvent - snd_rawmidi_write: "
"%s", snd_strerror(result));
return EN_ERROR;
}
bool
JackALSARawMidiSendQueue::IsBlocked()
{
return blocked;
}
void
JackALSARawMidiSendQueue::ResetPollByteCount()
{
bytes_available = bytes_per_poll;
}
Jack::JackALSARawMidiSendQueue::EnqueueEvent
JackMidiWriteQueue::EnqueueResult EnqueueEvent(jack_nframes_t time, size_t size, jack_midi_data_t *buffer)
Definition: JackALSARawMidiSendQueue.cpp:39
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
Jack::JackALSARawMidiSendQueue
Definition: JackALSARawMidiSendQueue.h:29