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