Jack2 1.9.8

JackFFADOMidiReceiveQueue.cpp

00001 /*
00002 Copyright (C) 2010 Devin Anderson
00003 
00004 This program is free software; you can redistribute it and/or modify
00005 it under the terms of the GNU Lesser General Public License as published by
00006 the Free Software Foundation; either version 2.1 of the License, or
00007 (at your option) any later version.
00008 
00009 This program is distributed in the hope that it will be useful,
00010 but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 GNU Lesser General Public License for more details.
00013 
00014 You should have received a copy of the GNU Lesser General Public License
00015 along with this program; if not, write to the Free Software
00016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017 
00018 */
00019 
00020 #include "JackFFADOMidiReceiveQueue.h"
00021 #include "JackMidiUtil.h"
00022 
00023 using Jack::JackFFADOMidiReceiveQueue;
00024 
00025 JackFFADOMidiReceiveQueue::JackFFADOMidiReceiveQueue()
00026 {
00027     // Empty
00028 }
00029 
00030 jack_midi_event_t *
00031 JackFFADOMidiReceiveQueue::DequeueEvent()
00032 {
00033     for (; index < length; index += 8) {
00034         uint32_t data = input_buffer[index];
00035         if (data & 0xff000000) {
00036             byte = (jack_midi_data_t) (data & 0xff);
00037             event.buffer = &byte;
00038             event.size = 1;
00039             event.time = last_frame + index;
00040             index += 8;
00041             return &event;
00042         }
00043     }
00044     return 0;
00045 }
00046 
00047 void
00048 JackFFADOMidiReceiveQueue::ResetInputBuffer(uint32_t *input_buffer,
00049                                             jack_nframes_t length)
00050 {
00051     this->input_buffer = input_buffer;
00052     index = 0;
00053     last_frame = GetLastFrame();
00054     this->length = length;
00055 }