linux/firewire/JackFFADOMidiReceiveQueue.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 "JackFFADOMidiReceiveQueue.h"
  21 #include "JackMidiUtil.h"
  22
  23 using Jack::JackFFADOMidiReceiveQueue;
  24
  25 JackFFADOMidiReceiveQueue::JackFFADOMidiReceiveQueue()
  26 {
  27     // Empty
  28 }
  29
  30 jack_midi_event_t *
  31 JackFFADOMidiReceiveQueue::DequeueEvent()
  32 {
  33     for (; index < length; index += 8) {
  34         uint32_t data = input_buffer[index];
  35         if (data & 0xff000000) {
  36             byte = (jack_midi_data_t) (data & 0xff);
  37             event.buffer = &byte;
  38             event.size = 1;
  39             event.time = last_frame + index;
  40             index += 8;
  41             return &event;
  42         }
  43     }
  44     return 0;
  45 }
  46
  47 void
  48 JackFFADOMidiReceiveQueue::ResetInputBuffer(uint32_t *input_buffer,
  49                                             jack_nframes_t length)
  50 {
  51     this->input_buffer = input_buffer;
  52     index = 0;
  53     last_frame = GetLastFrame();
  54     this->length = length;
  55 }