linux/alsarawmidi/JackALSARawMidiPort.h

   1 /*
   2 Copyright (C) 2011 Devin Anderson
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation; either version 2 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 General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __JackALSARawMidiPort__
  21 #define __JackALSARawMidiPort__
  22
  23 #include <alsa/asoundlib.h>
  24 #include <poll.h>
  25
  26 #include "JackConstants.h"
  27
  28 namespace Jack {
  29
  30     class JackALSARawMidiPort {
  31
  32     private:
  33
  34         char alias[REAL_JACK_PORT_NAME_SIZE];
  35         struct pollfd *alsa_poll_fds;
  36         int alsa_poll_fd_count;
  37         int fds[2];
  38         unsigned short io_mask;
  39         char name[REAL_JACK_PORT_NAME_SIZE];
  40         struct pollfd *queue_poll_fd;
  41
  42     protected:
  43
  44         snd_rawmidi_t *rawmidi;
  45
  46         int
  47         GetIOPollEvent();
  48
  49         int
  50         GetQueuePollEvent();
  51
  52         void
  53         SetIOEventsEnabled(bool enabled);
  54
  55         void
  56         SetQueueEventsEnabled(bool enabled);
  57
  58         bool
  59         TriggerQueueEvent();
  60
  61     public:
  62
  63         JackALSARawMidiPort(snd_rawmidi_info_t *info, size_t index,
  64                             unsigned short io_mask);
  65
  66         virtual
  67         ~JackALSARawMidiPort();
  68
  69         const char *
  70         GetAlias();
  71
  72         const char *
  73         GetName();
  74
  75         int
  76         GetPollDescriptorCount();
  77
  78         void
  79         PopulatePollDescriptors(struct pollfd *poll_fd);
  80
  81     };
  82
  83 }
  84
  85 #endif