macosx/coremidi/JackCoreMidiOutputPort.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 __JackCoreMidiOutputPort__
  21 #define __JackCoreMidiOutputPort__
  22
  23 #include <semaphore.h>
  24
  25 #include "JackCoreMidiPort.h"
  26 #include "JackMidiAsyncQueue.h"
  27 #include "JackMidiBufferReadQueue.h"
  28 #include "JackThread.h"
  29
  30 namespace Jack {
  31
  32     class JackCoreMidiOutputPort:
  33         public JackCoreMidiPort, public JackRunnableInterface {
  34
  35     private:
  36
  37         jack_midi_event_t *
  38         GetCoreMidiEvent(bool block);
  39
  40         MIDITimeStamp
  41         GetTimeStampFromFrames(jack_nframes_t frames);
  42
  43         static const size_t PACKET_BUFFER_SIZE = 65536;
  44
  45         SInt32 advance_schedule_time;
  46         char packet_buffer[PACKET_BUFFER_SIZE];
  47         JackMidiBufferReadQueue *read_queue;
  48         char semaphore_name[128];
  49         JackThread *thread;
  50         JackMidiAsyncQueue *thread_queue;
  51         sem_t *thread_queue_semaphore;
  52
  53     protected:
  54
  55         virtual bool
  56         SendPacketList(MIDIPacketList *packet_list) = 0;
  57
  58         void
  59         Initialize(const char *alias_name, const char *client_name,
  60                    const char *driver_name, int index,
  61                    MIDIEndpointRef endpoint, SInt32 advance_schedule_time);
  62
  63     public:
  64
  65         JackCoreMidiOutputPort(double time_ratio, size_t max_bytes=4096,
  66                                size_t max_messages=1024);
  67
  68         virtual
  69         ~JackCoreMidiOutputPort();
  70
  71         bool
  72         Execute();
  73
  74         bool
  75         Init();
  76
  77         void
  78         ProcessJack(JackMidiBuffer *port_buffer, jack_nframes_t frames);
  79
  80         bool
  81         Start();
  82
  83         bool
  84         Stop();
  85
  86     };
  87
  88 }
  89
  90 #endif