summaryrefslogtreecommitdiff
path: root/attic/muse2-oom/muse2/synti/libsynti/gui.cpp
blob: 23a18fee84cc614ef02c0ee87641332a396cb0fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
//=========================================================
//  MusE
//  Linux Music Editor
//    software synthesizer helper library
//    $Id: gui.cpp,v 1.5 2004/04/11 10:46:14 wschweer Exp $
//
//  (C) Copyright 2004 Werner Schweer (ws@seh.de)
//=========================================================

#include "gui.h"
#include "muse/midi.h"

#include <unistd.h>

//---------------------------------------------------------
//   MessGui
//---------------------------------------------------------

MessGui::MessGui()
      {
      //
      // prepare for interprocess communication:
      //
      int filedes[2];         // 0 - reading   1 - writing
      if (pipe(filedes) == -1) {
            perror("thread:creating pipe4");
            exit(-1);
            }
      readFd      = filedes[0];
      writeFd     = filedes[1];
      wFifoSize   = 0;
      wFifoWindex = 0;
      wFifoRindex = 0;
      rFifoSize   = 0;
      rFifoWindex = 0;
      rFifoRindex = 0;
      }

//---------------------------------------------------------
//   MessGui
//---------------------------------------------------------

MessGui::~MessGui()
      {
      }

//---------------------------------------------------------
//   readMessage
//---------------------------------------------------------

void MessGui::readMessage()
      {
      char c;
      while (rFifoSize) {
            ::read(readFd, &c, 1);
            processEvent(rFifo[rFifoRindex]);
            rFifoRindex = (rFifoRindex + 1) % EVENT_FIFO_SIZE;
            --rFifoSize;
            }
      }

//---------------------------------------------------------
//   sendEvent
//---------------------------------------------------------

void MessGui::sendEvent(const MidiPlayEvent& ev)
      {
      if (wFifoSize == EVENT_FIFO_SIZE) {
            printf("event gui->synti  fifo overflow\n");
            return;
            }
      wFifo[wFifoWindex] = ev;
      wFifoWindex = (wFifoWindex + 1) % EVENT_FIFO_SIZE;
      ++wFifoSize;
      }

//---------------------------------------------------------
//   sendController
//---------------------------------------------------------

void MessGui::sendController(int ch, int idx, int val)
      {
//      MidiPlayEvent pe(0, 0, ch, ME_CONTROLLER, idx, val);
//      sendEvent(pe);

      sendEvent(MidiPlayEvent(0, 0, ch, ME_CONTROLLER, idx, val));
      }

//---------------------------------------------------------
//   sendSysex
//---------------------------------------------------------

void MessGui::sendSysex(unsigned char* p, int n)
      {
//      MidiPlayEvent pe(0, 0, ME_SYSEX, p, n);
//      sendEvent(pe);
        
        sendEvent(MidiPlayEvent(0, 0, ME_SYSEX, p, n));
      }

//---------------------------------------------------------
//   writeEvent
//    send an event to synti gui
//---------------------------------------------------------

void MessGui::writeEvent(const MidiPlayEvent& ev)
      {
      if (rFifoSize == EVENT_FIFO_SIZE) {
            printf("event synti->gui  fifo overflow\n");
            return;
            }
      rFifo[rFifoWindex] = ev;
      rFifoWindex = (rFifoWindex + 1) % EVENT_FIFO_SIZE;
      ++rFifoSize;
      write(writeFd, "x", 1);  // wakeup GUI
      }

//---------------------------------------------------------
//   readEvent
//    read event from synti gui
//---------------------------------------------------------

MidiPlayEvent MessGui::readEvent()
      {
      MidiPlayEvent ev = wFifo[wFifoRindex];
      wFifoRindex = (wFifoRindex + 1) % EVENT_FIFO_SIZE;
      --wFifoSize;
      return ev;
      }