README
1The file native/jni/midi-dssi/gnu_javax_sound_midi_dssi_DSSISynthesizer.c
2contains two functions (get_port_default and set_control) derived from
3example code in the DSSI distribution (http://dssi.sourceforge.net).
4The original DSSI example code is distributed under the following
5terms:
6
7 Copyright 2004 Chris Cannam, Steve Harris and Sean Bolton.
8
9 Permission to use, copy, modify, distribute, and sell this software
10 for any purpose is hereby granted without fee, provided that the
11 above copyright notice and this permission notice are included in
12 all copies or substantial portions of the software.
13
14
15The rest of this file contain the original versions of these
16functions.
17
18
19LADSPA_Data get_port_default(const LADSPA_Descriptor *plugin, int port)
20{
21 LADSPA_PortRangeHint hint = plugin->PortRangeHints[port];
22 float lower = hint.LowerBound *
23 (LADSPA_IS_HINT_SAMPLE_RATE(hint.HintDescriptor) ? sample_rate : 1.0f);
24 float upper = hint.UpperBound *
25 (LADSPA_IS_HINT_SAMPLE_RATE(hint.HintDescriptor) ? sample_rate : 1.0f);
26
27 if (!LADSPA_IS_HINT_HAS_DEFAULT(hint.HintDescriptor)) {
28 if (!LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor) ||
29 !LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor)) {
30 /* No hint, its not bounded, wild guess */
31 return 0.0f;
32 }
33
34 if (lower <= 0.0f && upper >= 0.0f) {
35 /* It spans 0.0, 0.0 is often a good guess */
36 return 0.0f;
37 }
38
39 /* No clues, return minimum */
40 return lower;
41 }
42
43 /* Try all the easy ones */
44
45 if (LADSPA_IS_HINT_DEFAULT_0(hint.HintDescriptor)) {
46 return 0.0f;
47 } else if (LADSPA_IS_HINT_DEFAULT_1(hint.HintDescriptor)) {
48 return 1.0f;
49 } else if (LADSPA_IS_HINT_DEFAULT_100(hint.HintDescriptor)) {
50 return 100.0f;
51 } else if (LADSPA_IS_HINT_DEFAULT_440(hint.HintDescriptor)) {
52 return 440.0f;
53 }
54
55 /* All the others require some bounds */
56
57 if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor)) {
58 if (LADSPA_IS_HINT_DEFAULT_MINIMUM(hint.HintDescriptor)) {
59 return lower;
60 }
61 }
62 if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor)) {
63 if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(hint.HintDescriptor)) {
64 return upper;
65 }
66 if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor)) {
67 if (LADSPA_IS_HINT_DEFAULT_LOW(hint.HintDescriptor)) {
68 return lower * 0.75f + upper * 0.25f;
69 } else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(hint.HintDescriptor)) {
70 return lower * 0.5f + upper * 0.5f;
71 } else if (LADSPA_IS_HINT_DEFAULT_HIGH(hint.HintDescriptor)) {
72 return lower * 0.25f + upper * 0.75f;
73 }
74 }
75 }
76
77 /* fallback */
78 return 0.0f;
79}
80
81
82void
83setControl(d3h_instance_t *instance, long controlIn, snd_seq_event_t *event)
84{
85 long port = pluginControlInPortNumbers[controlIn];
86
87 const LADSPA_Descriptor *p = instance->plugin->descriptor->LADSPA_Plugin;
88
89 LADSPA_PortRangeHintDescriptor d = p->PortRangeHints[port].HintDescriptor;
90
91 LADSPA_Data lb = p->PortRangeHints[port].LowerBound *
92 (LADSPA_IS_HINT_SAMPLE_RATE(p->PortRangeHints[port].HintDescriptor) ?
93 sample_rate : 1.0f);
94
95 LADSPA_Data ub = p->PortRangeHints[port].UpperBound *
96 (LADSPA_IS_HINT_SAMPLE_RATE(p->PortRangeHints[port].HintDescriptor) ?
97 sample_rate : 1.0f);
98
99 float value = (float)event->data.control.value;
100
101 if (!LADSPA_IS_HINT_BOUNDED_BELOW(d)) {
102 if (!LADSPA_IS_HINT_BOUNDED_ABOVE(d)) {
103 /* unbounded: might as well leave the value alone. */
104 } else {
105 /* bounded above only. just shift the range. */
106 value = ub - 127.0f + value;
107 }
108 } else {
109 if (!LADSPA_IS_HINT_BOUNDED_ABOVE(d)) {
110 /* bounded below only. just shift the range. */
111 value = lb + value;
112 } else {
113 /* bounded both ends. more interesting. */
114 if (LADSPA_IS_HINT_LOGARITHMIC(d)) {
115 const float llb = logf(lb);
116 const float lub = logf(ub);
117
118 value = expf(llb + ((lub - llb) * value / 127.0f));
119 } else {
120 value = lb + ((ub - lb) * value / 127.0f);
121 }
122 }
123 }
124
125 if (verbose) {
126 printf("%s: %s MIDI controller %d=%d -> control in %ld=%f\n", myName,
127 instance->friendly_name, event->data.control.param,
128 event->data.control.value, controlIn, value);
129 }
130
131 pluginControlIns[controlIn] = value;
132 pluginPortUpdated[controlIn] = 1;
133}
134
135