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jeremybenn |
The file native/jni/midi-dssi/gnu_javax_sound_midi_dssi_DSSISynthesizer.c
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contains two functions (get_port_default and set_control) derived from
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example code in the DSSI distribution (http://dssi.sourceforge.net).
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The original DSSI example code is distributed under the following
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terms:
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Copyright 2004 Chris Cannam, Steve Harris and Sean Bolton.
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Permission to use, copy, modify, distribute, and sell this software
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for any purpose is hereby granted without fee, provided that the
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above copyright notice and this permission notice are included in
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all copies or substantial portions of the software.
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The rest of this file contain the original versions of these
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functions.
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LADSPA_Data get_port_default(const LADSPA_Descriptor *plugin, int port)
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{
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LADSPA_PortRangeHint hint = plugin->PortRangeHints[port];
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float lower = hint.LowerBound *
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(LADSPA_IS_HINT_SAMPLE_RATE(hint.HintDescriptor) ? sample_rate : 1.0f);
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float upper = hint.UpperBound *
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(LADSPA_IS_HINT_SAMPLE_RATE(hint.HintDescriptor) ? sample_rate : 1.0f);
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if (!LADSPA_IS_HINT_HAS_DEFAULT(hint.HintDescriptor)) {
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if (!LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor) ||
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!LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor)) {
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/* No hint, its not bounded, wild guess */
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return 0.0f;
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}
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if (lower <= 0.0f && upper >= 0.0f) {
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/* It spans 0.0, 0.0 is often a good guess */
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return 0.0f;
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}
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/* No clues, return minimum */
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return lower;
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}
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/* Try all the easy ones */
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if (LADSPA_IS_HINT_DEFAULT_0(hint.HintDescriptor)) {
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return 0.0f;
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} else if (LADSPA_IS_HINT_DEFAULT_1(hint.HintDescriptor)) {
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return 1.0f;
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} else if (LADSPA_IS_HINT_DEFAULT_100(hint.HintDescriptor)) {
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return 100.0f;
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} else if (LADSPA_IS_HINT_DEFAULT_440(hint.HintDescriptor)) {
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return 440.0f;
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}
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/* All the others require some bounds */
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if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor)) {
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if (LADSPA_IS_HINT_DEFAULT_MINIMUM(hint.HintDescriptor)) {
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return lower;
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}
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}
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if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor)) {
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if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(hint.HintDescriptor)) {
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return upper;
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}
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if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor)) {
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if (LADSPA_IS_HINT_DEFAULT_LOW(hint.HintDescriptor)) {
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return lower * 0.75f + upper * 0.25f;
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} else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(hint.HintDescriptor)) {
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return lower * 0.5f + upper * 0.5f;
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} else if (LADSPA_IS_HINT_DEFAULT_HIGH(hint.HintDescriptor)) {
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return lower * 0.25f + upper * 0.75f;
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}
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}
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}
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/* fallback */
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return 0.0f;
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}
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void
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setControl(d3h_instance_t *instance, long controlIn, snd_seq_event_t *event)
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{
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long port = pluginControlInPortNumbers[controlIn];
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const LADSPA_Descriptor *p = instance->plugin->descriptor->LADSPA_Plugin;
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LADSPA_PortRangeHintDescriptor d = p->PortRangeHints[port].HintDescriptor;
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LADSPA_Data lb = p->PortRangeHints[port].LowerBound *
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(LADSPA_IS_HINT_SAMPLE_RATE(p->PortRangeHints[port].HintDescriptor) ?
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sample_rate : 1.0f);
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LADSPA_Data ub = p->PortRangeHints[port].UpperBound *
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(LADSPA_IS_HINT_SAMPLE_RATE(p->PortRangeHints[port].HintDescriptor) ?
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sample_rate : 1.0f);
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float value = (float)event->data.control.value;
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if (!LADSPA_IS_HINT_BOUNDED_BELOW(d)) {
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if (!LADSPA_IS_HINT_BOUNDED_ABOVE(d)) {
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/* unbounded: might as well leave the value alone. */
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} else {
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/* bounded above only. just shift the range. */
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value = ub - 127.0f + value;
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}
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} else {
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if (!LADSPA_IS_HINT_BOUNDED_ABOVE(d)) {
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/* bounded below only. just shift the range. */
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value = lb + value;
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} else {
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/* bounded both ends. more interesting. */
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if (LADSPA_IS_HINT_LOGARITHMIC(d)) {
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const float llb = logf(lb);
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const float lub = logf(ub);
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value = expf(llb + ((lub - llb) * value / 127.0f));
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} else {
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value = lb + ((ub - lb) * value / 127.0f);
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}
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}
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}
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if (verbose) {
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printf("%s: %s MIDI controller %d=%d -> control in %ld=%f\n", myName,
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instance->friendly_name, event->data.control.param,
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event->data.control.value, controlIn, value);
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}
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pluginControlIns[controlIn] = value;
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pluginPortUpdated[controlIn] = 1;
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}
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