diff options
Diffstat (limited to 'src/libs/engine/LADSPANode.cpp')
| -rw-r--r-- | src/libs/engine/LADSPANode.cpp | 79 |
1 files changed, 74 insertions, 5 deletions
diff --git a/src/libs/engine/LADSPANode.cpp b/src/libs/engine/LADSPANode.cpp index 17a3e53d..da053b35 100644 --- a/src/libs/engine/LADSPANode.cpp +++ b/src/libs/engine/LADSPANode.cpp @@ -111,11 +111,7 @@ LADSPANode::instantiate() } assert(_ports->at(j) != NULL); - - /*PortInfo* pi = port->port_info(); - get_port_vals(j, pi); - */ - float default_val = 0.; // FIXME + sample default_val = default_port_value(j); // Set default control val if (port->buffer_size() == 1) @@ -264,5 +260,78 @@ LADSPANode::get_port_vals(ulong port_index, PortInfo* info) } #endif + +sample +LADSPANode::default_port_value(ulong port_index) +{ + LADSPA_Data normal = 0.0f; + LADSPA_Data upper = 0.0f; + LADSPA_Data lower = 0.0f; + LADSPA_PortRangeHintDescriptor hint_descriptor = _descriptor->PortRangeHints[port_index].HintDescriptor; + + /* set upper and lower, possibly adjusted to the sample rate */ + if (LADSPA_IS_HINT_SAMPLE_RATE(hint_descriptor)) { + upper = _descriptor->PortRangeHints[port_index].UpperBound * _srate; + lower = _descriptor->PortRangeHints[port_index].LowerBound * _srate; + } else { + upper = _descriptor->PortRangeHints[port_index].UpperBound; + lower = _descriptor->PortRangeHints[port_index].LowerBound; + } + + if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) { + /* FLT_EPSILON is defined as the different between 1.0 and the minimum + * float greater than 1.0. So, if lower is < FLT_EPSILON, it will be 1.0 + * and the logarithmic control will have a base of 1 and thus not change + */ + if (lower < FLT_EPSILON) lower = FLT_EPSILON; + } + + + if (LADSPA_IS_HINT_HAS_DEFAULT(hint_descriptor)) { + + if (LADSPA_IS_HINT_DEFAULT_MINIMUM(hint_descriptor)) { + normal = lower; + } else if (LADSPA_IS_HINT_DEFAULT_LOW(hint_descriptor)) { + if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) { + normal = exp(log(lower) * 0.75 + log(upper) * 0.25); + } else { + normal = lower * 0.75 + upper * 0.25; + } + } else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(hint_descriptor)) { + if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) { + normal = exp(log(lower) * 0.5 + log(upper) * 0.5); + } else { + normal = lower * 0.5 + upper * 0.5; + } + } else if (LADSPA_IS_HINT_DEFAULT_HIGH(hint_descriptor)) { + if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor)) { + normal = exp(log(lower) * 0.25 + log(upper) * 0.75); + } else { + normal = lower * 0.25 + upper * 0.75; + } + } else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(hint_descriptor)) { + normal = upper; + } else if (LADSPA_IS_HINT_DEFAULT_0(hint_descriptor)) { + normal = 0.0; + } else if (LADSPA_IS_HINT_DEFAULT_1(hint_descriptor)) { + normal = 1.0; + } else if (LADSPA_IS_HINT_DEFAULT_100(hint_descriptor)) { + normal = 100.0; + } else if (LADSPA_IS_HINT_DEFAULT_440(hint_descriptor)) { + normal = 440.0; + } + } else { // No default hint + if (LADSPA_IS_HINT_BOUNDED_BELOW(hint_descriptor)) { + normal = lower; + } else if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint_descriptor)) { + normal = upper; + } + } + + // FIXME: set min/max as metadata + return normal; +} + + } // namespace Om |