diff options
Diffstat (limited to 'utils/ladspa2lv2.c')
| -rw-r--r-- | utils/ladspa2lv2.c | 154 |
1 files changed, 128 insertions, 26 deletions
diff --git a/utils/ladspa2lv2.c b/utils/ladspa2lv2.c index 713481f..304f70d 100644 --- a/utils/ladspa2lv2.c +++ b/utils/ladspa2lv2.c @@ -16,9 +16,13 @@ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */ +#include <assert.h> #include <stdio.h> #include <stdlib.h> #include <inttypes.h> +#include <stdbool.h> +#include <float.h> +#include <math.h> #include <ladspa.h> #include <dlfcn.h> #include <librdf.h> @@ -30,26 +34,6 @@ librdf_world* world = NULL; -LADSPA_Descriptor* -load_ladspa_plugin(const char* lib_path, unsigned long index) -{ - void* const handle = dlopen(lib_path, RTLD_LAZY); - if (handle == NULL) - return NULL; - - LADSPA_Descriptor_Function df - = (LADSPA_Descriptor_Function)dlsym(handle, "ladspa_descriptor"); - - if (df == NULL) { - dlclose(handle); - return NULL; - } - - LADSPA_Descriptor* const descriptor = (LADSPA_Descriptor*)df(index); - - return descriptor; -} - void add_resource(librdf_model* model, @@ -149,6 +133,126 @@ add_float(librdf_model* model, } +LADSPA_Descriptor* +load_ladspa_plugin(const char* lib_path, unsigned long index) +{ + void* const handle = dlopen(lib_path, RTLD_LAZY); + if (handle == NULL) + return NULL; + + LADSPA_Descriptor_Function df + = (LADSPA_Descriptor_Function)dlsym(handle, "ladspa_descriptor"); + + if (df == NULL) { + dlclose(handle); + return NULL; + } + + LADSPA_Descriptor* const descriptor = (LADSPA_Descriptor*)df(index); + + return descriptor; +} + + +void +add_port_range(LADSPA_Descriptor* plugin, + unsigned long port_index, + librdf_model* model, + librdf_node* port) +{ + LADSPA_PortRangeHintDescriptor hint_descriptor + = plugin->PortRangeHints[port_index].HintDescriptor; + + bool range_valid = false; + float upper, lower, normal; + + /* Convert hints */ + + if (LADSPA_IS_HINT_SAMPLE_RATE(hint_descriptor)) { + add_resource(model, port, NS_LV2("portHint"), NS_LV2("sampleRate")); + upper = plugin->PortRangeHints[port_index].UpperBound; + lower = plugin->PortRangeHints[port_index].LowerBound; + range_valid = true; + } + + if (LADSPA_IS_HINT_INTEGER(hint_descriptor)) { + add_resource(model, port, NS_LV2("portHint"), NS_LV2("integer")); + upper = plugin->PortRangeHints[port_index].UpperBound; + lower = plugin->PortRangeHints[port_index].LowerBound; + range_valid = true; + } + + if (LADSPA_IS_HINT_TOGGLED(hint_descriptor)) { + add_resource(model, port, NS_LV2("portHint"), NS_LV2("toggled")); + upper = 1.0; + lower = 0.0; + range_valid = true; + } + + 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 (range_valid && lower < FLT_EPSILON) + lower = FLT_EPSILON; + } + + + if (LADSPA_IS_HINT_HAS_DEFAULT(hint_descriptor)) { + + bool valid = true; + + if (range_valid && LADSPA_IS_HINT_DEFAULT_MINIMUM(hint_descriptor)) { + normal = lower; + } else if (range_valid && 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 (range_valid && 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 (range_valid && 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 (range_valid && 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 { + valid = false; + } + + if (valid) + add_float(model, port, NS_LV2("default"), normal); + + } else { // No default hint + + if (range_valid && LADSPA_IS_HINT_BOUNDED_BELOW(hint_descriptor)) { + normal = lower; + add_float(model, port, NS_LV2("default"), normal); + } else if (range_valid && LADSPA_IS_HINT_BOUNDED_ABOVE(hint_descriptor)) { + normal = upper; + add_float(model, port, NS_LV2("default"), normal); + } + } +} + + void write_lv2_turtle(LADSPA_Descriptor* descriptor, const char* plugin_uri, const char* filename) { @@ -203,10 +307,6 @@ write_lv2_turtle(LADSPA_Descriptor* descriptor, const char* plugin_uri, const ch NS_LV2("index"), (int)i); - add_resource(model, port_node, - NS_RDF("type"), - NS_LV2("Port")); - if (LADSPA_IS_PORT_INPUT(port_descriptor)) add_resource(model, port_node, NS_RDF("type"), @@ -219,15 +319,17 @@ write_lv2_turtle(LADSPA_Descriptor* descriptor, const char* plugin_uri, const ch if (LADSPA_IS_PORT_AUDIO(port_descriptor)) add_resource(model, port_node, NS_RDF("type"), - NS_LV2("ControlPort")); + NS_LV2("AudioPort")); else add_resource(model, port_node, NS_RDF("type"), - NS_LV2("AudioPort")); + NS_LV2("ControlPort")); add_string(model, port_node, NS_LV2("name"), descriptor->PortNames[i]); + + add_port_range(descriptor, i, model, port_node); } librdf_serializer_serialize_model_to_file(serializer, filename, NULL, model); |