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Diffstat (limited to 'muse/synti/simpledrums/ssplugin.cpp')
| -rw-r--r-- | muse/synti/simpledrums/ssplugin.cpp | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/muse/synti/simpledrums/ssplugin.cpp b/muse/synti/simpledrums/ssplugin.cpp new file mode 100644 index 00000000..292c6029 --- /dev/null +++ b/muse/synti/simpledrums/ssplugin.cpp @@ -0,0 +1,459 @@ +// +// C++ Implementation: plugin +// +// Description: +// +// +// (C) Copyright 2000 Werner Schweer (ws@seh.de) +// Additions/modifications: Mathias Lundgren <lunar_shuttle@users.sf.net>, (C) 2004 +// Copyright: See COPYING file that comes with this distribution +// +// + +#include <stdlib.h> +#include <unistd.h> +#include <dlfcn.h> +#include "ssplugin.h" +#include "common.h" + +PluginList plugins; + + +Plugin::Plugin(const QFileInfo* f) + : fi(*f) + { + } + +//--------------------------------------------------------- +// loadPluginLib +//--------------------------------------------------------- + +static void loadPluginLib(QFileInfo* fi) + { + SS_TRACE_IN + if (SS_DEBUG_LADSPA) { + printf("loadPluginLib: %s\n", fi->fileName().latin1()); + } + void* handle = dlopen(fi->filePath().ascii(), RTLD_NOW); + if (handle == 0) { + fprintf(stderr, "dlopen(%s) failed: %s\n", + fi->filePath().ascii(), dlerror()); + return; + } + LADSPA_Descriptor_Function ladspa = (LADSPA_Descriptor_Function)dlsym(handle, "ladspa_descriptor"); + + if (!ladspa) { + const char *txt = dlerror(); + if (txt) { + fprintf(stderr, + "Unable to find ladspa_descriptor() function in plugin " + "library file \"%s\": %s.\n" + "Are you sure this is a LADSPA plugin file?\n", + fi->filePath().ascii(), + txt); + exit(1); + } + } + const LADSPA_Descriptor* descr; + for (int i = 0;; ++i) { + descr = ladspa(i); + if (descr == NULL) + break; + plugins.push_back(new LadspaPlugin(fi, ladspa, descr)); + } + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// loadPluginDir +//--------------------------------------------------------- + +static void loadPluginDir(const QString& s) + { + SS_TRACE_IN + QDir pluginDir(s, QString("*.so"), QDir::Files); + if (pluginDir.exists()) { + const QFileInfoList* list = pluginDir.entryInfoList(); + QFileInfoListIterator it(*list); + QFileInfo* fi; + while((fi = it.current())) { + loadPluginLib(fi); + ++it; + } + } + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// initPlugins +// search for LADSPA plugins +//--------------------------------------------------------- + +void SS_initPlugins() + { + SS_TRACE_IN + //loadPluginDir(museGlobalLib + QString("/plugins")); + + const char* ladspaPath = getenv("LADSPA_PATH"); + if (ladspaPath == 0) + ladspaPath = "/usr/local/lib64/ladspa:/usr/lib64/ladspa:/usr/local/lib/ladspa:/usr/lib/ladspa"; + + const char* p = ladspaPath; + while (*p != '\0') { + const char* pe = p; + while (*pe != ':' && *pe != '\0') + pe++; + + int n = pe - p; + if (n) { + char* buffer = new char[n + 1]; + strncpy(buffer, p, n); + buffer[n] = '\0'; + loadPluginDir(QString(buffer)); + delete[] buffer; + } + p = pe; + if (*p == ':') + p++; + } + SS_TRACE_OUT + } + + +//--------------------------------------------------------- +// LadspaPlugin +//--------------------------------------------------------- + +LadspaPlugin::LadspaPlugin(const QFileInfo* f, + const LADSPA_Descriptor_Function ldf, + const LADSPA_Descriptor* d) + : Plugin(f), ladspa(ldf), plugin(d) + { + SS_TRACE_IN + _inports = 0; + _outports = 0; + _parameter = 0; + handle = 0; + active = false; + controls = 0; + inputs = 0; + outputs = 0; + + for (unsigned k = 0; k < plugin->PortCount; ++k) { + LADSPA_PortDescriptor pd = d->PortDescriptors[k]; + static const int CI = LADSPA_PORT_CONTROL | LADSPA_PORT_INPUT; + if ((pd & CI) == CI) { + ++_parameter; + pIdx.push_back(k); + } + else if (pd & LADSPA_PORT_INPUT) { + ++_inports; + iIdx.push_back(k); + } + else if (pd & LADSPA_PORT_OUTPUT) { + ++_outports; + oIdx.push_back(k); + } + } + + /*if (SS_DEBUG_LADSPA) { + printf("Label: %s\tLib: %s\tPortCount: %d\n", this->label().latin1(), this->lib().latin1(), plugin->PortCount); + printf("LADSPA_PORT_CONTROL|LADSPA_PORT_INPUT: %d\t", pIdx.size()); + printf("Input ports: %d\t", iIdx.size()); + printf("Output ports: %d\n\n", oIdx.size()); + }*/ + + LADSPA_Properties properties = plugin->Properties; + _inPlaceCapable = !LADSPA_IS_INPLACE_BROKEN(properties); + if (_inports != _outports) + _inPlaceCapable = false; + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// ~LadspaPlugin +//--------------------------------------------------------- +LadspaPlugin::~LadspaPlugin() + { + SS_TRACE_IN + if (active) { + stop(); + } + if (handle) { + SS_DBG_LADSPA2("Cleaning up ", this->label().latin1()); + plugin->cleanup(handle); + } + + //Free ports: + if (controls) + delete controls; + if (inputs) + delete inputs; + if (outputs) + delete outputs; + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// instantiate +//--------------------------------------------------------- + +bool LadspaPlugin::instantiate() + { + bool success = false; + handle = plugin->instantiate(plugin, SS_samplerate); + success = (handle != NULL); + if (success) + SS_DBG_LADSPA2("Plugin instantiated", label().latin1()); + return success; + } + +//--------------------------------------------------------- +// start +// activate and connect control ports +//--------------------------------------------------------- + +bool LadspaPlugin::start() + { + SS_TRACE_IN + if (handle) { + if (plugin->activate) { + plugin->activate(handle); + SS_DBG_LADSPA("Plugin activated"); + } + active = true; + } + else { + SS_DBG_LADSPA("Error trying to activate plugin - plugin not instantiated!"); + SS_TRACE_OUT + return false; + } + + //Connect ports: + controls = new Port[_parameter]; + + for (int k = 0; k < _parameter; ++k) { + double val = defaultValue(k); + controls[k].val = val; + plugin->connect_port(handle, pIdx[k], &controls[k].val); + } + + outputs = new Port[_outports]; + inputs = new Port[_inports]; + + SS_TRACE_OUT + return true; + } + +//--------------------------------------------------------- +// stop +// deactivate +//--------------------------------------------------------- +void LadspaPlugin::stop() + { + SS_TRACE_IN + if (handle) { + SS_DBG_LADSPA2("Trying to stop plugin", label().latin1()); + if (plugin->deactivate) { + SS_DBG_LADSPA2("Deactivating ", label().latin1()); + plugin->deactivate(handle); + active = false; + } + } + else + SS_DBG_LADSPA("Warning - tried to stop plugin, but plugin was never started...\n"); + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// range +//--------------------------------------------------------- + +void LadspaPlugin::range(int i, float* min, float* max) const + { + SS_TRACE_IN + i = pIdx[i]; + LADSPA_PortRangeHint range = plugin->PortRangeHints[i]; + LADSPA_PortRangeHintDescriptor desc = range.HintDescriptor; + if (desc & LADSPA_HINT_TOGGLED) { + *min = 0.0; + *max = 1.0; + return; + } + float m = 1.0; + if (desc & LADSPA_HINT_SAMPLE_RATE) + m = (float) SS_samplerate; + + if (desc & LADSPA_HINT_BOUNDED_BELOW) + *min = range.LowerBound * m; + else + *min = 0.0; + if (desc & LADSPA_HINT_BOUNDED_ABOVE) + *max = range.UpperBound * m; + else + *max = 1.0; + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// defaultValue +//--------------------------------------------------------- + +float LadspaPlugin::defaultValue(int k) const + { + SS_TRACE_IN + k = pIdx[k]; + LADSPA_PortRangeHint range = plugin->PortRangeHints[k]; + LADSPA_PortRangeHintDescriptor rh = range.HintDescriptor; + double val = 1.0; + if (LADSPA_IS_HINT_DEFAULT_MINIMUM(rh)) + val = range.LowerBound; + else if (LADSPA_IS_HINT_DEFAULT_LOW(rh)) + if (LADSPA_IS_HINT_LOGARITHMIC(range.HintDescriptor)) + val = exp(fast_log10(range.LowerBound) * .75 + + log(range.UpperBound) * .25); + else + val = range.LowerBound*.75 + range.UpperBound*.25; + else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(rh)) + if (LADSPA_IS_HINT_LOGARITHMIC(range.HintDescriptor)) + val = exp(log(range.LowerBound) * .5 + + log(range.UpperBound) * .5); + else + val = range.LowerBound*.5 + range.UpperBound*.5; + else if (LADSPA_IS_HINT_DEFAULT_HIGH(rh)) + if (LADSPA_IS_HINT_LOGARITHMIC(range.HintDescriptor)) + val = exp(log(range.LowerBound) * .25 + + log(range.UpperBound) * .75); + else + val = range.LowerBound*.25 + range.UpperBound*.75; + else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(rh)) + val = range.UpperBound; + else if (LADSPA_IS_HINT_DEFAULT_0(rh)) + val = 0.0; + else if (LADSPA_IS_HINT_DEFAULT_1(rh)) + val = 1.0; + else if (LADSPA_IS_HINT_DEFAULT_100(rh)) + val = 100.0; + else if (LADSPA_IS_HINT_DEFAULT_440(rh)) + val = 440.0; + SS_TRACE_OUT + return val; + } + +//--------------------------------------------------------- +// find +//--------------------------------------------------------- + +Plugin* PluginList::find(const QString& file, const QString& name) + { + SS_TRACE_IN + for (iPlugin i = begin(); i != end(); ++i) { + if ((file == (*i)->lib()) && (name == (*i)->label())) { + SS_TRACE_OUT + return *i; + } + } + printf("Plugin <%s> not found\n", name.latin1()); + SS_TRACE_OUT + return 0; + } + +//--------------------------------------------------------- +// connectInport +//--------------------------------------------------------- +void LadspaPlugin::connectInport(int k, LADSPA_Data* datalocation) + { + SS_TRACE_IN + plugin->connect_port(handle, iIdx[k], datalocation); + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// connectOutport +//--------------------------------------------------------- +void LadspaPlugin::connectOutport(int k, LADSPA_Data* datalocation) + { + SS_TRACE_IN + plugin->connect_port(handle, oIdx[k], datalocation); + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// process +//--------------------------------------------------------- +void LadspaPlugin::process(unsigned long frames) + { + plugin->run(handle, frames); + } + +//--------------------------------------------------------- +// setParam +//--------------------------------------------------------- + +void LadspaPlugin::setParam(int k, float val) + { + SS_TRACE_IN + controls[k].val = val; + SS_TRACE_OUT + } + +//--------------------------------------------------------- +// getGuiControlValue +// scale control value to gui-slider/checkbox representation +//--------------------------------------------------------- + +int LadspaPlugin::getGuiControlValue(int param) const + { + SS_TRACE_IN + float val = getControlValue(param); + float min, max; + range(param, &min, &max); + int intval; + if (isLog(param)) { + intval = SS_map_logdomain2pluginparam(logf(val/(max - min) + min)); + } + else if (isBool(param)) { + intval = (int) val; + } + else { + float scale = SS_PLUGIN_PARAM_MAX / (max - min); + intval = (int) ((val - min) * scale); + } + SS_TRACE_OUT + return intval; + } + +//--------------------------------------------------------- +// convertGuiControlValue +// scale control value to gui-slider/checkbox representation +//--------------------------------------------------------- + +float LadspaPlugin::convertGuiControlValue(int parameter, int val) const + { + SS_TRACE_IN + float floatval = 0; + float min, max; + range(parameter, &min, &max); + + if (isLog(parameter)) { + if (val > 0) { + float logged = SS_map_pluginparam2logdomain(val); + float e = expf(logged) * (max - min); + e+=min; + floatval = e; + } + } + else if (isBool(parameter)) { + floatval = (float) val; + } + else if (isInt(parameter)) { + float scale = (max - min) / SS_PLUGIN_PARAM_MAX; + floatval = (float) round((((float) val) * scale) + min); + } + else { + float scale = (max - min) / SS_PLUGIN_PARAM_MAX; + floatval = (((float) val) * scale) + min; + } + SS_TRACE_OUT + return floatval; + } |