diff vamp-support/PluginProgramParameters.h @ 287:09753ad777db

Add support for ProgramParameters. In theory this means we can select a program and then re-query the plugin's parameters and get the right values back, just as would happen if we were working with the remote extractor directly as a local Vamp plugin.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vamp-support/PluginProgramParameters.h	Tue Apr 07 15:56:02 2020 +0100
@@ -0,0 +1,93 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Piper C++
+
+    An API for audio analysis and feature extraction plugins.
+
+    Centre for Digital Music, Queen Mary, University of London.
+    Copyright 2006-2019 Chris Cannam and QMUL.
+  
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation
+    files (the "Software"), to deal in the Software without
+    restriction, including without limitation the rights to use, copy,
+    modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
+    ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    Except as contained in this notice, the names of the Centre for
+    Digital Music; Queen Mary, University of London; and Chris Cannam
+    shall not be used in advertising or otherwise to promote the sale,
+    use or other dealings in this Software without prior written
+    authorization.
+*/
+
+#ifndef PIPER_PLUGIN_PROGRAM_PARAMETERS_H
+#define PIPER_PLUGIN_PROGRAM_PARAMETERS_H
+
+#include <vamp-hostsdk/Plugin.h>
+
+#include <map>
+#include <string>
+
+namespace piper_vamp {
+
+/**
+ * \class PluginProgramParameters
+ * 
+ * PluginProgramParameters is a structure mapping from program names
+ * to the parameter settings associated with those programs.
+ */
+struct PluginProgramParameters
+{
+    std::map<std::string, std::map<std::string, float>> programParameters;
+
+    /**
+     * Extract the program parameters from the given plugin (without
+     * retaining any persistent reference to the plugin itself).
+     */
+    static PluginProgramParameters
+    fromPlugin(Vamp::Plugin *p, const PluginConfiguration &defaultConfiguration) {
+
+        auto programs = p->getPrograms();
+        if (programs.empty()) return {};
+
+        PluginProgramParameters pp;
+
+        for (auto program: programs) {
+
+            p->selectProgram(program);
+
+            for (auto param: defaultConfiguration.parameterValues) {
+                auto id = param.first;
+                pp.programParameters[program][id] = p->getParameter(id);
+            }
+        }
+
+        if (defaultConfiguration.currentProgram != "") {
+            p->selectProgram(defaultConfiguration.currentProgram);
+        }
+
+        for (auto param: defaultConfiguration.parameterValues) {
+            p->setParameter(param.first, param.second);
+        }
+
+        return pp;
+    }
+};
+
+}
+
+#endif