comparison bits/PreservingPluginHandleMapper.h @ 31:b376ab0ce003

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+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Vampipe
+
+    Centre for Digital Music, Queen Mary, University of London.
+    Copyright 2006-2016 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 VAMPIPE_PRESERVING_PLUGIN_HANDLE_MAPPER_H
+#define VAMPIPE_PRESERVING_PLUGIN_HANDLE_MAPPER_H
+
+#include "PluginHandleMapper.h"
+
+namespace vampipe {
+
+class PreservingPluginHandleMapper : public PluginHandleMapper
+{
+public:
+    PreservingPluginHandleMapper() : m_handle(0), m_plugin(0) { }
+
+    virtual int32_t pluginToHandle(Vamp::Plugin *p) {
+	if (p == m_plugin) return m_handle;
+	else throw NotFound();
+    }
+
+    virtual Vamp::Plugin *handleToPlugin(int32_t h) {
+	m_handle = h;
+	m_plugin = reinterpret_cast<Vamp::Plugin *>(h);
+	return m_plugin;
+    }
+
+private:
+    int32_t m_handle;
+    Vamp::Plugin *m_plugin;
+};
+
+}
+
+#endif