diff vamp-support/PreservingPluginHandleMapper.h @ 75:81e1c48e97f9

Rearrange and rename to Piper C++ structure

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vamp-support/PreservingPluginHandleMapper.h	Mon Oct 10 16:31:09 2016 +0100
@@ -0,0 +1,96 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Piper C++
+
+    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 PIPER_PRESERVING_PLUGIN_HANDLE_MAPPER_H
+#define PIPER_PRESERVING_PLUGIN_HANDLE_MAPPER_H
+
+#include "PluginHandleMapper.h"
+#include "PreservingPluginOutputIdMapper.h"
+
+#include <iostream>
+
+namespace piper {
+
+//!!! document -- this is a passthrough thing for a single plugin
+//!!! handle only, it does not use actually valid Plugin pointers at
+//!!! all
+
+class PreservingPluginHandleMapper : public PluginHandleMapper
+{
+public:
+    PreservingPluginHandleMapper() :
+        m_handle(0),
+        m_plugin(0),
+        m_omapper(std::make_shared<PreservingPluginOutputIdMapper>()) { }
+
+    virtual Handle pluginToHandle(Vamp::Plugin *p) const noexcept {
+        if (!p) return INVALID_HANDLE;
+	if (p == m_plugin) return m_handle;
+	else {
+	    std::cerr << "PreservingPluginHandleMapper: p = " << p
+		      << " differs from saved m_plugin " << m_plugin
+		      << " (not returning saved handle " << m_handle << ")"
+		      << std::endl;
+            return INVALID_HANDLE;
+	}
+    }
+
+    virtual Vamp::Plugin *handleToPlugin(Handle h) const noexcept {
+        if (h == INVALID_HANDLE) return nullptr;
+	m_handle = h;
+	m_plugin = reinterpret_cast<Vamp::Plugin *>(h);
+	return m_plugin;
+    }
+
+    virtual const std::shared_ptr<PluginOutputIdMapper> pluginToOutputIdMapper
+    (Vamp::Plugin *p) const noexcept {
+        if (!p) return {};
+        return m_omapper;
+    }
+        
+    virtual const std::shared_ptr<PluginOutputIdMapper> handleToOutputIdMapper
+    (Handle h) const noexcept {
+        if (h == INVALID_HANDLE) return {};
+        return m_omapper;
+    }
+    
+private:
+    mutable Handle m_handle;
+    mutable Vamp::Plugin *m_plugin;
+    std::shared_ptr<PreservingPluginOutputIdMapper> m_omapper;
+};
+
+}
+
+#endif