c@75: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
c@75: 
c@75: /*
c@75:     Piper C++
c@75: 
c@75:     Centre for Digital Music, Queen Mary, University of London.
c@75:     Copyright 2006-2016 Chris Cannam and QMUL.
c@75:   
c@75:     Permission is hereby granted, free of charge, to any person
c@75:     obtaining a copy of this software and associated documentation
c@75:     files (the "Software"), to deal in the Software without
c@75:     restriction, including without limitation the rights to use, copy,
c@75:     modify, merge, publish, distribute, sublicense, and/or sell copies
c@75:     of the Software, and to permit persons to whom the Software is
c@75:     furnished to do so, subject to the following conditions:
c@75: 
c@75:     The above copyright notice and this permission notice shall be
c@75:     included in all copies or substantial portions of the Software.
c@75: 
c@75:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
c@75:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
c@75:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
c@75:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
c@75:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
c@75:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
c@75:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
c@75: 
c@75:     Except as contained in this notice, the names of the Centre for
c@75:     Digital Music; Queen Mary, University of London; and Chris Cannam
c@75:     shall not be used in advertising or otherwise to promote the sale,
c@75:     use or other dealings in this Software without prior written
c@75:     authorization.
c@75: */
c@75: 
c@75: #ifndef PIPER_PRESERVING_PLUGIN_HANDLE_MAPPER_H
c@75: #define PIPER_PRESERVING_PLUGIN_HANDLE_MAPPER_H
c@75: 
c@75: #include "PluginHandleMapper.h"
c@75: #include "PreservingPluginOutputIdMapper.h"
c@75: 
c@75: #include <iostream>
c@75: 
c@97: namespace piper_vamp {
c@75: 
c@75: //!!! document -- this is a passthrough thing for a single plugin
c@75: //!!! handle only, it does not use actually valid Plugin pointers at
c@75: //!!! all
c@75: 
c@75: class PreservingPluginHandleMapper : public PluginHandleMapper
c@75: {
c@75: public:
c@75:     PreservingPluginHandleMapper() :
c@75:         m_handle(0),
c@75:         m_plugin(0),
c@75:         m_omapper(std::make_shared<PreservingPluginOutputIdMapper>()) { }
c@75: 
c@75:     virtual Handle pluginToHandle(Vamp::Plugin *p) const noexcept {
c@75:         if (!p) return INVALID_HANDLE;
c@75: 	if (p == m_plugin) return m_handle;
c@75: 	else {
c@75: 	    std::cerr << "PreservingPluginHandleMapper: p = " << p
c@75: 		      << " differs from saved m_plugin " << m_plugin
c@75: 		      << " (not returning saved handle " << m_handle << ")"
c@75: 		      << std::endl;
c@75:             return INVALID_HANDLE;
c@75: 	}
c@75:     }
c@75: 
c@75:     virtual Vamp::Plugin *handleToPlugin(Handle h) const noexcept {
c@75:         if (h == INVALID_HANDLE) return nullptr;
c@75: 	m_handle = h;
c@75: 	m_plugin = reinterpret_cast<Vamp::Plugin *>(h);
c@75: 	return m_plugin;
c@75:     }
c@75: 
c@75:     virtual const std::shared_ptr<PluginOutputIdMapper> pluginToOutputIdMapper
c@75:     (Vamp::Plugin *p) const noexcept {
c@75:         if (!p) return {};
c@75:         return m_omapper;
c@75:     }
c@75:         
c@75:     virtual const std::shared_ptr<PluginOutputIdMapper> handleToOutputIdMapper
c@75:     (Handle h) const noexcept {
c@75:         if (h == INVALID_HANDLE) return {};
c@75:         return m_omapper;
c@75:     }
c@75:     
c@75: private:
c@75:     mutable Handle m_handle;
c@75:     mutable Vamp::Plugin *m_plugin;
c@75:     std::shared_ptr<PreservingPluginOutputIdMapper> m_omapper;
c@75: };
c@75: 
c@75: }
c@75: 
c@75: #endif