cannam@97: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@97: 
cannam@97: /*
cannam@97:     Vamp
cannam@97: 
cannam@97:     An API for audio analysis and feature extraction plugins.
cannam@97: 
cannam@97:     Centre for Digital Music, Queen Mary, University of London.
cannam@97:     Copyright 2006 Chris Cannam.
cannam@97:   
cannam@97:     Permission is hereby granted, free of charge, to any person
cannam@97:     obtaining a copy of this software and associated documentation
cannam@97:     files (the "Software"), to deal in the Software without
cannam@97:     restriction, including without limitation the rights to use, copy,
cannam@97:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@97:     of the Software, and to permit persons to whom the Software is
cannam@97:     furnished to do so, subject to the following conditions:
cannam@97: 
cannam@97:     The above copyright notice and this permission notice shall be
cannam@97:     included in all copies or substantial portions of the Software.
cannam@97: 
cannam@97:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@97:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@97:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@97:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@97:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@97:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@97:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@97: 
cannam@97:     Except as contained in this notice, the names of the Centre for
cannam@97:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@97:     shall not be used in advertising or otherwise to promote the sale,
cannam@97:     use or other dealings in this Software without prior written
cannam@97:     authorization.
cannam@97: */
cannam@97: 
cannam@97: #ifndef _VAMP_PLUGIN_ADAPTER_H_
cannam@97: #define _VAMP_PLUGIN_ADAPTER_H_
cannam@97: 
cannam@97: #include <map>
cannam@97: #include <vamp/vamp.h>
cannam@97: 
cannam@97: #include "Plugin.h"
cannam@97: 
cannam@97: #include "plugguard.h"
cannam@97: _VAMP_SDK_PLUGSPACE_BEGIN(PluginAdapter.h)
cannam@97: 
cannam@97: namespace Vamp {
cannam@97: 
cannam@97: /**
cannam@97:  * \class PluginAdapterBase PluginAdapter.h <vamp-sdk/PluginAdapter.h>
cannam@97:  * 
cannam@97:  * PluginAdapter and PluginAdapterBase provide a wrapper class that a
cannam@97:  * plugin library can use to make its C++ Vamp::Plugin objects
cannam@97:  * available through the Vamp C API.
cannam@97:  * 
cannam@97:  * Almost all Vamp plugin libraries will want to make use of this.  To
cannam@97:  * do so, all they need to do is declare a PluginAdapter<T> for each
cannam@97:  * plugin class T in their library.  It's very simple, and you need to
cannam@97:  * know absolutely nothing about how it works in order to use it.
cannam@97:  * Just cut and paste from an existing plugin's discovery function.
cannam@97:  * \see vampGetPluginDescriptor
cannam@97:  */
cannam@97: 
cannam@97: class PluginAdapterBase
cannam@97: {
cannam@97: public:
cannam@97:     virtual ~PluginAdapterBase();
cannam@97: 
cannam@97:     /**
cannam@97:      * Return a VampPluginDescriptor describing the plugin that is
cannam@97:      * wrapped by this adapter.
cannam@97:      */
cannam@97:     const VampPluginDescriptor *getDescriptor();
cannam@97: 
cannam@97: protected:
cannam@97:     PluginAdapterBase();
cannam@97: 
cannam@97:     virtual Plugin *createPlugin(float inputSampleRate) = 0;
cannam@97: 
cannam@97:     class Impl;
cannam@97:     Impl *m_impl;
cannam@97: };
cannam@97: 
cannam@97: /**
cannam@97:  * \class PluginAdapter PluginAdapter.h <vamp-sdk/PluginAdapter.h>
cannam@97:  * 
cannam@97:  * PluginAdapter turns a PluginAdapterBase into a specific wrapper for
cannam@97:  * a particular plugin implementation.
cannam@97:  *
cannam@97:  * See PluginAdapterBase.
cannam@97:  */
cannam@97: 
cannam@97: template <typename P>
cannam@97: class PluginAdapter : public PluginAdapterBase
cannam@97: {
cannam@97: public:
cannam@97:     PluginAdapter() : PluginAdapterBase() { }
cannam@97:     virtual ~PluginAdapter() { }
cannam@97: 
cannam@97: protected:
cannam@97:     Plugin *createPlugin(float inputSampleRate) {
cannam@97:         P *p = new P(inputSampleRate);
cannam@97:         Plugin *plugin = dynamic_cast<Plugin *>(p);
cannam@97:         if (!plugin) {
cannam@97:             std::cerr << "ERROR: PluginAdapter::createPlugin: "
cannam@97:                       << "Template type is not a plugin!"
cannam@97:                       << std::endl;
cannam@97:             delete p;
cannam@97:             return 0;
cannam@97:         }
cannam@97:         return plugin;
cannam@97:     }
cannam@97: };
cannam@97:     
cannam@97: }
cannam@97: 
cannam@97: _VAMP_SDK_PLUGSPACE_END(PluginAdapter.h)
cannam@97: 
cannam@97: #endif
cannam@97: