cannam@92: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@92: 
cannam@92: /*
cannam@92:     Vamp
cannam@92: 
cannam@92:     An API for audio analysis and feature extraction plugins.
cannam@92: 
cannam@92:     Centre for Digital Music, Queen Mary, University of London.
cannam@92:     Copyright 2006-2007 Chris Cannam and QMUL.
cannam@92:     This file by Mark Levy, Copyright 2007 QMUL.
cannam@92:   
cannam@92:     Permission is hereby granted, free of charge, to any person
cannam@92:     obtaining a copy of this software and associated documentation
cannam@92:     files (the "Software"), to deal in the Software without
cannam@92:     restriction, including without limitation the rights to use, copy,
cannam@92:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@92:     of the Software, and to permit persons to whom the Software is
cannam@92:     furnished to do so, subject to the following conditions:
cannam@92: 
cannam@92:     The above copyright notice and this permission notice shall be
cannam@92:     included in all copies or substantial portions of the Software.
cannam@92: 
cannam@92:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@92:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@92:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@92:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@92:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@92:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@92:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@92: 
cannam@92:     Except as contained in this notice, the names of the Centre for
cannam@92:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@92:     shall not be used in advertising or otherwise to promote the sale,
cannam@92:     use or other dealings in this Software without prior written
cannam@92:     authorization.
cannam@92: */
cannam@92: 
cannam@92: #ifndef _VAMP_PLUGIN_BUFFERING_ADAPTER_H_
cannam@92: #define _VAMP_PLUGIN_BUFFERING_ADAPTER_H_
cannam@92: 
cannam@92: #include "PluginWrapper.h"
cannam@92: 
cannam@92: namespace Vamp {
cannam@92: 	
cannam@92: namespace HostExt {
cannam@92: 		
cannam@92: /**
cannam@92:  * \class PluginBufferingAdapter PluginBufferingAdapter.h <vamp-sdk/hostext/PluginBufferingAdapter.h>
cannam@92:  *
cannam@92:  * PluginBufferingAdapter is a Vamp plugin adapter that allows plugins
cannam@92:  * to be used by a host supplying an audio stream in non-overlapping
cannam@92:  * buffers of arbitrary size.
cannam@92:  *
cannam@92:  * A host using PluginBufferingAdapter may ignore the preferred step
cannam@92:  * and block size reported by the plugin, and still expect the plugin
cannam@92:  * to run.  The value of blockSize and stepSize passed to initialise
cannam@92:  * should be the size of the buffer which the host will supply; the
cannam@92:  * stepSize should be equal to the blockSize.
cannam@92:  *
cannam@92:  * If the internal step size used for the plugin differs from that
cannam@92:  * supplied by the host, the adapter will modify the sample rate
cannam@92:  * specifications for the plugin outputs (setting them all to
cannam@92:  * VariableSampleRate) and set timestamps on the output features for
cannam@92:  * outputs that formerly used a different sample rate specification.
cannam@92:  * This is necessary in order to obtain correct time stamping.
cannam@92:  * 
cannam@92:  * In other respects, the PluginBufferingAdapter behaves identically
cannam@92:  * to the plugin that it wraps. The wrapped plugin will be deleted
cannam@92:  * when the wrapper is deleted.
cannam@92:  */
cannam@92: 		
cannam@92: class PluginBufferingAdapter : public PluginWrapper
cannam@92: {
cannam@92: public:
cannam@92:     PluginBufferingAdapter(Plugin *plugin); // I take ownership of plugin
cannam@92:     virtual ~PluginBufferingAdapter();
cannam@92:     
cannam@92:     bool initialise(size_t channels, size_t stepSize, size_t blockSize);
cannam@92: 
cannam@92:     size_t getPreferredStepSize() const;
cannam@92:     
cannam@92:     OutputList getOutputDescriptors() const;
cannam@92: 
cannam@104:     void reset();
cannam@104: 
cannam@92:     FeatureSet process(const float *const *inputBuffers, RealTime timestamp);
cannam@92:     
cannam@92:     FeatureSet getRemainingFeatures();
cannam@92:     
cannam@92: protected:
cannam@92:     class Impl;
cannam@92:     Impl *m_impl;
cannam@92: };
cannam@92:     
cannam@92: }
cannam@92: 
cannam@92: }
cannam@92: 
cannam@92: #endif