annotate transform/FeatureExtractionPluginTransform.h @ 52:527598e2fa10

* Handle generator transforms (plugins whose channel count isn't dependent on
  number of audio inputs, as they have none)
* Be less keen to suspend writing FFT data in spectrogram repaint -- only do it
  if we find we actually need to query the FFT data (i.e. we aren't repainting
  an area that hasn't been generated at all yet)

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _FEATURE_EXTRACTION_PLUGIN_TRANSFORM_H_
#define _FEATURE_EXTRACTION_PLUGIN_TRANSFORM_H_

#include "PluginTransform.h"

class DenseTimeValueModel;

class FeatureExtractionPluginTransform : public PluginTransform
{
public:
    FeatureExtractionPluginTransform(Model *inputModel,
				     QString plugin,
                                     const ExecutionContext &context,
                                     QString configurationXml = "",
				     QString outputName = "");
    virtual ~FeatureExtractionPluginTransform();

protected:
    virtual void run();

    Vamp::Plugin *m_plugin;
    Vamp::Plugin::OutputDescriptor *m_descriptor;
    int m_outputFeatureNo;

    void addFeature(size_t blockFrame,
		    const Vamp::Plugin::Feature &feature);

    void setCompletion(int);

    void getFrames(int channel, int channelCount,
                   long startFrame, long size, float *buffer);

    // just casts
    DenseTimeValueModel *getInput();
    template <typename ModelClass> ModelClass *getOutput() {
	ModelClass *mc = dynamic_cast<ModelClass *>(m_output);
	if (!mc) {
	    std::cerr << "FeatureExtractionPluginTransform::getOutput: Output model not conformable" << std::endl;
	}
	return mc;
    }
};

#endif