annotate vamp-support/PluginConfiguration.h @ 180:bd543e74a9bf

Correct the inspection of the JSON object in successful to look for both error and success objects, writing out an error string if neither are present. Revert error handling in readInput() for JSON.

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

/*
    Piper C++

    An API for audio analysis and feature extraction plugins.

    Centre for Digital Music, Queen Mary, University of London.
    Copyright 2006-2016 Chris Cannam and QMUL.
  
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    obtaining a copy of this software and associated documentation
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    of the Software, and to permit persons to whom the Software is
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    The above copyright notice and this permission notice shall be
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    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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    Except as contained in this notice, the names of the Centre for
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*/

#ifndef PIPER_PLUGIN_CONFIGURATION_H
#define PIPER_PLUGIN_CONFIGURATION_H

#include <vamp-hostsdk/Plugin.h>

#include <map>
#include <string>

namespace piper_vamp {

/**
 * \class PluginConfiguration
 * 
 * PluginConfiguration is a structure bundling together data that
 * affect the configuration of a plugin: parameter values, programs,
 * and initialisation settings. Although an interactive Vamp plugin
 * host may configure a plugin in stages, for example to take into
 * account that a plugin's preferred step and block size may change
 * when its parameters are changed, a batch host or a host supporting
 * store and recall of configurations may wish to keep all
 * configuration settings together.
 */
struct PluginConfiguration
{
    PluginConfiguration() : // invalid configuration by default
	channelCount(0), stepSize(0), blockSize(0) { }
	
    int channelCount;
    int stepSize;
    int blockSize;
    typedef std::map<std::string, float> ParameterMap;
    ParameterMap parameterValues;
    std::string currentProgram;

    static PluginConfiguration
    fromPlugin(Vamp::Plugin *p,
	       int channelCount,
	       int stepSize,
	       int blockSize) {
	
	PluginConfiguration c;
	
	c.channelCount = channelCount;
	c.stepSize = stepSize;
	c.blockSize = blockSize;

	Vamp::PluginBase::ParameterList params = p->getParameterDescriptors();
	for (Vamp::PluginBase::ParameterList::const_iterator i = params.begin();
	     i != params.end(); ++i) {
	    std::string pid = i->identifier;
	    c.parameterValues[pid] = p->getParameter(pid);
	}
	
	if (!p->getPrograms().empty()) {
	    c.currentProgram = p->getCurrentProgram();
	}

	return c;
    }
};

}

#endif