annotate vamp-hostsdk/PluginConfiguration.h @ 445:7f7a10bcaff1 vampipe

Single or double-precision FFTs (double in the default build), not both

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

/*
    Vamp

    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.
  
    Permission is hereby granted, free of charge, to any person
    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
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be
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    Except as contained in this notice, the names of the Centre for
    Digital Music; Queen Mary, University of London; and Chris Cannam
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*/

#ifndef VAMP_PLUGIN_CONFIGURATION_H
#define VAMP_PLUGIN_CONFIGURATION_H

#include "hostguard.h"

#include "Plugin.h"

#include <map>
#include <string>

_VAMP_SDK_HOSTSPACE_BEGIN(PluginConfiguration.h)

namespace Vamp {

namespace HostExt {

/**
 * \class PluginConfiguration PluginConfiguration.h <vamp-hostsdk/PluginConfiguration.h>
 * 
 * Vamp::HostExt::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.
 *
 * \note This class was introduced in version 2.7 of the Vamp plugin
 * SDK.
 */
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(Plugin *p,
	       int channelCount,
	       int stepSize,
	       int blockSize) {
	
	PluginConfiguration c;
	
	c.channelCount = channelCount;
	c.stepSize = stepSize;
	c.blockSize = blockSize;

	PluginBase::ParameterList params = p->getParameterDescriptors();
	for (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;
    }
};

}

}

_VAMP_SDK_HOSTSPACE_END(PluginConfiguration.h)

#endif