annotate vamp-support/PreservingPluginOutputIdMapper.h @ 280:4b581a498981

Use override throughout

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

/*
    Piper C++

    Centre for Digital Music, Queen Mary, University of London.
    Copyright 2006-2016 Chris Cannam and QMUL.
  
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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
    included in all copies or substantial portions of the Software.

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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 PIPER_PRESERVING_PLUGIN_OUTPUT_ID_MAPPER_H
#define PIPER_PRESERVING_PLUGIN_OUTPUT_ID_MAPPER_H

#include "PluginOutputIdMapper.h"

#include <iostream>

namespace piper_vamp {

/**
 * A PluginOutputIdMapper that knows nothing about actual plugin IDs,
 * but that accepts any string as an argument to idToIndex, returns an
 * entirely invented index that is consistent for that string, and
 * maps back to the same string through indexToId.
 */
class PreservingPluginOutputIdMapper : public PluginOutputIdMapper
{
public:
    PreservingPluginOutputIdMapper() { }

    int idToIndex(std::string outputId) const noexcept override {
	int n = int(m_ids.size());
	int i = 0;
	while (i < n) {
	    if (outputId == m_ids[i]) {
		return i;
	    }
	    ++i;
	}
	m_ids.push_back(outputId);
	return i;
    }

    std::string indexToId(int index) const noexcept override {
        if (index < 0 || size_t(index) >= m_ids.size()) return "";
	return m_ids[index];
    }

private:
    mutable std::vector<std::string> m_ids;
};

}

#endif