Lv2Options.h

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/*
 * Lv2Options.h - Lv2Options class
 *
 * Copyright (c) 2020-2020 Johannes Lorenz <jlsf2013$users.sourceforge.net, $=@>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
#ifndef LMMS_LV2_OPTIONS_H
#define LMMS_LV2_OPTIONS_H
 
#include "lmmsconfig.h"
 
#ifdef LMMS_HAVE_LV2
 
#include <cstdint>
#include <lv2/options/options.h>
#include <lv2/urid/urid.h>
#include <map>
#include <memory>
#include <set>
#include <vector>
 
#include "Engine.h"
#include "Lv2Manager.h"
#include "Lv2UridCache.h"
 
namespace lmms
{

class Lv2Options
{
public:
    static bool isOptionSupported(LV2_URID key);
    static void supportOption(LV2_URID key);

    template<typename Opt, typename Arg>
    void initOption(Lv2UridCache::Id key, Arg&& value,
            LV2_Options_Context context = LV2_OPTIONS_INSTANCE,
            std::uint32_t subject = 0)
    {
        const Lv2UridCache& cache = Engine::getLv2Manager()->uridCache();
        initOption(cache[key], sizeof(Opt), cache[Lv2UridCache::IdForType<Opt>::value],
            std::make_shared<Opt>(std::forward<Arg>(value)), context, subject);
    }

    void createOptionVectors();
    const LV2_Options_Option* feature() const
    {
        return m_options.data();
    }
 
    void clear();
 
private:
    void initOption(LV2_URID key,
        uint32_t size,
        LV2_URID type,
        std::shared_ptr<void> value,
        LV2_Options_Context context = LV2_OPTIONS_INSTANCE,
        uint32_t subject = 0);
    static std::set<LV2_URID> s_supportedOptions;
    std::map<LV2_URID, LV2_Options_Option> m_optionByUrid;
    std::vector<LV2_Options_Option> m_options;
    std::map<LV2_URID, std::shared_ptr<void>> m_optionValues;
};
 
 
} // namespace lmms
 
#endif // LMMS_HAVE_LV2
 
#endif // LMMS_LV2_OPTIONS_H