/*
 * Copyright (C) 2006-2019 Christopho, Solarus - http://www.solarus-games.org
 *
 * Solarus 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 3 of the License, or
 * (at your option) any later version.
 *
 * Solarus 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. If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef SOLARUS_SPC_DECODER_H
#define SOLARUS_SPC_DECODER_H

#include <spc.h>
#include <cstddef>  // size_t
#include <cstdint>
#include <memory>

namespace Solarus {

/**
 * \brief Encapsulates the SPC music decoding.
 *
 * This class allows the Music class to be independent of the SPC library.
 * To decode SPC music files, the code of the Snes_SPC library is used.
 * Snes_SPC is a recent SPC decoding library that exists in two versions:
 * - a fast version, that renders music with a very nice quality;
 * - a highly accurate version, that renders music with a better accuracy, but about three times slower.
 * The source code of Solarus include the fast version of Snes_SPC, which I recommend
 * since the sound generated is good enough.
 */
class SpcDecoder {

  public:

    SpcDecoder();

    void load(int16_t* sound_data, size_t sound_size);
    void decode(int16_t* decoded_data, int nb_samples);

  private:

    struct SNES_SPC_Deleter {
      void operator()(SNES_SPC* snes_spc_manager) {
        spc_delete(snes_spc_manager);
      }
    };

    struct SPC_Filter_Deleter {
      void operator()(SPC_Filter* snes_spc_filter) {
        spc_filter_delete(snes_spc_filter);
      }
    };

    // Snes_SPC specific data
    std::unique_ptr<SNES_SPC, SNES_SPC_Deleter>
        snes_spc_manager;                             /**< the snes_spc object encapsulated */
    std::unique_ptr<SPC_Filter, SPC_Filter_Deleter>
        snes_spc_filter;                              /**< the snes_spc filter object */

};

}

#endif
