/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_PARSER_INTERNAL_H
#define AVCODEC_PARSER_INTERNAL_H

#include "libavutil/macros.h"
#include "codec_id.h"

#define EIGTH_ARG(a,b,c,d,e,f,g,h,...) h
#define NO_FAIL
// Expands to nothing if <= 7 args; induces compilation failure if not.
#define CHECK_FOR_TOO_MANY_IDS(...) AV_JOIN(EIGTH_ARG(__VA_ARGS__, NO, NO, NO, NO, NO, NO, NO, NO), _FAIL)

// For compatibility with MSVC's old, spec-incompliant preprocessor.
#define PASSTHROUGH(...) __VA_ARGS__
#define FIRST_SEVEN2(a,b,c,d,e,f,g,...) a,b,c,d,e,f,g
#define FIRST_SEVEN(...) PASSTHROUGH(FIRST_SEVEN2(__VA_ARGS__))
#define TIMES_SEVEN(a) a,a,a,a,a,a,a
#define PARSER_CODEC_LIST(...) CHECK_FOR_TOO_MANY_IDS(__VA_ARGS__) \
    .codec_ids = { FIRST_SEVEN(__VA_ARGS__, TIMES_SEVEN(AV_CODEC_ID_NONE)) }

#endif /* AVCODEC_PARSER_INTERNAL_H */