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39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_PARSER_INTERNAL_H
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#define AVCODEC_PARSER_INTERNAL_H
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#include "libavutil/macros.h"
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#include "codec_id.h"
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#define EIGTH_ARG(a,b,c,d,e,f,g,h,...) h
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#define NO_FAIL
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// Expands to nothing if <= 7 args; induces compilation failure if not.
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#define CHECK_FOR_TOO_MANY_IDS(...) AV_JOIN(EIGTH_ARG(__VA_ARGS__, NO, NO, NO, NO, NO, NO, NO, NO), _FAIL)
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// For compatibility with MSVC's old, spec-incompliant preprocessor.
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#define PASSTHROUGH(...) __VA_ARGS__
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#define FIRST_SEVEN2(a,b,c,d,e,f,g,...) a,b,c,d,e,f,g
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#define FIRST_SEVEN(...) PASSTHROUGH(FIRST_SEVEN2(__VA_ARGS__))
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#define TIMES_SEVEN(a) a,a,a,a,a,a,a
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#define PARSER_CODEC_LIST(...) CHECK_FOR_TOO_MANY_IDS(__VA_ARGS__) \
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.codec_ids = { FIRST_SEVEN(__VA_ARGS__, TIMES_SEVEN(AV_CODEC_ID_NONE)) }
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#endif /* AVCODEC_PARSER_INTERNAL_H */
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