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ffmpeg / libavcodec / bytestream.h @ 2912e87a

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/*
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 * Bytestream functions
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 * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
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 *
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 * This file is part of Libav.
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 *
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 * Libav 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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 * Libav 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 Libav; 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_BYTESTREAM_H
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#define AVCODEC_BYTESTREAM_H
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#include <string.h>
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#define DEF_T(type, name, bytes, read, write)                             \
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static av_always_inline type bytestream_get_ ## name(const uint8_t **b){\
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    (*b) += bytes;\
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    return read(*b - bytes);\
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}\
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static av_always_inline void bytestream_put_ ##name(uint8_t **b, const type value){\
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    write(*b, value);\
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    (*b) += bytes;\
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}
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#define DEF(name, bytes, read, write) \
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    DEF_T(unsigned int, name, bytes, read, write)
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#define DEF64(name, bytes, read, write) \
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    DEF_T(uint64_t, name, bytes, read, write)
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DEF64(le64, 8, AV_RL64, AV_WL64)
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DEF  (le32, 4, AV_RL32, AV_WL32)
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DEF  (le24, 3, AV_RL24, AV_WL24)
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DEF  (le16, 2, AV_RL16, AV_WL16)
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DEF64(be64, 8, AV_RB64, AV_WB64)
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DEF  (be32, 4, AV_RB32, AV_WB32)
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DEF  (be24, 3, AV_RB24, AV_WB24)
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DEF  (be16, 2, AV_RB16, AV_WB16)
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DEF  (byte, 1, AV_RB8 , AV_WB8 )
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#undef DEF
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#undef DEF64
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#undef DEF_T
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static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
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{
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    memcpy(dst, *b, size);
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    (*b) += size;
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    return size;
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}
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static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
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{
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    memcpy(*b, src, size);
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    (*b) += size;
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}
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#endif /* AVCODEC_BYTESTREAM_H */