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9cae7f9450
The rationale is the same as for the wrappers for inflateInit(), although the case for it is admittedly not so strong because there are less users of deflateInit(). Also remove an unnecessary inclusion of config.h in libavformat/protocols.c in order to trigger a request for reconfigure (which is needed for CONFIG_DEFLATE_WRAPPER to take effect). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/*
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* Wrappers for zlib
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* Copyright (C) 2022 Andreas Rheinhardt
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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_ZLIB_WRAPPER_H
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#define AVCODEC_ZLIB_WRAPPER_H
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#include <zlib.h>
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typedef struct FFZStream {
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z_stream zstream;
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int inited;
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} FFZStream;
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/**
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* Wrapper around inflateInit(). It initializes the fields that zlib
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* requires to be initialized before inflateInit().
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* In case of error it also returns an error message to the provided logctx;
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* in any case, it sets zstream->inited to indicate whether inflateInit()
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* succeeded.
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* @return Returns 0 on success or a negative error code on failure
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*/
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int ff_inflate_init(FFZStream *zstream, void *logctx);
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/**
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* Wrapper around inflateEnd(). It calls inflateEnd() iff
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* zstream->inited is set and resets zstream->inited.
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* It is therefore safe to be called even if
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* ff_inflate_init() has never been called on it (or errored out)
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* provided that the FFZStream (or just FFZStream.inited) has been zeroed.
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*/
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void ff_inflate_end(FFZStream *zstream);
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/**
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* Wrapper around deflateInit(). It works analogously to ff_inflate_init().
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*/
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int ff_deflate_init(FFZStream *zstream, int level, void *logctx);
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/**
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* Wrapper around deflateEnd(). It works analogously to ff_inflate_end().
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*/
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void ff_deflate_end(FFZStream *zstream);
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#endif /* AVCODEC_ZLIB_WRAPPER_H */
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