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/*
* Wrappers for zlib
* Copyright (C) 2022 Andreas Rheinhardt
*
* 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_ZLIB_WRAPPER_H
#define AVCODEC_ZLIB_WRAPPER_H
#include <zlib.h>
typedef struct FFZStream {
z_stream zstream;
int inited;
} FFZStream;
/**
* Wrapper around inflateInit(). It initializes the fields that zlib
* requires to be initialized before inflateInit().
* In case of error it also returns an error message to the provided logctx;
* in any case, it sets zstream->inited to indicate whether inflateInit()
* succeeded.
* @return Returns 0 on success or a negative error code on failure
*/
int ff_inflate_init(FFZStream *zstream, void *logctx);
/**
* Wrapper around inflateEnd(). It calls inflateEnd() iff
* zstream->inited is set and resets zstream->inited.
* It is therefore safe to be called even if
* ff_inflate_init() has never been called on it (or errored out)
* provided that the FFZStream (or just FFZStream.inited) has been zeroed.
*/
void ff_inflate_end(FFZStream *zstream);
/**
* Wrapper around deflateInit(). It works analogously to ff_inflate_init().
*/
int ff_deflate_init(FFZStream *zstream, int level, void *logctx);
/**
* Wrapper around deflateEnd(). It works analogously to ff_inflate_end().
*/
void ff_deflate_end(FFZStream *zstream);
#endif /* AVCODEC_ZLIB_WRAPPER_H */
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