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61 lines
2.0 KiB
61 lines
2.0 KiB
/* |
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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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