| /* |
| * 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 */ |