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78 lines
2.2 KiB
78 lines
2.2 KiB
/* |
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* Copyright (C) 2013 Reimar Döffinger <Reimar.Doeffinger@gmx.de> |
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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 AVUTIL_HASH_H |
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#define AVUTIL_HASH_H |
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#include <stdint.h> |
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struct AVHashContext; |
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/** |
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* Allocate a hash context for the algorithm specified by name. |
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* |
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* @return >= 0 for success, a negative error code for failure |
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* @note The context is not initialized, you must call av_hash_init(). |
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*/ |
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int av_hash_alloc(struct AVHashContext **ctx, const char *name); |
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/** |
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* Get the names of available hash algorithms. |
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* |
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* This function can be used to enumerate the algorithms. |
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* |
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* @param i index of the hash algorithm, starting from 0 |
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* @return a pointer to a static string or NULL if i is out of range |
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*/ |
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const char *av_hash_names(int i); |
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/** |
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* Get the name of the algorithm corresponding to the given hash context. |
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*/ |
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const char *av_hash_get_name(const struct AVHashContext *ctx); |
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/** |
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* Get the size of the resulting hash value in bytes. |
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* |
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* The pointer passed to av_hash_final have space for at least this many bytes. |
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*/ |
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int av_hash_get_size(const struct AVHashContext *ctx); |
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/** |
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* Initialize or reset a hash context. |
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*/ |
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void av_hash_init(struct AVHashContext *ctx); |
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/** |
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* Update a hash context with additional data. |
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*/ |
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void av_hash_update(struct AVHashContext *ctx, const uint8_t *src, int len); |
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/** |
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* Finalize a hash context and compute the actual hash value. |
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*/ |
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void av_hash_final(struct AVHashContext *ctx, uint8_t *dst); |
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/** |
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* Free hash context. |
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*/ |
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void av_hash_freep(struct AVHashContext **ctx); |
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#endif /* AVUTIL_HASH_H */
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