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https://gitee.com/openharmony/third_party_ffmpeg
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ac090fa68c
They are essential to be able to use the utils without av_malloc() That is for example use with malloc(), memalign(), some other private allocation function, on the stack or others. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
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* copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
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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_AES_H
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#define AVUTIL_AES_H
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#include <stdint.h>
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#include "attributes.h"
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#include "version.h"
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/**
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* @defgroup lavu_aes AES
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* @ingroup lavu_crypto
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* @{
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*/
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extern const int av_aes_size;
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struct AVAES;
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/**
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* Allocate an AVAES context.
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*/
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struct AVAES *av_aes_alloc(void);
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/**
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* Initialize an AVAES context.
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* @param key_bits 128, 192 or 256
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* @param decrypt 0 for encryption, 1 for decryption
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*/
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int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
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/**
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* Encrypt or decrypt a buffer using a previously initialized context.
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* @param count number of 16 byte blocks
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* @param dst destination array, can be equal to src
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* @param src source array, can be equal to dst
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* @param iv initialization vector for CBC mode, if NULL then ECB will be used
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* @param decrypt 0 for encryption, 1 for decryption
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*/
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void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
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/**
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* @}
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*/
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#endif /* AVUTIL_AES_H */
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