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diff --git a/app/src/main/jni/ffmpeg-3.0.11/include/libavutil/des.h b/app/src/main/jni/ffmpeg-3.0.11/include/libavutil/des.h
new file mode 100644
index 0000000..4cf11f5
--- /dev/null
+++ b/app/src/main/jni/ffmpeg-3.0.11/include/libavutil/des.h
@@ -0,0 +1,77 @@
+/*
+ * DES encryption/decryption
+ * Copyright (c) 2007 Reimar Doeffinger
+ *
+ * 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 AVUTIL_DES_H
+#define AVUTIL_DES_H
+
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_des DES
+ * @ingroup lavu_crypto
+ * @{
+ */
+
+typedef struct AVDES {
+    uint64_t round_keys[3][16];
+    int triple_des;
+} AVDES;
+
+/**
+ * Allocate an AVDES context.
+ */
+AVDES *av_des_alloc(void);
+
+/**
+ * @brief Initializes an AVDES context.
+ *
+ * @param key_bits must be 64 or 192
+ * @param decrypt 0 for encryption/CBC-MAC, 1 for decryption
+ * @return zero on success, negative value otherwise
+ */
+int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt);
+
+/**
+ * @brief Encrypts / decrypts using the DES algorithm.
+ *
+ * @param count number of 8 byte blocks
+ * @param dst destination array, can be equal to src, must be 8-byte aligned
+ * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
+ * @param iv initialization vector for CBC mode, if NULL then ECB will be used,
+ *           must be 8-byte aligned
+ * @param decrypt 0 for encryption, 1 for decryption
+ */
+void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+
+/**
+ * @brief Calculates CBC-MAC using the DES algorithm.
+ *
+ * @param count number of 8 byte blocks
+ * @param dst destination array, can be equal to src, must be 8-byte aligned
+ * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
+ */
+void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DES_H */