lcldec.c: change #if CONFIG_ZLIB to #if CONFIG_ZLIB_DECODER.

[ffmpeg] / libavutil / rc4.h

diff --git a/libavutil/rc4.h b/libavutil/rc4.h
index e4546e3e9d7b02c2bbf6f6c59ab5101c43306770..07223a5c9e93de90e5a59090e18c4103095024fa 100644 (file)
--- a/libavutil/rc4.h
+++ b/libavutil/rc4.h
@@ -18,9 +18,33 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef RC4_H
-#ifndef RC4_H
+#ifndef AVUTIL_RC4_H
+#define AVUTIL_RC4_H
 
-void ff_rc4_enc(const uint8_t *key, int keylen, uint8_t *data, int datalen);
+#include <stdint.h>
 
-#endif /* RC4_H */
+struct AVRC4 {
+    uint8_t state[256];
+    int x, y;
+};
+
+/**
+ * \brief Initializes an AVRC4 context.
+ *
+ * \param key_bits must be a multiple of 8
+ * \param decrypt 0 for encryption, 1 for decryption, currently has no effect
+ */
+int av_rc4_init(struct AVRC4 *d, const uint8_t *key, int key_bits, int decrypt);
+
+/**
+ * \brief Encrypts / decrypts using the RC4 algorithm.
+ *
+ * \param count number of bytes
+ * \param dst destination array, can be equal to src
+ * \param src source array, can be equal to dst, may be NULL
+ * \param iv not (yet) used for RC4, should be NULL
+ * \param decrypt 0 for encryption, 1 for decryption, not (yet) used
+ */
+void av_rc4_crypt(struct AVRC4 *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
+
+#endif /* AVUTIL_RC4_H */