/*
  * LZO 1x decompression
  * copyright (c) 2006 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_LZO_H
 #define AVUTIL_LZO_H

 #include <stdint.h>
 

 /** \defgroup errflags Error flags returned by av_lzo1x_decode
   * \{ */
 //! end of the input buffer reached before decoding finished

 #define AV_LZO_INPUT_DEPLETED 1

 //! decoded data did not fit into output buffer

 #define AV_LZO_OUTPUT_FULL 2

 //! a reference to previously decoded data was wrong

 #define AV_LZO_INVALID_BACKPTR 4

 //! a non-specific error in the compressed bitstream

 #define AV_LZO_ERROR 8

 /** \} */

 #define AV_LZO_INPUT_PADDING 8
 #define AV_LZO_OUTPUT_PADDING 12

 /**
  * \brief Decodes LZO 1x compressed data.
  * \param out output buffer
  * \param outlen size of output buffer, number of bytes left are returned here
  * \param in input buffer
  * \param inlen size of input buffer, number of bytes left are returned here

  * \return 0 on success, otherwise a combination of the error flags above

  *
  * Make sure all buffers are appropriately padded, in must provide
  * AV_LZO_INPUT_PADDING, out must provide AV_LZO_OUTPUT_PADDING additional bytes.
  */

 int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);

 /**
  * \brief deliberately overlapping memcpy implementation
  * \param dst destination buffer; must be padded with 12 additional bytes
  * \param back how many bytes back we start (the initial size of the overlapping window)
  * \param cnt number of bytes to copy, must be >= 0
  *
  * cnt > back is valid, this will copy the bytes we just copied,
  * thus creating a repeating pattern with a period length of back.
  */

 void av_memcpy_backptr(uint8_t *dst, int back, int cnt);
 

 #endif /* AVUTIL_LZO_H */