123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566 |
- /*
- * 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>
- /** @name 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 */
|