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21a19b7912
Before this, almost all module groups have been used for grouping functions and fields in structures semantically. This causes them to not appear properly in the file documentation and needlessly clutters up the "Modules" index. Additionally, this commit streamlines some spelling and appearances.
67 lines
2.4 KiB
C
67 lines
2.4 KiB
C
/*
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* LZO 1x decompression
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* copyright (c) 2006 Reimar Doeffinger
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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_LZO_H
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#define AVUTIL_LZO_H
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#include <stdint.h>
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/** @name Error flags returned by av_lzo1x_decode
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* \{ */
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//! end of the input buffer reached before decoding finished
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#define AV_LZO_INPUT_DEPLETED 1
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//! decoded data did not fit into output buffer
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#define AV_LZO_OUTPUT_FULL 2
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//! a reference to previously decoded data was wrong
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#define AV_LZO_INVALID_BACKPTR 4
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//! a non-specific error in the compressed bitstream
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#define AV_LZO_ERROR 8
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/** \} */
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#define AV_LZO_INPUT_PADDING 8
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#define AV_LZO_OUTPUT_PADDING 12
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/**
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* @brief Decodes LZO 1x compressed data.
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* @param out output buffer
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* @param outlen size of output buffer, number of bytes left are returned here
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* @param in input buffer
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* @param inlen size of input buffer, number of bytes left are returned here
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* @return 0 on success, otherwise a combination of the error flags above
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*
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* Make sure all buffers are appropriately padded, in must provide
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* AV_LZO_INPUT_PADDING, out must provide AV_LZO_OUTPUT_PADDING additional bytes.
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*/
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int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
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/**
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* @brief deliberately overlapping memcpy implementation
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* @param dst destination buffer; must be padded with 12 additional bytes
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* @param back how many bytes back we start (the initial size of the overlapping window)
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* @param cnt number of bytes to copy, must be >= 0
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*
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* cnt > back is valid, this will copy the bytes we just copied,
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* thus creating a repeating pattern with a period length of back.
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*/
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void av_memcpy_backptr(uint8_t *dst, int back, int cnt);
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#endif /* AVUTIL_LZO_H */
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