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095946afa7
* qatar/release/0.7: (65 commits) riff: Add mpgv MPEG-2 fourcc Update Changelog matroskadec: fix integer underflow if header length < probe length. ffmpeg: fix operation with --disable-avfilter vf_libopencv: replace opencv/cxtypes.h #include by opencv/cxcore.h build: Create mlib optimization directories during out-of-tree builds. changelog: misc typo and wording fixes (cherry picked from commitb047941d7d) doc: Remove outdated comments about gcc 2.95 and gcc 3.3 support. (cherry picked from commit5ccbf80963) matroskadec: matroska_read_seek after after EBML_STOP leads to failure. Update RELEASE file update Changelog mt: proper locking around release_buffer calls. vp8/mt: flush worker thread, not application thread context, on seek. docs: Mention the upstream bugzilla url about the dlltool vs MSVC issue docs: Use proper markup for a literal command line option docs: Don't recommend adding --enable-memalign-hack docs: Remove needless configure options oggdec: prevent heap corruption. oggdec: Abort Ogg header parsing when encountering a data packet. Add LGPL license boilerplate to files lacking it. ... Conflicts: Changelog configure doc/developer.texi libavcodec/libvpxenc.c libavcodec/rawdec.c libavfilter/x86/gradfun.c libavformat/Makefile libavformat/isom.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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