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lzo.h
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1 /*
2  * LZO 1x decompression
3  * copyright (c) 2006 Reimar Doeffinger
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVUTIL_LZO_H
23 #define AVUTIL_LZO_H
24 
25 /**
26  * @defgroup lavu_lzo LZO
27  * @ingroup lavu_crypto
28  *
29  * @{
30  */
31 
32 #include <stdint.h>
33 
34 /** @name Error flags returned by av_lzo1x_decode
35  * @{ */
36 /// end of the input buffer reached before decoding finished
37 #define AV_LZO_INPUT_DEPLETED 1
38 /// decoded data did not fit into output buffer
39 #define AV_LZO_OUTPUT_FULL 2
40 /// a reference to previously decoded data was wrong
41 #define AV_LZO_INVALID_BACKPTR 4
42 /// a non-specific error in the compressed bitstream
43 #define AV_LZO_ERROR 8
44 /** @} */
45 
46 #define AV_LZO_INPUT_PADDING 8
47 #define AV_LZO_OUTPUT_PADDING 12
48 
49 /**
50  * @brief Decodes LZO 1x compressed data.
51  * @param out output buffer
52  * @param outlen size of output buffer, number of bytes left are returned here
53  * @param in input buffer
54  * @param inlen size of input buffer, number of bytes left are returned here
55  * @return 0 on success, otherwise a combination of the error flags above
56  *
57  * Make sure all buffers are appropriately padded, in must provide
58  * AV_LZO_INPUT_PADDING, out must provide AV_LZO_OUTPUT_PADDING additional bytes.
59  */
60 int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
61 
62 /**
63  * @}
64  */
65 
66 #endif /* AVUTIL_LZO_H */