#include "avutil.h"
#include "common.h"
#include <string.h>
#include "lzo.h"
Go to the source code of this file.
Macros |
#define | OUTBUF_PADDED 1 |
| Avoid e.g. MPlayers fast_memcpy, it slows things down here.
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#define | INBUF_PADDED 1 |
| Define if we may read up to 8 bytes beyond the input buffer.
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#define | GETB(c) (*(c).in++) |
#define | BUILTIN_MEMCPY |
#define | COPY2(d, s) memcpy(d, s, 2); |
#define | COPY4(d, s) memcpy(d, s, 4); |
Functions |
static int | get_byte (LZOContext *c) |
| Reads one byte from the input buffer, avoiding an overrun.
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static int | get_len (LZOContext *c, int x, int mask) |
| Decodes a length value in the coding used by lzo.
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static void | copy (LZOContext *c, int cnt) |
| Copies bytes from input to output buffer with checking.
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static void | memcpy_backptr (uint8_t *dst, int back, int cnt) |
static void | copy_backptr (LZOContext *c, int back, int cnt) |
| Copies previously decoded bytes to current position.
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void | av_memcpy_backptr (uint8_t *dst, int back, int cnt) |
| deliberately overlapping memcpy implementation
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int | av_lzo1x_decode (void *out, int *outlen, const void *in, int *inlen) |
| Decodes LZO 1x compressed data.
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Macro Definition Documentation
Definition at line 72 of file lzo.c.
#define COPY2 |
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| memcpy(d, s, 2); |
#define COPY4 |
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| memcpy(d, s, 4); |
#define GETB |
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c | ) |
(*(c).in++) |
Define if we may read up to 8 bytes beyond the input buffer.
Definition at line 32 of file lzo.c.
Avoid e.g. MPlayers fast_memcpy, it slows things down here.
Define if we may write up to 12 bytes beyond the output buffer.
Definition at line 30 of file lzo.c.
Typedef Documentation
Function Documentation
Copies previously decoded bytes to current position.
- Parameters
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back | how many bytes back we start |
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.
Definition at line 125 of file lzo.c.
Referenced by av_lzo1x_decode().
Reads one byte from the input buffer, avoiding an overrun.
- Returns
- byte read
Definition at line 43 of file lzo.c.
Referenced by get_len().
static int get_len |
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LZOContext * |
c, |
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int |
x, |
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int |
mask |
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inlinestatic |
Decodes a length value in the coding used by lzo.
- Parameters
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x | previous byte value |
mask | bits used from x |
- Returns
- decoded length value
Definition at line 62 of file lzo.c.
Referenced by av_lzo1x_decode().
static void memcpy_backptr |
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uint8_t * |
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int |
back, |
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int |
cnt |
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inlinestatic |