snappy.c File Reference

#include "libavutil/mem.h"
#include "bytestream.h"
#include "snappy.h"

Go to the source code of this file.

Enumerations
enum	{ SNAPPY_LITERAL, SNAPPY_COPY_1, SNAPPY_COPY_2, SNAPPY_COPY_4 }

Functions
static int64_t	bytestream2_get_levarint (GetByteContext *gb)
static int	snappy_literal (GetByteContext *gb, uint8_t *p, int size, int val)
static int	snappy_copy (uint8_t *start, uint8_t *p, int size, unsigned int off, int len)
static int	snappy_copy1 (GetByteContext *gb, uint8_t *start, uint8_t *p, int size, int val)
static int	snappy_copy2 (GetByteContext *gb, uint8_t *start, uint8_t *p, int size, int val)
static int	snappy_copy4 (GetByteContext *gb, uint8_t *start, uint8_t *p, int size, int val)
static int64_t	decode_len (GetByteContext *gb)
int64_t	ff_snappy_peek_uncompressed_length (GetByteContext *gb)
	Get the uncompressed length of an input buffer compressed using the Snappy algorithm. More...
int	ff_snappy_uncompress (GetByteContext *gb, uint8_t *buf, int64_t *size)
	Decompress an input buffer using Snappy algorithm. More...

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
SNAPPY_LITERAL
SNAPPY_COPY_1
SNAPPY_COPY_2
SNAPPY_COPY_4

Definition at line 27 of file snappy.c.

Function Documentation

bytestream2_get_levarint()

static int64_t bytestream2_get_levarint ( GetByteContext *  gb )

static

Definition at line 34 of file snappy.c.

Referenced by decode_len().

snappy_literal()

static int snappy_literal ( GetByteContext *  gb, uint8_t *  p, int  size, int  val  )

static

Definition at line 49 of file snappy.c.

Referenced by ff_snappy_uncompress().

snappy_copy()

static int snappy_copy ( uint8_t *  start, uint8_t *  p, int  size, unsigned int  off, int  len  )

static

Definition at line 78 of file snappy.c.

Referenced by snappy_copy1(), snappy_copy2(), and snappy_copy4().

snappy_copy1()

static int snappy_copy1 ( GetByteContext *  gb, uint8_t *  start, uint8_t *  p, int  size, int  val  )

static

Definition at line 94 of file snappy.c.

Referenced by ff_snappy_uncompress().

snappy_copy2()

static int snappy_copy2 ( GetByteContext *  gb, uint8_t *  start, uint8_t *  p, int  size, int  val  )

static

Definition at line 103 of file snappy.c.

Referenced by ff_snappy_uncompress().

snappy_copy4()

static int snappy_copy4 ( GetByteContext *  gb, uint8_t *  start, uint8_t *  p, int  size, int  val  )

static

Definition at line 112 of file snappy.c.

Referenced by ff_snappy_uncompress().

decode_len()

static int64_t decode_len ( GetByteContext *  gb )

static

Definition at line 121 of file snappy.c.

Referenced by ff_snappy_peek_uncompressed_length(), and ff_snappy_uncompress().

ff_snappy_peek_uncompressed_length()

int64_t ff_snappy_peek_uncompressed_length

(

GetByteContext *

gb

)

Get the uncompressed length of an input buffer compressed using the Snappy algorithm.

The GetByteContext is not advanced.

Parameters

gb	input GetByteContext.

Returns

A positive length on success, AVERROR otherwise.

Definition at line 131 of file snappy.c.

Referenced by hap_parse_frame_header().

ff_snappy_uncompress()

int ff_snappy_uncompress	(	GetByteContext *	gb,
		uint8_t *	buf,
		int64_t *	size
	)

Decompress an input buffer using Snappy algorithm.

Parameters

gb	input GetByteContext.
buf	input buffer pointer.
size	input/output on input, the size of buffer, on output, the size of the uncompressed data.

Returns

0 if success, AVERROR otherwise.

Definition at line 141 of file snappy.c.

Referenced by decompress_chunks_thread().