rle.c File Reference

#include <string.h>
#include "libavutil/macros.h"
#include "rle.h"

Go to the source code of this file.

Functions
int	ff_rle_count_pixels (const uint8_t *start, int len, int bpp, int same)
	Count up to 127 consecutive pixels which are either all the same or all differ from the previous and next pixels. More...
int	ff_rle_encode (uint8_t *outbuf, int out_size, const uint8_t *ptr, int bpp, int w, int add_rep, int xor_rep, int add_raw, int xor_raw)
	RLE compress the row, with maximum size of out_size. More...

Function Documentation

ff_rle_count_pixels()

int ff_rle_count_pixels	(	const uint8_t *	start,
		int	len,
		int	bpp,
		int	same
	)

Count up to 127 consecutive pixels which are either all the same or all differ from the previous and next pixels.

Parameters

start	Pointer to the first pixel
len	Maximum number of pixels
bpp	Bytes per pixel
same	1 if searching for identical pixel values, 0 for differing

Returns

Number of matching consecutive pixels found

Definition at line 28 of file rle.c.

Referenced by ff_rle_encode(), and sgi_rle_encode().

ff_rle_encode()

int ff_rle_encode	(	uint8_t *	outbuf,
		int	out_size,
		const uint8_t *	inbuf,
		int	bpp,
		int	w,
		int	add_rep,
		int	xor_rep,
		int	add_raw,
		int	xor_raw
	)

RLE compress the row, with maximum size of out_size.

Value before repeated bytes is (count ^ xor_rep) + add_rep. Value before raw bytes is (count ^ xor_raw) + add_raw.

Parameters

outbuf	Output buffer
out_size	Maximum output size
inbuf	Input buffer
bpp	Bytes per pixel
w	Image width

Returns

Size of output in bytes, or -1 if larger than out_size

Definition at line 53 of file rle.c.

Referenced by encode_strip(), and targa_encode_rle().