libavcodec/rle.c File Reference

#include "avcodec.h"
#include "rle.h"

Go to the source code of this file.

Functions
static int	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.
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.

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Function Documentation

static int count_pixels	(	const uint8_t *	start,
		int	len,
		int	bpp,
		int	same
	)			[static]

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 33 of file rle.c.

Referenced by 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 57 of file rle.c.

Referenced by encode_frame(), encode_strip(), and targa_encode_rle().