libavcodec/rl2.c File Reference

RL2 Video Decoder. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libavutil/intreadwrite.h"
#include "avcodec.h"

Go to the source code of this file.

Data Structures
struct	Rl2Context
Defines
#define	EXTRADATA1_SIZE   (6 + 256 * 3)
	video base, clr count, palette
Functions
static void	rl2_rle_decode (Rl2Context *s, const unsigned char *in, int size, unsigned char *out, int stride, int video_base)
	Run Length Decode a single 320x200 frame.
static av_cold int	rl2_decode_init (AVCodecContext *avctx)
	Initialize the decoder.
static int	rl2_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
	Decode a single frame.
static av_cold int	rl2_decode_end (AVCodecContext *avctx)
	Uninit decoder.
Variables
AVCodec	rl2_decoder

---

Detailed Description

RL2 Video Decoder.

Author:

Sascha Sommer (saschasommer@freenet.de) For more information about the RL2 format, visit: http://wiki.multimedia.cx/index.php?title=RL2

Definition in file rl2.c.

---

Define Documentation

#define EXTRADATA1_SIZE   (6 + 256 * 3)

video base, clr count, palette

Definition at line 38 of file rl2.c.

Referenced by rl2_decode_init(), and rl2_read_header().

---

Function Documentation

static av_cold int rl2_decode_end

(

AVCodecContext *

avctx

)

[static]

Uninit decoder.

Parameters:

avctx

decoder context

Returns:

0 success, -1 on error

Definition at line 218 of file rl2.c.

static int rl2_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			[static]

Decode a single frame.

Parameters:

	avctx	decoder context
	data	decoded frame
	data_size	size of the decoded frame
	buf	input buffer
	buf_size	input buffer size

Returns:

0 success, -1 on error

get buffer

run length decode

make the palette available on the way out

report that the buffer was completely consumed

Definition at line 181 of file rl2.c.

static av_cold int rl2_decode_init

(

AVCodecContext *

avctx

)

[static]

Initialize the decoder.

Parameters:

avctx

decoder context

Returns:

0 success, -1 on error

parse extra data

get frame_offset

initialize palette

decode background frame if present

Definition at line 130 of file rl2.c.

static void rl2_rle_decode	(	Rl2Context *	s,
		const unsigned char *	in,
		int	size,
		unsigned char *	out,
		int	stride,
		int	video_base
	)			[static]

Run Length Decode a single 320x200 frame.

Parameters:

	s	rl2 context
	buf	input buffer
	size	input buffer size
	out	ouput buffer
	stride	stride of the output buffer
	video_base	offset of the rle data inside the frame

copy start of the background frame

decode the variable part of the frame

copy the rest from the background frame

Definition at line 59 of file rl2.c.

Referenced by rl2_decode_frame(), and rl2_decode_init().

---

Variable Documentation

AVCodec rl2_decoder

Initial value:

 {
    "rl2",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_RL2,
    sizeof(Rl2Context),
    rl2_decode_init,
    NULL,
    rl2_decode_end,
    rl2_decode_frame,
    CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("RL2 video"),
}

Definition at line 231 of file rl2.c.