libavcodec/rl2.c File Reference

RL2 Video Decoder. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.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)
static av_cold int	rl2_decode_end (AVCodecContext *avctx)
	Uninit decoder.
Variables
AVCodec	ff_rl2_decoder

---

Detailed Description

RL2 Video Decoder.

Author:

Sascha Sommer (saschasommer@freenet.de)

See also:

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 39 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 211 of file rl2.c.

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

get buffer

run length decode

make the palette available on the way out

report that the buffer was completely consumed

Definition at line 174 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 131 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
	in	input buffer
	size	input buffer size
	out	output 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 60 of file rl2.c.

Referenced by rl2_decode_frame(), and rl2_decode_init().

---

Variable Documentation

AVCodec ff_rl2_decoder

Initial value:

 {
    .name           = "rl2",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_RL2,
    .priv_data_size = sizeof(Rl2Context),
    .init           = rl2_decode_init,
    .close          = rl2_decode_end,
    .decode         = rl2_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("RL2 video"),
}

Definition at line 224 of file rl2.c.