rl2.c File Reference

RL2 Video Decoder. More...

#include <string.h>
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"

Go to the source code of this file.

Data Structures
struct	Rl2Context

Macros
#define	EXTRADATA1_SIZE   (6 + 256 * 3)
	video base, clr count, palette

Functions
static void	rl2_rle_decode (Rl2Context *s, const uint8_t *in, int size, uint8_t *out, ptrdiff_t 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, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static av_cold int	rl2_decode_end (AVCodecContext *avctx)
	Uninit decoder.

Variables
const FFCodec	ff_rl2_decoder

Detailed Description

RL2 Video Decoder.

Author

Sascha Sommer (sasch.nosp@m.asom.nosp@m.mer@f.nosp@m.reen.nosp@m.et.de)

See also

http://wiki.multimedia.cx/index.php?title=RL2

Definition in file rl2.c.

Macro Definition Documentation

EXTRADATA1_SIZE

#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

rl2_rle_decode()

static void rl2_rle_decode ( Rl2Context * s, const uint8_t * in, int size, uint8_t * out, ptrdiff_t 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 59 of file rl2.c.

Referenced by rl2_decode_frame(), and rl2_decode_init().

rl2_decode_init()

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 148 of file rl2.c.

rl2_decode_frame()

static int rl2_decode_frame ( AVCodecContext * avctx, AVFrame * frame, int * got_frame, AVPacket * avpkt )

static

run length decode

make the palette available on the way out

report that the buffer was completely consumed

Definition at line 198 of file rl2.c.

rl2_decode_end()

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 227 of file rl2.c.

Variable Documentation

ff_rl2_decoder

const FFCodec ff_rl2_decoder

Initial value:

= {
    .p.name         = "rl2",
    CODEC_LONG_NAME("RL2 video"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_RL2,
    .priv_data_size = sizeof(Rl2Context),
    .init           = rl2_decode_init,
    .close          = rl2_decode_end,
    FF_CODEC_DECODE_CB(rl2_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 237 of file rl2.c.