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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"
#include "internal.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 More...
 

Functions

static void rl2_rle_decode (Rl2Context *s, const uint8_t *in, int size, uint8_t *out, int stride, int video_base)
 Run Length Decode a single 320x200 frame. More...
 
static av_cold int rl2_decode_init (AVCodecContext *avctx)
 Initialize the decoder. More...
 
static int rl2_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static av_cold int rl2_decode_end (AVCodecContext *avctx)
 Uninit decoder. More...
 

Variables

AVCodec 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

#define EXTRADATA1_SIZE   (6 + 256 * 3)

video base, clr count, palette

Definition at line 40 of file rl2.c.

Referenced by rl2_decode_init().

Function Documentation

static void rl2_rle_decode ( Rl2Context s,
const uint8_t in,
int  size,
uint8_t out,
int  stride,
int  video_base 
)
static

Run Length Decode a single 320x200 frame.

Parameters
srl2 context
ininput buffer
sizeinput buffer size
outoutput buffer
stridestride of the output buffer
video_baseoffset 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().

static av_cold int rl2_decode_init ( AVCodecContext avctx)
static

Initialize the decoder.

Parameters
avctxdecoder context
Returns
0 success, -1 on error

parse extra data

get frame_offset

initialize palette

decode background frame if present

Definition at line 132 of file rl2.c.

static int rl2_decode_frame ( AVCodecContext avctx,
void data,
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 175 of file rl2.c.

static av_cold int rl2_decode_end ( AVCodecContext avctx)
static

Uninit decoder.

Parameters
avctxdecoder context
Returns
0 success, -1 on error

Definition at line 206 of file rl2.c.

Variable Documentation

AVCodec ff_rl2_decoder
Initial value:
= {
.name = "rl2",
.long_name = NULL_IF_CONFIG_SMALL("RL2 video"),
.priv_data_size = sizeof(Rl2Context),
.close = rl2_decode_end,
.capabilities = AV_CODEC_CAP_DR1,
}
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static av_cold int rl2_decode_end(AVCodecContext *avctx)
Uninit decoder.
Definition: rl2.c:206
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
Definition: rl2.c:42
static int rl2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: rl2.c:175
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
static av_cold int rl2_decode_init(AVCodecContext *avctx)
Initialize the decoder.
Definition: rl2.c:132
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:953

Definition at line 216 of file rl2.c.