libavcodec/lcldec.c File Reference

LCL (LossLess Codec Library) Video Codec Decoder for MSZH and ZLIB codecs Experimental encoder for ZLIB RGB24. More...

#include <stdio.h>
#include <stdlib.h>
#include "avcodec.h"
#include "bytestream.h"
#include "lcl.h"
#include "libavutil/lzo.h"

Go to the source code of this file.

Data Structures
struct	LclDecContext
Functions
static unsigned int	mszh_decomp (const unsigned char *srcptr, int srclen, unsigned char *destptr, unsigned int destsize)
static int	decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
	decompress a zlib-compressed data block into decomp_buf
static av_cold int	decode_init (AVCodecContext *avctx)
static av_cold int	decode_end (AVCodecContext *avctx)

---

Detailed Description

LCL (LossLess Codec Library) Video Codec Decoder for MSZH and ZLIB codecs Experimental encoder for ZLIB RGB24.

Fourcc: MSZH, ZLIB

Original Win32 dll: Ver2.23 By Kenji Oshima 2000.09.20 avimszh.dll, avizlib.dll

A description of the decoding algorithm can be found here: http://www.pcisys.net/~melanson/codecs

Supports: BGR24 (RGB 24bpp)

Definition in file lcldec.c.

---

Function Documentation

static av_cold int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 596 of file lcldec.c.

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

decompress a zlib-compressed data block into decomp_buf

Parameters:

	src	compressed input buffer
	src_len	data length in input buffer
	offset	offset in decomp_buf
	expected	expected decompressed length

Definition at line 160 of file lcldec.c.

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 449 of file lcldec.c.

static unsigned int mszh_decomp	(	const unsigned char *	srcptr,
		int	srclen,
		unsigned char *	destptr,
		unsigned int	destsize
	)			[static]

Parameters:

	srcptr	compressed source buffer, must be padded with at least 5 extra bytes
	destptr	must be padded sufficiently for av_memcpy_backptr

Definition at line 79 of file lcldec.c.

Referenced by decode_frame().