hvirtual/quicktime/ffmpeg/libavcodec/lcl.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include "common.h"
#include "bitstream.h"
#include "avcodec.h"

Include dependency graph for lcl.c:

Go to the source code of this file.

Data Structures
struct	LclContext
Defines
#define	BMPTYPE_YUV   1
#define	BMPTYPE_RGB   2
#define	IMGTYPE_YUV111   0
#define	IMGTYPE_YUV422   1
#define	IMGTYPE_RGB24   2
#define	IMGTYPE_YUV411   3
#define	IMGTYPE_YUV211   4
#define	IMGTYPE_YUV420   5
#define	COMP_MSZH   0
#define	COMP_MSZH_NOCOMP   1
#define	COMP_ZLIB_HISPEED   1
#define	COMP_ZLIB_HICOMP   9
#define	COMP_ZLIB_NORMAL   -1
#define	FLAG_MULTITHREAD   1
#define	FLAG_NULLFRAME   2
#define	FLAG_PNGFILTER   4
#define	FLAGMASK_UNUSED   0xf8
#define	CODEC_MSZH   1
#define	CODEC_ZLIB   3
#define	FOURCC_MSZH   mmioFOURCC('M','S','Z','H')
#define	FOURCC_ZLIB   mmioFOURCC('Z','L','I','B')
Functions
static unsigned char	fix (int pix14)
static unsigned char	get_b (unsigned char yq, signed char bq)
static unsigned char	get_g (unsigned char yq, signed char bq, signed char rq)
static unsigned char	get_r (unsigned char yq, signed char rq)
static unsigned int	mszh_decomp (unsigned char *srcptr, int srclen, unsigned char *destptr, unsigned int destsize)
static int	decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
static int	encode_frame (AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)
static int	decode_init (AVCodecContext *avctx)
static int	encode_init (AVCodecContext *avctx)
static int	decode_end (AVCodecContext *avctx)
static int	encode_end (AVCodecContext *avctx)
Variables
AVCodec	mszh_decoder
AVCodec	zlib_decoder

---

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 lcl.c.

---

Define Documentation

#define BMPTYPE_RGB   2

Definition at line 53 of file lcl.c.

#define BMPTYPE_YUV   1

Definition at line 52 of file lcl.c.

#define CODEC_MSZH   1

Definition at line 73 of file lcl.c.

Referenced by decode_init().

#define CODEC_ZLIB   3

Definition at line 74 of file lcl.c.

Referenced by decode_init(), and encode_init().

#define COMP_MSZH   0

Definition at line 62 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define COMP_MSZH_NOCOMP   1

Definition at line 63 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define COMP_ZLIB_HICOMP   9

Definition at line 65 of file lcl.c.

Referenced by decode_init().

#define COMP_ZLIB_HISPEED   1

Definition at line 64 of file lcl.c.

Referenced by decode_init().

#define COMP_ZLIB_NORMAL   -1

Definition at line 66 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define FLAG_MULTITHREAD   1

Definition at line 68 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define FLAG_NULLFRAME   2

Definition at line 69 of file lcl.c.

Referenced by decode_init().

#define FLAG_PNGFILTER   4

Definition at line 70 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define FLAGMASK_UNUSED   0xf8

Definition at line 71 of file lcl.c.

Referenced by decode_init().

#define FOURCC_MSZH   mmioFOURCC('M','S','Z','H')

Definition at line 76 of file lcl.c.

#define FOURCC_ZLIB   mmioFOURCC('Z','L','I','B')

Definition at line 77 of file lcl.c.

#define IMGTYPE_RGB24   2

Definition at line 57 of file lcl.c.

Referenced by decode_frame(), decode_init(), and encode_init().

#define IMGTYPE_YUV111   0

Definition at line 55 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define IMGTYPE_YUV211   4

Definition at line 59 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define IMGTYPE_YUV411   3

Definition at line 58 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define IMGTYPE_YUV420   5

Definition at line 60 of file lcl.c.

Referenced by decode_frame(), and decode_init().

#define IMGTYPE_YUV422   1

Definition at line 56 of file lcl.c.

Referenced by decode_frame(), and decode_init().

---

Function Documentation

static int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 852 of file lcl.c.

References c, LclContext::pic, AVCodecContext::priv_data, and AVCodecContext::release_buffer.

static int decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 199 of file lcl.c.

References av_log(), AV_LOG_ERROR, c, AVCodecContext::codec_id, CODEC_ID_MSZH, CODEC_ID_ZLIB, COMP_MSZH, COMP_MSZH_NOCOMP, COMP_ZLIB_NORMAL, LclContext::compression, LclContext::decomp_buf, LclContext::decomp_size, FF_BUFFER_HINTS_VALID, FLAG_MULTITHREAD, FLAG_PNGFILTER, LclContext::flags, get_b(), AVCodecContext::get_buffer, get_g(), get_r(), AVCodecContext::height, height, LclContext::imgtype, IMGTYPE_RGB24, IMGTYPE_YUV111, IMGTYPE_YUV211, IMGTYPE_YUV411, IMGTYPE_YUV420, IMGTYPE_YUV422, mszh_decomp(), LclContext::pic, AVCodecContext::priv_data, AVCodecContext::release_buffer, AVCodecContext::width, and width.

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static int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 616 of file lcl.c.

References av_log(), AV_LOG_ERROR, AV_LOG_INFO, av_malloc(), avcodec_check_dimensions(), LclContext::avctx, c, AVCodecContext::codec_id, CODEC_ID_MSZH, CODEC_ID_ZLIB, CODEC_MSZH, CODEC_ZLIB, COMP_MSZH, COMP_MSZH_NOCOMP, COMP_ZLIB_HICOMP, COMP_ZLIB_HISPEED, COMP_ZLIB_NORMAL, LclContext::compression, LclContext::decomp_buf, LclContext::decomp_size, AVCodecContext::extradata, AVCodecContext::extradata_size, FLAG_MULTITHREAD, FLAG_NULLFRAME, FLAG_PNGFILTER, FLAGMASK_UNUSED, LclContext::flags, AVCodecContext::has_b_frames, AVCodecContext::height, LclContext::imgtype, IMGTYPE_RGB24, IMGTYPE_YUV111, IMGTYPE_YUV211, IMGTYPE_YUV411, IMGTYPE_YUV420, IMGTYPE_YUV422, NULL, LclContext::pic, AVCodecContext::pix_fmt, PIX_FMT_BGR24, AVCodecContext::priv_data, and AVCodecContext::width.

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static int encode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 872 of file lcl.c.

References av_freep(), c, LclContext::comp_buf, AVCodecContext::extradata, and AVCodecContext::priv_data.

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static int encode_frame	(	AVCodecContext *	avctx,
		unsigned char *	buf,
		int	buf_size,
		void *	data
	)			[static]

Definition at line 555 of file lcl.c.

References av_log(), AV_LOG_ERROR, c, LclContext::comp_buf, FF_I_TYPE, flush_put_bits(), AVCodecContext::height, init_put_bits(), LclContext::max_comp_size, LclContext::pb, LclContext::pic, AVCodecContext::pix_fmt, PIX_FMT_BGR24, AVCodecContext::priv_data, put_bits(), and AVCodecContext::width.

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static int encode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 780 of file lcl.c.

References av_log(), AV_LOG_ERROR, av_malloc(), av_mallocz(), LclContext::avctx, AVCodecContext::bits_per_sample, c, CODEC_ZLIB, AVCodecContext::coded_frame, LclContext::comp_buf, LclContext::compression, LclContext::decomp_size, AVCodecContext::extradata, AVCodecContext::extradata_size, LclContext::flags, AVCodecContext::height, LclContext::imgtype, IMGTYPE_RGB24, LclContext::max_comp_size, NULL, LclContext::pic, AVCodecContext::pix_fmt, PIX_FMT_BGR24, AVCodecContext::priv_data, and AVCodecContext::width.

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static unsigned char fix

(

int

pix14

)

[inline, static]

Definition at line 113 of file lcl.c.

Referenced by get_b(), get_g(), and get_r().

static unsigned char get_b	(	unsigned char	yq,
		signed char	bq
	)			[inline, static]

Definition at line 127 of file lcl.c.

References fix().

Referenced by decode_frame().

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static unsigned char get_g	(	unsigned char	yq,
		signed char	bq,
		signed char	rq
	)			[inline, static]

Definition at line 134 of file lcl.c.

References fix().

Referenced by decode_frame().

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static unsigned char get_r	(	unsigned char	yq,
		signed char	rq
	)			[inline, static]

Definition at line 141 of file lcl.c.

References fix().

Referenced by decode_frame().

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

Definition at line 148 of file lcl.c.

Referenced by decode_frame().

---

Variable Documentation

AVCodec mszh_decoder

Initial value:

 {
        "mszh",
        CODEC_TYPE_VIDEO,
        CODEC_ID_MSZH,
        sizeof(LclContext),
        decode_init,
        NULL,
        decode_end,
        decode_frame,
        CODEC_CAP_DR1,
}

Definition at line 885 of file lcl.c.

Referenced by avcodec_register_all().

AVCodec zlib_decoder

Initial value:

 {
        "zlib",
        CODEC_TYPE_VIDEO,
        CODEC_ID_ZLIB,
        sizeof(LclContext),
        decode_init,
        NULL,
        decode_end,
        decode_frame,
        CODEC_CAP_DR1,
}

Definition at line 898 of file lcl.c.

Referenced by avcodec_register_all().