kmvc.c File Reference

Karl Morton's Video Codec decoder. More...

#include <stdio.h>
#include <stdlib.h>
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"

Include dependency graph for kmvc.c:

Go to the source code of this file.

Data Structures
struct	KmvcContext
struct	BitBuf

Macros
#define	KMVC_KEYFRAME   0x80
#define	KMVC_PALETTE   0x40
#define	KMVC_METHOD   0x0F
#define	MAX_PALSIZE   256
#define	BLK(data, x, y)   data[(x) + (y) * 320]
#define	kmvc_init_getbits(bb, g)   bb.bits = 7; bb.bitbuf = bytestream2_get_byte(g);
#define	kmvc_getbit(bb, g, res)

Typedefs
typedef struct KmvcContext	KmvcContext
typedef struct BitBuf	BitBuf

Functions
static int	kmvc_decode_intra_8x8 (KmvcContext *ctx, int w, int h)
static int	kmvc_decode_inter_8x8 (KmvcContext *ctx, int w, int h)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_init (AVCodecContext *avctx)
static av_cold int	decode_end (AVCodecContext *avctx)

Variables
AVCodec	ff_kmvc_decoder

Detailed Description

Karl Morton's Video Codec decoder.

Definition in file kmvc.c.

Macro Definition Documentation

#define BLK	(		data,
			x,
			y
	)		data[(x) + (y) * 320]

Definition at line 58 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

#define kmvc_getbit	(		bb,
			g,
			res
	)

Value:

{\
    res = 0; \
    if (bb.bitbuf & (1 << bb.bits)) res = 1; \
    bb.bits--; \
    if(bb.bits == -1) { \
        bb.bitbuf = bytestream2_get_byte(g); \
        bb.bits = 7; \
    } \
}

Definition at line 62 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

#define kmvc_init_getbits	(		bb,
			g
	)		bb.bits = 7; bb.bitbuf = bytestream2_get_byte(g);

Definition at line 60 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

#define KMVC_KEYFRAME   0x80

Definition at line 34 of file kmvc.c.

Referenced by decode_frame().

#define KMVC_METHOD   0x0F

Definition at line 36 of file kmvc.c.

Referenced by decode_frame().

#define KMVC_PALETTE   0x40

Definition at line 35 of file kmvc.c.

Referenced by decode_frame().

#define MAX_PALSIZE   256

Definition at line 37 of file kmvc.c.

Referenced by decode_init().

Typedef Documentation

typedef struct BitBuf BitBuf

typedef struct KmvcContext KmvcContext

Function Documentation

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 422 of file kmvc.c.

static int decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 261 of file kmvc.c.

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 369 of file kmvc.c.

static int kmvc_decode_inter_8x8 ( KmvcContext *  ctx, int  w, int  h  )

static

Definition at line 161 of file kmvc.c.

Referenced by decode_frame().

static int kmvc_decode_intra_8x8 ( KmvcContext *  ctx, int  w, int  h  )

static

Definition at line 72 of file kmvc.c.

Referenced by decode_frame().

Variable Documentation

AVCodec ff_kmvc_decoder

Initial value:

= {
    .name           = "kmvc",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_KMVC,
    .priv_data_size = sizeof(KmvcContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("Karl Morton's video codec"),
}

Definition at line 432 of file kmvc.c.