kmvc.c File Reference

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

#include <stdio.h>
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "libavutil/common.h"

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)
#define	kmvc_init_getbits(bb, g)
#define	kmvc_getbit(bb, g, res)

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

Variables
const FFCodec	ff_kmvc_decoder

Detailed Description

Karl Morton's Video Codec decoder.

Definition in file kmvc.c.

Macro Definition Documentation

KMVC_KEYFRAME

#define KMVC_KEYFRAME   0x80

Definition at line 35 of file kmvc.c.

Referenced by decode_frame().

KMVC_PALETTE

#define KMVC_PALETTE   0x40

Definition at line 36 of file kmvc.c.

Referenced by decode_frame().

KMVC_METHOD

#define KMVC_METHOD   0x0F

Definition at line 37 of file kmvc.c.

Referenced by decode_frame().

MAX_PALSIZE

#define MAX_PALSIZE   256

Definition at line 38 of file kmvc.c.

Referenced by decode_init().

BLK

#define BLK	(		data,
			x,
			y )

Value:

data[av_clip((x) + (y) * 320, 0, 320 * 200 -1)]

Definition at line 59 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

kmvc_init_getbits

#define kmvc_init_getbits	(		bb,
			g )

Value:

bb.bits = 7; bb.bitbuf = bytestream2_get_byte(g);

Definition at line 61 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

kmvc_getbit

#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 63 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

Function Documentation

kmvc_decode_intra_8x8()

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

static

Definition at line 73 of file kmvc.c.

Referenced by decode_frame().

kmvc_decode_inter_8x8()

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

static

Definition at line 162 of file kmvc.c.

Referenced by decode_frame().

decode_frame()

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

static

Definition at line 262 of file kmvc.c.

decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 357 of file kmvc.c.

Variable Documentation

ff_kmvc_decoder

const FFCodec ff_kmvc_decoder

Initial value:

= {
    .p.name         = "kmvc",
    CODEC_LONG_NAME("Karl Morton's video codec"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_KMVC,
    .priv_data_size = sizeof(KmvcContext),
    .init           = decode_init,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 403 of file kmvc.c.