libavcodec/kmvc.c File Reference

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

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

Go to the source code of this file.

Data Structures
struct	KmvcContext
struct	BitBuf
Defines
#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, src)   bb.bits = 7; bb.bitbuf = *src++;
#define	kmvc_getbit(bb, src, src_end, res)
Functions
static int	kmvc_decode_intra_8x8 (KmvcContext *ctx, const uint8_t *src, int src_size, int w, int h)
static int	kmvc_decode_inter_8x8 (KmvcContext *ctx, const uint8_t *src, int src_size, int w, int h)
static int	decode_frame (AVCodecContext *avctx, void *data, int *data_size, 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.

---

Define Documentation

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

Definition at line 57 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

#define kmvc_getbit	(	bb,
		src,
		src_end,
		res		)

Value:

{\
    res = 0; \
    if (bb.bitbuf & (1 << bb.bits)) res = 1; \
    bb.bits--; \
    if(bb.bits == -1) { \
        if (src >= src_end) { \
            av_log(ctx->avctx, AV_LOG_ERROR, "Data overrun\n"); \
            return AVERROR_INVALIDDATA; \
        } \
        bb.bitbuf = *src++; \
        bb.bits = 7; \
    } \
}

Definition at line 61 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

#define kmvc_init_getbits	(	bb,
		src		)	bb.bits = 7; bb.bitbuf = *src++;

Definition at line 59 of file kmvc.c.

Referenced by kmvc_decode_inter_8x8(), and kmvc_decode_intra_8x8().

#define KMVC_KEYFRAME   0x80

Definition at line 33 of file kmvc.c.

Referenced by decode_frame().

#define KMVC_METHOD   0x0F

Definition at line 35 of file kmvc.c.

Referenced by decode_frame().

#define KMVC_PALETTE   0x40

Definition at line 34 of file kmvc.c.

Referenced by decode_frame().

#define MAX_PALSIZE   256

Definition at line 36 of file kmvc.c.

Referenced by decode_init().

---

Function Documentation

static av_cold int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 448 of file kmvc.c.

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

Definition at line 278 of file kmvc.c.

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 393 of file kmvc.c.

static int kmvc_decode_inter_8x8	(	KmvcContext *	ctx,
		const uint8_t *	src,
		int	src_size,
		int	w,
		int	h
	)			[static]

Definition at line 173 of file kmvc.c.

Referenced by decode_frame().

static int kmvc_decode_intra_8x8	(	KmvcContext *	ctx,
		const uint8_t *	src,
		int	src_size,
		int	w,
		int	h
	)			[static]

Definition at line 75 of file kmvc.c.

Referenced by decode_frame().

---

Variable Documentation

AVCodec ff_kmvc_decoder

Initial value:

 {
    "kmvc",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_KMVC,
    sizeof(KmvcContext),
    decode_init,
    NULL,
    decode_end,
    decode_frame,
    CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("Karl Morton's video codec"),
}

Definition at line 460 of file kmvc.c.