libavcodec/xan.c File Reference

Xan video decoder for Wing Commander III computer game by Mario Brito (mbrito@student.dei.uc.pt) and Mike Melanson (melanson@pcisys.net). More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libavutil/intreadwrite.h"
#include "avcodec.h"

Go to the source code of this file.

Data Structures
struct	XanContext
Typedefs
typedef struct XanContext	XanContext
Functions
static av_cold int	xan_decode_init (AVCodecContext *avctx)
static void	bytecopy (unsigned char *dest, const unsigned char *src, int count)
static int	xan_huffman_decode (unsigned char *dest, const unsigned char *src, int dest_len)
static void	xan_unpack (unsigned char *dest, const unsigned char *src, int dest_len)
static void	xan_wc3_output_pixel_run (XanContext *s, const unsigned char *pixel_buffer, int x, int y, int pixel_count)
static void	xan_wc3_copy_pixel_run (XanContext *s, int x, int y, int pixel_count, int motion_x, int motion_y)
static void	xan_wc3_decode_frame (XanContext *s)
static void	xan_wc4_decode_frame (XanContext *s)
static int	xan_decode_frame (AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
static av_cold int	xan_decode_end (AVCodecContext *avctx)
Variables
AVCodec	xan_wc3_decoder

---

Detailed Description

Xan video decoder for Wing Commander III computer game by Mario Brito (mbrito@student.dei.uc.pt) and Mike Melanson (melanson@pcisys.net).

The xan_wc3 decoder outputs PAL8 data.

Definition in file xan.c.

---

Typedef Documentation

typedef struct XanContext XanContext

---

Function Documentation

static void bytecopy	(	unsigned char *	dest,
		const unsigned char *	src,
		int	count
	)			[inline, static]

Definition at line 91 of file xan.c.

Referenced by xan_unpack().

static av_cold int xan_decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 449 of file xan.c.

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

Definition at line 406 of file xan.c.

static av_cold int xan_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 58 of file xan.c.

static int xan_huffman_decode	(	unsigned char *	dest,
		const unsigned char *	src,
		int	dest_len
	)			[static]

Definition at line 99 of file xan.c.

Referenced by xan_wc3_decode_frame().

static void xan_unpack	(	unsigned char *	dest,
		const unsigned char *	src,
		int	dest_len
	)			[static]

Definition at line 133 of file xan.c.

Referenced by xan_wc3_decode_frame().

static void xan_wc3_copy_pixel_run	(	XanContext *	s,
		int	x,
		int	y,
		int	pixel_count,
		int	motion_x,
		int	motion_y
	)			[inline, static]

Definition at line 238 of file xan.c.

Referenced by xan_wc3_decode_frame().

static void xan_wc3_decode_frame

(

XanContext *

s

)

[static]

Definition at line 275 of file xan.c.

Referenced by xan_decode_frame().

static void xan_wc3_output_pixel_run	(	XanContext *	s,
		const unsigned char *	pixel_buffer,
		int	x,
		int	y,
		int	pixel_count
	)			[inline, static]

Definition at line 209 of file xan.c.

Referenced by xan_wc3_decode_frame().

static void xan_wc4_decode_frame

(

XanContext *

s

)

[static]

Definition at line 403 of file xan.c.

Referenced by xan_decode_frame().

---

Variable Documentation

AVCodec xan_wc3_decoder

Initial value:

 {
    "xan_wc3",
    CODEC_TYPE_VIDEO,
    CODEC_ID_XAN_WC3,
    sizeof(XanContext),
    xan_decode_init,
    NULL,
    xan_decode_end,
    xan_decode_frame,
    CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("Wing Commander III / Xan"),
}

Definition at line 465 of file xan.c.