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 "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "libavutil/lzo.h"

Go to the source code of this file.

Data Structures
struct	XanContext
Defines
#define	ALT_BITSTREAM_READER_LE
Functions
static av_cold int	xan_decode_init (AVCodecContext *avctx)
static int	xan_huffman_decode (unsigned char *dest, int dest_len, const unsigned char *src, int src_len)
static void	xan_unpack (unsigned char *dest, const unsigned char *src, int dest_len)
	unpack simple compression
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, AVPacket *avpkt)
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.

---

Define Documentation

#define ALT_BITSTREAM_READER_LE

Definition at line 38 of file xan.c.

---

Function Documentation

static av_cold int xan_decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 404 of file xan.c.

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

Definition at line 359 of file xan.c.

static av_cold int xan_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 62 of file xan.c.

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

Definition at line 91 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]

unpack simple compression

Parameters:

dest

destination buffer of dest_len, must be padded with at least 130 bytes

Definition at line 123 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 201 of file xan.c.

Referenced by xan_wc3_decode_frame().

static void xan_wc3_decode_frame

(

XanContext *

s

)

[static]

Definition at line 241 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 171 of file xan.c.

Referenced by xan_wc3_decode_frame().

static void xan_wc4_decode_frame

(

XanContext *

s

)

[static]

Definition at line 356 of file xan.c.

Referenced by xan_decode_frame().

---

Variable Documentation

AVCodec xan_wc3_decoder

Initial value:

 {
    "xan_wc3",
    AVMEDIA_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 420 of file xan.c.