ansi.c File Reference

ASCII/ANSI art decoder. More...

#include "libavutil/common.h"
#include "libavutil/frame.h"
#include "libavutil/lfg.h"
#include "libavutil/xga_font_data.h"
#include "avcodec.h"
#include "cga_data.h"
#include "internal.h"

Include dependency graph for ansi.c:

Go to the source code of this file.

Data Structures
struct	AnsiContext

Macros
#define	ATTR_BOLD   0x01
	Bold/Bright-foreground (mode 1) More...
#define	ATTR_FAINT   0x02
	Faint (mode 2) More...
#define	ATTR_UNDERLINE   0x08
	Underline (mode 4) More...
#define	ATTR_BLINK   0x10
	Blink/Bright-background (mode 5) More...
#define	ATTR_REVERSE   0x40
	Reverse (mode 7) More...
#define	ATTR_CONCEALED   0x80
	Concealed (mode 8) More...
#define	DEFAULT_FG_COLOR   7
	CGA color index. More...
#define	DEFAULT_BG_COLOR   0
#define	DEFAULT_SCREEN_MODE   3
	80x25 More...
#define	FONT_WIDTH   8
	Font width. More...
#define	MAX_NB_ARGS   4
#define	COLOR(x)   ((x) * 40 + 55)
#define	GRAY(x)   ((x) * 10 + 8)

Functions
static av_cold int	decode_init (AVCodecContext *avctx)
static void	set_palette (uint32_t *pal)
static void	hscroll (AVCodecContext *avctx)
static void	erase_line (AVCodecContext *avctx, int xoffset, int xlength)
static void	erase_screen (AVCodecContext *avctx)
static void	draw_char (AVCodecContext *avctx, int c)
	Draw character to screen. More...
static int	execute_code (AVCodecContext *avctx, int c)
	Execute ANSI escape code. More...
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_close (AVCodecContext *avctx)

Variables
static const uint8_t	ansi_to_cga [16]
	map ansi color index to cga palette index More...
AVCodec	ff_ansi_decoder

Detailed Description

ASCII/ANSI art decoder.

Definition in file ansi.c.

Macro Definition Documentation

#define ATTR_BLINK   0x10

Blink/Bright-background (mode 5)

Definition at line 38 of file ansi.c.

Referenced by draw_char().

#define ATTR_BOLD   0x01

Bold/Bright-foreground (mode 1)

Definition at line 35 of file ansi.c.

Referenced by draw_char().

#define ATTR_CONCEALED   0x80

Concealed (mode 8)

Definition at line 40 of file ansi.c.

Referenced by draw_char().

#define ATTR_FAINT   0x02

Faint (mode 2)

Definition at line 36 of file ansi.c.

#define ATTR_REVERSE   0x40

Reverse (mode 7)

Definition at line 39 of file ansi.c.

Referenced by draw_char().

#define ATTR_UNDERLINE   0x08

Underline (mode 4)

Definition at line 37 of file ansi.c.

#define COLOR

(

x

)

((x) * 40 + 55)

Referenced by avfilter_register_all(), and set_palette().

#define DEFAULT_BG_COLOR   0

Definition at line 43 of file ansi.c.

Referenced by decode_init(), erase_line(), erase_screen(), execute_code(), and hscroll().

#define DEFAULT_FG_COLOR   7

CGA color index.

Definition at line 42 of file ansi.c.

Referenced by decode_init(), and execute_code().

#define DEFAULT_SCREEN_MODE   3

80x25

Definition at line 44 of file ansi.c.

Referenced by execute_code().

#define FONT_WIDTH   8

Font width.

Definition at line 46 of file ansi.c.

Referenced by decode_frame(), draw_char(), and execute_code().

#define GRAY

(

x

)

((x) * 10 + 8)

Referenced by set_palette().

#define MAX_NB_ARGS   4

Definition at line 73 of file ansi.c.

Referenced by decode_frame(), and execute_code().

Function Documentation

static av_cold int decode_close ( AVCodecContext *  avctx )

static

Definition at line 455 of file ansi.c.

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

static

Definition at line 342 of file ansi.c.

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 78 of file ansi.c.

static void draw_char ( AVCodecContext *  avctx, int  c  )

static

Draw character to screen.

Definition at line 155 of file ansi.c.

Referenced by decode_frame().

static void erase_line ( AVCodecContext *  avctx, int  xoffset, int  xlength  )

static

Definition at line 134 of file ansi.c.

Referenced by execute_code().

static void erase_screen ( AVCodecContext *  avctx )

static

Definition at line 143 of file ansi.c.

Referenced by decode_frame(), and execute_code().

static int execute_code ( AVCodecContext *  avctx, int  c  )

static

Execute ANSI escape code.

Returns

0 on success, negative on error

Definition at line 182 of file ansi.c.

Referenced by decode_frame().

static void hscroll ( AVCodecContext *  avctx )

static

Definition at line 114 of file ansi.c.

Referenced by decode_frame(), and draw_char().

static void set_palette ( uint32_t *  pal )

static

Definition at line 99 of file ansi.c.

Referenced by decode_frame(), and execute_code().

Variable Documentation

const uint8_t ansi_to_cga[16]

static

Initial value:

= {
    0,  4,  2,  6,  1,  5,  3, 7, 8, 12, 10, 14,  9, 13, 11, 15
}

map ansi color index to cga palette index

Definition at line 49 of file ansi.c.

Referenced by execute_code().

AVCodec ff_ansi_decoder

Initial value:

= {
    .name           = "ansi",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_ANSI,
    .priv_data_size = sizeof(AnsiContext),
    .init           = decode_init,
    .close          = decode_close,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("ASCII/ANSI art"),
}

Definition at line 463 of file ansi.c.