ansi.c File Reference

ASCII/ANSI art decoder. More...

#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "libavutil/frame.h"
#include "libavutil/xga_font_data.h"
#include "avcodec.h"
#include "cga_data.h"
#include "codec_internal.h"
#include "decode.h"

Go to the source code of this file.

Data Structures
struct	AnsiContext

Macros
#define	ATTR_BOLD   0x01
	Bold/Bright-foreground (mode 1)
#define	ATTR_FAINT   0x02
	Faint (mode 2)
#define	ATTR_ITALICS   0x04
	Italics (mode 3)
#define	ATTR_UNDERLINE   0x08
	Underline (mode 4)
#define	ATTR_BLINK   0x10
	Blink/Bright-background (mode 5)
#define	ATTR_REVERSE   0x40
	Reverse (mode 7)
#define	ATTR_CONCEALED   0x80
	Concealed (mode 8)
#define	DEFAULT_FG_COLOR   7
	CGA color index.
#define	DEFAULT_BG_COLOR   0
#define	DEFAULT_SCREEN_MODE   3
	80x25
#define	FONT_WIDTH   8
	Font width.
#define	MAX_NB_ARGS   4
#define	COLOR(x)
#define	GRAY(x)

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.
static int	execute_code (AVCodecContext *avctx, int c)
	Execute ANSI escape code.
static int	decode_frame (AVCodecContext *avctx, AVFrame *rframe, 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
static const FFCodecDefault	ansi_defaults []
const FFCodec	ff_ansi_decoder

Detailed Description

ASCII/ANSI art decoder.

Definition in file ansi.c.

Macro Definition Documentation

ATTR_BOLD

#define ATTR_BOLD   0x01

Bold/Bright-foreground (mode 1)

Definition at line 36 of file ansi.c.

Referenced by draw_char().

ATTR_FAINT

#define ATTR_FAINT   0x02

Faint (mode 2)

Definition at line 37 of file ansi.c.

ATTR_ITALICS

#define ATTR_ITALICS   0x04

Italics (mode 3)

Definition at line 38 of file ansi.c.

ATTR_UNDERLINE

#define ATTR_UNDERLINE   0x08

Underline (mode 4)

Definition at line 39 of file ansi.c.

ATTR_BLINK

#define ATTR_BLINK   0x10

Blink/Bright-background (mode 5)

Definition at line 40 of file ansi.c.

Referenced by draw_char().

ATTR_REVERSE

#define ATTR_REVERSE   0x40

Reverse (mode 7)

Definition at line 41 of file ansi.c.

Referenced by draw_char().

ATTR_CONCEALED

#define ATTR_CONCEALED   0x80

Concealed (mode 8)

Definition at line 42 of file ansi.c.

Referenced by draw_char().

DEFAULT_FG_COLOR

#define DEFAULT_FG_COLOR   7

CGA color index.

Definition at line 44 of file ansi.c.

Referenced by decode_init(), and execute_code().

DEFAULT_BG_COLOR

#define DEFAULT_BG_COLOR   0

Definition at line 45 of file ansi.c.

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

DEFAULT_SCREEN_MODE

#define DEFAULT_SCREEN_MODE   3

80x25

Definition at line 46 of file ansi.c.

Referenced by execute_code().

FONT_WIDTH

#define FONT_WIDTH   8

Font width.

Definition at line 48 of file ansi.c.

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

MAX_NB_ARGS

#define MAX_NB_ARGS   4

Definition at line 75 of file ansi.c.

Referenced by decode_frame(), and execute_code().

COLOR

#define COLOR

(

x

)

Value:

((x) * 40 + 55)

Referenced by config_input(), envelope_instant(), envelope_instant16(), envelope_peak(), envelope_peak16(), filter_frame(), query_formats(), set_palette(), vectorscope16(), and vectorscope8().

GRAY

#define GRAY

(

x

)

Value:

((x) * 10 + 8)

Referenced by set_palette().

Function Documentation

decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 80 of file ansi.c.

set_palette()

static void set_palette ( uint32_t * pal )

static

Definition at line 107 of file ansi.c.

Referenced by decode_frame(), and execute_code().

hscroll()

static void hscroll ( AVCodecContext * avctx )

static

Definition at line 122 of file ansi.c.

Referenced by decode_frame(), and draw_char().

erase_line()

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

static

Definition at line 142 of file ansi.c.

Referenced by execute_code().

erase_screen()

static void erase_screen ( AVCodecContext * avctx )

static

Definition at line 151 of file ansi.c.

Referenced by decode_frame(), and execute_code().

draw_char()

static void draw_char ( AVCodecContext * avctx, int c )

static

Draw character to screen.

Definition at line 163 of file ansi.c.

Referenced by decode_frame().

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 190 of file ansi.c.

Referenced by decode_frame().

decode_frame()

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

static

Definition at line 356 of file ansi.c.

decode_close()

static av_cold int decode_close ( AVCodecContext * avctx )

static

Definition at line 469 of file ansi.c.

Variable Documentation

ansi_to_cga

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 51 of file ansi.c.

Referenced by execute_code().

ansi_defaults

const FFCodecDefault ansi_defaults[]

static

Initial value:

= {
    { "max_pixels", "640*480" },
    { NULL },
}

Definition at line 477 of file ansi.c.

ff_ansi_decoder

const FFCodec ff_ansi_decoder

Initial value:

= {
    .p.name         = "ansi",
    CODEC_LONG_NAME("ASCII/ANSI art"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_ANSI,
    .priv_data_size = sizeof(AnsiContext),
    .init           = decode_init,
    .close          = decode_close,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .defaults       = ansi_defaults,
}

Definition at line 482 of file ansi.c.