FFmpeg
Data Structures | Macros | Functions | Variables
ansi.c File Reference
#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"

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_ITALICS   0x04
 Italics (mode 3) 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...
 
static const AVCodecDefault ansi_defaults []
 
const AVCodec 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 35 of file ansi.c.

◆ ATTR_FAINT

#define ATTR_FAINT   0x02

Faint (mode 2)

Definition at line 36 of file ansi.c.

◆ ATTR_ITALICS

#define ATTR_ITALICS   0x04

Italics (mode 3)

Definition at line 37 of file ansi.c.

◆ ATTR_UNDERLINE

#define ATTR_UNDERLINE   0x08

Underline (mode 4)

Definition at line 38 of file ansi.c.

◆ ATTR_BLINK

#define ATTR_BLINK   0x10

Blink/Bright-background (mode 5)

Definition at line 39 of file ansi.c.

◆ ATTR_REVERSE

#define ATTR_REVERSE   0x40

Reverse (mode 7)

Definition at line 40 of file ansi.c.

◆ ATTR_CONCEALED

#define ATTR_CONCEALED   0x80

Concealed (mode 8)

Definition at line 41 of file ansi.c.

◆ DEFAULT_FG_COLOR

#define DEFAULT_FG_COLOR   7

CGA color index.

Definition at line 43 of file ansi.c.

◆ DEFAULT_BG_COLOR

#define DEFAULT_BG_COLOR   0

Definition at line 44 of file ansi.c.

◆ DEFAULT_SCREEN_MODE

#define DEFAULT_SCREEN_MODE   3

80x25

Definition at line 45 of file ansi.c.

◆ FONT_WIDTH

#define FONT_WIDTH   8

Font width.

Definition at line 47 of file ansi.c.

◆ MAX_NB_ARGS

#define MAX_NB_ARGS   4

Definition at line 74 of file ansi.c.

◆ COLOR

#define COLOR (   x)    ((x) * 40 + 55)

◆ GRAY

#define GRAY (   x)    ((x) * 10 + 8)

Function Documentation

◆ decode_init()

static av_cold int decode_init ( AVCodecContext avctx)
static

Definition at line 79 of file ansi.c.

◆ set_palette()

static void set_palette ( uint32_t *  pal)
static

Definition at line 106 of file ansi.c.

Referenced by decode_frame(), and execute_code().

◆ hscroll()

static void hscroll ( AVCodecContext avctx)
static

Definition at line 121 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 141 of file ansi.c.

Referenced by execute_code().

◆ erase_screen()

static void erase_screen ( AVCodecContext avctx)
static

Definition at line 150 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 162 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 189 of file ansi.c.

Referenced by decode_frame().

◆ decode_frame()

static int decode_frame ( AVCodecContext avctx,
void *  data,
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 470 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 50 of file ansi.c.

Referenced by execute_code().

◆ ansi_defaults

const AVCodecDefault ansi_defaults[]
static
Initial value:
= {
{ "max_pixels", "640*480" },
{ NULL },
}

Definition at line 478 of file ansi.c.

◆ ff_ansi_decoder

const AVCodec ff_ansi_decoder
Initial value:
= {
.name = "ansi",
.long_name = NULL_IF_CONFIG_SMALL("ASCII/ANSI art"),
.priv_data_size = sizeof(AnsiContext),
.close = decode_close,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 483 of file ansi.c.

AV_CODEC_ID_ANSI
@ AV_CODEC_ID_ANSI
Definition: codec_id.h:192
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
decode_close
static av_cold int decode_close(AVCodecContext *avctx)
Definition: ansi.c:470
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
AnsiContext
Definition: ansi.c:54
defaults
static const AVCodecDefault defaults[]
Definition: amfenc_h264.c:361
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
ansi_defaults
static const AVCodecDefault ansi_defaults[]
Definition: ansi.c:478
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
decode_frame
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ansi.c:356
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: ansi.c:79