dvdsubenc.c File Reference

#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "dvdsub.h"
#include "libavutil/avassert.h"
#include "libavutil/bprint.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures
struct	DVDSubtitleContext

Macros
#define	PUTNIBBLE(val)
#define	OFFSET(x)   offsetof(DVDSubtitleContext, x)
#define	SE   AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Functions
static void	dvd_encode_rle (uint8_t **pq, const uint8_t *bitmap, int linesize, int w, int h, const int cmap[256])
static int	color_distance (uint32_t a, uint32_t b)
static void	count_colors (AVCodecContext *avctx, unsigned hits[33], const AVSubtitleRect *r)
	Count colors used in a rectangle, quantizing alpha and grouping by nearest global palette entry. More...
static void	select_palette (AVCodecContext *avctx, int out_palette[4], int out_alpha[4], unsigned hits[33])
static void	build_color_map (AVCodecContext *avctx, int cmap[], const uint32_t palette[], const int out_palette[], unsigned int const out_alpha[])
static void	copy_rectangle (AVSubtitleRect *dst, AVSubtitleRect *src, int cmap[])
static int	encode_dvd_subtitles (AVCodecContext *avctx, uint8_t *outbuf, int outbuf_size, const AVSubtitle *h)
static int	bprint_to_extradata (AVCodecContext *avctx, struct AVBPrint *buf)
static int	dvdsub_init (AVCodecContext *avctx)
static int	dvdsub_encode (AVCodecContext *avctx, unsigned char *buf, int buf_size, const AVSubtitle *sub)

Variables
static const AVOption	options []
static const AVClass	dvdsubenc_class
const FFCodec	ff_dvdsub_encoder

Macro Definition Documentation

PUTNIBBLE

#define PUTNIBBLE

(

val

)

Value:

do {\
    if (ncnt++ & 1)\
        *q++ = bitbuf | ((val) & 0x0f);\
    else\
        bitbuf = (val) << 4;\
} while(0)

Definition at line 38 of file dvdsubenc.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DVDSubtitleContext, x)

Definition at line 488 of file dvdsubenc.c.

SE

#define SE   AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 489 of file dvdsubenc.c.

Function Documentation

dvd_encode_rle()

static void dvd_encode_rle ( uint8_t **  pq, const uint8_t *  bitmap, int  linesize, int  w, int  h, const int  cmap[256]  )

static

Definition at line 46 of file dvdsubenc.c.

Referenced by encode_dvd_subtitles().

color_distance()

static int color_distance ( uint32_t  a, uint32_t  b  )

static

Definition at line 99 of file dvdsubenc.c.

Referenced by build_color_map(), count_colors(), and select_palette().

count_colors()

static void count_colors ( AVCodecContext *  avctx, unsigned  hits[33], const AVSubtitleRect *  r  )

static

Count colors used in a rectangle, quantizing alpha and grouping by nearest global palette entry.

Definition at line 118 of file dvdsubenc.c.

Referenced by encode_dvd_subtitles().

select_palette()

static void select_palette ( AVCodecContext *  avctx, int  out_palette[4], int  out_alpha[4], unsigned  hits[33]  )

static

Definition at line 155 of file dvdsubenc.c.

Referenced by encode_dvd_subtitles().

build_color_map()

static void build_color_map ( AVCodecContext *  avctx, int  cmap[], const uint32_t  palette[], const int  out_palette[], unsigned int const  out_alpha[]  )

static

Definition at line 213 of file dvdsubenc.c.

Referenced by encode_dvd_subtitles().

copy_rectangle()

static void copy_rectangle ( AVSubtitleRect *  dst, AVSubtitleRect *  src, int  cmap[]  )

static

Definition at line 236 of file dvdsubenc.c.

Referenced by encode_dvd_subtitles().

encode_dvd_subtitles()

static int encode_dvd_subtitles ( AVCodecContext *  avctx, uint8_t *  outbuf, int  outbuf_size, const AVSubtitle *  h  )

static

Definition at line 252 of file dvdsubenc.c.

Referenced by dvdsub_encode().

bprint_to_extradata()

static int bprint_to_extradata ( AVCodecContext *  avctx, struct AVBPrint *  buf  )

static

Definition at line 420 of file dvdsubenc.c.

Referenced by dvdsub_init().

dvdsub_init()

static int dvdsub_init ( AVCodecContext *  avctx )

static

Definition at line 443 of file dvdsubenc.c.

dvdsub_encode()

static int dvdsub_encode ( AVCodecContext *  avctx, unsigned char *  buf, int  buf_size, const AVSubtitle *  sub  )

static

Definition at line 477 of file dvdsubenc.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    {"palette", "set the global palette", OFFSET(palette_str), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, SE },
    {"even_rows_fix", "Make number of rows even (workaround for some players)", OFFSET(even_rows_fix), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, SE},
    { NULL },
}

Definition at line 490 of file dvdsubenc.c.

dvdsubenc_class

const AVClass dvdsubenc_class

static

Initial value:

= {
    .class_name = "VOBSUB subtitle encoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 496 of file dvdsubenc.c.

ff_dvdsub_encoder

const FFCodec ff_dvdsub_encoder

Initial value:

= {
    .p.name         = "dvdsub",
    CODEC_LONG_NAME("DVD subtitles"),
    .p.type         = AVMEDIA_TYPE_SUBTITLE,
    .p.id           = AV_CODEC_ID_DVD_SUBTITLE,
    .init           = dvdsub_init,
    FF_CODEC_ENCODE_SUB_CB(dvdsub_encode),
    .p.priv_class   = &dvdsubenc_class,
    .priv_data_size = sizeof(DVDSubtitleContext),
}

Definition at line 503 of file dvdsubenc.c.