xsubenc.c File Reference

#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "put_bits.h"

Go to the source code of this file.

Macros
#define	PADDING   0
	Number of pixels to pad left and right.
#define	PADDING_COLOR   0

Functions
static void	put_xsub_rle (PutBitContext *pb, int len, int color)
	Encode a single color run.
static int	xsub_encode_rle (PutBitContext *pb, const uint8_t *bitmap, int linesize, int w, int h)
	Encode a 4-color bitmap with XSUB rle.
static int	make_tc (uint64_t ms, int *tc)
static int	xsub_encode (AVCodecContext *avctx, unsigned char *buf, int bufsize, const AVSubtitle *h)
static av_cold int	xsub_encoder_init (AVCodecContext *avctx)

Variables
const FFCodec	ff_xsub_encoder

Macro Definition Documentation

PADDING

#define PADDING   0

Number of pixels to pad left and right.

The official encoder pads the subtitles with two pixels on either side, but until we find out why, we won't do it (we will pad to have width divisible by 2 though).

Definition at line 35 of file xsubenc.c.

Referenced by xsub_encode(), and xsub_encode_rle().

PADDING_COLOR

#define PADDING_COLOR   0

Definition at line 36 of file xsubenc.c.

Referenced by xsub_encode(), and xsub_encode_rle().

Function Documentation

put_xsub_rle()

static void put_xsub_rle ( PutBitContext * pb, int len, int color )

static

Encode a single color run.

At most 16 bits will be used.

Parameters

len	length of the run, values > 255 mean "until end of line", may not be < 0.
color	color to encode, only the lowest two bits are used and all others must be 0.

Definition at line 43 of file xsubenc.c.

Referenced by xsub_encode(), and xsub_encode_rle().

xsub_encode_rle()

static int xsub_encode_rle ( PutBitContext * pb, const uint8_t * bitmap, int linesize, int w, int h )

static

Encode a 4-color bitmap with XSUB rle.

The encoded bitmap may be wider than the source bitmap due to padding.

Definition at line 57 of file xsubenc.c.

Referenced by xsub_encode().

make_tc()

static int make_tc ( uint64_t ms, int * tc )

static

Definition at line 102 of file xsubenc.c.

Referenced by xsub_encode().

xsub_encode()

static int xsub_encode ( AVCodecContext * avctx, unsigned char * buf, int bufsize, const AVSubtitle * h )

static

Definition at line 114 of file xsubenc.c.

xsub_encoder_init()

static av_cold int xsub_encoder_init ( AVCodecContext * avctx )

static

Definition at line 204 of file xsubenc.c.

Variable Documentation

ff_xsub_encoder

const FFCodec ff_xsub_encoder

Initial value:

= {
    .p.name     = "xsub",
    CODEC_LONG_NAME("DivX subtitles (XSUB)"),
    .p.type     = AVMEDIA_TYPE_SUBTITLE,
    .p.id       = AV_CODEC_ID_XSUB,
    .init       = xsub_encoder_init,
    FF_CODEC_ENCODE_SUB_CB(xsub_encode),
}

Definition at line 214 of file xsubenc.c.