dvdsubdec.c File Reference

#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "dvdsub.h"
#include "get_bits.h"
#include "libavutil/attributes.h"
#include "libavutil/colorspace.h"
#include "libavutil/file_open.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/bswap.h"

Go to the source code of this file.

Data Structures
struct	DVDSubContext

Macros
#define	READ_OFFSET(a)   (big_offsets ? AV_RB32(a) : AV_RB16(a))
#define	OFFSET(field)   offsetof(DVDSubContext, field)
#define	SD   AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM

Functions
static void	yuv_a_to_rgba (const uint8_t *ycbcr, const uint8_t *alpha, uint32_t *rgba, int num_values)
static int	decode_run_2bit (GetBitContext *gb, int *color)
static int	decode_run_8bit (GetBitContext *gb, int *color)
static int	decode_rle (uint8_t *bitmap, int linesize, int w, int h, uint8_t used_color[256], const uint8_t *buf, int start, int buf_size, int is_8bit)
static void	guess_palette (DVDSubContext *ctx, uint32_t *rgba_palette, uint32_t subtitle_color)
static void	reset_rects (AVSubtitle *sub_header)
static int	decode_dvd_subtitles (void *logctx, DVDSubContext *ctx, AVSubtitle *sub_header, const uint8_t *buf, int buf_size)
static int	is_transp (const uint8_t *buf, int pitch, int n, const uint8_t *transp_color)
static int	find_smallest_bounding_rectangle (DVDSubContext *ctx, AVSubtitle *s)
static int	append_to_cached_buf (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	dvdsub_decode (AVCodecContext *avctx, AVSubtitle *sub, int *data_size, const AVPacket *avpkt)
static int	parse_ifo_palette (void *logctx, DVDSubContext *ctx, char *p)
static int	dvdsub_parse_extradata (AVCodecContext *avctx)
static av_cold int	dvdsub_init (AVCodecContext *avctx)
static void	dvdsub_flush (AVCodecContext *avctx)

Variables
static const AVOption	options []
static const AVClass	dvdsub_class
const FFCodec	ff_dvdsub_decoder

Macro Definition Documentation

READ_OFFSET

#define READ_OFFSET

(

a

)

(big_offsets ? AV_RB32(a) : AV_RB16(a))

Definition at line 218 of file dvdsubdec.c.

OFFSET

#define OFFSET

(

field

)

offsetof(DVDSubContext, field)

Definition at line 695 of file dvdsubdec.c.

SD

#define SD   AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 696 of file dvdsubdec.c.

Function Documentation

yuv_a_to_rgba()

static void yuv_a_to_rgba ( const uint8_t *  ycbcr, const uint8_t *  alpha, uint32_t *  rgba, int  num_values  )

static

Definition at line 50 of file dvdsubdec.c.

Referenced by decode_dvd_subtitles().

decode_run_2bit()

static int decode_run_2bit ( GetBitContext *  gb, int *  color  )

static

Definition at line 67 of file dvdsubdec.c.

Referenced by decode_rle().

decode_run_8bit()

static int decode_run_8bit ( GetBitContext *  gb, int *  color  )

static

Definition at line 81 of file dvdsubdec.c.

Referenced by decode_rle().

decode_rle()

static int decode_rle ( uint8_t *  bitmap, int  linesize, int  w, int  h, uint8_t  used_color[256], const uint8_t *  buf, int  start, int  buf_size, int  is_8bit  )

static

Definition at line 100 of file dvdsubdec.c.

Referenced by decode_dvd_subtitles().

guess_palette()

static void guess_palette ( DVDSubContext *  ctx, uint32_t *  rgba_palette, uint32_t  subtitle_color  )

static

Definition at line 146 of file dvdsubdec.c.

Referenced by decode_dvd_subtitles().

reset_rects()

static void reset_rects ( AVSubtitle *  sub_header )

static

Definition at line 203 of file dvdsubdec.c.

Referenced by decode_dvd_subtitles(), and dvdsub_decode().

decode_dvd_subtitles()

static int decode_dvd_subtitles ( void *  logctx, DVDSubContext *  ctx, AVSubtitle *  sub_header, const uint8_t *  buf, int  buf_size  )

static

Definition at line 220 of file dvdsubdec.c.

Referenced by dvdsub_decode().

is_transp()

static int is_transp ( const uint8_t *  buf, int  pitch, int  n, const uint8_t *  transp_color  )

static

Definition at line 429 of file dvdsubdec.c.

Referenced by find_smallest_bounding_rectangle().

find_smallest_bounding_rectangle()

static int find_smallest_bounding_rectangle ( DVDSubContext *  ctx, AVSubtitle *  s  )

static

Definition at line 442 of file dvdsubdec.c.

Referenced by dvdsub_decode().

append_to_cached_buf()

static int append_to_cached_buf ( AVCodecContext *  avctx, const uint8_t *  buf, int  buf_size  )

static

Definition at line 501 of file dvdsubdec.c.

Referenced by dvdsub_decode().

dvdsub_decode()

static int dvdsub_decode ( AVCodecContext *  avctx, AVSubtitle *  sub, int *  data_size, const AVPacket *  avpkt  )

static

Definition at line 518 of file dvdsubdec.c.

parse_ifo_palette()

static int parse_ifo_palette ( void *  logctx, DVDSubContext *  ctx, char *  p  )

static

Definition at line 563 of file dvdsubdec.c.

Referenced by dvdsub_init().

dvdsub_parse_extradata()

static int dvdsub_parse_extradata ( AVCodecContext *  avctx )

static

Definition at line 623 of file dvdsubdec.c.

Referenced by dvdsub_init().

dvdsub_init()

static av_cold int dvdsub_init ( AVCodecContext *  avctx )

static

Definition at line 664 of file dvdsubdec.c.

dvdsub_flush()

static void dvdsub_flush ( AVCodecContext *  avctx )

static

Definition at line 689 of file dvdsubdec.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, SD },
    { "ifo_palette", "obtain the global palette from .IFO file", OFFSET(ifo_str), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, SD },
    { "forced_subs_only", "Only show forced subtitles", OFFSET(forced_subs_only), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, SD},
    { NULL }
}

Definition at line 697 of file dvdsubdec.c.

dvdsub_class

const AVClass dvdsub_class

static

Initial value:

= {
    .class_name = "dvdsubdec",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 703 of file dvdsubdec.c.

ff_dvdsub_decoder

const FFCodec ff_dvdsub_decoder

Initial value:

= {
    .p.name         = "dvdsub",
    CODEC_LONG_NAME("DVD subtitles"),
    .p.type         = AVMEDIA_TYPE_SUBTITLE,
    .p.id           = AV_CODEC_ID_DVD_SUBTITLE,
    .priv_data_size = sizeof(DVDSubContext),
    .init           = dvdsub_init,
    FF_CODEC_DECODE_SUB_CB(dvdsub_decode),
    .flush          = dvdsub_flush,
    .p.priv_class   = &dvdsub_class,
}

Definition at line 710 of file dvdsubdec.c.