dvbsubdec.c File Reference

#include "avcodec.h"
#include "get_bits.h"
#include "bytestream.h"
#include "internal.h"
#include "libavutil/colorspace.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/thread.h"

Go to the source code of this file.

Data Structures
struct	DVBSubCLUT
struct	DVBSubObjectDisplay
struct	DVBSubObject
struct	DVBSubRegionDisplay
struct	DVBSubRegion
struct	DVBSubDisplayDefinition
struct	DVBSubContext

Macros
#define	DVBSUB_PAGE_SEGMENT   0x10
#define	DVBSUB_REGION_SEGMENT   0x11
#define	DVBSUB_CLUT_SEGMENT   0x12
#define	DVBSUB_OBJECT_SEGMENT   0x13
#define	DVBSUB_DISPLAYDEFINITION_SEGMENT   0x14
#define	DVBSUB_DISPLAY_SEGMENT   0x80
#define	cm   (ff_crop_tab + MAX_NEG_CROP)
#define	RGBA(r, g, b, a)   (((unsigned)(a) << 24) | ((r) << 16) | ((g) << 8) | (b))
#define	V(x, y)   rect->data[0][(x) + (y)*stride]
#define	L(x, y)   list[d[(x) + (y)*stride]]
#define	DS   AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM
#define	OFFSET(x)   offsetof(DVBSubContext, x)

Functions
static DVBSubObject *	get_object (DVBSubContext *ctx, int object_id)
static DVBSubCLUT *	get_clut (DVBSubContext *ctx, int clut_id)
static DVBSubRegion *	get_region (DVBSubContext *ctx, int region_id)
static void	delete_region_display_list (DVBSubContext *ctx, DVBSubRegion *region)
static void	delete_cluts (DVBSubContext *ctx)
static void	delete_objects (DVBSubContext *ctx)
static void	delete_regions (DVBSubContext *ctx)
static av_cold void	init_default_clut (void)
static av_cold int	dvbsub_init_decoder (AVCodecContext *avctx)
static av_cold int	dvbsub_close_decoder (AVCodecContext *avctx)
static int	dvbsub_read_2bit_string (AVCodecContext *avctx, uint8_t *destbuf, int dbuf_len, const uint8_t **srcbuf, int buf_size, int non_mod, uint8_t *map_table, int x_pos)
static int	dvbsub_read_4bit_string (AVCodecContext *avctx, uint8_t *destbuf, int dbuf_len, const uint8_t **srcbuf, int buf_size, int non_mod, uint8_t *map_table, int x_pos)
static int	dvbsub_read_8bit_string (AVCodecContext *avctx, uint8_t *destbuf, int dbuf_len, const uint8_t **srcbuf, int buf_size, int non_mod, uint8_t *map_table, int x_pos)
static void	compute_default_clut (DVBSubContext *ctx, uint8_t *clut, AVSubtitleRect *rect, int w, int h)
static int	save_subtitle_set (AVCodecContext *avctx, AVSubtitle *sub, int *got_output)
static void	dvbsub_parse_pixel_data_block (AVCodecContext *avctx, DVBSubObjectDisplay *display, const uint8_t *buf, int buf_size, int top_bottom, int non_mod)
static int	dvbsub_parse_object_segment (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	dvbsub_parse_clut_segment (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	dvbsub_parse_region_segment (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	dvbsub_parse_page_segment (AVCodecContext *avctx, const uint8_t *buf, int buf_size, AVSubtitle *sub, int *got_output)
static int	dvbsub_parse_display_definition_segment (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	dvbsub_display_end_segment (AVCodecContext *avctx, const uint8_t *buf, int buf_size, AVSubtitle *sub, int *got_output)
static int	dvbsub_decode (AVCodecContext *avctx, void *data, int *got_sub_ptr, AVPacket *avpkt)

Variables
static DVBSubCLUT	default_clut
static const AVOption	options []
static const AVClass	dvbsubdec_class
const AVCodec	ff_dvbsub_decoder

Macro Definition Documentation

DVBSUB_PAGE_SEGMENT

#define DVBSUB_PAGE_SEGMENT   0x10

Definition at line 31 of file dvbsubdec.c.

DVBSUB_REGION_SEGMENT

#define DVBSUB_REGION_SEGMENT   0x11

Definition at line 32 of file dvbsubdec.c.

DVBSUB_CLUT_SEGMENT

#define DVBSUB_CLUT_SEGMENT   0x12

Definition at line 33 of file dvbsubdec.c.

DVBSUB_OBJECT_SEGMENT

#define DVBSUB_OBJECT_SEGMENT   0x13

Definition at line 34 of file dvbsubdec.c.

DVBSUB_DISPLAYDEFINITION_SEGMENT

#define DVBSUB_DISPLAYDEFINITION_SEGMENT   0x14

Definition at line 35 of file dvbsubdec.c.

DVBSUB_DISPLAY_SEGMENT

#define DVBSUB_DISPLAY_SEGMENT   0x80

Definition at line 36 of file dvbsubdec.c.

cm

#define cm   (ff_crop_tab + MAX_NEG_CROP)

Definition at line 38 of file dvbsubdec.c.

RGBA

#define RGBA	(		r,
			g,
			b,
			a
	)		(((unsigned)(a) << 24) | ((r) << 16) | ((g) << 8) | (b))

Definition at line 40 of file dvbsubdec.c.

V

#define V	(		x,
			y
	)		rect->data[0][(x) + (y)*stride]

L

#define L	(		x,
			y
	)		list[d[(x) + (y)*stride]]

DS

#define DS   AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM

Definition at line 1727 of file dvbsubdec.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DVBSubContext, x)

Definition at line 1728 of file dvbsubdec.c.

Function Documentation

get_object()

static DVBSubObject* get_object ( DVBSubContext *  ctx, int  object_id  )

static

Definition at line 143 of file dvbsubdec.c.

Referenced by delete_region_display_list(), dvbsub_parse_object_segment(), and dvbsub_parse_region_segment().

get_clut()

static DVBSubCLUT* get_clut ( DVBSubContext *  ctx, int  clut_id  )

static

Definition at line 154 of file dvbsubdec.c.

Referenced by dvbsub_parse_clut_segment(), and save_subtitle_set().

get_region()

static DVBSubRegion* get_region ( DVBSubContext *  ctx, int  region_id  )

static

Definition at line 165 of file dvbsubdec.c.

Referenced by dvbsub_parse_pixel_data_block(), dvbsub_parse_region_segment(), and save_subtitle_set().

delete_region_display_list()

static void delete_region_display_list ( DVBSubContext *  ctx, DVBSubRegion *  region  )

static

Definition at line 176 of file dvbsubdec.c.

Referenced by delete_regions(), and dvbsub_parse_region_segment().

delete_cluts()

static void delete_cluts ( DVBSubContext *  ctx )

static

Definition at line 222 of file dvbsubdec.c.

Referenced by dvbsub_close_decoder(), and dvbsub_parse_page_segment().

delete_objects()

static void delete_objects ( DVBSubContext *  ctx )

static

Definition at line 233 of file dvbsubdec.c.

Referenced by dvbsub_close_decoder(), and dvbsub_parse_page_segment().

delete_regions()

static void delete_regions ( DVBSubContext *  ctx )

static

Definition at line 244 of file dvbsubdec.c.

Referenced by dvbsub_close_decoder(), and dvbsub_parse_page_segment().

init_default_clut()

static av_cold void init_default_clut ( void  )

static

Definition at line 258 of file dvbsubdec.c.

Referenced by dvbsub_init_decoder().

dvbsub_init_decoder()

static av_cold int dvbsub_init_decoder ( AVCodecContext *  avctx )

static

Definition at line 323 of file dvbsubdec.c.

dvbsub_close_decoder()

static av_cold int dvbsub_close_decoder ( AVCodecContext *  avctx )

static

Definition at line 354 of file dvbsubdec.c.

dvbsub_read_2bit_string()

static int dvbsub_read_2bit_string ( AVCodecContext *  avctx, uint8_t *  destbuf, int  dbuf_len, const uint8_t **  srcbuf, int  buf_size, int  non_mod, uint8_t *  map_table, int  x_pos  )

static

Definition at line 377 of file dvbsubdec.c.

Referenced by dvbsub_parse_pixel_data_block().

dvbsub_read_4bit_string()

static int dvbsub_read_4bit_string ( AVCodecContext *  avctx, uint8_t *  destbuf, int  dbuf_len, const uint8_t **  srcbuf, int  buf_size, int  non_mod, uint8_t *  map_table, int  x_pos  )

static

Definition at line 485 of file dvbsubdec.c.

Referenced by dvbsub_parse_pixel_data_block().

dvbsub_read_8bit_string()

static int dvbsub_read_8bit_string ( AVCodecContext *  avctx, uint8_t *  destbuf, int  dbuf_len, const uint8_t **  srcbuf, int  buf_size, int  non_mod, uint8_t *  map_table, int  x_pos  )

static

Definition at line 608 of file dvbsubdec.c.

Referenced by dvbsub_parse_pixel_data_block().

compute_default_clut()

static void compute_default_clut ( DVBSubContext *  ctx, uint8_t *  clut, AVSubtitleRect *  rect, int  w, int  h  )

static

Definition at line 662 of file dvbsubdec.c.

Referenced by save_subtitle_set().

save_subtitle_set()

static int save_subtitle_set ( AVCodecContext *  avctx, AVSubtitle *  sub, int *  got_output  )

static

Definition at line 728 of file dvbsubdec.c.

Referenced by dvbsub_display_end_segment(), and dvbsub_parse_page_segment().

dvbsub_parse_pixel_data_block()

static void dvbsub_parse_pixel_data_block ( AVCodecContext *  avctx, DVBSubObjectDisplay *  display, const uint8_t *  buf, int  buf_size, int  top_bottom, int  non_mod  )

static

Definition at line 862 of file dvbsubdec.c.

Referenced by dvbsub_parse_object_segment().

dvbsub_parse_object_segment()

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

static

Definition at line 980 of file dvbsubdec.c.

Referenced by dvbsub_decode().

dvbsub_parse_clut_segment()

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

static

Definition at line 1044 of file dvbsubdec.c.

Referenced by dvbsub_decode().

dvbsub_parse_region_segment()

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

static

Definition at line 1141 of file dvbsubdec.c.

Referenced by dvbsub_decode().

dvbsub_parse_page_segment()

static int dvbsub_parse_page_segment ( AVCodecContext *  avctx, const uint8_t *  buf, int  buf_size, AVSubtitle *  sub, int *  got_output  )

static

Definition at line 1289 of file dvbsubdec.c.

Referenced by dvbsub_decode().

dvbsub_parse_display_definition_segment()

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

static

Definition at line 1549 of file dvbsubdec.c.

Referenced by dvbsub_decode().

dvbsub_display_end_segment()

static int dvbsub_display_end_segment ( AVCodecContext *  avctx, const uint8_t *  buf, int  buf_size, AVSubtitle *  sub, int *  got_output  )

static

Definition at line 1596 of file dvbsubdec.c.

Referenced by dvbsub_decode().

dvbsub_decode()

static int dvbsub_decode ( AVCodecContext *  avctx, void *  data, int *  got_sub_ptr, AVPacket *  avpkt  )

static

Definition at line 1609 of file dvbsubdec.c.

Variable Documentation

default_clut

DVBSubCLUT default_clut

static

Definition at line 53 of file dvbsubdec.c.

Referenced by dvbsub_parse_clut_segment(), init_default_clut(), and save_subtitle_set().

options

const AVOption options[]

static

Initial value:

= {
    {"compute_edt", "compute end of time using pts or timeout", OFFSET(compute_edt), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DS},
    {"compute_clut", "compute clut when not available(-1) or only once (-2) or always(1) or never(0)", OFFSET(compute_clut), AV_OPT_TYPE_BOOL, {.i64 = -1}, -2, 1, DS},
    {"dvb_substream", "", OFFSET(substream), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 63, DS},
    {NULL}
}

Definition at line 1729 of file dvbsubdec.c.

dvbsubdec_class

const AVClass dvbsubdec_class

static

Initial value:

= {
    .class_name = "DVB Sub Decoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 1735 of file dvbsubdec.c.

ff_dvbsub_decoder

const AVCodec ff_dvbsub_decoder

Initial value:

= {
    .name           = "dvbsub",
    .long_name      = NULL_IF_CONFIG_SMALL("DVB subtitles"),
    .type           = AVMEDIA_TYPE_SUBTITLE,
    .id             = AV_CODEC_ID_DVB_SUBTITLE,
    .priv_data_size = sizeof(DVBSubContext),
    .init           = dvbsub_init_decoder,
    .close          = dvbsub_close_decoder,
    .decode         = dvbsub_decode,
    .priv_class     = &dvbsubdec_class,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 1742 of file dvbsubdec.c.