vf_ocr.c File Reference

#include <tesseract/capi.h>
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	OCRContext

Macros
#define	OFFSET(x)   offsetof(OCRContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
static av_cold int	init (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (ocr)

Variables
static const AVOption	ocr_options []
static enum AVPixelFormat	pix_fmts []
static const AVFilterPad	ocr_inputs []
const AVFilter	ff_vf_ocr

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(OCRContext, x)

Definition at line 39 of file vf_ocr.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 40 of file vf_ocr.c.

Function Documentation

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 50 of file vf_ocr.c.

filter_frame()

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  in  )

static

Definition at line 87 of file vf_ocr.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 113 of file vf_ocr.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

ocr

)

Variable Documentation

ocr_options

const AVOption ocr_options[]

static

Initial value:

= {
    { "datapath",  "set datapath",            OFFSET(datapath),  AV_OPT_TYPE_STRING, {.str=NULL},  0, 0, FLAGS },
    { "language",  "set language",            OFFSET(language),  AV_OPT_TYPE_STRING, {.str="eng"}, 0, 0, FLAGS },
    { "whitelist", "set character whitelist", OFFSET(whitelist), AV_OPT_TYPE_STRING, {.str="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.:;,-+_!?\"'[]{}()<>|/\\=*&%$#@!~ "}, 0, 0, FLAGS },
    { "blacklist", "set character blacklist", OFFSET(blacklist), AV_OPT_TYPE_STRING, {.str=""},    0, 0, FLAGS },
    { NULL }
}

Definition at line 42 of file vf_ocr.c.

pix_fmts

enum AVPixelFormat pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_GRAY8,
    AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
    AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
    AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
    AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_YUVJ411P,
    AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
    AV_PIX_FMT_NONE
}

Definition at line 75 of file vf_ocr.c.

ocr_inputs

const AVFilterPad ocr_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
}

Definition at line 123 of file vf_ocr.c.

ff_vf_ocr

const AVFilter ff_vf_ocr

Initial value:

= {
    .name          = "ocr",
    .description   = NULL_IF_CONFIG_SMALL("Optical Character Recognition."),
    .priv_size     = sizeof(OCRContext),
    .priv_class    = &ocr_class,
    .init          = init,
    .uninit        = uninit,
    .flags         = AVFILTER_FLAG_METADATA_ONLY,
    FILTER_INPUTS(ocr_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
}

Definition at line 131 of file vf_ocr.c.