vf_boxblur.c File Reference

Apply a boxblur filter to the input video. More...

#include "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "boxblur.h"

Go to the source code of this file.

Data Structures
struct	BoxBlurContext

Macros
#define	BLUR(type, depth)
#define	OFFSET(x)   offsetof(BoxBlurContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static void	blur (uint8_t *dst, int dst_step, const uint8_t *src, int src_step, int len, int radius, int pixsize)
static void	blur_power (uint8_t *dst, int dst_step, const uint8_t *src, int src_step, int len, int radius, int power, uint8_t *temp[2], int pixsize)
static void	hblur (uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
static void	vblur (uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
	AVFILTER_DEFINE_CLASS (boxblur)

Variables
static const AVOption	boxblur_options []
static const AVFilterPad	avfilter_vf_boxblur_inputs []
static const AVFilterPad	avfilter_vf_boxblur_outputs []
AVFilter	ff_vf_boxblur

Detailed Description

Apply a boxblur filter to the input video.

Ported from MPlayer libmpcodecs/vf_boxblur.c.

Definition in file vf_boxblur.c.

Macro Definition Documentation

#define BLUR	(		type,
			depth
	)

Value:

static inline void blur ## depth(type *dst, int dst_step, const type *src,  \
                                 int src_step, int len, int radius)         \
{                                                                           \
    const int length = radius*2 + 1;                                        \
    const int inv = ((1<<16) + length/2)/length;                            \
    int x, sum = src[radius*src_step];                                      \
                                                                            \
    for (x = 0; x < radius; x++)                                            \
        sum += src[x*src_step]<<1;                                          \
                                                                            \
    sum = sum*inv + (1<<15);                                                \
                                                                            \
    for (x = 0; x <= radius; x++) {                                         \
        sum += (src[(radius+x)*src_step] - src[(radius-x)*src_step])*inv;   \
        dst[x*dst_step] = sum>>16;                                          \
    }                                                                       \
                                                                            \
    for (; x < len-radius; x++) {                                           \
        sum += (src[(radius+x)*src_step] - src[(x-radius-1)*src_step])*inv; \
        dst[x*dst_step] = sum >>16;                                         \
    }                                                                       \
                                                                            \
    for (; x < len; x++) {                                                  \
        sum += (src[(2*len-radius-x-1)*src_step] - src[(x-radius-1)*src_step])*inv; \
        dst[x*dst_step] = sum>>16;                                          \
    }                                                                       \
}

Definition at line 126 of file vf_boxblur.c.

#define OFFSET

(

x

)

offsetof(BoxBlurContext, x)

Definition at line 265 of file vf_boxblur.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 266 of file vf_boxblur.c.

Function Documentation

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 50 of file vf_boxblur.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 58 of file vf_boxblur.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 75 of file vf_boxblur.c.

static void blur ( uint8_t *  dst, int  dst_step, const uint8_t *  src, int  src_step, int  len, int  radius, int  pixsize  )

inlinestatic

Definition at line 160 of file vf_boxblur.c.

Referenced by blur_power().

static void blur_power ( uint8_t *  dst, int  dst_step, const uint8_t *  src, int  src_step, int  len, int  radius, int  power, uint8_t *  temp[2], int  pixsize  )

inlinestatic

Definition at line 167 of file vf_boxblur.c.

Referenced by hblur(), and vblur().

static void hblur ( uint8_t *  dst, int  dst_linesize, const uint8_t *  src, int  src_linesize, int  w, int  h, int  radius, int  power, uint8_t *  temp[2], int  pixsize  )

static

Definition at line 201 of file vf_boxblur.c.

Referenced by filter_frame().

static void vblur ( uint8_t *  dst, int  dst_linesize, const uint8_t *  src, int  src_linesize, int  w, int  h, int  radius, int  power, uint8_t *  temp[2], int  pixsize  )

static

Definition at line 214 of file vf_boxblur.c.

Referenced by filter_frame().

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

static

Definition at line 227 of file vf_boxblur.c.

AVFILTER_DEFINE_CLASS

(

boxblur

)

Variable Documentation

const AVOption boxblur_options[]

static

Initial value:

= {
    { "luma_radius", "Radius of the luma blurring box", OFFSET(luma_param.radius_expr), AV_OPT_TYPE_STRING, {.str="2"}, .flags = FLAGS },
    { "lr",          "Radius of the luma blurring box", OFFSET(luma_param.radius_expr), AV_OPT_TYPE_STRING, {.str="2"}, .flags = FLAGS },
    { "luma_power",  "How many times should the boxblur be applied to luma",  OFFSET(luma_param.power), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, .flags = FLAGS },
    { "lp",          "How many times should the boxblur be applied to luma",  OFFSET(luma_param.power), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, .flags = FLAGS },

    { "chroma_radius", "Radius of the chroma blurring box", OFFSET(chroma_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
    { "cr",            "Radius of the chroma blurring box", OFFSET(chroma_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
    { "chroma_power",  "How many times should the boxblur be applied to chroma",  OFFSET(chroma_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
    { "cp",            "How many times should the boxblur be applied to chroma",  OFFSET(chroma_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },

    { "alpha_radius", "Radius of the alpha blurring box", OFFSET(alpha_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
    { "ar",           "Radius of the alpha blurring box", OFFSET(alpha_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
    { "alpha_power",  "How many times should the boxblur be applied to alpha",  OFFSET(alpha_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
    { "ap",           "How many times should the boxblur be applied to alpha",  OFFSET(alpha_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },

    { NULL }
}

Definition at line 268 of file vf_boxblur.c.

const AVFilterPad avfilter_vf_boxblur_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_input,
        .filter_frame = filter_frame,
    },
    { NULL }
}

Definition at line 289 of file vf_boxblur.c.

const AVFilterPad avfilter_vf_boxblur_outputs[]

static

Initial value:

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

Definition at line 299 of file vf_boxblur.c.

AVFilter ff_vf_boxblur

Initial value:

= {
    .name          = "boxblur",
    .description   = NULL_IF_CONFIG_SMALL("Blur the input."),
    .priv_size     = sizeof(BoxBlurContext),
    .priv_class    = &boxblur_class,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = avfilter_vf_boxblur_inputs,
    .outputs       = avfilter_vf_boxblur_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 307 of file vf_boxblur.c.