Libav
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blur / sharpen filter, ported to Libav from MPlayer libmpcodecs/unsharp.c. More...
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
Go to the source code of this file.
Data Structures | |
struct | FilterParam |
struct | UnsharpContext |
Macros | |
#define | MIN_SIZE 3 |
#define | MAX_SIZE 13 |
#define | SHIFTUP(x, shift) (-((-(x))>>(shift))) |
#define | OFFSET(x) offsetof(UnsharpContext, x) |
#define | FLAGS AV_OPT_FLAG_VIDEO_PARAM |
Functions | |
static void | apply_unsharp (uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int width, int height, FilterParam *fp) |
static void | set_filter_param (FilterParam *fp, int msize_x, int msize_y, float amount) |
static av_cold int | init (AVFilterContext *ctx) |
static int | query_formats (AVFilterContext *ctx) |
static void | init_filter_param (AVFilterContext *ctx, FilterParam *fp, const char *effect_type, int width) |
static int | config_props (AVFilterLink *link) |
static void | free_filter_param (FilterParam *fp) |
static av_cold void | uninit (AVFilterContext *ctx) |
static int | filter_frame (AVFilterLink *link, AVFrame *in) |
Variables | |
static const AVOption | options [] |
static const AVClass | unsharp_class |
static const AVFilterPad | avfilter_vf_unsharp_inputs [] |
static const AVFilterPad | avfilter_vf_unsharp_outputs [] |
AVFilter | ff_vf_unsharp |
blur / sharpen filter, ported to Libav from MPlayer libmpcodecs/unsharp.c.
This code is based on:
An Efficient algorithm for Gaussian blur using finite-state machines Frederick M. Waltz and John W. V. Miller
SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII Originally published Boston, Nov 98
http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf
Definition in file vf_unsharp.c.
#define MIN_SIZE 3 |
Definition at line 48 of file vf_unsharp.c.
#define MAX_SIZE 13 |
Definition at line 49 of file vf_unsharp.c.
Referenced by apply_unsharp().
#define SHIFTUP | ( | x, | |
shift | |||
) | (-((-(x))>>(shift))) |
Definition at line 52 of file vf_unsharp.c.
Referenced by config_props(), and filter_frame().
#define OFFSET | ( | x) | offsetof(UnsharpContext, x) |
Definition at line 229 of file vf_unsharp.c.
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM |
Definition at line 230 of file vf_unsharp.c.
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Definition at line 74 of file vf_unsharp.c.
Referenced by filter_frame().
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Definition at line 127 of file vf_unsharp.c.
Referenced by init().
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Definition at line 139 of file vf_unsharp.c.
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Definition at line 149 of file vf_unsharp.c.
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Definition at line 162 of file vf_unsharp.c.
Referenced by config_props().
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Definition at line 176 of file vf_unsharp.c.
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Definition at line 190 of file vf_unsharp.c.
Referenced by uninit().
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Definition at line 198 of file vf_unsharp.c.
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Definition at line 206 of file vf_unsharp.c.
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Definition at line 231 of file vf_unsharp.c.
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Definition at line 241 of file vf_unsharp.c.
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Definition at line 248 of file vf_unsharp.c.
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Definition at line 258 of file vf_unsharp.c.
AVFilter ff_vf_unsharp |
Definition at line 266 of file vf_unsharp.c.