#include "libavutil/imgutils.h"
#include "libavutil/common.h"
#include "libavutil/cpu.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "gradfun.h"
#include "internal.h"
#include "video.h"
Go to the source code of this file.
Functions | |
| void | ff_gradfun_filter_line_c (uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers) |
| void | ff_gradfun_blur_line_c (uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width) |
| static void | filter (GradFunContext *ctx, uint8_t *dst, const uint8_t *src, int width, int height, int dst_linesize, int src_linesize, int r) |
| static av_cold int | init (AVFilterContext *ctx, const char *args) |
| static av_cold void | uninit (AVFilterContext *ctx) |
| static int | query_formats (AVFilterContext *ctx) |
| static int | config_input (AVFilterLink *inlink) |
| static int | null_draw_slice (AVFilterLink *link, int y, int h, int slice_dir) |
| static int | end_frame (AVFilterLink *inlink) |
Variables | |
| static const uint16_t | dither [8][8] |
| AVFilter | avfilter_vf_gradfun |
Apply a boxblur debanding algorithm (based on the gradfun2db Avisynth filter by prunedtree). Foreach pixel, if it's within threshold of the blurred value, make it closer. So now we have a smoothed and higher bitdepth version of all the shallow gradients, while leaving detailed areas untouched. Dither it back to 8bit.
Definition in file vf_gradfun.c.
| static int config_input | ( | AVFilterLink * | inlink | ) | [static] |
Definition at line 167 of file vf_gradfun.c.
| static int end_frame | ( | AVFilterLink * | inlink | ) | [static] |
Definition at line 189 of file vf_gradfun.c.
| static void filter | ( | GradFunContext * | ctx, | |
| uint8_t * | dst, | |||
| const uint8_t * | src, | |||
| int | width, | |||
| int | height, | |||
| int | dst_linesize, | |||
| int | src_linesize, | |||
| int | r | |||
| ) | [static] |
Definition at line 81 of file vf_gradfun.c.
| static av_cold int init | ( | AVFilterContext * | ctx, | |
| const char * | args | |||
| ) | [static] |
Definition at line 122 of file vf_gradfun.c.
| static int null_draw_slice | ( | AVFilterLink * | link, | |
| int | y, | |||
| int | h, | |||
| int | slice_dir | |||
| ) | [static] |
Definition at line 184 of file vf_gradfun.c.
| static int query_formats | ( | AVFilterContext * | ctx | ) | [static] |
Definition at line 152 of file vf_gradfun.c.
| static av_cold void uninit | ( | AVFilterContext * | ctx | ) | [static] |
Definition at line 146 of file vf_gradfun.c.
Initial value:
{
.name = "gradfun",
.description = NULL_IF_CONFIG_SMALL("Debands video quickly using gradients."),
.priv_size = sizeof(GradFunContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.start_frame = ff_inplace_start_frame,
.draw_slice = null_draw_slice,
.end_frame = end_frame,
.min_perms = AV_PERM_READ, },
{ .name = NULL}},
.outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
}
Definition at line 219 of file vf_gradfun.c.
const uint16_t dither[8][8] [static] |
Initial value:
{
{0x00,0x60,0x18,0x78,0x06,0x66,0x1E,0x7E},
{0x40,0x20,0x58,0x38,0x46,0x26,0x5E,0x3E},
{0x10,0x70,0x08,0x68,0x16,0x76,0x0E,0x6E},
{0x50,0x30,0x48,0x28,0x56,0x36,0x4E,0x2E},
{0x04,0x64,0x1C,0x7C,0x02,0x62,0x1A,0x7A},
{0x44,0x24,0x5C,0x3C,0x42,0x22,0x5A,0x3A},
{0x14,0x74,0x0C,0x6C,0x12,0x72,0x0A,0x6A},
{0x54,0x34,0x4C,0x2C,0x52,0x32,0x4A,0x2A},
}
Definition at line 45 of file vf_gradfun.c.
1.5.8