308 lines
9.6 KiB
C
308 lines
9.6 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2020 Paul B Mahol
|
||
|
|
*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with FFmpeg; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "libavutil/imgutils.h"
|
||
|
|
#include "libavutil/opt.h"
|
||
|
|
#include "libavutil/pixdesc.h"
|
||
|
|
#include "avfilter.h"
|
||
|
|
#include "formats.h"
|
||
|
|
#include "internal.h"
|
||
|
|
#include "video.h"
|
||
|
|
|
||
|
|
typedef struct DBlurContext {
|
||
|
|
const AVClass *class;
|
||
|
|
|
||
|
|
float angle;
|
||
|
|
float radius;
|
||
|
|
int planes;
|
||
|
|
|
||
|
|
float b0, b1, q, c, R3;
|
||
|
|
|
||
|
|
int depth;
|
||
|
|
int planewidth[4];
|
||
|
|
int planeheight[4];
|
||
|
|
float *buffer;
|
||
|
|
int nb_planes;
|
||
|
|
void (*horiz_slice)(float *buffer, int width, int height, int steps, float nu, float bscale);
|
||
|
|
} DBlurContext;
|
||
|
|
|
||
|
|
#define OFFSET(x) offsetof(DBlurContext, x)
|
||
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
|
||
|
|
|
||
|
|
static const AVOption dblur_options[] = {
|
||
|
|
{ "angle", "set angle", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl=45}, 0.0, 360, FLAGS },
|
||
|
|
{ "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_FLOAT, {.dbl=5}, 1, 8192, FLAGS },
|
||
|
|
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
|
||
|
|
{ NULL }
|
||
|
|
};
|
||
|
|
|
||
|
|
AVFILTER_DEFINE_CLASS(dblur);
|
||
|
|
|
||
|
|
#define f(n, m) (dst[(n) * width + (m)])
|
||
|
|
|
||
|
|
static int filter_horizontally(AVFilterContext *ctx, int width, int height)
|
||
|
|
{
|
||
|
|
DBlurContext *s = ctx->priv;
|
||
|
|
const float b0 = s->b0;
|
||
|
|
const float b1 = s->b1;
|
||
|
|
const float q = s->q;
|
||
|
|
const float c = s->c;
|
||
|
|
float *dst = s->buffer;
|
||
|
|
float g;
|
||
|
|
|
||
|
|
if (s->R3 > 0) {
|
||
|
|
for (int y = 1; y < height - 1; y++) {
|
||
|
|
g = q * f(0, 0) + c * f(0, 0);
|
||
|
|
for (int x = 0; x < width; x++) {
|
||
|
|
f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
|
||
|
|
g = q * f(y, x) + c * f(y - 1, x);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (int y = height - 2; y >= 0; y--) {
|
||
|
|
g = q * f(y, width - 1) + c * f(y, width - 1);
|
||
|
|
for (int x = width - 1; x >= 0; x--) {
|
||
|
|
f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
|
||
|
|
g = q * f(y, x) + c * f(y + 1, x);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
for (int y = 1; y < height - 1; y++) {
|
||
|
|
g = q * f(0, width - 1) + c * f(0, width - 1);
|
||
|
|
for (int x = width - 1; x >= 0; x--) {
|
||
|
|
f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
|
||
|
|
g = q * f(y, x) + c * f(y - 1, x);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (int y = height - 2; y >= 0; y--) {
|
||
|
|
g = q * f(y, 0) + c * f(y, 0);
|
||
|
|
for (int x = 0; x < width; x++) {
|
||
|
|
f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
|
||
|
|
g = q * f(y, x) + c * f(y + 1, x);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void diriir2d(AVFilterContext *ctx, int plane)
|
||
|
|
{
|
||
|
|
DBlurContext *s = ctx->priv;
|
||
|
|
const int width = s->planewidth[plane];
|
||
|
|
const int height = s->planeheight[plane];
|
||
|
|
|
||
|
|
filter_horizontally(ctx, width, height);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int query_formats(AVFilterContext *ctx)
|
||
|
|
{
|
||
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
||
|
|
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
|
||
|
|
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
|
||
|
|
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
|
||
|
|
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
|
||
|
|
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
|
||
|
|
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
|
||
|
|
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
|
||
|
|
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
|
||
|
|
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
|
||
|
|
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
|
||
|
|
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
|
||
|
|
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
|
||
|
|
AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
|
||
|
|
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
|
||
|
|
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
|
||
|
|
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
|
||
|
|
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
|
||
|
|
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
|
||
|
|
AV_PIX_FMT_NONE
|
||
|
|
};
|
||
|
|
|
||
|
|
return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
|
||
|
|
}
|
||
|
|
|
||
|
|
static int config_input(AVFilterLink *inlink)
|
||
|
|
{
|
||
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
|
||
|
|
DBlurContext *s = inlink->dst->priv;
|
||
|
|
|
||
|
|
s->depth = desc->comp[0].depth;
|
||
|
|
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
|
||
|
|
s->planewidth[0] = s->planewidth[3] = inlink->w;
|
||
|
|
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
|
||
|
|
s->planeheight[0] = s->planeheight[3] = inlink->h;
|
||
|
|
|
||
|
|
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
|
||
|
|
|
||
|
|
s->buffer = av_malloc_array(FFALIGN(inlink->w, 16), FFALIGN(inlink->h, 16) * sizeof(*s->buffer));
|
||
|
|
if (!s->buffer)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void set_params(DBlurContext *s, float angle, float r)
|
||
|
|
{
|
||
|
|
float mu, nu, R1, R2, w1, w2;
|
||
|
|
float a0, a1, a2, a3;
|
||
|
|
|
||
|
|
angle = angle * M_PI / 180.f;
|
||
|
|
|
||
|
|
mu = cosf(angle);
|
||
|
|
nu = sinf(angle);
|
||
|
|
R1 = (mu * r) * (mu * r);
|
||
|
|
R2 = (nu * r) * (nu * r);
|
||
|
|
s->R3 = mu * nu * r * r;
|
||
|
|
w1 = sqrtf(0.25f + R1);
|
||
|
|
w2 = sqrtf(0.25f + R2);
|
||
|
|
a0 = (w1 + 0.5f) * (w2 + 0.5f) - fabsf(s->R3);
|
||
|
|
a1 = 0.5f + w2 - a0;
|
||
|
|
a2 = 0.5f + w1 - a0;
|
||
|
|
a3 = a0 - w1 - w2;
|
||
|
|
s->b0 = 1.f / a0;
|
||
|
|
s->b1 = -a2 / a0;
|
||
|
|
s->q = -a1 / a0;
|
||
|
|
s->c = -a3 / a0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
||
|
|
{
|
||
|
|
AVFilterContext *ctx = inlink->dst;
|
||
|
|
DBlurContext *s = ctx->priv;
|
||
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
||
|
|
AVFrame *out;
|
||
|
|
int plane;
|
||
|
|
|
||
|
|
set_params(s, s->angle, s->radius);
|
||
|
|
|
||
|
|
if (av_frame_is_writable(in)) {
|
||
|
|
out = in;
|
||
|
|
} else {
|
||
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
||
|
|
if (!out) {
|
||
|
|
av_frame_free(&in);
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
}
|
||
|
|
av_frame_copy_props(out, in);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (plane = 0; plane < s->nb_planes; plane++) {
|
||
|
|
const int height = s->planeheight[plane];
|
||
|
|
const int width = s->planewidth[plane];
|
||
|
|
float *bptr = s->buffer;
|
||
|
|
const uint8_t *src = in->data[plane];
|
||
|
|
const uint16_t *src16 = (const uint16_t *)in->data[plane];
|
||
|
|
uint8_t *dst = out->data[plane];
|
||
|
|
uint16_t *dst16 = (uint16_t *)out->data[plane];
|
||
|
|
int y, x;
|
||
|
|
|
||
|
|
if (!(s->planes & (1 << plane))) {
|
||
|
|
if (out != in)
|
||
|
|
av_image_copy_plane(out->data[plane], out->linesize[plane],
|
||
|
|
in->data[plane], in->linesize[plane],
|
||
|
|
width * ((s->depth + 7) / 8), height);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (s->depth == 8) {
|
||
|
|
for (y = 0; y < height; y++) {
|
||
|
|
for (x = 0; x < width; x++) {
|
||
|
|
bptr[x] = src[x];
|
||
|
|
}
|
||
|
|
bptr += width;
|
||
|
|
src += in->linesize[plane];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
for (y = 0; y < height; y++) {
|
||
|
|
for (x = 0; x < width; x++) {
|
||
|
|
bptr[x] = src16[x];
|
||
|
|
}
|
||
|
|
bptr += width;
|
||
|
|
src16 += in->linesize[plane] / 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
diriir2d(ctx, plane);
|
||
|
|
|
||
|
|
bptr = s->buffer;
|
||
|
|
if (s->depth == 8) {
|
||
|
|
for (y = 0; y < height; y++) {
|
||
|
|
for (x = 0; x < width; x++) {
|
||
|
|
dst[x] = bptr[x];
|
||
|
|
}
|
||
|
|
bptr += width;
|
||
|
|
dst += out->linesize[plane];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
for (y = 0; y < height; y++) {
|
||
|
|
for (x = 0; x < width; x++) {
|
||
|
|
dst16[x] = bptr[x];
|
||
|
|
}
|
||
|
|
bptr += width;
|
||
|
|
dst16 += out->linesize[plane] / 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (out != in)
|
||
|
|
av_frame_free(&in);
|
||
|
|
return ff_filter_frame(outlink, out);
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
||
|
|
{
|
||
|
|
DBlurContext *s = ctx->priv;
|
||
|
|
|
||
|
|
av_freep(&s->buffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const AVFilterPad dblur_inputs[] = {
|
||
|
|
{
|
||
|
|
.name = "default",
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.config_props = config_input,
|
||
|
|
.filter_frame = filter_frame,
|
||
|
|
},
|
||
|
|
{ NULL }
|
||
|
|
};
|
||
|
|
|
||
|
|
static const AVFilterPad dblur_outputs[] = {
|
||
|
|
{
|
||
|
|
.name = "default",
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
},
|
||
|
|
{ NULL }
|
||
|
|
};
|
||
|
|
|
||
|
|
AVFilter ff_vf_dblur = {
|
||
|
|
.name = "dblur",
|
||
|
|
.description = NULL_IF_CONFIG_SMALL("Apply Directional Blur filter."),
|
||
|
|
.priv_size = sizeof(DBlurContext),
|
||
|
|
.priv_class = &dblur_class,
|
||
|
|
.uninit = uninit,
|
||
|
|
.query_formats = query_formats,
|
||
|
|
.inputs = dblur_inputs,
|
||
|
|
.outputs = dblur_outputs,
|
||
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
|
||
|
|
.process_command = ff_filter_process_command,
|
||
|
|
};
|