2 * Copyright (c) 2020 Paul B Mahol
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/imgutils.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/pixdesc.h"
29 typedef struct DBlurContext {
36 float b0, b1, q, c, R3;
43 void (*horiz_slice)(float *buffer, int width, int height, int steps, float nu, float bscale);
46 #define OFFSET(x) offsetof(DBlurContext, x)
47 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
49 static const AVOption dblur_options[] = {
50 { "angle", "set angle", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl=45}, 0.0, 360, FLAGS },
51 { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_FLOAT, {.dbl=5}, 1, 8192, FLAGS },
52 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
56 AVFILTER_DEFINE_CLASS(dblur);
58 #define f(n, m) (dst[(n) * width + (m)])
60 static int filter_horizontally(AVFilterContext *ctx, int width, int height)
62 DBlurContext *s = ctx->priv;
63 const float b0 = s->b0;
64 const float b1 = s->b1;
67 float *dst = s->buffer;
71 for (int y = 1; y < height - 1; y++) {
72 g = q * f(0, 0) + c * f(0, 0);
73 for (int x = 0; x < width; x++) {
74 f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
75 g = q * f(y, x) + c * f(y - 1, x);
79 for (int y = height - 2; y >= 0; y--) {
80 g = q * f(y, width - 1) + c * f(y, width - 1);
81 for (int x = width - 1; x >= 0; x--) {
82 f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
83 g = q * f(y, x) + c * f(y + 1, x);
87 for (int y = 1; y < height - 1; y++) {
88 g = q * f(0, width - 1) + c * f(0, width - 1);
89 for (int x = width - 1; x >= 0; x--) {
90 f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
91 g = q * f(y, x) + c * f(y - 1, x);
95 for (int y = height - 2; y >= 0; y--) {
96 g = q * f(y, 0) + c * f(y, 0);
97 for (int x = 0; x < width; x++) {
98 f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
99 g = q * f(y, x) + c * f(y + 1, x);
107 static void diriir2d(AVFilterContext *ctx, int plane)
109 DBlurContext *s = ctx->priv;
110 const int width = s->planewidth[plane];
111 const int height = s->planeheight[plane];
113 filter_horizontally(ctx, width, height);
116 static int query_formats(AVFilterContext *ctx)
118 static const enum AVPixelFormat pix_fmts[] = {
119 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
120 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
121 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
122 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
123 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
124 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
125 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
126 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
127 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
128 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
129 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
130 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
131 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
132 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
133 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
134 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
135 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
136 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
140 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
143 static int config_input(AVFilterLink *inlink)
145 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
146 DBlurContext *s = inlink->dst->priv;
148 s->depth = desc->comp[0].depth;
149 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
150 s->planewidth[0] = s->planewidth[3] = inlink->w;
151 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
152 s->planeheight[0] = s->planeheight[3] = inlink->h;
154 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
156 s->buffer = av_malloc_array(FFALIGN(inlink->w, 16), FFALIGN(inlink->h, 16) * sizeof(*s->buffer));
158 return AVERROR(ENOMEM);
163 static void set_params(DBlurContext *s, float angle, float r)
165 float mu, nu, R1, R2, w1, w2;
166 float a0, a1, a2, a3;
168 angle = angle * M_PI / 180.f;
172 R1 = (mu * r) * (mu * r);
173 R2 = (nu * r) * (nu * r);
174 s->R3 = mu * nu * r * r;
175 w1 = sqrtf(0.25f + R1);
176 w2 = sqrtf(0.25f + R2);
177 a0 = (w1 + 0.5f) * (w2 + 0.5f) - fabsf(s->R3);
187 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
189 AVFilterContext *ctx = inlink->dst;
190 DBlurContext *s = ctx->priv;
191 AVFilterLink *outlink = ctx->outputs[0];
195 set_params(s, s->angle, s->radius);
197 if (av_frame_is_writable(in)) {
200 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
203 return AVERROR(ENOMEM);
205 av_frame_copy_props(out, in);
208 for (plane = 0; plane < s->nb_planes; plane++) {
209 const int height = s->planeheight[plane];
210 const int width = s->planewidth[plane];
211 float *bptr = s->buffer;
212 const uint8_t *src = in->data[plane];
213 const uint16_t *src16 = (const uint16_t *)in->data[plane];
214 uint8_t *dst = out->data[plane];
215 uint16_t *dst16 = (uint16_t *)out->data[plane];
218 if (!(s->planes & (1 << plane))) {
220 av_image_copy_plane(out->data[plane], out->linesize[plane],
221 in->data[plane], in->linesize[plane],
222 width * ((s->depth + 7) / 8), height);
227 for (y = 0; y < height; y++) {
228 for (x = 0; x < width; x++) {
232 src += in->linesize[plane];
235 for (y = 0; y < height; y++) {
236 for (x = 0; x < width; x++) {
240 src16 += in->linesize[plane] / 2;
244 diriir2d(ctx, plane);
248 for (y = 0; y < height; y++) {
249 for (x = 0; x < width; x++) {
253 dst += out->linesize[plane];
256 for (y = 0; y < height; y++) {
257 for (x = 0; x < width; x++) {
261 dst16 += out->linesize[plane] / 2;
268 return ff_filter_frame(outlink, out);
271 static av_cold void uninit(AVFilterContext *ctx)
273 DBlurContext *s = ctx->priv;
275 av_freep(&s->buffer);
278 static const AVFilterPad dblur_inputs[] = {
281 .type = AVMEDIA_TYPE_VIDEO,
282 .config_props = config_input,
283 .filter_frame = filter_frame,
288 static const AVFilterPad dblur_outputs[] = {
291 .type = AVMEDIA_TYPE_VIDEO,
296 AVFilter ff_vf_dblur = {
298 .description = NULL_IF_CONFIG_SMALL("Apply Directional Blur filter."),
299 .priv_size = sizeof(DBlurContext),
300 .priv_class = &dblur_class,
302 .query_formats = query_formats,
303 .inputs = dblur_inputs,
304 .outputs = dblur_outputs,
305 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
306 .process_command = ff_filter_process_command,