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;
45 #define OFFSET(x) offsetof(DBlurContext, x)
46 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
48 static const AVOption dblur_options[] = {
49 { "angle", "set angle", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl=45}, 0.0, 360, FLAGS },
50 { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_FLOAT, {.dbl=5}, 1, 8192, FLAGS },
51 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
55 AVFILTER_DEFINE_CLASS(dblur);
57 #define f(n, m) (dst[(n) * width + (m)])
59 static int filter_horizontally(AVFilterContext *ctx, int width, int height)
61 DBlurContext *s = ctx->priv;
62 const float b0 = s->b0;
63 const float b1 = s->b1;
66 float *dst = s->buffer;
70 for (int y = 1; y < height - 1; y++) {
71 g = q * f(0, 0) + c * f(0, 0);
72 for (int x = 0; x < width; x++) {
73 f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
74 g = q * f(y, x) + c * f(y - 1, x);
78 for (int y = height - 2; y >= 0; y--) {
79 g = q * f(y, width - 1) + c * f(y, width - 1);
80 for (int x = width - 1; x >= 0; x--) {
81 f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
82 g = q * f(y, x) + c * f(y + 1, x);
86 for (int y = 1; y < height - 1; y++) {
87 g = q * f(0, width - 1) + c * f(0, width - 1);
88 for (int x = width - 1; x >= 0; x--) {
89 f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
90 g = q * f(y, x) + c * f(y - 1, x);
94 for (int y = height - 2; y >= 0; y--) {
95 g = q * f(y, 0) + c * f(y, 0);
96 for (int x = 0; x < width; x++) {
97 f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
98 g = q * f(y, x) + c * f(y + 1, x);
106 static void diriir2d(AVFilterContext *ctx, int plane)
108 DBlurContext *s = ctx->priv;
109 const int width = s->planewidth[plane];
110 const int height = s->planeheight[plane];
112 filter_horizontally(ctx, width, height);
115 static int query_formats(AVFilterContext *ctx)
117 static const enum AVPixelFormat pix_fmts[] = {
118 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
119 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
120 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
121 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
122 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
123 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
124 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
125 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
126 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
127 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
128 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
129 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
130 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
131 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
132 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
133 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
134 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
135 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
139 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
142 static int config_input(AVFilterLink *inlink)
144 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
145 DBlurContext *s = inlink->dst->priv;
147 s->depth = desc->comp[0].depth;
148 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
149 s->planewidth[0] = s->planewidth[3] = inlink->w;
150 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
151 s->planeheight[0] = s->planeheight[3] = inlink->h;
153 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
155 s->buffer = av_malloc_array(FFALIGN(inlink->w, 16), FFALIGN(inlink->h, 16) * sizeof(*s->buffer));
157 return AVERROR(ENOMEM);
162 static void set_params(DBlurContext *s, float angle, float r)
164 float mu, nu, R1, R2, w1, w2;
165 float a0, a1, a2, a3;
167 angle = angle * M_PI / 180.f;
171 R1 = (mu * r) * (mu * r);
172 R2 = (nu * r) * (nu * r);
173 s->R3 = mu * nu * r * r;
174 w1 = sqrtf(0.25f + R1);
175 w2 = sqrtf(0.25f + R2);
176 a0 = (w1 + 0.5f) * (w2 + 0.5f) - fabsf(s->R3);
186 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
188 AVFilterContext *ctx = inlink->dst;
189 DBlurContext *s = ctx->priv;
190 AVFilterLink *outlink = ctx->outputs[0];
194 set_params(s, s->angle, s->radius);
196 if (av_frame_is_writable(in)) {
199 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
202 return AVERROR(ENOMEM);
204 av_frame_copy_props(out, in);
207 for (plane = 0; plane < s->nb_planes; plane++) {
208 const int height = s->planeheight[plane];
209 const int width = s->planewidth[plane];
210 float *bptr = s->buffer;
211 const uint8_t *src = in->data[plane];
212 const uint16_t *src16 = (const uint16_t *)in->data[plane];
213 uint8_t *dst = out->data[plane];
214 uint16_t *dst16 = (uint16_t *)out->data[plane];
217 if (!(s->planes & (1 << plane))) {
219 av_image_copy_plane(out->data[plane], out->linesize[plane],
220 in->data[plane], in->linesize[plane],
221 width * ((s->depth + 7) / 8), height);
226 for (y = 0; y < height; y++) {
227 for (x = 0; x < width; x++) {
231 src += in->linesize[plane];
234 for (y = 0; y < height; y++) {
235 for (x = 0; x < width; x++) {
239 src16 += in->linesize[plane] / 2;
243 diriir2d(ctx, plane);
247 for (y = 0; y < height; y++) {
248 for (x = 0; x < width; x++) {
252 dst += out->linesize[plane];
255 for (y = 0; y < height; y++) {
256 for (x = 0; x < width; x++) {
260 dst16 += out->linesize[plane] / 2;
267 return ff_filter_frame(outlink, out);
270 static av_cold void uninit(AVFilterContext *ctx)
272 DBlurContext *s = ctx->priv;
274 av_freep(&s->buffer);
277 static const AVFilterPad dblur_inputs[] = {
280 .type = AVMEDIA_TYPE_VIDEO,
281 .config_props = config_input,
282 .filter_frame = filter_frame,
287 static const AVFilterPad dblur_outputs[] = {
290 .type = AVMEDIA_TYPE_VIDEO,
295 const AVFilter ff_vf_dblur = {
297 .description = NULL_IF_CONFIG_SMALL("Apply Directional Blur filter."),
298 .priv_size = sizeof(DBlurContext),
299 .priv_class = &dblur_class,
301 .query_formats = query_formats,
302 .inputs = dblur_inputs,
303 .outputs = dblur_outputs,
304 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
305 .process_command = ff_filter_process_command,