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path: root/libavfilter/vf_avgblur.c (plain)
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1/*
2 * Copyright (c) 2016 Paul B Mahol
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23#include "libavutil/imgutils.h"
24#include "libavutil/opt.h"
25#include "libavutil/pixdesc.h"
26#include "avfilter.h"
27#include "formats.h"
28#include "internal.h"
29#include "video.h"
30
31typedef struct AverageBlurContext {
32 const AVClass *class;
33
34 int radius;
35 int radiusV;
36 int planes;
37
38 int depth;
39 int planewidth[4];
40 int planeheight[4];
41 float *buffer;
42 int nb_planes;
43
44 int (*filter_horizontally)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
45 int (*filter_vertically)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
46} AverageBlurContext;
47
48#define OFFSET(x) offsetof(AverageBlurContext, x)
49#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
50
51static const AVOption avgblur_options[] = {
52 { "sizeX", "set horizontal size", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=1}, 1, 1024, FLAGS },
53 { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
54 { "sizeY", "set vertical size", OFFSET(radiusV), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, FLAGS },
55 { NULL }
56};
57
58AVFILTER_DEFINE_CLASS(avgblur);
59
60typedef struct ThreadData {
61 int height;
62 int width;
63 uint8_t *ptr;
64 int linesize;
65} ThreadData;
66
67#define HORIZONTAL_FILTER(name, type) \
68static int filter_horizontally_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)\
69{ \
70 AverageBlurContext *s = ctx->priv; \
71 ThreadData *td = arg; \
72 const int height = td->height; \
73 const int width = td->width; \
74 const int slice_start = (height * jobnr ) / nb_jobs; \
75 const int slice_end = (height * (jobnr+1)) / nb_jobs; \
76 const int radius = FFMIN(s->radius, width / 2); \
77 const int linesize = td->linesize / sizeof(type); \
78 float *buffer = s->buffer; \
79 const type *src; \
80 float *ptr; \
81 int y, x; \
82 \
83 /* Filter horizontally along each row */ \
84 for (y = slice_start; y < slice_end; y++) { \
85 float acc = 0; \
86 int count = 0; \
87 \
88 src = (const type *)td->ptr + linesize * y; \
89 ptr = buffer + width * y; \
90 \
91 for (x = 0; x < radius; x++) { \
92 acc += src[x]; \
93 } \
94 count += radius; \
95 \
96 for (x = 0; x <= radius; x++) { \
97 acc += src[x + radius]; \
98 count++; \
99 ptr[x] = acc / count; \
100 } \
101 \
102 for (; x < width - radius; x++) { \
103 acc += src[x + radius] - src[x - radius - 1]; \
104 ptr[x] = acc / count; \
105 } \
106 \
107 for (; x < width; x++) { \
108 acc -= src[x - radius]; \
109 count--; \
110 ptr[x] = acc / count; \
111 } \
112 } \
113 \
114 return 0; \
115}
116
117HORIZONTAL_FILTER(8, uint8_t)
118HORIZONTAL_FILTER(16, uint16_t)
119
120#define VERTICAL_FILTER(name, type) \
121static int filter_vertically_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
122{ \
123 AverageBlurContext *s = ctx->priv; \
124 ThreadData *td = arg; \
125 const int height = td->height; \
126 const int width = td->width; \
127 const int slice_start = (width * jobnr ) / nb_jobs; \
128 const int slice_end = (width * (jobnr+1)) / nb_jobs; \
129 const int radius = FFMIN(s->radiusV, height / 2); \
130 const int linesize = td->linesize / sizeof(type); \
131 type *buffer = (type *)td->ptr; \
132 const float *src; \
133 type *ptr; \
134 int i, x; \
135 \
136 /* Filter vertically along each column */ \
137 for (x = slice_start; x < slice_end; x++) { \
138 float acc = 0; \
139 int count = 0; \
140 \
141 ptr = buffer + x; \
142 src = s->buffer + x; \
143 \
144 for (i = 0; i < radius; i++) { \
145 acc += src[0]; \
146 src += width; \
147 } \
148 count += radius; \
149 \
150 src = s->buffer + x; \
151 ptr = buffer + x; \
152 for (i = 0; i <= radius; i++) { \
153 acc += src[(i + radius) * width]; \
154 count++; \
155 ptr[i * linesize] = acc / count; \
156 } \
157 \
158 for (; i < height - radius; i++) { \
159 acc += src[(i + radius) * width] - src[(i - radius - 1) * width]; \
160 ptr[i * linesize] = acc / count; \
161 } \
162 \
163 for (; i < height; i++) { \
164 acc -= src[(i - radius) * width]; \
165 count--; \
166 ptr[i * linesize] = acc / count; \
167 } \
168 } \
169 \
170 return 0; \
171}
172
173VERTICAL_FILTER(8, uint8_t)
174VERTICAL_FILTER(16, uint16_t)
175
176static int config_input(AVFilterLink *inlink)
177{
178 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
179 AverageBlurContext *s = inlink->dst->priv;
180
181 s->depth = desc->comp[0].depth;
182 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
183 s->planewidth[0] = s->planewidth[3] = inlink->w;
184 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
185 s->planeheight[0] = s->planeheight[3] = inlink->h;
186
187 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
188
189 s->buffer = av_malloc_array(inlink->w, inlink->h * sizeof(*s->buffer));
190 if (!s->buffer)
191 return AVERROR(ENOMEM);
192
193 if (s->radiusV <= 0) {
194 s->radiusV = s->radius;
195 }
196
197 if (s->depth == 8) {
198 s->filter_horizontally = filter_horizontally_8;
199 s->filter_vertically = filter_vertically_8;
200 } else {
201 s->filter_horizontally = filter_horizontally_16;
202 s->filter_vertically = filter_vertically_16;
203 }
204
205 return 0;
206}
207
208static void averageiir2d(AVFilterContext *ctx, AVFrame *in, AVFrame *out, int plane)
209{
210 AverageBlurContext *s = ctx->priv;
211 const int width = s->planewidth[plane];
212 const int height = s->planeheight[plane];
213 const int nb_threads = ff_filter_get_nb_threads(ctx);
214 ThreadData td;
215
216 td.width = width;
217 td.height = height;
218 td.ptr = in->data[plane];
219 td.linesize = in->linesize[plane];
220 ctx->internal->execute(ctx, s->filter_horizontally, &td, NULL, FFMIN(height, nb_threads));
221 td.ptr = out->data[plane];
222 td.linesize = out->linesize[plane];
223 ctx->internal->execute(ctx, s->filter_vertically, &td, NULL, FFMIN(width, nb_threads));
224}
225
226static int query_formats(AVFilterContext *ctx)
227{
228 static const enum AVPixelFormat pix_fmts[] = {
229 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
230 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
231 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
232 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
233 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
234 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
235 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
236 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
237 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
238 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
239 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
240 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
241 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
242 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
243 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
244 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
245 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
246 AV_PIX_FMT_NONE
247 };
248
249 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
250}
251
252static int filter_frame(AVFilterLink *inlink, AVFrame *in)
253{
254 AVFilterContext *ctx = inlink->dst;
255 AverageBlurContext *s = ctx->priv;
256 AVFilterLink *outlink = ctx->outputs[0];
257 AVFrame *out;
258 int plane;
259
260 if (av_frame_is_writable(in)) {
261 out = in;
262 } else {
263 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
264 if (!out) {
265 av_frame_free(&in);
266 return AVERROR(ENOMEM);
267 }
268 av_frame_copy_props(out, in);
269 }
270
271 for (plane = 0; plane < s->nb_planes; plane++) {
272 const int height = s->planeheight[plane];
273 const int width = s->planewidth[plane];
274
275 if (!(s->planes & (1 << plane))) {
276 if (out != in)
277 av_image_copy_plane(out->data[plane], out->linesize[plane],
278 in->data[plane], in->linesize[plane],
279 width * ((s->depth + 7) / 8), height);
280 continue;
281 }
282
283 averageiir2d(ctx, in, out, plane);
284 }
285
286 if (out != in)
287 av_frame_free(&in);
288 return ff_filter_frame(outlink, out);
289}
290
291static av_cold void uninit(AVFilterContext *ctx)
292{
293 AverageBlurContext *s = ctx->priv;
294
295 av_freep(&s->buffer);
296}
297
298static const AVFilterPad avgblur_inputs[] = {
299 {
300 .name = "default",
301 .type = AVMEDIA_TYPE_VIDEO,
302 .config_props = config_input,
303 .filter_frame = filter_frame,
304 },
305 { NULL }
306};
307
308static const AVFilterPad avgblur_outputs[] = {
309 {
310 .name = "default",
311 .type = AVMEDIA_TYPE_VIDEO,
312 },
313 { NULL }
314};
315
316AVFilter ff_vf_avgblur = {
317 .name = "avgblur",
318 .description = NULL_IF_CONFIG_SMALL("Apply Average Blur filter."),
319 .priv_size = sizeof(AverageBlurContext),
320 .priv_class = &avgblur_class,
321 .uninit = uninit,
322 .query_formats = query_formats,
323 .inputs = avgblur_inputs,
324 .outputs = avgblur_outputs,
325 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
326};
327
generated by cgit at 2024-05-17 02:03:46 (GMT)