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1 | /* | ||
2 | * Original copyright (c) 2002 Remi Guyomarch <rguyom@pobox.com> | ||
3 | * Port copyright (c) 2010 Daniel G. Taylor <dan@programmer-art.org> | ||
4 | * Relicensed to the LGPL with permission from Remi Guyomarch. | ||
5 | * | ||
6 | * This file is part of FFmpeg. | ||
7 | * | ||
8 | * FFmpeg is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU Lesser General Public | ||
10 | * License as published by the Free Software Foundation; either | ||
11 | * version 2.1 of the License, or (at your option) any later version. | ||
12 | * | ||
13 | * FFmpeg is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
16 | * Lesser General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU Lesser General Public | ||
19 | * License along with FFmpeg; if not, write to the Free Software | ||
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
21 | */ | ||
22 | |||
23 | /** | ||
24 | * @file | ||
25 | * blur / sharpen filter, ported to FFmpeg from MPlayer | ||
26 | * libmpcodecs/unsharp.c. | ||
27 | * | ||
28 | * This code is based on: | ||
29 | * | ||
30 | * An Efficient algorithm for Gaussian blur using finite-state machines | ||
31 | * Frederick M. Waltz and John W. V. Miller | ||
32 | * | ||
33 | * SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII | ||
34 | * Originally published Boston, Nov 98 | ||
35 | * | ||
36 | * http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf | ||
37 | */ | ||
38 | |||
39 | #include "avfilter.h" | ||
40 | #include "internal.h" | ||
41 | #include "video.h" | ||
42 | #include "libavutil/common.h" | ||
43 | #include "libavutil/imgutils.h" | ||
44 | #include "libavutil/mem.h" | ||
45 | #include "libavutil/opt.h" | ||
46 | #include "libavutil/pixdesc.h" | ||
47 | #include "unsharp.h" | ||
48 | |||
49 | typedef struct TheadData { | ||
50 | UnsharpFilterParam *fp; | ||
51 | uint8_t *dst; | ||
52 | const uint8_t *src; | ||
53 | int dst_stride; | ||
54 | int src_stride; | ||
55 | int width; | ||
56 | int height; | ||
57 | } ThreadData; | ||
58 | |||
59 | #define DEF_UNSHARP_SLICE_FUNC(name, nbits) \ | ||
60 | static int name##_##nbits(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \ | ||
61 | { \ | ||
62 | ThreadData *td = arg; \ | ||
63 | UnsharpFilterParam *fp = td->fp; \ | ||
64 | UnsharpContext *s = ctx->priv; \ | ||
65 | uint32_t **sc = fp->sc; \ | ||
66 | uint32_t *sr = fp->sr; \ | ||
67 | const uint##nbits##_t *src2 = NULL; \ | ||
68 | const int amount = fp->amount; \ | ||
69 | const int steps_x = fp->steps_x; \ | ||
70 | const int steps_y = fp->steps_y; \ | ||
71 | const int scalebits = fp->scalebits; \ | ||
72 | const int32_t halfscale = fp->halfscale; \ | ||
73 | \ | ||
74 | uint##nbits##_t *dst = (uint##nbits##_t*)td->dst; \ | ||
75 | const uint##nbits##_t *src = (const uint##nbits##_t *)td->src; \ | ||
76 | int dst_stride = td->dst_stride; \ | ||
77 | int src_stride = td->src_stride; \ | ||
78 | const int width = td->width; \ | ||
79 | const int height = td->height; \ | ||
80 | const int sc_offset = jobnr * 2 * steps_y; \ | ||
81 | const int sr_offset = jobnr * (MAX_MATRIX_SIZE - 1); \ | ||
82 | const int slice_start = (height * jobnr) / nb_jobs; \ | ||
83 | const int slice_end = (height * (jobnr+1)) / nb_jobs; \ | ||
84 | \ | ||
85 | int32_t res; \ | ||
86 | int x, y, z; \ | ||
87 | uint32_t tmp1, tmp2; \ | ||
88 | \ | ||
89 | if (!amount) { \ | ||
90 | av_image_copy_plane(td->dst + slice_start * dst_stride, dst_stride, \ | ||
91 | td->src + slice_start * src_stride, src_stride, \ | ||
92 | width * s->bps, slice_end - slice_start); \ | ||
93 | return 0; \ | ||
94 | } \ | ||
95 | \ | ||
96 | for (y = 0; y < 2 * steps_y; y++) \ | ||
97 | memset(sc[sc_offset + y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x)); \ | ||
98 | \ | ||
99 | dst_stride = dst_stride / s->bps; \ | ||
100 | src_stride = src_stride / s->bps; \ | ||
101 | /* if this is not the first tile, we start from (slice_start - steps_y) */ \ | ||
102 | /* so we can get smooth result at slice boundary */ \ | ||
103 | if (slice_start > steps_y) { \ | ||
104 | src += (slice_start - steps_y) * src_stride; \ | ||
105 | dst += (slice_start - steps_y) * dst_stride; \ | ||
106 | } \ | ||
107 | \ | ||
108 | for (y = -steps_y + slice_start; y < steps_y + slice_end; y++) { \ | ||
109 | if (y < height) \ | ||
110 | src2 = src; \ | ||
111 | \ | ||
112 | memset(sr + sr_offset, 0, sizeof(sr[0]) * (2 * steps_x - 1)); \ | ||
113 | for (x = -steps_x; x < width + steps_x; x++) { \ | ||
114 | tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x]; \ | ||
115 | for (z = 0; z < steps_x * 2; z += 2) { \ | ||
116 | tmp2 = sr[sr_offset + z + 0] + tmp1; sr[sr_offset + z + 0] = tmp1; \ | ||
117 | tmp1 = sr[sr_offset + z + 1] + tmp2; sr[sr_offset + z + 1] = tmp2; \ | ||
118 | } \ | ||
119 | for (z = 0; z < steps_y * 2; z += 2) { \ | ||
120 | tmp2 = sc[sc_offset + z + 0][x + steps_x] + tmp1; \ | ||
121 | sc[sc_offset + z + 0][x + steps_x] = tmp1; \ | ||
122 | tmp1 = sc[sc_offset + z + 1][x + steps_x] + tmp2; \ | ||
123 | sc[sc_offset + z + 1][x + steps_x] = tmp2; \ | ||
124 | } \ | ||
125 | if (x >= steps_x && y >= (steps_y + slice_start)) { \ | ||
126 | const uint##nbits##_t *srx = src - steps_y * src_stride + x - steps_x; \ | ||
127 | uint##nbits##_t *dsx = dst - steps_y * dst_stride + x - steps_x; \ | ||
128 | \ | ||
129 | res = (int32_t)*srx + ((((int32_t) * srx - \ | ||
130 | (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> (8+nbits)); \ | ||
131 | *dsx = av_clip_uint##nbits(res); \ | ||
132 | } \ | ||
133 | } \ | ||
134 | if (y >= 0) { \ | ||
135 | dst += dst_stride; \ | ||
136 | src += src_stride; \ | ||
137 | } \ | ||
138 | } \ | ||
139 | return 0; \ | ||
140 | } | ||
141 |
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39686940 | DEF_UNSHARP_SLICE_FUNC(unsharp_slice, 16) |
142 |
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123193350 | DEF_UNSHARP_SLICE_FUNC(unsharp_slice, 8) |
143 | |||
144 | 70 | static int apply_unsharp_c(AVFilterContext *ctx, AVFrame *in, AVFrame *out) | |
145 | { | ||
146 | 70 | AVFilterLink *inlink = ctx->inputs[0]; | |
147 | 70 | UnsharpContext *s = ctx->priv; | |
148 | int i, plane_w[4], plane_h[4]; | ||
149 | UnsharpFilterParam *fp[4]; | ||
150 | ThreadData td; | ||
151 | |||
152 | 70 | plane_w[0] = plane_w[3] = inlink->w; | |
153 | 70 | plane_w[1] = plane_w[2] = AV_CEIL_RSHIFT(inlink->w, s->hsub); | |
154 | 70 | plane_h[0] = plane_h[3] = inlink->h; | |
155 | 70 | plane_h[1] = plane_h[2] = AV_CEIL_RSHIFT(inlink->h, s->vsub); | |
156 | 70 | fp[0] = &s->luma; | |
157 | 70 | fp[1] = fp[2] = &s->chroma; | |
158 | 70 | fp[3] = &s->alpha; | |
159 |
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280 | for (i = 0; i < s->nb_planes; i++) { |
160 | 210 | td.fp = fp[i]; | |
161 | 210 | td.dst = out->data[i]; | |
162 | 210 | td.src = in->data[i]; | |
163 | 210 | td.width = plane_w[i]; | |
164 | 210 | td.height = plane_h[i]; | |
165 | 210 | td.dst_stride = out->linesize[i]; | |
166 | 210 | td.src_stride = in->linesize[i]; | |
167 | 210 | ff_filter_execute(ctx, s->unsharp_slice, &td, NULL, | |
168 | 210 | FFMIN(plane_h[i], s->nb_threads)); | |
169 | } | ||
170 | 70 | return 0; | |
171 | } | ||
172 | |||
173 | #define MAX_SCALEBITS 25 | ||
174 | |||
175 | 12 | static int set_filter_param(AVFilterContext *ctx, const char *name, const char *short_name, | |
176 | UnsharpFilterParam *fp, int msize_x, int msize_y, float amount) | ||
177 | { | ||
178 | 12 | fp->msize_x = msize_x; | |
179 | 12 | fp->msize_y = msize_y; | |
180 | 12 | fp->amount = amount * 65536.0; | |
181 | |||
182 | 12 | fp->steps_x = msize_x / 2; | |
183 | 12 | fp->steps_y = msize_y / 2; | |
184 | 12 | fp->scalebits = (fp->steps_x + fp->steps_y) * 2; | |
185 | 12 | fp->halfscale = 1 << (fp->scalebits - 1); | |
186 | |||
187 |
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12 | if (fp->scalebits > MAX_SCALEBITS) { |
188 | ✗ | av_log(ctx, AV_LOG_ERROR, "%s matrix size (%sx/2+%sy/2)*2=%d greater than maximum value %d\n", | |
189 | name, short_name, short_name, fp->scalebits, MAX_SCALEBITS); | ||
190 | ✗ | return AVERROR(EINVAL); | |
191 | } | ||
192 | |||
193 | 12 | return 0; | |
194 | } | ||
195 | |||
196 | 4 | static av_cold int init(AVFilterContext *ctx) | |
197 | { | ||
198 | 4 | UnsharpContext *s = ctx->priv; | |
199 | int ret; | ||
200 | |||
201 | #define SET_FILTER_PARAM(name_, short_) \ | ||
202 | ret = set_filter_param(ctx, #name_, #short_, &s->name_, \ | ||
203 | s->short_##msize_x, s->short_##msize_y, s->short_##amount); \ | ||
204 | if (ret < 0) \ | ||
205 | return ret; \ | ||
206 | |||
207 |
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4 | SET_FILTER_PARAM(luma, l); |
208 |
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4 | SET_FILTER_PARAM(chroma, c); |
209 |
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4 | SET_FILTER_PARAM(alpha, a); |
210 | |||
211 | 4 | s->apply_unsharp = apply_unsharp_c; | |
212 | 4 | return 0; | |
213 | } | ||
214 | |||
215 | static const enum AVPixelFormat pix_fmts[] = { | ||
216 | AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, | ||
217 | AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16, | ||
218 | AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16, | ||
219 | AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16, | ||
220 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P, | ||
221 | AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, | ||
222 | AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, | ||
223 | AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10, | ||
224 | AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, | ||
225 | AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, | ||
226 | AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE | ||
227 | }; | ||
228 | |||
229 | 4 | static int init_filter_param(AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width) | |
230 | { | ||
231 | int z; | ||
232 | 4 | UnsharpContext *s = ctx->priv; | |
233 |
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4 | const char *effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen"; |
234 | |||
235 |
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4 | if (!(fp->msize_x & fp->msize_y & 1)) { |
236 | ✗ | av_log(ctx, AV_LOG_ERROR, | |
237 | "Invalid even size for %s matrix size %dx%d\n", | ||
238 | effect_type, fp->msize_x, fp->msize_y); | ||
239 | ✗ | return AVERROR(EINVAL); | |
240 | } | ||
241 | |||
242 | 4 | av_log(ctx, AV_LOG_VERBOSE, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n", | |
243 | 4 | effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0); | |
244 | |||
245 | 4 | fp->sr = av_malloc_array((MAX_MATRIX_SIZE - 1) * s->nb_threads, sizeof(uint32_t)); | |
246 | 4 | fp->sc = av_calloc(fp->steps_y * s->nb_threads, 2 * sizeof(*fp->sc)); | |
247 |
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4 | if (!fp->sr || !fp->sc) |
248 | ✗ | return AVERROR(ENOMEM); | |
249 | |||
250 |
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364 | for (z = 0; z < 2 * fp->steps_y * s->nb_threads; z++) |
251 |
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360 | if (!(fp->sc[z] = av_malloc_array(width + 2 * fp->steps_x, |
252 | sizeof(*(fp->sc[z]))))) | ||
253 | ✗ | return AVERROR(ENOMEM); | |
254 | |||
255 | 4 | return 0; | |
256 | } | ||
257 | |||
258 | 2 | static int config_input(AVFilterLink *inlink) | |
259 | { | ||
260 | 2 | UnsharpContext *s = inlink->dst->priv; | |
261 | 2 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); | |
262 | int ret; | ||
263 | |||
264 | 2 | s->nb_planes = desc->nb_components; | |
265 | 2 | s->hsub = desc->log2_chroma_w; | |
266 | 2 | s->vsub = desc->log2_chroma_h; | |
267 | 2 | s->bitdepth = desc->comp[0].depth; | |
268 |
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2 | s->bps = s->bitdepth > 8 ? 2 : 1; |
269 |
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2 | s->unsharp_slice = s->bitdepth > 8 ? unsharp_slice_16 : unsharp_slice_8; |
270 | |||
271 | // ensure (height / nb_threads) > 4 * steps_y, | ||
272 | // so that we don't have too much overlap between two threads | ||
273 |
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2 | s->nb_threads = FFMIN(ff_filter_get_nb_threads(inlink->dst), |
274 | inlink->h / (4 * s->luma.steps_y)); | ||
275 | |||
276 | 2 | ret = init_filter_param(inlink->dst, &s->luma, "luma", inlink->w); | |
277 |
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2 | if (ret < 0) |
278 | ✗ | return ret; | |
279 | 2 | ret = init_filter_param(inlink->dst, &s->chroma, "chroma", AV_CEIL_RSHIFT(inlink->w, s->hsub)); | |
280 |
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2 | if (ret < 0) |
281 | ✗ | return ret; | |
282 | |||
283 | 2 | return 0; | |
284 | } | ||
285 | |||
286 | 8 | static void free_filter_param(UnsharpFilterParam *fp, int nb_threads) | |
287 | { | ||
288 | int z; | ||
289 | |||
290 |
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8 | if (fp->sc) { |
291 |
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364 | for (z = 0; z < 2 * fp->steps_y * nb_threads; z++) |
292 | 360 | av_freep(&fp->sc[z]); | |
293 | 4 | av_freep(&fp->sc); | |
294 | } | ||
295 | 8 | av_freep(&fp->sr); | |
296 | 8 | } | |
297 | |||
298 | 4 | static av_cold void uninit(AVFilterContext *ctx) | |
299 | { | ||
300 | 4 | UnsharpContext *s = ctx->priv; | |
301 | |||
302 | 4 | free_filter_param(&s->luma, s->nb_threads); | |
303 | 4 | free_filter_param(&s->chroma, s->nb_threads); | |
304 | 4 | } | |
305 | |||
306 | 70 | static int filter_frame(AVFilterLink *link, AVFrame *in) | |
307 | { | ||
308 | 70 | UnsharpContext *s = link->dst->priv; | |
309 | 70 | AVFilterLink *outlink = link->dst->outputs[0]; | |
310 | AVFrame *out; | ||
311 | 70 | int ret = 0; | |
312 | |||
313 | 70 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); | |
314 |
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70 | if (!out) { |
315 | ✗ | av_frame_free(&in); | |
316 | ✗ | return AVERROR(ENOMEM); | |
317 | } | ||
318 | 70 | av_frame_copy_props(out, in); | |
319 | |||
320 | 70 | ret = s->apply_unsharp(link->dst, in, out); | |
321 | |||
322 | 70 | av_frame_free(&in); | |
323 | |||
324 |
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70 | if (ret < 0) { |
325 | ✗ | av_frame_free(&out); | |
326 | ✗ | return ret; | |
327 | } | ||
328 | 70 | return ff_filter_frame(outlink, out); | |
329 | } | ||
330 | |||
331 | #define OFFSET(x) offsetof(UnsharpContext, x) | ||
332 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM | ||
333 | #define MIN_SIZE 3 | ||
334 | #define MAX_SIZE 23 | ||
335 | static const AVOption unsharp_options[] = { | ||
336 | { "luma_msize_x", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
337 | { "lx", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
338 | { "luma_msize_y", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
339 | { "ly", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
340 | { "luma_amount", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, | ||
341 | { "la", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, | ||
342 | { "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
343 | { "cx", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
344 | { "chroma_msize_y", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
345 | { "cy", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
346 | { "chroma_amount", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, | ||
347 | { "ca", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, | ||
348 | { "alpha_msize_x", "set alpha matrix horizontal size", OFFSET(amsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
349 | { "ax", "set alpha matrix horizontal size", OFFSET(amsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
350 | { "alpha_msize_y", "set alpha matrix vertical size", OFFSET(amsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
351 | { "ay", "set alpha matrix vertical size", OFFSET(amsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, | ||
352 | { "alpha_amount", "set alpha effect strength", OFFSET(aamount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, | ||
353 | { "aa", "set alpha effect strength", OFFSET(aamount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, | ||
354 | { NULL } | ||
355 | }; | ||
356 | |||
357 | AVFILTER_DEFINE_CLASS(unsharp); | ||
358 | |||
359 | static const AVFilterPad avfilter_vf_unsharp_inputs[] = { | ||
360 | { | ||
361 | .name = "default", | ||
362 | .type = AVMEDIA_TYPE_VIDEO, | ||
363 | .filter_frame = filter_frame, | ||
364 | .config_props = config_input, | ||
365 | }, | ||
366 | }; | ||
367 | |||
368 | const AVFilter ff_vf_unsharp = { | ||
369 | .name = "unsharp", | ||
370 | .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."), | ||
371 | .priv_size = sizeof(UnsharpContext), | ||
372 | .priv_class = &unsharp_class, | ||
373 | .init = init, | ||
374 | .uninit = uninit, | ||
375 | FILTER_INPUTS(avfilter_vf_unsharp_inputs), | ||
376 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
377 | FILTER_PIXFMTS_ARRAY(pix_fmts), | ||
378 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, | ||
379 | }; | ||
380 |