FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_unsharp.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
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Branches: 76 92 82.6%

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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 "formats.h"
41 #include "internal.h"
42 #include "video.h"
43 #include "libavutil/common.h"
44 #include "libavutil/imgutils.h"
45 #include "libavutil/mem.h"
46 #include "libavutil/opt.h"
47 #include "libavutil/pixdesc.h"
48 #include "unsharp.h"
49
50 typedef struct TheadData {
51 UnsharpFilterParam *fp;
52 uint8_t *dst;
53 const uint8_t *src;
54 int dst_stride;
55 int src_stride;
56 int width;
57 int height;
58 } ThreadData;
59
60 #define DEF_UNSHARP_SLICE_FUNC(name, nbits) \
61 static int name##_##nbits(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
62 { \
63 ThreadData *td = arg; \
64 UnsharpFilterParam *fp = td->fp; \
65 UnsharpContext *s = ctx->priv; \
66 uint32_t **sc = fp->sc; \
67 uint32_t *sr = fp->sr; \
68 const uint##nbits##_t *src2 = NULL; \
69 const int amount = fp->amount; \
70 const int steps_x = fp->steps_x; \
71 const int steps_y = fp->steps_y; \
72 const int scalebits = fp->scalebits; \
73 const int32_t halfscale = fp->halfscale; \
74 \
75 uint##nbits##_t *dst = (uint##nbits##_t*)td->dst; \
76 const uint##nbits##_t *src = (const uint##nbits##_t *)td->src; \
77 int dst_stride = td->dst_stride; \
78 int src_stride = td->src_stride; \
79 const int width = td->width; \
80 const int height = td->height; \
81 const int sc_offset = jobnr * 2 * steps_y; \
82 const int sr_offset = jobnr * (MAX_MATRIX_SIZE - 1); \
83 const int slice_start = (height * jobnr) / nb_jobs; \
84 const int slice_end = (height * (jobnr+1)) / nb_jobs; \
85 \
86 int32_t res; \
87 int x, y, z; \
88 uint32_t tmp1, tmp2; \
89 \
90 if (!amount) { \
91 av_image_copy_plane(td->dst + slice_start * dst_stride, dst_stride, \
92 td->src + slice_start * src_stride, src_stride, \
93 width * s->bps, slice_end - slice_start); \
94 return 0; \
95 } \
96 \
97 for (y = 0; y < 2 * steps_y; y++) \
98 memset(sc[sc_offset + y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x)); \
99 \
100 dst_stride = dst_stride / s->bps; \
101 src_stride = src_stride / s->bps; \
102 /* if this is not the first tile, we start from (slice_start - steps_y) */ \
103 /* so we can get smooth result at slice boundary */ \
104 if (slice_start > steps_y) { \
105 src += (slice_start - steps_y) * src_stride; \
106 dst += (slice_start - steps_y) * dst_stride; \
107 } \
108 \
109 for (y = -steps_y + slice_start; y < steps_y + slice_end; y++) { \
110 if (y < height) \
111 src2 = src; \
112 \
113 memset(sr + sr_offset, 0, sizeof(sr[0]) * (2 * steps_x - 1)); \
114 for (x = -steps_x; x < width + steps_x; x++) { \
115 tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x]; \
116 for (z = 0; z < steps_x * 2; z += 2) { \
117 tmp2 = sr[sr_offset + z + 0] + tmp1; sr[sr_offset + z + 0] = tmp1; \
118 tmp1 = sr[sr_offset + z + 1] + tmp2; sr[sr_offset + z + 1] = tmp2; \
119 } \
120 for (z = 0; z < steps_y * 2; z += 2) { \
121 tmp2 = sc[sc_offset + z + 0][x + steps_x] + tmp1; \
122 sc[sc_offset + z + 0][x + steps_x] = tmp1; \
123 tmp1 = sc[sc_offset + z + 1][x + steps_x] + tmp2; \
124 sc[sc_offset + z + 1][x + steps_x] = tmp2; \
125 } \
126 if (x >= steps_x && y >= (steps_y + slice_start)) { \
127 const uint##nbits##_t *srx = src - steps_y * src_stride + x - steps_x; \
128 uint##nbits##_t *dsx = dst - steps_y * dst_stride + x - steps_x; \
129 \
130 res = (int32_t)*srx + ((((int32_t) * srx - \
131 (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> (8+nbits)); \
132 *dsx = av_clip_uint##nbits(res); \
133 } \
134 } \
135 if (y >= 0) { \
136 dst += dst_stride; \
137 src += src_stride; \
138 } \
139 } \
140 return 0; \
141 }
142
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39686940 DEF_UNSHARP_SLICE_FUNC(unsharp_slice, 16)
143
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123193350 DEF_UNSHARP_SLICE_FUNC(unsharp_slice, 8)
144
145 70 static int apply_unsharp_c(AVFilterContext *ctx, AVFrame *in, AVFrame *out)
146 {
147 70 AVFilterLink *inlink = ctx->inputs[0];
148 70 UnsharpContext *s = ctx->priv;
149 int i, plane_w[4], plane_h[4];
150 UnsharpFilterParam *fp[4];
151 ThreadData td;
152
153 70 plane_w[0] = plane_w[3] = inlink->w;
154 70 plane_w[1] = plane_w[2] = AV_CEIL_RSHIFT(inlink->w, s->hsub);
155 70 plane_h[0] = plane_h[3] = inlink->h;
156 70 plane_h[1] = plane_h[2] = AV_CEIL_RSHIFT(inlink->h, s->vsub);
157 70 fp[0] = &s->luma;
158 70 fp[1] = fp[2] = &s->chroma;
159 70 fp[3] = &s->alpha;
160
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280 for (i = 0; i < s->nb_planes; i++) {
161 210 td.fp = fp[i];
162 210 td.dst = out->data[i];
163 210 td.src = in->data[i];
164 210 td.width = plane_w[i];
165 210 td.height = plane_h[i];
166 210 td.dst_stride = out->linesize[i];
167 210 td.src_stride = in->linesize[i];
168 210 ff_filter_execute(ctx, s->unsharp_slice, &td, NULL,
169 210 FFMIN(plane_h[i], s->nb_threads));
170 }
171 70 return 0;
172 }
173
174 9 static void set_filter_param(UnsharpFilterParam *fp, int msize_x, int msize_y, float amount)
175 {
176 9 fp->msize_x = msize_x;
177 9 fp->msize_y = msize_y;
178 9 fp->amount = amount * 65536.0;
179
180 9 fp->steps_x = msize_x / 2;
181 9 fp->steps_y = msize_y / 2;
182 9 fp->scalebits = (fp->steps_x + fp->steps_y) * 2;
183 9 fp->halfscale = 1 << (fp->scalebits - 1);
184 9 }
185
186 3 static av_cold int init(AVFilterContext *ctx)
187 {
188 3 UnsharpContext *s = ctx->priv;
189
190 3 set_filter_param(&s->luma, s->lmsize_x, s->lmsize_y, s->lamount);
191 3 set_filter_param(&s->chroma, s->cmsize_x, s->cmsize_y, s->camount);
192 3 set_filter_param(&s->alpha, s->amsize_x, s->amsize_y, s->aamount);
193
194
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3 if (s->luma.scalebits >= 26 || s->chroma.scalebits >= 26 || s->alpha.scalebits >= 26) {
195 av_log(ctx, AV_LOG_ERROR, "luma or chroma or alpha matrix size too big\n");
196 return AVERROR(EINVAL);
197 }
198 3 s->apply_unsharp = apply_unsharp_c;
199 3 return 0;
200 }
201
202 static const enum AVPixelFormat pix_fmts[] = {
203 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
204 AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
205 AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
206 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
207 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P,
208 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
209 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
210 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
211 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
212 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
213 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE
214 };
215
216 4 static int init_filter_param(AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width)
217 {
218 int z;
219 4 UnsharpContext *s = ctx->priv;
220
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4 const char *effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen";
221
222
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4 if (!(fp->msize_x & fp->msize_y & 1)) {
223 av_log(ctx, AV_LOG_ERROR,
224 "Invalid even size for %s matrix size %dx%d\n",
225 effect_type, fp->msize_x, fp->msize_y);
226 return AVERROR(EINVAL);
227 }
228
229 4 av_log(ctx, AV_LOG_VERBOSE, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n",
230 4 effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0);
231
232 4 fp->sr = av_malloc_array((MAX_MATRIX_SIZE - 1) * s->nb_threads, sizeof(uint32_t));
233 4 fp->sc = av_calloc(fp->steps_y * s->nb_threads, 2 * sizeof(*fp->sc));
234
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4 if (!fp->sr || !fp->sc)
235 return AVERROR(ENOMEM);
236
237
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364 for (z = 0; z < 2 * fp->steps_y * s->nb_threads; z++)
238
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360 if (!(fp->sc[z] = av_malloc_array(width + 2 * fp->steps_x,
239 sizeof(*(fp->sc[z])))))
240 return AVERROR(ENOMEM);
241
242 4 return 0;
243 }
244
245 2 static int config_input(AVFilterLink *inlink)
246 {
247 2 UnsharpContext *s = inlink->dst->priv;
248 2 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
249 int ret;
250
251 2 s->nb_planes = desc->nb_components;
252 2 s->hsub = desc->log2_chroma_w;
253 2 s->vsub = desc->log2_chroma_h;
254 2 s->bitdepth = desc->comp[0].depth;
255
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2 s->bps = s->bitdepth > 8 ? 2 : 1;
256
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2 s->unsharp_slice = s->bitdepth > 8 ? unsharp_slice_16 : unsharp_slice_8;
257
258 // ensure (height / nb_threads) > 4 * steps_y,
259 // so that we don't have too much overlap between two threads
260
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2 s->nb_threads = FFMIN(ff_filter_get_nb_threads(inlink->dst),
261 inlink->h / (4 * s->luma.steps_y));
262
263 2 ret = init_filter_param(inlink->dst, &s->luma, "luma", inlink->w);
264
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2 if (ret < 0)
265 return ret;
266 2 ret = init_filter_param(inlink->dst, &s->chroma, "chroma", AV_CEIL_RSHIFT(inlink->w, s->hsub));
267
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2 if (ret < 0)
268 return ret;
269
270 2 return 0;
271 }
272
273 6 static void free_filter_param(UnsharpFilterParam *fp, int nb_threads)
274 {
275 int z;
276
277
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6 if (fp->sc) {
278
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364 for (z = 0; z < 2 * fp->steps_y * nb_threads; z++)
279 360 av_freep(&fp->sc[z]);
280 4 av_freep(&fp->sc);
281 }
282 6 av_freep(&fp->sr);
283 6 }
284
285 3 static av_cold void uninit(AVFilterContext *ctx)
286 {
287 3 UnsharpContext *s = ctx->priv;
288
289 3 free_filter_param(&s->luma, s->nb_threads);
290 3 free_filter_param(&s->chroma, s->nb_threads);
291 3 }
292
293 70 static int filter_frame(AVFilterLink *link, AVFrame *in)
294 {
295 70 UnsharpContext *s = link->dst->priv;
296 70 AVFilterLink *outlink = link->dst->outputs[0];
297 AVFrame *out;
298 70 int ret = 0;
299
300 70 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
301
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70 if (!out) {
302 av_frame_free(&in);
303 return AVERROR(ENOMEM);
304 }
305 70 av_frame_copy_props(out, in);
306
307 70 ret = s->apply_unsharp(link->dst, in, out);
308
309 70 av_frame_free(&in);
310
311
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70 if (ret < 0) {
312 av_frame_free(&out);
313 return ret;
314 }
315 70 return ff_filter_frame(outlink, out);
316 }
317
318 #define OFFSET(x) offsetof(UnsharpContext, x)
319 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
320 #define MIN_SIZE 3
321 #define MAX_SIZE 23
322 static const AVOption unsharp_options[] = {
323 { "luma_msize_x", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
324 { "lx", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
325 { "luma_msize_y", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
326 { "ly", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
327 { "luma_amount", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS },
328 { "la", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS },
329 { "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
330 { "cx", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
331 { "chroma_msize_y", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
332 { "cy", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
333 { "chroma_amount", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS },
334 { "ca", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS },
335 { "alpha_msize_x", "set alpha matrix horizontal size", OFFSET(amsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
336 { "ax", "set alpha matrix horizontal size", OFFSET(amsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
337 { "alpha_msize_y", "set alpha matrix vertical size", OFFSET(amsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
338 { "ay", "set alpha matrix vertical size", OFFSET(amsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
339 { "alpha_amount", "set alpha effect strength", OFFSET(aamount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS },
340 { "aa", "set alpha effect strength", OFFSET(aamount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS },
341 { NULL }
342 };
343
344 AVFILTER_DEFINE_CLASS(unsharp);
345
346 static const AVFilterPad avfilter_vf_unsharp_inputs[] = {
347 {
348 .name = "default",
349 .type = AVMEDIA_TYPE_VIDEO,
350 .filter_frame = filter_frame,
351 .config_props = config_input,
352 },
353 };
354
355 static const AVFilterPad avfilter_vf_unsharp_outputs[] = {
356 {
357 .name = "default",
358 .type = AVMEDIA_TYPE_VIDEO,
359 },
360 };
361
362 const AVFilter ff_vf_unsharp = {
363 .name = "unsharp",
364 .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."),
365 .priv_size = sizeof(UnsharpContext),
366 .priv_class = &unsharp_class,
367 .init = init,
368 .uninit = uninit,
369 FILTER_INPUTS(avfilter_vf_unsharp_inputs),
370 FILTER_OUTPUTS(avfilter_vf_unsharp_outputs),
371 FILTER_PIXFMTS_ARRAY(pix_fmts),
372 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
373 };
374