blob: abdf04708b9ea0abd48856d244271e1d3e123683
1 | /* |
2 | * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at> |
3 | * Copyright (c) 2013 Paul B Mahol |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | /** |
23 | * @file |
24 | * noise generator |
25 | */ |
26 | |
27 | #include "libavutil/opt.h" |
28 | #include "libavutil/imgutils.h" |
29 | #include "libavutil/lfg.h" |
30 | #include "libavutil/parseutils.h" |
31 | #include "libavutil/pixdesc.h" |
32 | #include "avfilter.h" |
33 | #include "formats.h" |
34 | #include "internal.h" |
35 | #include "vf_noise.h" |
36 | #include "video.h" |
37 | |
38 | typedef struct ThreadData { |
39 | AVFrame *in, *out; |
40 | } ThreadData; |
41 | |
42 | #define OFFSET(x) offsetof(NoiseContext, x) |
43 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
44 | |
45 | #define NOISE_PARAMS(name, x, param) \ |
46 | {#name"_seed", "set component #"#x" noise seed", OFFSET(param.seed), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS}, \ |
47 | {#name"_strength", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \ |
48 | {#name"s", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \ |
49 | {#name"_flags", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \ |
50 | {#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \ |
51 | {"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, #name"_flags"}, \ |
52 | {"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN}, 0, 0, FLAGS, #name"_flags"}, \ |
53 | {"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, #name"_flags"}, \ |
54 | {"u", "uniform noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM}, 0, 0, FLAGS, #name"_flags"}, |
55 | |
56 | static const AVOption noise_options[] = { |
57 | NOISE_PARAMS(all, 0, all) |
58 | NOISE_PARAMS(c0, 0, param[0]) |
59 | NOISE_PARAMS(c1, 1, param[1]) |
60 | NOISE_PARAMS(c2, 2, param[2]) |
61 | NOISE_PARAMS(c3, 3, param[3]) |
62 | {NULL} |
63 | }; |
64 | |
65 | AVFILTER_DEFINE_CLASS(noise); |
66 | |
67 | static const int8_t patt[4] = { -1, 0, 1, 0 }; |
68 | |
69 | #define RAND_N(range) ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0))) |
70 | static av_cold int init_noise(NoiseContext *n, int comp) |
71 | { |
72 | int8_t *noise = av_malloc(MAX_NOISE * sizeof(int8_t)); |
73 | FilterParams *fp = &n->param[comp]; |
74 | AVLFG *lfg = &n->param[comp].lfg; |
75 | int strength = fp->strength; |
76 | int flags = fp->flags; |
77 | int i, j; |
78 | |
79 | if (!noise) |
80 | return AVERROR(ENOMEM); |
81 | |
82 | av_lfg_init(&fp->lfg, fp->seed + comp*31415U); |
83 | |
84 | for (i = 0, j = 0; i < MAX_NOISE; i++, j++) { |
85 | if (flags & NOISE_UNIFORM) { |
86 | if (flags & NOISE_AVERAGED) { |
87 | if (flags & NOISE_PATTERN) { |
88 | noise[i] = (RAND_N(strength) - strength / 2) / 6 |
89 | + patt[j % 4] * strength * 0.25 / 3; |
90 | } else { |
91 | noise[i] = (RAND_N(strength) - strength / 2) / 3; |
92 | } |
93 | } else { |
94 | if (flags & NOISE_PATTERN) { |
95 | noise[i] = (RAND_N(strength) - strength / 2) / 2 |
96 | + patt[j % 4] * strength * 0.25; |
97 | } else { |
98 | noise[i] = RAND_N(strength) - strength / 2; |
99 | } |
100 | } |
101 | } else { |
102 | double x1, x2, w, y1; |
103 | do { |
104 | x1 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0; |
105 | x2 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0; |
106 | w = x1 * x1 + x2 * x2; |
107 | } while (w >= 1.0); |
108 | |
109 | w = sqrt((-2.0 * log(w)) / w); |
110 | y1 = x1 * w; |
111 | y1 *= strength / sqrt(3.0); |
112 | if (flags & NOISE_PATTERN) { |
113 | y1 /= 2; |
114 | y1 += patt[j % 4] * strength * 0.35; |
115 | } |
116 | y1 = av_clipf(y1, -128, 127); |
117 | if (flags & NOISE_AVERAGED) |
118 | y1 /= 3.0; |
119 | noise[i] = (int)y1; |
120 | } |
121 | if (RAND_N(6) == 0) |
122 | j--; |
123 | } |
124 | |
125 | for (i = 0; i < MAX_RES; i++) |
126 | for (j = 0; j < 3; j++) |
127 | fp->prev_shift[i][j] = noise + (av_lfg_get(lfg) & (MAX_SHIFT - 1)); |
128 | |
129 | fp->noise = noise; |
130 | return 0; |
131 | } |
132 | |
133 | static int query_formats(AVFilterContext *ctx) |
134 | { |
135 | AVFilterFormats *formats = NULL; |
136 | int fmt, ret; |
137 | |
138 | for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { |
139 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); |
140 | if (desc->flags & AV_PIX_FMT_FLAG_PLANAR && !(desc->comp[0].depth & 7) |
141 | && (ret = ff_add_format(&formats, fmt)) < 0) |
142 | return ret; |
143 | } |
144 | |
145 | return ff_set_common_formats(ctx, formats); |
146 | } |
147 | |
148 | static int config_input(AVFilterLink *inlink) |
149 | { |
150 | NoiseContext *n = inlink->dst->priv; |
151 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
152 | int ret; |
153 | |
154 | n->nb_planes = av_pix_fmt_count_planes(inlink->format); |
155 | |
156 | if ((ret = av_image_fill_linesizes(n->bytewidth, inlink->format, inlink->w)) < 0) |
157 | return ret; |
158 | |
159 | n->height[1] = n->height[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
160 | n->height[0] = n->height[3] = inlink->h; |
161 | |
162 | return 0; |
163 | } |
164 | |
165 | void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, |
166 | int len, int shift) |
167 | { |
168 | int i; |
169 | |
170 | noise += shift; |
171 | for (i = 0; i < len; i++) { |
172 | int v = src[i] + noise[i]; |
173 | |
174 | dst[i] = av_clip_uint8(v); |
175 | } |
176 | } |
177 | |
178 | void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, |
179 | int len, const int8_t * const *shift) |
180 | { |
181 | int i; |
182 | const int8_t *src2 = (const int8_t*)src; |
183 | |
184 | for (i = 0; i < len; i++) { |
185 | const int n = shift[0][i] + shift[1][i] + shift[2][i]; |
186 | dst[i] = src2[i] + ((n * src2[i]) >> 7); |
187 | } |
188 | } |
189 | |
190 | static void noise(uint8_t *dst, const uint8_t *src, |
191 | int dst_linesize, int src_linesize, |
192 | int width, int start, int end, NoiseContext *n, int comp) |
193 | { |
194 | FilterParams *p = &n->param[comp]; |
195 | int8_t *noise = p->noise; |
196 | const int flags = p->flags; |
197 | int y; |
198 | |
199 | if (!noise) { |
200 | if (dst != src) |
201 | av_image_copy_plane(dst, dst_linesize, src, src_linesize, width, end - start); |
202 | return; |
203 | } |
204 | |
205 | for (y = start; y < end; y++) { |
206 | const int ix = y & (MAX_RES - 1); |
207 | int x; |
208 | for (x=0; x < width; x+= MAX_RES) { |
209 | int w = FFMIN(width - x, MAX_RES); |
210 | int shift = p->rand_shift[ix]; |
211 | |
212 | if (flags & NOISE_AVERAGED) { |
213 | n->line_noise_avg(dst + x, src + x, w, (const int8_t**)p->prev_shift[ix]); |
214 | p->prev_shift[ix][shift & 3] = noise + shift; |
215 | } else { |
216 | n->line_noise(dst + x, src + x, noise, w, shift); |
217 | } |
218 | } |
219 | dst += dst_linesize; |
220 | src += src_linesize; |
221 | } |
222 | } |
223 | |
224 | static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
225 | { |
226 | NoiseContext *s = ctx->priv; |
227 | ThreadData *td = arg; |
228 | int plane; |
229 | |
230 | for (plane = 0; plane < s->nb_planes; plane++) { |
231 | const int height = s->height[plane]; |
232 | const int start = (height * jobnr ) / nb_jobs; |
233 | const int end = (height * (jobnr+1)) / nb_jobs; |
234 | noise(td->out->data[plane] + start * td->out->linesize[plane], |
235 | td->in->data[plane] + start * td->in->linesize[plane], |
236 | td->out->linesize[plane], td->in->linesize[plane], |
237 | s->bytewidth[plane], start, end, s, plane); |
238 | } |
239 | return 0; |
240 | } |
241 | |
242 | static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref) |
243 | { |
244 | AVFilterContext *ctx = inlink->dst; |
245 | AVFilterLink *outlink = ctx->outputs[0]; |
246 | NoiseContext *n = ctx->priv; |
247 | ThreadData td; |
248 | AVFrame *out; |
249 | int comp, i; |
250 | |
251 | if (av_frame_is_writable(inpicref)) { |
252 | out = inpicref; |
253 | } else { |
254 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
255 | if (!out) { |
256 | av_frame_free(&inpicref); |
257 | return AVERROR(ENOMEM); |
258 | } |
259 | av_frame_copy_props(out, inpicref); |
260 | } |
261 | |
262 | for (comp = 0; comp < 4; comp++) { |
263 | FilterParams *fp = &n->param[comp]; |
264 | |
265 | if ((!fp->rand_shift_init || (fp->flags & NOISE_TEMPORAL)) && fp->strength) { |
266 | |
267 | for (i = 0; i < MAX_RES; i++) { |
268 | fp->rand_shift[i] = av_lfg_get(&fp->lfg) & (MAX_SHIFT - 1); |
269 | } |
270 | fp->rand_shift_init = 1; |
271 | } |
272 | } |
273 | |
274 | td.in = inpicref; td.out = out; |
275 | ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(n->height[0], ff_filter_get_nb_threads(ctx))); |
276 | emms_c(); |
277 | |
278 | if (inpicref != out) |
279 | av_frame_free(&inpicref); |
280 | return ff_filter_frame(outlink, out); |
281 | } |
282 | |
283 | static av_cold int init(AVFilterContext *ctx) |
284 | { |
285 | NoiseContext *n = ctx->priv; |
286 | int ret, i; |
287 | |
288 | for (i = 0; i < 4; i++) { |
289 | if (n->all.seed >= 0) |
290 | n->param[i].seed = n->all.seed; |
291 | else |
292 | n->param[i].seed = 123457; |
293 | if (n->all.strength) |
294 | n->param[i].strength = n->all.strength; |
295 | if (n->all.flags) |
296 | n->param[i].flags = n->all.flags; |
297 | } |
298 | |
299 | for (i = 0; i < 4; i++) { |
300 | if (n->param[i].strength && ((ret = init_noise(n, i)) < 0)) |
301 | return ret; |
302 | } |
303 | |
304 | n->line_noise = ff_line_noise_c; |
305 | n->line_noise_avg = ff_line_noise_avg_c; |
306 | |
307 | if (ARCH_X86) |
308 | ff_noise_init_x86(n); |
309 | |
310 | return 0; |
311 | } |
312 | |
313 | static av_cold void uninit(AVFilterContext *ctx) |
314 | { |
315 | NoiseContext *n = ctx->priv; |
316 | int i; |
317 | |
318 | for (i = 0; i < 4; i++) |
319 | av_freep(&n->param[i].noise); |
320 | } |
321 | |
322 | static const AVFilterPad noise_inputs[] = { |
323 | { |
324 | .name = "default", |
325 | .type = AVMEDIA_TYPE_VIDEO, |
326 | .filter_frame = filter_frame, |
327 | .config_props = config_input, |
328 | }, |
329 | { NULL } |
330 | }; |
331 | |
332 | static const AVFilterPad noise_outputs[] = { |
333 | { |
334 | .name = "default", |
335 | .type = AVMEDIA_TYPE_VIDEO, |
336 | }, |
337 | { NULL } |
338 | }; |
339 | |
340 | AVFilter ff_vf_noise = { |
341 | .name = "noise", |
342 | .description = NULL_IF_CONFIG_SMALL("Add noise."), |
343 | .priv_size = sizeof(NoiseContext), |
344 | .init = init, |
345 | .uninit = uninit, |
346 | .query_formats = query_formats, |
347 | .inputs = noise_inputs, |
348 | .outputs = noise_outputs, |
349 | .priv_class = &noise_class, |
350 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, |
351 | }; |
352 |