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2ba45a60 DM |
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" | |
2ba45a60 DM |
32 | #include "avfilter.h" |
33 | #include "formats.h" | |
34 | #include "internal.h" | |
f6fa7814 | 35 | #include "vf_noise.h" |
2ba45a60 DM |
36 | #include "video.h" |
37 | ||
2ba45a60 DM |
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 | ||
f6fa7814 | 82 | av_lfg_init(&fp->lfg, fp->seed + comp*31415U); |
2ba45a60 DM |
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 | ||
2ba45a60 DM |
129 | fp->noise = noise; |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int query_formats(AVFilterContext *ctx) | |
134 | { | |
135 | AVFilterFormats *formats = NULL; | |
136 | int fmt; | |
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_minus1 + 1) & 7)) | |
141 | ff_add_format(&formats, fmt); | |
142 | } | |
143 | ||
144 | ff_set_common_formats(ctx, formats); | |
145 | return 0; | |
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] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); | |
160 | n->height[0] = n->height[3] = inlink->h; | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
f6fa7814 DM |
165 | void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, |
166 | int len, int shift) | |
2ba45a60 DM |
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 | ||
f6fa7814 DM |
178 | void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, |
179 | int len, const int8_t * const *shift) | |
2ba45a60 DM |
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 | ||
2ba45a60 DM |
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; | |
f6fa7814 | 197 | int y; |
2ba45a60 DM |
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); | |
f6fa7814 DM |
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]; | |
2ba45a60 | 211 | |
f6fa7814 DM |
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 | } | |
2ba45a60 DM |
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; | |
f6fa7814 | 249 | int comp, i; |
2ba45a60 DM |
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 | ||
f6fa7814 DM |
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 | ||
2ba45a60 DM |
274 | td.in = inpicref; td.out = out; |
275 | ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(n->height[0], ctx->graph->nb_threads)); | |
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; | |
2ba45a60 DM |
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 | ||
f6fa7814 DM |
304 | n->line_noise = ff_line_noise_c; |
305 | n->line_noise_avg = ff_line_noise_avg_c; | |
2ba45a60 | 306 | |
f6fa7814 DM |
307 | if (ARCH_X86) |
308 | ff_noise_init_x86(n); | |
2ba45a60 DM |
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 | }; |