1 /*
2 * Copyright (c) 2020 Paul B Mahol
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "libavutil/imgutils.h"
22 #include "libavutil/pixdesc.h"
23 #include "libavutil/opt.h"
24 #include "avfilter.h"
25 #include "formats.h"
26 #include "internal.h"
27 #include "video.h"
28 #include "framesync.h"
29
30 typedef struct MaskedThresholdContext {
31 const AVClass *class;
32
33 int threshold;
34 int planes;
35
36 int linesize[4];
37 int planewidth[4], planeheight[4];
38 int nb_planes;
39 int depth;
40 FFFrameSync fs;
41
42 void (*maskedthreshold)(const uint8_t *src, const uint8_t *ref, uint8_t *dst, int threshold, int w);
43 } MaskedThresholdContext;
44
45 #define OFFSET(x) offsetof(MaskedThresholdContext, x)
46 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
47
48 typedef struct ThreadData {
49 AVFrame *src, *ref, *dst;
50 } ThreadData;
51
52 static const AVOption maskedthreshold_options[] = {
53 { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=1}, 0, UINT16_MAX, FLAGS },
54 { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
55 { NULL }
56 };
57
58 static const enum AVPixelFormat pix_fmts[] = {
59 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
60 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
61 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
62 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
63 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
64 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
65 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
66 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
67 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
68 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
69 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
70 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
71 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
72 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
73 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
74 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
75 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
76 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
77 AV_PIX_FMT_NONE
78 };
79
threshold8(const uint8_t * src,const uint8_t * ref,uint8_t * dst,int threshold,int w)80 static void threshold8(const uint8_t *src, const uint8_t *ref, uint8_t *dst, int threshold, int w)
81 {
82 for (int x = 0; x < w; x++)
83 dst[x] = FFABS(src[x] - ref[x]) <= threshold ? src[x] : ref[x];
84 }
85
threshold16(const uint8_t * ssrc,const uint8_t * rref,uint8_t * ddst,int threshold,int w)86 static void threshold16(const uint8_t *ssrc, const uint8_t *rref, uint8_t *ddst, int threshold, int w)
87 {
88 const uint16_t *src = (const uint16_t *)ssrc;
89 const uint16_t *ref = (const uint16_t *)rref;
90 uint16_t *dst = (uint16_t *)ddst;
91
92 for (int x = 0; x < w; x++)
93 dst[x] = FFABS(src[x] - ref[x]) <= threshold ? src[x] : ref[x];
94 }
95
config_input(AVFilterLink * inlink)96 static int config_input(AVFilterLink *inlink)
97 {
98 AVFilterContext *ctx = inlink->dst;
99 MaskedThresholdContext *s = ctx->priv;
100 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
101 int vsub, hsub, ret;
102
103 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
104
105 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
106 return ret;
107
108 hsub = desc->log2_chroma_w;
109 vsub = desc->log2_chroma_h;
110 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
111 s->planeheight[0] = s->planeheight[3] = inlink->h;
112 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
113 s->planewidth[0] = s->planewidth[3] = inlink->w;
114
115 s->depth = desc->comp[0].depth;
116
117 if (desc->comp[0].depth == 8)
118 s->maskedthreshold = threshold8;
119 else
120 s->maskedthreshold = threshold16;
121
122 return 0;
123 }
124
threshold_slice(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)125 static int threshold_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
126 {
127 MaskedThresholdContext *s = ctx->priv;
128 const int threshold = s->threshold;
129 ThreadData *td = arg;
130
131 for (int p = 0; p < s->nb_planes; p++) {
132 const ptrdiff_t src_linesize = td->src->linesize[p];
133 const ptrdiff_t ref_linesize = td->ref->linesize[p];
134 const ptrdiff_t dst_linesize = td->dst->linesize[p];
135 const int w = s->planewidth[p];
136 const int h = s->planeheight[p];
137 const int slice_start = (h * jobnr) / nb_jobs;
138 const int slice_end = (h * (jobnr+1)) / nb_jobs;
139 const uint8_t *src = td->src->data[p] + slice_start * src_linesize;
140 const uint8_t *ref = td->ref->data[p] + slice_start * ref_linesize;
141 uint8_t *dst = td->dst->data[p] + slice_start * dst_linesize;
142
143 if (!((1 << p) & s->planes)) {
144 av_image_copy_plane(dst, dst_linesize, ref, ref_linesize,
145 s->linesize[p], slice_end - slice_start);
146 continue;
147 }
148
149 for (int y = slice_start; y < slice_end; y++) {
150 s->maskedthreshold(src, ref, dst, threshold, w);
151
152 dst += dst_linesize;
153 src += src_linesize;
154 ref += ref_linesize;
155 }
156 }
157
158 return 0;
159 }
160
process_frame(FFFrameSync * fs)161 static int process_frame(FFFrameSync *fs)
162 {
163 AVFilterContext *ctx = fs->parent;
164 MaskedThresholdContext *s = fs->opaque;
165 AVFilterLink *outlink = ctx->outputs[0];
166 AVFrame *out, *src, *ref;
167 int ret;
168
169 if ((ret = ff_framesync_get_frame(&s->fs, 0, &src, 0)) < 0 ||
170 (ret = ff_framesync_get_frame(&s->fs, 1, &ref, 0)) < 0)
171 return ret;
172
173 if (ctx->is_disabled) {
174 out = av_frame_clone(src);
175 if (!out)
176 return AVERROR(ENOMEM);
177 } else {
178 ThreadData td;
179
180 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
181 if (!out)
182 return AVERROR(ENOMEM);
183 av_frame_copy_props(out, src);
184
185 td.src = src;
186 td.ref = ref;
187 td.dst = out;
188
189 ff_filter_execute(ctx, threshold_slice, &td, NULL,
190 FFMIN(s->planeheight[2], ff_filter_get_nb_threads(ctx)));
191 }
192 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
193
194 return ff_filter_frame(outlink, out);
195 }
196
config_output(AVFilterLink * outlink)197 static int config_output(AVFilterLink *outlink)
198 {
199 AVFilterContext *ctx = outlink->src;
200 MaskedThresholdContext *s = ctx->priv;
201 AVFilterLink *source = ctx->inputs[0];
202 AVFilterLink *ref = ctx->inputs[1];
203 FFFrameSyncIn *in;
204 int ret;
205
206 if (source->w != ref->w || source->h != ref->h) {
207 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
208 "(size %dx%d) do not match the corresponding "
209 "second input link %s parameters (%dx%d)\n",
210 ctx->input_pads[0].name, source->w, source->h,
211 ctx->input_pads[1].name, ref->w, ref->h);
212 return AVERROR(EINVAL);
213 }
214
215 outlink->w = source->w;
216 outlink->h = source->h;
217 outlink->sample_aspect_ratio = source->sample_aspect_ratio;
218 outlink->frame_rate = source->frame_rate;
219
220 if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
221 return ret;
222
223 in = s->fs.in;
224 in[0].time_base = source->time_base;
225 in[1].time_base = ref->time_base;
226 in[0].sync = 1;
227 in[0].before = EXT_STOP;
228 in[0].after = EXT_INFINITY;
229 in[1].sync = 1;
230 in[1].before = EXT_STOP;
231 in[1].after = EXT_INFINITY;
232 s->fs.opaque = s;
233 s->fs.on_event = process_frame;
234
235 ret = ff_framesync_configure(&s->fs);
236 outlink->time_base = s->fs.time_base;
237
238 return ret;
239 }
240
activate(AVFilterContext * ctx)241 static int activate(AVFilterContext *ctx)
242 {
243 MaskedThresholdContext *s = ctx->priv;
244 return ff_framesync_activate(&s->fs);
245 }
246
uninit(AVFilterContext * ctx)247 static av_cold void uninit(AVFilterContext *ctx)
248 {
249 MaskedThresholdContext *s = ctx->priv;
250
251 ff_framesync_uninit(&s->fs);
252 }
253
254 static const AVFilterPad maskedthreshold_inputs[] = {
255 {
256 .name = "source",
257 .type = AVMEDIA_TYPE_VIDEO,
258 .config_props = config_input,
259 },
260 {
261 .name = "reference",
262 .type = AVMEDIA_TYPE_VIDEO,
263 },
264 };
265
266 static const AVFilterPad maskedthreshold_outputs[] = {
267 {
268 .name = "default",
269 .type = AVMEDIA_TYPE_VIDEO,
270 .config_props = config_output,
271 },
272 };
273
274 AVFILTER_DEFINE_CLASS(maskedthreshold);
275
276 const AVFilter ff_vf_maskedthreshold = {
277 .name = "maskedthreshold",
278 .description = NULL_IF_CONFIG_SMALL("Pick pixels comparing absolute difference of two streams with threshold."),
279 .priv_class = &maskedthreshold_class,
280 .priv_size = sizeof(MaskedThresholdContext),
281 .uninit = uninit,
282 .activate = activate,
283 FILTER_INPUTS(maskedthreshold_inputs),
284 FILTER_OUTPUTS(maskedthreshold_outputs),
285 FILTER_PIXFMTS_ARRAY(pix_fmts),
286 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
287 .process_command = ff_filter_process_command,
288 };
289