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path: root/libavfilter/vf_bitplanenoise.c (plain)
blob: 82318a70616178cd2a5b8f221fe2909275b23083
1/*
2 * Copyright (c) 2016 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/opt.h"
22#include "libavutil/imgutils.h"
23#include "avfilter.h"
24#include "formats.h"
25#include "internal.h"
26#include "video.h"
27
28typedef struct BPNContext {
29 const AVClass *class;
30
31 int bitplane;
32 int filter;
33
34 int nb_planes;
35 int planeheight[4];
36 int planewidth[4];
37 int depth;
38} BPNContext;
39
40#define OFFSET(x) offsetof(BPNContext, x)
41#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
42static const AVOption bitplanenoise_options[] = {
43 { "bitplane", "set bit plane to use for measuring noise", OFFSET(bitplane), AV_OPT_TYPE_INT, {.i64=1}, 1, 16, FLAGS},
44 { "filter", "show noisy pixels", OFFSET(filter), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
45 { NULL }
46};
47
48AVFILTER_DEFINE_CLASS(bitplanenoise);
49
50static int query_formats(AVFilterContext *ctx)
51{
52 static const enum AVPixelFormat pixfmts[] = {
53 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
54 AV_PIX_FMT_YUV440P,
55 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
56 AV_PIX_FMT_YUVJ440P,
57 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9,
58 AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10,
59 AV_PIX_FMT_YUV440P10,
60 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
61 AV_PIX_FMT_YUV440P12,
62 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
63 AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16,
64 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
65 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
66 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16,
67 AV_PIX_FMT_NONE
68 };
69
70 AVFilterFormats *formats = ff_make_format_list(pixfmts);
71 if (!formats)
72 return AVERROR(ENOMEM);
73 return ff_set_common_formats(ctx, formats);
74}
75
76static int config_input(AVFilterLink *inlink)
77{
78 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
79 AVFilterContext *ctx = inlink->dst;
80 BPNContext *s = ctx->priv;
81
82 s->nb_planes = desc->nb_components;
83
84 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
85 s->planeheight[0] = s->planeheight[3] = inlink->h;
86 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
87 s->planewidth[0] = s->planewidth[3] = inlink->w;
88
89 s->depth = desc->comp[0].depth;
90
91 return 0;
92}
93
94#define CHECK_BIT(x, a, b, c) { \
95 bit = (((val[(x)] & mask) == (val[(x) + (a)] & mask)) + \
96 ((val[(x)] & mask) == (val[(x) + (b)] & mask)) + \
97 ((val[(x)] & mask) == (val[(x) + (c)] & mask))) > 1; \
98 if (dst) \
99 dst[(x)] = factor * bit; \
100 stats[plane] += bit; }
101
102static int filter_frame(AVFilterLink *inlink, AVFrame *in)
103{
104 AVFilterContext *ctx = inlink->dst;
105 AVFilterLink *outlink = ctx->outputs[0];
106 BPNContext *s = ctx->priv;
107 const int mask = (1 << (s->bitplane - 1));
108 const int factor = (1 << s->depth) - 1;
109 float stats[4] = { 0 };
110 char metabuf[128];
111 int plane, y, x, bit;
112 AVFrame *out = s->filter ? NULL : in;
113
114 if (!out) {
115 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
116 if (!out) {
117 av_frame_free(&in);
118 return AVERROR(ENOMEM);
119 }
120 av_frame_copy_props(out, in);
121 }
122
123 if (s->depth <= 8) {
124 for (plane = 0; plane < s->nb_planes; plane++) {
125 const int linesize = in->linesize[plane];
126 const int dlinesize = out->linesize[plane];
127 uint8_t *val = in->data[plane];
128 uint8_t *dst = s->filter ? out->data[plane]: NULL;
129
130 for (y = 0; y < s->planeheight[plane] - 1; y++) {
131 CHECK_BIT(0, 1, 1 + linesize, linesize)
132
133 for (x = 1; x < s->planewidth[plane] - 1; x++) {
134 CHECK_BIT(x, -1, 1, linesize)
135 }
136
137 CHECK_BIT(x, -1, -1 + linesize, linesize)
138
139 val += linesize;
140 if (dst)
141 dst += dlinesize;
142 }
143
144 CHECK_BIT(0, 1, 1 - linesize, -linesize)
145
146 for (x = 1; x < s->planewidth[plane] - 1; x++) {
147 CHECK_BIT(x, -1, 1, -linesize)
148 }
149
150 CHECK_BIT(x, -1, -1 - linesize, -linesize)
151 }
152 } else {
153 for (plane = 0; plane < s->nb_planes; plane++) {
154 const int linesize = in->linesize[plane] / 2;
155 const int dlinesize = out->linesize[plane] / 2;
156 uint16_t *val = (uint16_t *)in->data[plane];
157 uint16_t *dst = s->filter ? (uint16_t *)out->data[plane] : NULL;
158
159 val = (uint16_t *)in->data[plane];
160 for (y = 0; y < s->planeheight[plane] - 1; y++) {
161 CHECK_BIT(0, 1, 1 + linesize, linesize)
162
163 for (x = 1; x < s->planewidth[plane] - 1; x++) {
164 CHECK_BIT(x, -1, 1, linesize)
165 }
166
167 CHECK_BIT(x, -1, -1 + linesize, linesize)
168
169 val += linesize;
170 if (dst)
171 dst += dlinesize;
172 }
173
174 CHECK_BIT(0, 1, 1 - linesize, -linesize)
175
176 for (x = 1; x < s->planewidth[plane] - 1; x++) {
177 CHECK_BIT(x, -1, 1, -linesize)
178 }
179
180 CHECK_BIT(x, -1, -1 -linesize, -linesize)
181 }
182 }
183
184 for (plane = 0; plane < s->nb_planes; plane++) {
185 char key[32];
186
187 stats[plane] /= s->planewidth[plane] * s->planeheight[plane];
188 snprintf(key, sizeof(key), "lavfi.bitplanenoise.%d.%d", plane, s->bitplane);
189 snprintf(metabuf, sizeof(metabuf), "%f", 1. - 2.* fabs((stats[plane] - 0.5)));
190 av_dict_set(&out->metadata, key, metabuf, 0);
191 }
192
193 if (out != in)
194 av_frame_free(&in);
195
196 return ff_filter_frame(outlink, out);
197}
198
199static const AVFilterPad inputs[] = {
200 {
201 .name = "default",
202 .type = AVMEDIA_TYPE_VIDEO,
203 .filter_frame = filter_frame,
204 .config_props = config_input,
205 },
206 { NULL }
207};
208
209static const AVFilterPad outputs[] = {
210 {
211 .name = "default",
212 .type = AVMEDIA_TYPE_VIDEO,
213 },
214 { NULL }
215};
216
217AVFilter ff_vf_bitplanenoise = {
218 .name = "bitplanenoise",
219 .description = NULL_IF_CONFIG_SMALL("Measure bit plane noise."),
220 .priv_size = sizeof(BPNContext),
221 .query_formats = query_formats,
222 .inputs = inputs,
223 .outputs = outputs,
224 .priv_class = &bitplanenoise_class,
225 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
226};
227
generated by cgit at 2024-05-18 01:37:43 (GMT)