2 * Copyright (c) 2016 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/opt.h"
22 #include "libavutil/imgutils.h"
28 typedef struct BPNContext {
40 #define OFFSET(x) offsetof(BPNContext, x)
41 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
42 static 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},
48 AVFILTER_DEFINE_CLASS(bitplanenoise);
50 static int query_formats(AVFilterContext *ctx)
52 static const enum AVPixelFormat pixfmts[] = {
53 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
55 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
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,
60 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
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,
71 AVFilterFormats *formats = ff_make_format_list(pixfmts);
73 return AVERROR(ENOMEM);
74 return ff_set_common_formats(ctx, formats);
77 static int config_input(AVFilterLink *inlink)
79 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
80 AVFilterContext *ctx = inlink->dst;
81 BPNContext *s = ctx->priv;
83 s->nb_planes = desc->nb_components;
85 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
86 s->planeheight[0] = s->planeheight[3] = inlink->h;
87 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
88 s->planewidth[0] = s->planewidth[3] = inlink->w;
90 s->depth = desc->comp[0].depth;
95 #define CHECK_BIT(x, a, b, c) { \
96 bit = (((val[(x)] & mask) == (val[(x) + (a)] & mask)) + \
97 ((val[(x)] & mask) == (val[(x) + (b)] & mask)) + \
98 ((val[(x)] & mask) == (val[(x) + (c)] & mask))) > 1; \
100 dst[(x)] = factor * bit; \
101 stats[plane] += bit; }
103 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
105 AVFilterContext *ctx = inlink->dst;
106 AVFilterLink *outlink = ctx->outputs[0];
107 BPNContext *s = ctx->priv;
108 const int mask = (1 << (s->bitplane - 1));
109 const int factor = (1 << s->depth) - 1;
110 float stats[4] = { 0 };
112 int plane, y, x, bit;
113 AVFrame *out = s->filter ? NULL : in;
116 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
119 return AVERROR(ENOMEM);
121 av_frame_copy_props(out, in);
125 for (plane = 0; plane < s->nb_planes; plane++) {
126 const int linesize = in->linesize[plane];
127 const int dlinesize = out->linesize[plane];
128 uint8_t *val = in->data[plane];
129 uint8_t *dst = s->filter ? out->data[plane]: NULL;
131 for (y = 0; y < s->planeheight[plane] - 1; y++) {
132 CHECK_BIT(0, 1, 1 + linesize, linesize)
134 for (x = 1; x < s->planewidth[plane] - 1; x++) {
135 CHECK_BIT(x, -1, 1, linesize)
138 CHECK_BIT(x, -1, -1 + linesize, linesize)
145 CHECK_BIT(0, 1, 1 - linesize, -linesize)
147 for (x = 1; x < s->planewidth[plane] - 1; x++) {
148 CHECK_BIT(x, -1, 1, -linesize)
151 CHECK_BIT(x, -1, -1 - linesize, -linesize)
154 for (plane = 0; plane < s->nb_planes; plane++) {
155 const int linesize = in->linesize[plane] / 2;
156 const int dlinesize = out->linesize[plane] / 2;
157 uint16_t *val = (uint16_t *)in->data[plane];
158 uint16_t *dst = s->filter ? (uint16_t *)out->data[plane] : NULL;
160 val = (uint16_t *)in->data[plane];
161 for (y = 0; y < s->planeheight[plane] - 1; y++) {
162 CHECK_BIT(0, 1, 1 + linesize, linesize)
164 for (x = 1; x < s->planewidth[plane] - 1; x++) {
165 CHECK_BIT(x, -1, 1, linesize)
168 CHECK_BIT(x, -1, -1 + linesize, linesize)
175 CHECK_BIT(0, 1, 1 - linesize, -linesize)
177 for (x = 1; x < s->planewidth[plane] - 1; x++) {
178 CHECK_BIT(x, -1, 1, -linesize)
181 CHECK_BIT(x, -1, -1 -linesize, -linesize)
185 for (plane = 0; plane < s->nb_planes; plane++) {
188 stats[plane] /= s->planewidth[plane] * s->planeheight[plane];
189 snprintf(key, sizeof(key), "lavfi.bitplanenoise.%d.%d", plane, s->bitplane);
190 snprintf(metabuf, sizeof(metabuf), "%f", 1. - 2.* fabs((stats[plane] - 0.5)));
191 av_dict_set(&out->metadata, key, metabuf, 0);
197 return ff_filter_frame(outlink, out);
200 static const AVFilterPad inputs[] = {
203 .type = AVMEDIA_TYPE_VIDEO,
204 .filter_frame = filter_frame,
205 .config_props = config_input,
210 static const AVFilterPad outputs[] = {
213 .type = AVMEDIA_TYPE_VIDEO,
218 AVFilter ff_vf_bitplanenoise = {
219 .name = "bitplanenoise",
220 .description = NULL_IF_CONFIG_SMALL("Measure bit plane noise."),
221 .priv_size = sizeof(BPNContext),
222 .query_formats = query_formats,
225 .priv_class = &bitplanenoise_class,
226 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,