2 * Copyright (c) 2018 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/imgutils.h"
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixdesc.h"
31 typedef struct AmplifyContext {
33 const AVPixFmtDescriptor *desc;
52 static int query_formats(AVFilterContext *ctx)
54 static const enum AVPixelFormat pixel_fmts[] = {
55 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
56 AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12,
58 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
59 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
60 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
61 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
62 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
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,
67 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
69 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
70 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
71 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
72 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
75 AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
77 return AVERROR(ENOMEM);
78 return ff_set_common_formats(ctx, formats);
81 static av_cold int init(AVFilterContext *ctx)
83 AmplifyContext *s = ctx->priv;
85 s->nb_inputs = s->radius * 2 + 1;
87 s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
89 return AVERROR(ENOMEM);
94 typedef struct ThreadData {
98 static int amplify_frame(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
100 AmplifyContext *s = ctx->priv;
101 ThreadData *td = arg;
102 AVFrame **in = td->in;
103 AVFrame *out = td->out;
104 const int radius = s->radius;
105 const int nb_inputs = s->nb_inputs;
106 const float threshold = s->threshold;
107 const float factor = s->factor;
108 const int llimit = s->llimit;
109 const int hlimit = s->hlimit;
110 const int depth = s->depth;
114 for (p = 0; p < s->nb_planes; p++) {
115 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
116 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
117 uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
119 if (!((1 << p) & s->planes)) {
120 av_image_copy_plane(dst, out->linesize[p],
121 in[radius]->data[p] + slice_start * in[radius]->linesize[p],
122 in[radius]->linesize[p],
123 s->linesize[p], slice_end - slice_start);
127 for (y = slice_start; y < slice_end; y++) {
128 for (x = 0; x < s->linesize[p]; x++) {
129 int src = in[radius]->data[p][y * in[radius]->linesize[p] + x];
133 for (i = 0; i < nb_inputs; i++) {
134 sum += in[i]->data[p][y * in[i]->linesize[p] + x];
137 avg = sum / (float)nb_inputs;
139 if (fabsf(diff) < threshold) {
142 amp = -FFMIN(FFABS(diff * factor), llimit);
144 amp = FFMIN(FFABS(diff * factor), hlimit);
146 dst[x] = av_clip_uint8(src + amp);
152 dst += out->linesize[p];
156 for (p = 0; p < s->nb_planes; p++) {
157 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
158 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
159 uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
161 if (!((1 << p) & s->planes)) {
162 av_image_copy_plane((uint8_t *)dst, out->linesize[p],
163 in[radius]->data[p] + slice_start * in[radius]->linesize[p],
164 in[radius]->linesize[p],
165 s->linesize[p], slice_end - slice_start);
169 for (y = slice_start; y < slice_end; y++) {
170 for (x = 0; x < s->linesize[p] / 2; x++) {
171 int src = AV_RN16(in[radius]->data[p] + y * in[radius]->linesize[p] + x * 2);
175 for (i = 0; i < nb_inputs; i++) {
176 sum += AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
179 avg = sum / (float)nb_inputs;
182 if (fabsf(diff) < threshold) {
185 amp = -FFMIN(FFABS(diff * factor), llimit);
187 amp = FFMIN(FFABS(diff * factor), hlimit);
189 dst[x] = av_clip_uintp2_c(src + amp, depth);
195 dst += out->linesize[p] / 2;
203 static int config_output(AVFilterLink *outlink)
205 AVFilterContext *ctx = outlink->src;
206 AmplifyContext *s = ctx->priv;
207 AVFilterLink *inlink = ctx->inputs[0];
210 s->desc = av_pix_fmt_desc_get(outlink->format);
213 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
214 s->depth = s->desc->comp[0].depth;
216 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
219 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
220 s->height[0] = s->height[3] = inlink->h;
225 static av_cold void uninit(AVFilterContext *ctx)
227 AmplifyContext *s = ctx->priv;
231 for (i = 0; i < s->nb_frames; i++)
232 av_frame_free(&s->frames[i]);
234 av_freep(&s->frames);
237 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
239 AVFilterContext *ctx = inlink->dst;
240 AVFilterLink *outlink = ctx->outputs[0];
241 AmplifyContext *s = ctx->priv;
245 if (s->nb_frames < s->nb_inputs) {
246 s->frames[s->nb_frames] = in;
250 av_frame_free(&s->frames[0]);
251 memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
252 s->frames[s->nb_inputs - 1] = in;
255 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
257 return AVERROR(ENOMEM);
258 out->pts = s->frames[0]->pts;
262 ctx->internal->execute(ctx, amplify_frame, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
264 return ff_filter_frame(outlink, out);
267 #define OFFSET(x) offsetof(AmplifyContext, x)
268 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
270 static const AVOption amplify_options[] = {
271 { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=2}, 1, 63, .flags = FLAGS },
272 { "factor", "set factor", OFFSET(factor), AV_OPT_TYPE_FLOAT, {.dbl=2}, 0, UINT16_MAX, .flags = FLAGS },
273 { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=10}, 0, UINT16_MAX, .flags = FLAGS },
274 { "low", "set low limit for amplification", OFFSET(llimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = FLAGS },
275 { "high", "set high limit for amplification", OFFSET(hlimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = FLAGS },
276 { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, FLAGS },
280 static const AVFilterPad inputs[] = {
283 .type = AVMEDIA_TYPE_VIDEO,
284 .filter_frame = filter_frame,
289 static const AVFilterPad outputs[] = {
292 .type = AVMEDIA_TYPE_VIDEO,
293 .config_props = config_output,
298 AVFILTER_DEFINE_CLASS(amplify);
300 AVFilter ff_vf_amplify = {
302 .description = NULL_IF_CONFIG_SMALL("Amplify changes between successive video frames."),
303 .priv_size = sizeof(AmplifyContext),
304 .priv_class = &lify_class,
305 .query_formats = query_formats,
310 .flags = AVFILTER_FLAG_SLICE_THREADS,