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;
53 static int query_formats(AVFilterContext *ctx)
55 static const enum AVPixelFormat pixel_fmts[] = {
56 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
57 AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
59 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
60 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
61 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
62 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
63 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
65 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
66 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
68 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
70 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
71 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
72 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
73 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
76 AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
78 return AVERROR(ENOMEM);
79 return ff_set_common_formats(ctx, formats);
82 static av_cold int init(AVFilterContext *ctx)
84 AmplifyContext *s = ctx->priv;
86 s->nb_inputs = s->radius * 2 + 1;
88 s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
90 return AVERROR(ENOMEM);
95 typedef struct ThreadData {
99 static int amplify_frame(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
101 AmplifyContext *s = ctx->priv;
102 ThreadData *td = arg;
103 AVFrame **in = td->in;
104 AVFrame *out = td->out;
105 const int radius = s->radius;
106 const int nb_inputs = s->nb_inputs;
107 const float threshold = s->threshold;
108 const float tolerance = s->tolerance;
109 const float factor = s->factor;
110 const int llimit = s->llimit;
111 const int hlimit = s->hlimit;
112 const int depth = s->depth;
116 for (p = 0; p < s->nb_planes; p++) {
117 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
118 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
119 uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
121 if (!((1 << p) & s->planes)) {
122 av_image_copy_plane(dst, out->linesize[p],
123 in[radius]->data[p] + slice_start * in[radius]->linesize[p],
124 in[radius]->linesize[p],
125 s->linesize[p], slice_end - slice_start);
129 for (y = slice_start; y < slice_end; y++) {
130 for (x = 0; x < s->linesize[p]; x++) {
131 int src = in[radius]->data[p][y * in[radius]->linesize[p] + x];
135 for (i = 0; i < nb_inputs; i++) {
136 sum += in[i]->data[p][y * in[i]->linesize[p] + x];
139 avg = sum / (float)nb_inputs;
141 if (fabsf(diff) < threshold && fabsf(diff) > tolerance) {
144 amp = -FFMIN(FFABS(diff * factor), llimit);
146 amp = FFMIN(FFABS(diff * factor), hlimit);
148 dst[x] = av_clip_uint8(src + amp);
154 dst += out->linesize[p];
158 for (p = 0; p < s->nb_planes; p++) {
159 const int slice_start = (s->height[p] * jobnr) / nb_jobs;
160 const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
161 uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
163 if (!((1 << p) & s->planes)) {
164 av_image_copy_plane((uint8_t *)dst, out->linesize[p],
165 in[radius]->data[p] + slice_start * in[radius]->linesize[p],
166 in[radius]->linesize[p],
167 s->linesize[p], slice_end - slice_start);
171 for (y = slice_start; y < slice_end; y++) {
172 for (x = 0; x < s->linesize[p] / 2; x++) {
173 int src = AV_RN16(in[radius]->data[p] + y * in[radius]->linesize[p] + x * 2);
177 for (i = 0; i < nb_inputs; i++) {
178 sum += AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
181 avg = sum / (float)nb_inputs;
184 if (fabsf(diff) < threshold && fabsf(diff) > tolerance) {
187 amp = -FFMIN(FFABS(diff * factor), llimit);
189 amp = FFMIN(FFABS(diff * factor), hlimit);
191 dst[x] = av_clip_uintp2_c(src + amp, depth);
197 dst += out->linesize[p] / 2;
205 static int config_output(AVFilterLink *outlink)
207 AVFilterContext *ctx = outlink->src;
208 AmplifyContext *s = ctx->priv;
209 AVFilterLink *inlink = ctx->inputs[0];
212 s->desc = av_pix_fmt_desc_get(outlink->format);
215 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
216 s->depth = s->desc->comp[0].depth;
218 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
221 s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
222 s->height[0] = s->height[3] = inlink->h;
227 static av_cold void uninit(AVFilterContext *ctx)
229 AmplifyContext *s = ctx->priv;
233 for (i = 0; i < s->nb_frames; i++)
234 av_frame_free(&s->frames[i]);
236 av_freep(&s->frames);
239 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
241 AVFilterContext *ctx = inlink->dst;
242 AVFilterLink *outlink = ctx->outputs[0];
243 AmplifyContext *s = ctx->priv;
247 if (s->nb_frames < s->nb_inputs) {
248 s->frames[s->nb_frames] = in;
252 av_frame_free(&s->frames[0]);
253 memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
254 s->frames[s->nb_inputs - 1] = in;
257 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
259 return AVERROR(ENOMEM);
260 out->pts = s->frames[0]->pts;
264 ctx->internal->execute(ctx, amplify_frame, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
266 return ff_filter_frame(outlink, out);
269 #define OFFSET(x) offsetof(AmplifyContext, x)
270 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
272 static const AVOption amplify_options[] = {
273 { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=2}, 1, 63, .flags = FLAGS },
274 { "factor", "set factor", OFFSET(factor), AV_OPT_TYPE_FLOAT, {.dbl=2}, 0, UINT16_MAX, .flags = FLAGS },
275 { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=10}, 0, UINT16_MAX, .flags = FLAGS },
276 { "tolerance", "set tolerance", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, UINT16_MAX, .flags = FLAGS },
277 { "low", "set low limit for amplification", OFFSET(llimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = FLAGS },
278 { "high", "set high limit for amplification", OFFSET(hlimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = FLAGS },
279 { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, FLAGS },
283 static const AVFilterPad inputs[] = {
286 .type = AVMEDIA_TYPE_VIDEO,
287 .filter_frame = filter_frame,
292 static const AVFilterPad outputs[] = {
295 .type = AVMEDIA_TYPE_VIDEO,
296 .config_props = config_output,
301 AVFILTER_DEFINE_CLASS(amplify);
303 AVFilter ff_vf_amplify = {
305 .description = NULL_IF_CONFIG_SMALL("Amplify changes between successive video frames."),
306 .priv_size = sizeof(AmplifyContext),
307 .priv_class = &lify_class,
308 .query_formats = query_formats,
313 .flags = AVFILTER_FLAG_SLICE_THREADS,