2018-04-27 16:13:38 +00:00
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/*
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* Copyright (c) 2018 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct AmplifyContext {
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const AVClass *class;
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const AVPixFmtDescriptor *desc;
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int radius;
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float factor;
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float threshold;
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2019-02-22 22:32:27 +00:00
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float tolerance;
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2018-04-27 16:13:38 +00:00
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int planes;
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2018-05-04 12:19:03 +00:00
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int llimit;
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int hlimit;
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2018-04-27 16:13:38 +00:00
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int nb_inputs;
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int nb_frames;
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int depth;
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int nb_planes;
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int linesize[4];
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int height[4];
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AVFrame **frames;
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} AmplifyContext;
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2021-09-29 13:57:43 +00:00
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static const enum AVPixelFormat pixel_fmts[] = {
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
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AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
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AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
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AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
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AV_PIX_FMT_YUVJ411P,
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV440P10,
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
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AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
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AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_NONE
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};
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2018-04-27 16:13:38 +00:00
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static av_cold int init(AVFilterContext *ctx)
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{
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AmplifyContext *s = ctx->priv;
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s->nb_inputs = s->radius * 2 + 1;
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s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
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if (!s->frames)
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return AVERROR(ENOMEM);
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return 0;
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}
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typedef struct ThreadData {
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AVFrame **in, *out;
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} ThreadData;
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static int amplify_frame(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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AmplifyContext *s = ctx->priv;
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ThreadData *td = arg;
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AVFrame **in = td->in;
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AVFrame *out = td->out;
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const int radius = s->radius;
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const int nb_inputs = s->nb_inputs;
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const float threshold = s->threshold;
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2019-02-22 22:32:27 +00:00
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const float tolerance = s->tolerance;
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2018-04-27 16:13:38 +00:00
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const float factor = s->factor;
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2018-05-04 12:19:03 +00:00
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const int llimit = s->llimit;
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const int hlimit = s->hlimit;
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const int depth = s->depth;
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2018-04-27 16:13:38 +00:00
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int i, p, x, y;
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if (s->depth <= 8) {
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for (p = 0; p < s->nb_planes; p++) {
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const int slice_start = (s->height[p] * jobnr) / nb_jobs;
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const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
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uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
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if (!((1 << p) & s->planes)) {
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av_image_copy_plane(dst, out->linesize[p],
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in[radius]->data[p] + slice_start * in[radius]->linesize[p],
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in[radius]->linesize[p],
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s->linesize[p], slice_end - slice_start);
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continue;
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}
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for (y = slice_start; y < slice_end; y++) {
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for (x = 0; x < s->linesize[p]; x++) {
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int src = in[radius]->data[p][y * in[radius]->linesize[p] + x];
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float diff, avg;
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int sum = 0;
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for (i = 0; i < nb_inputs; i++) {
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sum += in[i]->data[p][y * in[i]->linesize[p] + x];
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}
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avg = sum / (float)nb_inputs;
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diff = src - avg;
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2019-02-22 22:32:27 +00:00
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if (fabsf(diff) < threshold && fabsf(diff) > tolerance) {
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2018-05-04 12:19:03 +00:00
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int amp;
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if (diff < 0) {
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amp = -FFMIN(FFABS(diff * factor), llimit);
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} else {
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amp = FFMIN(FFABS(diff * factor), hlimit);
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}
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dst[x] = av_clip_uint8(src + amp);
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} else {
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2018-04-27 16:13:38 +00:00
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dst[x] = src;
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2018-05-04 12:19:03 +00:00
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}
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2018-04-27 16:13:38 +00:00
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}
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dst += out->linesize[p];
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}
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}
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} else {
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for (p = 0; p < s->nb_planes; p++) {
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const int slice_start = (s->height[p] * jobnr) / nb_jobs;
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const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
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uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
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if (!((1 << p) & s->planes)) {
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av_image_copy_plane((uint8_t *)dst, out->linesize[p],
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in[radius]->data[p] + slice_start * in[radius]->linesize[p],
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in[radius]->linesize[p],
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s->linesize[p], slice_end - slice_start);
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continue;
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}
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for (y = slice_start; y < slice_end; y++) {
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for (x = 0; x < s->linesize[p] / 2; x++) {
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int src = AV_RN16(in[radius]->data[p] + y * in[radius]->linesize[p] + x * 2);
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float diff, avg;
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int sum = 0;
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for (i = 0; i < nb_inputs; i++) {
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sum += AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
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}
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avg = sum / (float)nb_inputs;
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diff = src - avg;
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2019-02-22 22:32:27 +00:00
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if (fabsf(diff) < threshold && fabsf(diff) > tolerance) {
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2018-05-04 12:19:03 +00:00
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int amp;
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if (diff < 0) {
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amp = -FFMIN(FFABS(diff * factor), llimit);
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} else {
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amp = FFMIN(FFABS(diff * factor), hlimit);
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}
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2018-05-31 14:22:59 +00:00
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dst[x] = av_clip_uintp2_c(src + amp, depth);
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2018-05-04 12:19:03 +00:00
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} else {
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2018-04-27 16:13:38 +00:00
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dst[x] = src;
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2018-05-04 12:19:03 +00:00
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}
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2018-04-27 16:13:38 +00:00
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}
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dst += out->linesize[p] / 2;
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}
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}
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}
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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AmplifyContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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int ret;
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s->desc = av_pix_fmt_desc_get(outlink->format);
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if (!s->desc)
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return AVERROR_BUG;
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s->nb_planes = av_pix_fmt_count_planes(outlink->format);
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s->depth = s->desc->comp[0].depth;
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if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
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return ret;
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s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
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s->height[0] = s->height[3] = inlink->h;
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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AmplifyContext *s = ctx->priv;
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int i;
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2018-05-14 14:00:00 +00:00
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if (s->frames) {
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for (i = 0; i < s->nb_frames; i++)
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2019-10-17 09:32:27 +00:00
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av_frame_free(&s->frames[i]);
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2018-05-14 14:00:00 +00:00
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}
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2018-04-27 16:13:38 +00:00
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av_freep(&s->frames);
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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AmplifyContext *s = ctx->priv;
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ThreadData td;
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AVFrame *out;
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if (s->nb_frames < s->nb_inputs) {
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s->frames[s->nb_frames] = in;
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s->nb_frames++;
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return 0;
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} else {
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av_frame_free(&s->frames[0]);
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memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
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s->frames[s->nb_inputs - 1] = in;
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}
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2019-11-21 17:34:07 +00:00
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if (!ctx->is_disabled) {
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out)
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return AVERROR(ENOMEM);
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av_frame_copy_props(out, s->frames[0]);
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td.out = out;
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td.in = s->frames;
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2021-08-15 19:33:25 +00:00
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ff_filter_execute(ctx, amplify_frame, &td, NULL,
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FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
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2019-11-21 17:34:07 +00:00
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} else {
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out = av_frame_clone(s->frames[s->radius]);
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if (!out)
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return AVERROR(ENOMEM);
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out->pts = s->frames[0]->pts;
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}
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2018-04-27 16:13:38 +00:00
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return ff_filter_frame(outlink, out);
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}
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#define OFFSET(x) offsetof(AmplifyContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
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2019-10-08 11:44:58 +00:00
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#define VFT AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
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2018-04-27 16:13:38 +00:00
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static const AVOption amplify_options[] = {
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{ "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=2}, 1, 63, .flags = FLAGS },
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2019-10-08 11:44:58 +00:00
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{ "factor", "set factor", OFFSET(factor), AV_OPT_TYPE_FLOAT, {.dbl=2}, 0, UINT16_MAX, .flags = VFT },
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{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=10}, 0, UINT16_MAX, .flags = VFT },
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{ "tolerance", "set tolerance", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, UINT16_MAX, .flags = VFT },
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{ "low", "set low limit for amplification", OFFSET(llimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = VFT },
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{ "high", "set high limit for amplification", OFFSET(hlimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = VFT },
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{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, VFT },
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2018-04-27 16:13:38 +00:00
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{ NULL },
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};
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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},
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};
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static const AVFilterPad outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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};
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AVFILTER_DEFINE_CLASS(amplify);
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2021-04-19 16:33:56 +00:00
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const AVFilter ff_vf_amplify = {
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2018-04-27 16:13:38 +00:00
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.name = "amplify",
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.description = NULL_IF_CONFIG_SMALL("Amplify changes between successive video frames."),
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.priv_size = sizeof(AmplifyContext),
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.priv_class = &lify_class,
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2021-08-12 11:05:31 +00:00
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FILTER_OUTPUTS(outputs),
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FILTER_INPUTS(inputs),
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2021-09-27 12:39:02 +00:00
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FILTER_PIXFMTS_ARRAY(pixel_fmts),
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2018-04-27 16:13:38 +00:00
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.init = init,
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.uninit = uninit,
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2019-11-21 17:34:07 +00:00
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
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2019-10-08 11:44:58 +00:00
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.process_command = ff_filter_process_command,
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2018-04-27 16:13:38 +00:00
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};
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