2 * Copyright (c) 2019 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 LagfunContext {
44 int (*lagfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
47 static int query_formats(AVFilterContext *ctx)
49 static const enum AVPixelFormat pixel_fmts[] = {
50 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
51 AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
53 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
54 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
55 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
56 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
57 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
59 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
60 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
62 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
64 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
65 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
66 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
67 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
70 AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
72 return AVERROR(ENOMEM);
73 return ff_set_common_formats(ctx, formats);
76 typedef struct ThreadData {
80 static int lagfun_frame8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
82 LagfunContext *s = ctx->priv;
83 const float decay = s->decay;
86 AVFrame *out = td->out;
88 for (int p = 0; p < s->nb_planes; p++) {
89 const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
90 const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
91 const uint8_t *src = in->data[p] + slice_start * in->linesize[p];
92 float *osrc = s->old[p] + slice_start * s->planewidth[p];
93 uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
95 if (!((1 << p) & s->planes)) {
96 av_image_copy_plane(dst, out->linesize[p],
98 s->linesize[p], slice_end - slice_start);
102 for (int y = slice_start; y < slice_end; y++) {
103 for (int x = 0; x < s->planewidth[p]; x++) {
104 float v = FFMAX(src[x], osrc[x] * decay);
110 src += in->linesize[p];
111 osrc += s->planewidth[p];
112 dst += out->linesize[p];
119 static int lagfun_frame16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
121 LagfunContext *s = ctx->priv;
122 const float decay = s->decay;
123 ThreadData *td = arg;
124 AVFrame *in = td->in;
125 AVFrame *out = td->out;
127 for (int p = 0; p < s->nb_planes; p++) {
128 const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
129 const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
130 const uint16_t *src = (const uint16_t *)in->data[p] + slice_start * in->linesize[p] / 2;
131 float *osrc = s->old[p] + slice_start * s->planewidth[p];
132 uint16_t *dst = (uint16_t *)out->data[p] + slice_start * out->linesize[p] / 2;
134 if (!((1 << p) & s->planes)) {
135 av_image_copy_plane((uint8_t *)dst, out->linesize[p],
136 (uint8_t *)src, in->linesize[p],
137 s->linesize[p], slice_end - slice_start);
141 for (int y = slice_start; y < slice_end; y++) {
142 for (int x = 0; x < s->planewidth[p]; x++) {
143 float v = FFMAX(src[x], osrc[x] * decay);
149 src += in->linesize[p] / 2;
150 osrc += s->planewidth[p];
151 dst += out->linesize[p] / 2;
158 static int config_output(AVFilterLink *outlink)
160 AVFilterContext *ctx = outlink->src;
161 LagfunContext *s = ctx->priv;
162 AVFilterLink *inlink = ctx->inputs[0];
163 const AVPixFmtDescriptor *desc;
166 desc = av_pix_fmt_desc_get(outlink->format);
169 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
170 s->depth = desc->comp[0].depth;
171 s->lagfun = s->depth <= 8 ? lagfun_frame8 : lagfun_frame16;
173 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
176 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
177 s->planewidth[0] = s->planewidth[3] = inlink->w;
178 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
179 s->planeheight[0] = s->planeheight[3] = inlink->h;
181 for (int p = 0; p < s->nb_planes; p++) {
182 s->old[p] = av_calloc(s->planewidth[p] * s->planeheight[p], sizeof(*s->old[0]));
184 return AVERROR(ENOMEM);
190 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
192 AVFilterContext *ctx = inlink->dst;
193 AVFilterLink *outlink = ctx->outputs[0];
194 LagfunContext *s = ctx->priv;
198 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
201 return AVERROR(ENOMEM);
207 ctx->internal->execute(ctx, s->lagfun, &td, NULL, FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
210 return ff_filter_frame(outlink, out);
213 static av_cold void uninit(AVFilterContext *ctx)
215 LagfunContext *s = ctx->priv;
217 for (int p = 0; p < s->nb_planes; p++)
218 av_freep(&s->old[p]);
221 #define OFFSET(x) offsetof(LagfunContext, x)
222 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
224 static const AVOption lagfun_options[] = {
225 { "decay", "set decay", OFFSET(decay), AV_OPT_TYPE_FLOAT, {.dbl=.95}, 0, 1, FLAGS },
226 { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
230 static const AVFilterPad inputs[] = {
233 .type = AVMEDIA_TYPE_VIDEO,
234 .filter_frame = filter_frame,
239 static const AVFilterPad outputs[] = {
242 .type = AVMEDIA_TYPE_VIDEO,
243 .config_props = config_output,
248 AVFILTER_DEFINE_CLASS(lagfun);
250 AVFilter ff_vf_lagfun = {
252 .description = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
253 .priv_size = sizeof(LagfunContext),
254 .priv_class = &lagfun_class,
255 .query_formats = query_formats,
259 .flags = AVFILTER_FLAG_SLICE_THREADS,
260 .process_command = ff_filter_process_command,