--- /dev/null
+/*
+ * Copyright (c) 2019 Paul B Mahol
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/imgutils.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct LagfunContext {
+ const AVClass *class;
+ const AVPixFmtDescriptor *desc;
+ float decay;
+ int planes;
+
+ int depth;
+ int nb_planes;
+ int linesize[4];
+ int height[4];
+
+ AVFrame *old;
+
+ int (*lagfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
+} LagfunContext;
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pixel_fmts[] = {
+ AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
+ AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
+ AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUVJ411P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV440P10,
+ AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
+ AV_PIX_FMT_YUV440P12,
+ AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
+ AV_PIX_FMT_NONE
+ };
+ AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
+ if (!formats)
+ return AVERROR(ENOMEM);
+ return ff_set_common_formats(ctx, formats);
+}
+
+typedef struct ThreadData {
+ AVFrame *in, *out, *old;
+} ThreadData;
+
+static int lagfun_frame8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ LagfunContext *s = ctx->priv;
+ const float decay = s->decay;
+ ThreadData *td = arg;
+ AVFrame *in = td->in;
+ AVFrame *out = td->out;
+ AVFrame *old = td->old;
+
+ for (int p = 0; p < s->nb_planes; p++) {
+ const int slice_start = (s->height[p] * jobnr) / nb_jobs;
+ const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
+ const uint8_t *src = in->data[p] + slice_start * in->linesize[p];
+ const uint8_t *osrc = old->data[p] + slice_start * old->linesize[p];
+ uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
+
+ if (!((1 << p) & s->planes)) {
+ av_image_copy_plane(dst, out->linesize[p],
+ src, in->linesize[p],
+ s->linesize[p], slice_end - slice_start);
+ continue;
+ }
+
+ for (int y = slice_start; y < slice_end; y++) {
+ for (int x = 0; x < s->linesize[p]; x++)
+ dst[x] = FFMAX(src[x], osrc[x] * decay);
+
+ src += in->linesize[p];
+ osrc += old->linesize[p];
+ dst += out->linesize[p];
+ }
+ }
+
+ return 0;
+}
+
+static int lagfun_frame16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
+{
+ LagfunContext *s = ctx->priv;
+ const float decay = s->decay;
+ ThreadData *td = arg;
+ AVFrame *in = td->in;
+ AVFrame *out = td->out;
+ AVFrame *old = td->old;
+
+ for (int p = 0; p < s->nb_planes; p++) {
+ const int slice_start = (s->height[p] * jobnr) / nb_jobs;
+ const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
+ const uint16_t *src = (const uint16_t *)in->data[p] + slice_start * in->linesize[p] / 2;
+ const uint16_t *osrc = (const uint16_t *)old->data[p] + slice_start * old->linesize[p] / 2;
+ uint16_t *dst = (uint16_t *)out->data[p] + slice_start * out->linesize[p] / 2;
+
+ if (!((1 << p) & s->planes)) {
+ av_image_copy_plane((uint8_t *)dst, out->linesize[p],
+ (uint8_t *)src, in->linesize[p],
+ s->linesize[p], slice_end - slice_start);
+ continue;
+ }
+
+ for (int y = slice_start; y < slice_end; y++) {
+ for (int x = 0; x < s->linesize[p]; x++)
+ dst[x] = FFMAX(src[x], osrc[x] * decay);
+
+ src += in->linesize[p] / 2;
+ osrc += old->linesize[p] / 2;
+ dst += out->linesize[p] / 2;
+ }
+ }
+
+ return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ LagfunContext *s = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+ int ret;
+
+ s->desc = av_pix_fmt_desc_get(outlink->format);
+ if (!s->desc)
+ return AVERROR_BUG;
+ s->nb_planes = av_pix_fmt_count_planes(outlink->format);
+ s->depth = s->desc->comp[0].depth;
+ s->lagfun = s->depth <= 8 ? lagfun_frame8 : lagfun_frame16;
+
+ if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
+ return ret;
+
+ s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
+ s->height[0] = s->height[3] = inlink->h;
+
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ LagfunContext *s = ctx->priv;
+ ThreadData td;
+ AVFrame *out;
+
+ if (!s->old) {
+ s->old = av_frame_clone(in);
+ return ff_filter_frame(outlink, in);
+ }
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+ out->pts = in->pts;
+
+ td.out = out;
+ td.in = in;
+ td.old = s->old;
+ ctx->internal->execute(ctx, s->lagfun, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
+
+ av_frame_free(&s->old);
+ av_frame_free(&in);
+ s->old = av_frame_clone(out);
+ return ff_filter_frame(outlink, out);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ LagfunContext *s = ctx->priv;
+
+ av_frame_free(&s->old);
+}
+
+#define OFFSET(x) offsetof(LagfunContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption lagfun_options[] = {
+ { "decay", "set decay", OFFSET(decay), AV_OPT_TYPE_FLOAT, {.dbl=.95}, 0, 1, FLAGS },
+ { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
+ { NULL },
+};
+
+static const AVFilterPad inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(lagfun);
+
+AVFilter ff_vf_lagfun = {
+ .name = "lagfun",
+ .description = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
+ .priv_size = sizeof(LagfunContext),
+ .priv_class = &lagfun_class,
+ .query_formats = query_formats,
+ .uninit = uninit,
+ .outputs = outputs,
+ .inputs = inputs,
+ .flags = AVFILTER_FLAG_SLICE_THREADS,
+};
projects / ffmpeg / commitdiff