/* * 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; float decay; int planes; int depth; int nb_planes; int linesize[4]; int planewidth[4]; int planeheight[4]; float *old[4]; int (*lagfun[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); } LagfunContext; 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_GRAYF32, AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32, AV_PIX_FMT_NONE }; typedef struct ThreadData { AVFrame *in, *out; } ThreadData; #define LAGFUN(name, type, round, disabled) \ static int lagfun_frame##name(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; \ \ for (int p = 0; p < s->nb_planes; p++) { \ const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \ const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \ const int width = s->planewidth[p]; \ const type *src = (const type *)in->data[p] + \ slice_start * in->linesize[p] / sizeof(type); \ float *osrc = s->old[p] + slice_start * s->planewidth[p]; \ type *dst = (type *)out->data[p] + \ slice_start * out->linesize[p] / sizeof(type); \ \ if (!((1 << p) & s->planes)) { \ av_image_copy_plane((uint8_t *)dst, out->linesize[p], \ (const 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 < width; x++) { \ const float v = fmaxf(src[x], osrc[x] * decay); \ \ osrc[x] = v; \ if (disabled) { \ dst[x] = src[x]; \ } else { \ dst[x] = round(v); \ } \ } \ \ src += in->linesize[p] / sizeof(type); \ osrc += width; \ dst += out->linesize[p] / sizeof(type); \ } \ } \ \ return 0; \ } LAGFUN(8, uint8_t, lrintf, 0) LAGFUN(16, uint16_t, lrintf, 0) LAGFUN(32, float, , 0) LAGFUN(d8, uint8_t, lrintf, 1) LAGFUN(d16, uint16_t, lrintf, 1) LAGFUN(d32, float, , 1) static int config_output(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; LagfunContext *s = ctx->priv; AVFilterLink *inlink = ctx->inputs[0]; const AVPixFmtDescriptor *desc; int ret; desc = av_pix_fmt_desc_get(outlink->format); if (!desc) return AVERROR_BUG; s->nb_planes = av_pix_fmt_count_planes(outlink->format); s->depth = desc->comp[0].depth; s->lagfun[0] = s->depth <= 8 ? lagfun_frame8 : s->depth <= 16 ? lagfun_frame16 : lagfun_frame32; s->lagfun[1] = s->depth <= 8 ? lagfun_framed8 : s->depth <= 16 ? lagfun_framed16 : lagfun_framed32; if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) return ret; s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); s->planewidth[0] = s->planewidth[3] = inlink->w; s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); s->planeheight[0] = s->planeheight[3] = inlink->h; for (int p = 0; p < s->nb_planes; p++) { s->old[p] = av_calloc(s->planewidth[p] * s->planeheight[p], sizeof(*s->old[0])); if (!s->old[p]) return AVERROR(ENOMEM); } 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; out = ff_get_video_buffer(outlink, outlink->w, outlink->h); if (!out) { av_frame_free(&in); return AVERROR(ENOMEM); } av_frame_copy_props(out, in); td.out = out; td.in = in; ff_filter_execute(ctx, s->lagfun[!!ctx->is_disabled], &td, NULL, FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx))); av_frame_free(&in); return ff_filter_frame(outlink, out); } static av_cold void uninit(AVFilterContext *ctx) { LagfunContext *s = ctx->priv; for (int p = 0; p < s->nb_planes; p++) av_freep(&s->old[p]); } #define OFFSET(x) offsetof(LagfunContext, x) #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_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, }, }; static const AVFilterPad outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .config_props = config_output, }, }; AVFILTER_DEFINE_CLASS(lagfun); const AVFilter ff_vf_lagfun = { .name = "lagfun", .description = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."), .priv_size = sizeof(LagfunContext), .priv_class = &lagfun_class, .uninit = uninit, FILTER_OUTPUTS(outputs), FILTER_INPUTS(inputs), FILTER_PIXFMTS_ARRAY(pixel_fmts), .flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, .process_command = ff_filter_process_command, };