233 lines
9.2 KiB
C
233 lines
9.2 KiB
C
/*
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* Copyright (c) 2019 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/mem.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 "internal.h"
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#include "video.h"
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typedef struct LagfunContext {
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const AVClass *class;
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float decay;
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int planes;
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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 planewidth[4];
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int planeheight[4];
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float *old[4];
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int (*lagfun[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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} LagfunContext;
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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_GRAYF32, AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32,
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AV_PIX_FMT_NONE
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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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#define LAGFUN(name, type, round, disabled) \
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static int lagfun_frame##name(AVFilterContext *ctx, void *arg, \
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int jobnr, int nb_jobs) \
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{ \
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LagfunContext *s = ctx->priv; \
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const float decay = s->decay; \
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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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\
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for (int p = 0; p < s->nb_planes; p++) { \
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const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
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const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
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const int width = s->planewidth[p]; \
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const type *src = (const type *)in->data[p] + \
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slice_start * in->linesize[p] / sizeof(type); \
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float *osrc = s->old[p] + slice_start * s->planewidth[p]; \
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type *dst = (type *)out->data[p] + \
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slice_start * out->linesize[p] / sizeof(type); \
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\
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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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(const uint8_t *)src, in->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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\
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for (int y = slice_start; y < slice_end; y++) { \
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for (int x = 0; x < width; x++) { \
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const float v = fmaxf(src[x], osrc[x] * decay); \
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\
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osrc[x] = v; \
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if (disabled) { \
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dst[x] = src[x]; \
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} else { \
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dst[x] = round(v); \
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} \
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} \
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\
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src += in->linesize[p] / sizeof(type); \
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osrc += width; \
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dst += out->linesize[p] / sizeof(type); \
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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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LAGFUN(8, uint8_t, lrintf, 0)
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LAGFUN(16, uint16_t, lrintf, 0)
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LAGFUN(32, float, , 0)
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LAGFUN(d8, uint8_t, lrintf, 1)
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LAGFUN(d16, uint16_t, lrintf, 1)
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LAGFUN(d32, float, , 1)
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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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LagfunContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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const AVPixFmtDescriptor *desc;
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int ret;
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desc = av_pix_fmt_desc_get(outlink->format);
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if (!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 = desc->comp[0].depth;
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s->lagfun[0] = s->depth <= 8 ? lagfun_frame8 : s->depth <= 16 ? lagfun_frame16 : lagfun_frame32;
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s->lagfun[1] = s->depth <= 8 ? lagfun_framed8 : s->depth <= 16 ? lagfun_framed16 : lagfun_framed32;
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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->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
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s->planewidth[0] = s->planewidth[3] = inlink->w;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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for (int p = 0; p < s->nb_planes; p++) {
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s->old[p] = av_calloc(s->planewidth[p] * s->planeheight[p], sizeof(*s->old[0]));
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if (!s->old[p])
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return AVERROR(ENOMEM);
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}
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return 0;
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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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LagfunContext *s = ctx->priv;
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ThreadData td;
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AVFrame *out;
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, in);
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td.out = out;
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td.in = in;
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ff_filter_execute(ctx, s->lagfun[!!ctx->is_disabled], &td, NULL,
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FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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LagfunContext *s = ctx->priv;
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for (int p = 0; p < s->nb_planes; p++)
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av_freep(&s->old[p]);
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}
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#define OFFSET(x) offsetof(LagfunContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption lagfun_options[] = {
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{ "decay", "set decay", OFFSET(decay), AV_OPT_TYPE_FLOAT, {.dbl=.95}, 0, 1, FLAGS },
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{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
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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(lagfun);
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const AVFilter ff_vf_lagfun = {
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.name = "lagfun",
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.description = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
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.priv_size = sizeof(LagfunContext),
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.priv_class = &lagfun_class,
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.uninit = uninit,
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FILTER_OUTPUTS(outputs),
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FILTER_INPUTS(inputs),
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FILTER_PIXFMTS_ARRAY(pixel_fmts),
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.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
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.process_command = ff_filter_process_command,
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};
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