289 lines
9.5 KiB
C
289 lines
9.5 KiB
C
/*
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* Copyright (c) 2020 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/pixdesc.h"
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#include "libavutil/opt.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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#include "framesync.h"
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typedef struct MaskedThresholdContext {
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const AVClass *class;
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int threshold;
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int planes;
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int linesize[4];
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int planewidth[4], planeheight[4];
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int nb_planes;
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int depth;
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FFFrameSync fs;
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void (*maskedthreshold)(const uint8_t *src, const uint8_t *ref, uint8_t *dst, int threshold, int w);
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} MaskedThresholdContext;
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#define OFFSET(x) offsetof(MaskedThresholdContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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typedef struct ThreadData {
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AVFrame *src, *ref, *dst;
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} ThreadData;
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static const AVOption maskedthreshold_options[] = {
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{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=1}, 0, UINT16_MAX, FLAGS },
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{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
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{ NULL }
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};
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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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_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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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_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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static void threshold8(const uint8_t *src, const uint8_t *ref, uint8_t *dst, int threshold, int w)
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{
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for (int x = 0; x < w; x++)
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dst[x] = FFABS(src[x] - ref[x]) <= threshold ? src[x] : ref[x];
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}
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static void threshold16(const uint8_t *ssrc, const uint8_t *rref, uint8_t *ddst, int threshold, int w)
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{
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const uint16_t *src = (const uint16_t *)ssrc;
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const uint16_t *ref = (const uint16_t *)rref;
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uint16_t *dst = (uint16_t *)ddst;
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for (int x = 0; x < w; x++)
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dst[x] = FFABS(src[x] - ref[x]) <= threshold ? src[x] : ref[x];
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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MaskedThresholdContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int vsub, hsub, ret;
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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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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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hsub = desc->log2_chroma_w;
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vsub = desc->log2_chroma_h;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
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s->planewidth[0] = s->planewidth[3] = inlink->w;
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s->depth = desc->comp[0].depth;
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if (desc->comp[0].depth == 8)
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s->maskedthreshold = threshold8;
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else
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s->maskedthreshold = threshold16;
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return 0;
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}
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static int threshold_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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MaskedThresholdContext *s = ctx->priv;
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const int threshold = s->threshold;
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ThreadData *td = arg;
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for (int p = 0; p < s->nb_planes; p++) {
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const ptrdiff_t src_linesize = td->src->linesize[p];
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const ptrdiff_t ref_linesize = td->ref->linesize[p];
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const ptrdiff_t dst_linesize = td->dst->linesize[p];
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const int w = s->planewidth[p];
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const int h = s->planeheight[p];
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const int slice_start = (h * jobnr) / nb_jobs;
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const int slice_end = (h * (jobnr+1)) / nb_jobs;
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const uint8_t *src = td->src->data[p] + slice_start * src_linesize;
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const uint8_t *ref = td->ref->data[p] + slice_start * ref_linesize;
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uint8_t *dst = td->dst->data[p] + slice_start * dst_linesize;
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if (!((1 << p) & s->planes)) {
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av_image_copy_plane(dst, dst_linesize, ref, ref_linesize,
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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 (int y = slice_start; y < slice_end; y++) {
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s->maskedthreshold(src, ref, dst, threshold, w);
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dst += dst_linesize;
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src += src_linesize;
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ref += ref_linesize;
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}
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}
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return 0;
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}
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static int process_frame(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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MaskedThresholdContext *s = fs->opaque;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out, *src, *ref;
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int ret;
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if ((ret = ff_framesync_get_frame(&s->fs, 0, &src, 0)) < 0 ||
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(ret = ff_framesync_get_frame(&s->fs, 1, &ref, 0)) < 0)
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return ret;
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if (ctx->is_disabled) {
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out = av_frame_clone(src);
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if (!out)
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return AVERROR(ENOMEM);
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} else {
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ThreadData td;
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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, src);
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td.src = src;
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td.ref = ref;
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td.dst = out;
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ff_filter_execute(ctx, threshold_slice, &td, NULL,
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FFMIN(s->planeheight[2], ff_filter_get_nb_threads(ctx)));
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}
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out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
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return ff_filter_frame(outlink, out);
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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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MaskedThresholdContext *s = ctx->priv;
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AVFilterLink *source = ctx->inputs[0];
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AVFilterLink *ref = ctx->inputs[1];
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FFFrameSyncIn *in;
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int ret;
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if (source->w != ref->w || source->h != ref->h) {
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av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
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"(size %dx%d) do not match the corresponding "
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"second input link %s parameters (%dx%d)\n",
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ctx->input_pads[0].name, source->w, source->h,
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ctx->input_pads[1].name, ref->w, ref->h);
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return AVERROR(EINVAL);
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}
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outlink->w = source->w;
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outlink->h = source->h;
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outlink->sample_aspect_ratio = source->sample_aspect_ratio;
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outlink->frame_rate = source->frame_rate;
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if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
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return ret;
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in = s->fs.in;
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in[0].time_base = source->time_base;
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in[1].time_base = ref->time_base;
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in[0].sync = 1;
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in[0].before = EXT_STOP;
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in[0].after = EXT_INFINITY;
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in[1].sync = 1;
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in[1].before = EXT_STOP;
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in[1].after = EXT_INFINITY;
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s->fs.opaque = s;
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s->fs.on_event = process_frame;
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ret = ff_framesync_configure(&s->fs);
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outlink->time_base = s->fs.time_base;
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return ret;
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}
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static int activate(AVFilterContext *ctx)
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{
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MaskedThresholdContext *s = ctx->priv;
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return ff_framesync_activate(&s->fs);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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MaskedThresholdContext *s = ctx->priv;
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ff_framesync_uninit(&s->fs);
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}
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static const AVFilterPad maskedthreshold_inputs[] = {
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{
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.name = "source",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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},
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{
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.name = "reference",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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};
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static const AVFilterPad maskedthreshold_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(maskedthreshold);
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const AVFilter ff_vf_maskedthreshold = {
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.name = "maskedthreshold",
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.description = NULL_IF_CONFIG_SMALL("Pick pixels comparing absolute difference of two streams with threshold."),
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.priv_class = &maskedthreshold_class,
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.priv_size = sizeof(MaskedThresholdContext),
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.uninit = uninit,
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.activate = activate,
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FILTER_INPUTS(maskedthreshold_inputs),
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FILTER_OUTPUTS(maskedthreshold_outputs),
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FILTER_PIXFMTS_ARRAY(pix_fmts),
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = ff_filter_process_command,
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};
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