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@ -0,0 +1,401 @@
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/*
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* Copyright (c) 2021 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/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "framesync.h"
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#include "internal.h"
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#include "video.h"
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typedef struct VarBlurContext {
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const AVClass *class;
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FFFrameSync fs;
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int min_radius;
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int max_radius;
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int planes;
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int depth;
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int planewidth[4];
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int planeheight[4];
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AVFrame *sat;
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int nb_planes;
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void (*compute_sat)(const uint8_t *ssrc,
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int linesize,
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int w, int h,
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const uint8_t *dstp,
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int dst_linesize);
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int (*blur_plane)(AVFilterContext *ctx,
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uint8_t *ddst,
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int ddst_linesize,
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const uint8_t *rrptr,
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int rrptr_linesize,
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int w, int h,
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const uint8_t *pptr,
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int pptr_linesize,
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int slice_start, int slice_end);
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} VarBlurContext;
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#define OFFSET(x) offsetof(VarBlurContext, 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 varblur_options[] = {
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{ "min_r", "set min blur radius", OFFSET(min_radius), AV_OPT_TYPE_INT, {.i64=0}, 0, 254, FLAGS },
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{ "max_r", "set max blur radius", OFFSET(max_radius), AV_OPT_TYPE_INT, {.i64=8}, 1, 255, FLAGS },
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{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
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{ NULL }
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};
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FRAMESYNC_DEFINE_CLASS(varblur, VarBlurContext, fs);
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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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#define COMPUTE_SAT(type, stype, depth) \
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static void compute_sat##depth(const uint8_t *ssrc, \
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int linesize, \
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int w, int h, \
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const uint8_t *dstp, \
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int dst_linesize) \
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{ \
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const type *src = (const type *)ssrc; \
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stype *dst = (stype *)dstp; \
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\
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linesize /= (depth / 8); \
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dst_linesize /= (depth / 2); \
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dst += dst_linesize; \
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\
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for (int y = 0; y < h; y++) { \
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stype sum = 0; \
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\
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for (int x = 1; x < w; x++) { \
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sum += src[x - 1]; \
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dst[x] = sum + dst[x - dst_linesize]; \
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} \
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\
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src += linesize; \
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dst += dst_linesize; \
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} \
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}
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COMPUTE_SAT(uint8_t, uint32_t, 8)
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COMPUTE_SAT(uint16_t, uint64_t, 16)
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typedef struct ThreadData {
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AVFrame *in, *out, *radius;
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} ThreadData;
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static float lerpf(float v0, float v1, float f)
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{
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return v0 + (v1 - v0) * f;
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}
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#define BLUR_PLANE(type, stype, bits) \
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static int blur_plane##bits(AVFilterContext *ctx, \
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uint8_t *ddst, \
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int ddst_linesize, \
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const uint8_t *rrptr, \
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int rrptr_linesize, \
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int w, int h, \
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const uint8_t *pptr, \
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int pptr_linesize, \
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int slice_start, int slice_end) \
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{ \
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VarBlurContext *s = ctx->priv; \
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const int ddepth = s->depth; \
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const int dst_linesize = ddst_linesize / (bits / 8); \
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const int ptr_linesize = pptr_linesize / (bits / 2); \
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const int rptr_linesize = rrptr_linesize / (bits / 8); \
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const type *rptr = (const type *)rrptr + slice_start * rptr_linesize; \
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type *dst = (type *)ddst + slice_start * dst_linesize; \
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const stype *ptr = (stype *)pptr; \
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const float minr = 2.f * s->min_radius + 1.f; \
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const float maxr = 2.f * s->max_radius + 1.f; \
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const float scaler = (maxr - minr) / ((1 << ddepth) - 1); \
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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 < w; x++) { \
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const float radiusf = minr + (FFMAX(0.f, 2 * rptr[x] + 1 - minr)) * scaler; \
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const int radius = floorf(radiusf); \
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const float factor = radiusf - radius; \
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const int nradius = radius + 1; \
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const int l = FFMIN(radius, x); \
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const int r = FFMIN(radius, w - x - 1); \
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const int t = FFMIN(radius, y); \
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const int b = FFMIN(radius, h - y - 1); \
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const int nl = FFMIN(nradius, x); \
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const int nr = FFMIN(nradius, w - x - 1); \
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const int nt = FFMIN(nradius, y); \
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const int nb = FFMIN(nradius, h - y - 1); \
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stype tl = ptr[(y - t) * ptr_linesize + x - l]; \
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stype tr = ptr[(y - t) * ptr_linesize + x + r]; \
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stype bl = ptr[(y + b) * ptr_linesize + x - l]; \
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stype br = ptr[(y + b) * ptr_linesize + x + r]; \
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stype ntl = ptr[(y - nt) * ptr_linesize + x - nl]; \
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stype ntr = ptr[(y - nt) * ptr_linesize + x + nr]; \
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stype nbl = ptr[(y + nb) * ptr_linesize + x - nl]; \
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stype nbr = ptr[(y + nb) * ptr_linesize + x + nr]; \
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stype div = (l + r) * (t + b); \
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stype ndiv = (nl + nr) * (nt + nb); \
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stype p0 = (br + tl - bl - tr) / div; \
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stype n0 = (nbr + ntl - nbl - ntr) / ndiv; \
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\
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dst[x] = av_clip_uintp2_c(lrintf( \
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lerpf(p0, n0, factor)), \
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ddepth); \
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} \
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\
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rptr += rptr_linesize; \
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dst += dst_linesize; \
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} \
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\
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return 0; \
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}
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BLUR_PLANE(uint8_t, uint32_t, 8)
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BLUR_PLANE(uint16_t, uint64_t, 16)
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static int blur_planes(AVFilterContext *ctx, void *arg,
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int jobnr, int nb_jobs)
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{
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VarBlurContext *s = ctx->priv;
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ThreadData *td = arg;
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AVFrame *radius = td->radius;
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AVFrame *out = td->out;
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AVFrame *in = td->in;
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for (int plane = 0; plane < s->nb_planes; plane++) {
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const int height = s->planeheight[plane];
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr+1)) / nb_jobs;
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const int width = s->planewidth[plane];
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const int linesize = in->linesize[plane];
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const int dst_linesize = out->linesize[plane];
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const uint8_t *rptr = radius->data[plane];
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const int rptr_linesize = radius->linesize[plane];
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uint8_t *ptr = s->sat->data[plane];
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const int ptr_linesize = s->sat->linesize[plane];
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const uint8_t *src = in->data[plane];
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uint8_t *dst = out->data[plane];
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if (!(s->planes & (1 << plane))) {
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if (out != in)
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av_image_copy_plane(dst + slice_start * dst_linesize,
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dst_linesize,
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src + slice_start * linesize,
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linesize,
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width * ((s->depth + 7) / 8),
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slice_end - slice_start);
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continue;
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}
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s->blur_plane(ctx, dst, dst_linesize,
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rptr, rptr_linesize,
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width, height,
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ptr, ptr_linesize,
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slice_start, slice_end);
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}
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return 0;
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}
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static int blur_frame(AVFilterContext *ctx, AVFrame *in, AVFrame *radius)
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{
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VarBlurContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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ThreadData td;
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AVFrame *out;
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if (av_frame_is_writable(in)) {
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out = in;
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} else {
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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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}
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for (int plane = 0; plane < s->nb_planes; plane++) {
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const int height = s->planeheight[plane];
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const int width = s->planewidth[plane];
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const int linesize = in->linesize[plane];
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uint8_t *ptr = s->sat->data[plane];
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const int ptr_linesize = s->sat->linesize[plane];
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const uint8_t *src = in->data[plane];
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if (!(s->planes & (1 << plane)))
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continue;
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s->compute_sat(src, linesize, width, height, ptr, ptr_linesize);
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}
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td.in = in;
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td.out = out;
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td.radius = radius;
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ff_filter_execute(ctx, blur_planes, &td, NULL,
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FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
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if (out != in)
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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 int activate(AVFilterContext *ctx)
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{
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VarBlurContext *s = ctx->priv;
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return ff_framesync_activate(&s->fs);
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}
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static int varblur_frame(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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VarBlurContext *s = ctx->priv;
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AVFrame *in, *radius;
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int ret;
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if (s->max_radius <= s->min_radius)
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s->max_radius = s->min_radius + 1;
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ret = ff_framesync_dualinput_get(fs, &in, &radius);
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if (ret < 0)
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return ret;
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if (!radius)
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return ff_filter_frame(ctx->outputs[0], in);
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return blur_frame(ctx, in, radius);
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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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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *radiuslink = ctx->inputs[1];
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VarBlurContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
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int ret;
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if (inlink->w != radiuslink->w || inlink->h != radiuslink->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 (size %dx%d)\n",
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ctx->input_pads[0].name, inlink->w, inlink->h,
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ctx->input_pads[1].name, radiuslink->w, radiuslink->h);
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return AVERROR(EINVAL);
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}
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outlink->w = inlink->w;
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outlink->h = inlink->h;
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outlink->time_base = inlink->time_base;
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outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
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outlink->frame_rate = inlink->frame_rate;
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s->depth = desc->comp[0].depth;
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s->blur_plane = s->depth <= 8 ? blur_plane8 : blur_plane16;
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s->compute_sat = s->depth <= 8 ? compute_sat8 : compute_sat16;
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(outlink->w, desc->log2_chroma_w);
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s->planewidth[0] = s->planewidth[3] = outlink->w;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(outlink->h, desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = outlink->h;
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s->nb_planes = av_pix_fmt_count_planes(outlink->format);
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s->sat = ff_get_video_buffer(outlink, (outlink->w + 1) * 4 * ((s->depth + 7) / 8), outlink->h + 1);
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if (!s->sat)
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return AVERROR(ENOMEM);
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s->fs.on_event = varblur_frame;
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if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
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return ret;
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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 av_cold void uninit(AVFilterContext *ctx)
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{
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VarBlurContext *s = ctx->priv;
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ff_framesync_uninit(&s->fs);
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av_frame_free(&s->sat);
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}
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static const AVFilterPad varblur_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{
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.name = "radius",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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};
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static const AVFilterPad varblur_outputs[] = {
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|
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{
|
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|
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.name = "default",
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|
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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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|
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};
|
|
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|
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const AVFilter ff_vf_varblur = {
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|
|
.name = "varblur",
|
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|
|
.description = NULL_IF_CONFIG_SMALL("Apply Variable Blur filter."),
|
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|
|
.priv_size = sizeof(VarBlurContext),
|
|
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|
|
.priv_class = &varblur_class,
|
|
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|
|
.activate = activate,
|
|
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|
|
.preinit = varblur_framesync_preinit,
|
|
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|
|
.uninit = uninit,
|
|
|
|
|
FILTER_INPUTS(varblur_inputs),
|
|
|
|
|
FILTER_OUTPUTS(varblur_outputs),
|
|
|
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
|
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
|
|
|
|
|
AVFILTER_FLAG_SLICE_THREADS,
|
|
|
|
|
.process_command = ff_filter_process_command,
|
|
|
|
|
};
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Paul B Mahol