371 lines
21 KiB
C
371 lines
21 KiB
C
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/*
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* Copyright (c) 2017 Ming Yang
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* Copyright (c) 2019 Paul B Mahol
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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 "internal.h"
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#include "video.h"
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typedef struct BilateralContext {
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const AVClass *class;
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float sigmaS;
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float sigmaR;
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int planes;
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int nb_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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float range_table[65536];
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float *img_out_f;
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float *img_temp;
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float *map_factor_a;
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float *map_factor_b;
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float *slice_factor_a;
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float *slice_factor_b;
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float *line_factor_a;
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float *line_factor_b;
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} BilateralContext;
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#define OFFSET(x) offsetof(BilateralContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption bilateral_options[] = {
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{ "sigmaS", "set spatial sigma", OFFSET(sigmaS), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0, 10, FLAGS },
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{ "sigmaR", "set range sigma", OFFSET(sigmaR), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0, 1, FLAGS },
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{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 0xF, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(bilateral);
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static int query_formats(AVFilterContext *ctx)
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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_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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return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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}
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static int config_input(AVFilterLink *inlink)
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{
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BilateralContext *s = inlink->dst->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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float inv_sigma_range;
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s->depth = desc->comp[0].depth;
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inv_sigma_range = 1.0f / (s->sigmaR * ((1 << s->depth) - 1));
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//compute a lookup table
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for (int i = 0; i < (1 << s->depth); i++)
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s->range_table[i] = expf(-i * inv_sigma_range);
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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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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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s->img_out_f = av_calloc(inlink->w * inlink->h, sizeof(float));
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s->img_temp = av_calloc(inlink->w * inlink->h, sizeof(float));
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s->map_factor_a = av_calloc(inlink->w * inlink->h, sizeof(float));
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s->map_factor_b = av_calloc(inlink->w * inlink->h, sizeof(float));
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s->slice_factor_a = av_calloc(inlink->w, sizeof(float));
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s->slice_factor_b = av_calloc(inlink->w, sizeof(float));
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s->line_factor_a = av_calloc(inlink->w, sizeof(float));
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s->line_factor_b = av_calloc(inlink->w, sizeof(float));
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if (!s->img_out_f ||
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!s->img_temp ||
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!s->map_factor_a ||
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!s->map_factor_b ||
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!s->slice_factor_a ||
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!s->slice_factor_a ||
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!s->line_factor_a ||
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!s->line_factor_a)
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return AVERROR(ENOMEM);
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return 0;
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}
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#define BILATERAL(type, name) \
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static void bilateral_##name(BilateralContext *s, const uint8_t *ssrc, uint8_t *ddst, \
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float sigma_spatial, float sigma_range, \
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int width, int height, int src_linesize, int dst_linesize) \
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{ \
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type *dst = (type *)ddst; \
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const type *src = (const type *)ssrc; \
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float *img_out_f = s->img_out_f, *img_temp = s->img_temp; \
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float *map_factor_a = s->map_factor_a, *map_factor_b = s->map_factor_b; \
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float *slice_factor_a = s->slice_factor_a, *slice_factor_b = s->slice_factor_b; \
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float *line_factor_a = s->line_factor_a, *line_factor_b = s->line_factor_b; \
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float *range_table = s->range_table; \
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float alpha = expf(-sqrtf(2.f) / (sigma_spatial * width)); \
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float ypr, ycr, *ycy, *ypy, *xcy, fp, fc; \
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float inv_alpha_ = 1 - alpha; \
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float *ycf, *ypf, *xcf, *in_factor; \
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const type *tcy, *tpy; \
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int h1; \
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\
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for (int y = 0; y < height; y++) { \
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float *temp_factor_x, *temp_x = &img_temp[y * width]; \
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const type *in_x = &src[y * src_linesize]; \
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const type *texture_x = &src[y * src_linesize]; \
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type tpr; \
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\
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*temp_x++ = ypr = *in_x++; \
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tpr = *texture_x++; \
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\
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temp_factor_x = &map_factor_a[y * width]; \
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*temp_factor_x++ = fp = 1; \
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\
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for (int x = 1; x < width; x++) { \
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float weight, alpha_; \
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int range_dist; \
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type tcr = *texture_x++; \
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type dr = abs(tcr - tpr); \
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\
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range_dist = dr; \
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weight = range_table[range_dist]; \
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alpha_ = weight*alpha; \
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*temp_x++ = ycr = inv_alpha_*(*in_x++) + alpha_*ypr; \
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tpr = tcr; \
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ypr = ycr; \
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*temp_factor_x++ = fc = inv_alpha_ + alpha_ * fp; \
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fp = fc; \
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} \
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--temp_x; *temp_x = 0.5f*((*temp_x) + (*--in_x)); \
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tpr = *--texture_x; \
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ypr = *in_x; \
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\
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--temp_factor_x; *temp_factor_x = 0.5f*((*temp_factor_x) + 1); \
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fp = 1; \
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\
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for (int x = width - 2; x >= 0; x--) { \
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type tcr = *--texture_x; \
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type dr = abs(tcr - tpr); \
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int range_dist = dr; \
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float weight = range_table[range_dist]; \
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float alpha_ = weight * alpha; \
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\
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ycr = inv_alpha_ * (*--in_x) + alpha_ * ypr; \
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--temp_x; *temp_x = 0.5f*((*temp_x) + ycr); \
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tpr = tcr; \
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ypr = ycr; \
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\
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fc = inv_alpha_ + alpha_*fp; \
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--temp_factor_x; \
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*temp_factor_x = 0.5f*((*temp_factor_x) + fc); \
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fp = fc; \
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} \
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} \
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memcpy(img_out_f, img_temp, sizeof(float) * width); \
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\
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alpha = expf(-sqrtf(2.f) / (sigma_spatial * height)); \
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inv_alpha_ = 1 - alpha; \
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in_factor = map_factor_a; \
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memcpy(map_factor_b, in_factor, sizeof(float) * width); \
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for (int y = 1; y < height; y++) { \
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tpy = &src[(y - 1) * src_linesize]; \
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tcy = &src[y * src_linesize]; \
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xcy = &img_temp[y * width]; \
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ypy = &img_out_f[(y - 1) * width]; \
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ycy = &img_out_f[y * width]; \
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\
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xcf = &in_factor[y * width]; \
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ypf = &map_factor_b[(y - 1) * width]; \
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ycf = &map_factor_b[y * width]; \
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for (int x = 0; x < width; x++) { \
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type dr = abs((*tcy++) - (*tpy++)); \
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int range_dist = dr; \
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float weight = range_table[range_dist]; \
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float alpha_ = weight*alpha; \
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\
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*ycy++ = inv_alpha_*(*xcy++) + alpha_*(*ypy++); \
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*ycf++ = inv_alpha_*(*xcf++) + alpha_*(*ypf++); \
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} \
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} \
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h1 = height - 1; \
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ycf = line_factor_a; \
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ypf = line_factor_b; \
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memcpy(ypf, &in_factor[h1 * width], sizeof(float) * width); \
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for (int x = 0; x < width; x++) \
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map_factor_b[h1 * width + x] = 0.5f*(map_factor_b[h1 * width + x] + ypf[x]); \
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\
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ycy = slice_factor_a; \
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ypy = slice_factor_b; \
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memcpy(ypy, &img_temp[h1 * width], sizeof(float) * width); \
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for (int x = 0, k = 0; x < width; x++) { \
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int idx = h1 * width + x; \
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img_out_f[idx] = 0.5f*(img_out_f[idx] + ypy[k++]) / map_factor_b[h1 * width + x]; \
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} \
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\
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for (int y = h1 - 1; y >= 0; y--) { \
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float *ycf_, *ypf_, *factor_; \
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float *ycy_, *ypy_, *out_; \
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\
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tpy = &src[(y + 1) * src_linesize]; \
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tcy = &src[y * src_linesize]; \
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xcy = &img_temp[y * width]; \
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ycy_ = ycy; \
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ypy_ = ypy; \
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out_ = &img_out_f[y * width]; \
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\
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xcf = &in_factor[y * width]; \
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ycf_ = ycf; \
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ypf_ = ypf; \
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factor_ = &map_factor_b[y * width]; \
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for (int x = 0; x < width; x++) { \
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type dr = abs((*tcy++) - (*tpy++)); \
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int range_dist = dr; \
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float weight = range_table[range_dist]; \
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float alpha_ = weight*alpha; \
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float ycc, fcc = inv_alpha_*(*xcf++) + alpha_*(*ypf_++); \
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\
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*ycf_++ = fcc; \
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*factor_ = 0.5f * (*factor_ + fcc); \
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\
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ycc = inv_alpha_*(*xcy++) + alpha_*(*ypy_++); \
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*ycy_++ = ycc; \
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*out_ = 0.5f * (*out_ + ycc) / (*factor_); \
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out_++; \
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factor_++; \
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} \
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\
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memcpy(ypy, ycy, sizeof(float) * width); \
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memcpy(ypf, ycf, sizeof(float) * width); \
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} \
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\
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for (int i = 0; i < height; i++) \
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for (int j = 0; j < width; j++) \
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dst[j + i * dst_linesize] = img_out_f[i * width + j]; \
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}
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BILATERAL(uint8_t, byte)
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BILATERAL(uint16_t, word)
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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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BilateralContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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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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}
|
||
|
|
av_frame_copy_props(out, in);
|
||
|
|
|
||
|
|
for (int plane = 0; plane < s->nb_planes; plane++) {
|
||
|
|
if (!(s->planes & (1 << plane))) {
|
||
|
|
av_image_copy_plane(out->data[plane], out->linesize[plane],
|
||
|
|
in->data[plane], in->linesize[plane],
|
||
|
|
s->planewidth[plane] * ((s->depth + 7) / 8), s->planeheight[plane]);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (s->depth <= 8)
|
||
|
|
bilateral_byte(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
|
||
|
|
s->planewidth[plane], s->planeheight[plane],
|
||
|
|
in->linesize[plane], out->linesize[plane]);
|
||
|
|
else
|
||
|
|
bilateral_word(s, in->data[plane], out->data[plane], s->sigmaS, s->sigmaR,
|
||
|
|
s->planewidth[plane], s->planeheight[plane],
|
||
|
|
in->linesize[plane] / 2, out->linesize[plane] / 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
av_frame_free(&in);
|
||
|
|
return ff_filter_frame(outlink, out);
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
||
|
|
{
|
||
|
|
BilateralContext *s = ctx->priv;
|
||
|
|
|
||
|
|
av_freep(&s->img_out_f);
|
||
|
|
av_freep(&s->img_temp);
|
||
|
|
av_freep(&s->map_factor_a);
|
||
|
|
av_freep(&s->map_factor_b);
|
||
|
|
av_freep(&s->slice_factor_a);
|
||
|
|
av_freep(&s->slice_factor_b);
|
||
|
|
av_freep(&s->line_factor_a);
|
||
|
|
av_freep(&s->line_factor_b);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const AVFilterPad bilateral_inputs[] = {
|
||
|
|
{
|
||
|
|
.name = "default",
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.config_props = config_input,
|
||
|
|
.filter_frame = filter_frame,
|
||
|
|
},
|
||
|
|
{ NULL }
|
||
|
|
};
|
||
|
|
|
||
|
|
static const AVFilterPad bilateral_outputs[] = {
|
||
|
|
{
|
||
|
|
.name = "default",
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
},
|
||
|
|
{ NULL }
|
||
|
|
};
|
||
|
|
|
||
|
|
AVFilter ff_vf_bilateral = {
|
||
|
|
.name = "bilateral",
|
||
|
|
.description = NULL_IF_CONFIG_SMALL("Apply Bilateral filter."),
|
||
|
|
.priv_size = sizeof(BilateralContext),
|
||
|
|
.priv_class = &bilateral_class,
|
||
|
|
.uninit = uninit,
|
||
|
|
.query_formats = query_formats,
|
||
|
|
.inputs = bilateral_inputs,
|
||
|
|
.outputs = bilateral_outputs,
|
||
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
|
||
|
|
};
|