| /* |
| * Copyright (c) 2017 Ming Yang |
| * Copyright (c) 2019 Paul B Mahol |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include "libavutil/imgutils.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| typedef struct BilateralContext { |
| const AVClass *class; |
| |
| float sigmaS; |
| float sigmaR; |
| int planes; |
| |
| int nb_planes; |
| int depth; |
| int planewidth[4]; |
| int planeheight[4]; |
| |
| float range_table[65536]; |
| |
| float *img_out_f; |
| float *img_temp; |
| float *map_factor_a; |
| float *map_factor_b; |
| float *slice_factor_a; |
| float *slice_factor_b; |
| float *line_factor_a; |
| float *line_factor_b; |
| } BilateralContext; |
| |
| #define OFFSET(x) offsetof(BilateralContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| |
| static const AVOption bilateral_options[] = { |
| { "sigmaS", "set spatial sigma", OFFSET(sigmaS), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0, 10, FLAGS }, |
| { "sigmaR", "set range sigma", OFFSET(sigmaR), AV_OPT_TYPE_FLOAT, {.dbl=0.1}, 0.0, 1, FLAGS }, |
| { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 0xF, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(bilateral); |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
| AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
| AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, |
| AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, |
| AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
| AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
| AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
| AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
| AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
| AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
| AV_PIX_FMT_NONE |
| }; |
| |
| return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| BilateralContext *s = inlink->dst->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| float inv_sigma_range; |
| |
| s->depth = desc->comp[0].depth; |
| inv_sigma_range = 1.0f / (s->sigmaR * ((1 << s->depth) - 1)); |
| |
| //compute a lookup table |
| for (int i = 0; i < (1 << s->depth); i++) |
| s->range_table[i] = expf(-i * inv_sigma_range); |
| |
| s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); |
| s->planewidth[0] = s->planewidth[3] = inlink->w; |
| s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
| s->planeheight[0] = s->planeheight[3] = inlink->h; |
| |
| s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
| |
| s->img_out_f = av_calloc(inlink->w * inlink->h, sizeof(float)); |
| s->img_temp = av_calloc(inlink->w * inlink->h, sizeof(float)); |
| s->map_factor_a = av_calloc(inlink->w * inlink->h, sizeof(float)); |
| s->map_factor_b = av_calloc(inlink->w * inlink->h, sizeof(float)); |
| s->slice_factor_a = av_calloc(inlink->w, sizeof(float)); |
| s->slice_factor_b = av_calloc(inlink->w, sizeof(float)); |
| s->line_factor_a = av_calloc(inlink->w, sizeof(float)); |
| s->line_factor_b = av_calloc(inlink->w, sizeof(float)); |
| |
| if (!s->img_out_f || |
| !s->img_temp || |
| !s->map_factor_a || |
| !s->map_factor_b || |
| !s->slice_factor_a || |
| !s->slice_factor_a || |
| !s->line_factor_a || |
| !s->line_factor_a) |
| return AVERROR(ENOMEM); |
| |
| return 0; |
| } |
| |
| #define BILATERAL(type, name) \ |
| static void bilateral_##name(BilateralContext *s, const uint8_t *ssrc, uint8_t *ddst, \ |
| float sigma_spatial, float sigma_range, \ |
| int width, int height, int src_linesize, int dst_linesize) \ |
| { \ |
| type *dst = (type *)ddst; \ |
| const type *src = (const type *)ssrc; \ |
| float *img_out_f = s->img_out_f, *img_temp = s->img_temp; \ |
| float *map_factor_a = s->map_factor_a, *map_factor_b = s->map_factor_b; \ |
| float *slice_factor_a = s->slice_factor_a, *slice_factor_b = s->slice_factor_b; \ |
| float *line_factor_a = s->line_factor_a, *line_factor_b = s->line_factor_b; \ |
| float *range_table = s->range_table; \ |
| float alpha = expf(-sqrtf(2.f) / (sigma_spatial * width)); \ |
| float ypr, ycr, *ycy, *ypy, *xcy, fp, fc; \ |
| float inv_alpha_ = 1 - alpha; \ |
| float *ycf, *ypf, *xcf, *in_factor; \ |
| const type *tcy, *tpy; \ |
| int h1; \ |
| \ |
| for (int y = 0; y < height; y++) { \ |
| float *temp_factor_x, *temp_x = &img_temp[y * width]; \ |
| const type *in_x = &src[y * src_linesize]; \ |
| const type *texture_x = &src[y * src_linesize]; \ |
| type tpr; \ |
| \ |
| *temp_x++ = ypr = *in_x++; \ |
| tpr = *texture_x++; \ |
| \ |
| temp_factor_x = &map_factor_a[y * width]; \ |
| *temp_factor_x++ = fp = 1; \ |
| \ |
| for (int x = 1; x < width; x++) { \ |
| float weight, alpha_; \ |
| int range_dist; \ |
| type tcr = *texture_x++; \ |
| type dr = abs(tcr - tpr); \ |
| \ |
| range_dist = dr; \ |
| weight = range_table[range_dist]; \ |
| alpha_ = weight*alpha; \ |
| *temp_x++ = ycr = inv_alpha_*(*in_x++) + alpha_*ypr; \ |
| tpr = tcr; \ |
| ypr = ycr; \ |
| *temp_factor_x++ = fc = inv_alpha_ + alpha_ * fp; \ |
| fp = fc; \ |
| } \ |
| --temp_x; *temp_x = 0.5f*((*temp_x) + (*--in_x)); \ |
| tpr = *--texture_x; \ |
| ypr = *in_x; \ |
| \ |
| --temp_factor_x; *temp_factor_x = 0.5f*((*temp_factor_x) + 1); \ |
| fp = 1; \ |
| \ |
| for (int x = width - 2; x >= 0; x--) { \ |
| type tcr = *--texture_x; \ |
| type dr = abs(tcr - tpr); \ |
| int range_dist = dr; \ |
| float weight = range_table[range_dist]; \ |
| float alpha_ = weight * alpha; \ |
| \ |
| ycr = inv_alpha_ * (*--in_x) + alpha_ * ypr; \ |
| --temp_x; *temp_x = 0.5f*((*temp_x) + ycr); \ |
| tpr = tcr; \ |
| ypr = ycr; \ |
| \ |
| fc = inv_alpha_ + alpha_*fp; \ |
| --temp_factor_x; \ |
| *temp_factor_x = 0.5f*((*temp_factor_x) + fc); \ |
| fp = fc; \ |
| } \ |
| } \ |
| memcpy(img_out_f, img_temp, sizeof(float) * width); \ |
| \ |
| alpha = expf(-sqrtf(2.f) / (sigma_spatial * height)); \ |
| inv_alpha_ = 1 - alpha; \ |
| in_factor = map_factor_a; \ |
| memcpy(map_factor_b, in_factor, sizeof(float) * width); \ |
| for (int y = 1; y < height; y++) { \ |
| tpy = &src[(y - 1) * src_linesize]; \ |
| tcy = &src[y * src_linesize]; \ |
| xcy = &img_temp[y * width]; \ |
| ypy = &img_out_f[(y - 1) * width]; \ |
| ycy = &img_out_f[y * width]; \ |
| \ |
| xcf = &in_factor[y * width]; \ |
| ypf = &map_factor_b[(y - 1) * width]; \ |
| ycf = &map_factor_b[y * width]; \ |
| for (int x = 0; x < width; x++) { \ |
| type dr = abs((*tcy++) - (*tpy++)); \ |
| int range_dist = dr; \ |
| float weight = range_table[range_dist]; \ |
| float alpha_ = weight*alpha; \ |
| \ |
| *ycy++ = inv_alpha_*(*xcy++) + alpha_*(*ypy++); \ |
| *ycf++ = inv_alpha_*(*xcf++) + alpha_*(*ypf++); \ |
| } \ |
| } \ |
| h1 = height - 1; \ |
| ycf = line_factor_a; \ |
| ypf = line_factor_b; \ |
| memcpy(ypf, &in_factor[h1 * width], sizeof(float) * width); \ |
| for (int x = 0; x < width; x++) \ |
| map_factor_b[h1 * width + x] = 0.5f*(map_factor_b[h1 * width + x] + ypf[x]); \ |
| \ |
| ycy = slice_factor_a; \ |
| ypy = slice_factor_b; \ |
| memcpy(ypy, &img_temp[h1 * width], sizeof(float) * width); \ |
| for (int x = 0, k = 0; x < width; x++) { \ |
| int idx = h1 * width + x; \ |
| img_out_f[idx] = 0.5f*(img_out_f[idx] + ypy[k++]) / map_factor_b[h1 * width + x]; \ |
| } \ |
| \ |
| for (int y = h1 - 1; y >= 0; y--) { \ |
| float *ycf_, *ypf_, *factor_; \ |
| float *ycy_, *ypy_, *out_; \ |
| \ |
| tpy = &src[(y + 1) * src_linesize]; \ |
| tcy = &src[y * src_linesize]; \ |
| xcy = &img_temp[y * width]; \ |
| ycy_ = ycy; \ |
| ypy_ = ypy; \ |
| out_ = &img_out_f[y * width]; \ |
| \ |
| xcf = &in_factor[y * width]; \ |
| ycf_ = ycf; \ |
| ypf_ = ypf; \ |
| factor_ = &map_factor_b[y * width]; \ |
| for (int x = 0; x < width; x++) { \ |
| type dr = abs((*tcy++) - (*tpy++)); \ |
| int range_dist = dr; \ |
| float weight = range_table[range_dist]; \ |
| float alpha_ = weight*alpha; \ |
| float ycc, fcc = inv_alpha_*(*xcf++) + alpha_*(*ypf_++); \ |
| \ |
| *ycf_++ = fcc; \ |
| *factor_ = 0.5f * (*factor_ + fcc); \ |
| \ |
| ycc = inv_alpha_*(*xcy++) + alpha_*(*ypy_++); \ |
| *ycy_++ = ycc; \ |
| *out_ = 0.5f * (*out_ + ycc) / (*factor_); \ |
| out_++; \ |
| factor_++; \ |
| } \ |
| \ |
| memcpy(ypy, ycy, sizeof(float) * width); \ |
| memcpy(ypf, ycf, sizeof(float) * width); \ |
| } \ |
| \ |
| for (int i = 0; i < height; i++) \ |
| for (int j = 0; j < width; j++) \ |
| dst[j + i * dst_linesize] = img_out_f[i * width + j]; \ |
| } |
| |
| BILATERAL(uint8_t, byte) |
| BILATERAL(uint16_t, word) |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| BilateralContext *s = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFrame *out; |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(out, in); |
| |
| 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, |
| }; |
