From 72b6c8c99f4b3bcdeb4f3fb594c0802ac3bf10f8 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Mon, 10 Feb 2020 18:10:55 +0100 Subject: [PATCH] avfilter: add Contrast Adaptive Sharpen video filter --- Changelog | 1 + doc/filters.texi | 15 ++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/version.h | 2 +- libavfilter/vf_cas.c | 299 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 318 insertions(+), 1 deletion(-) create mode 100644 libavfilter/vf_cas.c diff --git a/Changelog b/Changelog index e8ba02cb02..cb310a3abc 100644 --- a/Changelog +++ b/Changelog @@ -42,6 +42,7 @@ version : - siren audio decoder - Rayman 2 ADPCM decoder - Rayman 2 APM demuxer +- cas video filter version 4.2: diff --git a/doc/filters.texi b/doc/filters.texi index 70fd7a4cc7..8300aac4a3 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -6996,6 +6996,21 @@ Only deinterlace frames marked as interlaced. The default value is @code{all}. @end table +@section cas + +Apply Contrast Adaptive Sharpen filter to video stream. + +The filter accepts the following options: + +@table @option +@item strength +Set the sharpening strength. Default value is 0. + +@item planes +Set planes to filter. Default value is to filter all +planes except alpha plane. +@end table + @section chromahold Remove all color information for all colors except for certain one. diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 089880a39d..e6cfcd9487 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -177,6 +177,7 @@ OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o boxblur.o OBJS-$(CONFIG_BOXBLUR_OPENCL_FILTER) += vf_avgblur_opencl.o opencl.o \ opencl/avgblur.o boxblur.o OBJS-$(CONFIG_BWDIF_FILTER) += vf_bwdif.o yadif_common.o +OBJS-$(CONFIG_CAS_FILTER) += vf_cas.o OBJS-$(CONFIG_CHROMABER_VULKAN_FILTER) += vf_chromaber_vulkan.o vulkan.o OBJS-$(CONFIG_CHROMAHOLD_FILTER) += vf_chromakey.o OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 88ebd121ad..501e5d041b 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -168,6 +168,7 @@ extern AVFilter ff_vf_bm3d; extern AVFilter ff_vf_boxblur; extern AVFilter ff_vf_boxblur_opencl; extern AVFilter ff_vf_bwdif; +extern AVFilter ff_vf_cas; extern AVFilter ff_vf_chromahold; extern AVFilter ff_vf_chromakey; extern AVFilter ff_vf_chromashift; diff --git a/libavfilter/version.h b/libavfilter/version.h index 8916fb34f0..7b41018be7 100644 --- a/libavfilter/version.h +++ b/libavfilter/version.h @@ -30,7 +30,7 @@ #include "libavutil/version.h" #define LIBAVFILTER_VERSION_MAJOR 7 -#define LIBAVFILTER_VERSION_MINOR 76 +#define LIBAVFILTER_VERSION_MINOR 77 #define LIBAVFILTER_VERSION_MICRO 100 diff --git a/libavfilter/vf_cas.c b/libavfilter/vf_cas.c new file mode 100644 index 0000000000..a07d51a84e --- /dev/null +++ b/libavfilter/vf_cas.c @@ -0,0 +1,299 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/opt.h" +#include "libavutil/imgutils.h" +#include "avfilter.h" +#include "formats.h" +#include "internal.h" +#include "video.h" + +typedef struct CASContext { + const AVClass *class; + + float strength; + int planes; + int nb_planes; + + int depth; + int planeheight[4]; + int planewidth[4]; + + AVFrame *in; + + int (*do_slice)(AVFilterContext *s, void *arg, + int jobnr, int nb_jobs); +} CASContext; + +static inline float lerpf(float v0, float v1, float f) +{ + return v0 + (v1 - v0) * f; +} + +static int cas_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs) +{ + CASContext *s = avctx->priv; + const float strength = -lerpf(16.f, 4.01f, s->strength); + AVFrame *out = arg; + AVFrame *in = s->in; + + for (int p = 0; p < s->nb_planes; p++) { + const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; + const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; + const int linesize = out->linesize[p]; + const int in_linesize = in->linesize[p]; + const int w = s->planewidth[p]; + const int w1 = w - 1;; + const int h = s->planeheight[p]; + const int h1 = h - 1; + uint8_t *dst = out->data[p] + slice_start * linesize; + const uint8_t *src = in->data[p]; + + if (!((1 << p) & s->planes)) { + av_image_copy_plane(dst, linesize, src + slice_start * linesize, in_linesize, + w, slice_end - slice_start); + continue; + } + + for (int y = slice_start; y < slice_end; y++) { + const int y0 = FFMAX(y - 1, 0); + const int y1 = FFMIN(y + 1, h1); + for (int x = 0; x < w; x++) { + const int x0 = FFMAX(x - 1, 0); + const int x1 = FFMIN(x + 1, w1); + int a = src[y0 * in_linesize + x0]; + int b = src[y0 * in_linesize + x]; + int c = src[y0 * in_linesize + x1]; + int d = src[y * in_linesize + x0]; + int e = src[y * in_linesize + x]; + int f = src[y * in_linesize + x1]; + int g = src[y1 * in_linesize + x0]; + int h = src[y1 * in_linesize + x]; + int i = src[y1 * in_linesize + x1]; + int mn, mn2, mx, mx2; + float amp, weight; + + mn = FFMIN3(FFMIN3( d, e, f), b, h); + mn2 = FFMIN3(FFMIN3(mn, a, c), g, i); + + mn = mn + mn2; + + mx = FFMAX3(FFMAX3( d, e, f), b, h); + mx2 = FFMAX3(FFMAX3(mx, a, c), g, i); + + mx = mx + mx2; + + amp = sqrtf(av_clipf(FFMIN(mn, 511 - mx) / (float)mx, 0.f, 1.f)); + + weight = amp / strength; + + dst[x] = av_clip_uint8(((b + d + f + h) * weight + e) / (1.f + 4.f * weight)); + } + dst += linesize; + } + } + + return 0; +} + +static int cas_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs) +{ + CASContext *s = avctx->priv; + const float strength = -lerpf(16.f, 4.01f, s->strength); + const int max = 2 * (1 << s->depth) - 1; + AVFrame *out = arg; + AVFrame *in = s->in; + + for (int p = 0; p < s->nb_planes; p++) { + const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; + const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; + const int linesize = out->linesize[p] / 2; + const int in_linesize = in->linesize[p] / 2; + const int w = s->planewidth[p]; + const int w1 = w - 1;; + const int h = s->planeheight[p]; + const int h1 = h - 1; + uint16_t *dst = (uint16_t *)out->data[p] + slice_start * linesize; + const uint16_t *src = (const uint16_t *)in->data[p]; + + if (!((1 << p) & s->planes)) { + av_image_copy_plane((uint8_t *)dst, linesize, (uint8_t *)(src + slice_start * linesize), + in_linesize, w * 2, slice_end - slice_start); + continue; + } + + for (int y = slice_start; y < slice_end; y++) { + const int y0 = FFMAX(y - 1, 0); + const int y1 = FFMIN(y + 1, h1); + for (int x = 0; x < w; x++) { + const int x0 = FFMAX(x - 1, 0); + const int x1 = FFMIN(x + 1, w1); + int a = src[y0 * in_linesize + x0]; + int b = src[y0 * in_linesize + x]; + int c = src[y0 * in_linesize + x1]; + int d = src[y * in_linesize + x0]; + int e = src[y * in_linesize + x]; + int f = src[y * in_linesize + x1]; + int g = src[y1 * in_linesize + x0]; + int h = src[y1 * in_linesize + x]; + int i = src[y1 * in_linesize + x1]; + int mn, mn2, mx, mx2; + float amp, weight; + + mn = FFMIN3(FFMIN3( d, e, f), b, h); + mn2 = FFMIN3(FFMIN3(mn, a, c), g, i); + + mn = mn + mn2; + + mx = FFMAX3(FFMAX3( d, e, f), b, h); + mx2 = FFMAX3(FFMAX3(mx, a, c), g, i); + + mx = mx + mx2; + + amp = sqrtf(av_clipf(FFMIN(mn, max - mx) / (float)mx, 0.f, 1.f)); + + weight = amp / strength; + + dst[x] = av_clip_uintp2_c(((b + d + f + h) * weight + e) / (1.f + 4.f * weight), s->depth); + } + dst += linesize; + } + } + + return 0; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + AVFilterLink *outlink = ctx->outputs[0]; + CASContext *s = ctx->priv; + 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); + + s->in = in; + ctx->internal->execute(ctx, s->do_slice, out, NULL, + FFMIN(in->height, ff_filter_get_nb_threads(ctx))); + av_frame_free(&in); + s->in = NULL; + + return ff_filter_frame(ctx->outputs[0], out); +} + +static av_cold int query_formats(AVFilterContext *avctx) +{ + static const enum AVPixelFormat pixel_fmts[] = { + 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_YUV410P, AV_PIX_FMT_YUV411P, + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, + AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, + AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, + AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, + AV_PIX_FMT_YUVJ411P, + 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_YUV440P10, + AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12, + AV_PIX_FMT_YUV440P12, + AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14, + AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, + 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_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, + AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16, + AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16, + AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16, + AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, + AV_PIX_FMT_NONE + }; + + AVFilterFormats *formats = NULL; + + formats = ff_make_format_list(pixel_fmts); + if (!formats) + return AVERROR(ENOMEM); + + return ff_set_common_formats(avctx, formats); +} + +static av_cold int config_input(AVFilterLink *inlink) +{ + AVFilterContext *avctx = inlink->dst; + CASContext *s = avctx->priv; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + + s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); + s->planeheight[0] = s->planeheight[3] = inlink->h; + s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); + s->planewidth[0] = s->planewidth[3] = inlink->w; + + s->depth = desc->comp[0].depth; + s->nb_planes = desc->nb_components; + s->do_slice = s->depth <= 8 ? cas_slice8 : cas_slice16; + + return 0; +} + +static const AVFilterPad cas_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad cas_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +#define OFFSET(x) offsetof(CASContext, x) +#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM + +static const AVOption cas_options[] = { + { "strength", "set the sharpening strength", OFFSET(strength), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF }, + { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, VF }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(cas); + +AVFilter ff_vf_cas = { + .name = "cas", + .description = NULL_IF_CONFIG_SMALL("Contrast Adaptive Sharpen."), + .priv_size = sizeof(CASContext), + .priv_class = &cas_class, + .query_formats = query_formats, + .inputs = cas_inputs, + .outputs = cas_outputs, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, + .process_command = ff_filter_process_command, +};