287 lines
9.9 KiB
C
287 lines
9.9 KiB
C
/*
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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/opt.h"
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#include "libavutil/imgutils.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 CASContext {
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const AVClass *class;
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float strength;
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int planes;
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int nb_planes;
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int depth;
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int planeheight[4];
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int planewidth[4];
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AVFrame *in;
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int (*do_slice)(AVFilterContext *s, void *arg,
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int jobnr, int nb_jobs);
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} CASContext;
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static inline 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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static int cas_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
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{
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CASContext *s = avctx->priv;
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const float strength = -lerpf(16.f, 4.01f, s->strength);
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AVFrame *out = arg;
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AVFrame *in = s->in;
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for (int p = 0; p < s->nb_planes; p++) {
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const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
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const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
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const int linesize = out->linesize[p];
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const int in_linesize = in->linesize[p];
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const int w = s->planewidth[p];
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const int w1 = w - 1;
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const int h = s->planeheight[p];
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const int h1 = h - 1;
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uint8_t *dst = out->data[p] + slice_start * linesize;
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const uint8_t *src = in->data[p];
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if (!((1 << p) & s->planes)) {
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av_image_copy_plane(dst, linesize, src + slice_start * in_linesize, in_linesize,
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w, 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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const int y0 = FFMAX(y - 1, 0);
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const int y1 = FFMIN(y + 1, h1);
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for (int x = 0; x < w; x++) {
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const int x0 = FFMAX(x - 1, 0);
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const int x1 = FFMIN(x + 1, w1);
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int a = src[y0 * in_linesize + x0];
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int b = src[y0 * in_linesize + x];
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int c = src[y0 * in_linesize + x1];
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int d = src[y * in_linesize + x0];
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int e = src[y * in_linesize + x];
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int f = src[y * in_linesize + x1];
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int g = src[y1 * in_linesize + x0];
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int h = src[y1 * in_linesize + x];
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int i = src[y1 * in_linesize + x1];
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int mn, mn2, mx, mx2;
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float amp, weight;
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mn = FFMIN3(FFMIN3( d, e, f), b, h);
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mn2 = FFMIN3(FFMIN3(mn, a, c), g, i);
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mn = mn + mn2;
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mx = FFMAX3(FFMAX3( d, e, f), b, h);
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mx2 = FFMAX3(FFMAX3(mx, a, c), g, i);
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mx = mx + mx2;
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amp = sqrtf(av_clipf(FFMIN(mn, 511 - mx) / (float)mx, 0.f, 1.f));
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weight = amp / strength;
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dst[x] = av_clip_uint8(((b + d + f + h) * weight + e) / (1.f + 4.f * weight));
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}
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dst += 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 cas_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
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{
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CASContext *s = avctx->priv;
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const float strength = -lerpf(16.f, 4.01f, s->strength);
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const int max = 2 * (1 << s->depth) - 1;
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AVFrame *out = arg;
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AVFrame *in = s->in;
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for (int p = 0; p < s->nb_planes; p++) {
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const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
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const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
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const int linesize = out->linesize[p] / 2;
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const int in_linesize = in->linesize[p] / 2;
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const int w = s->planewidth[p];
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const int w1 = w - 1;
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const int h = s->planeheight[p];
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const int h1 = h - 1;
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uint16_t *dst = ((uint16_t *)out->data[p]) + slice_start * linesize;
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const uint16_t *src = (const uint16_t *)in->data[p];
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if (!((1 << p) & s->planes)) {
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av_image_copy_plane((uint8_t *)dst, linesize * 2, (uint8_t *)(src + slice_start * in_linesize),
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in_linesize * 2, w * 2, 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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const int y0 = FFMAX(y - 1, 0);
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const int y1 = FFMIN(y + 1, h1);
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for (int x = 0; x < w; x++) {
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const int x0 = FFMAX(x - 1, 0);
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const int x1 = FFMIN(x + 1, w1);
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int a = src[y0 * in_linesize + x0];
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int b = src[y0 * in_linesize + x];
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int c = src[y0 * in_linesize + x1];
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int d = src[y * in_linesize + x0];
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int e = src[y * in_linesize + x];
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int f = src[y * in_linesize + x1];
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int g = src[y1 * in_linesize + x0];
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int h = src[y1 * in_linesize + x];
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int i = src[y1 * in_linesize + x1];
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int mn, mn2, mx, mx2;
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float amp, weight;
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mn = FFMIN3(FFMIN3( d, e, f), b, h);
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mn2 = FFMIN3(FFMIN3(mn, a, c), g, i);
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mn = mn + mn2;
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mx = FFMAX3(FFMAX3( d, e, f), b, h);
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mx2 = FFMAX3(FFMAX3(mx, a, c), g, i);
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mx = mx + mx2;
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amp = sqrtf(av_clipf(FFMIN(mn, max - mx) / (float)mx, 0.f, 1.f));
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weight = amp / strength;
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dst[x] = av_clip_uintp2_c(((b + d + f + h) * weight + e) / (1.f + 4.f * weight), s->depth);
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}
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dst += 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 filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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CASContext *s = ctx->priv;
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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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}
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av_frame_copy_props(out, in);
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s->in = in;
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ff_filter_execute(ctx, s->do_slice, out, NULL,
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FFMIN(in->height, ff_filter_get_nb_threads(ctx)));
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av_frame_free(&in);
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s->in = NULL;
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return ff_filter_frame(ctx->outputs[0], out);
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}
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static const enum AVPixelFormat pixel_fmts[] = {
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AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
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AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
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AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
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AV_PIX_FMT_YUVJ411P,
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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_YUV440P10,
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
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AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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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_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
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AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
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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_NONE
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};
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static av_cold int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *avctx = inlink->dst;
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CASContext *s = avctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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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->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->depth = desc->comp[0].depth;
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s->nb_planes = desc->nb_components;
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s->do_slice = s->depth <= 8 ? cas_slice8 : cas_slice16;
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return 0;
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}
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static const AVFilterPad cas_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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.config_props = config_input,
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},
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};
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static const AVFilterPad cas_outputs[] = {
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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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#define OFFSET(x) offsetof(CASContext, x)
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#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption cas_options[] = {
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{ "strength", "set the sharpening strength", OFFSET(strength), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
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{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, VF },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(cas);
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const AVFilter ff_vf_cas = {
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.name = "cas",
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.description = NULL_IF_CONFIG_SMALL("Contrast Adaptive Sharpen."),
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.priv_size = sizeof(CASContext),
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.priv_class = &cas_class,
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FILTER_INPUTS(cas_inputs),
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FILTER_OUTPUTS(cas_outputs),
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FILTER_PIXFMTS_ARRAY(pixel_fmts),
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = ff_filter_process_command,
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};
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