| /* |
| * 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, |
| }; |
