mirror of
https://github.com/FFmpeg/FFmpeg.git
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302 lines
9.4 KiB
C
302 lines
9.4 KiB
C
/*
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* Copyright (c) 2020 Paul B Mahol
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*
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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/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 DBlurContext {
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const AVClass *class;
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float angle;
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float radius;
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int planes;
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float b0, b1, q, c, R3;
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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 *buffer;
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int nb_planes;
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} DBlurContext;
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#define OFFSET(x) offsetof(DBlurContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption dblur_options[] = {
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{ "angle", "set angle", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl=45}, 0.0, 360, FLAGS },
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{ "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_FLOAT, {.dbl=5}, 1, 8192, FLAGS },
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{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(dblur);
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#define f(n, m) (dst[(n) * width + (m)])
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static int filter_horizontally(AVFilterContext *ctx, int width, int height)
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{
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DBlurContext *s = ctx->priv;
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const float b0 = s->b0;
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const float b1 = s->b1;
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const float q = s->q;
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const float c = s->c;
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float *dst = s->buffer;
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float g;
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if (s->R3 > 0) {
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for (int y = 1; y < height - 1; y++) {
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g = q * f(y, 0) + c * f(y, 0);
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for (int x = 0; x < width; x++) {
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f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
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g = q * f(y, x) + c * f(y - 1, x);
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}
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}
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for (int y = height - 2; y >= 0; y--) {
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g = q * f(y, width - 1) + c * f(y, width - 1);
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for (int x = width - 1; x >= 0; x--) {
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f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
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g = q * f(y, x) + c * f(y + 1, x);
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}
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}
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} else {
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for (int y = 1; y < height - 1; y++) {
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g = q * f(y, width - 1) + c * f(y, width - 1);
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for (int x = width - 1; x >= 0; x--) {
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f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g;
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g = q * f(y, x) + c * f(y - 1, x);
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}
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}
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for (int y = height - 2; y >= 0; y--) {
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g = q * f(y, 0) + c * f(y, 0);
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for (int x = 0; x < width; x++) {
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f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g;
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g = q * f(y, x) + c * f(y + 1, x);
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}
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}
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}
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return 0;
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}
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static void diriir2d(AVFilterContext *ctx, int plane)
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{
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DBlurContext *s = ctx->priv;
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const int width = s->planewidth[plane];
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const int height = s->planeheight[plane];
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filter_horizontally(ctx, width, height);
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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_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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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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static av_cold void uninit(AVFilterContext *ctx)
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{
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DBlurContext *s = ctx->priv;
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av_freep(&s->buffer);
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}
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static int config_input(AVFilterLink *inlink)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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DBlurContext *s = inlink->dst->priv;
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uninit(inlink->dst);
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s->depth = desc->comp[0].depth;
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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->buffer = av_malloc_array(FFALIGN(inlink->w, 16), FFALIGN(inlink->h, 16) * sizeof(*s->buffer));
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if (!s->buffer)
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return AVERROR(ENOMEM);
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return 0;
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}
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static void set_params(DBlurContext *s, float angle, float r)
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{
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float mu, nu, R1, R2, w1, w2;
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float a0, a1, a2, a3;
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angle = angle * M_PI / 180.f;
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mu = cosf(angle);
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nu = sinf(angle);
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R1 = (mu * r) * (mu * r);
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R2 = (nu * r) * (nu * r);
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s->R3 = mu * nu * r * r;
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w1 = sqrtf(0.25f + R1);
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w2 = sqrtf(0.25f + R2);
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a0 = (w1 + 0.5f) * (w2 + 0.5f) - fabsf(s->R3);
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a1 = 0.5f + w2 - a0;
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a2 = 0.5f + w1 - a0;
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a3 = a0 - w1 - w2;
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s->b0 = 1.f / a0;
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s->b1 = -a2 / a0;
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s->q = -a1 / a0;
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s->c = -a3 / a0;
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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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DBlurContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out;
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int plane;
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set_params(s, s->angle, s->radius);
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if (av_frame_is_writable(in)) {
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out = in;
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} else {
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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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}
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for (plane = 0; plane < s->nb_planes; plane++) {
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const int height = s->planeheight[plane];
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const int width = s->planewidth[plane];
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float *bptr = s->buffer;
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const uint8_t *src = in->data[plane];
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const uint16_t *src16 = (const uint16_t *)in->data[plane];
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uint8_t *dst = out->data[plane];
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uint16_t *dst16 = (uint16_t *)out->data[plane];
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int y, x;
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if (!(s->planes & (1 << plane))) {
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if (out != in)
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av_image_copy_plane(out->data[plane], out->linesize[plane],
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in->data[plane], in->linesize[plane],
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width * ((s->depth + 7) / 8), height);
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continue;
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}
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if (s->depth == 8) {
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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bptr[x] = src[x];
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}
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bptr += width;
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src += in->linesize[plane];
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}
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} else {
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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bptr[x] = src16[x];
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}
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bptr += width;
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src16 += in->linesize[plane] / 2;
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}
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}
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diriir2d(ctx, plane);
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bptr = s->buffer;
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if (s->depth == 8) {
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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dst[x] = av_clip_uint8(lrintf(bptr[x]));
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}
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bptr += width;
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dst += out->linesize[plane];
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}
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} else {
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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dst16[x] = av_clip_uintp2_c(lrintf(bptr[x]), s->depth);
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}
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bptr += width;
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dst16 += out->linesize[plane] / 2;
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}
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}
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}
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if (out != in)
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static const AVFilterPad dblur_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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.filter_frame = filter_frame,
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},
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};
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static const AVFilterPad dblur_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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const AVFilter ff_vf_dblur = {
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.name = "dblur",
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.description = NULL_IF_CONFIG_SMALL("Apply Directional Blur filter."),
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.priv_size = sizeof(DBlurContext),
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.priv_class = &dblur_class,
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.uninit = uninit,
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FILTER_INPUTS(dblur_inputs),
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FILTER_OUTPUTS(dblur_outputs),
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FILTER_PIXFMTS_ARRAY(pix_fmts),
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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.process_command = ff_filter_process_command,
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};
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