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19ffa2ff2d
A filter needs formats.h iff it uses FILTER_QUERY_FUNC(); since lots of filters have been switched to use something else than FILTER_QUERY_FUNC, they don't need it any more, but removing this header has been forgotten. This commit does this; files with formats.h inclusion went down from 304 to 139 here (it were 449 before the preceding commit). While just at it, also improve the other headers a bit. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
510 lines
18 KiB
C
510 lines
18 KiB
C
/*
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* Copyright (c) 2002 A'rpi
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* @file
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* border detection filter
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* Ported from MPlayer libmpcodecs/vf_cropdetect.c.
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/opt.h"
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#include "libavutil/motion_vector.h"
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#include "libavutil/qsort.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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#include "edge_common.h"
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typedef struct CropDetectContext {
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const AVClass *class;
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int x1, y1, x2, y2;
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float limit;
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float limit_upscaled;
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int round;
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int skip;
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int reset_count;
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int frame_nb;
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int max_pixsteps[4];
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int max_outliers;
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int mode;
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int window_size;
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int mv_threshold;
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int bitdepth;
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float low, high;
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uint8_t low_u8, high_u8;
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uint8_t *filterbuf;
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uint8_t *tmpbuf;
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uint16_t *gradients;
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char *directions;
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int *bboxes[4];
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} CropDetectContext;
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
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AV_PIX_FMT_YUV411P, AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_YUV440P, 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,
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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_NV12, AV_PIX_FMT_NV21,
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_NONE
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};
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enum CropMode {
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MODE_BLACK,
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MODE_MV_EDGES,
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MODE_NB
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};
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static int comp(const int *a,const int *b)
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{
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return FFDIFFSIGN(*a, *b);
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}
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static int checkline(void *ctx, const unsigned char *src, int stride, int len, int bpp)
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{
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int total = 0;
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int div = len;
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const uint16_t *src16 = (const uint16_t *)src;
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switch (bpp) {
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case 1:
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while (len >= 8) {
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total += src[ 0] + src[ stride] + src[2*stride] + src[3*stride]
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+ src[4*stride] + src[5*stride] + src[6*stride] + src[7*stride];
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src += 8*stride;
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len -= 8;
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}
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while (--len >= 0) {
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total += src[0];
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src += stride;
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}
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break;
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case 2:
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stride >>= 1;
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while (len >= 8) {
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total += src16[ 0] + src16[ stride] + src16[2*stride] + src16[3*stride]
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+ src16[4*stride] + src16[5*stride] + src16[6*stride] + src16[7*stride];
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src16 += 8*stride;
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len -= 8;
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}
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while (--len >= 0) {
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total += src16[0];
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src16 += stride;
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}
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break;
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case 3:
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case 4:
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while (len >= 4) {
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total += src[0] + src[1 ] + src[2 ]
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+ src[ stride] + src[1+ stride] + src[2+ stride]
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+ src[2*stride] + src[1+2*stride] + src[2+2*stride]
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+ src[3*stride] + src[1+3*stride] + src[2+3*stride];
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src += 4*stride;
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len -= 4;
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}
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while (--len >= 0) {
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total += src[0] + src[1] + src[2];
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src += stride;
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}
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div *= 3;
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break;
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}
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total /= div;
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av_log(ctx, AV_LOG_DEBUG, "total:%d\n", total);
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return total;
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}
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static int checkline_edge(void *ctx, const unsigned char *src, int stride, int len, int bpp)
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{
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const uint16_t *src16 = (const uint16_t *)src;
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switch (bpp) {
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case 1:
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while (--len >= 0) {
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if (src[0]) return 0;
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src += stride;
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}
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break;
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case 2:
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stride >>= 1;
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while (--len >= 0) {
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if (src16[0]) return 0;
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src16 += stride;
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}
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break;
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case 3:
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case 4:
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while (--len >= 0) {
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if (src[0] || src[1] || src[2]) return 0;
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src += stride;
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}
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break;
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}
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return 1;
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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CropDetectContext *s = ctx->priv;
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s->frame_nb = -1 * s->skip;
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s->low_u8 = s->low * 255. + .5;
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s->high_u8 = s->high * 255. + .5;
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av_log(ctx, AV_LOG_VERBOSE, "limit:%f round:%d skip:%d reset_count:%d\n",
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s->limit, s->round, s->skip, s->reset_count);
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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CropDetectContext *s = ctx->priv;
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av_freep(&s->tmpbuf);
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av_freep(&s->filterbuf);
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av_freep(&s->gradients);
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av_freep(&s->directions);
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av_freep(&s->bboxes[0]);
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av_freep(&s->bboxes[1]);
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av_freep(&s->bboxes[2]);
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av_freep(&s->bboxes[3]);
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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CropDetectContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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const int bufsize = inlink->w * inlink->h;
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av_image_fill_max_pixsteps(s->max_pixsteps, NULL, desc);
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s->bitdepth = desc->comp[0].depth;
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if (s->limit < 1.0)
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s->limit_upscaled = s->limit * ((1 << s->bitdepth) - 1);
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else
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s->limit_upscaled = s->limit;
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s->x1 = inlink->w - 1;
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s->y1 = inlink->h - 1;
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s->x2 = 0;
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s->y2 = 0;
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s->window_size = FFMAX(s->reset_count, 15);
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s->tmpbuf = av_malloc(bufsize);
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s->filterbuf = av_malloc(bufsize * s->max_pixsteps[0]);
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s->gradients = av_calloc(bufsize, sizeof(*s->gradients));
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s->directions = av_malloc(bufsize);
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s->bboxes[0] = av_malloc(s->window_size * sizeof(*s->bboxes[0]));
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s->bboxes[1] = av_malloc(s->window_size * sizeof(*s->bboxes[1]));
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s->bboxes[2] = av_malloc(s->window_size * sizeof(*s->bboxes[2]));
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s->bboxes[3] = av_malloc(s->window_size * sizeof(*s->bboxes[3]));
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if (!s->tmpbuf || !s->filterbuf || !s->gradients || !s->directions ||
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!s->bboxes[0] || !s->bboxes[1] || !s->bboxes[2] || !s->bboxes[3])
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return AVERROR(ENOMEM);
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return 0;
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}
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#define SET_META(key, value) \
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av_dict_set_int(metadata, key, value, 0)
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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CropDetectContext *s = ctx->priv;
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int bpp = s->max_pixsteps[0];
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int w, h, x, y, shrink_by, i;
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AVDictionary **metadata;
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int outliers, last_y;
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int limit_upscaled = lrint(s->limit_upscaled);
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char limit_str[22];
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const int inw = inlink->w;
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const int inh = inlink->h;
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uint8_t *tmpbuf = s->tmpbuf;
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uint8_t *filterbuf = s->filterbuf;
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uint16_t *gradients = s->gradients;
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int8_t *directions = s->directions;
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const AVFrameSideData *sd = NULL;
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int scan_w, scan_h, bboff;
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void (*sobel)(int w, int h, uint16_t *dst, int dst_linesize,
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int8_t *dir, int dir_linesize,
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const uint8_t *src, int src_linesize, int src_stride) = (bpp == 2) ? &ff_sobel_16 : &ff_sobel_8;
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void (*gaussian_blur)(int w, int h,
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uint8_t *dst, int dst_linesize,
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const uint8_t *src, int src_linesize, int src_stride) = (bpp == 2) ? &ff_gaussian_blur_16 : &ff_gaussian_blur_8;
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// ignore first s->skip frames
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if (++s->frame_nb > 0) {
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metadata = &frame->metadata;
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// Reset the crop area every reset_count frames, if reset_count is > 0
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if (s->reset_count > 0 && s->frame_nb > s->reset_count) {
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s->x1 = frame->width - 1;
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s->y1 = frame->height - 1;
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s->x2 = 0;
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s->y2 = 0;
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s->frame_nb = 1;
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}
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#define FIND(DST, FROM, NOEND, INC, STEP0, STEP1, LEN) \
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outliers = 0;\
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for (last_y = y = FROM; NOEND; y = y INC) {\
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if (checkline(ctx, frame->data[0] + STEP0 * y, STEP1, LEN, bpp) > limit_upscaled) {\
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if (++outliers > s->max_outliers) { \
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DST = last_y;\
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break;\
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}\
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} else\
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last_y = y INC;\
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}
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if (s->mode == MODE_BLACK) {
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FIND(s->y1, 0, y < s->y1, +1, frame->linesize[0], bpp, frame->width);
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FIND(s->y2, frame->height - 1, y > FFMAX(s->y2, s->y1), -1, frame->linesize[0], bpp, frame->width);
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FIND(s->x1, 0, y < s->x1, +1, bpp, frame->linesize[0], frame->height);
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FIND(s->x2, frame->width - 1, y > FFMAX(s->x2, s->x1), -1, bpp, frame->linesize[0], frame->height);
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} else { // MODE_MV_EDGES
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sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
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s->x1 = 0;
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s->y1 = 0;
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s->x2 = inw - 1;
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s->y2 = inh - 1;
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if (!sd) {
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av_log(ctx, AV_LOG_WARNING, "Cannot detect: no motion vectors available");
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} else {
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// gaussian filter to reduce noise
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gaussian_blur(inw, inh,
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filterbuf, inw*bpp,
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frame->data[0], frame->linesize[0], bpp);
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// compute the 16-bits gradients and directions for the next step
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sobel(inw, inh, gradients, inw, directions, inw, filterbuf, inw*bpp, bpp);
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// non_maximum_suppression() will actually keep & clip what's necessary and
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// ignore the rest, so we need a clean output buffer
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memset(tmpbuf, 0, inw * inh);
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ff_non_maximum_suppression(inw, inh, tmpbuf, inw, directions, inw, gradients, inw);
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// keep high values, or low values surrounded by high values
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ff_double_threshold(s->low_u8, s->high_u8, inw, inh,
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tmpbuf, inw, tmpbuf, inw);
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// scan all MVs and store bounding box
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s->x1 = inw - 1;
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s->y1 = inh - 1;
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s->x2 = 0;
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s->y2 = 0;
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for (i = 0; i < sd->size / sizeof(AVMotionVector); i++) {
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const AVMotionVector *mv = (const AVMotionVector*)sd->data + i;
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const int mx = mv->dst_x - mv->src_x;
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const int my = mv->dst_y - mv->src_y;
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if (mv->dst_x >= 0 && mv->dst_x < inw &&
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mv->dst_y >= 0 && mv->dst_y < inh &&
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mv->src_x >= 0 && mv->src_x < inw &&
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mv->src_y >= 0 && mv->src_y < inh &&
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mx * mx + my * my >= s->mv_threshold * s->mv_threshold) {
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s->x1 = mv->dst_x < s->x1 ? mv->dst_x : s->x1;
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s->y1 = mv->dst_y < s->y1 ? mv->dst_y : s->y1;
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s->x2 = mv->dst_x > s->x2 ? mv->dst_x : s->x2;
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s->y2 = mv->dst_y > s->y2 ? mv->dst_y : s->y2;
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}
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}
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// assert x1<x2, y1<y2
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if (s->x1 > s->x2) FFSWAP(int, s->x1, s->x2);
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if (s->y1 > s->y2) FFSWAP(int, s->y1, s->y2);
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// scan outward looking for 0-edge-lines in edge image
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scan_w = s->x2 - s->x1;
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scan_h = s->y2 - s->y1;
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#define FIND_EDGE(DST, FROM, NOEND, INC, STEP0, STEP1, LEN) \
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for (last_y = y = FROM; NOEND; y = y INC) { \
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if (checkline_edge(ctx, tmpbuf + STEP0 * y, STEP1, LEN, bpp)) { \
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if (last_y INC == y) { \
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DST = y; \
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break; \
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} else \
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last_y = y; \
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} \
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} \
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if (!(NOEND)) { \
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DST = y -(INC); \
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}
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FIND_EDGE(s->y1, s->y1, y >= 0, -1, inw, bpp, scan_w);
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FIND_EDGE(s->y2, s->y2, y < inh, +1, inw, bpp, scan_w);
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FIND_EDGE(s->x1, s->x1, y >= 0, -1, bpp, inw, scan_h);
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FIND_EDGE(s->x2, s->x2, y < inw, +1, bpp, inw, scan_h);
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// queue bboxes
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bboff = (s->frame_nb - 1) % s->window_size;
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s->bboxes[0][bboff] = s->x1;
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s->bboxes[1][bboff] = s->x2;
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s->bboxes[2][bboff] = s->y1;
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s->bboxes[3][bboff] = s->y2;
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// sort queue
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bboff = FFMIN(s->frame_nb, s->window_size);
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AV_QSORT(s->bboxes[0], bboff, int, comp);
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AV_QSORT(s->bboxes[1], bboff, int, comp);
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AV_QSORT(s->bboxes[2], bboff, int, comp);
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AV_QSORT(s->bboxes[3], bboff, int, comp);
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// return median of window_size elems
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s->x1 = s->bboxes[0][bboff/2];
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s->x2 = s->bboxes[1][bboff/2];
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s->y1 = s->bboxes[2][bboff/2];
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s->y2 = s->bboxes[3][bboff/2];
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}
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}
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// round x and y (up), important for yuv colorspaces
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// make sure they stay rounded!
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x = (s->x1+1) & ~1;
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y = (s->y1+1) & ~1;
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w = s->x2 - x + 1;
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h = s->y2 - y + 1;
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// w and h must be divisible by 2 as well because of yuv
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// colorspace problems.
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if (s->round <= 1)
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s->round = 16;
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if (s->round % 2)
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s->round *= 2;
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shrink_by = w % s->round;
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w -= shrink_by;
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x += (shrink_by/2 + 1) & ~1;
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shrink_by = h % s->round;
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h -= shrink_by;
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y += (shrink_by/2 + 1) & ~1;
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SET_META("lavfi.cropdetect.x1", s->x1);
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SET_META("lavfi.cropdetect.x2", s->x2);
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SET_META("lavfi.cropdetect.y1", s->y1);
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SET_META("lavfi.cropdetect.y2", s->y2);
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SET_META("lavfi.cropdetect.w", w);
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SET_META("lavfi.cropdetect.h", h);
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SET_META("lavfi.cropdetect.x", x);
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SET_META("lavfi.cropdetect.y", y);
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snprintf(limit_str, sizeof(limit_str), "%f", s->limit);
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av_dict_set(metadata, "lavfi.cropdetect.limit", limit_str, 0);
|
|
|
|
av_log(ctx, AV_LOG_INFO,
|
|
"x1:%d x2:%d y1:%d y2:%d w:%d h:%d x:%d y:%d pts:%"PRId64" t:%f limit:%f crop=%d:%d:%d:%d\n",
|
|
s->x1, s->x2, s->y1, s->y2, w, h, x, y, frame->pts,
|
|
frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base),
|
|
s->limit, w, h, x, y);
|
|
}
|
|
|
|
return ff_filter_frame(inlink->dst->outputs[0], frame);
|
|
}
|
|
|
|
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
|
|
char *res, int res_len, int flags)
|
|
{
|
|
CropDetectContext *s = ctx->priv;
|
|
float old_limit = s->limit;
|
|
int ret;
|
|
|
|
if ((ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags)) < 0)
|
|
return ret;
|
|
|
|
if (old_limit != s->limit) {
|
|
if (s->limit < 1.0)
|
|
s->limit_upscaled = s->limit * ((1 << s->bitdepth) - 1);
|
|
else
|
|
s->limit_upscaled = s->limit;
|
|
s->frame_nb = s->reset_count;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(CropDetectContext, x)
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
|
|
|
|
static const AVOption cropdetect_options[] = {
|
|
{ "limit", "Threshold below which the pixel is considered black", OFFSET(limit), AV_OPT_TYPE_FLOAT, { .dbl = 24.0/255 }, 0, 65535, TFLAGS },
|
|
{ "round", "Value by which the width/height should be divisible", OFFSET(round), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, FLAGS },
|
|
{ "reset", "Recalculate the crop area after this many frames", OFFSET(reset_count), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "skip", "Number of initial frames to skip", OFFSET(skip), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, FLAGS },
|
|
{ "reset_count", "Recalculate the crop area after this many frames",OFFSET(reset_count),AV_OPT_TYPE_INT,{ .i64 = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "max_outliers", "Threshold count of outliers", OFFSET(max_outliers),AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_BLACK}, 0, MODE_NB-1, FLAGS, "mode" },
|
|
{ "black", "detect black pixels surrounding the video", 0, AV_OPT_TYPE_CONST, {.i64=MODE_BLACK}, INT_MIN, INT_MAX, FLAGS, "mode" },
|
|
{ "mvedges", "detect motion and edged surrounding the video", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MV_EDGES}, INT_MIN, INT_MAX, FLAGS, "mode" },
|
|
{ "high", "Set high threshold for edge detection", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=25/255.}, 0, 1, FLAGS },
|
|
{ "low", "Set low threshold for edge detection", OFFSET(low), AV_OPT_TYPE_FLOAT, {.dbl=15/255.}, 0, 1, FLAGS },
|
|
{ "mv_threshold", "motion vector threshold when estimating video window size", OFFSET(mv_threshold), AV_OPT_TYPE_INT, {.i64=8}, 0, 100, FLAGS},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(cropdetect);
|
|
|
|
static const AVFilterPad avfilter_vf_cropdetect_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_cropdetect = {
|
|
.name = "cropdetect",
|
|
.description = NULL_IF_CONFIG_SMALL("Auto-detect crop size."),
|
|
.priv_size = sizeof(CropDetectContext),
|
|
.priv_class = &cropdetect_class,
|
|
.init = init,
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(avfilter_vf_cropdetect_inputs),
|
|
FILTER_OUTPUTS(ff_video_default_filterpad),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_METADATA_ONLY,
|
|
.process_command = process_command,
|
|
};
|