FFmpeg coverage

Directory:	../../../ffmpeg/
File:	src/libavfilter/vf_blackdetect.c
Date:	2024-11-20 23:03:26

	Total	Coverage
Lines:	89	0.0%
Functions:	5	0.0%
Branches:	30	0.0%

  
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      /*
    
       * Copyright (c) 2012 Stefano Sabatini
    
       *
    
       * 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
    
       */
    
      /**
    
       * @file
    
       * Video black detector, loosely based on blackframe with extended
    
       * syntax and features
    
       */
    
      #include <float.h>
    
      #include "libavutil/mem.h"
    
      #include "libavutil/opt.h"
    
      #include "libavutil/pixdesc.h"
    
      #include "libavutil/timestamp.h"
    
      #include "avfilter.h"
    
      #include "filters.h"
    
      #include "video.h"
    
      typedef struct BlackDetectContext {
    
          const AVClass *class;
    
          double  black_min_duration_time; ///< minimum duration of detected black, in seconds
    
          int64_t black_min_duration;      ///< minimum duration of detected black, expressed in timebase units
    
          int64_t black_start;             ///< pts start time of the first black picture
    
          int64_t black_end;               ///< pts end time of the last black picture
    
          int64_t last_picref_pts;         ///< pts of the last input picture
    
          int black_started;
    
          double       picture_black_ratio_th;
    
          double       pixel_black_th;
    
          unsigned int pixel_black_th_i;
    
          unsigned int nb_black_pixels;   ///< number of black pixels counted so far
    
          AVRational   time_base;
    
          int          depth;
    
          int          nb_threads;
    
          unsigned int *counter;
    
      } BlackDetectContext;
    
      #define OFFSET(x) offsetof(BlackDetectContext, x)
    
      #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
    
      static const AVOption blackdetect_options[] = {
    
          { "d",                  "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
    
          { "black_min_duration", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
    
          { "picture_black_ratio_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
    
          { "pic_th",                 "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
    
          { "pixel_black_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
    
          { "pix_th",         "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
    
          { NULL }
    
      };
    
      AVFILTER_DEFINE_CLASS(blackdetect);
    
      #define YUVJ_FORMATS \
    
          AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
    
      static const enum AVPixelFormat yuvj_formats[] = {
    
          YUVJ_FORMATS, AV_PIX_FMT_NONE
    
      };
    
      static const enum AVPixelFormat pix_fmts[] = {
    
          AV_PIX_FMT_GRAY8,
    
          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_NV12, AV_PIX_FMT_NV21,
    
          YUVJ_FORMATS,
    
          AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
    
          AV_PIX_FMT_GRAY16,
    
          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_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_NONE
    
      };
    
      ✗
      static int config_input(AVFilterLink *inlink)
    
      {
    
      ✗
          AVFilterContext *ctx = inlink->dst;
    
      ✗
          BlackDetectContext *s = ctx->priv;
    
      ✗
          const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
    
      ✗
          const int depth = desc->comp[0].depth;
    
      ✗
          s->depth = depth;
    
      ✗
          s->nb_threads = ff_filter_get_nb_threads(ctx);
    
      ✗
          s->time_base = inlink->time_base;
    
      ✗
          s->black_min_duration = s->black_min_duration_time / av_q2d(s->time_base);
    
      ✗
          s->counter = av_calloc(s->nb_threads, sizeof(*s->counter));
    
      ✗
          if (!s->counter)
    
      ✗
              return AVERROR(ENOMEM);
    
      ✗
          av_log(s, AV_LOG_VERBOSE,
    
                 "black_min_duration:%s pixel_black_th:%f picture_black_ratio_th:%f\n",
    
      ✗
                 av_ts2timestr(s->black_min_duration, &s->time_base),
    
                 s->pixel_black_th, s->picture_black_ratio_th);
    
      ✗
          return 0;
    
      }
    
      ✗
      static void check_black_end(AVFilterContext *ctx)
    
      {
    
      ✗
          BlackDetectContext *s = ctx->priv;
    
      ✗
          if ((s->black_end - s->black_start) >= s->black_min_duration) {
    
      ✗
              av_log(s, AV_LOG_INFO,
    
                     "black_start:%s black_end:%s black_duration:%s\n",
    
      ✗
                     av_ts2timestr(s->black_start, &s->time_base),
    
      ✗
                     av_ts2timestr(s->black_end,   &s->time_base),
    
      ✗
                     av_ts2timestr(s->black_end - s->black_start, &s->time_base));
    
          }
    
      ✗
      }
    
      ✗
      static int black_counter(AVFilterContext *ctx, void *arg,
    
                               int jobnr, int nb_jobs)
    
      {
    
      ✗
          BlackDetectContext *s = ctx->priv;
    
      ✗
          const unsigned int threshold = s->pixel_black_th_i;
    
      ✗
          unsigned int *counterp = &s->counter[jobnr];
    
      ✗
          AVFrame *in = arg;
    
      ✗
          const int linesize = in->linesize[0];
    
      ✗
          const int w = in->width;
    
      ✗
          const int h = in->height;
    
      ✗
          const int start = (h * jobnr) / nb_jobs;
    
      ✗
          const int end = (h * (jobnr+1)) / nb_jobs;
    
      ✗
          const int size = end - start;
    
      ✗
          unsigned int counter = 0;
    
      ✗
          if (s->depth == 8) {
    
      ✗
              const uint8_t *p = in->data[0] + start * linesize;
    
      ✗
              for (int i = 0; i < size; i++) {
    
      ✗
                  for (int x = 0; x < w; x++)
    
      ✗
                      counter += p[x] <= threshold;
    
      ✗
                  p += linesize;
    
              }
    
          } else {
    
      ✗
              const uint16_t *p = (const uint16_t *)(in->data[0] + start * linesize);
    
      ✗
              for (int i = 0; i < size; i++) {
    
      ✗
                  for (int x = 0; x < w; x++)
    
      ✗
                      counter += p[x] <= threshold;
    
      ✗
                  p += linesize / 2;
    
              }
    
          }
    
      ✗
          *counterp = counter;
    
      ✗
          return 0;
    
      }
    
      ✗
      static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
    
      {
    
      ✗
          FilterLink *inl = ff_filter_link(inlink);
    
      ✗
          AVFilterContext *ctx = inlink->dst;
    
      ✗
          BlackDetectContext *s = ctx->priv;
    
      ✗
          double picture_black_ratio = 0;
    
      ✗
          const int max = (1 << s->depth) - 1;
    
      ✗
          const int factor = (1 << (s->depth - 8));
    
      ✗
          const int full = picref->color_range == AVCOL_RANGE_JPEG ||
    
      ✗
                           ff_fmt_is_in(picref->format, yuvj_formats);
    
      ✗
          s->pixel_black_th_i = full ? s->pixel_black_th * max :
    
              // luminance_minimum_value + pixel_black_th * luminance_range_size
    
      ✗
              16 * factor + s->pixel_black_th * (235 - 16) * factor;
    
      ✗
          ff_filter_execute(ctx, black_counter, picref, NULL,
    
      ✗
                            FFMIN(inlink->h, s->nb_threads));
    
      ✗
          for (int i = 0; i < s->nb_threads; i++)
    
      ✗
              s->nb_black_pixels += s->counter[i];
    
      ✗
          picture_black_ratio = (double)s->nb_black_pixels / (inlink->w * inlink->h);
    
      ✗
          av_log(ctx, AV_LOG_DEBUG,
    
                 "frame:%"PRId64" picture_black_ratio:%f pts:%s t:%s type:%c\n",
    
                 inl->frame_count_out, picture_black_ratio,
    
      ✗
                 av_ts2str(picref->pts), av_ts2timestr(picref->pts, &s->time_base),
    
      ✗
                 av_get_picture_type_char(picref->pict_type));
    
      ✗
          if (picture_black_ratio >= s->picture_black_ratio_th) {
    
      ✗
              if (!s->black_started) {
    
                  /* black starts here */
    
      ✗
                  s->black_started = 1;
    
      ✗
                  s->black_start = picref->pts;
    
      ✗
                  av_dict_set(&picref->metadata, "lavfi.black_start",
    
      ✗
                      av_ts2timestr(s->black_start, &s->time_base), 0);
    
              }
    
      ✗
          } else if (s->black_started) {
    
              /* black ends here */
    
      ✗
              s->black_started = 0;
    
      ✗
              s->black_end = picref->pts;
    
      ✗
              check_black_end(ctx);
    
      ✗
              av_dict_set(&picref->metadata, "lavfi.black_end",
    
      ✗
                  av_ts2timestr(s->black_end, &s->time_base), 0);
    
          }
    
      ✗
          s->last_picref_pts = picref->pts;
    
      ✗
          s->nb_black_pixels = 0;
    
      ✗
          return ff_filter_frame(inlink->dst->outputs[0], picref);
    
      }
    
      ✗
      static av_cold void uninit(AVFilterContext *ctx)
    
      {
    
      ✗
          BlackDetectContext *s = ctx->priv;
    
      ✗
          av_freep(&s->counter);
    
      ✗
          if (s->black_started) {
    
              // FIXME: black_end should be set to last_picref_pts + last_picref_duration
    
      ✗
              s->black_end = s->last_picref_pts;
    
      ✗
              check_black_end(ctx);
    
          }
    
      ✗
      }
    
      static const AVFilterPad blackdetect_inputs[] = {
    
          {
    
              .name          = "default",
    
              .type          = AVMEDIA_TYPE_VIDEO,
    
              .config_props  = config_input,
    
              .filter_frame  = filter_frame,
    
          },
    
      };
    
      const AVFilter ff_vf_blackdetect = {
    
          .name          = "blackdetect",
    
          .description   = NULL_IF_CONFIG_SMALL("Detect video intervals that are (almost) black."),
    
          .priv_size     = sizeof(BlackDetectContext),
    
          FILTER_INPUTS(blackdetect_inputs),
    
          FILTER_OUTPUTS(ff_video_default_filterpad),
    
          FILTER_PIXFMTS_ARRAY(pix_fmts),
    
          .uninit        = uninit,
    
          .priv_class    = &blackdetect_class,
    
          .flags         = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_METADATA_ONLY,
    
      };

Line	Exec	Source
1		/*
2		* Copyright (c) 2012 Stefano Sabatini
3		*
4		* This file is part of FFmpeg.
5		*
6		* FFmpeg is free software; you can redistribute it and/or
7		* modify it under the terms of the GNU Lesser General Public
8		* License as published by the Free Software Foundation; either
9		* version 2.1 of the License, or (at your option) any later version.
10		*
11		* FFmpeg is distributed in the hope that it will be useful,
12		* but WITHOUT ANY WARRANTY; without even the implied warranty of
13		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14		* Lesser General Public License for more details.
15		*
16		* You should have received a copy of the GNU Lesser General Public
17		* License along with FFmpeg; if not, write to the Free Software
18		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19		*/
20
21		/**
22		* @file
23		* Video black detector, loosely based on blackframe with extended
24		* syntax and features
25		*/
26
27		#include <float.h>
28		#include "libavutil/mem.h"
29		#include "libavutil/opt.h"
30		#include "libavutil/pixdesc.h"
31		#include "libavutil/timestamp.h"
32		#include "avfilter.h"
33		#include "filters.h"
34		#include "video.h"
35
36		typedef struct BlackDetectContext {
37		const AVClass *class;
38		double black_min_duration_time; ///< minimum duration of detected black, in seconds
39		int64_t black_min_duration; ///< minimum duration of detected black, expressed in timebase units
40		int64_t black_start; ///< pts start time of the first black picture
41		int64_t black_end; ///< pts end time of the last black picture
42		int64_t last_picref_pts; ///< pts of the last input picture
43		int black_started;
44
45		double picture_black_ratio_th;
46		double pixel_black_th;
47		unsigned int pixel_black_th_i;
48
49		unsigned int nb_black_pixels; ///< number of black pixels counted so far
50		AVRational time_base;
51		int depth;
52		int nb_threads;
53		unsigned int *counter;
54		} BlackDetectContext;
55
56		#define OFFSET(x) offsetof(BlackDetectContext, x)
57		#define FLAGS AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM
58
59		static const AVOption blackdetect_options[] = {
60		{ "d", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
61		{ "black_min_duration", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
62		{ "picture_black_ratio_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
63		{ "pic_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
64		{ "pixel_black_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
65		{ "pix_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
66		{ NULL }
67		};
68
69		AVFILTER_DEFINE_CLASS(blackdetect);
70
71		#define YUVJ_FORMATS \
72		AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
73
74		static const enum AVPixelFormat yuvj_formats[] = {
75		YUVJ_FORMATS, AV_PIX_FMT_NONE
76		};
77
78		static const enum AVPixelFormat pix_fmts[] = {
79		AV_PIX_FMT_GRAY8,
80		AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
81		AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
82		AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
83		AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
84		YUVJ_FORMATS,
85		AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
86		AV_PIX_FMT_GRAY16,
87		AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
88		AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
89		AV_PIX_FMT_YUV440P10,
90		AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
91		AV_PIX_FMT_YUV440P12,
92		AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
93		AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
94		AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
95		AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
96		AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
97		AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
98		AV_PIX_FMT_NONE
99		};
100
101	✗	static int config_input(AVFilterLink *inlink)
102		{
103	✗	AVFilterContext *ctx = inlink->dst;
104	✗	BlackDetectContext *s = ctx->priv;
105	✗	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
106	✗	const int depth = desc->comp[0].depth;
107
108	✗	s->depth = depth;
109	✗	s->nb_threads = ff_filter_get_nb_threads(ctx);
110	✗	s->time_base = inlink->time_base;
111	✗	s->black_min_duration = s->black_min_duration_time / av_q2d(s->time_base);
112	✗	s->counter = av_calloc(s->nb_threads, sizeof(*s->counter));
113	✗	if (!s->counter)
114	✗	return AVERROR(ENOMEM);
115
116	✗	av_log(s, AV_LOG_VERBOSE,
117		"black_min_duration:%s pixel_black_th:%f picture_black_ratio_th:%f\n",
118	✗	av_ts2timestr(s->black_min_duration, &s->time_base),
119		s->pixel_black_th, s->picture_black_ratio_th);
120	✗	return 0;
121		}
122
123	✗	static void check_black_end(AVFilterContext *ctx)
124		{
125	✗	BlackDetectContext *s = ctx->priv;
126
127	✗	if ((s->black_end - s->black_start) >= s->black_min_duration) {
128	✗	av_log(s, AV_LOG_INFO,
129		"black_start:%s black_end:%s black_duration:%s\n",
130	✗	av_ts2timestr(s->black_start, &s->time_base),
131	✗	av_ts2timestr(s->black_end, &s->time_base),
132	✗	av_ts2timestr(s->black_end - s->black_start, &s->time_base));
133		}
134	✗	}
135
136	✗	static int black_counter(AVFilterContext ctx, void arg,
137		int jobnr, int nb_jobs)
138		{
139	✗	BlackDetectContext *s = ctx->priv;
140	✗	const unsigned int threshold = s->pixel_black_th_i;
141	✗	unsigned int *counterp = &s->counter[jobnr];
142	✗	AVFrame *in = arg;
143	✗	const int linesize = in->linesize[0];
144	✗	const int w = in->width;
145	✗	const int h = in->height;
146	✗	const int start = (h * jobnr) / nb_jobs;
147	✗	const int end = (h * (jobnr+1)) / nb_jobs;
148	✗	const int size = end - start;
149	✗	unsigned int counter = 0;
150
151	✗	if (s->depth == 8) {
152	✗	const uint8_t p = in->data[0] + start linesize;
153
154	✗	for (int i = 0; i < size; i++) {
155	✗	for (int x = 0; x < w; x++)
156	✗	counter += p[x] <= threshold;
157	✗	p += linesize;
158		}
159		} else {
160	✗	const uint16_t p = (const uint16_t )(in->data[0] + start * linesize);
161
162	✗	for (int i = 0; i < size; i++) {
163	✗	for (int x = 0; x < w; x++)
164	✗	counter += p[x] <= threshold;
165	✗	p += linesize / 2;
166		}
167		}
168
169	✗	*counterp = counter;
170
171	✗	return 0;
172		}
173
174	✗	static int filter_frame(AVFilterLink inlink, AVFrame picref)
175		{
176	✗	FilterLink *inl = ff_filter_link(inlink);
177	✗	AVFilterContext *ctx = inlink->dst;
178	✗	BlackDetectContext *s = ctx->priv;
179	✗	double picture_black_ratio = 0;
180	✗	const int max = (1 << s->depth) - 1;
181	✗	const int factor = (1 << (s->depth - 8));
182	✗	const int full = picref->color_range == AVCOL_RANGE_JPEG \|\|
183	✗	ff_fmt_is_in(picref->format, yuvj_formats);
184
185	✗	s->pixel_black_th_i = full ? s->pixel_black_th * max :
186		// luminance_minimum_value + pixel_black_th * luminance_range_size
187	✗	16 * factor + s->pixel_black_th * (235 - 16) * factor;
188
189	✗	ff_filter_execute(ctx, black_counter, picref, NULL,
190	✗	FFMIN(inlink->h, s->nb_threads));
191
192	✗	for (int i = 0; i < s->nb_threads; i++)
193	✗	s->nb_black_pixels += s->counter[i];
194
195	✗	picture_black_ratio = (double)s->nb_black_pixels / (inlink->w * inlink->h);
196
197	✗	av_log(ctx, AV_LOG_DEBUG,
198		"frame:%"PRId64" picture_black_ratio:%f pts:%s t:%s type:%c\n",
199		inl->frame_count_out, picture_black_ratio,
200	✗	av_ts2str(picref->pts), av_ts2timestr(picref->pts, &s->time_base),
201	✗	av_get_picture_type_char(picref->pict_type));
202
203	✗	if (picture_black_ratio >= s->picture_black_ratio_th) {
204	✗	if (!s->black_started) {
205		/* black starts here */
206	✗	s->black_started = 1;
207	✗	s->black_start = picref->pts;
208	✗	av_dict_set(&picref->metadata, "lavfi.black_start",
209	✗	av_ts2timestr(s->black_start, &s->time_base), 0);
210		}
211	✗	} else if (s->black_started) {
212		/* black ends here */
213	✗	s->black_started = 0;
214	✗	s->black_end = picref->pts;
215	✗	check_black_end(ctx);
216	✗	av_dict_set(&picref->metadata, "lavfi.black_end",
217	✗	av_ts2timestr(s->black_end, &s->time_base), 0);
218		}
219
220	✗	s->last_picref_pts = picref->pts;
221	✗	s->nb_black_pixels = 0;
222	✗	return ff_filter_frame(inlink->dst->outputs[0], picref);
223		}
224
225	✗	static av_cold void uninit(AVFilterContext *ctx)
226		{
227	✗	BlackDetectContext *s = ctx->priv;
228
229	✗	av_freep(&s->counter);
230
231	✗	if (s->black_started) {
232		// FIXME: black_end should be set to last_picref_pts + last_picref_duration
233	✗	s->black_end = s->last_picref_pts;
234	✗	check_black_end(ctx);
235		}
236	✗	}
237
238		static const AVFilterPad blackdetect_inputs[] = {
239		{
240		.name = "default",
241		.type = AVMEDIA_TYPE_VIDEO,
242		.config_props = config_input,
243		.filter_frame = filter_frame,
244		},
245		};
246
247		const AVFilter ff_vf_blackdetect = {
248		.name = "blackdetect",
249		.description = NULL_IF_CONFIG_SMALL("Detect video intervals that are (almost) black."),
250		.priv_size = sizeof(BlackDetectContext),
251		FILTER_INPUTS(blackdetect_inputs),
252		FILTER_OUTPUTS(ff_video_default_filterpad),
253		FILTER_PIXFMTS_ARRAY(pix_fmts),
254		.uninit = uninit,
255		.priv_class = &blackdetect_class,
256		.flags = AVFILTER_FLAG_SLICE_THREADS \| AVFILTER_FLAG_METADATA_ONLY,
257		};
258

Function (Line)	Call count	Block coverage
black_counter (line 136)	not called	0.0%
check_black_end (line 123)	not called	0.0%
config_input (line 101)	not called	0.0%
filter_frame (line 174)	not called	0.0%
uninit (line 225)	not called	0.0%