LCOV - code coverage report
Current view: top level - libavfilter - vf_bbox.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 26 0.0 %
Date: 2017-12-18 20:14:19 Functions: 0 2 0.0 %

          Line data    Source code
       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             :  * bounding box detection filter
      24             :  */
      25             : 
      26             : #include "libavutil/opt.h"
      27             : #include "libavutil/pixdesc.h"
      28             : #include "libavutil/timestamp.h"
      29             : #include "avfilter.h"
      30             : #include "bbox.h"
      31             : #include "internal.h"
      32             : 
      33             : typedef struct BBoxContext {
      34             :     const AVClass *class;
      35             :     int min_val;
      36             : } BBoxContext;
      37             : 
      38             : #define OFFSET(x) offsetof(BBoxContext, x)
      39             : #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
      40             : 
      41             : static const AVOption bbox_options[] = {
      42             :     { "min_val", "set minimum luminance value for bounding box", OFFSET(min_val), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 254, FLAGS },
      43             :     { NULL }
      44             : };
      45             : 
      46             : AVFILTER_DEFINE_CLASS(bbox);
      47             : 
      48           0 : static int query_formats(AVFilterContext *ctx)
      49             : {
      50             :     static const enum AVPixelFormat pix_fmts[] = {
      51             :         AV_PIX_FMT_YUV420P,
      52             :         AV_PIX_FMT_YUV444P,
      53             :         AV_PIX_FMT_YUV440P,
      54             :         AV_PIX_FMT_YUV422P,
      55             :         AV_PIX_FMT_YUV411P,
      56             :         AV_PIX_FMT_NONE,
      57             :     };
      58             : 
      59           0 :     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
      60           0 :     if (!fmts_list)
      61           0 :         return AVERROR(ENOMEM);
      62           0 :     return ff_set_common_formats(ctx, fmts_list);
      63             : }
      64             : 
      65             : #define SET_META(key, value) \
      66             :     av_dict_set_int(metadata, key, value, 0);
      67             : 
      68           0 : static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
      69             : {
      70           0 :     AVFilterContext *ctx = inlink->dst;
      71           0 :     BBoxContext *bbox = ctx->priv;
      72             :     FFBoundingBox box;
      73             :     int has_bbox, w, h;
      74             : 
      75           0 :     has_bbox =
      76           0 :         ff_calculate_bounding_box(&box,
      77           0 :                                   frame->data[0], frame->linesize[0],
      78             :                                   inlink->w, inlink->h, bbox->min_val);
      79           0 :     w = box.x2 - box.x1 + 1;
      80           0 :     h = box.y2 - box.y1 + 1;
      81             : 
      82           0 :     av_log(ctx, AV_LOG_INFO,
      83             :            "n:%"PRId64" pts:%s pts_time:%s", inlink->frame_count_out,
      84           0 :            av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base));
      85             : 
      86           0 :     if (has_bbox) {
      87           0 :         AVDictionary **metadata = &frame->metadata;
      88             : 
      89           0 :         SET_META("lavfi.bbox.x1", box.x1)
      90           0 :         SET_META("lavfi.bbox.x2", box.x2)
      91           0 :         SET_META("lavfi.bbox.y1", box.y1)
      92           0 :         SET_META("lavfi.bbox.y2", box.y2)
      93           0 :         SET_META("lavfi.bbox.w",  w)
      94           0 :         SET_META("lavfi.bbox.h",  h)
      95             : 
      96           0 :         av_log(ctx, AV_LOG_INFO,
      97             :                " x1:%d x2:%d y1:%d y2:%d w:%d h:%d"
      98             :                " crop=%d:%d:%d:%d drawbox=%d:%d:%d:%d",
      99             :                box.x1, box.x2, box.y1, box.y2, w, h,
     100             :                w, h, box.x1, box.y1,    /* crop params */
     101             :                box.x1, box.y1, w, h);   /* drawbox params */
     102             :     }
     103           0 :     av_log(ctx, AV_LOG_INFO, "\n");
     104             : 
     105           0 :     return ff_filter_frame(inlink->dst->outputs[0], frame);
     106             : }
     107             : 
     108             : static const AVFilterPad bbox_inputs[] = {
     109             :     {
     110             :         .name         = "default",
     111             :         .type         = AVMEDIA_TYPE_VIDEO,
     112             :         .filter_frame = filter_frame,
     113             :     },
     114             :     { NULL }
     115             : };
     116             : 
     117             : static const AVFilterPad bbox_outputs[] = {
     118             :     {
     119             :         .name = "default",
     120             :         .type = AVMEDIA_TYPE_VIDEO,
     121             :     },
     122             :     { NULL }
     123             : };
     124             : 
     125             : AVFilter ff_vf_bbox = {
     126             :     .name          = "bbox",
     127             :     .description   = NULL_IF_CONFIG_SMALL("Compute bounding box for each frame."),
     128             :     .priv_size     = sizeof(BBoxContext),
     129             :     .priv_class    = &bbox_class,
     130             :     .query_formats = query_formats,
     131             :     .inputs        = bbox_inputs,
     132             :     .outputs       = bbox_outputs,
     133             :     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
     134             : };

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