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157 lines
5.1 KiB
157 lines
5.1 KiB
/* |
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* Copyright (c) 2012 Stefano Sabatini |
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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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/** |
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* @file |
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* bounding box detection filter |
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*/ |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/timestamp.h" |
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#include "avfilter.h" |
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#include "bbox.h" |
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#include "filters.h" |
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typedef struct BBoxContext { |
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const AVClass *class; |
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int min_val; |
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int depth; |
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} BBoxContext; |
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#define OFFSET(x) offsetof(BBoxContext, 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 bbox_options[] = { |
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{ "min_val", "set minimum luminance value for bounding box", OFFSET(min_val), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, UINT16_MAX, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(bbox); |
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static const enum AVPixelFormat pix_fmts[] = { |
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, |
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AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, |
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AV_PIX_FMT_GRAY16, |
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, |
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, |
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, |
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, |
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AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_YUVJ411P, |
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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_YUV440P10, |
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12, |
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AV_PIX_FMT_YUV440P12, |
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14, |
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, |
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AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16, |
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AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16, |
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16, |
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AV_PIX_FMT_NONE, |
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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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FilterLink *inl = ff_filter_link(inlink); |
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AVFilterContext *ctx = inlink->dst; |
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BBoxContext *bbox = ctx->priv; |
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FFBoundingBox box; |
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int has_bbox, w, h; |
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has_bbox = |
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ff_calculate_bounding_box(&box, |
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frame->data[0], frame->linesize[0], |
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inlink->w, inlink->h, bbox->min_val, bbox->depth); |
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w = box.x2 - box.x1 + 1; |
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h = box.y2 - box.y1 + 1; |
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av_log(ctx, AV_LOG_INFO, |
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"n:%"PRId64" pts:%s pts_time:%s", inl->frame_count_out, |
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av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base)); |
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if (has_bbox) { |
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AVDictionary **metadata = &frame->metadata; |
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SET_META("lavfi.bbox.x1", box.x1) |
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SET_META("lavfi.bbox.x2", box.x2) |
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SET_META("lavfi.bbox.y1", box.y1) |
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SET_META("lavfi.bbox.y2", box.y2) |
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SET_META("lavfi.bbox.w", w) |
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SET_META("lavfi.bbox.h", h) |
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av_log(ctx, AV_LOG_INFO, |
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" x1:%d x2:%d y1:%d y2:%d w:%d h:%d" |
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" crop=%d:%d:%d:%d drawbox=%d:%d:%d:%d", |
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box.x1, box.x2, box.y1, box.y2, w, h, |
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w, h, box.x1, box.y1, /* crop params */ |
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box.x1, box.y1, w, h); /* drawbox params */ |
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} |
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av_log(ctx, AV_LOG_INFO, "\n"); |
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return ff_filter_frame(inlink->dst->outputs[0], frame); |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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BBoxContext *s = ctx->priv; |
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const AVPixFmtDescriptor *desc; |
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desc = av_pix_fmt_desc_get(outlink->format); |
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if (!desc) |
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return AVERROR_BUG; |
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s->depth = desc->comp[0].depth; |
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return 0; |
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} |
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static const AVFilterPad bbox_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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}, |
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}; |
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static const AVFilterPad bbox_outputs[] = { |
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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_output, |
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}, |
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}; |
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const AVFilter ff_vf_bbox = { |
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.name = "bbox", |
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.description = NULL_IF_CONFIG_SMALL("Compute bounding box for each frame."), |
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.priv_size = sizeof(BBoxContext), |
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.priv_class = &bbox_class, |
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FILTER_INPUTS(bbox_inputs), |
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FILTER_OUTPUTS(bbox_outputs), |
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FILTER_PIXFMTS_ARRAY(pix_fmts), |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_METADATA_ONLY, |
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.process_command = ff_filter_process_command, |
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};
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