blob: 86054b2483ac628464f034c35eb5adf727b95db1
| 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 { |
| 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 | 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 | AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| 60 | if (!fmts_list) |
| 61 | return AVERROR(ENOMEM); |
| 62 | 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 | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
| 69 | { |
| 70 | AVFilterContext *ctx = inlink->dst; |
| 71 | BBoxContext *bbox = ctx->priv; |
| 72 | FFBoundingBox box; |
| 73 | int has_bbox, w, h; |
| 74 | |
| 75 | has_bbox = |
| 76 | ff_calculate_bounding_box(&box, |
| 77 | frame->data[0], frame->linesize[0], |
| 78 | inlink->w, inlink->h, bbox->min_val); |
| 79 | w = box.x2 - box.x1 + 1; |
| 80 | h = box.y2 - box.y1 + 1; |
| 81 | |
| 82 | av_log(ctx, AV_LOG_INFO, |
| 83 | "n:%"PRId64" pts:%s pts_time:%s", inlink->frame_count_out, |
| 84 | av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base)); |
| 85 | |
| 86 | if (has_bbox) { |
| 87 | AVDictionary **metadata = avpriv_frame_get_metadatap(frame); |
| 88 | |
| 89 | SET_META("lavfi.bbox.x1", box.x1) |
| 90 | SET_META("lavfi.bbox.x2", box.x2) |
| 91 | SET_META("lavfi.bbox.y1", box.y1) |
| 92 | SET_META("lavfi.bbox.y2", box.y2) |
| 93 | SET_META("lavfi.bbox.w", w) |
| 94 | SET_META("lavfi.bbox.h", h) |
| 95 | |
| 96 | 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 | av_log(ctx, AV_LOG_INFO, "\n"); |
| 104 | |
| 105 | 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 | }; |
| 135 |