mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-29 22:40:23 +00:00
135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/*
|
|
* 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
|
|
* bounding box detection filter
|
|
*/
|
|
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "libavutil/timestamp.h"
|
|
#include "avfilter.h"
|
|
#include "bbox.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct {
|
|
const AVClass *class;
|
|
int min_val;
|
|
} BBoxContext;
|
|
|
|
#define OFFSET(x) offsetof(BBoxContext, x)
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
|
|
static const AVOption bbox_options[] = {
|
|
{ "min_val", "set minimum luminance value for bounding box", OFFSET(min_val), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 254, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(bbox);
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_YUV420P,
|
|
AV_PIX_FMT_YUV444P,
|
|
AV_PIX_FMT_YUV440P,
|
|
AV_PIX_FMT_YUV422P,
|
|
AV_PIX_FMT_YUV411P,
|
|
AV_PIX_FMT_NONE,
|
|
};
|
|
|
|
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
|
|
return 0;
|
|
}
|
|
|
|
#define SET_META(key, value) \
|
|
snprintf(buf, sizeof(buf), "%d", value); \
|
|
av_dict_set(metadata, key, buf, 0);
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
BBoxContext *bbox = ctx->priv;
|
|
FFBoundingBox box;
|
|
int has_bbox, w, h;
|
|
char buf[32];
|
|
|
|
has_bbox =
|
|
ff_calculate_bounding_box(&box,
|
|
frame->data[0], frame->linesize[0],
|
|
inlink->w, inlink->h, bbox->min_val);
|
|
w = box.x2 - box.x1 + 1;
|
|
h = box.y2 - box.y1 + 1;
|
|
|
|
av_log(ctx, AV_LOG_INFO,
|
|
"n:%"PRId64" pts:%s pts_time:%s", inlink->frame_count,
|
|
av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base));
|
|
|
|
if (has_bbox) {
|
|
AVDictionary **metadata = avpriv_frame_get_metadatap(frame);
|
|
|
|
SET_META("lavfi.bbox.x1", box.x1)
|
|
SET_META("lavfi.bbox.x2", box.x2)
|
|
SET_META("lavfi.bbox.y1", box.y1)
|
|
SET_META("lavfi.bbox.y2", box.y2)
|
|
SET_META("lavfi.bbox.w", w)
|
|
SET_META("lavfi.bbox.h", h)
|
|
|
|
av_log(ctx, AV_LOG_INFO,
|
|
" x1:%d x2:%d y1:%d y2:%d w:%d h:%d"
|
|
" crop=%d:%d:%d:%d drawbox=%d:%d:%d:%d",
|
|
box.x1, box.x2, box.y1, box.y2, w, h,
|
|
w, h, box.x1, box.y1, /* crop params */
|
|
box.x1, box.y1, w, h); /* drawbox params */
|
|
}
|
|
av_log(ctx, AV_LOG_INFO, "\n");
|
|
|
|
return ff_filter_frame(inlink->dst->outputs[0], frame);
|
|
}
|
|
|
|
static const AVFilterPad bbox_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad bbox_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_bbox = {
|
|
.name = "bbox",
|
|
.description = NULL_IF_CONFIG_SMALL("Compute bounding box for each frame."),
|
|
.priv_size = sizeof(BBoxContext),
|
|
.priv_class = &bbox_class,
|
|
.query_formats = query_formats,
|
|
.inputs = bbox_inputs,
|
|
.outputs = bbox_outputs,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
|
|
};
|