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lavfi/cropdetect: export cropdetect info to frame metadata 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-07-05 15:07:20 +00:00
parent 4e8d6b315c
commit 9dd1447788
1 changed files with 17 additions and 0 deletions
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17
libavfilter/vf_cropdetect.c
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@ -112,15 +112,23 @@ static int config_input(AVFilterLink *inlink)
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;
CropDetectContext *s = ctx->priv;
int bpp = s->max_pixsteps[0];
int w, h, x, y, shrink_by;
AVDictionary **metadata;
char buf[32];
// ignore first 2 frames - they may be empty
if (++s->frame_nb > 0) {
metadata = avpriv_frame_get_metadatap(frame);
// Reset the crop area every reset_count frames, if reset_count is > 0
if (s->reset_count > 0 && s->frame_nb > s->reset_count) {
s->x1 = frame->width - 1;
@ -181,6 +189,15 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
h -= shrink_by;
y += (shrink_by/2 + 1) & ~1;
SET_META("lavfi.cropdetect.x1", s->x1);
SET_META("lavfi.cropdetect.x2", s->x2);
SET_META("lavfi.cropdetect.y1", s->y1);
SET_META("lavfi.cropdetect.y2", s->y2);
SET_META("lavfi.cropdetect.w", w);
SET_META("lavfi.cropdetect.h", h);
SET_META("lavfi.cropdetect.x", x);
SET_META("lavfi.cropdetect.y", y);
av_log(ctx, AV_LOG_INFO,
"x1:%d x2:%d y1:%d y2:%d w:%d h:%d x:%d y:%d pts:%"PRId64" t:%f crop=%d:%d:%d:%d\n",
s->x1, s->x2, s->y1, s->y2, w, h, x, y, frame->pts,