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avfilter/vf_delogo: add auto set the area inside of the frame

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when the area outside of the frame, then use expr should
give user warning message and auto set to the area inside of the frame.

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
This commit is contained in:
Steven Liu 2019-09-04 23:53:05 +08:00
parent 9f0b9ae8bd
commit aea82dfe22
1 changed files with 15 additions and 0 deletions
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15
libavfilter/vf_delogo.c
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@ -327,6 +327,21 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
s->w = av_expr_eval(s->w_pexpr, s->var_values, s);
s->h = av_expr_eval(s->h_pexpr, s->var_values, s);
if (s->x + (s->band - 1) <= 0 || s->x + s->w - (s->band*2 - 2) > inlink->w ||
s->y + (s->band - 1) <= 0 || s->y + s->h - (s->band*2 - 2) > inlink->h) {
av_log(s, AV_LOG_WARNING, "Logo area is outside of the frame,"
" auto set the area inside of the frame\n");
}
if (s->x + (s->band - 1) <= 0)
s->x = 1 + s->band;
if (s->y + (s->band - 1) <= 0)
s->y = 1 + s->band;
if (s->x + s->w - (s->band*2 - 2) > inlink->w)
s->w = inlink->w - s->x - (s->band*2 - 2);
if (s->y + s->h - (s->band*2 - 2) > inlink->h)
s->h = inlink->h - s->y - (s->band*2 - 2);
ret = config_input(inlink);
if (ret < 0) {
av_frame_free(&in);