avfilter/vf_alphamerge: warn if input not full range

Alpha planes must always be full range, so complain loudly if fed limited range grayscale input.

Niklas Haas committed 3 years ago

Commit ea955701 parent b7284f21 file · +6 −0Browse files

Showing the changes to libavfilter (1 of 1 file). Show all

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@@ -60,6 +60,12 @@ static int do_alphamerge(FFFrameSync *fs) · 59 unmodified lines
60	60	if (!alpha_buf)
61	61	return ff_filter_frame(ctx->outputs[0], main_buf);
62	62
	63	+ if (alpha_buf->color_range == AVCOL_RANGE_MPEG) {
	64	+ av_log(ctx, AV_LOG_WARNING, "alpha plane color range tagged as %s, "
	65	+ "output will be wrong!\n",
	66	+ av_color_range_name(alpha_buf->color_range));
	67	+ }
	68	+
63	69	if (s->is_packed_rgb) {
64	70	int x, y;
65	71	uint8_t pin, pout;

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