AV_PIX_FMT_GRAY8/16 are considered YUV formats, and the color_range is
not set - so the API user will have to assume limitted range. (Unless
the API user adds a special-case for the PNG decoder.)
Just export the correct range - full range.
---
libavcodec/pngdec.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 1f8a77b..72d75fb 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -633,6 +633,8 @@ static int decode_idat_chunk(AVCodecContext *avctx,
PNGDecContext *s,
return AVERROR_INVALIDDATA;
}
+ avctx->color_range = AVCOL_RANGE_JPEG;
+
if ((ret = ff_thread_get_buffer(avctx, &s->picture,
AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
ff_thread_finish_setup(avctx);
--
2.1.4
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