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| author | Nicolas Dufresne <nicolas.dufresne@collabora.com> | 2017-07-18 11:28:37 -0400 |
|---|---|---|
| committer | Nicolas Dufresne <nicolas.dufresne@collabora.com> | 2017-07-18 13:11:17 -0400 |
| commit | 4f7fefe7efa411e828e7655b8f406f4462d97d81 (patch) | |
| tree | 02c0c4595ecf7d3da2e702f99955431b8da6938d | |
| parent | 620f6dc1ef51779c251eeb1de8beb2a8c0db0773 (diff) | |
| download | gstreamer-plugins-good-4f7fefe7efa411e828e7655b8f406f4462d97d81.tar.gz | |
v4l2: Fix 4K colorimetry
Since 1.6, the transfer function for BT2020 has been changed from BT709
to BT2020_12. It's the same function, but with more precision. As a side
effect, the V4L2 colorpsace didn't match GStreamer colorspace. When
GStreamer ended up making a guess, it would not match anything supported
by V4L2 anymore. This this by using BT2020_12 for BT2020 colorspace and
BT2020 transfer function in replacement of BT709 whenever a 4K
resolution is detected.
| -rw-r--r-- | sys/v4l2/gstv4l2object.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c index ac06b1fbd..6334a61c0 100644 --- a/sys/v4l2/gstv4l2object.c +++ b/sys/v4l2/gstv4l2object.c @@ -1964,7 +1964,7 @@ gst_v4l2_object_get_colorspace (struct v4l2_format *fmt, case V4L2_COLORSPACE_BT2020: cinfo->range = GST_VIDEO_COLOR_RANGE_16_235; cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020; - cinfo->transfer = GST_VIDEO_TRANSFER_BT709; + cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12; cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020; break; case V4L2_COLORSPACE_SMPTE240M: @@ -2066,7 +2066,10 @@ gst_v4l2_object_get_colorspace (struct v4l2_format *fmt, switch (transfer) { case V4L2_XFER_FUNC_709: - cinfo->transfer = GST_VIDEO_TRANSFER_BT709; + if (fmt->fmt.pix.height > 2160) + cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12; + else + cinfo->transfer = GST_VIDEO_TRANSFER_BT709; break; case V4L2_XFER_FUNC_SRGB: cinfo->transfer = GST_VIDEO_TRANSFER_SRGB; |