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v4l2object: SRGB colorspace is documented limited-range

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Split JPEG and SRGB so that we can follow the specified difference. The
SRGB definition in V4L2 does not follow the standard, and is document
so. This is also why JPEG colorspace exists.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3952>
This commit is contained in:
Nicolas Dufresne 2024-07-29 14:39:06 -04:00 committed by GStreamer Marge Bot
parent 20eb14b85b
commit 1ddb8797b5
1 changed files with 15 additions and 6 deletions
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21
subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
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@ -2280,6 +2280,11 @@ gst_v4l2_object_get_colorspace (GstV4l2Object * v4l2object,
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
break;
case V4L2_COLORSPACE_SRGB:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
break;
case V4L2_COLORSPACE_JPEG:
cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
@ -3821,12 +3826,16 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
/* We first pick the main colorspace from the primaries */
switch (info.colorimetry.primaries) {
case GST_VIDEO_COLOR_PRIMARIES_BT709:
/* There is two colorspaces using these primaries, use the range to
* differentiate */
if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235)
colorspace = V4L2_COLORSPACE_REC709;
else
colorspace = V4L2_COLORSPACE_SRGB;
/* There is three colorspaces using these primaries, use the range
* and format type to differentiate them */
if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235) {
if (GST_VIDEO_INFO_IS_RGB (&info))
colorspace = V4L2_COLORSPACE_SRGB;
else
colorspace = V4L2_COLORSPACE_REC709;
} else {
colorspace = V4L2_COLORSPACE_JPEG;
}
break;
case GST_VIDEO_COLOR_PRIMARIES_BT2020:
colorspace = V4L2_COLORSPACE_BT2020;