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v4l2object: handle GST_VIDEO_TRANSFER_BT601

Browse source 
V4L2 makes no difference between the BT.601 and BT.709 transfer
functions [1], but GStreamer does since 1.18 [2].

Adapt gst_v4l2_object_get_colorspace() and
gst_v4l2_object_set_format_full().

[1] https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/colorspaces-details.html#colorspace-smpte-170m-v4l2-colorspace-smpte170m
[2] https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/724

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/856>
This commit is contained in:
Philipp Zabel 2021-01-18 15:54:43 +01:00 committed by GStreamer Marge Bot
parent f2d909eb4e
commit 78dec1e403
1 changed files with 4 additions and 1 deletions
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5
sys/v4l2/gstv4l2object.c
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@ -2054,7 +2054,7 @@ gst_v4l2_object_get_colorspace (GstV4l2Object * v4l2object,
case V4L2_COLORSPACE_SMPTE170M:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
cinfo->transfer = GST_VIDEO_TRANSFER_BT601;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M;
break;
case V4L2_COLORSPACE_REC709:
@ -2183,6 +2183,8 @@ gst_v4l2_object_get_colorspace (GstV4l2Object * v4l2object,
case V4L2_XFER_FUNC_709:
if (colorspace == V4L2_COLORSPACE_BT2020 && fmt->fmt.pix.height >= 2160)
cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
else if (colorspace == V4L2_COLORSPACE_SMPTE170M)
cinfo->transfer = GST_VIDEO_TRANSFER_BT601;
else
cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
@ -3589,6 +3591,7 @@ gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
case GST_VIDEO_TRANSFER_GAMMA10:
transfer = V4L2_XFER_FUNC_NONE;
break;
case GST_VIDEO_TRANSFER_BT601:
case GST_VIDEO_TRANSFER_BT2020_12:
case GST_VIDEO_TRANSFER_BT2020_10:
case GST_VIDEO_TRANSFER_BT709: