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v4l2: fix colorimetry for NV12

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Replicate V4L2_MAP_QUANTIZATION_DEFAULT macro behavior.
At #v4l it was described that documentation might be wrong and that
we should trust this macro instead.

https://bugzilla.gnome.org/show_bug.cgi?id=762529
This commit is contained in:
Josep Torra 2016-03-04 15:09:45 +01:00 committed by Nicolas Dufresne
parent 49be64e571
commit c65b66432e
1 changed files with 13 additions and 4 deletions
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17
sys/v4l2/gstv4l2object.c
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@ -1878,7 +1878,7 @@ gst_v4l2_object_get_interlace_mode (enum v4l2_field field,
static gboolean
gst_v4l2_object_get_colorspace (enum v4l2_colorspace colorspace,
enum v4l2_quantization range, enum v4l2_ycbcr_encoding matrix,
enum v4l2_xfer_func transfer, GstVideoColorimetry * cinfo)
enum v4l2_xfer_func transfer, gboolean is_rgb, GstVideoColorimetry * cinfo)
{
gboolean ret = TRUE;
@ -1958,7 +1958,15 @@ gst_v4l2_object_get_colorspace (enum v4l2_colorspace colorspace,
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
break;
case V4L2_QUANTIZATION_DEFAULT:
/* nothing, just use defaults for colorspace */
/* replicated V4L2_MAP_QUANTIZATION_DEFAULT macro behavior */
if (is_rgb && colorspace == V4L2_COLORSPACE_BT2020)
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
else if (is_rgb || matrix == V4L2_YCBCR_ENC_XV601
|| matrix == V4L2_YCBCR_ENC_XV709
|| colorspace == V4L2_COLORSPACE_JPEG)
cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
else
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
break;
default:
GST_WARNING ("Unknown enum v4l2_quantization value %d", range);
@ -2138,6 +2146,7 @@ gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
enum v4l2_quantization range;
enum v4l2_ycbcr_encoding matrix;
enum v4l2_xfer_func transfer;
gboolean is_rgb = gst_v4l2_object_v4l2fourcc_is_rgb (pixelformat);
if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type)) {
colorspace = fmt.fmt.pix_mp.colorspace;
@ -2152,11 +2161,11 @@ gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
}
if (gst_v4l2_object_get_colorspace (colorspace, range, matrix, transfer,
&cinfo)) {
is_rgb, &cinfo)) {
/* Set identity matrix for R'G'B' formats to avoid creating
* confusion. This though is cosmetic as it's now properly ignored by
* the video info API and videoconvert. */
if (gst_v4l2_object_v4l2fourcc_is_rgb (pixelformat))
if (is_rgb)
cinfo.matrix = GST_VIDEO_COLOR_MATRIX_RGB;
g_value_init (&colorimetry, G_TYPE_STRING);