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v4l2object: set colorspace in caps for capture devices

Browse source 
This information is set by the driver for a capture device, and so could
be forwarded to pipeline by setting the colorimetry in caps.

https://bugzilla.gnome.org/show_bug.cgi?id=743186
This commit is contained in:
Aurélien Zanelli 2015-01-19 15:29:24 +01:00 committed by Nicolas Dufresne
parent 600027a1ee
commit 7a1613b9e1
1 changed files with 68 additions and 0 deletions
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68
sys/v4l2/gstv4l2object.c
View file

@ -1663,6 +1663,37 @@ gst_v4l2_object_get_interlace_mode (enum v4l2_field field,
}
}
static gboolean
gst_v4l2_object_get_colorspace (enum v4l2_colorspace colorspace,
GstVideoColorimetry * cinfo)
{
gboolean ret = FALSE;
switch (colorspace) {
case V4L2_COLORSPACE_SMPTE170M:
ret = gst_video_colorimetry_from_string (cinfo,
GST_VIDEO_COLORIMETRY_BT601);
break;
case V4L2_COLORSPACE_REC709:
ret = gst_video_colorimetry_from_string (cinfo,
GST_VIDEO_COLORIMETRY_BT709);
break;
case V4L2_COLORSPACE_SMPTE240M:
ret = gst_video_colorimetry_from_string (cinfo,
GST_VIDEO_COLORIMETRY_SMPTE240M);
break;
case V4L2_COLORSPACE_SRGB:
ret = gst_video_colorimetry_from_string (cinfo,
GST_VIDEO_COLORIMETRY_SRGB);
break;
default:
GST_DEBUG ("Unknown enum v4l2_colorspace %d", colorspace);
ret = FALSE;
break;
}
return ret;
}
static int
gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
struct v4l2_format *try_fmt)
@ -1753,6 +1784,39 @@ gst_v4l2_object_add_interlace_mode (GstV4l2Object * v4l2object,
return;
}
static void
gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
guint32 width, guint32 height, guint32 pixelformat)
{
struct v4l2_format fmt;
GValue colorimetry = G_VALUE_INIT;
GstVideoColorimetry cinfo;
memset (&fmt, 0, sizeof (fmt));
fmt.type = v4l2object->type;
fmt.fmt.pix.width = width;
fmt.fmt.pix.height = height;
fmt.fmt.pix.pixelformat = pixelformat;
if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
enum v4l2_colorspace colorspace;
if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
colorspace = fmt.fmt.pix_mp.colorspace;
else
colorspace = fmt.fmt.pix.colorspace;
if (gst_v4l2_object_get_colorspace (colorspace, &cinfo)) {
g_value_init (&colorimetry, G_TYPE_STRING);
g_value_take_string (&colorimetry,
gst_video_colorimetry_to_string (&cinfo));
gst_structure_take_value (s, "colorimetry", &colorimetry);
}
}
return;
}
/* The frame interval enumeration code first appeared in Linux 2.6.19. */
static GstStructure *
gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
@ -1925,6 +1989,7 @@ return_data:
gst_v4l2_object_add_aspect_ratio (v4l2object, s);
gst_v4l2_object_add_interlace_mode (v4l2object, s, width, height,
pixelformat);
gst_v4l2_object_add_colorspace (v4l2object, s, width, height, pixelformat);
if (G_IS_VALUE (&rates)) {
gst_v4l2src_value_simplify (&rates);
@ -2248,6 +2313,9 @@ default_frame_sizes:
gst_v4l2_object_add_interlace_mode (v4l2object, tmp, max_w, max_h,
pixelformat);
gst_v4l2_object_add_aspect_ratio (v4l2object, tmp);
/* We could consider to check colorspace for min too, in case it depends on
* the size. But in this case, min and max could not be enough */
gst_v4l2_object_add_colorspace (v4l2object, tmp, max_w, max_h, pixelformat);
gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
return ret;