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-rw-r--r--Documentation/media/uapi/v4l/depth-formats.rst1
-rw-r--r--Documentation/media/uapi/v4l/pixfmt-cnf4.rst31
2 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/depth-formats.rst b/Documentation/media/uapi/v4l/depth-formats.rst
index d1641e9687a6..9533348691d9 100644
--- a/Documentation/media/uapi/v4l/depth-formats.rst
+++ b/Documentation/media/uapi/v4l/depth-formats.rst
@@ -14,3 +14,4 @@ Depth data provides distance to points, mapped onto the image plane
pixfmt-inzi
pixfmt-z16
+ pixfmt-cnf4
diff --git a/Documentation/media/uapi/v4l/pixfmt-cnf4.rst b/Documentation/media/uapi/v4l/pixfmt-cnf4.rst
new file mode 100644
index 000000000000..8f469290c304
--- /dev/null
+++ b/Documentation/media/uapi/v4l/pixfmt-cnf4.rst
@@ -0,0 +1,31 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _V4L2-PIX-FMT-CNF4:
+
+******************************
+V4L2_PIX_FMT_CNF4 ('CNF4')
+******************************
+
+Depth sensor confidence information as a 4 bits per pixel packed array
+
+Description
+===========
+
+Proprietary format used by Intel RealSense Depth cameras containing depth
+confidence information in range 0-15 with 0 indicating that the sensor was
+unable to resolve any signal and 15 indicating maximum level of confidence for
+the specific sensor (actual error margins might change from sensor to sensor).
+
+Every two consecutive pixels are packed into a single byte.
+Bits 0-3 of byte n refer to confidence value of depth pixel 2*n,
+bits 4-7 to confidence value of depth pixel 2*n+1.
+
+**Bit-packed representation.**
+
+.. flat-table::
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 64 64
+
+ * - Y'\ :sub:`01[3:0]`\ (bits 7--4) Y'\ :sub:`00[3:0]`\ (bits 3--0)
+ - Y'\ :sub:`03[3:0]`\ (bits 7--4) Y'\ :sub:`02[3:0]`\ (bits 3--0)