From 92799ef7209bfd4c8eadb88c2c8f6fcba544b367 Mon Sep 17 00:00:00 2001 From: Sergey Dorodnicov Date: Wed, 12 Sep 2018 02:42:06 -0400 Subject: [PATCH] media: v4l: Add 4bpp packed depth confidence format CNF4 Adding new fourcc CNF4 for 4 bit-per-pixel packed depth confidence information provided by Intel RealSense cameras. Every two consecutive pixels are packed into a single byte. Signed-off-by: Sergey Dorodnicov Signed-off-by: Evgeni Raikhel Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- Documentation/media/uapi/v4l/depth-formats.rst | 1 + Documentation/media/uapi/v4l/pixfmt-cnf4.rst | 31 ++++++++++++++++++++++++++ drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/uapi/linux/videodev2.h | 1 + 4 files changed, 34 insertions(+) create mode 100644 Documentation/media/uapi/v4l/pixfmt-cnf4.rst diff --git a/Documentation/media/uapi/v4l/depth-formats.rst b/Documentation/media/uapi/v4l/depth-formats.rst index d1641e9..9533348 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 0000000..8f46929 --- /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) diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index e384142..363be5b 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1189,6 +1189,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; + case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 2a22383..2db1635 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -689,6 +689,7 @@ struct v4l2_pix_format { #define V4L2_PIX_FMT_MT21C v4l2_fourcc('M', 'T', '2', '1') /* Mediatek compressed block mode */ #define V4L2_PIX_FMT_INZI v4l2_fourcc('I', 'N', 'Z', 'I') /* Intel Planar Greyscale 10-bit and Depth 16-bit */ #define V4L2_PIX_FMT_SUNXI_TILED_NV12 v4l2_fourcc('S', 'T', '1', '2') /* Sunxi Tiled NV12 Format */ +#define V4L2_PIX_FMT_CNF4 v4l2_fourcc('C', 'N', 'F', '4') /* Intel 4-bit packed depth confidence information */ /* 10bit raw bayer packed, 32 bytes for every 25 pixels, last LSB 6 bits unused */ #define V4L2_PIX_FMT_IPU3_SBGGR10 v4l2_fourcc('i', 'p', '3', 'b') /* IPU3 packed 10-bit BGGR bayer */ -- 2.7.4