From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pg1-f194.google.com ([209.85.215.194]:39192 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726452AbeIFMTZ (ORCPT ); Thu, 6 Sep 2018 08:19:25 -0400 Received: by mail-pg1-f194.google.com with SMTP id i190-v6so4783994pgc.6 for ; Thu, 06 Sep 2018 00:45:17 -0700 (PDT) From: dorodnic@gmail.com To: linux-media@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, evgeni.raikhel@intel.com, Sergey Dorodnicov Subject: [PATCH 1/2] CNF4 fourcc for 4 bit-per-pixel packed confidence information Date: Thu, 6 Sep 2018 03:51:06 -0400 Message-Id: <1536220267-22347-2-git-send-email-sergey.dorodnicov@intel.com> In-Reply-To: <1536220267-22347-1-git-send-email-sergey.dorodnicov@intel.com> References: <1536220267-22347-1-git-send-email-sergey.dorodnicov@intel.com> Sender: linux-media-owner@vger.kernel.org List-ID: From: Sergey Dorodnicov Adding new fourcc CNF4 for 4 bit-per-pixel packed confidence information provided by Intel RealSense depth cameras. Every two consecutive pixels are packed into a single byte (little-endian). Signed-off-by: Sergey Dorodnicov Signed-off-by: Evgeni Raikhel --- Documentation/media/uapi/v4l/depth-formats.rst | 1 + Documentation/media/uapi/v4l/pixfmt-cnf4.rst | 30 ++++++++++++++++++++++++++ drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/uapi/linux/videodev2.h | 1 + 4 files changed, 33 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..d24fc1a --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-cnf4.rst @@ -0,0 +1,30 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _V4L2-PIX-FMT-CNF4: + +****************************** +V4L2_PIX_FMT_CNF4 ('CNF4') +****************************** + +Sensor confidence information as a 4 bits per pixel packed array + +Description +=========== + +Proprietary format used by Intel RealSense Depth cameras containing sensor +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 (bit order is +little-endian). + +**Bit-packed representation.** + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 64 64 + + * - Y'\ :sub:`01[3:0]`\ (bits 3--0) Y'\ :sub:`00[3:0]`\ (bits 7--4) + - Y'\ :sub:`03[3:0]`\ (bits 3--0) Y'\ :sub:`02[3:0]`\ (bits 7--4) diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 54afc9c..eff296d 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 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 5d1a368..a47f603 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -676,6 +676,7 @@ struct v4l2_pix_format { #define V4L2_PIX_FMT_Z16 v4l2_fourcc('Z', '1', '6', ' ') /* Depth data 16-bit */ #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_CNF4 v4l2_fourcc('C', 'N', 'F', '4') /* Intel 4-bit packed 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