059b1c5b15
SPDX v3.10 gained support for GFDL-1.1 with no invariant sections: https://spdx.org/licenses/GFDL-1.1-no-invariants-or-later.html So, remove the license text, replacing them by this new SPDX license. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
169 lines
4.0 KiB
ReStructuredText
169 lines
4.0 KiB
ReStructuredText
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
|
|
|
|
.. _v4l2-meta-fmt-vsp1-hgo:
|
|
|
|
*******************************
|
|
V4L2_META_FMT_VSP1_HGO ('VSPH')
|
|
*******************************
|
|
|
|
Renesas R-Car VSP1 1-D Histogram Data
|
|
|
|
|
|
Description
|
|
===========
|
|
|
|
This format describes histogram data generated by the Renesas R-Car VSP1 1-D
|
|
Histogram (HGO) engine.
|
|
|
|
The VSP1 HGO is a histogram computation engine that can operate on RGB, YCrCb
|
|
or HSV data. It operates on a possibly cropped and subsampled input image and
|
|
computes the minimum, maximum and sum of all pixels as well as per-channel
|
|
histograms.
|
|
|
|
The HGO can compute histograms independently per channel, on the maximum of the
|
|
three channels (RGB data only) or on the Y channel only (YCbCr only). It can
|
|
additionally output the histogram with 64 or 256 bins, resulting in four
|
|
possible modes of operation.
|
|
|
|
- In *64 bins normal mode*, the HGO operates on the three channels independently
|
|
to compute three 64-bins histograms. RGB, YCbCr and HSV image formats are
|
|
supported.
|
|
- In *64 bins maximum mode*, the HGO operates on the maximum of the (R, G, B)
|
|
channels to compute a single 64-bins histogram. Only the RGB image format is
|
|
supported.
|
|
- In *256 bins normal mode*, the HGO operates on the Y channel to compute a
|
|
single 256-bins histogram. Only the YCbCr image format is supported.
|
|
- In *256 bins maximum mode*, the HGO operates on the maximum of the (R, G, B)
|
|
channels to compute a single 256-bins histogram. Only the RGB image format is
|
|
supported.
|
|
|
|
**Byte Order.**
|
|
All data is stored in memory in little endian format. Each cell in the tables
|
|
contains one byte.
|
|
|
|
.. flat-table:: VSP1 HGO Data - 64 Bins, Normal Mode (792 bytes)
|
|
:header-rows: 2
|
|
:stub-columns: 0
|
|
|
|
* - Offset
|
|
- :cspan:`4` Memory
|
|
* -
|
|
- [31:24]
|
|
- [23:16]
|
|
- [15:8]
|
|
- [7:0]
|
|
* - 0
|
|
-
|
|
- R/Cr/H max [7:0]
|
|
-
|
|
- R/Cr/H min [7:0]
|
|
* - 4
|
|
-
|
|
- G/Y/S max [7:0]
|
|
-
|
|
- G/Y/S min [7:0]
|
|
* - 8
|
|
-
|
|
- B/Cb/V max [7:0]
|
|
-
|
|
- B/Cb/V min [7:0]
|
|
* - 12
|
|
- :cspan:`4` R/Cr/H sum [31:0]
|
|
* - 16
|
|
- :cspan:`4` G/Y/S sum [31:0]
|
|
* - 20
|
|
- :cspan:`4` B/Cb/V sum [31:0]
|
|
* - 24
|
|
- :cspan:`4` R/Cr/H bin 0 [31:0]
|
|
* -
|
|
- :cspan:`4` ...
|
|
* - 276
|
|
- :cspan:`4` R/Cr/H bin 63 [31:0]
|
|
* - 280
|
|
- :cspan:`4` G/Y/S bin 0 [31:0]
|
|
* -
|
|
- :cspan:`4` ...
|
|
* - 532
|
|
- :cspan:`4` G/Y/S bin 63 [31:0]
|
|
* - 536
|
|
- :cspan:`4` B/Cb/V bin 0 [31:0]
|
|
* -
|
|
- :cspan:`4` ...
|
|
* - 788
|
|
- :cspan:`4` B/Cb/V bin 63 [31:0]
|
|
|
|
.. flat-table:: VSP1 HGO Data - 64 Bins, Max Mode (264 bytes)
|
|
:header-rows: 2
|
|
:stub-columns: 0
|
|
|
|
* - Offset
|
|
- :cspan:`4` Memory
|
|
* -
|
|
- [31:24]
|
|
- [23:16]
|
|
- [15:8]
|
|
- [7:0]
|
|
* - 0
|
|
-
|
|
- max(R,G,B) max [7:0]
|
|
-
|
|
- max(R,G,B) min [7:0]
|
|
* - 4
|
|
- :cspan:`4` max(R,G,B) sum [31:0]
|
|
* - 8
|
|
- :cspan:`4` max(R,G,B) bin 0 [31:0]
|
|
* -
|
|
- :cspan:`4` ...
|
|
* - 260
|
|
- :cspan:`4` max(R,G,B) bin 63 [31:0]
|
|
|
|
.. flat-table:: VSP1 HGO Data - 256 Bins, Normal Mode (1032 bytes)
|
|
:header-rows: 2
|
|
:stub-columns: 0
|
|
|
|
* - Offset
|
|
- :cspan:`4` Memory
|
|
* -
|
|
- [31:24]
|
|
- [23:16]
|
|
- [15:8]
|
|
- [7:0]
|
|
* - 0
|
|
-
|
|
- Y max [7:0]
|
|
-
|
|
- Y min [7:0]
|
|
* - 4
|
|
- :cspan:`4` Y sum [31:0]
|
|
* - 8
|
|
- :cspan:`4` Y bin 0 [31:0]
|
|
* -
|
|
- :cspan:`4` ...
|
|
* - 1028
|
|
- :cspan:`4` Y bin 255 [31:0]
|
|
|
|
.. flat-table:: VSP1 HGO Data - 256 Bins, Max Mode (1032 bytes)
|
|
:header-rows: 2
|
|
:stub-columns: 0
|
|
|
|
* - Offset
|
|
- :cspan:`4` Memory
|
|
* -
|
|
- [31:24]
|
|
- [23:16]
|
|
- [15:8]
|
|
- [7:0]
|
|
* - 0
|
|
-
|
|
- max(R,G,B) max [7:0]
|
|
-
|
|
- max(R,G,B) min [7:0]
|
|
* - 4
|
|
- :cspan:`4` max(R,G,B) sum [31:0]
|
|
* - 8
|
|
- :cspan:`4` max(R,G,B) bin 0 [31:0]
|
|
* -
|
|
- :cspan:`4` ...
|
|
* - 1028
|
|
- :cspan:`4` max(R,G,B) bin 255 [31:0]
|