linux.git/include/uapi/linux/v4l2-controls.h, branch v5.7-rc2

media: atmel: atmel-isc-base: expose white balance as v4l2 controls

2020-02-24T15:12:28+00:00

This exposes the white balance configuration of the ISC as v4l2 controls
into userspace.
There are 8 controls available:
4 gain controls, sliders, for each of the BAYER components: R, B, GR, GB.
These gains are multipliers for each component, in format unsigned 0:4:9
with a default value of 512 (1.0 multiplier).
4 offset controls, sliders, for each of the BAYER components: R, B, GR, GB.
These offsets are added/substracted from each component, in format signed
1:12:0 with a default value of 0 (+/- 0)

To expose this to userspace, added 8 custom controls, in an auto cluster.

To summarize the functionality:
The auto cluster switch is the auto white balance control, and it works
like this:
AWB == 1: autowhitebalance is on, the do_white_balance button is inactive,
the gains/offsets are inactive, but volatile and readable.
Thus, the results of the whitebalance algorithm are available to userspace
to read at any time.
AWB == 0: autowhitebalance is off, cluster is in manual mode, user can
configure the gain/offsets directly. More than that, if the
do_white_balance button is pressed, the driver will perform
one-time-adjustment, (preferably with color checker card) and the userspace
can read again the new values.

With this feature, the userspace can save the coefficients and reinstall
them for example after reboot or reprobing the driver.

[hverkuil: fix checkpatch warning]
[hverkuil: minor spacing adjustments in the functionality description]

Signed-off-by: Eugen Hristev 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: add V4L2_CID_UNIT_CELL_SIZE control

2019-10-10T14:37:26+00:00

This control returns the unit cell size in nanometres. The struct provides
the width and the height in separated fields to take into consideration
asymmetric pixels and/or hardware binning.
This control is required for automatic calibration of sensors/cameras.

Reviewed-by: Philipp Zabel 
Signed-off-by: Ricardo Ribalda Delgado 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: v4l2-ctrl: add MPEG-2 profile and level controls

2019-05-29T10:19:12+00:00

Add MPEG-2 CID definitions for profiles and levels defined in ITU-T Rec.
H.262.

Signed-off-by: Philipp Zabel 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: coda/venus/s5p_mfc: fix control typo

2019-05-28T16:07:22+00:00

These two slice modes used by the V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE
control had a silly typo:

V4L2_MPEG_VIDEO_MULTI_SICE_MODE_MAX_MB
V4L2_MPEG_VIDEO_MULTI_SICE_MODE_MAX_BYTES

SICE should be SLICE.

Rename these enum values, keeping the old ones (under #ifndef __KERNEL__)
for backwards compatibility reasons.

Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: v4l: add I / P frame min max QP definitions

2019-04-22T14:25:36+00:00

Add following V4L2 QP parameters for H.264:
* V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP
* V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP
* V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP
* V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP

These controls will limit QP range for intra and inter frame,
provide more manual control to improve video encode quality.

Signed-off-by: Fish Lin 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: vicodec: Introducing stateless fwht defs and structs

2019-03-25T18:02:30+00:00

Add structs and definitions needed to implement stateless
decoder for fwht and add I/P-frames QP controls to the
public api.

Signed-off-by: Dafna Hirschfeld 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: v4l2-ctrl: Add control for h.264 chroma qp offset

2019-01-16T19:03:19+00:00

Allow to add fixed quantization parameter offset between luma and
chroma quantization parameters. This control directly corresponds
to the chroma_qp_index_offset field of the h.264 picture parameter
set.

Signed-off-by: Philipp Zabel 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: v4l2-ctrl: Add control to enable h.264 constrained intra prediction

2019-01-16T19:02:14+00:00

Allow to enable h.264 constrained intra prediction (macroblocks using
intra prediction modes are not allowed to use residual data and decoded
samples of neighboring macroblocks coded using inter prediction modes).
This control directly corresponds to the constrained_intra_pred_flag
field in the h.264 picture parameter set.

Signed-off-by: Philipp Zabel 
Signed-off-by: Hans Verkuil 
Signed-off-by: Mauro Carvalho Chehab

media: mpeg2-ctrls.h: move MPEG2 state controls to non-public header

2018-12-05T18:06:31+00:00

The MPEG2 state controls for the cedrus stateless MPEG2 driver are
not yet stable. Move them out of the public headers into media/mpeg2-ctrls.h.

Eventually, once this has stabilized, they will be moved back to the
public headers.

Unfortunately I had to cast the control type to a u32 in two switch
statements to prevent a compiler warning about a control type define
not being part of the enum.

Signed-off-by: Hans Verkuil 
Reviewed-by: Paul Kocialkowski 
Signed-off-by: Mauro Carvalho Chehab

media: v4l: fix uapi mpeg slice params definition

2018-11-06T10:07:53+00:00

We get a headers_check warning about the newly defined ioctl command
structures:

./usr/include/linux/v4l2-controls.h:1105: found __[us]{8,16,32,64} type without #include 

This is resolved by including linux/types.h, as suggested by the
warning, but there is another problem: Three of the four structures
have an odd number of __u8 headers, but are aligned to 32 bit in the
v4l2_ctrl_mpeg2_slice_params, so we get an implicit padding byte
for each one. To solve that, let's add explicit padding that can
be set to zero and verified in the kernel.

Fixes: c27bb30e7b6d ("media: v4l: Add definitions for MPEG-2 slice format and metadata")

Signed-off-by: Arnd Bergmann 
Signed-off-by: Mauro Carvalho Chehab