The raspberrypi IPA is missing thread-safety annotations, which breaks
the build.
Add required thread-safety annotations.
../src/ipa/raspberrypi/controller/metadata.h:108:31: error: mutex
'mutex_' is still held at the end of function [-Werror,-Wthread-safety-analysis]
void lock() { mutex_.lock(); }
^
../src/ipa/raspberrypi/controller/metadata.h:108:23: note: mutex
acquired here
void lock() { mutex_.lock(); }
^
../src/ipa/raspberrypi/controller/metadata.h:109:25: error: releasing
mutex 'mutex_' that was not held [-Werror,-Wthread-safety-analysis]
void unlock() { mutex_.unlock(); }
^
Signed-off-by: Nicholas Roth <nicholas@rothemail.net>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Multiple source files in the src/apps/cam/ directory are used by cam,
qcam and lc-compliance. They are compiled separately for each
application. Move them to a new src/apps/common/ directory and compile
them in a static library to decrease the number of compilation
operations.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Fill the frame metadata in the AGC and AWB algorithm's prepare()
function. This removes the need to fill metadata manually in the IPA
module's processStatsBuffer() function.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Fill the frame metadata in the AGC and AWB algorithm's prepare()
function. Additional metadata for other algorithms will be addressed
later.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Extend the Algorithm::process() function with a metadata control list,
to be filled by individual algorithms with frame metadata. Update the
rkisp1 and ipu3 IPA modules accordingly, and drop the dead code in the
IPARkISP1::prepareMetadata() function while at it.
This only creates the infrastructure, filling metadata in individual
algorithms will be handled separately.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
When libtiff-4 is not found, the private camera_ member of the FileSink
class is set but never used. This causes a compilation error with clang:
In file included from ../../src/apps/cam/file_sink.cpp:19:
../../src/apps/cam/file_sink.h:39:27: error: private field 'camera_' is not used [-Werror,-Wunused-private-field]
const libcamera::Camera *camera_;
Fix by making the camera_ member field conditional on HAVE_TIFF.
Fixes: 6404b163bc ("cam: file_sink: Add support for DNG output")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
libtiff is a shared dependency between cam and qcam, move it to
src/apps/. The shared dependency will be used to condition compilation
of source files in an upcoming application static library.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
libevent is a shared dependency between cam and lc-compliance, move it to
src/apps/. The shared dependency will be used to condition compilation
of source files in an upcoming application static library.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
The cam and qcam test application share code, currently through a crude
hack that references the cam source files directly from the qcam
meson.build file. To prepare for the introduction of hosting that code
in a static library, move all applications to src/apps/.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
There's no need to conditionally add tiff_dep to the list of qcam
dependency, as a not found dependency() is ignored when listed in the
executable dependencies argument.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
If libtiff isn't found, DNG capture support is disabled. Don't print the
part of the --file help text that mentions DNG in that case.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
The recent change to the naming scheme for the camera tuning files failed to
rename ov9281.json, causing the sensor to fail to load. Since this is a mono
sensor module, rename this file to ov9281_mono.json.
Fixes: 820607b195: ("pipeline: raspberrypi: Update naming convention for tuning files")
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
The alsc component of ctt meant to average the two green channels into
one, but used incorrect indexing resulting in only the first green
channel being used. Fix this.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
Each declaration of a LogCategory will create a new LogCategory, and
will be stored in an unordered_set Logger::categories_. This means that
when a plugin .so is unloaded and loaded, as happens when destructing
and creating a CamereManager, we'll get duplicate categories.
The Logger::registerCategory docs say "Log categories must have unique
names. If a category with the same name already exists this function
performs no operation.". The code does not comply with this.
We solve the issue with two changes:
Change the unordered_set to a vector for simplicity, as there's no need
for an unordered_set.
Instead of using the LogCategory constructor to create new categories in
_LOG_CATEGORY() macro, use a factory method. The factory method will
return either an existing LogCategory if one exists with the given name,
or a newly created one.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
LogCategory just stores the char * that was given to it in the
constructor, i.e. it refers to memory "outside" LogCategory. If the
LogCategory is defined in a .so that is unloaded, then it leads to the
LogCategory pointing to freed memory, causing a crash.
Fix this by taking a copy of the name by using a std::string instead of
just storing the pointer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
There's no need to print the exposure and gain control ranges as an Info
message. Downgrade it to Debug. While at it, print the ranges using the
"[min, max]" syntax.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
A few periods crept in at the end of Doxygen \brief or \param statements
in the src/ipa/ directory. Remove them all in one go.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Add support for 8-bit raw formats in DNGWriter.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Add support for outputting buffers in DNG format. It reuses the DNG
writer that we had previously in qcam.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
To prepare for adding DNG support to cam, move DNGWriter from qcam to
cam so that we only have inclusions from qcam to cam and not the other
way around.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
The overloaded deserializers functions that called the main deserializer
function using iterators used cbegin() but end() instead of cend(). Make
all of these use cend() instead.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Currently, enums that are passed between pipeline handlers and their IPA
must be defined in a mojom file. However, there is a use case for
enum/flags to be defined in a C++ header, such that the enum can be used
in a component other than the pipeline handler and its IPA.
To support this, add support for the skipHeader attribute for enums.
Like structs, it is only allowed in core.mojom.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
For the purpose of testing serializing/deserializing Flags in function
parameters, add an enum class TestFlags and Flags<TestFlags> to some
function parameters, both for input and output and Signals.
While at it, update the ipa_interface_test.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
For the purpose of testing serializing/deserializing enums in function
parameters, add IPAOperationCode to the parameter list of init().
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add fields to the test struct to test serialization/deserialization of
scoped enums and flags that are struct members.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Add Flags<E> as a supported type in the IPA interface.
It is used in mojom with the [flags] attribute. Any field or parameter
type E that is prefixed with the [flags] attribute will direct the code
generator to generate the type name "Flags<E>" and appropriate
serialization/deserialization code for Flags<E> instead of for E.
It is usable and has been tested in struct members, function input and
output parameters, and Signal parameters. This does not add support for
returning Flags as direct return values.
Additionally, the [scopedEnum] attribute can be used on enum
definitions, which will instruct the code generator to convert it to an
enum class instead of a raw enum.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
There is already support for enums as struct members, but there was no
support for enums in function parameters. Add it.
This does not add support for returning enums as direct return values.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Add an enum field to the test struct member to test
serialization/deserialization of enums that are struct members.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Update the imx219, imx477 and imx519 parsers to extract the line length
values from the embedded data stream and use these values in the
deviceStatus metadata, replacing the DelayedControls provided values.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Rename CamHelper::getVBlanking to CamHelper::getBlanking, and update the
calculations in that function to return both horizontal and vertical
blanking values for a given exposure time and frame duration limits. The
calculations are setup such that vertical blanking is extended to the
maximum allowable value, and any remainder gets put into horizontal
blanking.
The calculated horizontal blanking value is now returned to the pipeline
handler to pass into DelayedControls to program into the sensor.
Update the IPA to now specify the maximum frame duration from the
maximum horizontal + vertical blanking values provided by the sensor
mode. Additionally, the IPA now uses the frame specific horizontal
blanking value (as returned by DelayedControls) in all instances.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add a lineLength field to the DeviceStatus structure to store the line
length used for a particular frame.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add CamHelper::hblankToLineLength() to calculate the line length
duration from the horizontal blanking (in pixels) value.
Add CamHelper::lineLengthToHblank() to calculate the horizontal blanking
(in pixels) value from the line length duration.
Add CamHelper::lineLengthPckToDuration() to calculate the line length
duration from the line length in pixels.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
The pixel clock rate will be used in subsequent commits to calculate
line length durations.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Update CamHelper::getDelays() to return the sensor HBLANK delay. The
HBLANK delay is set to the same value as VBLANK delay for all sensors in
the Raspberry Pi IPA.
Return the HBLANK gain delay from the IPA to the pipeline handler, and
initialise DelayedControls to handle V4L2_CID_HBLANK with this delay
value.
As a drive-by, check that the V4L2_CID_HBLANK control is available when
calling IPARPi::configure().
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Given that the single user of the CamHelper is the Raspberry Pi IPA, the
initialized_ field check is unnecessary. Remove the check and the field.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Update CamHelper::exposureLines() and CamHelper::exposure() to take a
line length duration parameter for use in the exposure calculations.
For now, only use the minimum line length for all the calculations to
match the existing IPA behavior.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add fields for minimum and maximum line length duration to the
CameraMode structure. This replaces the existing lineLength field.
Any use of the existing lineLength field is replaced by the new
minLineLength field, as logically we always want to use the fastest
sensor readout by default.
As a drive-by cosmetic change, split all fields in the CameraMode
structure into separate lines.
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add fields for minimum and maximum line length (in units of pixels) to
the IPACameraSensorInfo structure. This replaces the existing lineLength
field.
Update the ipu3, raspberrypi and rkisp1 IPAs to use
IPACameraSensorInfo::minLineLength instead of
IPACameraSensorInfo::lineLength, as logically we will always want to use
the fastest sensor readout by default.
Since the IPAs now use minLineLength for their calculations, set the
starting value of the V4L2_CID_HBLANK control to its minimum in
CameraSensor::init().
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Since libtiff version 20201219, the CFAPATTERN tag is using a variable
count and not the fixed 4 values size.
For reference, the commit introducing this is:
commit 2eb5a954cb7b7ad61559da00743c4b0e2fce34d0
Author: Sam Hasinoff <hasinoff@google.com>
Date: Sun Mar 8 21:23:16 2020 +0100
Make TIFFTAG_CFAPATTERN variable count
Add a version check in the DNGWriter::write function when this tag is
written as this breaks the raw capture in qcam.
Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
The warnings "Unknown subdev format 0x4001, defaulting to RGB encoding" and
"Unknown subdev format 0x1013, defaulting to RGB encoding" are thrown while using
simple pipeline handler with NXP ISI hardware.
The JPEG_1X8 and BGR888_1X24 media bus formats, supported by the ISI driver, are
missing in the V4L2SubdeviceFormatInfo structure storing the correspondence
between a media bus format and a colour encoding. So populate the structure with
the missing media bus formats.
Signed-off-by: Xavier Roumegue <xavier.roumegue@oss.nxp.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This patch release commences the package release procedures for the
project.
Initial releases will include a bump to the patch (0.0.x) version
number, as well as a corresponding increment to the soname.
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Support making releases of libcamera by introducing a helper script
which will facilitate the increment of any release version, along with
generating an associated tag.
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
The libcamera project is not yet ready to declare ABI nor API stability,
but it will benefit the community to be able to provide more regular
release cycles to determine 'versioned' points of history.
Ideally, these releases will be made at any ABI breakage, but can be
made at arbitary time based points along the way.
To support releases which may not be ABI stable, declare the soversion
of both the libcamera and libcamera-base library to be dependant upon
both the major minor and patch component of the project version.
As part of this, introduce a new 'Versions' summary section to highlight
the different version components that may become apparent within any
given build.
Bumping versions may leave dangling libcamera.so.* symlinks in build
directories. This will confuse Doxygen which will print during its
directory scanning phase a warning that the symlink can't be read. As we
don't need Doxygen to follow symlinks, disable it with EXCLUDE_SYMLINKS.
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
The comment for supporting the custom script on 'make dist' contains a
typo. Fix it.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
V4L2 has deprecated queuing output buffers with bytesused set to 0. Warn
if the caller attempts to do so.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Naushir Patuck <naush@raspberrypi.com>
The bytesused value for the parameters buffer is initialized to 0 and
never set. The V4L2 API specification indicates that, for an output
video device, the driver will set the bytesused value to the size of the
plane in that case. The videobuf2 framework does so, but considers this
as deprecated and prints a warning:
[ 54.375534] use of bytesused == 0 is deprecated and will be removed in the future,
[ 54.388026] use the actual size instead.
Fix it by setting bytesused to the correct value before queuing the
parameters buffer.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Naushir Patuck <naush@raspberrypi.com>
The bytesused value for the parameters buffer is initialized to 0 and
never set. The V4L2 API specification indicates that, for an output
video device, the driver will set the bytesused value to the size of the
plane in that case. The videobuf2 framework does so, but considers this
as deprecated and prints a warning:
[ 54.375534] use of bytesused == 0 is deprecated and will be removed in the future,
[ 54.388026] use the actual size instead.
Fix it by setting bytesused to the correct value before queuing the
parameters buffer.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Naushir Patuck <naush@raspberrypi.com>
Private members of the FrameBuffer class are split between FrameBuffer
and FrameBuffer::Private. There was no real justification for this
split, and keeping some members private in the FrameBuffer class causes
multiple issues:
- Future modifications of the FrameBuffer class without breaking the ABI
may be more difficult.
- Mutable access to members that should not be modified by applications
require a friend statement, or going through the Private class.
Move all remaining private members to the Private class to address the
first issue, and add a Private::metadata() function to address the
second problem.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Naushir Patuck <naush@raspberrypi.com>
