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Commit b817bcec6b53 ("libcamera: Auto generate version information")
generates version information in order to automatically include it
various locations (Sphinx and Doxygen documentation, libcamera::version
variable available at runtime, and version.h available at compile time).
Unfortunately this causes lots of unnecessary rebuilds when modifying
the git tree state, which hinders development.
The problem is caused by the generated version.h being listed as a
dependency for the whole libcamera. This is required as meson (to the
best of my knowledge) doesn't provide a way to explicitly specify the
dependency of a single object file (camera_manager.o in this case, as
camera_manager.cpp is the only consumer of the generated version string)
on the custom target used to generate version.h. The dependency can't be
automatically detected at build time, like dependencies on normal
headers that are generated by parsing the source, because the version.h
header may not exist yet. The build could then fail in a racy way.
This change attempts at solving the issue by generating a version.cpp
instead of a version.h to set the git-based version. This minimises the
number of files that need to be rebuild when then git tree state
changes, while retaining the main purpose of the original automatic
version generation, the ability to access the git-based version string
at runtime. We however lose the ability to access git-based version
information at build time in an application building against libcamera,
but there is no expected use case for this.
The version string is moved from the libcamera namespace to the
CameraManager class in order to avoid including version.h inside
libcamera (in version.cpp and in camera_manager.cpp), which would create
dependencies causing more rebuild steps, as described above.
On the other hand, major, minor and patch level version numbers are
useful at build time. This commit changes the generation of version.h in
order to add three macros named LIBCAMERA_VERSION_MAJOR,
LIBCAMERA_VERSION_MINOR and LIBCAMERA_VERSION_PATCH for this purpose.
version.h is not included by any other libcamera header or source file,
and thus doesn't force a rebuild of the library.
The Sphinx and Doxygen documentation keep their git-based version
information, which is set during the configuration of the build and then
doesn't track git commits. We may want to investigate how to improve
this, but given that git-based version for the documentation has very
few use cases outside of tagging nightly builds, this isn't considered
an issue at the moment.
The documentation install directory now uses the base version string, in
order to avoid increasing the number of documentation directories
needlessly. This shouldn't cause any issue as the API should not change
without a change to the version number.
The version number generation and handling code now also standardises
the version variables to not start with a 'v' prefix in meson, in order
to simplify their handling. The prefix is added when generating the
relevant files.
Note that we go back to specifying the fallback version in the main
meson.build, in the call to the project() function. For the time being I
believe this should be a good compromise to avoid unnecessary
recompilation, and moving the fallback version to a different file for
tarball releases can be built on top of this.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Provide an average FPS in the QCam title bar to show the current rate of
frame processing.
The QCam compilation is updated to process the Qt MoC headers to support
signals and slots accordingly.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Provide the version string reported by the libcamera library on the qcam
test utility.
This helps confirm the exact version of the library that is being used
while testing.
The version string is stored in the MainWindow so that it can be reused
without reconstructing.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The 'last' buffer timestamp is stored as a static. Rename the variable
to a more descritive 'lastBufferTime' and move it to the class instance.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Generate a version string, and provide a global string object which
allows applications to interrogate the current libcamera version
information.
The version header is automatically updated by meson on each build.
The string roughly follows the semver [0] conventions of
major.minor.patch-label as a value.
[0] https://semver.org/
A script (utils/gen-version.sh) is provided which is modelled upon the
processing from autoconf's git-version-gen. The gen-version.sh script
will look for tags in the form vX.Y as starting points for the version
string. While the repository does not have any matching tags, v0.0 will
be assumed, resulting in versions with both major and minor being set to
'0', and the patch count resulting from the number of patches in the
history to that point.
Finally, a uniquely identifying shortened hash is provided from git:
v0.0.509+0ec0edf7
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Group together operations to enumerate formats and operations to handle
memory handling, alternating public and private operations but
respecting the ordering within each group. Cosmetic change only.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Make elfLoadSymbol more generic by making the symbol size an output
rather than an input. Also move the memcpy out of elfLoadSymbol.
If the size of struct IPAModuleInfo changes between versions, we still
want to be able to load it and perhaps do conversions for backwards
compatibility. In this case the size should not be a restriction when
searching for the symbol.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add an error message to tell, if an IPA module failed to load, the
path to the IPA module shared object that was attempted to be loaded.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Add a method to IPAModule to get the path of the IPA module shared
object that the IPAModule was constructed from.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Implement control support in the VIMC pipeline handler by dynamically
querying the V4L2 device for the supported V4L2 controls and populating
the list of camera controls accordingly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Implement control support in the UVC pipeline handler by dynamically
querying the V4L2 device for the supported V4L2 controls and populating
the list of camera controls accordingly.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add an initial set of controls to demonstrate how controls are defined.
Proper documentation for each control is missing.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Provide a ControlList on request objects to facilitate setting controls.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The ControlList class implements a map from control specifier to control
ID. To avoid constant lookups of ControlInfo when using the class in the
libcamera core or in pipeline handlers, the map uses ControlInfo
pointers instead of ControlId values. This is however not very
convenient for applications or pipeline handlers, as they would be
forced to first look up the ControlInfo pointers for the controls they
want to access. Facilitate ease of use of ControlLists by implementing
an internal lookup of the ControlInfo from the controls provided by the
Camera.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Extend the Camera class to expose the controls it supports. Each
pipeline should generate a list of controls supported by each camera it
creates. These are represented by a ControlInfoMap, and an associated
ControlList of default values.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Add a set of data types to support controls:
- ControlValue stores a control type and value in a generic way
- ControlId enumerates all the control identifiers
- ControlIdentifier declares the types of a control and map their names
- ControlInfo stores runtime information for controls
- ControlList contains a set of control info and value pairs
The control definitions map is generated from the controls documentation
to ensure that the two will always be synchronised.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Add a new controls() method to the V4L2Device class to retrieve the map
of all supported controls. This is needed in order to dynamically query
the supported controls, for instance for drivers that support different
sets of controls depending on the device model.
To make the API easier to use, create a type alias for the control ID to
ControlInfo and use it.
Remove the getControlInfo() method that is not used externally, as it
can now be replaced by accessing the full list of controls.
Update the CameraSensor API accordingly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Add min() and max() methods to V4L2ControlInfo to report the control's
minimum and maximum value respectively.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Blocking socket operation when receiving messages may lead to long
delays, and possibly a complete deadlock, if the remote side delays
sending of the payload after the header, or doesn't send the payload at
all. To avoid this, make the socket non-blocking and implement a simple
state machine to receive the header synchronously with the socket read
notification. The payload read is still synchronous with the receive()
method to avoid data copies.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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To be able to isolate an IPA component in a separate process an IPC
mechanism is needed to communicate with it. Add an IPC mechanism based
on Unix sockets which allows users to pass both data and file descriptors
to and from the IPA process.
The implementation allows users to send both data and file descriptors
in the same message. This allows users to more easily implement
serialization and deserialization of objects as all elements belonging
to an object can be sent in one message.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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If a timer is running while it's deleted it is still register with the
event dispatcher. This causes a segmentation fault when the timer
time-out and its signal is emitted. Fix this my stopping the timer when
it's deleted.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Compiling with clang renders errors as a variable-sized arrays are not
allowed to be initialized. Solve this by using memset() for v4l2Ctrls
which is the only one of the two arrays that needs to be zeroed.
../../src/libcamera/v4l2_device.cpp:155:37: error: variable-sized object may not be initialized
const V4L2ControlInfo *controlInfo[count] = {};
^~~~~
../../src/libcamera/v4l2_device.cpp:156:36: error: variable-sized object may not be initialized
struct v4l2_ext_control v4l2Ctrls[count] = {};
^~~~~
../../src/libcamera/v4l2_device.cpp:227:37: error: variable-sized object may not be initialized
const V4L2ControlInfo *controlInfo[count] = {};
^~~~~
../../src/libcamera/v4l2_device.cpp:228:36: error: variable-sized object may not be initialized
struct v4l2_ext_control v4l2Ctrls[count] = {};
^~~~~
Fixes: eb068f4e67eedacd ("libcamera: v4l2_device: Implement get and set controls")
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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When enumerating the available V4L2 controls at video device open
time set the V4L2_CTRL_FLAG_NEXT_CTRL flag if an unsupported control
type is encountered to prevent infinite loops.
While at it, downgrade the message reporting the unsupported control
type to Debug, as it is not an error worth being reported unconditionally.
Fixes: 030ce6491ed3 ("libcamera: v4l2_device: List valid controls at open")
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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When using -std=c++11, GCC versions 6.2 and 6.3 take objection to
declaring a struct type when using a range based iterator:
event_dispatcher_poll.cpp:231:13: error: types may not be defined
in a for-range-declaration [-Werror]
for (const struct pollfd &pfd : pollfds) {
^~~~~~
cc1plus: all warnings being treated as errors
Removing the keyword 'struct' ensures that the compiler does not try to
declare the type, and instead uses the type as already defined by the
relevant poll.h header.
This issue does not affect later compiler versions.
Reported-by: [autobuild.buildroot.net] Thomas Petazzoni <thomas.petazzoni@bootlin.com>
http://autobuild.buildroot.net/results/f6dd4c60c04892c8b1669e6000fce7edb2b6349e/
Fixes: 8356f8a6ab87 ("libcamera: Add a poll-based event dispatcher")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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queueRequest() is called after starting the stream.
If it fails, the stream should be stopped, otherwise it can get a
"Device or resource busy" error, due to VIDIOC_REQBUFS ioctls being
called after VIDIOC_STREAMON without VIDIOC_STREAMOFF in-between.
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Set the ImgU pipe_mode control based on the active stream configuration.
Use 'Video' pipe mode unless the viewfinder stream is not active.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add operations to get and set control and to retrieve the informations
on a V4L2 control. For simple camera sensors, the operations are
directly called on the underlying V4L2 subdevice.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Implement getControls() and setControls() operations in V4L2Device class.
Both operations take a V4L2Controls instance and read or write the V4L2
controls on the V4L2 device.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Enumerate all the valid controls a device supports at open() time.
A control is valid only if its type is supported.
Store the control information in a map inside the device to save
querying the control when setting or getting its value from the device
and provide an operation to retrieve information by control ID.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add libcamera V4L2 control support, implemented using the V4L2 Extended
Control APIs. This patch defines the types used to create and manage
controls.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Include errno.h header to fix missing definition of -EEXIST error code:
src/libcamera/formats.cpp:43:11: error: use of undeclared identifier 'EEXIST'
Fixes: 1cf709b1d2bb ("libcamera: formats: Add ImageFormats")
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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The file uses the std::array class but doesn't include the corresponding
header. This breaks compilation with clang and libc++. Fix it.
Fixes: 63c578ed9993 ("libcamera: stream: Add StreamFormats")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Now that we have V4L2Device and V4L2VideoDevice update the documentation
of the latter to use "video device" every time the term "device" was
used in the V4L2 context.
While at it clean up by removing a stale todo entry.
Documentation only change, no functional changes intended.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The V4L2 devices and subdevices share a few common operations,like
opening and closing a device node, and perform IOCTLs on the device.
With the forthcoming introduction of support for V4L2 controls, the
quantity of shared code will increase, as the control support
implementation is identical for the two derived classes.
To maximize code re-use and avoid duplications, provide a V4L2Device
base class which groups the common operations and members.
The newly introduced base class provides methods to open/close a device
node, access the file descriptor, and perform IOCTLs on the device.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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In preparation of creating a new V4L2Device base class, rename
V4L2Device to V4L2VideoDevice.
This is a project wide rename without any intended functional change.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Integer options have to use base 10. This isn't user-friendly when
specifying pixel formats. Detect the base automatically to support base
16. As a side effect, integer values starting with 0 will be interpreted
in base 8.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Extend the uvcvideo pipeline with format information and validation. The
format information is gathered by enumerating the v4l2 device. This
enumeration approach is valid for UVC as it has a static and simple
media graph.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add a new option to the cam tool that prints information about the
configuration supplied by the user. If the option is specified,
information about the configuration is printed after the configuration
has been verified and possibly adjusted by the camera.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Use CameraConfiguration::validate() to validate and possibly update the
camera configuration when its prepared.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Most of the camera configuration preparation that is done in the
Capture module is not specific to capturing and could be useful for
other modules. Extract the generic parts to CamApp and do basic
preparation of the configuration before passing it to modules.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Allow StreamFormats to be associated to a StreamConfiguration. The
intention is that pipeline handlers should associate formats to a
StreamConfiguration when it's created in generateConfiguration().
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add a StreamFormats class which describes all the formats supported by a
stream. The object does not collect any information itself but can
simplify user interactions with formats as it's able to translate a
stream format range into a discrete list and a discrete list to a range.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add methods to enumerate pixelformats and frame sizes from a V4L2
device. The interface is similar to how V4L2Subdevice enumerates mbus
codes and frame sizes.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Replace all usage of FormatEnum with ImageFormats and completely
remove FormatEnum which is no longer needed.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Align the enumPadSizes() interface and implementation with that of
enumPadCodes(). There is no functional change.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Simplify frame size enumeration by breaking out mbus code enumeration in
a helper, making the code easier to read while also preparing for
enhancing the frame size enumeration. There is no functional change.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add a new class to hold format information for V4L2 devices and
subdevices. The object describes the relationship between either pixel
formats (V4L2 devices) or media bus codes (V4L2 subdevice) and a list of
image sizes which can be produced with that format.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add a method to check if a Size can fit inside a SizeRange. When
determining if a size is containable take step values into account if
they are not set to 0.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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It's useful to be able to print a string representation of a SizeRange
to the log or console, add a toString() method. While at it turn the
structure into a class as it contains functions as well as data.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The size range described might be subject to certain step
limitations. Make it possible to record this information.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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