Create a new Message class to model a message that can be passed to an
object living in another thread. Only an invalid message type is
currently defined, more messages will be added in the future.
The Thread class is extended with a messages queue, and the Object class
with thread affinity.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
The new Thread class wraps std::thread in order to integrate it with the
Object, Signal and EventDispatcher classes. By default new threads run
an internal event loop, and their run() method can be overloaded to
provide a custom thread loop.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
The REGISTER_PIPELINE_HANDLER() macro defines and instantiates a
subclass of the PipelineHandlerFactory class that specialises the
virtual create() method. Now that create() does more than just creating
an instance, boilerplate code gets duplicated between different
factories.
Factor out the instance creation code to a new virtual createInstance()
method, and turn create() into a non-virtual method of the base class
that can then be defined in the .cpp file.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
IPAManager is a class that will search in given directories for IPA
modules, and will load them into a list. It also provides an interface
for pipeline handlers to acquire an IPA.
A meson build file for the IPAs is added, which also specifies a
hard-coded path for where to load the IPAs from in the installation
directory. More paths can be specified with the environment variable
LIBCAMERA_IPA_MODULE_PATH, with the same syntax as the regular PATH
environment variable. Make the test framework set this environment
variable.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add functions for loading the IPAInterface factory function from an IPA
module shared object, and for creating an instance of an IPAInterface.
These functions will be used by IPAManager, from which a PipelineHandler
will request an IPAInterface.
Also update meson to add the "-ldl" linker argument, to allow loading of
the factory function from a shared object.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
In order to match an IPA module with a pipeline handler, the pipeline
handler must have a name. Add a name attribute and getter to
PipelineHandler such that it can automatically be defined by
REGISTER_PIPELINE_HANDLER.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add two operations to set and get format on devices implementing the
V4L2 Metadata Interface, identified by the META_OUTPUT or META_CAPTURE
capabilities.
While at it, sort get/setFormat operations alphabetically and unify
their style (eg. no empty line before ioctl).
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To prepare for specialising the CameraConfiguration class in pipeline
handlers, return a pointer to a camera configuration instead of a
reference from Camera::generateConfiguration(). The camera configuration
always needs to be allocated from the pipeline handler, and its
ownership is passed to the application.
For symmetry, change Camera::configure() to take a CameraConfiguration
pointer instead of a reference. This aligns with our coding practice of
passing parameters that are modified by the callee by pointer.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Refactor the CameraConfiguration structure to not rely on Stream
instances. This is a step towards making the camera configuration object
more powerful with configuration validation using "try" semantics.
The CameraConfiguration now exposes a simple vector-like API to access
the contained stream configurations. Both operator[]() and at() are
provided to access elements. The isEmpty() method is renamed to empty()
and the methods reordered to match the std::vector class.
As applications need access to the Stream instances associated with the
configuration entries in order to associate buffers with streams when
creating requests, expose the stream selected by the pipeline handler
through a new StreamConfiguration::stream().
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
In order to prepare for an API overhall of the camera configuration
generation, remove the StreamUsage class and replace its uses by stream
roles. The size hints can't be specified anymore, and will be replaced
with an API on the StreamConfiguration to negotiate configuration
parameters with cameras.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Rename the configureStreams() and streamConfiguration() methods to
configure() and generateConfiguration() respectively in order to clarify
the API. Both methods deal with CameraConfiguration objects, and are
thus not limited to streams, even if a CameraConfiguration currently
contains streams only.
While at it, remove the qcam MainWindow::configureStreams() method that
is declared but never defined or used.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Implement a class to wrap around an IPA module shared object.
For now, just load a struct IPAModuleInfo with symbol name
ipaModuleInfo from an IPA module .so shared object.
Also provide a public header file including the struct IPAModuleInfo,
structured such that both C and C++ IPA modules are supported.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add lock() and unlock() which are backed by the MediaDevice
implementation and lock all media devices claimed by a pipeline handler
instance.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Instead of requiring each pipeline handle implementation to keep track
of calling release() on its media devices upon deletion, keep track of
them in the base class. Add a helper that pipeline handlers shall use
to acquire a media device instead of directly interacting with the
DeviceEnumerator.
This also means that pipeline handler implementations do no need to keep
a shared_ptr<> reference to the media devices they store locally as the
PipelineHandler base class will keep a shared_ptr<> reference to all
media devices consumed for the entire lifetime of the pipeline handler
implementation.
Centrally keeping track of media devices will also be beneficial
to implement exclusive access to pipelines across processes.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add lock() and unlock() which are backed by lockf() and allow an
instance of libcamera to claim exclusive access to a media device.
These functions are the base of allowing multiple user of libcamera to
coexist in the system without stepping on each other's toes.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
All external callers to open() and close() have been refactored and
there is no need to expose these functions anymore, make them private.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To gain better control of when a file descriptor is open to the media
device and reduce the work needed in pipeline handler implementations,
handle the file descriptor in acquire() and release().
This changes the current behavior where a file descriptor is only open
when requested by the pipeline handler to that one is always open as
long a media device is acquired. This new behavior is desired to allow
implementing exclusive access to a pipeline handler between processes.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
A udev-based device enumerator is not sufficient, since libudev is an
optional dependency, or udev might fail. In these cases, we should fall
back to using sysfs to enumerate devices.
Add a DeviceEnumeratorSysfs class which is a specialization of
DeviceEnumerator that uses sysfs to enumerate media devices on the
system.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Several of our structures include width and height fields that model a
size while we have a Size class for that purpose. Use the Size class
through libcamera, and give it a toString() method like other geometry
and format classes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
libcamera depends on libudev for device enumeration. It is however
useful to allow building documentation without requiring the dependency
to be installed. Make the libudev dependency optional and compile the
udev-based device enumerator out when libudev is not present.
Note that while libcamera will compile without libudev, it will not be
able to enumerate devices. A sysfs-based device enumerator is planned as
a fallback but not implemented yet.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
enum LogSeverity values are assigned or compared to -1 to flag invalid
log severities. This generates compilation warnings with clang. Fix it
by adding an explicit LogInvalid entry to the enumeration.
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>
Include the header file corresponding to the source file in the very
first position. This complies with the Google C++ coding style
guideliens, and helps ensuring that the headers are self-contained.
Three bugs are already caught by this change (missing includes or
forward declarations) in device_enumerator.h, event_dispatcher_poll.h
and pipeline_handler.h. Fix them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
The CameraSensor class abstracts camera sensors and provides helper
functions to ease interactions with them. It is currently limited to
sensors that expose a single subdev, and offer the same frame sizes for
all media bus codes, but will be extended to support more complex
sensors as the needs arise.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Add a method to retrieve the media entity associated with a subdevice.
The entityName() and deviceNode() methods are not needed anymore as they
can be accessed through the media entity, remove them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
The new set_overlap() function counts the number of overlapping elements
in the intersection of two sorted ranges defined by their beginning and
ending iterators.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
The methods don't modify the object instance, mark them as const. This
allows using the LOG() macro from a const method of a Loggable object.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Pipeline handlers might need to perform allocation of internal buffers,
setup operations, or simple sanity check before going into the
per-stream buffer allocation.
As of now, PipelineHandler::allocateBuffers() is called once for each
active stream, leaving no space for stream-independent configuration.
Change this by providing to the pipeline handlers the full set of active
streams, and ask them to loop over them to perform per-streams
memory allocations and freeing.
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
When switching to stream usages in the PipelineHandler StreamUsage was
was not forward declared as it should and was hid by other include
files, fix this.
Fixes: 20a6455e0b ("libcamera: camera: Add support for stream usages")
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
