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2019-02-01libcamera: camera: Add acquire() and release()Laurent Pinchart
Exclusive access must be obtained before performing operations that change the device state. Define an internal flag to track ownership and provide a means of protecting functions that change device configuration. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-01libcamera: stream: add initial StreamConfiguration structureNiklas Söderlund
Add an initial StreamConfiguration implementation to hold configuration data for a single stream of a Camera. In its current form not many configuration parameters are supported but it's expected the number of options will grow over time. At this stage the pixel format is represented as an unsigned int to allow for easy mapping to the V4L2 API. This might be subject to change in the future as we finalize how libcamera shall represent pixel formats. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-01libcamera: stream: add initial Stream classNiklas Söderlund
Add an initial Stream implementation. The idea is that once capability support is added to the library each stream will describe its capabilities using this class. An application will then select one or more streams based on these capabilities and use them to configure the camera and capture. At this stage the Stream class is empty as capabilities are yet to be added. The class is still useful as it will be used to communicate how many streams a Camera object provides. 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>
2019-01-31libcamera: camera: Fix operator= definitionLaurent Pinchart
The class assignment operator is usually defined as returning a reference to the object, to allow a = b = c statements. While the return type makes no difference when deleting the operator in a class definition, it's still a good practice to use the correct return type. Fix it in the Camera and CameraManager classes. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-30libcamera: pipeline: uvcvideo: add error if no default video device is foundNiklas Söderlund
If for any reason a default video device is not found in the media graph the creation of the UVC pipeline silently failed. This is not optimal when debugging problems with the pipeline, add an error to notify the user of the issue. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-01-30utils: hooks: Provide post-commit hook example to checkstyle.pyKieran Bingham
Provide an example post-commit hook which a developer can install, ensuring that every commit gets the style checker executed on it. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-01-29libcamera: v4l2_device: Add methods to get/set formatJacopo Mondi
Add methods to set and get the image format programmed on a V4L2Device for both the single and multi planar use case. Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-29libcamera: v4l2-format: Add V4L2DeviceFormatJacopo Mondi
Add a V4L2DeviceFormat class aimed to be used to provide format configuration requests to a V4L2Device. Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-29libcamera: ipu3: Re-work camera data registrationJacopo Mondi
Re-work camera data registration to create the cameraData pointer as unique_ptr<> and make clear its ownership model. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-29libcamera: ipu3: Add method to retrieve camera dataJacopo Mondi
Provide a method for the IPU3 pipeline handler that hides the downcast required to return an "IPU3CameraData *" reference from the PipelineHandler::cameraData() method. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-27libcamera: v4l2_device: Fix operator= definitionJacopo Mondi
While the C++ allows the redefinition of operator= to return an arbitrary type, it is customary to return a reference to the assigned value type. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-27libcamera: signal: Don't use reinterpret_cast<>() to perform downcastsLaurent Pinchart
Use static_cast<>() instead of reinterpret_cast<>() to perform downcasts, as reinterpret_cast<>() isn't meant (and guaranteed to be safe) for that purpose. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-27cam: options: Indent multi-line help message correctlyLaurent Pinchart
Split multi-line help messages and indent all lines the same way. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-27libcamera: pipeline: sort forward declarations of classesNiklas Söderlund
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-26libcamera: pipeline: Refuse to substitute camera dataJacopo Mondi
Once a pipeline-specific data has been associated with a camera, refuse to update it in order to avoid invalidating the previously set reference, which might still be owned by the caller. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-26libcamera: pipeline: Misc comments updateJacopo Mondi
Apply some comments improvements pointed out during review. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-26libcamera: pipeline: Rework class destructorJacopo Mondi
Remove comment and do not delete a class member, as it will be destroyed already with the instance that contains it. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-26libcamera: pipeline: Remove duplicated includeJacopo Mondi
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-26libcamera: pipeline: Fix operator= declarationJacopo Mondi
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-26libcamera: v4l2_device: Fix wording in documentationLaurent Pinchart
Fix one wording issue in documentation. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-26libcamera: media_device: Fallback to legacy ioctls on older kernelsLaurent Pinchart
Prior to kernel v4.19, the MEDIA_IOC_G_TOPOLOGY ioctl didn't expose entity flags. Fallback to calling MEDIA_IOC_ENUM_ENTITIES for each entity to retrieve the flags in that case. Fixes: 67d313240c9b ("libcamera: pipeline: uvcvideo: create a V4L2Device for the default video entity") 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>
2019-01-25cam: options: optional arguments needs to be specified as --foo=barNiklas Söderlund
It's not stated in the getopt_long documentation but optional arguments need to be specified as '--foo=bar' instead of '--foo bar', otherwise the value is not propagated to optarg during argument parsing. Update the usage printing helper to reflect this requirement. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-25cam: Add event loopLaurent Pinchart
Add a simple event loop to the cam application and use it in the main() function, with an example of how to handle SIGINT to gracefully stop the loop. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-25libcamera: pipeline: uvcvideo: create a V4L2Device for the default video entityNiklas Söderlund
Add a V4L2Device for the default video entity in the media graph. The UVC pipeline needs to search for the entity marked with the MEDIA_ENT_FL_DEFAULT flag as the entity names in the media graph varies depending on which device is used. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-25libcamera: pipelines: rename MediaDevice member for UVC and VIMCNiklas Söderlund
The name dev_ does a poor job of representing that it holds a media device, rename it to media_. There is no functional change in this change just s/dev_/media_/. Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-25libcamera: MediaEntity: expose the entity flagsNiklas Söderlund
The media entity flags can be useful for pipeline handlers to find the default device in a media graph which is marked with the MEDIA_ENT_FL_DEFAULT flag. This will be especially useful for the UVC pipeline handler where the entity names differ per device. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-25libcamera: ipu3: Create CIO2 V4L2 devicesJacopo Mondi
Create V4L2 devices for the CIO2 capture video nodes and associate them with the camera they are part of. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-25libcamera: pipeline_handler: Add CameraDataJacopo Mondi
Add class definition and methods to associate a Camera with specific data in the pipeline_handler base class. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-25libcamera: v4l2_device: Identify multiplanar formatsJacopo Mondi
Add functions to V4L2Capability to identify if a V4L2 device supports multiplanar V4L2 APIs. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-25libcamera: device_enumerator: Add hotplug supportLaurent Pinchart
Create a udev_monitor in the udev device enumerator to listen to media device disconnection, and emit the corresponding media device's disconnect signal in response. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-25libcamera: pipeline: uvc: Mark the media device as hotpluggableLaurent Pinchart
UVC devices can be hot-unplugged. Mark the corresponding media device as hotpluggable to ensure proper disconnection support. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-25libcamera: pipeline_handler: Add camera disconnection supportNiklas Söderlund
Pipeline handlers are responsible for creating camera instances, but also for destroying them when devices are unplugged. As camera objects are reference-counted this isn't a straightforward operation and involves the camera manager and camera object itself. Add two helper methods in the PipelineHandler base class to register a camera and to register a media device with the pipeline handler. When registering a camera, the registerCamera() helper method will add it to the camera manager. When registering a media device, the registerMediaDevice() helper method will listen to device disconnection events, and disconnect all cameras created by the pipeline handler as a response. Under the hood the PipelineHandler class needs to keep track of registered cameras in order to handle disconnection. They can't be stored as shared pointers as this would create a circular dependency (the Camera class owns a shared pointer to the pipeline handler). Store them as weak pointers instead. This is safe as a reference to the camera is stored in the camera manager, and doesn't get removed until the camera is unregistered from the manager by the PipelineHandler. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-24libcamera: camera_manager: Add method to unregister a cameraLaurent Pinchart
The new removeCamera() method is meant to be used by pipeline handlers to unregister a camera in case of device disconnection. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-24libcamera: camera: Add disconnection notificationNiklas Söderlund
As camera object have the potential to outlive the hardware they represent, there is a need to inform the camera that the underlying device has been disconnected, and in turn to notify applications. Implement a disconnection notification mechanism that can be used by pipeline handlers to notify the camera of disconnection. The camera then block all new API calls and emit the disconnected signal. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-24libcamera: media_device: Add disconnected signalLaurent Pinchart
The signal is emitted when the hardware device corresponding to the media device is unplugged. This will trigger the full unplug handling chain. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-24libcamera: device_enumerator: Reference-count MediaDevice instancesLaurent Pinchart
The MediaDevice class will be the entry point to hot-unplug, as it corresponds to the kernel devices that will report device removal events. The class will signal media device disconnection to pipeline handlers, which will clean up resources as a result. This can't be performed synchronously as references may exist to the related Camera objects in applications. The MediaDevice object thus needs to be reference-counted in order to support unplugging, as otherwise pipeline handlers would be required to drop all the references to the media device they have borrowed synchronously with the disconnection signal handler, which would be very error prone (if even possible at all in a sane way). Handle MedieDevice instances with std::shared_ptr<> to support this. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-24libcamera: camera: Associate cameras with their pipeline handlerNiklas Söderlund
The PipelineHandler which creates a Camera is responsible for serving any operation requested by the user. In order forward the public API calls, the camera needs to store a reference to its pipeline handler. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> --- Changes since v1: - Create pipeline handlers is shared pointers, make them inherit from std::enable_shared_from_this<> and stored them in shared pointers.
2019-01-24libcamera: pipeline_handler: Declare factory children classes as finalLaurent Pinchart
Nothing should inherit from the factory classes created by the REGISTER_PIPELINE_HANDLER() macro. Declare them as final instead of only declaring their create() method final. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-24libcamera: pipeline_handler: Store the camera manager pointerLaurent Pinchart
Instead of passing the camera manager pointer to the match() function, and later to more PipelineHandler functions, store it in the PipelineHandler::manager_ member variable at construction time and access it from there. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-23tests: event-dispatcher: Add processEvents() interruption testLaurent Pinchart
Test that the EventDispatcher::interrupt() function correctly interrupts the processEvents() function, both when called before processEvents() and when called while it is running. 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>
2019-01-23libcamera: event_dispatcher: Add interrupt() functionLaurent Pinchart
The new interrupt() function allows interrupting in-progress blocking processEvents() calls. This is useful to stop running event loops. 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>
2019-01-23libcamera: event_dispatcher_poll: Handle interrupted ppoll() callsLaurent Pinchart
The ppoll() call can be interrupted if a signal is delivered. Handle the EINTR error code gracefully by restarting the call. This fixes the event-dispatcher test failure. 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>
2019-01-23tests: Test event dispatcher interruption by signalLaurent Pinchart
Add a test to verify that the event dispatcher correctly restarts event processing when interrupted by a signal. The test currently fails as this feature isn't implemented. 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>
2019-01-23libcamera: fix odd include file hierarchyNiklas Söderlund
There is no need for pipeline_handler.h to include camera.h, instead it should be included in the source file which needs it; camera_manager.cpp. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-23libcamera: log: Fix two typosKieran Bingham
Two incorrect spellings are fixed. 'logr' -> 'log' 'environement' -> 'environment' Fixes: 747ace042cc1 ("libcamera: log: Get log levels from the environment") Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> The log levels configuration is stored in category:level pairs, not category=value. Fix the documentation. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-01-23libcamera: v4l2device: Obtain device capabilitiesKieran Bingham
The capabilities structure from the kernel can return capabilities of the driver, or potentially more specific device capabilities. Handle this with an inline function 'device_caps()' to return the device specific capabilities when available, or fall back to the driver capabilities otherwise. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-01-22cam: options: Don't implement move semantics for OptionsParser::OptionsLaurent Pinchart
The compiler creates a move constructor automatically when none is supplied, and it does the right thing by default in this case. Using std::move() inside the function prevents the compiler from doing return value optimization and actually hinders performances. Using std::move() in the caller is unnecessary, the move constructor is used automatically by the compiler. For all these reasons remove the tentative optimization that resulted in worse performances and worse code. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-01-22libcamera: camera_manager: Return EBUSY if enumerator existsKieran Bingham
In the case that someone calls CameraManager::start() and it has already started/enumerated, instead of returning -ENODEV, return -EBUSY. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-01-22libcamera: media_device: fix typo in documentation for MediaDevice::deviceNode()Niklas Söderlund
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Acked-by: Jacopo Mondi <jacopo@jmondi.org>
2019-01-22libcamera: ipu3: Use log categoriesJacopo Mondi
Log the IPU3 pipeline using IPU3 log category Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>