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2019-03-01libcamera: v4l2_subdevice: Store media entityJacopo Mondi
Store the media entity backing the V4L2Subdevice and add a deviceName() method to retrieve the human readable name of the subdevice, which is created using the name of the associated media entity. Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-03-01libcamera: camera: add state machine to control access from applicationsNiklas Söderlund
There is a need to better control the order of operations an application performs on a camera for it to function correctly. Add a basic state machine to ensure applications perform operations on the camera in good order. Internal to the Camera states are added; Available, Acquired, Configured, Prepared and Running. Each state represents a higher state of configuration of the camera ultimately leading to the highest state where the camera is capturing frames. Each state supports a subset of operations the application may perform. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-28libcamera: store stream pointers in sets instead of a vectorsNiklas Söderlund
The arrays that store Stream pointers shall always contain unique values. Storing them in vectors opens up for the same stream pointer appearing twice. Remove this possibility by storing them in a set which guarantees each element is unique. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-28cam: fix order camera is operated onNiklas Söderlund
Upcoming enforcing of order the camera shall be operate on is not compatible with the cam utility. Requests shall be queued after the camera is started, not before. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-27libcamera: align the documentation for numeric error codesNiklas Söderlund
Rapid growth of the library have resulted in slightly different wording to document that a function returns 0 on success or a negative error code otherwise. Align all different variations. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-27libcamera: camera: fix bug in error check for streamConfiguration()Niklas Söderlund
The return statement is missing altogether and an error is silently ignored. Fix this and also update the empty map to use the correct type for the map key. Fixes: 65ea2422d24a3073 ("libcamera: camera: extend camera object to support configuration of streams") Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25cam: Improve when usage information is printedNiklas Söderlund
Running the cam tool without any options results in the tool to exit with EXIT_FAILURE but no usage being printed, this is confusing. Improve this by also printing the usage text. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25cam: fix printing of camera nameNiklas Söderlund
Since commit c8c546fe99a343c1 ("cam: options: Add option type handling to options parser") introduced type handling for options the context the option is read became important. When reading the camera option for printing there is no explicit context to print it as a string and instead the int context was chosen resulting in: $ cam --camera foo Camera 0 not found While the expected output is: $ cam --camera foo Camera foo not found Fix this by providing the correct context for the camera option when printing it. Fixes: c8c546fe99a343c1 ("cam: options: Add option type handling to options parser") Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25cam: improve error checking when capturingNiklas Söderlund
The return value when start() and stop() the camera should be checked and handled. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25cam: free allocated buffers when done capturingNiklas Söderlund
The allocated buffers needs to be freed once the application is done with them. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25cam: fix return type of configureStreams()Niklas Söderlund
The only caller of configureStreams() stores its return value as an int and not bool. This is confusing and also prevents the (possibly) different error codes returned by Camera::configureStreams() to be propagated inside the cam tool. Fix this by changing the return type to int and propagate the return value from the camera. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25libcamera: pipeline: vimc: enforce stream configurationNiklas Söderlund
The format requested by configureStreams() should exactly match what is programmed on the video device. If they do not match the call should fail as the application in that case will not know what configuration was actually programmed. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25libcamera: pipeline: uvcvideo: enforce stream configurationNiklas Söderlund
The format requested by configureStreams() should exactly match what is programmed on the video device. If they do not match the call should fail as the application in that case will not know what configuration was actually programmed. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-25libcamera: pipeline_handler: extend documentation for configureStreams()Niklas Söderlund
Extend the documentation to explicitly state that the pipeline handler implementations are responsible for validating that the requested configuration can be exactly satisfied by the hardware. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-19libcamera: v4l2_subdevice: Fix S_SELECTION ioctl argumentJacopo Mondi
The SUBDEV_S_SELECTION argument needs to be a pointer. Fix it. Fixes: 468176fa07d9 ("libcamera: Add V4L2Subdevice") Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-02-14libcamera: device_enumerator: Remove move() on search() returnJacopo Mondi
Remove the std::move() call on the shared_ptr<MediaDevice *> returned by the search() method and remove the std::move() call on temporary return value in pipeline handlers that use the method. Thanks to copy elision, the regular constructor of the newly created object is called, avoiding un-necessary copies. Furthermore, the use of std::move() in the return and assignment statements prevents the compiler from performing copy elision, forcing it to generate two sequences of un-necessary calls to the class' move constructor and destructor. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-02-14libcamera: device_enumerator: Break line longer than 80 columnsJacopo Mondi
Since there is no valid reason to exceed 80 columns for this lane, break 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>
2019-02-14libcamera: v4l2_subdevice: Forward-declare MediaEntityJacopo Mondi
The V4L2Subdevice class uses MediaEntity instances, and the corresponding header is not included. Fix this by forward declaring the MediaEntity class. Fixes: 468176fa07d9 ("libcamera: Add V4L2Subdevice") Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
2019-02-13libcamera: v4l2_device: importBuffers supportKieran Bingham
Provide the ability to import a BufferPool into the V4L2Device allowing external dmabuf backed buffers to be queued. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-13libcamera: v4l2_device: Simplify exportBuffers()Kieran Bingham
exportBuffers() can only operate on an existing BufferPool allocation. The pool identifies its size through its .count() method. Passing a count in to the exportBuffers() call is redundant and can be incorrect if the value is not the same as the BufferPool size. Simplify the function and remove the unnecessary argument, correcting all uses throughout the code base. While we're here, remove the createBuffers() helper from the V4L2DeviceTest which only served to obfuscate which pool the buffers were being allocated for. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-13libcamera: v4l2_device: Use non-interlaced framesKieran Bingham
Use V4L2_FIELD_NONE where applicable to disable support for interlaced frames. We are unlikely to support interlaced frames on cameras so hardcode this field type for now. If we decide to support interlacing later it can be revisited. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-13libcamera: v4l2_device: Support queueing buffers to an output deviceKieran Bingham
To queue a buffer to an output device, we must set the buffer properties. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-13libcamera: device_enumerator: Fix LOG usageKieran Bingham
Add the DeviceEnumerator category to the last LOG() call requiring it. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-13libcamera: v4l2_subdevice: Fix LOG usageKieran Bingham
Add the V4L2Subdev category to the last LOG() call requiring it. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-13libcamera: v4l2_device: Fix LOG usageKieran Bingham
Add the V4L2 category to the LOG() statements. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-13libcamera: signal: Disconnect signal automatically on slot deletionLaurent Pinchart
When a signal is connected to a member function slot, the slot is not disconnected when the slot object is deleted. This can lead to calling a member function of a deleted object if the signal isn't disconnected manually by the slot object's destructor. Make signal handling easier by implementing a base Object class that tracks all connected signals and disconnects from them automatically when the object is deleted, using template specialization resolution in the Signal class. As inheriting from the Object class may to a too harsh requirement for Signal usage in applications, keep the existing behaviour working if the slot doesn't inherit from the Object class. We may reconsider this later and require all slot objects to inherit from the Object class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-13libcamera: pipeline_handler: Disconnect MediaDevice::disconnected signalLaurent Pinchart
The pipeline handler connects the disconnected signal of MediaDevice instances registered for hotplug handling to a member slot. Disconnect the signal when the slot is called, as the pipeline handler will be deleted. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-13cam: options: Fix coding style issue related to templatesLaurent Pinchart
Our coding style doesn't add a space after the template keyword. Fix the source code accordingly. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-11libcamera: v4l2_device: Inherit from Loggable to print device node nameLaurent Pinchart
Automate printing of device node name in log messages by inheriting from the Loggable class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-11libcamera: log: Allow extending log messagesLaurent Pinchart
Introduce a base Loggable class that can be inherited from by other classes to support adding per-instance information to the log messages. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-11libcamera: pipeline_handler: Reorder member declaration orderLaurent Pinchart
Reorder the member declaration order in the PipelineHandler class to match the control flow order, and to declare variables after methods according to the coding style. Update the documentation accordingly, preserving the order within the public, protected and private sections, but grouping related methods together between the sections. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-08libcamera: pipeline: vimc: Fix name of pipeline handler classNiklas Söderlund
Rename the VIMC pipeline handler to match the naming convention. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06cam: Add option to write raw frames to diskNiklas Söderlund
Use the helper BufferWriter to optionally write frames to disk as they are captured. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06cam: Add BufferWriter helperNiklas Söderlund
Add a simpler helper to allow the cam application to write raw captured frames to disk. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06cam: Add capture operationNiklas Söderlund
Add an option to capture frames from a camera and keep it running until the user terminates by sending SIGINT. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: pipeline: ipu3: Implement capture supportJacopo Mondi
Replace the buffer allocation, capture start/stop and request queue stubs with real implementations. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: pipeline: ipu3: Create video devices and subdevicesJacopo Mondi
Create the video devices and subdevices associated with an IPU3 camera. While at there, move the IPU3 pipeline handler class definition and the associated IPU3CameraData to a separate header as the class has now grown enough. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: pipeline: vimc: Implement capture supportNiklas Söderlund
Replace the buffer allocation, capture start/stop and request queue stubs with real implementations. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: pipeline: vimc: Set a default formatNiklas Söderlund
Pick a default format for the one stream in a vimc camera. This is just a starting point to define a good default format for the vimc camera, and is expected to evolve over time as the capabilities of the library grows. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: pipeline: uvcvideo: Implement capture supportKieran Bingham
Replace the buffer allocation, capture start/stop and request queue stubs with real implementations. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: camera: Extend the interface to support captureNiklas Söderlund
In order to support capture, the camera needs methods to allocate and free buffers, to start and stop the capture and to queue requests. Define those interfaces in the Camera class and implement them to call the corresponding pipeline handler methods. Once a camera is started the pipeline handler of the camera will begin processing requests queued to the camera by the application until it gets stopped. Once a request is created it can be queued to the camera and the application will be notified asynchronously once the request is completed and be able to process all the buffers involved in the request. At this point the request objects don't support controls. This will be extended in the future. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: camera: Cache the stream configuration in the stream objectNiklas Söderlund
The API towards the application and pipeline handler can be simplified if the camera caches which streams have been selected and their respective configuration. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: camera: Add helper to check for exclusive accessNiklas Söderlund
Some operations on the camera requires the application to have exclusive access to the camera. To help check for this in these operations add a helper. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: pipeline_handler: Extend the interface to support captureNiklas Söderlund
In order to support capture, the pipeline handler needs methods to allocate and free buffers, to start and stop the capture and to queue requests. Define those interfaces in the PipelineHandler class and implement them as stubs in the existing pipeline handlers. This initial implementation only considers the allocation of new buffers. Future work would need to expand this to also cover importing buffers from an external source. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: Provide a Request objectJacopo Mondi
Implement a Request object used by applications to queue image capture requests to a camera. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-06libcamera: stream: Add stream configuration to the stream objectNiklas Söderlund
Add a cache of the active stream configuration to the stream object. This cache is to be updated from the Camera object and can be accessed read only from both the application and pipeline handlers. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: stream: Construct a streamKieran Bingham
Construct a stream object with a default internal pool. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-02-06libcamera: Add V4L2SubdeviceJacopo Mondi
Add V4L2Subdevice class that provides an interface to interact with V4L2 defined sub-devices. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: Add geometry.hJacopo Mondi
Add geometry-related definitions in the geometry.h internal header. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-02-06libcamera: v4l2_device: Add comments to method parametersJacopo Mondi
Add missing parameter documentation for set and get format methods. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>