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2019-07-10Documentation: Fix trivial spelling errorKieran Bingham
harware -> hardware Reported-by: Hans Verkuil <hverkuil@xs4all.nl> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-07-09libcamera: Rework automatic version generation to avoid rebuildsLaurent Pinchart
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>
2019-07-04Documentation: Wrap extended doc_install_dir lineKieran Bingham
The doc_install_dir is longer than 80 chars. Wrap it accordingly. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-07-04qcam: Update window title with FPSKieran Bingham
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>
2019-07-04qcam: Add the version string to the titleKieran Bingham
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>
2019-07-04qcam: Move static timestamp to MainWindowKieran Bingham
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>
2019-07-04libcamera: Auto generate version informationKieran Bingham
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>
2019-07-04Documentation: Make the project brief more expressiveKieran Bingham
The current project brief lacks any quotation marks, and causes the Doxygen API documents to show the header "libcameraframework". Replace the simplistic definition with a better brief, and ensure quotation marks are provided to maintain spacing. Fixes: 53c4d4c34fc4 ("Documentation: Generate source code documentation using Doxygen") Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-07-04utils: checkstyle.py: Add pep8 checkerKieran Bingham
Process python additions with pep8 and report any errors that are added. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-07-04test: Allow self-contained tests to run in parallelNiklas Söderlund
The IPA, IPC and Stream tests are self-contained so they can run in parallel. 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>
2019-07-04utils: checkstyle.py: Add Doxygen formatterLaurent Pinchart
Add a formatter for doxygen comments. In its initial implementation the formatter ensures that the first word of a \return statement starts with an uppercase letter. 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>
2019-07-04libcamera: v4l2_videodevice: Re-group operationsJacopo Mondi
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>
2019-07-04libcamera: ipa_module: elfLoadSymbol find symbol regardless of sizePaul Elder
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>
2019-07-04libcamera: ipa_module: add path to module loading error messagePaul Elder
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>
2019-07-02libcamera: ipa_module: add path getterPaul Elder
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>
2019-07-02libcamera: ipa_module_info: remove cplusplus guardsPaul Elder
IPA modules must be implemented in C++, which means we no longer need __cplusplus guards, so remove them. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-07-02libcamera: test: Add ControlList testsKieran Bingham
Add tests of the ControlList infrastructure and public API. 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>
2019-07-02libcamera: test: Add ControlInfo testKieran Bingham
Provide an initial test coverage for the ControlInfo class. 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>
2019-07-02libcamera: test: Add ControlValue testKieran Bingham
Add initial basic testing for the new ControlValue class. 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>
2019-07-02libcamera: pipeline: vimc: Add controls supportLaurent Pinchart
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>
2019-07-02libcamera: pipeline: uvcvideo: Add controls supportKieran Bingham
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>
2019-07-02libcamera: controls: Add a set of initial controlsLaurent Pinchart
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>
2019-07-02libcamera: request: Add a ControlListKieran Bingham
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>
2019-07-02libcamera: controls: Extend ControlList to access controls by IDLaurent Pinchart
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>
2019-07-02libcamera: camera: Provide a list of ControlInfoKieran Bingham
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>
2019-07-02libcamera: controls: Introduce control-related data typesKieran Bingham
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>
2019-07-02libcamera: v4l2_device: Add method to retrieve all supported controlsLaurent Pinchart
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>
2019-07-02libcamera: v4l2_controls: Add min and max to V4L2ControlInfoLaurent Pinchart
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>
2019-07-02libcamera: ipc: unix: Make socket operation asynchronousLaurent Pinchart
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>
2019-07-02test: ipc: unix: Add test for IPCUnixSocketNiklas Söderlund
Test that the IPC supports sending data and file descriptors over the IPC medium. To be able to execute the test two parts are needed, one to drive the test and act as the libcamera (master) and a one to act as the IPA (slave). The master drives the testing posting requests to the slave to process and sometimes respond to. A few different tests are performed. - Master sends an array to the slave which responds with a reversed copy of the array. The master verifies that a reversed array is returned. - Master tries to send an empty message making sure that the send call fails. - Master sends a list of file descriptors and ask the slave to calculate and respond with the sum of the size of the files. The master verifies that the calculated size is correct. - Master sends a pre-computed size and a list of file descriptors and asks the slave to verify that the pre-computed size matches the sum of the size of the file descriptors. - Master sends two file descriptors and asks the slave to join the file contents in a new file and respond with its file descriptor. The master then verifies that the content of the returned file descriptor matches the order of the original two files. 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>
2019-07-02libcamera: ipc: unix: Add a IPC mechanism based on Unix socketsNiklas Söderlund
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>
2019-07-01test: timer: Add dynamically allocated timer testLaurent Pinchart
Timers should be automatically stopped and unregistered when deleted. Add a test to verify this is the case. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-07-01libcamera: timer: Stop timer when it is deletedNiklas Söderlund
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>
2019-07-01libcamera: Use 'files()' function to specify gen-header.shKieran Bingham
The files() function generates a variable with the location of the referenced files. This is shorter than joining the current_source_dir() of which use is somewhat frowned upon. Fixes: 90de3690c456 ("libcamera: Auto-generate libcamera.h") Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-07-01utils: checkstyle.py: Add meson.build checkerLaurent Pinchart
Add a meson.build checker that warns when tabs are used. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-07-01utils: checkstyle.py: Refactor formatters and checkers supportLaurent Pinchart
Introduce two new base classes for the code formatters and style checkers, with an auto-registration mechanism that automatically uses all derived classes. This will allow easier addition of new formatters and checkers. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2019-06-30libcamera: v4l2_device: Fix variable-sized object initializationNiklas Söderlund
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>
2019-06-27libcamera: v4l2_device: Fix control enumeration bugJacopo Mondi
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>
2019-06-25libcamera: event_dispatcher_poll: Remove struct keyword from for-rangeKieran Bingham
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>
2019-06-25cam: capture: Stop stream when queueRequest() failsHelen Koike
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>
2019-06-25libcamera: ipu3: Set pipe_mode based on stream configurationJacopo Mondi
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>
2019-06-25libcamera: camera_sensor: Add V4L2 control operationsJacopo Mondi
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>
2019-06-25libcamera: v4l2_device: Implement get and set controlsJacopo Mondi
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>
2019-06-25libcamera: v4l2_device: List valid controls at openJacopo Mondi
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>
2019-06-25libcamera: Add V4L2ControlsJacopo Mondi
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>
2019-06-19meson: Link against libc++ with compiling with clangLaurent Pinchart
libc++ is used by Chrome OS, and likely as well by other environments based on clang. Using it by default if available when compiling with clang will help extending the compile-testing coverage. The drawback is that issues specific to clang with libstdc++ will not be caught as easily, but based on the experience with clang so far, code compiling correctly with gcc/libstdc++ has failed with clang due to either clang-specific or libc++-specific behaviour, never due only to the combination of clang with libstdc++. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2019-06-19libcamera: formats: Add missing includeJacopo Mondi
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>
2019-06-19libcamera: stream: Include missing array headerLaurent Pinchart
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>
2019-06-19libcamera: v4l2_videodevice: Update documentationJacopo Mondi
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>
2019-06-19libcamera: Introduce V4L2Device base classJacopo Mondi
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>