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2021-09-07cam: drm: Set per-plane offsets when creating DRM frame bufferLaurent Pinchart
Now that libcamera supports per-plane offsets, pass the values to drmModeAddFB2(). The KMS sink in cam is now capable of rendering multi-planar formats. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-09-07cam: drm: Support per-plane stride valuesLaurent Pinchart
The stride is not always identical for all planes for multi-planar formats. Semi-planar YUV formats without horizontal subsampling often have a chroma stride equal to twice the luma stride, and tri-planar YUV formats with a 1/2 horizontal subsampling often have a chroma stride equal to half the luma stride. This isn't correctly taken into account when creating a DRM frame buffer, as the same stride is set for all planes. libcamera doesn't report per-plane stride values yet, but uses chroma strides that match the above description for all currently supported platforms. Calculation the chrome strides appropriately in the KMSSink class, and pass them to DRM::createFrameBuffer(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-09-07cam: file_sink: Use Image class to access pixel dataLaurent Pinchart
Replace the manual implementation of frame buffer mapping with the Image class to improve code sharing. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-09-07cam: Add Image classLaurent Pinchart
The new Image class represents a multi-planar image with direct access to pixel data. It currently duplicates the function of the MappedFrameBuffer class which is internal to libcamera, and will serve as a design playground to improve the API until it is considered ready to be made part of the libcamera public API. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-09-07libcamera: framebuffer: Prevent modifying the number of metadata planesLaurent Pinchart
The number of metadata planes should always match the number of frame buffer planes. Enforce this by making the vector private and providing accessor functions. As this changes the public API, update all in-tree users accordingly. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
2021-08-30cam: file_sink: Use offset in mapping FrameBufferHirokazu Honda
This fixes the way of mapping FrameBuffer in FrameSink by using offset. Signed-off-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-08-05cam: Add support for viewfinder through DRM/KMSLaurent Pinchart
Use the KMSSink class to display the viewfinder stream, if any, through DRM/KMS. The output connector is selected through the new -D/--display argument. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-08-05cam: kms_sink: Enable display on first frameLaurent Pinchart
Not all display controllers support enabling the display without any active plane. Delay display enabling to the first frame. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-08-05cam: Add KMS sink classLaurent Pinchart
Add a KMSSink class to display framebuffers through the DRM/KMS API. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-08-05cam: Add DRM helper classesLaurent Pinchart
To prepare for viewfinder operation through the DRM/KMS API, add a set of helper classes that encapsulate the libdrm functions. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-08-05cam: Rename BufferWriter to FileSinkLaurent Pinchart
Rename the BufferWriter class to FileSink to establish a common naming scheme for all sinks. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-08-05cam: Turn BufferWriter into a FrameSinkLaurent Pinchart
Make the BufferWriter class inherit from FrameSink, and use the FrameSink API to manage it. This makes the code more generic, and will allow usage of other sinks. 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> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-08-05cam: Add FrameSink base classLaurent Pinchart
The FrameSink class serves as a base to implement components that consume frames. This allows handling frame sinks in a generic way, independent of their nature. The BufferWrite class will be ported to FrameSink in a second step. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-08-05cam: event_loop: Add support for file descriptor eventsLaurent Pinchart
Extend the EventLoop class to support watching file descriptors for read and write events. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-07-27cam: options: Restore std::cerr adjustment fieldLaurent Pinchart
The std::cerr adjustment is set to std::left to print the usage text. Restore it to its original value when done, to avoid affecting the caller. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-23cam: Initialize CamApp::loopUsers_Laurent Pinchart
The CamApp loopUsers_ member variable isn't initialized, which results in random execution of the event loop. Fix it. Fixes: caa6ffacb2fc ("cam: Reorganize run() function and merge the two event loops") Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Tested-by: Umang Jain <umang.jain@ideasonboard.com>
2021-07-22cam: Support using multiple cameras concurrentlyLaurent Pinchart
To allow testing capture from multiple cameras concurrently, turn the --camera option into an array option, and create one CameraSession per specified camera. The code is adapted to iterate over the sessions vector instead of handling a single session. Thanks to all the refactoring previously performed, changes are minimal. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Add camera index to file name of capture framesLaurent Pinchart
To prepare for multi-camera support, extend the file naming scheme for captured frames to include the camera index in addition to the stream name and frame number. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Make camera-related options sub-options of OptCameraLaurent Pinchart
Use the new hierarchical options feature of the option parser to turn camera-related option (--capture, --file, --stream, --strict-formats and --metadata) into children of the --camera option. As an added bonus, we don't need to check anymore if a camera has been specified when capture is requested, as that's now enforced by the option parser. This change prepares for support of multiple cameras. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Allow specifying directories in the --file optionLaurent Pinchart
The value of the --file option is the full name of the file to which captured frames are written. To write files to a specific directory with the default naming scheme, the "frame-#.bin" name has to appear at the end of the file name. Simplify usage of the option by allowing --file to specify a directory only. If the file name ends with a '/', the default "frame-#.bin" file name is automatically appended. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Reorganize run() function and merge the two event loopsLaurent Pinchart
Reorganize the run() function to make it more readable, and merge the two event loops into one as capture and hotplug monitoring don't have to be mutually exclusive. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Move session_ member variable to a local variable in run() functionLaurent Pinchart
The session_ member of the CamApp class is only needed in the run() function. Make it a local variable. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Move printing of camera information to CameraSession classLaurent Pinchart
The three CamApp functions listControls(), listProperties() and infoConfiguration() operate on a camera. They would thus be better placed in the CameraSession class. Move them there. As they now have no error to return anymore, make them void functions. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Move camera session creation and monitoring setup to run()Laurent Pinchart
Move creation of the camera session and setup of the hotplug monitoring from the init() function to the run() function, to group all the code that performs operations based on command line options in a single place. The cleanup() call on session creation failure isn't required anymore, as the cleanup() function is called unconditionally upon return from run(). This change allows merging two different code blocks related to hotplug monitoring. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Make CamApp::cameraName() staticLaurent Pinchart
The CamApp::cameraName() doesn't need to access any member of the CamApp class. Make it static. While at it, drop an unneeded const from the return value. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Drop unneeded error check and messageLaurent Pinchart
The EventLoop::exec() function returns the exit code of the event loop, not an error status. Drop the corresponding error check and error message. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Use std::unique_ptr<> to manage CameraManagerLaurent Pinchart
Store the CameraManager instance in a unique_ptr to simplify memory management and avoid leaks. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Move camera acquire to the CameraSession classLaurent Pinchart
Continue moving towards making the CameraSession class the central point to handle a camera by moving the camera acquire operation. A new CameraSession::camera() function is needed to allow access to the camera from CamApp. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Move CameraConfiguration creation to CameraSession classLaurent Pinchart
Creating a configuration for a camera is an operation that logically belongs to the CameraSession class. Move it there. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Store camera session pointer in CamApp classLaurent Pinchart
Move the local CameraSession variable from the CamApp::run() function to a member variable of the CamApp class, created in CamApp::init(). This is a first step towards moving code to the CameraSession class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: camera_session: Use std::unique_ptr<> to manage class membersLaurent Pinchart
Store the BufferWriter and FrameBufferAllocator pointers in std::unique_ptr<> instances to simplify memory management and avoid leaks. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Move event loop execution from CameraSession to CamAppLaurent Pinchart
To prepare for multiple concurrent camera sessions, move the event loop exec() call from the CameraSession class to the CamApp class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Move event loop exit from CameraSession to CamAppLaurent Pinchart
Make exiting the event loop the responsibility of the application, not the camera session, to prepare for support of multiple camera sessions. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: camera_session: Access event loop through global instanceLaurent Pinchart
Don't pass the event loop to the CameraSession constructor, as passing this global object explicitly isn't a design that can scale. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: Rename Capture to CameraSessionLaurent Pinchart
Rename the Capture class to CameraSession, to prepare for multi-camera support that will gather more camera-related operations than capture in that class. While at it, remove an unneeded blank line. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Fail parsing when non-option arguments are foundLaurent Pinchart
The options parser currently ignores non-option arguments silently, which is confusing. It's a common error to run 'cam -c1 -C 10' and expect only 10 frames to be captured. As the -C option takes an optional argument, the number 10 is interpreted as a non-option argument instead of the argument to the -C option. Fail parsing with an appropriate message and print usage information when a non-option argument is found. The parser may be extended later to accept non-option arguments when the application has a use for them. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2021-07-22cam: options: Avoid copies of OptionvValue and KeyValueParser::OptionsLaurent Pinchart
The OptionValue toKeyValues() and toArray() functions return a copy of the values. This is unnecessary, and can cause use-after-free issues when taking references to the return values. Return references instead to optimize the implementation and avoid issues. The behaviour of the two functions is now undefined in case of an option type mismatch. The current implementation catches this with an assertion. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2021-07-22cam: stream_options: Use OptionValue::empty() to test if option is setLaurent Pinchart
The roles() and updateConfiguration() functions check if the OptStream OptionValue they receive is empty by first casting it to an array. To prepare for the toArray() function not allowing such a cast when the option value is empty, test if the option value is empty instead. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2021-07-22cam: options: Add empty() function to OptionValue classLaurent Pinchart
Add a convenience helper to check if an option value is empty, based on the value type. This is useful as a shortcut syntax to check if an option has been set. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
2021-07-22cam: options: Drop some OptionValue cast operatorsLaurent Pinchart
While OptionValue cast operators to int and std::string allow useful shortcut syntaxes, the cast operators to KeyValueParser::Options and std::vector<OptionValue> are less useful. A an explicit static_cast call would be more cumbersome to write than an explicit .toKeyValues() or toArray(), and implicit cast hide too much of what's going on. Drop those two cast operators, and replace the only implicit cast occurrence with .toKeyValues(). While at it, drop the local opts variable in StreamKeyValueParser::roles() as it isn't used. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Support parent-child relationship between optionsLaurent Pinchart
Add support for creating a tree-based hieararchy of options instead of a flat list. This is useful to support options that need to be interpreted in the context of a particular occurrence of an array option. The usage text automatically documents the options in their corresponding context: Options: -c, --camera camera ... Specify which camera to operate on, by id or by index -h, --help Display this help message -I, --info Display information about stream(s) -l, --list List all cameras --list-controls List cameras controls -p, --list-properties List cameras properties -m, --monitor Monitor for hotplug and unplug camera events Options valid in the context of --camera: -C, --capture[=count] Capture until interrupted by user or until <count> frames captured -F, --file[=filename] Write captured frames to disk If the file name ends with a '/', it sets the directory in which to write files, using the default file name. Otherwise it sets the full file path and name. The first '#' character in the file name is expanded to the camera index, stream name and frame sequence number. The default file name is 'frame-#.bin'. -s, --stream key=value[,key=value,...] ... Set configuration of a camera stream height=integer Height in pixels pixelformat=string Pixel format name role=string Role for the stream (viewfinder, video, still, raw) width=integer Width in pixels --strict-formats Do not allow requested stream format(s) to be adjusted --metadata Print the metadata for completed requests Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Move key string left in usage() for key-value parserLaurent Pinchart
When printing usage information for a key-value parser, the documentation of the keys and values is printed in the second column of the usage text: -s, --stream key=value[,key=value,...] ... Set configuration of a camera stream height=integer Height in pixels pixelformat=string Pixel format name role=string Role for the stream (viewfinder, video, still, raw) width=integer Width in pixels -h, --help Display this help message This results in long lines. Improve this by moving the key description to the first column, and aligning the value description as other option description text: -s, --stream key=value[,key=value,...] ... Set configuration of a camera stream height=integer Height in pixels pixelformat=string Pixel format name role=string Role for the stream (viewfinder, video, still, raw) width=integer Width in pixels -h, --help Display this help message Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Disable copy for parsersLaurent Pinchart
Copying the OptionsParser class would result in the optionsMap_ entries pointing to Option entries of the original instance. As there's no use case for copying the class, disable copying. Disable copying of KeyValueParser as well for consistency as there's no use case either. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Slit OptionsParser::usage() in two functionsLaurent Pinchart
To prepare for code reuse, split the printing of options out of OptionsParser::usage() to a separate function. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Add optionName() function to Option structureLaurent Pinchart
Add an Option::optionName() function that returns a string describing the option name, with leading dashes. As a result, OptionsParser::parseValueError() function becomes a single-line function and can be inlined in its caller. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Move OptionValue class after OptionsParserLaurent Pinchart
To prepare for usage of the OptionsParser::Options class in OptionValue, move the definition of the OptionValue class after OptionsParser. There is no functional change. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Document the options parser APILaurent Pinchart
Before extending the option parser, document its existing API. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Move Option struct to options.cppLaurent Pinchart
The Option structure is an internal implementation detail and shouldn't be exposed in the API. Move it to options.cpp. This requires moving the inline constructors and destructors for the KeyValueParser and OptionsParser classes to options.cpp as well, as they need a full definition of the Option structure. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-22cam: options: Make KeyValueParser::usage() privateLaurent Pinchart
The KeyValueParser::usage() function is meant to be called from an OptionsParser or another KeyValueParser only. Make it private, and set the OptionsParser class as a friend of the KeyValueParser class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-11libcamera: buffer: Rename buffer.h to framebuffer.hLaurent Pinchart
libcamera names header files based on the classes they define. The buffer.h file is an exception. Rename it to framebuffer.h. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>