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2021-09-02libcamera: Drop emitter object pointer from signal argumentsLaurent Pinchart
Many signals used in internal and public APIs carry the emitter pointer as a signal argument. This was done to allow slots connected to multiple signal instances to differentiate between emitters. While starting from a good intention of facilitating the implementation of slots, it turned out to be a bad API design as the signal isn't meant to know what it will be connected to, and thus shouldn't carry parameters that are solely meant to support a use case specific to the connected slot. These pointers turn out to be unused in all slots but one. In the only case where it is needed, it can be obtained by wrapping the slot in a lambda function when connecting the signal. Do so, and drop the emitter pointer from all signals. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-09-02libcamera: Don't use emitter object pointer argument to slotLaurent Pinchart
In many cases, the emitter object passed as a pointer from signals to slots is also available as a class member. Use the class member when this occurs, to prepare for removal of the emitter object pointer from signals. In test/event.cpp, this additionally requires moving the EventNotifier to a class member. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-08-19ipa: Use FileDescriptor instead of int in layers above IPC payloadPaul Elder
Regarding (de)serialization in isolated IPA calls, we have four layers: - struct - byte vector + fd vector - IPCMessage - IPC payload The proxy handles the upper three layers (with help from the IPADataSerializer), and passes an IPCMessage to the IPC mechanism (implemented as an IPCPipe), which sends an IPC payload to its worker counterpart. When a FileDescriptor is involved, previously it was only a FileDescriptor in the first layer; in the lower three it was an int. To reduce the risk of potential fd leaks in the future, keep the FileDescriptor as-is throughout the upper three layers. Only the IPC mechanism will deal with ints, if it so wishes, when it does the actual IPC. IPCPipeUnixSocket does deal with ints for sending fds, so the conversion between IPCMessage and IPCUnixSocket::Payload converts between FileDescriptor and int. Additionally, change the data portion of the serialized form of FileDescriptor to a 32-bit unsigned integer, for alightnment purposes and in preparation for conversion to an index into the fd array. Also update the deserializer of FrameBuffer::Plane accordingly. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Tested-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-08-18utils: ipc: ipa_proxy_worker: Log IPCUnixSocket::send() failuresLaurent Pinchart
The IPCUnixSocket::send() function may fail, in which case it can be useful for debugging to log an error message that tells which event was affected. Do so. Reported-by: Coverity CID=35483[6-9] Reported-by: Coverity CID=35484[01] 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>
2021-08-05utils: ipc: Initialise ThreadProxyKieran Bingham
The ThreadProxy IPA template does not implement a constructor and the default compiler generated constructor does not initialise the private ipa_ pointer. Whilst this should not be expected to be used while uninitialised, it does get caught by static analysis for every IPA module constructed, so lets be clean and fix it. Reported-by: Coverity CID=350116 Reported-by: Coverity CID=350123 Reported-by: Coverity CID=350140 Reported-by: Coverity CID=350147 Fixes: 7832e19a599e ("utils: ipc: add templates for code generation for IPC mechanism") Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-07-27utils: ipc: Assign a new gid to proxy workerUmang Jain
Isolated IPAs are forked to a new process by the proxy worker, which shares the same process group. This allows the undesired effect that the proxy worker will receive signals such as SIGINT and will be closed by a Ctrl-C event before the pipeline handlers have been able to fully clean up. Prevent this signal from being delivered to the proxy worker by moving the process to a new process group, matching the pid of the isolated proxy. Bug: https://bugs.libcamera.org/show_bug.cgi?id=60 Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
2021-07-09utils: ipc: proxy: Reset ControlSerializer during IPA configureUmang Jain
ControlSerializer should be reset during IPA (re)configuration, so that it doesn't look up stale deserialized cache built from consecutive previous runs. This is already recommended in ControlSerializer docs but the implementation seems missing. The stale cache lookup seems to the core issue with Bug #58. Bug: https://bugs.libcamera.org/show_bug.cgi?id=58 Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-06-25libcamera/base: Move extended base functionalityKieran Bingham
Move the functionality for the following components to the new base support library: - BoundMethod - EventDispatcher - EventDispatcherPoll - Log - Message - Object - Signal - Semaphore - Thread - Timer While it would be preferable to see these split to move one component per commit, these components are all interdependent upon each other, which leaves us with one big change performing the move for all of them. Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-05-24ipa: Move core IPA interface documentation to a .cpp fileUmang Jain
Moving the core.mojom documentation to its corresponding .cpp file (core_ipa_interface.cpp). This will allow Doxygen to generate the documentation for IPABuffer, IPASettings and IPAStream structures. Since the .mojom files are placed in include/ directory, the .cpp file will live in $sourcedir/src/libcamera/ipa/ - which can also contain documentation for other mojom generated IPA interfaces in subsequent commit. Also hide the constructors in generated IPA interface from doxygen, via #ifndef __DOXYGEN__. These constructors provide no major value in documenting them, instead will spew out doxygen warnings during the build. Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-04-27utils: ipc: Use the proper namespace for mojom structsPaul Elder
Structs defined in mojom previously used the namespace of the mojom file that was being used as the source. This is obviously not the correct namespace for structs that are defined in core.mojom. Fix the jinja function for getting the element type including namespace, and use it. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-03-29utils: ipc: proxy: Track IPA with a state machineKieran Bingham
Asynchronous tasks can only be submitted while the IPA is running. Further more, the shutdown sequence can not be tracked with a simple running flag. We can also be in the state 'Stopping' where we have not yet completed all events, but we must not commence anything new. Refactor the running_ boolean into a stateful enum to track this. Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-03-24utils: ipc: proxy: Process pending messagesLaurent Pinchart
Events may be queued to the pipeline handler between the pipeline handler entering the ::stop() function, and before the call to stop the IPA has completed. Handle these events by dispatching all pending messages at the proxy after the IPA has fully stopped. Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-03-24utils: ipc: proxy: Assert asynchronous calls execute in the running stateLaurent Pinchart
Signals and calls from the IPA should not occur after the IPA has been put into the stopped state. Add assertions to catch and prevent any messages being processed after this. Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2021-03-09utils: ipc: Make first output parameter direct return if int32Paul Elder
To make it more convenient for synchronous IPA calls to return a status, convert the first output into a direct return if it is an int32. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Naushir Patuck <naush@raspberrypi.com>
2021-03-09utils: ipc: Support custom parameters to init()Paul Elder
Add support to the mojom-based code generator for custom parameters to init(). Remove the parameter type and count validation as well. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-03-04utils: ipc: templates: Drop unused variableLaurent Pinchart
The has_input variable is unused, drop it. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-02-16utils: ipc: add templates for code generation for IPC mechanismPaul Elder
Add templates to mojo to generate code for the IPC mechanism. These templates generate: - module header - module serializer - IPA proxy cpp, header, and worker Given an input data definition mojom file for a pipeline. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Acked-by: Jacopo Mondi <jacopo@jmondi.org> Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>