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2020-05-13licenses: License all meson files under CC0-1.0Laurent Pinchart
In an attempt to clarify the license terms of all files in the libcamera project, the build system files deserve particular attention. While they describe how the binaries are created, they are not themselves transformed into any part of binary distributions of the software, and thus don't influence the copyright on the binary packages. They are however subject to copyright, and thus influence the distribution terms of the source packages. Most of the meson.build files would not meet the threshold of originality criteria required for copyright protection. Some of the more complex meson.build files may be eligible for copyright protection. To avoid any ambiguity and uncertainty, state our intent to not assert copyrights on the build system files by putting them in the public domain with the CC0-1.0 license. Signed-off-by: Laurent Pinchart <laurent.pinchar/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2019, Collabora Ltd. * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com> * * gstlibcamerasrc.h - GStreamer Capture Element */ #ifndef __GST_LIBCAMERA_SRC_H__ #define __GST_LIBCAMERA_SRC_H__ #include <g
2020-03-18libcamera: framebuffer_allocator: Lift camera restrictions on allocatorLaurent Pinchart
The Camera class currently requires the allocator to have no allocated buffer before the camera is reconfigured, and the allocator to be destroyed before the camera is released. There's no basis for these restrictions anymore, remove them. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
2020-03-18libcamera: PixelFormat: Make constructor explicitLaurent Pinchart
To achieve the goal of preventing unwanted conversion between a DRM and a V4L2 FourCC, make the PixelFormat constructor that takes an integer value explicit. All users of pixel formats flagged by the compiler are fixed. 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>
2020-03-18libcamera: Use PixelFormat instead of unsigned int where appropriateNiklas Söderlund
Use the PixelFormat instead of unsigned int where a pixel format is to be used. PixelFormat is defined as an unsigned int but is about to be turned into a class to add functionality. There is no functional change in this patch. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: Fix GLib detectionLaurent Pinchart
Commit 17cccc68a88f ("Add GStreamer plugin and element skeleton") has gained a last minute fix for a clang compilation error with GLib prior to v2.63.0. The fix wasn't properly tested, and failed to check the GLib dependency correctly. This resulted in compilation of the GStreamer element to always be disabled. Fix this by changing the GLib package name from 'glib' to 'glib-2.0'. Fixes: 17cccc68a88f ("Add GStreamer plugin and element skeleton") Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
2020-03-07gst: Turn the top-level plugin file gstlibcamera.c into a C++ fileLaurent Pinchart
The top-level plugin file gstlibcamera.c is the only C source file in the whole libcamera GStreamer element. To avoid specifying both C and C++ compiler arguments in the future, turn it into a C++ file. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
2020-03-07gst: libcamerasrc: Prevent src task deadlock on exhausted buffer poolJakub Adam
Allow GstLibcameraPool to notify the source when a new buffer has become available in a previously exhausted buffer pool. This can be used to resume a src task that got paused because it couldn't acquire a buffer. Without this change the src task will never resume from pause once the pool gets exhausted. To trigger the deadlock (it doesn't happen every time), run: gst-launch-1.0 libcamerasrc ! queue ! glimagesink Signed-off-by: Jakub Adam <jakub.adam@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: utils: Factor-out the task resume helperJakub Adam
Task resume will be added in the core GStreamer API in the future and we will need to call this in another location in the following patches. Signed-off-by: Jakub Adam <jakub.adam@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Add a TODO commentNicolas Dufresne
This is to guide upcoming contributors toward what is left to do to get toward a production ready element. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Implement timestamp supportNicolas Dufresne
This is an experimental patch adding timestamp support to the libcamerasrc element. This patch currently assume that the driver timestamp are relative to the system monotonic clock. Without a reference clock source, the timestamp are otherwise unusable, and without timestamp only minor use case can be achieved. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Implement initial streamingNicolas Dufresne
With this patch, the element is now able to push buffers to the next element in the graph. The buffers are currently missing any metadata like timestamp, sequence number. This will be added in the next commit. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: pad: Add method to store retrieve pending buffersNicolas Dufresne
These will be useful for streaming. The requestComplete callback will store the buffers on each pads so that the _run() can pick them up and push them through the pads from a streaming thread. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: Add getters for Stream and FrameBufferNicolas Dufresne
This adds getters on pad/pool/allocator so that we can retrieve the Stream or FrameBuffer. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Allocate and release buffersNicolas Dufresne
Setup the allocation and the release of buffers in the element. We have one pooling GstAllocator that wraps the FrameBufferAllocator and tracks the lifetime of FrameBuffer objects. Then, for each pad we have a GstBufferPool object which is only used to avoid re-allocating the GstBuffer structure every time we push a buffer. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerapad: Allow storing a poolNicolas Dufresne
This adds get/set helper to store a pool on the pad. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: Add a pool and an allocator implementationNicolas Dufresne
This is needed to track the lifetime of the FrameBufferAllocator in relation to the GstBuffer/GstMemory objects travelling inside GStreamer. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Push segment eventNicolas Dufresne
Now that we have stream-start and caps, we can now push a segment event to announce what time will our buffer correlate to. For live sources this is just an open segment in time format. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Implement minimal caps negotiationNicolas Dufresne
This is not expected to work in every possible cases, but should be sufficient as an initial implementation. What it does is that it turns the StreamFormats into caps and queries downstream caps with that as a filter. The result is the subset of caps that can be used. We then keep the first structure in that result and fixate using the default values found in StreamConfiguration as a default in case a range is available. We then validate this configuration and turn the potentially modified configuration into caps that we push downstream. Note that we trust the order in StreamFormats as being sorted best first, but this is not currently in libcamera. A todo has been added in the head of this file as a reminder to fix that in the core. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: utils: Add StreamConfiguration helpersNicolas Dufresne
This adds helpers to deal with the conversion from StreamConfiguration to caps and vice-versa. This is needed to implement caps negotiation. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Send stream start eventNicolas Dufresne
Prior to sending caps, we need to send a stream-start event. This requires generating a stream and a group id. The stream id is random for live sources and the group id is shared across all pads. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Store the srcpad in a vectorNicolas Dufresne
This will allow implementing generic algorithm even if we cannot request pads yet. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerapad: Add a method to access the roleNicolas Dufresne
Each pad can have a different roles. Users will have to request and configure their pads role before moving to a higher state. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Add a task for the streaming threadNicolas Dufresne
Use a GstTask as our internal streaming thread. Unlike GstBaseSrc, we will be running a streaming thread at the element level rather than per pad. This is needed to combine buffer request for multiple pads. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Implement selection and acquisitionNicolas Dufresne
This adds code to select and acquire a camera. With this, it is now possible to run a pipeline like: gst-launch-1.0 libcamerasrc ! fakesink Though no buffer will be streamed yet. In this function, we implement the change_state() virtual method to trigger actions on specific state transitions. Note that we also return GST_STATE_CHANGE_NO_PREROLL in GST_STATE_CHANGE_READY_TO_PAUSED and GST_STATE_CHANGE_PLAYING_TO_PAUSED transitions as this is required for all live sources. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Add a debug categoryNicolas Dufresne
This will allow selecting libcamerasrc traces with the following environment: GST_DEBUG=libcamerasrc:7 Or all libcamera GStreamer element traces using GST_DEBUG="libcamera*:7" Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Add camera-name propertyNicolas Dufresne
This property will be used to select by name the camera to use. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: libcamerasrc: Allocate and add static padNicolas Dufresne
This pad will always be present and will allow simple pipeline to be used to stream from the camera. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: Add pads to the sourceNicolas Dufresne
This simply adds the boiler plate for pads on the source element. The design is that we have one pad, called "src", that will always be present, and then more pads can be requested prior in READY or less state. Initially pads have one property "stream-role" that let you decide which role this pad will have. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: utils: Add simple scoped lockers for GMutex and GRectMutexNicolas Dufresne
While GLib has locker implementation already using g_autoptr(), recursive mutex locker was only introduced in recent GLib. Implement a simple locker for GMutex and GRectMutex in order to allow making locking simpler and safer. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: Add initial device providerNicolas Dufresne
This feature is used with GstDeviceMonitor in order to enumerate and monitor devices to be used with the source element. The resulting GstDevice implementation is also used by application to abstract the configuration of the source element. Implementation notes: - libcamera does not support polling yet - The device ID isn't unique in libcamera yet - The "name" property does not yet exist in libcamerasrc yet Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07gst: Add utility to convert StreamFormats to GstCapsNicolas Dufresne
This transforms the basic information found in StreamFormats to GstCaps. This can be handy to reply to early caps query or inside a device provider. Note that we ignored generated range as they are harmful to caps negotiation. We also don't simplify the caps for readability reasons, so some of the discrete value may be included in a range. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2020-03-07Add GStreamer plugin and element skeletonNicolas Dufresne
This implements the GStreamer plugin interface and adds libcamerasrc element feature to it. This is just enough to allow plugin introspection. gst-inspect-1.0 build/src/gstreamer/libgstlibcamera.so Plugin Details: Name libcamera Description libcamera capture plugin Filename build/src/gstreamer/libgstlibcamera.so Version 0.0.0+1042-6c9f16d3-dirty License LGPL Source module libcamera Binary package libcamera Origin URL https://libcamera.org libcamerasrc: libcamera Source 1 features: GST_PLUGIN_PATH=$(pwd)/build/src/gstreamer gst-inspect-1.0 libcamerasrc Factory Details: Rank primary (256) Long-name libcamera Source Klass Source/Video Description Linux Camera source using libcamera Author Nicolas Dufresne <nicolas.dufresne@collabora.com Plugin Details: Name libcamera Description libcamera capture plugin Filename /home/nicolas/Sources/libcamera/build/src/gstreamer/libgstlibcamera.so Version 0.0.0+1042-6c9f16d3-dirty License LGPL Source module libcamera Binary package libcamera Origin URL https://libcamera.org GObject +----GInitiallyUnowned +----GstObject +----GstElement +----GstLibcameraSrc Pad Templates: none Element has no clocking capabilities. Element has no URI handling capabilities. Pads: none Element Properties: name : The name of the object flags: accès en lecture, accès en écriture, 0x2000 String. Default: "libcamerasrc0" parent : The parent of the object flags: accès en lecture, accès en écriture, 0x2000 Object of type "GstObject" Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> [Silence -Wunused-function warning for older GLib versions] Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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