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It's not allowed in GStreamer to push events while holding the object
lock. This reduce the scope into which we hold the object lock. In
fact we don't need to protect against gst_task_resume() concurrency
when we stop the task as resume only do something if the task is paused.
This fixes a deadlock when running multiple instances of libcamerasrc
and closing one of the streaming window.
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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It's not allowed to have multiple instances of CameraManager. This
requirement is not easy for GStreamer were the device monitor and
the camerasrc, or two camerasrc instances don't usually have any
interaction between each other. Fix this by implementing a minimalist
singleton around CameraManager constructor and start()/stop()
operations.
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Change format specifier %s to %u in name template field of request pad
template.
Pad names are as follows, src_0, src_1, etc. So, instead of using string
format specifier, use unsigned integer format specifier.
Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
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This patch adds group_id in GstLibcameraSrcState, since group_id is
something which should be same for all the pads, it can be reused
later.
Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
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This patch adds support for using request pads in libcamerasrc Gst
Element. It allows a user to request multiple streams if the platform
supports multistream output using libcamera.
This was tested on Raspberry Pi 4B+ with a camera connected to CSI port.
It can be tested by running the following command
gst-launch-1.0 libcamerasrc camera-name="<camera-name-here>" name=src src.src ! queue ! videoconvert ! autovideosink src.src_0 ! queue ! videoconvert ! autovideosink
Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
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The return value from generateConfiguration() was not checked. Only assert
was added as a guard which checked if the size of the generated camera
config was equal to size of roles passed to it.
If the roles variable has an invalid/unsupported role, it will return
a nullptr and then trying to access a member on a nullptr for size comparison
will result in a segmentation fault. So, if the function returns a nullptr,
simply push an error message on GstBus and gracefully exit.
Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
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Currently, when allocating buffers, the streams of the Camera object are
used. Instead the streams of the CameraConfiguration object should be
used. This is because the Camera object holds all available streams
while the CameraConfiguration holds only the streams associated with the
current configuration.
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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If gst_buffer_pool_acquire_buffer in gst_libcamera_task_run fails, the
unique_ptr to the request-object gets reset and hence, its destructor
is called. However, the wrap-object points to the same object and is
still alive at this moment. When the task_run-function is finished, the
destructor of the wrap-object is called, which in return calls the
destructor of the request-object again.
Instead of taking care of both, the request and the wrap-object, we can
move the request to the wrap which will then effectively take care of
the request object automatically.
Signed-off-by: Marian Cichy <m.cichy@pengutronix.de>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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When closing the libcamerasrc, the reference to camera is released and
the camera manager is stopped. However, the camera configuration still
exists at that point, and holds a reference to the camera. This leads to
a warning from the device enumerator complaining that the media devices
are still in use:
[1:53:48.792327560] [408] ERROR DeviceEnumerator device_enumerator.cpp:165 Removing media device /dev/media1 while still in use
[1:53:48.792354022] [408] ERROR DeviceEnumerator device_enumerator.cpp:165 Removing media device /dev/media0 while still in use
A crash follows when the libcamerasrc is finalized, as deleting the
camera configuration will then release the last reference to the camera,
which attempts to delete the camera object with deleteLater() without an
event dispatcher.
Fix it by deleting the camera configuration before stopping the camera
manager.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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Macros used in gstreamer (e.g. G_DEFINE_TYPE) are functions. The
end semicolons with the macros are unnecessary.
Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Allow reuse of the Request object by implementing reuse(). This means
the applications now have the responsibility of freeing the Request
objects, so make all libcamera users (cam, qcam, v4l2-compat, gstreamer,
android) do so.
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>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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We build libcamera with -Wno-unused-parameter and this doesn't cause
much issue internally. However, it prevents catching unused parameters
in inline functions defined in public headers. This can lead to
compilation warnings for applications compiled without
-Wno-unused-parameter.
To catch those issues, remove -Wno-unused-parameter and fix all the
related warnings with [[maybe_unused]].
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>
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Rename Camera::name() to camera::id() to better describe what it
represents, a unique and stable ID for the camera. While at it improve
the documentation for the camera ID to describe it needs to be stable
for a camera between resets of the system.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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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